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  • Articles  (166)
  • Animals  (166)
  • 2020-2024
  • 1975-1979  (166)
  • 1970-1974
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  • Articles  (166)
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  • 1
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    A direct role of dopamine in the rat subthalamic nucleus and an adjacent intrapeduncular area (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-12-21
    Description: The subthalamic nucleus, a clinically important component of the extrapyramidal motor system, and a lateral area extending into the peduncle contain catecholamine terminals and dopamine receptors coupled to adenylate cyclase. In addition, dopamine agonists administered in vivo enhance glucose utilization in the region. Thus, neuronal function in this region is directly affected by dopamine and dopaminergic drugs.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brown, L L -- Markman, M H -- Wolfson, L I -- Dvorkin, B -- Warner, C -- Katzman, R -- New York, N.Y. -- Science. 1979 Dec 21;206(4425):1416-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/505015" target="_blank"〉PubMed〈/a〉
    Keywords: Adenylyl Cyclases/metabolism ; Animals ; Brain Mapping ; Catecholamines/pharmacology ; Dopamine/pharmacology ; Enzyme Activation/drug effects ; Extrapyramidal Tracts/*metabolism/ultrastructure ; Glucose/metabolism ; Male ; Mesencephalon/*metabolism ; Neurons/metabolism ; Rats ; Receptors, Dopamine/*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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  • 2
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    Increased resistance to Staphylococcus aureus infection and enhancement in serum lysozyme activity by glucan (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-03-24
    Description: Glucan is a potent reticuloendothelial stimulant whose immunobiological activity is mediated, in part, by an increase in the number and function of macrophages. In studying the role of glucan as a mediator of antibacterial activity, we attempted to ascertain the ability of glucan to modify the mortality of mice with experimentally induced Gram-positive bacteremia, and to enhance antibacterial defenses in rats as denoted by serum lysozyme and phagocytic activity. After intravenous administration of glucan, serum lysozyme concentrations were increased approximately sevenfold over control concentrations. The increase in serum lysozyme appeared to parallel the glucan-induced increase in phagocytosis and induced hyperplasia of macrophages. Prior treatment of mice with glucan significantly enhanced their survival when they were challenged systemically with Staphylococcus aureus. These studies indicate that glucan confers an enhanced state of host defense against bacterial infections.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kokoshis, P L -- Williams, D L -- Cook, J A -- Di Luzio, N R -- New York, N.Y. -- Science. 1978 Mar 24;199(4335):1340-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/628841" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bacteriolysis/drug effects ; Immunotherapy ; Macrophages/drug effects ; Male ; Muramidase/*blood ; Phagocytosis/*drug effects ; Polysaccharides/*pharmacology/therapeutic use ; Rats ; Sepsis/prevention & control ; Staphylococcal Infections/*prevention & control/therapy ; Staphylococcus aureus
    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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  • 3
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    Vascular smooth muscle cell kinetics: a new assay for studying patterns of cellular proliferation in vivo (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-08-31
    Description: A new quantitative assay for studying the kinetics of vascular smooth muscle cells in vivo is reported. The assay was used to determine the specific activity of DNA from rabbit aortic smooth muscle cells stimulated to grow by removal of the endothelial layer. The specific activity of the DNA was correlated with the rate of tritiated thymidine incorporation as measured by autoradiography and with the rate of DNA synthesis as estimated by direct measurement of cellular proliferation. Smooth muscle cells exhibit a 24-hour latent period in vivo prior to DNA synthesis; the synthesis peaks at 48 hours and then rapidly declines. The decline in DNA synthesis is not related to endothelial regrowth, and may be of homeostatic significance in limiting luminal stenosis. The assay offers a rapid and reliable alternative to autoradiographic and morphometric techniques for evaluating growth kinetics and growth regulation in vivo.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Goldberg, I D -- Stemerman, M B -- Schnipper, L E -- Ransil, B J -- Crooks, G W -- Fuhro, R L -- New York, N.Y. -- Science. 1979 Aug 31;205(4409):920-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/472713" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Aorta/*cytology ; Arteriosclerosis/metabolism/pathology ; Cell Division ; DNA/biosynthesis ; Endothelium/cytology ; Male ; Muscle, Smooth/*cytology/metabolism ; Rabbits
    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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  • 4
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    Inherited epilepsy: spike-wave and focal motor seizures in the mutant mouse tottering (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-06-22
    Description: Mice with the mutant gene tottering (tg, chromosome 8, autosomal recessive) show, in adolescence, abnormal bursts of bilaterally synchronous spike waves as revealed in electrocorticograms recorded over long periods. The spike waves are accompanied by behavioral "absence" attacks and intermittent focal motor seizures showing somatotopic progression. Cerebral metabolic activity during seizures was assayed by autoradiography of brain sections from mice injected intravenously with 14C-labeled 2-deoxyglucose. Metabolic activity was increased bilaterally in selected brainstem structures. Spontaneous electrocorticographic and clinical seizures of this general pattern were recognized hitherto only in humans.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Noebels, J L -- Sidman, R L -- New York, N.Y. -- Science. 1979 Jun 22;204(4399):1334-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/572084" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Animals ; Behavior/*physiology ; Brain/growth & development/physiopathology ; Electrocardiography ; Epilepsy/*genetics/physiopathology ; Humans ; Mice ; Mice, Neurologic Mutants/genetics/*physiology ; Neural Pathways/physiopathology ; Seizures/physiopathology ; Stereotyped Behavior/*physiology
    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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  • 5
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    Pigeons have magnets (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-09-07
    Description: Research on pigeon homing suggests that magnetic field information is used for orientation. The ability of pigeons to sense magnetic fields may be associated with a small, unilateral structure between the brain and the skull which contains magnetic in what appears to be single domains.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Walcott, C -- Gould, J L -- Kirschvink, J L -- New York, N.Y. -- Science. 1979 Sep 7;205(4410):1027-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/472725" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/physiology ; Columbidae/*physiology ; Head/physiology ; *Magnetics ; Orientation/*physiology
    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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    Intracellular translocation of iodine-125-labeled insulin: direct demonstration in isolated hepatocytes (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-05-19
    Description: Insulin labeled with iodine-125 binds to receptors on isolated rat hepatocytes. At low temperatures initial binding is restricted to the plasma membrane as detected by direct quantitative autoradiographic analysis with the electron microscope. With increasing time and temperature of incubation there is a systematic and progressive translocation of autoradiographic grains to a highly limited area of the cell periphery representing no more than 15% of the radius of the cell.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gorden, P -- Carpentier, J L -- Freychet, P -- LeCam, A -- Orci, L -- New York, N.Y. -- Science. 1978 May 19;200(4343):782-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/644321" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Membrane/metabolism ; Endocytosis ; Insulin/*metabolism ; Kinetics ; Liver/*metabolism/ultrastructure ; Lymphocytes/metabolism ; Lysosomes/metabolism ; Molecular Weight ; Rats ; Receptor, Insulin/*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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  • 7
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    Cat color vision: the effect of stimulus size (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-03-17
    Description: Adult cats were trained to discriminate blue from green and gray. Although the cats could discriminate the intensity of stimuli whose areas ranged from 33 to 0.36 square centimeters they could not discriminate color when the stimulus was 0.36 square centimeter (less than 20 degrees visual angle). This influence of stimulus size may account for both positive and negative results of previous studies.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Loop, M S -- Bruce, L L -- New York, N.Y. -- Science. 1978 Mar 17;199(4334):1221-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/628838" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cats/*physiology ; Color Perception/*physiology ; Discrimination (Psychology)/physiology ; Retina/physiology ; Size Perception/physiology ; Visual Fields
    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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    Microtubules in prokaryotes (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-06-09
    Description: Longitudinally aligned microtubules, about 220 A in diameter, have been seen in the protoplasmic cylinders of the following spirochetes (symbiotic in the hindguts of dry-wood and subterranean termites): Pillotina sp., Diplocalyx sp., Hollandina sp. They are also present in a gliding bacterium from Pterotermes occidentis. These microtubules are probably composed of tubulin, as determined by staining with fluorescent antibodies to tubulin and comigration with authentic tubulin on acrylamide gels. Treponema reiteri lack tubulin by these same criteria. These observations support the hypothesis of the symbiotic origin of cilia and flagella from certain spirochetes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Margulis, L -- To, L -- Chase, D -- New York, N.Y. -- Science. 1978 Jun 9;200(4346):1118-24.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/349692" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bacteria/*ultrastructure ; Fluorescent Antibody Technique ; Insects/microbiology ; Microtubules/*ultrastructure ; Spirochaetales/metabolism/*ultrastructure ; Tubulin/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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  • 9
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    DNA synthesis in cartilage cells is stimulated by oscillating electric fields (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-02-10
    Description: External oscillating electric fields (1166 volts per centimeter, 5 hertz) enhanced the incorporation of [3H] thymidine into the DNA of chondrocytes isolated from the proliferative layer of embryonic (16 days) chick epiphysis. Verapamil or tetrodotoxin at 10(-6)M concentrations completely blocked the electric field effect. Tetracaine reduced the incorporation of [3H] thymidine in both control and electrically stimulated cells. The findings support the hypothesis that Na and Ca2 fluxes generated by the electrical perturbation trigger DNA synthesis in these cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rodan, G A -- Bourret, L A -- Norton, L A -- New York, N.Y. -- Science. 1978 Feb 10;199(4329):690-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/625660" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Calcium/pharmacology ; Cartilage/*metabolism/physiology ; Chick Embryo ; DNA/*biosynthesis ; Electric Stimulation ; *Electricity ; Membrane Potentials ; Skin/metabolism ; Sodium/antagonists & inhibitors ; Tetrodotoxin/pharmacology ; Verapamil/pharmacology
    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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    Orientation anisotropy of visual stimuli in rhesus monkey: a behavior study (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-08-03
    Description: The contrast sensitivity of the rhesus monkey was tested, according to a modified reaction-time paradigm, for sine-wave grating targets at different orientations. The monkey possesses an oblique effect slightly larger than that of humans. A reaction time analysis showed the oblique effect to be a suprathreshold as well as a threshold phenomenon. The presence of this effect further strengthens the use of the monkey as a model for the human visual system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Boltz, R L -- Harwerth, R S -- Smith, E L 3rd -- R01 EY001139/EY/NEI NIH HHS/ -- New York, N.Y. -- Science. 1979 Aug 3;205(4405):511-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/109923" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Behavior, Animal ; Haplorhini ; Humans ; Macaca mulatta ; Species Specificity ; *Visual Perception
    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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