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  • Articles  (138)
  • Latest Papers from Table of Contents or Articles in Press  (138)
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  • American Association for the Advancement of Science (AAAS)  (138)
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  • Articles  (138)
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  • American Association for the Advancement of Science (AAAS)  (138)
  • American Chemical Society
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  • Blackwell Publishing Ltd
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  • 2010-2014
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  • Computer Science  (138)
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  • 1
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    High concentrations of glutathione in glandular stomach: possible implications for carcinogenesis (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-09-07
    Description: In laboratory rodents, concentrations of reduced glutathione (GSH) are exceedingly high (up to 7 to 8 millimolar) in the glandular gastric tissue compared to concentrations in other portions of the gastrointestinal tract or to those of most other organs. Gastric GSH varies diurnally, with the highest levels occurring in the late afternoon or early evening. Starvation, treatment with diethyl maleate, or cold-restraint stress all caused marked decreases in stomach GSH, whereas treatment with cobaltous chloride caused an increase in the GSH concentrations. The physiological significance of the high gastric GSH is unknown, but because this endogenous compound may strongly modulate (decrease or increase) the macromolecular binding of certain chemicals capable of inducing stomach tumors, the possible role of glutathione in the pathogenesis of chemically induced gastric cancer should be considered.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Body, S C -- Sasame, H A -- Body, M R -- New York, N.Y. -- Science. 1979 Sep 7;205(4410):1010-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/572989" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Circadian Rhythm ; Cobalt/pharmacology ; Food Deprivation ; Glutathione/*metabolism ; Liver/metabolism ; Rats ; Stomach/*metabolism ; Stomach Neoplasms/*etiology ; Stress, Physiological/physiopathology
    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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    Pituitary-brain vascular relations: a new paradigm (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-04-06
    Description: Vascular casts of the pituitary gland have demonstrated a paucity of veins extending from the adenohypophysis to the systemic circulation and have suggested that some adenohypophyseal venous blood returns to the neurohypophysis. The neurohypophyseal capillary bed may function as a vascular switch and in this article a series of 14 questions are proposed regarding the vascular dynamics of the pituitary. Together these questions raise the larger question, namely, whether pituitary hormones are transported directly to the brain to modify brain function?〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bergland, R M -- Page, R B -- New York, N.Y. -- Science. 1979 Apr 6;204(4388):18-24.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/373118" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arteriovenous Anastomosis/anatomy & histology ; Capillaries/anatomy & histology ; Cats ; *Cerebrovascular Circulation ; Dogs ; Humans ; Hypothalamo-Hypophyseal System/blood supply ; Pituitary Gland/*blood supply ; Pituitary Gland, Anterior/blood supply ; Rats ; Species Specificity
    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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  • 3
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    Opioid peptides modulate luteinizing hormone secretion during sexual maturation (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-03-16
    Description: Subcutaneous injections of naloxone, an opiate antagonist, lead to an increase in serum luteinizing hormone concentrations in female but not in male rats before they reach puberty. In addition, estradiol benzoate specifically blocks the luteinizing hormone response to naloxone in prepubertal female rats, suggesting that the opioid peptides have a physiological role in the endocrine events leading to sexual maturation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Blank, M S -- Panerai, A E -- Friesen, H G -- New York, N.Y. -- Science. 1979 Mar 16;203(4385):1129-31.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/424743" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Endorphins/antagonists & inhibitors/*physiology ; Estradiol/pharmacology ; Female ; Luteinizing Hormone/blood/*secretion ; Male ; Naloxone/antagonists & inhibitors/pharmacology ; Rats ; Secretory Rate/drug effects ; Sexual Maturation/*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)
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  • 4
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    Brain stimulation reinforcement: implications of an electrode artifact (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-06-15
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cantor, M B -- New York, N.Y. -- Science. 1979 Jun 15;204(4398):1235-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/451570" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/*physiology ; Electric Stimulation ; Electrodes ; Methods ; Rats ; *Reinforcement (Psychology)
    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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    The forebrain is not essential for sympathoadrenal hyperglycemic response to glucoprivation (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-06-08
    Description: The reduction of glycolysis by hypoglycemia or the glucose analog 2-deoxy-D-glucose (2DG) stimulates compensatory sympathetic alterations of metabolism. Considerable attention has been focused on the hypothalamus as the probable locus of requisite metabolic signal detection. We report, however, that unanesthetized chronically decerebrate rats are capable of exhibiting sympathoadrenal hyperglycemia in response to the metabolic challenge presented by 2DG. This findings demonstrates that the forebrain is not necessary for glucoprivic stimulation of this reflex. Since cervical cord transection has been shown to eliminate hyperglycemia induced by 2DG, we conclude that the caudal brainstem contains an essential part of the neural mechanism which both detects metabolic need and ameliorates that need through the release of stored fuels.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉DiRocco, R J -- Grill, H J -- New York, N.Y. -- Science. 1979 Jun 8;204(4397):1112-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/451558" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenal Glands/physiology ; Afferent Pathways ; Animals ; Blood Glucose/*metabolism ; Brain Stem/*physiology ; Decerebrate State ; Deoxy Sugars/*pharmacology ; Deoxyglucose/*pharmacology ; *Energy Metabolism ; Hypothalamus/*physiology ; Rats ; Reflex/physiology ; Sympathetic Nervous System/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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    Superstitious bar pressing in hippocampal and septal rats (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-08-17
    Description: Unlike normal animals or those with sham lesions, rats with hippocampal and septal lesions behaved in an operant chamber as if a dependency existed between pellet delivery and their behavior, despite the fact that reinforcement was based on time, not behavior, and was therefore free. This superstitious behavior did not result from a general inability to inhibit responding, as responding rapidly ceased when the pellets were discontinued. These findings suggest that the hippocampus integrates information regarding response-reinforcer relations, which in the normal rat permits superfluous operant behavior to be eliminated.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Devenport, L D -- New York, N.Y. -- Science. 1979 Aug 17;205(4407):721-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/462183" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Behavior, Animal/*physiology ; Conditioning, Operant/physiology ; Hippocampus/*physiology ; Learning/physiology ; Rats ; Reinforcement (Psychology) ; Septal Nuclei/*physiology ; *Superstitions
    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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    Baroreceptor activation reduces reactivity to noxious stimulation: implications for hypertension (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-09-21
    Description: The hypothesis was tested that an acute rise of blood pressure may reduce reactivity to noxious stimuli through a baroreceptor-mediated reduction of cerebral arousal. When blood pressure was raised by an infusion of phenylephrine, rats showed less running to terminate or avoid noxious stimuli than during saline infusions. This effect was not seen in rats with denervated baroreceptors. The results suggest that a rise of blood pressure could have motivational consequences significant for human hypertension.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dworkin, B R -- Filewich, R J -- Miller, N E -- Craigmyle, N -- Pickering, T G -- New York, N.Y. -- Science. 1979 Sep 21;205(4412):1299-301.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/472749" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Avoidance Learning/drug effects/*physiology ; Blood Pressure/drug effects ; Heart Rate/drug effects ; Hypertension/*physiopathology ; Male ; Motivation/physiology ; Phenylephrine/pharmacology ; Pressoreceptors/*physiology ; Rats
    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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    Vomeronasal and olfactory system modulation of maternal behavior in the rat (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-01-26
    Description: The onset of maternal responsiveness by virgin female rats to foster pups was observed after (i) complete vomeronasal nerve cuts, (ii) partial olfactory bulb cuts, or (iii) the combined procedures. Although both vomeronasal nerve cuts and olfactory bulb cuts resulted in a more rapid onset of maternal care, relative to control animals with sham operations, animals sustaining the loss of both sources of olfactory input exhibited the shortest response latency. These findings are discussed in terms of the probable distinct functions of the two olfactory systems in the control of maternal behavior in the rat.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fleming, A -- Vaccarino, F -- Tambosso, L -- Chee, P -- New York, N.Y. -- Science. 1979 Jan 26;203(4378):372-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/760196" target="_blank"〉PubMed〈/a〉
    Keywords: Afferent Pathways ; Animals ; Central Nervous System/*physiology ; Female ; *Maternal Behavior ; Olfactory Bulb/physiology ; Olfactory Pathways/*physiology ; Rats ; Smell/*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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  • 9
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    Thiourea reverses cross-links and restores biological activity in DNA treated with dichlorodiaminoplatinum (II) (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-04-13
    Description: Cis and trans dichlorodiaminoplatinum (II) compounds bind to DNA and form DNA cross-links, which are usually considered to be irreversible. Thiourea can reverse these cross-links without any apparent breakdown of the DNA. In addition, cis- and trans-Pt (II) treatment of lambda decreases its transfectivity. After suitable incubation with thiourea, full transfectivity of Pt(II)-treated lambda DNA can be restored.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Filipski, J -- Kohn, K W -- Prather, R -- Bonner, W M -- New York, N.Y. -- Science. 1979 Apr 13;204(4389):181-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/571145" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Coliphages ; DNA/*metabolism ; DNA, Neoplasm/metabolism ; DNA, Viral/metabolism ; Leukemia L1210 ; Organoplatinum Compounds/*antagonists & inhibitors ; Structure-Activity Relationship ; Thiourea/*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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    Digitalis genin activity: side-group carbonyl oxygen position is a major determinant (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-08-31
    Description: The Na+,k+-adenosine triphosphatase-inhibiting activity of digitalis genins and their analogs is a function of side-group carbonyl (C = O) oxygen position. For each 2.2 angstroms that this oxygen is displaced from its position in digitoxigenin, activity drops by one order of magnitude. This quantitative relation resolves previously proposed models which have attempted to describe the molecular basis of genin activity. A multidisciplinary (crystallographic, conformational energy, synthetic, biological) approach to structure-activity relations is described.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fullerton, D S -- Yoshioka, K -- Rohrer, D C -- From, A H -- Ahmed, K -- New York, N.Y. -- Science. 1979 Aug 31;205(4409):917-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/224455" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/enzymology ; Digitalis Glycosides/*pharmacology ; Molecular Conformation ; Rats ; Sodium-Potassium-Exchanging ATPase/*antagonists & inhibitors ; Structure-Activity Relationship
    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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