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  • Time Factors  (10)
  • American Association for the Advancement of Science (AAAS)  (10)
  • Periodicals Archive Online (PAO)
  • 1980-1984  (10)
  • 1955-1959
  • 1940-1944
  • 1981  (10)
  • 1957
  • 1941
Collection
Keywords
Publisher
  • American Association for the Advancement of Science (AAAS)  (10)
  • Periodicals Archive Online (PAO)
Years
  • 1980-1984  (10)
  • 1955-1959
  • 1940-1944
Year
  • 1
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    Noise raises blood pressure without impairing auditory sensitivity (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-03-27
    Description: Two rhesus monkeys, exposed continuously to realistic patterns and levels of noise for 9 months, exhibited sustained elevations in blood pressure that did not return to baseline values after the noise ended. Auditory brainstem responses, measured before and after exposure, indicated no change in auditory sensitivity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Peterson, E A -- Augenstein, J S -- Tanis, D C -- Augenstein, D G -- New York, N.Y. -- Science. 1981 Mar 27;211(4489):1450-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7466404" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Blood Pressure ; Evoked Potentials, Auditory ; Female ; *Noise ; 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)
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  • 2
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    A photobiological evaluation of tanning booths (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-01-23
    Description: The use of tanning booths as a substitute for natural sunlight is becoming increasingly popular. However, unless careful attention is paid to proper design and maintenance, the radiation field inside a tanning booth can be highly anisotropic. The use of simple, inexpensive ultraviolet radiation meters to measure dosage can lead to serious overexposure. Since the ultraviolet radiation inside a tanning booth has a greater proportion of short wavelengths (less than 300 nanometers) than natural sunlight, the amount of skin cancer-inducing radiation received for a tan may be twice that received for a natural suntan.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nachtwey, D S -- Rundel, R D -- New York, N.Y. -- Science. 1981 Jan 23;211(4480):405-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7221547" target="_blank"〉PubMed〈/a〉
    Keywords: Dose-Response Relationship, Radiation ; Erythema/etiology ; Humans ; *Light ; Photometry ; Skin/*radiation effects ; Sunburn/*etiology ; Time Factors ; *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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  • 3
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    GABA analogues activate channels of different duration on cultured mouse spinal neurons (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-04-17
    Description: Voltage-clamp recordings from mouse spinal neurons grown in culture were used to study the membrane current fluctuations induced by 12 substances structurally similar to gamma-aminobutyric acid (GABA). Fluctuation analysis provided estimates of the electrical properties of the elementary events underlying these responses. Estimates of the mean conductance of channels activated by all of the substances except glycine did not differ significantly from that estimated for GABA, whereas mean durations of agonist-activated channels all differed significantly from that found for GABA. The results indicate that all of the substances tested except glycine activate channels of similar conductance but of different durations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barker, J L -- Mathers, D A -- New York, N.Y. -- Science. 1981 Apr 17;212(4492):358-61.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6259733" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Membrane/drug effects ; Ion Channels/*drug effects ; Membrane Potentials/drug effects ; Mice ; Neurons/drug effects ; Receptors, Cell Surface/metabolism ; Receptors, GABA-A ; Spinal Nerves/*drug effects ; Structure-Activity Relationship ; Time Factors ; gamma-Aminobutyric Acid/*analogs & derivatives/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)
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  • 4
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    The hormonal control of sexual development (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-03-20
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wilson, J D -- George, F W -- Griffin, J E -- AM03892/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1981 Mar 20;211(4488):1278-84.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7010602" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anti-Mullerian Hormone ; Estradiol/metabolism/*physiology ; Female ; *Glycoproteins ; Gonadotropins/physiology ; *Growth Inhibitors ; Humans ; Male ; Morphogenesis ; Mullerian Ducts ; Ovary/embryology ; Rabbits ; Receptors, Androgen/metabolism ; *Sex Differentiation ; Testicular Hormones/*physiology ; Testis/embryology/secretion ; Testosterone/metabolism/*physiology ; Time Factors ; Urogenital System/embryology ; Wolffian Ducts
    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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    In vivo carbon-13 nuclear magnetic resonance studies of mammals (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-11-06
    Description: Natural abundance carbon-13 nuclear magnetic resonances (NMR) from human arm and rat tissues have been observed in vivo. These signals arise primarily from triglycerides in fatty tissue. Carbon-13 NMR was also used to follow, in a living rat, the conversion of C-1-labeled glucose, which was introduced into the stomach, to C-1-labeled liver glycogen. The carbon-13 sensitivity and resolution obtained shows that natural abundance carbon-13 NMR will be valuable in the study of disorders in fat metabolism, and that experiments with substrates labeled with carbon-13 can be used to study carbohydrate metabolism in vivo.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Alger, J R -- Sillerud, L O -- Behar, K L -- Gillies, R J -- Shulman, R G -- Gordon, R E -- Shae, D -- Hanley, P E -- AM27121/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1981 Nov 6;214(4521):660-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7292005" target="_blank"〉PubMed〈/a〉
    Keywords: Adipose Tissue/drug effects ; Animals ; Carbon/*metabolism ; Carbon Isotopes ; Glucose/metabolism ; Humans ; Liver Glycogen/metabolism ; Magnetic Resonance Spectroscopy/*methods ; Models, Structural ; Rats ; 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)
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  • 6
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    Modification of the discharge of vagal cardiac neurons during learned heart rate change (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-10-16
    Description: Visually conditioned heart rate change in the pigeon has been developed as a vertebrate model system for the cellular neurophysiological analysis of associative learning. In previous studies of the "final common path," it was shown that both the vagal and sympathetic cardiac innervations contribute to this response. The present experiments indicate that, prior to any behavioral training, the visual stimulus elicits a small decrease in the discharge of vagal cardiac neurons. During conditioning, this stimulus evokes a progressively greater decrease in discharge that parallels the acquisition of the conditioned cardioacceleration. In contrast, nonassociative control animals show habituation of the initial decrease in discharge. These data confirm the involvement of the vagal cardiac innervation in conditioned heart rate change, indicate that the vagal innervation acts synergistically with the sympathetic to produce cardioacceleration, and suggest that a short-latency pathway mediates the conditioned response.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gold, M R -- Cohen, D H -- P01 NS 14620/NS/NINDS NIH HHS/ -- T32 HL07284/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1981 Oct 16;214(4518):345-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7280698" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Animals ; Association Learning/*physiology ; Columbidae/physiology ; Conditioning (Psychology)/physiology ; Heart/*innervation ; Heart Rate ; Learning/*physiology ; Light ; Time Factors ; Vagus Nerve/*physiology ; Visual Pathways/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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  • 7
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    Long-term stress-induced analgesia and activation of the opiate system (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-09-18
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Grau, J W -- Hyson, R L -- Maier, S F -- Madden, J 4th -- Barchas, J D -- New York, N.Y. -- Science. 1981 Sep 18;213(4514):1409-11.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7268445" target="_blank"〉PubMed〈/a〉
    Keywords: Analgesia ; Animals ; Electroshock ; Endorphins/antagonists & inhibitors/*physiology ; Naltrexone/pharmacology ; Pain/*physiopathology ; Rats ; Stress, Physiological/*physiopathology ; Tail ; Time Factors
    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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    Phototherapy-induced hypocalcemia in newborn rats: prevention by melatonin (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-11-13
    Description: When young rats are exposed to white fluorescent light the concentration of calcium in their serum decreases. This effect is prevented by shielding the occiput, by inhibiting corticosterone synthesis, and by exogenous melatonin. Furthermore, the expected hypocalcemic response to cortisol injection is prevented by melatonin. Light-induced hypocalcemia may result from increased calcium uptake by bone when the blocking effect of melatonin decreases after pineal inhibition by transcranial illumination.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hakanson, D O -- Bergstrom, W H -- New York, N.Y. -- Science. 1981 Nov 13;214(4522):807-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6895262" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Newborn/*radiation effects ; Disease Models, Animal ; Female ; Humans ; Hydrocortisone/antagonists & inhibitors ; Hypocalcemia/etiology/*prevention & control ; Infant, Newborn ; Jaundice, Neonatal/therapy ; Light ; Male ; Melatonin/*pharmacology ; Phototherapy/adverse effects ; Rats ; Spectrum Analysis ; Time Factors
    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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    Paradoxical elevation of growth hormone by intraventricular somatostatin: possible ultrashort-loop feedback (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-03-06
    Description: Somatostatin, the growth hormone-inhibiting factor, when microinjected into the third ventricle of the rat brain, paradoxically induced the release of growth hormone. A pituitary site of action having been ruled out, this result supports the concept that exogenous somatostatin within the hypothalamus acts either to suppress the release of somatostatin from somatostatin-containing neurons, possibly via an ultrashort-loop feedback mechanism, or to augment release of hypothalamic growth hormone-releasing factor, thereby inducing a release of growth hormone. Injection of somatostatin into the third ventricle also decreased plasma concentrations of luteinizing hormone, follicle-stimulating hormone, and thyroid-stimulating hormone, probably by inhibiting the release of luteinizing hormone-releasing factor and thyrotropin-releasing factor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lumpkin, M D -- Gegro-Vilar, A -- McCann, S M -- AM-10073/AM/NIADDK NIH HHS/ -- HD-07062/HD/NICHD NIH HHS/ -- HD-09988/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1981 Mar 6;211(4486):1072-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6110244" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Castration ; Female ; Follicle Stimulating Hormone/blood ; Growth Hormone/*secretion ; Hypothalamus/*drug effects/secretion ; Injections, Intraventricular ; Luteinizing Hormone/blood ; Metabolic Clearance Rate ; Rats ; Somatostatin/administration & dosage/*pharmacology ; Thyrotropin/blood ; Time Factors
    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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    Temporal coding of species recognition signals in an electric fish (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-04-03
    Description: An electric fish in the African family Mormyridae recognizes members of its own species by "listening" to electric organ discharges, which are species-specific signatures. Reactions of fish in the field and of individual electroreceptors to both normal and modified computer-synthesized discharges emphasize the importance of the waveform (time-domain cues) in species recognition.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hopkins, C D -- Bass, A H -- MH26140/MH/NIMH NIH HHS/ -- NS06309/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1981 Apr 3;212(4490):85-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7209524" target="_blank"〉PubMed〈/a〉
    Keywords: *Animal Communication ; Animals ; Electric Organ/*physiology ; Female ; Fishes/*physiology ; Male ; Sex Factors ; Sexual Behavior, Animal/physiology ; Species Specificity ; 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)
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