ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Articles  (21,674)
  • Polymer and Materials Science  (20,269)
  • Physical Chemistry  (717)
  • Rats  (687)
  • Fisheries
  • Inorganic Chemistry
  • 1995-1999  (8,362)
  • 1990-1994  (12,391)
  • 1950-1954  (921)
  • Physics  (21,674)
Collection
  • Articles  (21,674)
Source
Keywords
Publisher
Years
Year
Journal
Topic
  • 1
    Electronic Resource
    Electronic Resource
    Effect of lithium on thyroidal 131iodine uptake, its clearance, and circulating levels of triiodothyronine and thyroxine in lead-treated rats (1999)
    Springer
    Radiation and environmental biophysics 38 (1999), S. 261-266 
    Details
    ISSN: 1432-2099
    Keywords: Key words Iodine uptake ; Lead ; Lithium ; Rats ; Thyroid ; Thyroid hormones
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Physics
    Notes: Abstract  The influence of lead acetate (50 mg per kg body weight) on the 131iodine (131I) biokinetics (uptake and retention) in rat thyroid and serum levels of triiodothyronine (T3) as well as thyroxine (T4) was evaluated as a function of time and in combination with lithium treatment. The 2-h and 24-h uptake of 131I in the thyroid was stimulated significantly by lead treatment. The 24-h uptake showed a maximum stimulation after 4 months of lead treatment. Lithium supplementation, however, showed the opposite effect by reducing the iodine uptake, whereby the maximum decrease was noticed after 2 months of treatment. Further, simultaneous lead and lithium treatment resulted in an even more pronounced increase of 2-h 131I uptake with a maximum after 3 months. However, the 24-h uptake after 3 months and 4 months of treatment did not differ significantly from the lead treated reference groups. The thyroidal biological half-life of 131I (Tbiol) was found to have clearly increased following the lead/lithium treatment. Interestingly, the combined lead/lithium treatment applied for 4 months caused a further growth of Tbiol, thus reflecting an increased retention of 131I. A maximum increase of Tbiol was seen after 2 months of combined treatment. A progressive decline of the circulating T3 and T4 levels following lead or lithium treatment was noticed and was more pronounced after combined treatment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004110050166
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    facet.materialart.
    Unknown
    Neurons and silicon get intimate (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-05-18
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Service, R F -- New York, N.Y. -- Science. 1999 Apr 23;284(5414):578-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10328734" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Electric Stimulation ; Electrodes ; Electrodes, Implanted ; *Electronics ; Electrophysiology ; Humans ; Nerve Net/*physiology ; Nervous System Diseases/*therapy ; Neurons/*physiology ; Rats ; Silicon ; *Transistors, Electronic
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 3
    facet.materialart.
    Unknown
    Stem cells. Rat spinal cord function partially restored (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wickelgren, I -- New York, N.Y. -- Science. 1999 Dec 3;286(5446):1826-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10610569" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Astrocytes/cytology ; Cell Differentiation ; Cell Survival ; Embryo, Mammalian ; Mice ; Neurons/cytology ; Oligodendroglia/cytology ; Rats ; Spinal Cord/cytology/*physiology ; Spinal Cord Injuries/*therapy ; *Stem Cell Transplantation ; Stem Cells/cytology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 4
    facet.materialart.
    Unknown
    Key brain receptor gets an unusual regulator (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wickelgren, I -- New York, N.Y. -- Science. 1999 Nov 12;286(5443):1265-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10610528" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Astrocytes/*enzymology ; Brain/*enzymology ; Cloning, Molecular ; Glutamic Acid/metabolism ; Neurons/metabolism ; Racemases and Epimerases/*genetics/metabolism ; Rats ; Receptors, N-Methyl-D-Aspartate/metabolism ; Serine/*biosynthesis/metabolism ; Stereoisomerism ; Synapses/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 5
    facet.materialart.
    Unknown
    Filling in the blanks of the GABAB receptor (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-01-23
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wickelgren, I -- New York, N.Y. -- Science. 1999 Jan 1;283(5398):14-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9917254" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/metabolism ; Cells, Cultured ; Dimerization ; Drug Design ; Humans ; Neurons/*metabolism ; Potassium Channels/metabolism ; Rats ; Receptors, GABA-B/*chemistry/*metabolism ; Signal Transduction ; gamma-Aminobutyric Acid/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 6
    facet.materialart.
    Unknown
    Rapid spine delivery and redistribution of AMPA receptors after synaptic NMDA receptor activation (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-06-12
    Description: To monitor changes in alpha-amino-3-hydroxy-5-methyl-4-isoxazole propionate (AMPA) receptor distribution in living neurons, the AMPA receptor subunit GluR1 was tagged with green fluorescent protein (GFP). This protein (GluR1-GFP) was functional and was transiently expressed in hippocampal CA1 neurons. In dendrites visualized with two-photon laser scanning microscopy or electron microscopy, most of the GluR1-GFP was intracellular, mimicking endogenous GluR1 distribution. Tetanic synaptic stimulation induced a rapid delivery of tagged receptors into dendritic spines as well as clusters in dendrites. These postsynaptic trafficking events required synaptic N-methyl-D-aspartate (NMDA) receptor activation and may contribute to the enhanced AMPA receptor-mediatedtransmission observed during long-term potentiation and activity-dependent synaptic maturation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shi, S H -- Hayashi, Y -- Petralia, R S -- Zaman, S H -- Wenthold, R J -- Svoboda, K -- Malinow, R -- New York, N.Y. -- Science. 1999 Jun 11;284(5421):1811-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10364548" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Dendrites/*metabolism/ultrastructure ; Electric Stimulation ; Hippocampus/cytology/physiology ; Humans ; Long-Term Potentiation ; *Neuronal Plasticity ; Neurons/*physiology ; Organ Culture Techniques ; Rats ; Receptor Aggregation ; Receptors, AMPA/*metabolism ; Receptors, N-Methyl-D-Aspartate/*physiology ; Recombinant Fusion Proteins/metabolism ; Synapses/metabolism/*physiology ; Synaptic Transmission ; Tetany
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 7
    facet.materialart.
    Unknown
    Calmodulin dependence of presynaptic metabotropic glutamate receptor signaling (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-11-05
    Description: Glutamatergic neurotransmission is controlled by presynaptic metabotropic glutamate receptors (mGluRs). A subdomain in the intracellular carboxyl-terminal tail of group III mGluRs binds calmodulin and heterotrimeric guanosine triphosphate-binding protein (G protein) betagamma subunits in a mutually exclusive manner. Mutations interfering with calmodulin binding and calmodulin antagonists inhibit G protein-mediated modulation of ionic currents by mGluR 7. Calmodulin antagonists also prevent inhibition of excitatory neurotransmission via presynaptic mGluRs. These results reveal a novel mechanism of presynaptic modulation in which Ca(2+)-calmodulin is required to release G protein betagamma subunits from the C-tail of group III mGluRs in order to mediate glutamatergic autoinhibition.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉O'Connor, V -- El Far, O -- Bofill-Cardona, E -- Nanoff, C -- Freissmuth, M -- Karschin, A -- Airas, J M -- Betz, H -- Boehm, S -- New York, N.Y. -- Science. 1999 Nov 5;286(5442):1180-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurochemistry, Max Planck Institute for Brain Research, Deutschordenstrasse 46, 60528 Frankfurt, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10550060" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Calcium/metabolism ; Calmodulin/antagonists & inhibitors/*metabolism ; Cells, Cultured ; Dimerization ; G Protein-Coupled Inwardly-Rectifying Potassium Channels ; GTP-Binding Proteins/*metabolism ; Glutamic Acid/*metabolism ; Hippocampus/cytology/metabolism ; Humans ; Mice ; Molecular Sequence Data ; Neurons/metabolism ; Potassium Channels/metabolism ; *Potassium Channels, Inwardly Rectifying ; Presynaptic Terminals/metabolism ; Propionates/pharmacology ; Rats ; Rats, Sprague-Dawley ; Receptors, Metabotropic Glutamate/antagonists & inhibitors/*metabolism ; Recombinant Fusion Proteins/metabolism ; Sesterterpenes ; Signal Transduction ; Swine ; *Synaptic Transmission ; Terpenes/pharmacology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 8
    facet.materialart.
    Unknown
    AP-2 recruitment to synaptotagmin stimulated by tyrosine-based endocytic motifs (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-08-24
    Description: Clathrin-mediated endocytosis is initiated by the recruitment of the clathrin adaptor protein AP-2 to the plasma membrane where the membrane protein synaptotagmin is thought to act as a docking site. AP-2 also interacts with endocytic motifs present in other cargo proteins. Peptides with a tyrosine-based endocytic motif stimulated binding of AP-2 to synaptotagmin and enhanced AP-2 recruitment to the plasma membrane of neuronal and non-neuronal cells. This suggests a mechanism by which nucleation of clathrin-coated pits is stimulated by the loading of cargo proteins.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Haucke, V -- De Camilli, P -- CA46128/CA/NCI NIH HHS/ -- NS36252/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1999 Aug 20;285(5431):1268-71.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell Biology and Howard Hughes Medical Institute, Yale University School of Medicine, 295 Congress Avenue, New Haven, CT 06510, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10455054" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptor Protein Complex alpha Subunits ; Adaptor Proteins, Vesicular Transport ; Animals ; Binding Sites ; CHO Cells ; *Calcium-Binding Proteins ; Cattle ; Cell Membrane/metabolism ; Clathrin/*metabolism ; Coated Pits, Cell-Membrane/*metabolism ; Cricetinae ; *Endocytosis ; Membrane Glycoproteins/chemistry/*metabolism ; Membrane Proteins/*metabolism ; Nerve Tissue Proteins/chemistry/*metabolism ; Neurons/metabolism ; Oligopeptides/chemistry/metabolism/*pharmacology ; Phospholipase D/metabolism ; Protein Binding ; Rats ; Recombinant Fusion Proteins/metabolism ; Synaptic Membranes/*metabolism ; Synaptotagmins ; Tyrosine/chemistry
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 9
    facet.materialart.
    Unknown
    Techsigting. Neural regeneration. Some nerve! (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-05-08
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sikorski, R -- Peters, R -- New York, N.Y. -- Science. 1999 Apr 16;284(5413):453.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10232993" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Differentiation ; Cell Division ; Cell Separation ; Chick Embryo ; Neural Crest/*cytology/embryology ; Neuroglia/*cytology ; Neurons/*cytology ; Rats ; Regeneration ; Sciatic Nerve/*cytology/embryology ; Stem Cells/*cytology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 10
    facet.materialart.
    Unknown
    Role of DNA 5-methylcytosine transferase in cell transformation by fos (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-01-15
    Description: The Fos and Jun oncoproteins form dimeric complexes that stimulate transcription of genes containing activator protein-1 regulatory elements. We found, by representational difference analysis, that expression of DNA 5-methylcytosine transferase (dnmt1) in fos-transformed cells is three times the expression in normal fibroblasts and that fos-transformed cells contain about 20 percent more 5-methylcytosine than normal fibroblasts. Transfection of the gene encoding Dnmt1 induced morphological transformation, whereas inhibition of dnmt1 expression or activity resulted in reversion of fos transformation. Inhibition of histone deacetylase, which associates with methylated DNA, also caused reversion. These results suggest that fos may transform cells through alterations in DNA methylation and in histone deacetylation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bakin, A V -- Curran, T -- P30 CA21765/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1999 Jan 15;283(5400):387-90.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Developmental Neurobiology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9888853" target="_blank"〉PubMed〈/a〉
    Keywords: 5-Methylcytosine ; Acetylation ; Animals ; Cell Size ; *Cell Transformation, Neoplastic ; Cytosine/analogs & derivatives/metabolism ; DNA (Cytosine-5-)-Methyltransferase/genetics/*metabolism ; DNA Methylation ; Enzyme Inhibitors/pharmacology ; Gene Expression Regulation, Neoplastic ; *Genes, fos ; Histone Deacetylase Inhibitors ; Histones/metabolism ; Hydroxamic Acids/pharmacology ; Proto-Oncogene Proteins c-fos/*metabolism ; Rats ; Transcription, Genetic ; Transfection
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 11
    facet.materialart.
    Unknown
    Pigment epithelium-derived factor: a potent inhibitor of angiogenesis (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-07-10
    Description: In the absence of disease, the vasculature of the mammalian eye is quiescent, in part because of the action of angiogenic inhibitors that prevent vessels from invading the cornea and vitreous. Here, an inhibitor responsible for the avascularity of these ocular compartments is identified as pigment epithelium-derived factor (PEDF), a protein previously shown to have neurotrophic activity. The amount of inhibitory PEDF produced by retinal cells was positively correlated with oxygen concentrations, suggesting that its loss plays a permissive role in ischemia-driven retinal neovascularization. These results suggest that PEDF may be of therapeutic use, especially in retinopathies where pathological neovascularization compromises vision and leads to blindness.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dawson, D W -- Volpert, O V -- Gillis, P -- Crawford, S E -- Xu, H -- Benedict, W -- Bouck, N P -- New York, N.Y. -- Science. 1999 Jul 9;285(5425):245-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology-Immunology, Department of Pathology, Robert H. Lurie Comprehensive Cancer Center, Northwestern University Medical School, Chicago, IL 60611, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10398599" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Newborn ; Antibodies/immunology ; Cattle ; Cells, Cultured ; Chemotaxis/drug effects ; Culture Media, Conditioned ; Endothelial Growth Factors/metabolism ; Endothelium, Vascular/cytology/drug effects/physiology ; Eye/blood supply ; *Eye Proteins ; Humans ; Lymphokines/metabolism ; Mice ; Neovascularization, Pathologic/*drug therapy/metabolism/pathology ; Neovascularization, Physiologic/*drug effects ; *Nerve Growth Factors ; Oxygen/physiology ; Proteins/genetics/immunology/*pharmacology/*physiology ; RNA, Messenger/genetics/metabolism ; Rats ; Retina/*metabolism/pathology ; Retinal Neovascularization/*drug therapy ; Retinal Vessels/growth & development ; Serpins/genetics/immunology/*pharmacology/*physiology ; Tumor Cells, Cultured ; Vascular Endothelial Growth Factor A ; Vascular Endothelial Growth Factors
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 12
    facet.materialart.
    Unknown
    Focal adhesion motility revealed in stationary fibroblasts (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-11-05
    Description: Focal adhesions (FAs) are clustered integrins and associated proteins that mediate cell adhesion and signaling. A green fluorescent protein-beta1 integrin chimera was used to label FAs in living cells. In stationary cells, FAs were highly motile, moving linearly for several plaque lengths toward the cell center. FA motility was independent of cell density and resulted from contraction of associated actin fibers. In migrating cells, FAs were stationary and only moved in the tail. FA motility in stationary cells suggests that cell movement may be regulated by a clutch-like mechanism by which the affinity of integrins to substrate may be altered in response to migratory cues.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smilenov, L B -- Mikhailov, A -- Pelham, R J -- Marcantonio, E E -- Gundersen, G G -- GM42026/GM/NIGMS NIH HHS/ -- GM44585/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1999 Nov 5;286(5442):1172-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology, Columbia University, New York, NY 10032, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10550057" target="_blank"〉PubMed〈/a〉
    Keywords: 3T3 Cells ; Actins/physiology ; Animals ; Antigens, CD29/*metabolism ; *Cell Adhesion ; Cell Count ; Cell Line ; *Cell Movement ; Fibroblasts/*cytology/metabolism ; Fluorescence ; Green Fluorescent Proteins ; Luminescent Proteins ; Mice ; Microscopy, Interference ; Rats ; Recombinant Fusion Proteins/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 13
    facet.materialart.
    Unknown
    Blockade of NMDA receptors and apoptotic neurodegeneration in the developing brain (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-01-05
    Description: Programmed cell death (apoptosis) occurs during normal development of the central nervous system. However, the mechanisms that determine which neurons will succumb to apoptosis are poorly understood. Blockade of N-methyl-D-aspartate (NMDA) glutamate receptors for only a few hours during late fetal or early neonatal life triggered widespread apoptotic neurodegeneration in the developing rat brain, suggesting that the excitatory neurotransmitter glutamate, acting at NMDA receptors, controls neuronal survival. These findings may have relevance to human neurodevelopmental disorders involving prenatal (drug-abusing mothers) or postnatal (pediatric anesthesia) exposure to drugs that block NMDA receptors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ikonomidou, C -- Bosch, F -- Miksa, M -- Bittigau, P -- Vockler, J -- Dikranian, K -- Tenkova, T I -- Stefovska, V -- Turski, L -- Olney, J W -- AG 11355/AG/NIA NIH HHS/ -- DA 05072/DA/NIDA NIH HHS/ -- MH 38894/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1999 Jan 1;283(5398):70-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pediatric Neurology, Charite-Virchow Clinics, Humboldt University, Augustenburger Platz 1, 13353 Berlin, Germany. hrissanthi.ikonomidou@charite.de〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9872743" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Apoptosis ; Brain/*cytology/drug effects/embryology/growth & development ; Calcium Channel Blockers/pharmacology ; Dizocilpine Maleate/pharmacology ; Dopamine Antagonists/pharmacology ; Dose-Response Relationship, Drug ; Excitatory Amino Acid Antagonists/pharmacology ; Fetus ; Haloperidol/pharmacology ; Immunohistochemistry ; In Situ Nick-End Labeling ; Microscopy, Electron ; Muscarinic Antagonists/pharmacology ; *Nerve Degeneration ; Neurons/*cytology/drug effects/metabolism ; Quinoxalines/pharmacology ; Rats ; Receptors, N-Methyl-D-Aspartate/*antagonists & inhibitors/metabolism ; Scopolamine Hydrobromide/pharmacology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 14
    facet.materialart.
    Unknown
    Building neural representations of habits (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-11-27
    Description: Memories for habits and skills ("implicit or procedural memory") and memories for facts ("explicit or episodic memory") are built up in different brain systems and are vulnerable to different neurodegenerative disorders in humans. So that the striatum-based mechanisms underlying habit formation could be studied, chronic recordings from ensembles of striatal neurons were made with multiple tetrodes as rats learned a T-maze procedural task. Large and widely distributed changes in the neuronal activity patterns occurred in the sensorimotor striatum during behavioral acquisition, culminating in task-related activity emphasizing the beginning and end of the automatized procedure. The new ensemble patterns remained stable during weeks of subsequent performance of the same task. These results suggest that the encoding of action in the sensorimotor striatum undergoes dynamic reorganization as habit learning proceeds.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jog, M S -- Kubota, Y -- Connolly, C I -- Hillegaart, V -- Graybiel, A M -- R03 MH57878/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1999 Nov 26;286(5445):1745-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉London Health Sciences Center, London, Ontario N6A 5A5, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10576743" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Animals ; Behavior, Animal ; Brain Mapping ; Corpus Striatum/*physiology ; Electrodes, Implanted ; Evoked Potentials ; *Habits ; Locomotion ; *Maze Learning ; Memory/physiology ; Motor Activity ; Neurons/physiology ; Rats ; Reaction Time
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 15
    facet.materialart.
    Unknown
    Cell survival promoted by the Ras-MAPK signaling pathway by transcription-dependent and -independent mechanisms (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-11-13
    Description: A mechanism by which the Ras-mitogen-activated protein kinase (MAPK) signaling pathway mediates growth factor-dependent cell survival was characterized. The MAPK-activated kinases, the Rsks, catalyzed the phosphorylation of the pro-apoptotic protein BAD at serine 112 both in vitro and in vivo. The Rsk-induced phosphorylation of BAD at serine 112 suppressed BAD-mediated apoptosis in neurons. Rsks also are known to phosphorylate the transcription factor CREB (cAMP response element-binding protein) at serine 133. Activated CREB promoted cell survival, and inhibition of CREB phosphorylation at serine 133 triggered apoptosis. These findings suggest that the MAPK signaling pathway promotes cell survival by a dual mechanism comprising the posttranslational modification and inactivation of a component of the cell death machinery and the increased transcription of pro-survival genes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bonni, A -- Brunet, A -- West, A E -- Datta, S R -- Takasu, M A -- Greenberg, M E -- NIHP30-HD18655/HD/NICHD NIH HHS/ -- P01 HD 24926/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1999 Nov 12;286(5443):1358-62.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Neuroscience, Children's Hospital, and Department of Neurobiology, Harvard Medical School, 300 Longwood Avenue, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10558990" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Apoptosis ; Brain-Derived Neurotrophic Factor/pharmacology ; Carrier Proteins/genetics/metabolism ; *Cell Survival ; Cells, Cultured ; Cerebellum/cytology ; Cyclic AMP Response Element-Binding Protein/metabolism ; Enzyme Activation ; Enzyme Inhibitors/pharmacology ; Flavonoids/pharmacology ; Insulin-Like Growth Factor I/pharmacology ; MAP Kinase Kinase 1 ; *MAP Kinase Signaling System ; Mitogen-Activated Protein Kinase Kinases/antagonists & inhibitors/metabolism ; Mitogen-Activated Protein Kinases/antagonists & inhibitors/metabolism ; Mutation ; Neurons/*cytology/metabolism ; Phosphorylation ; Phosphoserine/metabolism ; *Protein-Serine-Threonine Kinases ; Rats ; Rats, Long-Evans ; Recombinant Fusion Proteins/metabolism ; Ribosomal Protein S6 Kinases/genetics/*metabolism ; *Transcription, Genetic ; Transfection ; bcl-Associated Death Protein ; ras Proteins/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 16
    facet.materialart.
    Unknown
    Dissecting dendrite dynamics (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-04-17
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smith, S J -- New York, N.Y. -- Science. 1999 Mar 19;283(5409):1860-1.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, CA 94305, USA. sjsmith@leland.stanford.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10206891" target="_blank"〉PubMed〈/a〉
    Keywords: 2-Amino-5-phosphonovalerate/pharmacology ; Action Potentials ; Animals ; Dendrites/*physiology/ultrastructure ; Excitatory Amino Acid Antagonists/pharmacology ; Glutamic Acid/metabolism ; Hippocampus/cytology ; Microscopy, Fluorescence ; Neurons/physiology/ultrastructure ; Pseudopodia/*physiology/ultrastructure ; Rats ; Receptors, N-Methyl-D-Aspartate/*physiology ; Synapses/*physiology/ultrastructure ; Synaptic Membranes/physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 17
    facet.materialart.
    Unknown
    The role of local actin instability in axon formation (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-03-19
    Description: The role of localized instability of the actin network in specifying axonal fate was examined with the use of rat hippocampal neurons in culture. During normal neuronal development, actin dynamics and instability polarized to a single growth cone before axon formation. Consistently, global application of actin-depolymerizing drugs and of the Rho-signaling inactivator toxin B to nonpolarized cells produced neurons with multiple axons. Moreover, disruption of the actin network in one individual growth cone induced its neurite to become the axon. Thus, local instability of the actin network restricted to a single growth cone is a physiological signal specifying neuronal polarization.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bradke, F -- Dotti, C G -- New York, N.Y. -- Science. 1999 Mar 19;283(5409):1931-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉European Molecular Biology Laboratory, Cell Biology Programme, Meyerhofstrasse 1, 69012 Heidelberg, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10082468" target="_blank"〉PubMed〈/a〉
    Keywords: Actins/metabolism/*physiology ; Animals ; Axons/*physiology/ultrastructure ; *Bacterial Proteins ; Bacterial Toxins/pharmacology ; Bicyclo Compounds, Heterocyclic/pharmacology ; Cell Polarity ; Cells, Cultured ; Cytochalasin D/pharmacology ; GTP Phosphohydrolases/antagonists & inhibitors/metabolism ; Growth Cones/drug effects/*physiology/ultrastructure ; Hippocampus ; Microtubules/physiology/ultrastructure ; Neurites/*physiology/ultrastructure ; Phenotype ; Pseudopodia/drug effects/ultrastructure ; Rats ; Signal Transduction ; Thiazoles/pharmacology ; Thiazolidines
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 18
    facet.materialart.
    Unknown
    Precisely localized LTD in the neocortex revealed by infrared-guided laser stimulation (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-03
    Description: In a direct approach to elucidate the origin of long-term depression (LTD), glutamate was applied onto dendrites of neurons in rat neocortical slices. An infrared-guided laser stimulation was used to release glutamate from caged glutamate in the focal spot of an ultraviolet laser. A burst of light flashes caused an LTD-like depression of glutamate receptor responses, which was highly confined to the region of "tetanic" stimulation (〈10 micrometers). A similar depression of glutamate receptor responses was observed during LTD of synaptic transmission. A spatially highly specific postsynaptic mechanism can account for the LTD induced by glutamate release.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dodt, H -- Eder, M -- Frick, A -- Zieglgansberger, W -- New York, N.Y. -- Science. 1999 Oct 1;286(5437):110-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Max-Planck-Institute of Psychiatry, Kraepelinstrasse 2, 80804 Munich, Germany. dodt@mpipsykl.mpg.de〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10506556" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Dizocilpine Maleate/pharmacology ; Electric Stimulation ; Excitatory Amino Acid Antagonists/pharmacology ; Excitatory Postsynaptic Potentials ; Glutamates/pharmacology ; Glutamic Acid/metabolism ; In Vitro Techniques ; Infrared Rays ; Lasers ; Microscopy, Video ; Neocortex/cytology/*physiology ; *Neuronal Plasticity ; Patch-Clamp Techniques ; Photolysis ; Pyramidal Cells/*physiology ; Rats ; Rats, Sprague-Dawley ; Receptors, Glutamate/*metabolism ; Receptors, N-Methyl-D-Aspartate/antagonists & inhibitors/metabolism ; Synapses/*physiology ; *Synaptic Transmission
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 19
    facet.materialart.
    Unknown
    Transmission of chronic nociception by spinal neurons expressing the substance P receptor (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-11-24
    Description: Substance P receptor (SPR)-expressing spinal neurons were ablated with the selective cytotoxin substance P-saporin. Loss of these neurons resulted in a reduction of thermal hyperalgesia and mechanical allodynia associated with persistent neuropathic and inflammatory pain states. This loss appeared to be permanent. Responses to mildly painful stimuli and morphine analgesia were unaffected by this treatment. These results identify a target for treating persistent pain and suggest that the small population of SPR-expressing neurons in the dorsal horn of the spinal cord plays a pivotal role in the generation and maintenance of chronic neuropathic and inflammatory pain.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nichols, M L -- Allen, B J -- Rogers, S D -- Ghilardi, J R -- Honore, P -- Luger, N M -- Finke, M P -- Li, J -- Lappi, D A -- Simone, D A -- Mantyh, P W -- 23970/PHS HHS/ -- 31223/PHS HHS/ -- DEO 7288/DE/NIDCR NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1999 Nov 19;286(5444):1558-61.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Preventive Sciences, University of Minnesota, Minneapolis, MN 55455, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10567262" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Dose-Response Relationship, Drug ; Ganglia, Spinal/drug effects/physiology ; *Immunotoxins ; Inflammation/physiopathology ; Ligation ; *N-Glycosyl Hydrolases ; Neuralgia/drug therapy/physiopathology ; Pain/*drug therapy/*physiopathology ; Plant Proteins/administration & dosage/*pharmacology ; Posterior Horn Cells/drug effects/*physiology ; Rats ; Receptors, Neurokinin-1/*metabolism ; Ribosome Inactivating Proteins, Type 1 ; Spinal Nerves ; Substance P/administration & dosage/*pharmacology ; Time Factors
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 20
    facet.materialart.
    Unknown
    Dynamic control of CaMKII translocation and localization in hippocampal neurons by NMDA receptor stimulation (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-04-02
    Description: Calcium-calmodulin-dependent protein kinase II (CaMKII) is thought to increase synaptic strength by phosphorylating postsynaptic density (PSD) ion channels and signaling proteins. It is shown that N-methyl-D-aspartate (NMDA) receptor stimulation reversibly translocates green fluorescent protein-tagged CaMKII from an F-actin-bound to a PSD-bound state. The translocation time was controlled by the ratio of expressed beta-CaMKII to alpha-CaMKII isoforms. Although F-actin dissociation into the cytosol required autophosphorylation of or calcium-calmodulin binding to beta-CaMKII, PSD translocation required binding of calcium-calmodulin to either the alpha- or beta-CaMKII subunits. Autophosphorylation of CaMKII indirectly prolongs its PSD localization by increasing the calmodulin-binding affinity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shen, K -- Meyer, T -- GM-48113/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1999 Apr 2;284(5411):162-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell Biology and Department of Pharmacology and Cancer Biology, Box 3709, Duke University Medical Center, Durham, NC 27710, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10102820" target="_blank"〉PubMed〈/a〉
    Keywords: Actins/metabolism ; Animals ; Calcium/pharmacology ; Calcium-Calmodulin-Dependent Protein Kinase Type 2 ; Calcium-Calmodulin-Dependent Protein Kinases/*metabolism ; Cells, Cultured ; Cytosol/metabolism ; Dendrites/*enzymology ; Electric Stimulation ; Glutamic Acid/pharmacology ; Green Fluorescent Proteins ; Hippocampus/cytology/*enzymology ; Isoenzymes/metabolism ; Luminescent Proteins ; Microscopy, Fluorescence ; Nerve Tissue Proteins/analysis ; Neurons/*enzymology ; Phosphorylation ; Rats ; Receptors, N-Methyl-D-Aspartate/*metabolism ; Synapses/*enzymology ; Tumor Cells, Cultured
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 21
    facet.materialart.
    Unknown
    Stem cells as potential nerve therapy (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-08-24
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Steghaus-Kovac, S -- New York, N.Y. -- Science. 1999 Jul 30;285(5428):650-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10454911" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bioethics ; Diffuse Cerebral Sclerosis of Schilder/*therapy ; Embryo, Mammalian/cytology ; Financing, Government ; Germany ; Humans ; Mice ; Myelin Sheath/*physiology ; Oligodendroglia/*cytology/physiology/transplantation ; Rats ; Research Support as Topic ; Spinal Cord ; Stem Cells/*cytology/physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 22
    facet.materialart.
    Unknown
    PEG antibodies (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-11-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Peters, R -- Sikorsky, R -- New York, N.Y. -- Science. 1999 Oct 15;286(5439):434.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10577206" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Binding Sites, Antibody ; Biological Availability ; Half-Life ; Immunoglobulin Fab Fragments/*immunology/*metabolism ; Male ; Polyethylene Glycols/*metabolism ; Rats ; Rats, Wistar
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 23
    facet.materialart.
    Unknown
    Regulation of myosin phosphatase by a specific interaction with cGMP- dependent protein kinase Ialpha (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-11-24
    Description: Contraction and relaxation of smooth muscle are regulated by myosin light-chain kinase and myosin phosphatase through phosphorylation and dephosphorylation of myosin light chains. Cyclic guanosine monophosphate (cGMP)-dependent protein kinase Ialpha (cGKIalpha) mediates physiologic relaxation of vascular smooth muscle in response to nitric oxide and cGMP. It is shown here that cGKIalpha is targeted to the smooth muscle cell contractile apparatus by a leucine zipper interaction with the myosin-binding subunit (MBS) of myosin phosphatase. Uncoupling of the cGKIalpha-MBS interaction prevents cGMP-dependent dephosphorylation of myosin light chain, demonstrating that this interaction is essential to the regulation of vascular smooth muscle cell tone.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Surks, H K -- Mochizuki, N -- Kasai, Y -- Georgescu, S P -- Tang, K M -- Ito, M -- Lincoln, T M -- Mendelsohn, M E -- HL09330/HL/NHLBI NIH HHS/ -- HL55309/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1999 Nov 19;286(5444):1583-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Molecular Cardiology Research Institute and Cardiology Division, Department of Medicine, Tufts University School of Medicine and New England Medical Center, Boston, MA 02111, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10567269" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Motifs ; Amino Acid Substitution ; Animals ; Cells, Cultured ; Cyclic GMP-Dependent Protein Kinase Type I ; Cyclic GMP-Dependent Protein Kinases/chemistry/genetics/*metabolism ; Histones/metabolism ; Humans ; Isoenzymes/chemistry/metabolism ; Leucine Zippers ; Muscle Contraction ; Muscle Relaxation ; Muscle, Smooth, Vascular/*enzymology/physiology ; Mutagenesis, Site-Directed ; Myosin Light Chains/*metabolism ; Myosin-Light-Chain Phosphatase ; Phosphoprotein Phosphatases/chemistry/*metabolism ; Phosphorylation ; Precipitin Tests ; Rats ; Recombinant Fusion Proteins/metabolism ; Substrate Specificity ; Transfection ; Two-Hybrid System Techniques
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 24
    facet.materialart.
    Unknown
    Potential target found for antimetastasis drugs (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-07-31
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Finkel, E -- New York, N.Y. -- Science. 1999 Jul 2;285(5424):33-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10428697" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antineoplastic Agents/therapeutic use ; Clinical Trials as Topic ; Cloning, Molecular ; *Glucuronidase ; Glycoside Hydrolases/*antagonists & inhibitors/*genetics/isolation & ; purification/metabolism ; Humans ; Mice ; Neoplasm Metastasis/*prevention & control ; Rats ; Tumor Cells, Cultured
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 25
    facet.materialart.
    Unknown
    Mapping smells in the brain (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-08-14
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barinaga, M -- New York, N.Y. -- Science. 1999 Jul 23;285(5427):508.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10447477" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain Mapping ; Diagnostic Imaging ; Light ; Mice ; *Odors ; Olfactory Bulb/*physiology ; Olfactory Receptor Neurons/physiology ; Rats ; Receptors, Odorant/*physiology ; Smell/*physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 26
    facet.materialart.
    Unknown
    Two-metal-Ion catalysis in adenylyl cyclase (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-07-31
    Description: Adenylyl cyclase (AC) converts adenosine triphosphate (ATP) to cyclic adenosine monophosphate, a ubiquitous second messenger that regulates many cellular functions. Recent structural studies have revealed much about the structure and function of mammalian AC but have not fully defined its active site or catalytic mechanism. Four crystal structures were determined of the catalytic domains of AC in complex with two different ATP analogs and various divalent metal ions. These structures provide a model for the enzyme-substrate complex and conclusively demonstrate that two metal ions bind in the active site. The similarity of the active site of AC to those of DNA polymerases suggests that the enzymes catalyze phosphoryl transfer by the same two-metal-ion mechanism and likely have evolved from a common ancestor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tesmer, J J -- Sunahara, R K -- Johnson, R A -- Gosselin, G -- Gilman, A G -- Sprang, S R -- DK38828/DK/NIDDK NIH HHS/ -- DK46371/DK/NIDDK NIH HHS/ -- GM34497/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1999 Jul 30;285(5428):756-60.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Department of Biochemistry, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75235-9050, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10427002" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphate/metabolism ; Adenylyl Cyclase Inhibitors ; Adenylyl Cyclases/chemistry/genetics/*metabolism ; Animals ; Aspartic Acid/metabolism ; Binding Sites ; Catalysis ; Crystallography, X-Ray ; Deoxyadenine Nucleotides/metabolism/pharmacology ; Dideoxynucleotides ; Dimerization ; Enzyme Inhibitors/metabolism ; Hydrogen Bonding ; Ligands ; Magnesium/*metabolism ; Manganese/*metabolism ; Models, Molecular ; Mutation ; Protein Conformation ; Protein Folding ; Rats ; Thionucleotides/metabolism/pharmacology ; Zinc/*metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 27
    facet.materialart.
    Unknown
    Vessel cooption, regression, and growth in tumors mediated by angiopoietins and VEGF (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-06-18
    Description: In contrast with the prevailing view that most tumors and metastases begin as avascular masses, evidence is presented here that a subset of tumors instead initially grows by coopting existing host vessels. This coopted host vasculature does not immediately undergo angiogenesis to support the tumor but instead regresses, leading to a secondarily avascular tumor and massive tumor cell loss. Ultimately, however, the remaining tumor is rescued by robust angiogenesis at the tumor margin. The expression patterns of the angiogenic antagonist angiopoietin-2 and of pro-angiogenic vascular endothelial growth factor (VEGF) suggest that these proteins may be critical regulators of this balance between vascular regression and growth.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Holash, J -- Maisonpierre, P C -- Compton, D -- Boland, P -- Alexander, C R -- Zagzag, D -- Yancopoulos, G D -- Wiegand, S J -- New York, N.Y. -- Science. 1999 Jun 18;284(5422):1994-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Regeneron Pharmaceuticals, 777 Old Saw Mill River Road, Tarrytown, NY 10591, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10373119" target="_blank"〉PubMed〈/a〉
    Keywords: Adenocarcinoma/blood supply/pathology ; Angiopoietin-1 ; Angiopoietin-2 ; Animals ; Apoptosis ; Blood Vessels/pathology ; Endothelial Growth Factors/genetics/*physiology ; Endothelium, Vascular/pathology/physiology ; Glioblastoma/blood supply/pathology ; Glioma/blood supply/pathology ; In Situ Hybridization ; Lymphokines/genetics/*physiology ; Male ; Membrane Glycoproteins/genetics/*physiology ; Mice ; Mice, Inbred C57BL ; Muscle, Smooth, Vascular/pathology/physiology ; Neoplasm Transplantation ; Neoplasms, Experimental/*blood supply/*pathology ; *Neovascularization, Pathologic ; Proteins/genetics/*physiology ; Rats ; Rats, Sprague-Dawley ; Up-Regulation ; Vascular Endothelial Growth Factor A ; Vascular Endothelial Growth Factors
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 28
    facet.materialart.
    Unknown
    New clues to how neurons strengthen their connections (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-07-03
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barinaga, M -- New York, N.Y. -- Science. 1999 Jun 11;284(5421):1755-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10391789" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/cytology/physiology ; Cells, Cultured ; Dendrites/physiology/ultrastructure ; Glutamic Acid/*physiology ; Long-Term Potentiation/*physiology ; Mice ; Neurons/physiology ; Rats ; Receptors, AMPA/*physiology ; Receptors, N-Methyl-D-Aspartate/*physiology ; Synapses/*physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 29
    facet.materialart.
    Unknown
    Odor response properties of rat olfactory receptor neurons (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-06-26
    Description: Molecular biology studies of olfaction have identified a multigene family of molecular receptors that are likely to be involved in odor transduction mechanisms. However, because previous functional data on peripheral coding were mainly collected from inferior vertebrates, it has been difficult to document the degree of specificity of odor interaction mechanisms. As a matter of fact, studies of the functional expression of olfactory receptors have not demonstrated the low or high specificity of olfactory receptors. In this study, the selectivity of olfactory receptor neurons was investigated in the rat at the cellular level under physiological conditions by unitary extracellular recordings. Individual olfactory receptor neurons were broadly responsive to qualitatively distinct odor compounds. We conclude that peripheral coding is based on activated arrays of olfactory receptor cells with overlapping tuning profiles.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Duchamp-Viret, P -- Chaput, M A -- Duchamp, A -- New York, N.Y. -- Science. 1999 Jun 25;284(5423):2171-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratoire de Neurosciences et Systemes Sensoriels, CNRS, UMR, Universite Claude Bernard, 43 boulevard du 11 novembre 1918, 69622 Villeurbanne cedex, France. pduchamp@olfac.univ-lyon1.fr〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10381881" target="_blank"〉PubMed〈/a〉
    Keywords: Acetophenones ; Action Potentials ; Animals ; Anisoles ; Benzaldehydes ; Camphor ; Cyclohexenes ; *Odors ; Olfactory Receptor Neurons/*physiology ; Pentanols ; Rats ; Rats, Wistar ; Receptors, Odorant/genetics/*physiology ; Terpenes
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 30
    facet.materialart.
    Unknown
    Dual function of the selenoprotein PHGPx during sperm maturation (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-08-28
    Description: The selenoprotein phospholipid hydroperoxide glutathione peroxidase (PHGPx) changes its physical characteristics and biological functions during sperm maturation. PHGPx exists as a soluble peroxidase in spermatids but persists in mature spermatozoa as an enzymatically inactive, oxidatively cross-linked, insoluble protein. In the midpiece of mature spermatozoa, PHGPx protein represents at least 50 percent of the capsule material that embeds the helix of mitochondria. The role of PHGPx as a structural protein may explain the mechanical instability of the mitochondrial midpiece that is observed in selenium deficiency.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ursini, F -- Heim, S -- Kiess, M -- Maiorino, M -- Roveri, A -- Wissing, J -- Flohe, L -- New York, N.Y. -- Science. 1999 Aug 27;285(5432):1393-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Dipartmento di Chimica Biologica, Universita di Padova, Viale G. Colombo 3, I-35121 Padova, Italy.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10464096" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Electrophoresis, Gel, Two-Dimensional ; Electrophoresis, Polyacrylamide Gel ; Glutathione Peroxidase/chemistry/isolation & purification/*physiology ; Infertility, Male/metabolism ; Male ; Mitochondria/chemistry/enzymology ; Oxidation-Reduction ; Proteins/chemistry/isolation & purification/*physiology ; Rats ; Rats, Wistar ; Selenium/deficiency/*physiology ; Selenoproteins ; Solubility ; Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization ; Spermatids/chemistry/enzymology ; *Spermatogenesis ; Spermatozoa/chemistry/enzymology/*physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 31
    facet.materialart.
    Unknown
    UDP-GlcNAc 2-epimerase: a regulator of cell surface sialylation (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-05-21
    Description: Modification of cell surface molecules with sialic acid is crucial for their function in many biological processes, including cell adhesion and signal transduction. Uridine diphosphate-N-acetylglucosamine 2-epimerase (UDP-GlcNAc 2-epimerase) is an enzyme that catalyzes an early, rate-limiting step in the sialic acid biosynthetic pathway. UDP-GlcNAc 2-epimerase was found to be a major determinant of cell surface sialylation in human hematopoietic cell lines and a critical regulator of the function of specific cell surface adhesion molecules.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Keppler, O T -- Hinderlich, S -- Langner, J -- Schwartz-Albiez, R -- Reutter, W -- Pawlita, M -- New York, N.Y. -- Science. 1999 May 21;284(5418):1372-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Applied Tumor Virology Program, Tumor Immunology Program, Deutsches Krebsforschungszentrum, Im Neuenheimer Feld 280, D-69120 Heidelberg, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10334995" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD/metabolism ; Antigens, CD14/biosynthesis ; Antigens, CD15/biosynthesis ; Antigens, Differentiation, B-Lymphocyte/metabolism ; Carbohydrate Epimerases/genetics/metabolism ; Cell Adhesion Molecules/metabolism ; Cell Membrane/*metabolism ; Culture Media ; *Escherichia coli Proteins ; Glycoconjugates/*metabolism ; HL-60 Cells ; Histocompatibility Antigens Class I/biosynthesis ; Humans ; Lectins/metabolism ; Oligosaccharides/biosynthesis ; Rats ; Sialic Acid Binding Ig-like Lectin 2 ; Sialic Acids/*biosynthesis ; Transcription, Genetic ; Transfection ; Tumor Cells, Cultured
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 32
    facet.materialart.
    Unknown
    A nonpeptidyl mimic of superoxide dismutase with therapeutic activity in rats (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-09
    Description: Many human diseases are associated with the overproduction of oxygen free radicals that inflict cell damage. A manganese(II) complex with a bis(cyclohexylpyridine)-substituted macrocyclic ligand (M40403) was designed to be a functional mimic of the superoxide dismutase (SOD) enzymes that normally remove these radicals. M40403 had high catalytic SOD activity and was chemically and biologically stable in vivo. Injection of M40403 into rat models of inflammation and ischemia-reperfusion injury protected the animals against tissue damage. Such mimics may result in better clinical therapies for diseases mediated by superoxide radicals.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Salvemini, D -- Wang, Z Q -- Zweier, J L -- Samouilov, A -- Macarthur, H -- Misko, T P -- Currie, M G -- Cuzzocrea, S -- Sikorski, J A -- Riley, D P -- New York, N.Y. -- Science. 1999 Oct 8;286(5438):304-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉MetaPhore Pharmaceuticals, 1910 Innerbelt Business Center Drive, St. Louis, MO 63114, USA. dsalvemini@metaphore.com〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10514375" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anti-Inflammatory Agents, Non-Steroidal/chemical ; synthesis/chemistry/metabolism/*therapeutic use ; Cytoprotection ; Dinoprostone/metabolism ; Dose-Response Relationship, Drug ; Drug Design ; Drug Stability ; Inflammation/*drug therapy ; Interleukin-1/metabolism ; L-Lactate Dehydrogenase/metabolism ; Male ; Manganese ; Molecular Mimicry ; Neutrophils/drug effects ; Organometallic Compounds/chemical synthesis/chemistry/metabolism/*toxicity ; Rats ; Rats, Sprague-Dawley ; Reperfusion Injury/*drug therapy ; Splanchnic Circulation ; *Superoxide Dismutase/metabolism ; Superoxides/*metabolism ; Time Factors ; Tumor Necrosis Factor-alpha/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 33
    facet.materialart.
    Unknown
    Cholesterol-lowering drugs may boost bones (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vogel, G -- New York, N.Y. -- Science. 1999 Dec 3;286(5446):1825-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10610568" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anticholesteremic Agents/*pharmacology ; Bone Density/*drug effects ; Bone Morphogenetic Protein 2 ; Bone Morphogenetic Proteins/biosynthesis ; Clinical Trials as Topic ; Female ; Humans ; Hydroxymethylglutaryl-CoA Reductase Inhibitors/*pharmacology ; Lovastatin/*pharmacology ; Mice ; Osteogenesis/*drug effects ; Osteoporosis/drug therapy ; Rats ; Simvastatin/pharmacology ; *Transforming Growth Factor beta
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 34
    facet.materialart.
    Unknown
    Modulation of respiratory frequency by peptidergic input to rhythmogenic neurons in the preBotzinger complex (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-11-24
    Description: Neurokinin-1 receptor (NK1R) and mu-opioid receptor (muOR) agonists affected respiratory rhythm when injected directly into the preBotzinger Complex (preBotC), the hypothesized site for respiratory rhythmogenesis in mammals. These effects were mediated by actions on preBotC rhythmogenic neurons. The distribution of NK1R+ neurons anatomically defined the preBotC. Type 1 neurons in the preBotC, which have rhythmogenic properties, expressed both NK1Rs and muORs, whereas type 2 neurons expressed only NK1Rs. These findings suggest that the preBotC is a definable anatomic structure with unique physiological function and that a subpopulation of neurons expressing both NK1Rs and muORs generate respiratory rhythm and modulate respiratory frequency.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2811082/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2811082/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gray, P A -- Rekling, J C -- Bocchiaro, C M -- Feldman, J L -- HL37941/HL/NHLBI NIH HHS/ -- HL40959/HL/NHLBI NIH HHS/ -- R01 HL040959/HL/NHLBI NIH HHS/ -- R01 HL040959-12/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1999 Nov 19;286(5444):1566-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurobiology, University of California Los Angeles, Box 951763, Los Angeles, CA 90095-1763, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10567264" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Enkephalin, Ala(2)-MePhe(4)-Gly(5)-/pharmacology ; Female ; In Vitro Techniques ; Medulla Oblongata/cytology/drug effects/*physiology ; Mice ; Mice, Inbred BALB C ; Neurons/chemistry/drug effects/*physiology ; Rats ; Rats, Sprague-Dawley ; Receptors, GABA-B/analysis/physiology ; Receptors, Neurokinin-1/agonists/analysis/*physiology ; Receptors, Opioid, mu/agonists/analysis/*physiology ; Respiratory Mechanics/drug effects/*physiology ; Substance P/pharmacology ; Synaptic Transmission/drug effects
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 35
    facet.materialart.
    Unknown
    Ca2+-induced apoptosis through calcineurin dephosphorylation of BAD (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-04-09
    Description: The Ca2+-activated protein phosphatase calcineurin induces apoptosis, but the mechanism is unknown. Calcineurin was found to dephosphorylate BAD, a pro-apoptotic member of the Bcl-2 family, thus enhancing BAD heterodimerization with Bcl-xL and promoting apoptosis. The Ca2+-induced dephosphorylation of BAD correlated with its dissociation from 14-3-3 in the cytosol and translocation to mitochondria where Bcl-xL resides. In hippocampal neurons, L-glutamate, an inducer of Ca2+ influx and calcineurin activation, triggered mitochondrial targeting of BAD and apoptosis, which were both suppressible by coexpression of a dominant-inhibitory mutant of calcineurin or pharmacological inhibitors of this phosphatase. Thus, a Ca2+-inducible mechanism for apoptosis induction operates by regulating BAD phosphorylation and localization in cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wang, H G -- Pathan, N -- Ethell, I M -- Krajewski, S -- Yamaguchi, Y -- Shibasaki, F -- McKeon, F -- Bobo, T -- Franke, T F -- Reed, J C -- AG-1593/AG/NIA NIH HHS/ -- CA-69381/CA/NCI NIH HHS/ -- HD25938/HD/NICHD NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1999 Apr 9;284(5412):339-43.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Burnham Institute, 10901 North Torrey Pines Road, La Jolla, CA 92037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10195903" target="_blank"〉PubMed〈/a〉
    Keywords: 14-3-3 Proteins ; Animals ; *Apoptosis ; Calcineurin/genetics/*metabolism ; Calcineurin Inhibitors ; Calcium/*metabolism/pharmacology ; Carrier Proteins/chemistry/*metabolism ; Cell Line ; Cells, Cultured ; Dimerization ; Enzyme Inhibitors/pharmacology ; Glutamic Acid/pharmacology ; Hippocampus/cytology ; Humans ; Mitochondria/metabolism ; Neurons/cytology/metabolism ; Phosphorylation ; Protein-Serine-Threonine Kinases/metabolism ; Proteins/metabolism ; Proto-Oncogene Proteins c-bcl-2/metabolism ; Rats ; Recombinant Fusion Proteins/metabolism ; Transfection ; *Tyrosine 3-Monooxygenase ; bcl-Associated Death Protein ; bcl-X Protein
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 36
    facet.materialart.
    Unknown
    Stimulation of bone formation in vitro and in rodents by statins (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-03
    Description: Osteoporosis and other diseases of bone loss are a major public health problem. Here it is shown that the statins, drugs widely used for lowering serum cholesterol, also enhance new bone formation in vitro and in rodents. This effect was associated with increased expression of the bone morphogenetic protein-2 (BMP-2) gene in bone cells. Lovastatin and simvastatin increased bone formation when injected subcutaneously over the calvaria of mice and increased cancellous bone volume when orally administered to rats. Thus, in appropriate doses, statins may have therapeutic applications for the treatment of osteoporosis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mundy, G -- Garrett, R -- Harris, S -- Chan, J -- Chen, D -- Rossini, G -- Boyce, B -- Zhao, M -- Gutierrez, G -- New York, N.Y. -- Science. 1999 Dec 3;286(5446):1946-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉OsteoScreen, 2040 Babcock Road, San Antonio, TX 78229, USA. mundy@uthscsa.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10583956" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bone Density/*drug effects ; Bone Morphogenetic Protein 2 ; Bone Morphogenetic Proteins/biosynthesis/genetics/pharmacology ; Cell Line ; Female ; Fibroblast Growth Factor 1 ; Fibroblast Growth Factor 2/pharmacology ; Humans ; Hydroxymethylglutaryl-CoA Reductase Inhibitors/pharmacology ; Lovastatin/*pharmacology ; Male ; Mice ; Mice, Inbred ICR ; Organ Culture Techniques ; Osteoblasts/*drug effects/metabolism ; Osteoclasts/drug effects ; Osteogenesis/*drug effects ; Osteoporosis/drug therapy ; Ovariectomy ; Promoter Regions, Genetic/drug effects ; Rats ; Recombinant Proteins/pharmacology ; Simvastatin/*pharmacology ; Skull ; Transfection ; *Transforming Growth Factor beta
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 37
    facet.materialart.
    Unknown
    Role of heteromer formation in GABAB receptor function (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-01-05
    Description: Recently, GBR1, a seven-transmembrane domain protein with high affinity for gamma-aminobutyric acid (GABA)B receptor antagonists, was identified. Here, a GBR1-related protein, GBR2, was shown to be coexpressed with GBR1 in many brain regions and to interact with it through a short domain in the carboxyl-terminal cytoplasmic tail. Heterologously expressed GBR2 mediated inhibition of adenylyl cyclase; however, inwardly rectifying potassium channels were activated by GABAB receptor agonists only upon coexpression with GBR1 and GBR2. Thus, the interaction of these receptors appears to be crucial for important physiological effects of GABA and provides a mechanism in receptor signaling pathways that involve a heterotrimeric GTP-binding protein.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kuner, R -- Kohr, G -- Grunewald, S -- Eisenhardt, G -- Bach, A -- Kornau, H C -- New York, N.Y. -- Science. 1999 Jan 1;283(5398):74-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉BASF-LYNX Bioscience AG, Department of Neuroscience, Im Neuenheimer Feld 515, D-69120 Heidelberg, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9872744" target="_blank"〉PubMed〈/a〉
    Keywords: Adenylyl Cyclase Inhibitors ; Amino Acid Sequence ; Animals ; Brain/*metabolism ; Cell Line ; Cyclic AMP/metabolism ; Dimerization ; G Protein-Coupled Inwardly-Rectifying Potassium Channels ; GABA-B Receptor Agonists ; Humans ; In Situ Hybridization ; Molecular Sequence Data ; Neurons/metabolism ; Potassium/metabolism ; Potassium Channels/metabolism ; *Potassium Channels, Inwardly Rectifying ; RNA, Messenger/genetics/metabolism ; Rats ; Receptors, GABA/*chemistry/*metabolism ; Receptors, GABA-B/*chemistry/*metabolism ; Recombinant Fusion Proteins/chemistry/metabolism ; Sequence Alignment
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 38
    facet.materialart.
    Unknown
    Probing alcoholism's 'dark side' (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-09-25
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Service, R F -- New York, N.Y. -- Science. 1999 Sep 3;285(5433):1473.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10498528" target="_blank"〉PubMed〈/a〉
    Keywords: Alcoholism/cerebrospinal fluid/*metabolism ; Animals ; Brain/*metabolism ; Corticotropin-Releasing Hormone/cerebrospinal fluid/*metabolism ; Dopamine/metabolism ; Humans ; Rats ; Substance Withdrawal Syndrome/metabolism/prevention & control
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 39
    facet.materialart.
    Unknown
    Meeting. American Chemical Society. Raising a glass to health and nanotubes (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-16
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Service, R F -- New York, N.Y. -- Science. 1999 Sep 24;285(5436):2053, 2055.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10523196" target="_blank"〉PubMed〈/a〉
    Keywords: Acetaldehyde/*metabolism ; Animals ; Carbon ; Electronics ; Ethanol/metabolism ; Glucose/chemistry/metabolism ; Glycosylation End Products, Advanced/*metabolism ; Hemoglobin A, Glycosylated/chemistry ; Humans ; Rats
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 40
    facet.materialart.
    Unknown
    Long-term depression in hippocampal interneurons: joint requirement for pre- and postsynaptic events (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-08-28
    Description: Long-term depression (LTD) is a well-known form of synaptic plasticity of principal neurons in the mammalian brain. Whether such changes occur in interneurons is still controversial. CA3 hippocampal interneurons expressing Ca2+-permeable AMPA receptors exhibited LTD after tetanic stimulation of CA3 excitatory inputs. LTD was independent of NMDA receptors and required both Ca2+ influx through postsynaptic AMPA receptors and activation of presynaptic mGluR7-like receptors. These results point to the capability of interneurons to undergo plastic changes of synaptic strength through joint activation of pre- and postsynaptic glutamate receptors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Laezza, F -- Doherty, J J -- Dingledine, R -- New York, N.Y. -- Science. 1999 Aug 27;285(5432):1411-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Neuroscience Graduate Program, Department of Pharmacology, Emory University School of Medicine, Atlanta, GA 30322, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10464102" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Calcium/metabolism ; Egtazic Acid/analogs & derivatives/pharmacology ; Electric Stimulation ; Hippocampus/cytology/*physiology ; In Vitro Techniques ; Interneurons/*physiology ; Male ; *Neuronal Plasticity ; Patch-Clamp Techniques ; Pyramidal Cells/physiology ; Rats ; Rats, Sprague-Dawley ; Receptors, AMPA/drug effects/*metabolism ; Receptors, Metabotropic Glutamate/drug effects/*metabolism ; Synapses/*physiology ; Synaptic Transmission ; Tetany
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 41
    facet.materialart.
    Unknown
    Modulation of brain reward circuitry by leptin (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-30
    Description: Leptin, a hormone secreted by fat cells, suppresses food intake and promotes weight loss. To assess the action of this hormone on brain reward circuitry, changes in the rewarding effect of lateral hypothalamic stimulation were measured after leptin administration. At five stimulation sites near the fornix, the effectiveness of the rewarding electrical stimulation was enhanced by chronic food restriction and attenuated by intracerebroventricular infusion of leptin. In contrast, the rewarding effect of stimulating neighboring sites was insensitive to chronic food restriction and was enhanced by leptin in three of four cases. These opposing effects of leptin may mirror complementary changes in the rewarding effects of feeding and of competing behaviors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fulton, S -- Woodside, B -- Shizgal, P -- New York, N.Y. -- Science. 2000 Jan 7;287(5450):125-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Studies in Behavioural Neurobiology, Concordia University, Montreal, QC, H3G 1M8, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10615045" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Electric Stimulation ; Energy Metabolism ; Feeding Behavior ; Food Deprivation/*physiology ; Hypothalamic Area, Lateral/drug effects/*physiology ; Injections, Intraventricular ; Leptin/administration & dosage/*pharmacology ; Male ; Neurons/physiology ; Neuropeptides/physiology ; Rats ; Rats, Long-Evans ; Recombinant Proteins/administration & dosage/pharmacology ; *Reward ; Self Stimulation/physiology ; Time Factors
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 42
    facet.materialart.
    Unknown
    Regulation of NMDA receptors by an associated phosphatase-kinase signaling complex (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-07-03
    Description: Regulation of N-methyl-D-aspartate (NMDA) receptor activity by kinases and phosphatases contributes to the modulation of synaptic transmission. Targeting of these enzymes near the substrate is proposed to enhance phosphorylation-dependent modulation. Yotiao, an NMDA receptor-associated protein, bound the type I protein phosphatase (PP1) and the adenosine 3',5'-monophosphate (cAMP)-dependent protein kinase (PKA) holoenzyme. Anchored PP1 was active, limiting channel activity, whereas PKA activation overcame constitutive PP1 activity and conferred rapid enhancement of NMDA receptor currents. Hence, yotiao is a scaffold protein that physically attaches PP1 and PKA to NMDA receptors to regulate channel activity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Westphal, R S -- Tavalin, S J -- Lin, J W -- Alto, N M -- Fraser, I D -- Langeberg, L K -- Sheng, M -- Scott, J D -- F32 NS010202/NS/NINDS NIH HHS/ -- GM 48231/GM/NIGMS NIH HHS/ -- NS10202/NS/NINDS NIH HHS/ -- NS10543/NS/NINDS NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1999 Jul 2;285(5424):93-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Vollum Institute, Oregon Health Sciences University, 3181 S.W. Sam Jackson Road, Portland, OR 97201, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10390370" target="_blank"〉PubMed〈/a〉
    Keywords: A Kinase Anchor Proteins ; *Adaptor Proteins, Signal Transducing ; Amino Acid Sequence ; Animals ; Binding Sites ; Carrier Proteins/*metabolism ; Cell Line ; Cyclic AMP/analogs & derivatives/pharmacology ; Cyclic AMP-Dependent Protein Kinases/*metabolism ; Cytoskeletal Proteins/*metabolism ; Enzyme Inhibitors/pharmacology ; Holoenzymes/metabolism ; Humans ; Molecular Sequence Data ; Okadaic Acid/pharmacology ; Patch-Clamp Techniques ; Peptide Fragments/pharmacology ; Phosphoprotein Phosphatases/*metabolism ; Phosphorylation ; Rats ; Receptors, N-Methyl-D-Aspartate/*metabolism ; Recombinant Fusion Proteins/metabolism ; Signal Transduction ; Thionucleotides/pharmacology ; Transfection
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 43
    facet.materialart.
    Unknown
    American Chemical Society. Chemists mix it up in California (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-05-08
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Service, R F -- New York, N.Y. -- Science. 1999 Apr 9;284(5412):243-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10232968" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biocompatible Materials ; *Biomedical Engineering ; Brain/*drug effects/metabolism ; Caffeine/administration & dosage/adverse effects/*pharmacology ; Catalysis ; Genetic Engineering ; Genetic Therapy/*methods ; Humans ; Polycarboxylate Cement/chemical synthesis ; Polymers/chemical synthesis ; Rats ; Substance-Related Disorders/*etiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 44
    facet.materialart.
    Unknown
    Enhanced cortical dopamine output and antipsychotic-like effects of raclopride by alpha2 adrenoceptor blockade (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-03
    Description: Clozapine exerts superior clinical efficacy and markedly enhances cortical dopamine output compared with classical antipsychotic drugs. Here the alpha2 adrenoceptor antagonist idazoxan was administered to rats alone or in combination with the D2/3 dopamine receptor antagonist raclopride. Dopamine efflux in the medial prefrontal cortex and conditioned avoidance responding were analyzed. Idazoxan selectively potentiated the cortical output of dopamine and augmented the suppression of conditioned avoidance responding induced by raclopride. These results challenge basic assumptions underlying the dopamine hypothesis of schizophrenia and provide insight into clozapine's mode of action.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hertel, P -- Fagerquist, M V -- Svensson, T H -- New York, N.Y. -- Science. 1999 Oct 1;286(5437):105-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physiology and Pharmacology, Section of Neuropsychopharmacology, Karolinska Institute, S-171 77 Stockholm, Sweden.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10506554" target="_blank"〉PubMed〈/a〉
    Keywords: *Adrenergic alpha-2 Receptor Antagonists ; Adrenergic alpha-Antagonists/pharmacology ; Animals ; Antipsychotic Agents/*pharmacology ; Avoidance Learning/drug effects ; Catalepsy/chemically induced ; Conditioning (Psychology) ; Corpus Striatum/drug effects/metabolism ; Dopamine/*metabolism ; Dopamine Antagonists/*pharmacology ; Dose-Response Relationship, Drug ; Drug Synergism ; Idazoxan/*pharmacology ; Nucleus Accumbens/drug effects/metabolism ; Prefrontal Cortex/*drug effects/metabolism ; Raclopride ; Rats ; Receptors, Adrenergic, alpha-2/metabolism ; Salicylamides/*pharmacology ; Schizophrenia/drug therapy/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 45
    facet.materialart.
    Unknown
    Neuronal activity-dependent cell survival mediated by transcription factor MEF2 (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-26
    Description: During mammalian development, electrical activity promotes the calcium-dependent survival of neurons that have made appropriate synaptic connections. However, the mechanisms by which calcium mediates neuronal survival during development are not well characterized. A transcription-dependent mechanism was identified by which calcium influx into neurons promoted cell survival. The transcription factor MEF2 was selectively expressed in newly generated postmitotic neurons and was required for the survival of these neurons. Calcium influx into cerebellar granule neurons led to activation of p38 mitogen-activated protein kinase-dependent phosphorylation and activation of MEF2. Once activated, MEF2 regulated neuronal survival by stimulating MEF2-dependent gene transcription. These findings demonstrate that MEF2 is a calcium-regulated transcription factor and define a function for MEF2 during nervous system development that is distinct from previously well-characterized functions of MEF2 during muscle differentiation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mao, Z -- Bonni, A -- Xia, F -- Nadal-Vicens, M -- Greenberg, M E -- 5T32NS07112/NS/NINDS NIH HHS/ -- NS28829/NS/NINDS NIH HHS/ -- P30-HD18655/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1999 Oct 22;286(5440):785-90.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Neuroscience, Department of Neurology, Children's Hospital and Department of Neurobiology, Harvard Medical School, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10531066" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Apoptosis ; Calcium/metabolism ; Calcium Channels, L-Type/metabolism ; Cell Differentiation ; Cell Survival ; Cells, Cultured ; Cerebellum/cytology/metabolism ; Cerebral Cortex/cytology/embryology/metabolism ; DNA-Binding Proteins/genetics/*metabolism ; Dimerization ; Immunohistochemistry ; MEF2 Transcription Factors ; Mitogen-Activated Protein Kinases/metabolism ; Mitosis ; Mutation ; Myogenic Regulatory Factors ; Neurons/*cytology/*metabolism ; Phosphorylation ; Rats ; Signal Transduction ; Transcription Factors/genetics/*metabolism ; *Transcription, Genetic ; Transfection ; p38 Mitogen-Activated Protein Kinases
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 46
    facet.materialart.
    Unknown
    Preliminary data touch off genetic food fight (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-03-13
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Enserink, M -- New York, N.Y. -- Science. 1999 Feb 19;283(5405):1094-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10075564" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biotechnology ; Crops, Agricultural/*adverse effects ; Digestive System/pathology ; Food Technology ; Great Britain ; *Growth ; *Immunity ; Infection/pathology ; Lectins/genetics ; Plant Lectins ; Plants, Genetically Modified/*adverse effects ; Rats ; Solanum tuberosum/adverse effects/*genetics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 47
    facet.materialart.
    Unknown
    Dracula's wish (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-06-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Peters, R -- Sikorski, R -- New York, N.Y. -- Science. 1999 May 21;284(5418):1294.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10383310" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anticoagulants/*chemical synthesis/chemistry/pharmacology ; Antithrombins/metabolism ; Bleeding Time ; Heparin/chemistry/metabolism/*pharmacology ; Humans ; Molecular Mimicry ; Platelet Activation/drug effects ; Polysaccharides/*chemical synthesis/chemistry/pharmacology ; Rats ; Thrombin/*antagonists & inhibitors/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 48
    facet.materialart.
    Unknown
    Bone marrow as a potential source of hepatic oval cells (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-05-15
    Description: Bone marrow stem cells develop into hematopoietic and mesenchymal lineages but have not been known to participate in production of hepatocytes, biliary cells, or oval cells during liver regeneration. Cross-sex or cross-strain bone marrow and whole liver transplantation were used to trace the origin of the repopulating liver cells. Transplanted rats were treated with 2-acetylaminofluorene, to block hepatocyte proliferation, and then hepatic injury, to induce oval cell proliferation. Markers for Y chromosome, dipeptidyl peptidase IV enzyme, and L21-6 antigen were used to identify liver cells of bone marrow origin. From these cells, a proportion of the regenerated hepatic cells were shown to be donor-derived. Thus, a stem cell associated with the bone marrow has epithelial cell lineage capability.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Petersen, B E -- Bowen, W C -- Patrene, K D -- Mars, W M -- Sullivan, A K -- Murase, N -- Boggs, S S -- Greenberger, J S -- Goff, J P -- New York, N.Y. -- Science. 1999 May 14;284(5417):1168-70.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15261, USA. bryon+@pitt.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10325227" target="_blank"〉PubMed〈/a〉
    Keywords: 2-Acetylaminofluorene/pharmacology ; Animals ; Bone Marrow Cells/*cytology ; Bone Marrow Transplantation ; Carbon Tetrachloride/pharmacology ; Cell Differentiation ; Cell Division ; DNA-Binding Proteins/genetics ; Dipeptidyl Peptidase 4/metabolism ; Epithelial Cells/cytology ; Female ; Hematopoietic Stem Cells/cytology ; In Situ Hybridization ; Liver/*cytology/drug effects/physiology ; *Liver Regeneration ; Liver Transplantation ; Male ; *Nuclear Proteins ; Polymerase Chain Reaction ; Rats ; Rats, Inbred F344 ; Rats, Inbred Lew ; Sex-Determining Region Y Protein ; Stem Cells/*cytology ; *Transcription Factors ; Y Chromosome
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 49
    facet.materialart.
    Unknown
    Redefining rats, mice, and birds. AAA (American Association of Anatomists) Public Affairs Committee (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-04-24
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Besharse, J C -- Carlson, B M -- Jenkins, D P -- Lester, D S -- Olds, J L -- Satir, P -- New York, N.Y. -- Science. 1999 Apr 2;284(5411):49-50.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10215528" target="_blank"〉PubMed〈/a〉
    Keywords: Animal Rights/*legislation & jurisprudence ; Animal Welfare/*legislation & jurisprudence ; Animals ; *Animals, Laboratory ; Birds ; Mice ; Rats ; Research ; Societies, Scientific ; United States ; United States Department of Agriculture/legislation & jurisprudence
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 50
    facet.materialart.
    Unknown
    Turning thoughts into actions (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-11-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barinaga, M -- New York, N.Y. -- Science. 1999 Oct 29;286(5441):888-90.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10577236" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/*physiology ; Computer Systems ; Cybernetics ; Electrodes, Implanted ; Electroencephalography ; Female ; Humans ; Male ; Models, Neurological ; Motivation ; Motor Cortex/physiology ; Paralysis/*rehabilitation ; Prostheses and Implants ; Psychomotor Performance/*physiology ; Rats ; *Robotics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 51
    facet.materialart.
    Unknown
    Learning visualised, on the double (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barinaga, M -- New York, N.Y. -- Science. 1999 Nov 26;286(5445):1661.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10610556" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/physiology/*ultrastructure ; Calcium/metabolism ; Image Processing, Computer-Assisted ; In Vitro Techniques ; Learning/*physiology ; *Long-Term Potentiation ; Microscopy, Electron ; Rats ; Synapses/*ultrastructure ; Synaptic Transmission
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 52
    facet.materialart.
    Unknown
    Immortal time: circadian clock properties of rat suprachiasmatic cell lines (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-01-29
    Description: Cell lines derived from the rat suprachiasmatic nucleus (SCN) were screened for circadian clock properties distinctive of the SCN in situ. Immortalized SCN cells generated robust rhythms in uptake of the metabolic marker 2-deoxyglucose and in their content of neurotrophins. The phase relationship between these rhythms in vitro was identical to that exhibited by the SCN in vivo. Transplantation of SCN cell lines, but not mesencephalic or fibroblast lines, restored the circadian activity rhythm in arrhythmic, SCN-lesioned rats. Thus, distinctive oscillator, pacemaker, and clock properties of the SCN are not only retained but also maintained in an appropriate circadian phase relationship by immortalized SCN progenitors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Earnest, D J -- Liang, F Q -- Ratcliff, M -- Cassone, V M -- NS35822/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1999 Jan 29;283(5402):693-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Human Anatomy and Medical Neurobiology, College of Medicine, Texas A&M University Health Science Center, College Station, TX 77843-1114, USA. dearnest@tamu.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9924030" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biological Clocks ; Brain-Derived Neurotrophic Factor/metabolism ; Cell Line ; Cell Transplantation ; *Circadian Rhythm ; Deoxyglucose/metabolism ; Glucose-6-Phosphate/analogs & derivatives/metabolism ; Glycogen/metabolism ; Graft Survival ; Male ; Motor Activity ; Nerve Growth Factors/metabolism ; Neurons/metabolism/*physiology/transplantation ; Neurotrophin 3 ; Rats ; Rats, Sprague-Dawley ; Stem Cells/cytology/metabolism/*physiology ; Suprachiasmatic Nucleus/*cytology/metabolism/physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 53
    facet.materialart.
    Unknown
    Embryonic stem cell-derived glial precursors: a source of myelinating transplants (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-07-31
    Description: Self-renewing, totipotent embryonic stem (ES) cells may provide a virtually unlimited donor source for transplantation. A protocol that permits the in vitro generation of precursors for oligodendrocytes and astrocytes from ES cells was devised. Transplantation in a rat model of a human myelin disease shows that these ES cell-derived precursors interact with host neurons and efficiently myelinate axons in brain and spinal cord. Thus, ES cells can serve as a valuable source of cell type-specific somatic precursors for neural transplantation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brustle, O -- Jones, K N -- Learish, R D -- Karram, K -- Choudhary, K -- Wiestler, O D -- Duncan, I D -- McKay, R D -- NS33710/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1999 Jul 30;285(5428):754-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neuropathology, University of Bonn Medical Center, Sigmund-Freud-Strasse 25, 53105 Bonn, Germany. brustle@uni-bonn.de〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10427001" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Astrocytes/*cytology ; Brain/embryology/metabolism ; Cell Differentiation ; Cell Line ; Cell Movement ; Cerebral Ventricles/embryology/surgery ; Diffuse Cerebral Sclerosis of Schilder/genetics/*therapy ; Embryo, Mammalian/cytology ; Growth Substances/pharmacology ; Humans ; Male ; Mice ; Myelin Basic Protein/biosynthesis ; Myelin Proteolipid Protein/biosynthesis/genetics ; Myelin Sheath/*physiology ; Oligodendroglia/*cytology/metabolism/*transplantation/ultrastructure ; Rats ; Spinal Cord ; Stem Cell Transplantation ; Stem Cells/*cytology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 54
    facet.materialart.
    Unknown
    Rbx1, a component of the VHL tumor suppressor complex and SCF ubiquitin ligase (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-04-24
    Description: The von Hippel-Lindau (VHL) tumor suppressor gene is mutated in most human kidney cancers. The VHL protein is part of a complex that includes Elongin B, Elongin C, and Cullin-2, proteins associated with transcriptional elongation and ubiquitination. Here it is shown that the endogenous VHL complex in rat liver also includes Rbx1, an evolutionarily conserved protein that contains a RING-H2 fingerlike motif and that interacts with Cullins. The yeast homolog of Rbx1 is a subunit and potent activator of the Cdc53-containing SCFCdc4 ubiquitin ligase required for ubiquitination of the cyclin-dependent kinase inhibitor Sic1 and for the G1 to S cell cycle transition. These findings provide a further link between VHL and the cellular ubiquitination machinery.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kamura, T -- Koepp, D M -- Conrad, M N -- Skowyra, D -- Moreland, R J -- Iliopoulos, O -- Lane, W S -- Kaelin, W G Jr -- Elledge, S J -- Conaway, R C -- Harper, J W -- Conaway, J W -- AG-11085/AG/NIA NIH HHS/ -- GM41628/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1999 Apr 23;284(5414):657-61.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Program in Molecular and Cell Biology, Oklahoma Medical Research Foundation, Oklahoma City, OK 73104, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10213691" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Carrier Proteins/chemistry/genetics/*metabolism ; Cell Cycle ; Cell Cycle Proteins/metabolism ; Cell Line ; *Cullin Proteins ; Cyclin-Dependent Kinase Inhibitor Proteins ; *F-Box Proteins ; Fungal Proteins/metabolism ; *Ligases ; Liver ; Male ; Molecular Sequence Data ; Peptide Synthases/*metabolism ; Proteins/*metabolism ; Rats ; Rats, Sprague-Dawley ; Recombinant Fusion Proteins/metabolism ; S-Phase Kinase-Associated Proteins ; SKP Cullin F-Box Protein Ligases ; Saccharomyces cerevisiae/metabolism ; *Saccharomyces cerevisiae Proteins ; Sequence Alignment ; Transcription Factors/metabolism ; *Tumor Suppressor Proteins ; *Ubiquitin-Protein Ligases ; Ubiquitins/*metabolism ; Von Hippel-Lindau Tumor Suppressor Protein
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 55
    facet.materialart.
    Unknown
    Nonproteolytic neuroprotection by human recombinant tissue plasminogen activator (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-04-24
    Description: Human recombinant tissue plasminogen activator (tPA) may benefit ischemic stroke patients by dissolving clots. However, independent of thrombolysis, tPA may also have deleterious effects on neurons by promoting excitotoxicity. Zinc neurotoxicity has been shown to be an additional key mechanism in brain injuries. Hence, if tPA affects zinc neurotoxicity, this may provide additional insights into its effect on neuronal death. Independent of its proteolytic action, tPA markedly attenuated zinc-induced cell death in cortical culture, and, when injected into cerebrospinal fluid, also reduced kainate seizure-induced hippocampal neuronal death in adult rats.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kim, Y H -- Park, J H -- Hong, S H -- Koh, J Y -- New York, N.Y. -- Science. 1999 Apr 23;284(5414):647-50.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉National Creative Research Initiative Center for the Study of Central Nervous System Zinc and Department of Neurology, University of Ulsan College of Medicine, 388-1 Poongnap-Dong Songpa-Gu, Seoul 138-736, Korea.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10213688" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Death/drug effects ; Cells, Cultured ; Cerebral Cortex/cytology ; *Cytoprotection ; Fibrinolysin/pharmacology ; Hippocampus/pathology ; Humans ; Kainic Acid/pharmacology ; Male ; Mice ; N-Methylaspartate/pharmacology ; Neurons/*cytology/drug effects ; Neuroprotective Agents/*pharmacology ; Oxidative Stress ; Rats ; Rats, Sprague-Dawley ; Recombinant Proteins/cerebrospinal fluid/pharmacology ; Seizures/chemically induced/pathology ; Tissue Plasminogen Activator/cerebrospinal fluid/*pharmacology ; Zinc/metabolism/*toxicity
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 56
    facet.materialart.
    Unknown
    Differential stimulation of PKC phosphorylation of potassium channels by ZIP1 and ZIP2 (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-09-08
    Description: Targeting of protein modification enzymes is a key biochemical step to achieve specific and effective posttranslational modifications. Two alternatively spliced ZIP1 and ZIP2 proteins are described, which bind to both Kvbeta2 subunits of potassium channel and protein kinase C (PKC) zeta, thereby acting as a physical link in the assembly of PKCzeta-ZIP-potassium channel complexes. ZIP1 and ZIP2 differentially stimulate phosphorylation of Kvbeta2 by PKCzeta. They also interact to form heteromultimers, which allows for a hybrid stimulatory activity to PKCzeta. Finally, ZIP1 and ZIP2 coexist in the same cell type and are elevated differentially by neurotrophic factors. These results provide a mechanism for specificity and regulation of PKCzeta-targeted phosphorylation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gong, J -- Xu, J -- Bezanilla, M -- van Huizen, R -- Derin, R -- Li, M -- NS33324/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1999 Sep 3;285(5433):1565-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physiology, The Johns Hopkins University School of Medicine, 725 North Wolfe Street, Baltimore, MD 21205, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10477520" target="_blank"〉PubMed〈/a〉
    Keywords: Alternative Splicing ; Amino Acid Sequence ; Animals ; Binding Sites ; Carrier Proteins/chemistry/genetics/*metabolism ; Cell Line ; Cerebellum/metabolism ; DNA, Complementary ; Isoenzymes/metabolism ; Molecular Sequence Data ; Myelin Basic Protein/metabolism ; Nerve Growth Factors/pharmacology ; Neurons/*metabolism ; Phosphorylation ; Potassium Channels/*metabolism ; Protein Kinase C/*metabolism ; Pyramidal Cells/metabolism ; RNA, Messenger/genetics/metabolism ; Rats ; Rats, Sprague-Dawley ; Recombinant Fusion Proteins/chemistry/metabolism ; Substrate Specificity ; Transfection
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 57
    facet.materialart.
    Unknown
    Rapid dendritic morphogenesis in CA1 hippocampal dendrites induced by synaptic activity (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-03-19
    Description: Activity shapes the structure of neurons and their circuits. Two-photon imaging of CA1 neurons expressing enhanced green fluorescent protein in developing hippocampal slices from rat brains was used to characterize dendritic morphogenesis in response to synaptic activity. High-frequency focal synaptic stimulation induced a period (longer than 30 minutes) of enhanced growth of small filopodia-like protrusions (typically less than 5 micrometers long). Synaptically evoked growth was long-lasting and localized to dendritic regions close (less than 50 micrometers) to the stimulating electrode and was prevented by blockade of N-methyl-D-aspartate receptors. Thus, synaptic activation can produce rapid input-specific changes in dendritic structure. Such persistent structural changes could contribute to the development of neural circuitry.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Maletic-Savatic, M -- Malinow, R -- Svoboda, K -- New York, N.Y. -- Science. 1999 Mar 19;283(5409):1923-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10082466" target="_blank"〉PubMed〈/a〉
    Keywords: 2-Amino-5-phosphonovalerate/pharmacology ; Animals ; Culture Techniques ; Dendrites/drug effects/physiology/*ultrastructure ; Electric Stimulation ; Excitatory Amino Acid Antagonists/pharmacology ; Green Fluorescent Proteins ; Hippocampus/cytology ; Luminescent Proteins/genetics ; Microscopy/methods ; Morphogenesis/drug effects ; Pseudopodia/drug effects/physiology/*ultrastructure ; Pyramidal Cells/physiology/*ultrastructure/virology ; Rats ; Receptors, N-Methyl-D-Aspartate/antagonists & inhibitors/*physiology ; Sindbis Virus/genetics/physiology ; Synapses/*physiology/ultrastructure ; Synaptic Membranes/physiology ; Synaptic Transmission
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 58
    facet.materialart.
    Unknown
    Transgenic food debate. The Lancet scolded over Pusztai paper (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-11-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Enserink, M -- New York, N.Y. -- Science. 1999 Oct 22;286(5440):656.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10577214" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biotechnology ; Crops, Agricultural/*adverse effects/genetics ; Diet ; Genetic Engineering ; Intestinal Mucosa/pathology ; Lectins/genetics ; *Mannose-Binding Lectins ; *Peer Review, Research ; *Periodicals as Topic ; Plant Lectins ; Plants, Genetically Modified/*adverse effects ; Publishing ; Rats ; Solanum tuberosum/adverse effects/*genetics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 59
    facet.materialart.
    Unknown
    Testing the genetics of behavior in mice (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-16
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pohorecky, L A -- New York, N.Y. -- Science. 1999 Sep 24;285(5436):2067-8; author reply 2069-70.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10523200" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Laboratory ; *Behavior, Animal ; Confounding Factors (Epidemiology) ; Genetics, Behavioral/*methods ; Handling (Psychology) ; *Housing, Animal ; Mice ; Rats
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 60
    facet.materialart.
    Unknown
    Possible new anti-inflammatory agent (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-11-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Strauss, E -- New York, N.Y. -- Science. 1999 Oct 8;286(5438):209-10.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10577184" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anti-Inflammatory Agents, Non-Steroidal/chemical ; synthesis/chemistry/*pharmacology ; Computer Simulation ; *Drug Design ; Inflammation/drug therapy ; Intestines/blood supply ; Manganese ; Molecular Mimicry ; Organometallic Compounds/chemical synthesis/chemistry/*pharmacology ; Rats ; Reperfusion Injury/drug therapy ; *Superoxide Dismutase/metabolism ; Superoxides/*metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 61
    facet.materialart.
    Unknown
    Mediation by a CREB family transcription factor of NGF-dependent survival of sympathetic neurons (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-22
    Description: Nerve growth factor (NGF) and other neurotrophins support survival of neurons through processes that are incompletely understood. The transcription factor CREB is a critical mediator of NGF-dependent gene expression, but whether CREB family transcription factors regulate expression of genes that contribute to NGF-dependent survival of sympathetic neurons is unknown. CREB-mediated gene expression was both necessary for NGF-dependent survival and sufficient on its own to promote survival of sympathetic neurons. Moreover, expression of Bcl-2 was activated by NGF and other neurotrophins by a CREB-dependent transcriptional mechanism. Overexpression of Bcl-2 reduced the death-promoting effects of CREB inhibition. Together, these data support a model in which neurotrophins promote survival of neurons, in part through a mechanism involving CREB family transcription factor-dependent expression of genes encoding prosurvival factors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Riccio, A -- Ahn, S -- Davenport, C M -- Blendy, J A -- Ginty, D D -- NS34814-04/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1999 Dec 17;286(5448):2358-61.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neuroscience, The Johns Hopkins University School of Medicine, 725 North Wolfe Street, Baltimore, MD 21205-2185, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10600750" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Apoptosis ; Axons/drug effects/metabolism ; Brain-Derived Neurotrophic Factor/pharmacology ; Cell Nucleus/metabolism ; Cell Survival ; Cells, Cultured ; Cyclic AMP Response Element-Binding Protein/antagonists & inhibitors/*metabolism ; *Gene Expression Regulation ; Genes, bcl-2 ; Genetic Vectors ; Nerve Growth Factor/*pharmacology ; Neurons/*cytology/drug effects/metabolism ; PC12 Cells ; Promoter Regions, Genetic ; Proto-Oncogene Proteins c-bcl-2/genetics/metabolism ; Rats ; Recombinant Fusion Proteins/metabolism ; Signal Transduction ; Sympathetic Nervous System/*cytology/drug effects/metabolism ; Transfection
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 62
    facet.materialart.
    Unknown
    Nongenomic transmission across generations of maternal behavior and stress responses in the rat (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-11-05
    Description: In the rat, variations in maternal care appear to influence the development of behavioral and endocrine responses to stress in the offspring. The results of cross-fostering studies reported here provide evidence for (i) a causal relationship between maternal behavior and stress reactivity in the offspring and (ii) the transmission of such individual differences in maternal behavior from one generation of females to the next. Moreover, an environmental manipulation imposed during early development that alters maternal behavior can then affect the pattern of transmission in subsequent generations. Taken together, these findings indicate that variations in maternal care can serve as the basis for a nongenomic behavioral transmission of individual differences in stress reactivity across generations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Francis, D -- Diorio, J -- Liu, D -- Meaney, M J -- New York, N.Y. -- Science. 1999 Nov 5;286(5442):1155-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Developmental Neuroendocrinology Laboratory, Douglas Hospital Research Centre, Department of Psychiatry, McGill University, Montreal, H4H 1R3, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10550053" target="_blank"〉PubMed〈/a〉
    Keywords: Amygdala/metabolism ; Animals ; Brain/*metabolism ; Corticotropin-Releasing Hormone/*genetics/metabolism ; Female ; Gene Expression ; Handling (Psychology) ; Hippocampus/metabolism ; Male ; *Maternal Behavior ; Paraventricular Hypothalamic Nucleus/metabolism ; Rats ; Receptors, GABA-A/*genetics/metabolism ; Receptors, Glucocorticoid/*genetics/metabolism ; Stress, Physiological/genetics/*metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 63
    facet.materialart.
    Unknown
    Dirty transcripts from clean DNA (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-04-24
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bridges, B A -- New York, N.Y. -- Science. 1999 Apr 2;284(5411):62-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Medical Research Council Cell Mutation Unit, University of Sussex, Falmer, Brighton BN1 9RR, UK. b.a.bridges@sussex.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10215532" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Pair Mismatch ; *DNA Damage ; DNA Repair ; DNA, Bacterial/genetics ; Escherichia coli/*genetics ; Humans ; *Mutagenesis ; Neurons/metabolism ; Phenotype ; RNA, Bacterial/genetics ; RNA, Messenger/*genetics ; Rats ; Rats, Brattleboro ; Sequence Deletion ; Templates, Genetic ; *Transcription, Genetic ; Uracil/*metabolism ; Vasopressins/genetics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 64
    facet.materialart.
    Unknown
    Acute activation of Maxi-K channels (hSlo) by estradiol binding to the beta subunit (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-09-18
    Description: Maxi-K channels consist of a pore-forming alpha subunit and a regulatory beta subunit, which confers the channel with a higher Ca(2+) sensitivity. Estradiol bound to the beta subunit and activated the Maxi-K channel (hSlo) only when both alpha and beta subunits were present. This activation was independent of the generation of intracellular signals and could be triggered by estradiol conjugated to a membrane-impenetrable carrier protein. This study documents the direct interaction of a hormone with a voltage-gated channel subunit and provides the molecular mechanism for the modulation of vascular smooth muscle Maxi-K channels by estrogens.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Valverde, M A -- Rojas, P -- Amigo, J -- Cosmelli, D -- Orio, P -- Bahamonde, M I -- Mann, G E -- Vergara, C -- Latorre, R -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 1999 Sep 17;285(5435):1929-31.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Departament de Ciencies Experimentals i de la Salut, Universidad Pompeu Fabra, C/Doctor Aiguader 80, 08003 Barcelona, Spain. miguel.valverde@cexs.upf.es〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10489376" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cattle ; Cell Line ; Electrophysiology ; Estradiol/genetics/*metabolism ; Humans ; Large-Conductance Calcium-Activated Potassium Channel alpha Subunits ; Large-Conductance Calcium-Activated Potassium Channel beta Subunits ; Large-Conductance Calcium-Activated Potassium Channels ; Patch-Clamp Techniques ; Potassium Channels/*metabolism ; *Potassium Channels, Calcium-Activated ; Protein Binding ; RNA, Messenger ; Rats ; Xenopus laevis
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 65
    facet.materialart.
    Unknown
    Cutting back the calories (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gerhard, G S -- New York, N.Y. -- Science. 1999 Nov 26;286(5445):1679-80.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10610562" target="_blank"〉PubMed〈/a〉
    Keywords: Aging/*genetics ; Animals ; Cerebral Cortex/metabolism ; *Energy Intake ; Gene Expression ; *Gene Expression Profiling ; Mice ; Mice, Inbred C57BL ; Muscle, Skeletal/*metabolism ; Oligonucleotide Array Sequence Analysis ; Rats ; Research Design
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 66
    facet.materialart.
    Unknown
    Interaction of RAFT1 with gephyrin required for rapamycin-sensitive signaling (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-05-15
    Description: RAFT1 (rapamycin and FKBP12 target 1; also called FRAP or mTOR) is a member of the ATM (ataxia telangiectasia mutated)-related family of proteins and functions as the in vivo mediator of the effects of the immunosuppressant rapamycin and as an important regulator of messenger RNA translation. In mammalian cells RAFT1 interacted with gephyrin, a widely expressed protein necessary for the clustering of glycine receptors at the cell membrane of neurons. RAFT1 mutants that could not associate with gephyrin failed to signal to downstream molecules, including the p70 ribosomal S6 kinase and the eIF-4E binding protein, 4E-BP1. The interaction with gephyrin ascribes a function to the large amino-terminal region of an ATM-related protein and reveals a role in signal transduction for the clustering protein gephyrin.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sabatini, D M -- Barrow, R K -- Blackshaw, S -- Burnett, P E -- Lai, M M -- Field, M E -- Bahr, B A -- Kirsch, J -- Betz, H -- Snyder, S H -- DA-00074/DA/NIDA NIH HHS/ -- DA-00266/DA/NIDA NIH HHS/ -- GM-07309/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1999 May 14;284(5417):1161-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Johns Hopkins University School of Medicine, Department of Neuroscience, 725 North Wolfe Street, Baltimore, MD 21205, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10325225" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptor Proteins, Signal Transducing ; Amino Acid Sequence ; Animals ; Carrier Proteins/chemistry/genetics/*metabolism ; Cell Line ; Cell Membrane/metabolism ; Cytoplasm/metabolism ; Gene Expression ; HeLa Cells ; Humans ; Membrane Proteins/*metabolism ; Molecular Sequence Data ; Mutation ; Phosphoproteins/*metabolism ; Phosphorylation ; *Phosphotransferases (Alcohol Group Acceptor) ; Rats ; Receptors, Glycine/metabolism ; Repressor Proteins/metabolism ; Ribosomal Protein S6 Kinases/*metabolism ; *Signal Transduction ; Sirolimus/*pharmacology ; TOR Serine-Threonine Kinases
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 67
    Electronic Resource
    Electronic Resource
    Novel one-pot polymer syntheses based on dithiols obtained from a five-membered cyclic dithiocarbonate and diamines (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 1909-1915 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Novel one-pot syntheses of sulfur-containing polymers from a five-membered cyclic dithiocarbonate (5-phenoxymethyl-1,3-oxathiolane-2-thione (1)) and diamines were examined. Polydisulfides with M̄n 5400 ∼ 15800 were obtained in the oxidation polymerization of dithiols 2, which were obtained in situ by the reactions of 1 and diamines. When 1,12-dodecanediamine was employed, a polydisulfide with relatively high M̄n was obtained, while in the case of m-xylylenediamine, the polymerization was accompanied by intermolecular cyclization to give a polydisulfide with low M̄n. Polythiourethanes with M̄n 6500 ∼ 17200 were obtained in the polyaddition of 2 with 4,4′-methylenebis(phenyl isocyanate). The yields and M̄n values increase with increasing methylene chain length of 2. Polythioethers with M̄n 2600 ∼ 19900 were obtained by the polycondensations of 2 with α,α′-dibromo-p-xylene. The glass transition temperature (Tg) of the polymer decreases with increasing methylene chain length in the main chain.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 68
    Electronic Resource
    Electronic Resource
    Synthesis of novel oligomeric peroxides via condensation of dihydroperoxides with aromatic diols (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 1927-1933 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Novel oligoperoxides α-hydro-ω-hydroperoxyoligo(dioxydimethylmethylene-1,4-phenylene-dimethylmethylene) (BPB) (Tm = 143°C, Td = 176°C), α-hydro-ω-hydroxyoligo(dioxydimethylmethylene-1,4-phenylenedimethylmethylenedioxydimethylmethyleneethy lenedimethylmethylene) (EPB) (Tm = 100°C, Td = 175°C) and α-hydro-ω-hydroperoxyoligo(dimethylmethylene-2,6-naphthylenedimethylmethylene (NPN) (Tm = 137°C, Td = 177°C)), the products of condensation of tertiary diols with tertiary dihydroperoxides, were obtained. The structure of the oligoperoxides was confirmed by spectroscopic methods (IR, NMR). Their thermal properties were studied by differential scanning calorimetry (DSC), and the mechanism of the thermal decomposition of the oligomeric peroxides was proposed basing on the GC-MS analysis of the degradation products.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 69
    Electronic Resource
    Electronic Resource
    Liquid crystalline thermosets from triaromatic azomethine group containing diepoxides and 4,4′-methylenedianiline (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 1935-1938 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Five triaromatic azomethine-linked diepoxides have been cured by reaction with 4,4′-methyl-enedianiline (MDA) in a molar ratio epoxide/amine of 1:1 and 2:1. The influence of the structure of monomers, of the molar ratio epoxide/amine, and of the curing conditions on the formation of liquid crystalline networks was studied. Initially a decrease of the clearing temperature was caused by mixing with the nonmesogenic diamine. The clearing point of the mixture increased with conversion, and thermosets with a liquid crystal order of the monomers were obtained from the 2:1 combinations. Curing occurs in two stages as revealed by DSC: first epoxy/amine reaction occurs, and at higher temperature homopolymerisation of residual oxirane takes place. This is due to non-homogeneous melting of the diepoxides in dynamic curing.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 70
    Electronic Resource
    Electronic Resource
    Vinylic polymerization of bicyclo[2.2.1]hept-2-ene by Co(II)-catalysis (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 1951-1956 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The vinylic polymerization of bicyclo[2.2.1]hept-2-ene (norbornene) with Co(II) compounds, such as Co(II) stearate, substituted bis(1,3-diketo)cobalt(II), Co(dppe)Cl2, and the metallocene [η5-(C5Me5)Co-η2-Cl]2, in chlorobenzene activated with methylaluminoxane (MAO) is reported. MAO* synthesized by the hydrolysis of trimethylaluminium in chlorobenzene instead of toluene increases the catalytical activity strongly, and a turn over of 2.7 tons of poly(2,3-bicyclo[2.2.1]hept-2-ene) per mol cobalt per hour was achieved. The polymers obtained are amorphous (WAXS). They show weight-average molecular weights up to M̄w = 1.5 · 106 and are soluble in chlorobenzene, 1,2-dichlorobenzene, cyclohexane, and decahydronaphthalene.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 71
    Electronic Resource
    Electronic Resource
    Influence of batch reaction conditions on norbornene/ethylene copolymers made using C2v- and Cs-symmetric metallocene/MAO catalysts (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 1939-1942 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The norbornene/ethylene copolymerization was studied using C2v- and Cs-symmetric metallocene catalysts in the presence of methylaluminoxane as a cocatalyst. The batch reactions were carried out at four different temperatures copolymerizing a constant amount of ethylene with the appropriate amount of norbornene. The activity decreases for the Cp2ZrCl2 catalyst and increases to a constant level for the [Ph2C(Flu)(Cp)]ZrCl2 catalyst when the norbornene/ethylene ratio in the reaction increased. The highest activities and the highest norbornene contents in the copolymers were achieved using the [Ph2C(Flu)(Cp)]ZrCl2. The microstructure of the copolymer determined with 13C NMR was observed to depend on catalyst, temperature and monomer ratio. Cp2ZrCl2 produces more norbornene blocks as a function of norbornene content in the copolymer and longer norbornene sequences than [Ph2C(Flu)(Cp)]ZrCl2. The correlation between the increasing norbornene content in the copolymer and the increasing glass transition temperature is more obvious for [Ph2C(Flu)(Cp)]ZrCl2.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 72
    Electronic Resource
    Electronic Resource
    New azo-dye containing side group copolymethacrylates (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 1943-1949 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: A new type of side group copolymethacrylates was synthesized, characterized and tested with respect to its behavior on irradiation with an Ar+-laser beam. The side groups consist of methylene spacer units with different length and of three-ring mesogens with an ester group between the first and the second aromatic ring and on the other hand of two-ring mesogens with an azo-structure between the aromatic rings, respectively. The azochromophoric structure contains different substituents in the terminal aromatic ring. The homopolymers of the azo-dye containing monomers do not display liquid crystalline (lc) mesophases, but the three-ring mesogens induce lc-phases in opposition to the equimolaric copolymers with two-ring ester group mesogens. The lc phases are important for the stability of the recorded change of birefringence (photorecording process) which is influenced by irradiation of the polymers.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 73
    Electronic Resource
    Electronic Resource
    Miscibility of functionalized polyolefins with polyamide-6 as detected by solid-state NMR (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 1957-1963 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Solid-state NMR was used to investigate the miscibility of LLDPE/polyamide-6 blends. Two different blends B1 and B2, obtained with LLDPE only and with LLDPE functionalized with diethyl succinate, respectively, as well as their individual components, were characterized by means of 13C selective techniques. Measurement of 1H spin-lattice relaxation times in both laboratory and rotating frames allowed the miscibility at a molecular level to be investigated for both blends: in B1 the domains of the different components are on average larger than 100-200 Å, whereas in B2, where two different fractions could be separated on the basis of their solubility in heptane, the average linear dimensions of the insoluble fraction are between 20 and 200 Å.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 74
    Electronic Resource
    Electronic Resource
    Tetrahexylsexithiophene: crystal structure and molecular mechanics calculations (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 1973-1979 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The synthesis, crystal structure and detatiled molecular mechanics calculations, including crystal packing interactions, of tetrahexylsubstituted sexithienylene are presented. Unexpectedly the molecule, which arranges in the P-1 space group, displays no herringbone arrangement, thienylenic rings are far from coplanarity and the alkylic side chains present different conformations. Molecular mechanics fully accounts for these findings. From crystal packing computations it is derived that different arrangements are unable to lower the packing energy, due to the closeness of two alkyl chains on the same side of the thienylenic backbone, which prevents interspersion of non-parallel molecules.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 75
    Electronic Resource
    Electronic Resource
    Copolymerization of ethene with 1-hexene or 1-hexadecene over ethylene, dimethylsilylene and 1,4-butanediylsilylene bridged bis(indenyl) and bis(tetrahydroindenyl)zirconium dichlorides (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 1965-1972 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Ethene was copolymerized with 1-hexene and 1-hexadecene over five different homogeneous methylaluminoxane (MAO) activated racemic ansa-metallocene catalysts in order to study both the influence of the ligand (indenyl and tetrahydroindenyl) and the influence of the interannular bridge (ethylene, dimethylsilylene and 1,4-butanediylsilylene) on the copolymerization behaviour. Hydrogenation of the indenyl ligands was found to decrease comonomer content and molar mass of the copolymers. A similar tendency was observed for the ethylene bridge compared to the silylene bridges. The reasons for this behaviour are discussed and related to structural differences of the catalyst precursors. In addition a segregation fractionation technique was applied to study the chemical composition distribution (CCD) of the produced copolymers. Batchwise feed of comonomer resulted in a broad CCD. More homogeneous copolymers could be produced using partly continuous feed of comonomer.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 76
    Electronic Resource
    Electronic Resource
    4-[Diphenyl(trimethylsilyl)methyl]benzophenone as initiator in the photopolymerization of methyl methacrylate and styrenePartly presented at the 4th Greek Polymer Chemical Congress, Patras, November 1997, Greece. (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 1981-1987 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The polymerization of methyl methacrylate (MMA) and styrene (St) has been studied using 4-[diphenyl(trimethylsilyl)methyl]benzophenone 1 as photoinitiator. The polymerization follows a free radical mechanism; the polymerization rate increases linearly with the monomer concentration and was found to be proportional to the 0.33 and 1.40 power of the photoinitiator and the monomer (MMA) concentration, respectively. The overall activation energy in the case of MMA photopolymerization was calculated to be 25.0 kJ/mol. From 1H NMR studies it is concluded that the obtained polymers contain two different trimethylsilyl moieties, one at the head and the other at the tail of the polymer chain, showing primary termination reactions even at low initiator concentrations. The p-benzoyltrityl radical 1· is incorporated into the polymer chain to a very small extent, acting as a scavenger. This is also concluded by laser flash photolysis (LFP) and ESR spectroscopy measurements. A “living” character of the polymerization was observed only at very low initiator concentrations. The triplet state (31*) of the initiator was quenched by styrene, reducing its efficiency. The rate constant kq of the quenching process of 31* was measured by LFP (kq = 3.1 · 109 M-1 · S-1). The triplet state and the photodissociation efficiency of the initiator is unaffected by MMA at various concentrations.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 77
    Electronic Resource
    Electronic Resource
    Reactivity ratios and sequence determination of acrylonitrile/hexyl methacrylate copolymers by one and two dimensional NMR spectroscopy (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 2005-2015 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Acrylonitrile/hexyl methacrylate copolymers of different monomer composition were prepared by photopolymerization using uranyl ions as photosensitizer. The copolymer composition data were used to calculate the comonomer reactivity ratios according to the Kelen Tüdős (KT) and the error-in-variables model (EVM) method. The reactivity ratios obtained from the EVM method are rA = 0.14 ± 0.03 and rH = 1.32 ± 0.17. The microstructure was obtained in terms of distribution of A and H centred triad sequences from 13C{1H} NMR spectra of the copolymers. The copolymerization mechanism was determined by using Cheng's methodology. It was found that the Markov second order model gave a good fit to the experimental data. The complex and overlapping proton and carbon signals of A/H copolymers were assigned to various compositional and configurational sequences with the help of inverse HETCOR experiments.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 78
    Electronic Resource
    Electronic Resource
    The effect of temperature on the polymerization of propene with dimethylsilylbis(1-indenyl)zirconium dichloride/methylaluminoxane and dimethylsilylbis(2-methyl-1-indenyl)zirconium dichloride/methylaluminoxane. Modeling of kinetics (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 1989-2004 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Propene polymerizations were performed using the two ansa-zirconocene catalyst systems dimethylsilylbis(1-indenyl)zirconium dichloride/methylaluminoxane and dimethylsilylbis(2-methyl-1-indenyl)zirconium dichloride/methylaluminoxane. The polymerization rate was observed by continuously monitoring the monomer consumption. Reaction rate profiles were obtained in the temperature range from 40°C to 130°C at pressures between 1 and 2.5 bar and catalyst concentrations from 4.6 · 10-6 M to 4.2 · 10-5 M. Isotacticity, as measured by NMR, melting point and molecular weight decreases markedly at higher temperatures. Small amounts of 1,3-inserted monomer (〈1 mol-%) was observed at polymerization temperatures above 80°C. No 2,1-inserted monomer was detected. A kinetic model was developed that describes the polymerization rate for Me2Si(Ind)2ZrCl2 as the catalyst over the entire observed temperature range, and the polymerization rate for Me2Si(2-Me-Ind)2ZrCl2 in a limited temperature range. The model includes an activation reaction, latent sites that may revert to active sites and a permanent deactivation that is second order with respect to the active sites. The activation energy for the propagation reaction was found to be 37 kJ/mol for Me2Si(Ind)2ZrCl2 and 32 kJ/mol for Me2Si(2-Me-Ind)2ZrCl2/MAO. Several kinetic models are compared and discussed.
    Additional Material: 18 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 79
    Electronic Resource
    Electronic Resource
    Preparation of poly(lactic acid)-grafted amylose through the trimethylsilyl protection method and its biodegradation (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 2017-2022 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Biodegradable poly(lactic acid)-grafted amylose was synthesized using a trimethylsilyl (TMS) protection method. Tetrahydrofuran soluble, mostly trimethylsilyl protected amylose was prepared and reacted with potassium tert-butoxide to give the corresponding alkoxide. Poly(lactic acid)-grafted amyloses were obtained by ring-opening anionic polymerization of lactide using the polymeric alkoxides as initiators and subsequent removal of the TMS groups. The obtained graft copolymers show biodegradability and a microphase-separated morphology.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 80
    Electronic Resource
    Electronic Resource
    On the multiple melting behavior of polymorphic syndiotactic polystyrene and its behavior in a miscible state (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 2041-2049 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Differential scanning calorimetry (DSC) and X-ray diffraction analysis were performed to study the multiple melting behavior and crystal forms of neat syndiotactic polystyrene (s-PS) in comparison with its miscible blends with amorphous atactic polystyrene (a-PS) or poly(2,6-dimethyl-p-phenylene oxide) (PPO). For neat s-PS annealed at 242 to 250°C, three melting peaks of changing intensity were observed (labeled I, II, and III from low to high temperature), while if annealed at high temperatures (254°C or higher) only two melting peaks were left. The missing peak was determined to be Peak-III for s-PS annealed at high temperatures. For the s-PS/a-PS or s-PS/PPO blends, two melting peaks were observed, and the missing peak is Peak-II. The missing Peak-II in the blend systems is attributed to the β-modification. Apparently, the condition of s-PS being compatible with a-PS or PPO is unfavorable for generating the β-modification upon melt crystallization. This study also showed that Peak-I is associated with the β-modification. Peak-III may be associated with the less stable β′ form, which can be transformed to the β form upon annealing at high temperatures. For the s-PS/a-PS or s-PS/PPO blends upon annealing at higher temperatures, Peak-III quickly decreases, leaving only a single melting peak (Peak-I) for the blends. The phenomenon of the decrease of Peak-III crystals in the blend is similar to that for neat s-PS annealed at high temperatures.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 81
    Electronic Resource
    Electronic Resource
    Rheological behavior of cured acrylate-terminated unsaturated copolyesters (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 2029-2039 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The viscoelastic properties of cured acrylate-terminated copolyesters were studied by means of dynamic mechanical analysis. The influence of terminal double bonds, as well as of the cis-trans configuration and distribution along the main chain, on the transition temperatures and rheological properties of the cured polyesters are presented. The presence of double bonds at both chain ends allows the formation of a regular network by crosslinking copolymerization with styrene. The present investigation was carried out on three series of acrylate-terminated copolyesters: poly[(tetramethylene maleate)-co-(tetramethylene phthalate)] (BMPA), poly[(tetramethylene fumarate)-co-(tetramethylene phthalate)] (BFPA) and poly[(tetramethylene phthalate)-co-(tetramethylene succinate)] (BPSA). The results of the mechanical spectrometric analysis are presented as master curves by applying the time-temperature superposition principle. The WLF parameters of the cured unsaturated polyesters were determined above the glass transition temperatures. The glass transition temperatures shift to higher temperatures with increasing degree of crosslinking. The equilibrium shear storage modulus plateau changes as a consequence of the different configuration of the double bonds and the degree of crosslinking. The degree of crosslinking, nc, determined from the equilibrium shear modulus G′e, was higher than those determined from equilibrium swelling measurements, which is apparently connected with the contribution of physical entanglements.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 82
    Electronic Resource
    Electronic Resource
    Preparation of poly(methyl methacrylate) microspheres modified with amino acid moieties (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 2023-2028 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Poly(methyl methacrylate) microspheres [poly(SerMA-co-MMA), poly(AlaMAm-co-MMA), poly(AlaEMA-co-MMA), and poly(AlaMAm/AlaEMA-co-MMA)] modified with O-methacryloyl-L-serine (SerMA), N-methacryloyl-L-alanine (AlaMAm) and L-alanine 2-methacryloyloxyethyl ester (AlaEMA) were prepared by the emulsifier-free emulsion copolymerization of methyl methacrylate (MMA) with SerMA, AlaMAm and AlaEMA, respectively, initiated with 2,2′-azobis[2-(2-imidazolin-2-yl)propane] dihydrochloride (ABIP). The series of polymer microspheres showed unimodal distribution of the particle size (290-800 nm) in water. From X-ray photoelectron spectroscopy it was concluded that the amino acid moieties are located on the surface of the particles in all cases. Poly(SerMA-co-MMA) showed the most effective suppression of adsorption of proteins such as albumin (Alb), γ-globulin (Glo) and fibrinogen (Fib) among the examined poly(methylmethacrylate) microspheres.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 83
    Electronic Resource
    Electronic Resource
    Thermotropic liquid crystalline poly(vinyl ether)s with pendant cellobiose residues: Synthesis and mesophase structure (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 2071-2077 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: This study concerns the synthesis of poly(vinyl ether)s (VEs) carrying pendant cellobiose heptadecanoate (CHD) residues and their mesomorphic properties examined by DSC, polarization microscopy and X-ray diffraction. The poly(VE)s were synthesized through cationic polymerization of a CHD-substituted VE, i.e., 10-(vinyloxy)decyl-2,2′,3,3′,4′,6,6′-hepta-O-decanoyl-β-D-cellobioside. From X-ray diffraction analyses, the mesophase of the poly(VE) proved to be closely similar to that of the star-shaped triplet derivative. The mesophase is characterized by the following features; (i) it consists of discotic columns built up by a regular stacking of the pendant CHD residues, (ii) each polymer main chain is presumed to have an extended conformation due to the periodic stacking of the pendant CHD moieties into a columnar structure, and (iii) each polymer molecule independently forms three discotic columns, which surround the main chain, without any intercalation of the CHD pendants originating from different polymer molecules.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 84
    Electronic Resource
    Electronic Resource
    Effects of mixed surfactants on the styrene miniemulsion polymerization in the presence of an alkyl methacrylate (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 2051-2061 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The influence of the mixed surfactants sodium dodecyl sulfate (SDS) and nonylphenol polyethoxylate with an average of 40 ethylene oxide units per molecule (NP-40) on the styrene (ST) miniemulsion polymerization in the presence of dodecyl methacrylate (DMA) and stearyl methacrylate (SMA) was investigated. Both Ostwald ripening and creaming could not be neglected for the miniemulsions stabilized by SDS/NP-40 in combination with DMA upon aging at 35°C, whereas no appreciable Ostwald ripening and creaming were detected for the SMA containing miniemulsions. For both the DMA and SMA containing polymerizations at 80°C, the rate of polymerization (Rp) decreases with increasing NP-40 concentration ([NP-40]). Incorporation of a small quantity of the extremely water-insoluble blue dye into the reaction system was applied to probe the particle nucleation loci. For the DMA containing polymerizations with [NP-40] = 0, 1.25, and 2.50 mM and the SMA polymerization with [NP-40] = 0 mM, homogeneous or micellar nucleation can not be ignored. On the other hand, the more hydrophobic SMA in combination with SDS/NP-40 effectively retards the particle nucleation occurring in the aqueous or micellar phase.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 85
    Electronic Resource
    Electronic Resource
    Crystallization kinetics and melting behavior of poly(butylene adipate), poly(butylene isophthalate) and their copolymers (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 2063-2070 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The melting behavior and the isothermal crystallization kinetics of poly(butylene adipate), poly(butylene isophthalate) and their random copolymers were investigated by means of differential scanning calorimetry. Multiple endotherms, commonly observed on the melting polyesters, were found to be influenced by crystallization temperature and composition. By applying the Hoffman-Weeks method to the isothermally crystallized samples, the equilibrium melting temperatures of the homopolymers were obtained. From calorimetric results on samples with different degree of crystallinity, the equilibrium melting enthalpy of poly(butylene isophthalate) was calculated and the presence of a crystal-amorphous interphase in copolymers was evidenced. Isothermal melt crystallization kinetics was analyzed according to the Avrami equation. As expected, the introduction of a comonomer was found to decrease the overall crystallization rate of the polymers. Values of Avrami exponent close to three were obtained for all the samples, independently of composition and crystallization temperature, in agreement with a crystallization process originating from predetermined nuclei and characterized by three-dimensional spherulitic growth. In the case of poly(butylene isophthalate), the dependence of the rate of crystallization on Tc shows a maximum at an undercooling of approximately 60°C.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 86
    Electronic Resource
    Electronic Resource
    Preparation, properties and biodegradation of stereoregular copolymers of (R,S)-3-butyrolactone and 4-butyrolactone (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 2079-2085 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Copolymers obtained from the copolymerization of (R,S)-3-butyrolactone ((R,S)-3-BL) and 4-butyrolactone (4-BL) catalyzed by isobutylaluminoxane were compared in structure and properties to copolymers having the same types of repeating units produced by Alcaligenes eutrophus when grown with an appropriate substrate or substrate or substrate mixtures. Copolymers with 4-BL contents up to 33 mol-% were prepared and characterized by 1H NMR, 13C NMR, gel permeation chromatography (GPC) and differential scanning calorimetry (DSC). The copolymers had a sequence distribution of 3-hydroxybutyrate (3-HB) and 4-hydroxybutyrate (4-HB) units which were non-random in that very few, if any, sequences of more than two successive 4-HB units were present. The 3-HB units are believed to be separated into isotactic (R) and (S) blocks, but thermal analysis by DSC showed that both the glass transition temperatures and melting temperatures decreased in a regular manner with increasing contents of 4-HB units. Number average molecular weights of the copolymers (Mn) ranged from 7000 to 15000. Biodegradation tests with a bacterial hydrolase showed that the biodegradation rates increased with increasing contents of 4-HB units, as is the case for the equivalent bacterial copolymers.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 87
    Electronic Resource
    Electronic Resource
    Preparation of side-chain liquid-crystalline polymers via pyridylphenol hydrogen bonding (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 2101-2105 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: A series of side-chain liquid-crystalline polymers via pyridyl-phenol hydrogen bonding complexation was prepared by using non-liquid-crystalline precursors, such as poly[(4-vinylpyridine)-co-(butyl acrylate)] and 4-(4′-nitrophenylazo)phenol, 4-(4′-methoxyphenylazo)phenol or 4-(phenylazo)phenol. The association by hydrogen bonding was confirmed by means of FTIR. While the hydrogen bonds are weakened, and some dissociation occurs at the isotropization temperature, complete dissociation needs much higher temperature. The hydrogen bonds re-form as the complex is cooled to room temperature. The nematic liquid crystallinity of the polymer complexes was shown by means of wide-angle X-ray diffraction (WXRD) and polarized optical microscopy (POM). The different substitution groups of azophenol give isotropization temperatures of the polymer complexes in the following sequence: —NO2 〉 —H 〉 —OCH3.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 88
    Electronic Resource
    Electronic Resource
    Tailored rigid-flexible block copolymers, 4Part 3: cf. ref.3. Synthesis and properties of diblocks of poly(p-benzamide) and poly(m-benzamide) (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 2087-2094 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Copolymers were prepared by the condensation of rigid benzoyl-terminated poly(p-benzamide) and flexible anilino-terminated poly(m-benzamide) prepolymers. The use of two monomers of the AB type and of end-capped prepolymers resulted in the formation of diblock molecules uncontaminated by triblock or multiblock sequences. Moreover, selective extraction techniques in N,N-dimethylacetamide (DMAc) with varying amounts of LiCl resulted in the complete elimination of unreacted prepolymers, as evidenced from material balance and 1H NMR data. The above extraction technique also allowed a fractionation of the copolymers in terms of their rigid/flexible compositional distribution ratio. The molecular weight-intrinsic viscosity dependence of poly(m-benzamide) determined in a nonaggregating solvent using light scattering yielded a persistence length of 8 Å, suggesting a relatively large chain flexibility. A tailored copolymer with a fraction β of flexible residues = 0.70 was fractionated, determining the solubility, the viscosity, and the critical composition for mesophase formation in DMAc/LiCl and in 96% H2SO4 solutions. The results, in line with those previously reported for a related system, reveal that the addition of the flexible segment has a little effect on the critical concentration of poly(p-benzamide), whereas the biphasic gap is strongly reduced. Moreover, the solubility of the copolymer is substantially increased over that of the rigid homopolymer. The net result is an unexpected widening of the range of stability of the pure mesophase, with significant implications from both a fundamental and an applied standpoint.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 89
    Electronic Resource
    Electronic Resource
    Synthesis and characterization of a new polymer containing an electron accepting perfluoro group (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 2107-2112 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Poly{oxy-4,4′-octafluorobiphenylyleneoxy-alt-[1,4-phenylenevinylene(3-trimethylsilyl-1,4-phenylene)vinylene-1,4-phenylene]} (PFSi) was synthesized and characterized to investigate its thermal, optical, electrical and xerographic properties. An LED (light emitting device) using PFSi as the light emitting layer exhibits maximum emission for blue light, but a high turn-on voltage. The origin of the low device performance was examined by investigating the photoconducting behavior. PFSi shows a high photoconductivity in the presence of electron acceptors such as 5-nitroanthranilonitrile (5NAN), and the photoconductivity of PFSi is improved by introducing charge transport materials such as triphenylamine (TPA).
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 90
    Electronic Resource
    Electronic Resource
    Synthesis and phase behavior of side-chain liquid crystalline polymers with pendant quinoline rings bearing either a polar or a non-polar end group (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 2095-2099 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Four methacrylate monomers, 2a-2d, containing a quinoline ring with a NO2 or a OCH3 group at the end of the mesogen were synthesized and polymerized. The copolymers with six methylene units as spacer, 3b-3d, showed a smectic phase induced by electron donor-acceptor interactions of the side groups. The homopolymer with eleven methylene units as spacer and methoxy end group, 3f, showed a smectic phase induced by the large length of the spacer. The copolymers with eleven methylene units, 3g-3i, showed a smectic phase induced by both the electron donor-acceptor interactions of the side groups and the large length of the spacer.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 91
    Electronic Resource
    Electronic Resource
    Molecular character of sharkskin phenomenon in metallocene linear low density polyethylenes (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 2113-2118 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The effect of molecular weight on sharkskin dynamics is systematically studied using three metallocene-catalyzed linear low density polyethylenes (mLLDPE) of different molecular weights. A new experimental method is developed to enable in-situ characterization of the time scale τ on which sharkskin forms on the extrudate. This laser scattering technique directly measures the periodic variation of the refracted light of the rough sharkskin-like extrudate surface. It is found that τ increases with molecular weight as strongly as the overall molecular chain relaxation time, τ*, determined from oscillatory shear measurements. The observed molecular weight dependence provides additional support for the recently proposed interfacial stress growth/relaxation mechanism for sharkskin formation.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 92
    Electronic Resource
    Electronic Resource
    Synthesis and properties of poly(dimethyldiphenylsilylenemethylene) (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 2119-2127 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The novel polycarbosilane poly(dimethyldiphenylsilylenemethylene) (PDMDPSM) (2) was prepared by H2PtCl6-catalyzed ring-opening polymerization (ROP) of 1,1-dimethyl-3,3-diphenyl-1,3-disilacyclobutane (1). Polymerization in bulk at elevated temperature afforded high molecular weight PDMDPSM (Mw = 577000) with monomodal molecular weight distribution and regularly alternating SiR2/CH2 backbone structure. NMR spectroscopy revealed that a minor fraction of the monomer units is incorporated irregularly during polymerization in bulk, leading to structural units of the type —SiPh2—CH2—SiPh2— and —SiMe2—CH2—SiMe2—. The amount of regularly alternating dimethyl- and diphenylsilylenemethylene units increases when the polymerization is performed in solution at lower temperatures. PDMDPSM shows a glass transition temperature (Tg) at 50°C, which lies between the TgS of poly(methylphenylsilylenemethylene) (PMPSM) and poly(diphenylsilylenemethylene) (PDPSM), demonstrating the stiffening effect of the SiPh2 groups. Thermogravimetric analysis (TGA) evidenced nearly identical thermal stability of PDMDPSM and PMPSM.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 93
    Electronic Resource
    Electronic Resource
    Supramolecular structures of poly(p-phenylenes) with oxyethylene side chains and their mixtures with lithium salts (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 2129-2140 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: A series of poly(p-phenylenes) with linear and branched oxyethylene side chains was synthesized. Microphase separation in the solid state causes polymers with linear side chains to form supramolecular structures, which consist of main chain layers separated by an amorphous side chain matrix. If mixed with lithium salts such as lithium triflate (LiOTf) or lithium bis(trifluoromethanesulfone)imide (LiNTf), the polymers form solid solutions. The experimental data suggest that the layered structures undergo a one-dimensional swelling in the direction perpendicular to the main chain layers when blended with LiOTf and that this salt is only incorporated into the side chain matrix. The observed melting point depression in polymer-LiNTf mixtures is explained by the assumption that the salt species are incorporated both into the side chain and the main chain microphase.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 94
    Electronic Resource
    Electronic Resource
    Dielectric relaxation and relationships of local molecular mobility in linear and comb-like thermotropic polymers (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 2147-2152 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The dielectric behavior of several thermotropic linear and comb-like polymers with flexible spacers and mesogenic fragments with different structure has been studied in a frequency range from 60 Hz to 1 MHz in the bulk state (below the glass transition temperature). Two regions of dipole relaxation caused by local mobility were detected. It was shown that the relaxation parameters of the first process virtually do not change with increasing spacer length and have similar values in polymers with different structure. In the case of the second process, in increase in spacer length considerably increases the mobility of kinetic elements.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 95
    Electronic Resource
    Electronic Resource
    Sequential reordering in condensation polymers, 5Parts 1-4: refs.4-7. Preparation and characterization of copolymers via transesterification of a polycaprolactonepoly(2,2-dimethyltrimethylene carbonate) blend (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 2153-2164 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: A blend of polycaprolactone (PCL) and poly(2,2-dimethyltrimethylene carbonate) (PDTC) containing catalytic amounts of dibutyltin dimethoxide was prepared from solution. The blend was then subjected to melt-mixing at 200°C and samples were taken after different times. According to thermal analysis data, with the increase of reaction time a gradual loss of the crystallizability of the blend components is observed, and after 70 min at 200°C the system becomes completely amorphous. 13C NMR data suggest that the loss of crystallizability of the blend is accompanied by an abrupt decrease in PCL and PDTC sequence lengths reaching after 70 min at 200°C an average length of about two repeating units each. These effects are explained by transesterification reactions between the lactone and carbonate units.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 96
    Electronic Resource
    Electronic Resource
    Crystallization kinetics and morphology of poly(ferrocenyldimethylsilane) (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 2141-2145 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: A series of poly(ferrocenyldimethylsilanes) were prepared via anionic ring-opening polymerization. The isothermal crystallization kinetics were investigated by means of differential scanning calorimetry and analyzed in terms of the Avrami equation. The value of the Avrami exponent is approximately 3 for the majority of samples and crystallization temperatures. This suggests a three-dimensional spherulitic growth and an instantaneous nucleation mechanism. The morphology of melt-crystallized samples was studied by atomic force microscopy. Hedrites (immature spherulites) were formed at low undercoolings whereas at high levels of undercooling mature, well developed spherulites were observed with small hedritic features in their center. The melting enthalpy for a 100% crystalline polymer was estimated to be 36 J/g from differential scanning calorimetry and X-ray diffraction data obtained by using specimens with different degrees of crystallinity.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 97
    Electronic Resource
    Electronic Resource
    Reactive polymers incorporating silyl enol ether groups, 3Part 2: cf. ref.1. Incorporation of α,β-bis(siloxy)vinylene units into the backbone of vinyl polymers by free-radical (co)polymerization of 2,3-bis(trialkylsiloxy)butadienes (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 2173-2178 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: 2,3-Bis(trimethylsiloxy)butadiene (1) and 2,3-bis(tert-butyldimethylsiloxy)butadiene (2) have been homopolymerized and copolymerized with styrene (St) and methyl methacrylate (MMA) under freeradical conditions. Comparison of initial rates and molecular weights with polymerizations conducted under identical experimental conditions on monosubstituted analogs, 2-trimethysiloxybutadiene (3) and 2-(tert-butyldimethylsiloxy)butadiene (4), demonstrated that the second substituent does not decrease the polymerizability significantly despite the additional steric hindrance introduced in the monomer. Extensive 1H and 13C NMR characterization of the polymers demonstrated that the main incorporation mode is of the 1,4-type, allowing more than 95% of the butadienyl subunit to be incorporated in the main chain as an α,β-bis(trialkylsiloxy)vinylene functional group. Monomer reactivity ratios r1 and r2 at 60°C were determined from copolymer composition curves obtained at low conversions and are compared with values obtained for other 1,2-butadienyl systems.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 98
    Electronic Resource
    Electronic Resource
    Radical polyaddition-isomerization of bifunctional vinylcyclopropanes with dithiols (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 2165-2172 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Synthesis and radical polyaddition-isomerization of novel bifunctional vinylcyclopropane derivatives, 1,4-xylylene bis(2-isopropenyl-2-methylcyclopropanecarboxylate) (1a), ethylene bis(2-isopropenyl-2-methylcyclopropanecarboxylamide) (1b), and bis(2-isopropenyl-2-methylcyclopropanemethyl) terephthalate (1c) with dithiols were carried out. Polymers with molecular weights and polydispersities of 1100-11000 and 1.18-7.35, respectively, were obtained. The radical polyadditions of 1a with dithiols afford polymers containing a homopolymer of 1a, while those of 1b and 1c with dithiols afford polymers with a content of dithiol units of exactly 50 mol-%.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 99
    Electronic Resource
    Electronic Resource
    Ge- and sn-containing poly(p-xylylene): synthesis, structure and thermal behavior (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 2179-2184 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Block copolymers of unsubstituted poly(p-xylylene)(PPX) and Ge- or Sn-organic bridged PPX (GePPX and SnPPX) were prepared by pyrolysis of specially synthesized organometallic p-cyclophane precursors followed by deposition and polymerization of the thus produced p-xylylene monomers. The copolymer structure and thermal behavior were investigated depending on deposition temperature (10 and -196°C). The copolymer PPX-GePPX obtained from solid monomers deposited at -196°C (2a) consists of long quasi-independent PPX and GePPX blocks and has paracrystalline structure. Thermal treatment of 2a near 160°C yields crystalline regions of PPX along with paracrystalline aggregates of GePPX. Pyrolysis of this system near 300°C in an inert atmosphere results in the formation of Ge crystals in PPX matrix. In contrast, the copolymer PPX-GePPX produced by simultaneous deposition and polymerization at 10°C (2a′) contains shorter blocks of PPX and GePPX than the copolymer deposited at -196°C. Copolymer 2a′ turns to the amorphous state during thermal treatment, and its pyrolysis does not lead to Ge-crystal formation; hence the supramolecular structure of the polymer plays an important role in inorganic phase formation. The copolymer PPX-SnPPX (2b) is formed only at a deposition temperature of -196°C; deposition at 10°C yields oligomeric resins. The structure of 2b is nearly the same as that of 2a; pyrolysis of 2b in air results in SnO2-crystal formation in a PPX matrix.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 100
    Electronic Resource
    Electronic Resource
    PVC modification with pyridine groups. Synthesis, characterization and transformation to ionomers (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 2199-2204 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The modification of PVC with 4-mercaptopyridine is described. The content of pyridine groups in the products is measured by NMR and IR spectroscopy. The degree of modification depends on the reaction conditions, and values of up to 70% are achieved without degradation or other appreciable side reactions. The tertiary amino groups in the polymer can be alkylated with iodides of varying chain length to form quantitatively quaternary pyridinium salt groups, leading to PVC ionomers and polyelectrolytes.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...