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  • American Association for the Advancement of Science (AAAS)
  • American Meteorological Society
  • 1995-1999  (16,015)
  • 1960-1964  (1,719)
Collection
Keywords
Publisher
Years
Year
  • 1
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    Stochastic Lagrangian Models of Turbulent Diffusion (1996)
    American Meteorological Society
    Details
    Publication Date: 1996-08-01
    Description: No Abstract available.
    Print ISSN: 0065-9401
    Electronic ISSN: 1943-3646
    Topics: Geography , Geosciences , Physics
    Published by American Meteorological Society
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  • 2
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    Meteorology of the Southern Hemisphere (1998)
    American Meteorological Society
    Details
    Publication Date: 1998-12-01
    Description: No Abstract available.
    Print ISSN: 0065-9401
    Electronic ISSN: 1943-3646
    Topics: Geography , Geosciences , Physics
    Published by American Meteorological Society
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  • 3
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    Suppression of volcanism during rapid extension in the basin and range province, united states (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-01-09
    Description: Continental extension and volcanism are generally thought to be complementary. Stratigraphic and structural data from some highly extended parts of the Basin and Range province reveal instead that rapid extension appears to have suppressed volcanism. This relation may reflect enhanced crystallization of midcrustal magmas during extension resulting from exsolution of magmatic volatiles, increased interaction of magmas with meteoric water, and dispersal of magma into smaller bodies. Some rift environments may thus be characterized by voluminous synextensional plutonism with little or no concomitant volcanism.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gans -- Bohrson -- New York, N.Y. -- Science. 1998 Jan 2;279(5347):66-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Geological Sciences and Institute for Crustal Studies, University of California, Santa Barbara, CA 93106, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9417024" target="_blank"〉PubMed〈/a〉
    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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    Bimetallic system for nitrogen fixation: ruthenium-assisted protonation of coordinated N2 on tungsten with H2 (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-01-28
    Description: Treatment of the tungsten dinitrogen complex cis-[W(N2)2(PMe2Ph)4] (Me = methyl, Ph = phenyl) with an equilibrium mixture of [RuCl(dppp)2]X and trans-[RuCl(eta2-H2)(dppp)2]X [X = BF4, PF6, or OSO2CF3; dppp = 1,3-bis(diphenylphosphino)propane] under 1 atmosphere of dihydrogen at 55 degrees Celsius for 24 hours gave NH3 in moderate yield. The same reaction in the presence of acetone produced acetone azine in high yield. None of these reactions proceeded in the absence of dihydrogen.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nishibayashi -- Iwai -- Hidai -- New York, N.Y. -- Science. 1998 Jan 23;279(5350):540-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9438842" target="_blank"〉PubMed〈/a〉
    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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    Driving the growth cone (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-09-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Caroni, P -- New York, N.Y. -- Science. 1998 Sep 4;281(5382):1465-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Friedrich Miescher Institute, Basel, Switzerland. caroni@fmi.ch〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9750116" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylcholine/physiology ; Animals ; Axons/*physiology ; Brain-Derived Neurotrophic Factor/physiology ; Calcium/metabolism ; Cell Movement ; Cyclic AMP/*physiology ; Cyclic GMP/*physiology ; Glycoproteins/physiology ; Nerve Growth Factors/physiology ; Neurons/*physiology ; Neurotrophin 3 ; Semaphorin-3A ; Signal Transduction ; Tumor Suppressor Proteins
    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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  • 6
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    Metastasis in eggs (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-10-17
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sikorski, R -- Peters, R -- New York, N.Y. -- Science. 1998 Sep 18;281(5384):1823.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9776688" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Blood Vessels/physiology ; Chick Embryo ; *Chorion/blood supply ; Humans ; Metalloendopeptidases/metabolism ; *Neoplasm Metastasis ; Neoplasm Seeding ; *Polymerase Chain Reaction ; Receptors, Cell Surface/metabolism ; Receptors, Urokinase Plasminogen Activator ; 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)
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  • 7
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    Activity-dependent cortical target selection by thalamic axons (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-07-24
    Description: Connections in the developing nervous system are thought to be formed initially by an activity-independent process of axon pathfinding and target selection and subsequently refined by neural activity. Blockade of sodium action potentials by intracranial infusion of tetrodotoxin in cats during the early period when axons from the lateral geniculate nucleus (LGN) were in the process of selecting visual cortex as their target altered the pattern and precision of this thalamocortical projection. The majority of LGN neurons, rather than projecting to visual cortex, elaborated a significant projection within the subplate of cortical areas normally bypassed. Those axons that did project to their correct target were topographically disorganized. Thus, neural activity is required for initial targeting decisions made by thalamic axons as they traverse the subplate.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Catalano, S M -- Shatz, C J -- EY02838/EY/NEI NIH HHS/ -- EY06491/EY/NEI NIH HHS/ -- New York, N.Y. -- Science. 1998 Jul 24;281(5376):559-62.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute and Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720-3200, USA. scatalan@cco.caltech.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9677198" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials/drug effects ; Animals ; Auditory Cortex/cytology/embryology ; Axons/*physiology/ultrastructure ; Carbocyanines ; Cats ; Dendrites/ultrastructure ; Geniculate Bodies/cytology/*embryology ; Neural Pathways ; Tetrodotoxin/pharmacology ; Visual Cortex/cytology/*embryology
    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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  • 8
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    Structural basis for a Ca2+-sensing function of the metabotropic glutamate receptors (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-03-28
    Description: The metabotropic glutamate receptors (mGluRs) are widely distributed in the brain and play important roles in synaptic plasticity. Here it is shown that some types of mGluRs are activated not only by glutamate but also by extracellular Ca2+ (Ca2+o). A single amino acid residue was found to determine the sensitivity of mGluRs to Ca2+o. One of the receptors, mGluR1alpha, but not its point mutant with reduced sensitivity to Ca2+o, caused morphological changes when transfected into mammalian cells. Thus, the sensing of Ca2+o by mGluRs may be important in cells under physiological condition.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kubo, Y -- Miyashita, T -- Murata, Y -- New York, N.Y. -- Science. 1998 Mar 13;279(5357):1722-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurophysiology, Tokyo Metropolitan Institute for Neuroscience, Musashidai 2-6, Fuchu, Tokyo 183-8526, Japan. ykubo@tmin.ac.jp〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9497291" target="_blank"〉PubMed〈/a〉
    Keywords: Actins/ultrastructure ; Amino Acid Sequence ; Animals ; Binding Sites ; Brain/metabolism ; CHO Cells ; Calcium/*metabolism/pharmacology ; Cell Size ; Cricetinae ; Cyclic AMP/metabolism ; G Protein-Coupled Inwardly-Rectifying Potassium Channels ; Glutamic Acid/metabolism/pharmacology ; Molecular Sequence Data ; Oocytes ; Point Mutation ; Potassium Channels/metabolism ; *Potassium Channels, Inwardly Rectifying ; Rats ; Receptors, Metabotropic Glutamate/chemistry/genetics/*metabolism ; Recombinant Fusion Proteins/metabolism ; Second Messenger Systems ; Transfection ; Xenopus laevis
    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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    Long-range electrostatic trapping of single-protein molecules at a liquid-solid interface (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-09-11
    Description: The motion of single, dye-labeled protein molecules was monitored at various pH and ionic strengths within the 180-nanometer-thick evanescent-field layer at a fused-silica surface. Below the isoelectric point, molecules partitioning into the excitation region increased in number but maintained a random spatial distribution, implying that surface charge can influence the charged protein at distances beyond that of the electrical double-layer thickness. The residence times of the molecules in the interfacial layer also increased below the isoelectric point. However, immobilization on the solid surface for extended periods was not observed. Histograms of residence times exhibit nearly identical asymmetry as the corresponding elution peaks in capillary electrophoresis. These results are a direct verification of the statistical theory of chromatography at the single-molecule level, with the caveat that long-range trapping rather than adsorption is the dominant mechanism.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Xu, X H -- Yeung, E S -- New York, N.Y. -- Science. 1998 Sep 11;281(5383):1650-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Ames Laboratory-U.S. Department of Energy and Department of Chemistry, Iowa State University, Ames, IA 50011, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9733506" target="_blank"〉PubMed〈/a〉
    Keywords: Chemistry, Physical ; Chromatography ; Concanavalin A/*chemistry ; Diffusion ; Electrophoresis, Capillary ; Fluorescence ; Hydrogen-Ion Concentration ; Isoelectric Point ; Osmolar Concentration ; Physicochemical Phenomena ; Proteins/*chemistry ; Rhodamines ; Static Electricity
    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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  • 10
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    Spatial organization of transcription elongation complex in Escherichia coli (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-07-17
    Description: During RNA synthesis in the ternary elongation complex, RNA polymerase enzyme holds nucleic acids in three contiguous sites: the double-stranded DNA-binding site (DBS) ahead of the transcription bubble, the RNA-DNA heteroduplex-binding site (HBS), and the RNA-binding site (RBS) upstream of HBS. Photochemical cross-linking allowed mapping of the DNA and RNA contacts to specific positions on the amino acid sequence. Unexpectedly, the same protein regions were found to participate in both DBS and RBS. Thus, DNA entry and RNA exit occur close together in the RNA polymerase molecule, suggesting that the three sites constitute a single unit. The results explain how RNA in the integrated unit RBS-HBS-DBS may stabilize the ternary complex, whereas a hairpin in RNA result in its dissociation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nudler, E -- Gusarov, I -- Avetissova, E -- Kozlov, M -- Goldfarb, A -- GM49242/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1998 Jul 17;281(5375):424-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, New York University Medical Center, New York, NY 10016, USA. evgeny.nudler@med.nyu.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9665887" target="_blank"〉PubMed〈/a〉
    Keywords: Binding Sites ; DNA, Bacterial/chemistry/*metabolism ; DNA-Directed RNA Polymerases/chemistry/*metabolism ; Escherichia coli/*genetics/metabolism ; Idoxuridine/metabolism ; Models, Genetic ; Nucleic Acid Conformation ; Nucleic Acid Heteroduplexes/*metabolism ; Protein Binding ; RNA, Bacterial/chemistry/*metabolism ; Templates, Genetic ; *Transcription, Genetic ; Ultraviolet Rays
    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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