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  • Animals  (521)
  • ENERGY PRODUCTION AND CONVERSION
  • 1995-1999  (580)
  • 1990-1994
  • 1980-1984
  • 1995  (580)
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Keywords
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  • 1995-1999  (580)
  • 1990-1994
  • 1980-1984
Year
  • 1
    Electronic Resource
    Electronic Resource
    Phylogenetic position of Dictyostelium inferred from multiple protein data sets (1995)
    Springer
    Journal of molecular evolution 41 (1995), S. 238-246 
    Details
    ISSN: 1432-1432
    Keywords: Cellular slime molds ; Animals ; Fungi ; Plantae ; Maximum-likelihood method ; Evolution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The phylogenetic position of Dictyostelium inferred from 18S rRNA data contradicts that from protein data. Protein trees always show the close affinity of Dictyostelium with animals, fungi, and plants, whereas in 18S rRNA trees the branching of Dictyostelium is placed at a position before the massive radiation of protist groups including the divergence of the three kingdoms. To settle this controversial issue and to determine the correct position of Dictyostelium, we inferred the phylogenetic relationship among Dictyostelium and the three kingdoms Animalia, Fungi, and Plantae by a maximum-likelihood method using 19 different protein data sets. It was shown at the significance level of 1 SE that the branching of Dictyostelium antedates the divergence of Animalia and Fungi, and Plantae is an outgroup of the Animalia-Fungi-Dictyostelium clade.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00170678
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Segmentation and tracking of piglets in images (1995)
    Springer
    Machine vision and applications 8 (1995), S. 187-193 
    Details
    ISSN: 1432-1769
    Keywords: Tracking ; Segmentation ; Pigs ; Animals ; Computer vision
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract An algorithm was developed for the segmentation and tracking of piglets and tested on a 200-image sequence of 10 piglets moving on a straw background. The image-capture rate was 1 image/140 ms. The segmentation method was a combination of image differencing with respect to a median background and a Laplacian operator. The features tracked were blob edges in the segmented image. During tracking, the piglets were modelled as ellipses initialised on the blobs. Each piglet was tracked by searching for blob edges in an elliptical window about the piglet's position, which was predicted from its previous two positions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01215814
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  • 3
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    Inhibition of ocular dominance column formation by infusion of NT-4/5 or BDNF (1995)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1995-03-17
    Description: During the development of the visual system of higher mammals, axons from the lateral geniculate nucleus (LGN) become segregated into eye-specific patches (the ocular dominance columns) within their target, layer 4 of the primary visual cortex. This occurs as a consequence of activity-dependent synaptic competition between axons representing the two eyes. The possibility that this competition could be mediated through neurotrophin-receptor interactions was tested. Infusion of neurotrophin-4/5 (NT-4/5) or brain-derived neurotrophic factor (BDNF) into cat primary visual cortex inhibited column formation within the immediate vicinity of the infusion site but not elsewhere in the visual cortex. Infusion of nerve growth factor, neurotrophin 3 (NT-3), or vehicle solution did not affect column formation. These observations implicate TrkB, the common receptor for BDNF and NT-4/5, in the segregation of LGN axons into ocular dominance columns in layer 4. Moreover, they suggest that in addition to their better known roles in the prevention of cell death, neurotrophins may also mediate the activity-dependent control of axonal branching during development of the central nervous system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cabelli, R J -- Hohn, A -- Shatz, C J -- EY02858/EY/NEI NIH HHS/ -- EY06327/EY/NEI NIH HHS/ -- MH 48108/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1995 Mar 17;267(5204):1662-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, University of California, Berkeley 94720.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7886458" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Autoradiography ; Axons/drug effects/*physiology ; Brain-Derived Neurotrophic Factor ; Cats ; Dominance, Cerebral/*drug effects ; Geniculate Bodies/drug effects/*ultrastructure ; Nerve Growth Factors/*pharmacology ; Nerve Tissue Proteins/*pharmacology ; Neurotrophin 3 ; Receptor, Ciliary Neurotrophic Factor ; Receptors, Nerve Growth Factor/physiology ; Visual Cortex/*drug effects/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)
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  • 4
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    Crystal structure of DCoH, a bifunctional, protein-binding transcriptional coactivator (1995)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1995-04-28
    Description: DCoH, the dimerization cofactor of hepatocyte nuclear factor-1, stimulates gene expression by associating with specific DNA binding proteins and also catalyzes the dehydration of the biopterin cofactor of phenylalanine hydroxylase. The x-ray crystal structure determined at 3 angstrom resolution reveals that DCoH forms a tetramer containing two saddle-shaped grooves that comprise likely macromolecule binding sites. Two equivalent enzyme active sites flank each saddle, suggesting that there is a spatial connection between the catalytic and binding activities. Structural similarities between the DCoH fold and nucleic acid-binding proteins argue that the saddle motif has evolved to bind diverse ligands or that DCoH unexpectedly may bind nucleic acids.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Endrizzi, J A -- Cronk, J D -- Wang, W -- Crabtree, G R -- Alber, T -- New York, N.Y. -- Science. 1995 Apr 28;268(5210):556-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Cell Biology, University of California, Berkeley 94720-3206, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7725101" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Binding Sites ; Computer Graphics ; Crystallography, X-Ray ; Gene Expression Regulation ; Hydro-Lyases/*chemistry/metabolism ; Models, Molecular ; Molecular Sequence Data ; Protein Conformation ; Protein Folding ; Protein Structure, Secondary ; Rats ; Recombinant Fusion Proteins/chemistry/metabolism ; Transcription Factors/*chemistry/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)
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  • 5
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    Opposing effects of ERK and JNK-p38 MAP kinases on apoptosis (1995)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1995-11-24
    Description: Apoptosis plays an important role during neuronal development, and defects in apoptosis may underlie various neurodegenerative disorders. To characterize molecular mechanisms that regulate neuronal apoptosis, the contributions to cell death of mitogen-activated protein (MAP) kinase family members, including ERK (extracellular signal-regulated kinase), JNK (c-JUN NH2-terminal protein kinase), and p38, were examined after withdrawal of nerve growth factor (NGF) from rat PC-12 pheochromocytoma cells. NGF withdrawal led to sustained activation of the JNK and p38 enzymes and inhibition of ERKs. The effects of dominant-interfering or constitutively activated forms of various components of the JNK-p38 and ERK signaling pathways demonstrated that activation of JNK and p38 and concurrent inhibition of ERK are critical for induction of apoptosis in these cells. Therefore, the dynamic balance between growth factor-activated ERK and stress-activated JNK-p38 pathways may be important in determining whether a cell survives or undergoes apoptosis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Xia, Z -- Dickens, M -- Raingeaud, J -- Davis, R J -- Greenberg, M E -- CA43855/CA/NCI NIH HHS/ -- CA65861/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1995 Nov 24;270(5240):1326-31.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurology, Children's Hospital, Harvard Medical School, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7481820" target="_blank"〉PubMed〈/a〉
    Keywords: Alkaloids/pharmacology ; Animals ; *Apoptosis ; Calcium-Calmodulin-Dependent Protein Kinases/*antagonists & ; inhibitors/genetics/*metabolism ; Cell Differentiation ; Enzyme Activation ; Genes, jun ; *JNK Mitogen-Activated Protein Kinases ; MAP Kinase Kinase 1 ; MAP Kinase Kinase 3 ; MAP Kinase Kinase 4 ; MAP Kinase Kinase Kinases ; Mitogen-Activated Protein Kinase 1 ; Mitogen-Activated Protein Kinase 3 ; *Mitogen-Activated Protein Kinase Kinases ; *Mitogen-Activated Protein Kinases ; Nerve Growth Factors/pharmacology ; Neurons/*cytology/enzymology ; PC12 Cells ; Protein Kinases/*metabolism ; Protein-Serine-Threonine Kinases/genetics/metabolism ; Protein-Tyrosine Kinases/*antagonists & inhibitors/genetics/metabolism ; Rats ; *Signal Transduction ; Staurosporine ; Sympathetic Nervous System/cytology ; 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
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  • 6
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    FFA-1, a protein that promotes the formation of replication centers within nuclei (1995)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1995-09-29
    Description: In the nuclei of eukaryotic cells, initiation of DNA replication occurs at a discrete number of foci. One component of these foci is the DNA replication factor RP-A. Here, the process leading to the association of RP-A with foci was reconstituted with cytosolic fractions derived from Xenopus eggs. With the use of this fractionated system, a 170-kilodalton protein required for the assembly of RP-A into foci was identified and purified. The protein appears to be an integral component of the foci at which replication of DNA is initiated in eukaryotic nuclei.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yan, H -- Newport, J -- GM33523/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1995 Sep 29;269(5232):1883-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉University of California, San Diego, Department of Biology, La Jolla, CA 92093, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7569932" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Nucleus/*metabolism ; Cell-Free System ; Cytosol/chemistry ; *DNA Replication ; DNA, Single-Stranded/metabolism ; DNA-Binding Proteins/*metabolism ; Female ; Male ; Molecular Weight ; Oocytes ; Orientation ; Proteins/chemistry/*metabolism ; Replication Protein A ; Xenopus
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 7
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    Animal research bills threaten Polish science (1995)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1995-07-21
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stone, Richard -- New York, N.Y. -- Science. 1995 Jul 21;269(5222):291.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11644752" target="_blank"〉PubMed〈/a〉
    Keywords: *Animal Experimentation ; *Animal Welfare ; Animals ; Databases, Factual ; *Government Regulation ; Legislation as Topic ; Poland ; *Social Control, Formal
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 8
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    Orphanin FQ: a neuropeptide that activates an opioidlike G protein-coupled receptor (1995)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1995-11-03
    Description: A heptadecapeptide was identified and purified from porcine brain tissue as a ligand for an orphan heterotrimeric GTP-binding protein (G protein)-coupled receptor (LC132) that is similar in sequence to opioid receptors. This peptide, orphanin FQ, has a primary structure reminiscent of that of opioid peptides. Nanomolar concentrations of orphanin FQ inhibited forskolin-stimulated adenylyl cyclase activity in cells transfected with LC132. This inhibitory activity was not affected by the addition of opioid ligands, nor did the peptide activate opioid receptors. Orphanin FQ bound to its receptor in a saturable manner and with high affinity. When injected intracerebroventricularly into mice, orphanin FQ caused a decrease in locomotor activity but did not induce analgesia in the hot-plate test. However, the peptide produced hyperalgesia in the tail-flick assay. Thus, orphanin FQ may act as a transmitter in the brain by modulating nociceptive and locomotor behavior.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Reinscheid, R K -- Nothacker, H P -- Bourson, A -- Ardati, A -- Henningsen, R A -- Bunzow, J R -- Grandy, D K -- Langen, H -- Monsma, F J Jr -- Civelli, O -- DA 08562/DA/NIDA NIH HHS/ -- DA 09620/DA/NIDA NIH HHS/ -- New York, N.Y. -- Science. 1995 Nov 3;270(5237):792-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Pharma Division, Hoffmann-La Roche AG, Basel, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7481766" target="_blank"〉PubMed〈/a〉
    Keywords: Adenylyl Cyclase Inhibitors ; Amino Acid Sequence ; Analgesics/pharmacology ; Animals ; CHO Cells ; Colforsin/pharmacology ; Cricetinae ; GTP-Binding Proteins/*metabolism ; Hypothalamus/chemistry ; Injections, Intraventricular ; Injections, Spinal ; Ligands ; Mice ; Molecular Sequence Data ; Motor Activity/drug effects ; Opioid Peptides/chemistry/*isolation & purification/*metabolism/pharmacology ; Pain Measurement ; Receptors, Neuropeptide/*metabolism ; Receptors, Opioid/*metabolism ; Swine ; Transfection
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 9
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    The control of calcium release in heart muscle (1995)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1995-05-19
    Description: The control of calcium release from intracellular stores (the sarcoplasmic reticulum) in cardiac muscle was examined with the use of a confocal microscope and voltage clamp techniques. Depolarization evoked graded calcium release by altering the extent of spatial and temporal summation of elementary calcium release events called "calcium sparks." These evoked sparks were triggered by local L-type calcium channel currents in a stochastic manner, were similar at different potentials, and resembled spontaneous calcium sparks. Once triggered, the calcium release from the sarcoplasmic reticulum during a calcium spark was independent of the duration of the triggering calcium influx. These results were used to develop a unifying model for cardiac excitation-contraction coupling that explains the large (but paradoxically stable) amplification of the trigger calcium influx by a combination of digital and analog behavior.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cannell, M B -- Cheng, H -- Lederer, W J -- HL25675/HL/NHLBI NIH HHS/ -- HL36974/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1995 May 19;268(5213):1045-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmacology and Clinical Pharmacology, St. George's Hospital Medical School, London, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7754384" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Calcium/*metabolism ; Calcium Channels/*physiology ; In Vitro Techniques ; Ion Channel Gating/physiology ; Membrane Potentials/physiology ; Microscopy, Confocal ; Muscle Proteins/physiology ; Myocardium/*metabolism ; Patch-Clamp Techniques ; Probability ; Rats ; Ryanodine Receptor Calcium Release Channel ; Sarcoplasmic Reticulum/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 10
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    A middle stone age worked bone industry from Katanda, Upper Semliki Valley, Zaire (1995)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1995-04-28
    Description: Three archaeological sites at Katanda on the Upper Semliki River in the Western Rift Valley of Zaire have provided evidence for a well-developed bone industry in a Middle Stone Age context. Artifacts include both barbed and unbarbed points as well as a daggerlike object. Dating by both direct and indirect means indicate an age of approximately 90,000 years or older. Together with abundant fish (primarily catfish) remains, the bone technology indicates that a complex subsistence specialization had developed in Africa by this time. The level of behavioral competence required is consistent with that of upper Paleolithic Homo sapiens sapiens. These data support an African origin of behaviorally as well as biologically modern humans.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yellen, J E -- Brooks, A S -- Cornelissen, E -- Mehlman, M J -- Stewart, K -- New York, N.Y. -- Science. 1995 Apr 28;268(5210):553-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Archaeology Program, National Science Foundation, Arlington, VA 22230, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7725100" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Archaeology ; *Behavior ; Democratic Republic of the Congo ; History, Ancient ; *Hominidae ; Humans
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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