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  • Articles  (3,265)
  • Animals  (2,203)
  • Humans  (1,574)
  • 1980-1984  (3,265)
  • 1925-1929
  • Natural Sciences in General  (3,265)
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  • Articles  (3,265)
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  • 101
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    Buprenorphine suppresses heroin use by heroin addicts (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-02-08
    Description: Heroin-dependent men were given buprenorphine (a partial opiate agonist-antagonist) or a placebo under duoble-blind conditions on a clinical research ward where they could acquire heroin (21 to 40.5 milligrams per day, intravenously). Buprenorphine significantly (P less than .001) suppressed the self-administration of heroin over 10 days. Control subjects took between 93 and 100 percent of the available heroin. The effects of buprenorphine were dose-dependent; a dose of 8 milligrams per day reduced heroin use by 69 to 98 percent; a dose of 4 milligrams per day reduced heroin use by 45 percent. Termination of buprenorphie maintenance did not result in opiate withdrawal signs or symptoms. The subjects liked buprenorphine and indicated that it was preferable to methadone or naltrexone. Buprenorphine should be a safe and effective new pharmacotherapy for heroin dependence.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mello, N K -- Mendelson, J H -- New York, N.Y. -- Science. 1980 Feb 8;207(4431):657-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7352279" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Buprenorphine/adverse effects/*therapeutic use ; Double-Blind Method ; Heroin Dependence/*drug therapy ; Humans ; Informed Consent ; Morphinans/*therapeutic use ; Substance Withdrawal Syndrome/prevention & control ; Substance-Related Disorders/prevention & control
    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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  • 102
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    Cell-free synthesis of acetylcholine receptor polypeptides (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-08-08
    Description: Messenger RNA coding for acetylcholine receptor peptides has been identified. This polyadenylate [poly(A)+]RNA from Torpedo californica directs, in a cell-free system, the synthesis of peptides 60,000, 51,000, 49,000 41,000, and 35,000 daltons which account for approximately 2 percent of the total synthesized proteins. The results suggest that several different messenger RNA's code for the receptor subunits. These proteins react specifically to antiserum to native acteylcholine receptor, suggesting that the primary translational product has conformational features similar to the native receptor. Further, the results support the idea that there is post-translational modification of receptor subunits as the molecular weights of the cell-free synthesized proteins differ from those of purified receptor subunits.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mendez, B -- Valenzuela, P -- Martial, J A -- Baxter, J D -- New York, N.Y. -- Science. 1980 Aug 8;209(4457):695-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7394526" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylcholine/*metabolism ; Animals ; Bungarotoxins/metabolism ; Cell-Free System ; Fishes ; *Metabolism ; *Peptide Biosynthesis ; Poly A/metabolism ; *Protein Biosynthesis ; RNA, Messenger ; Receptors, Cholinergic/*metabolism
    Print ISSN: 0036-8075
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  • 103
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    Regression of tumors in guinea pigs after treatment with synthetic muramyl dipeptides and trehalose dimycolate (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-04-25
    Description: A high incidence of tumor regression was observed in guinea pigs bearing transplantable, line-10 hepatocellular carcinomas when synthetic muramyl dipeptides combined with trehalose dimycolate in oil-in-water emulsions were injected directly into the tumors. These compounds are promising candidates to replace viable bacillus Calmette-Guerin in cancer immunotherapy in humans and animals.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McLaughlin, C A -- Schwartzman, S M -- Horner, B L -- Jones, G H -- Moffatt, J G -- Nestor, J J Jr -- Tegg, D -- New York, N.Y. -- Science. 1980 Apr 25;208(4442):415-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7189295" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylmuramyl-Alanyl-Isoglutamine/administration & dosage/*therapeutic use ; Animals ; Cord Factors/administration & dosage/*therapeutic use ; Drug Combinations ; Emulsions ; Glycolipids/*therapeutic use ; Glycopeptides/*therapeutic use ; Immunotherapy ; Liver Neoplasms, Experimental/*therapy ; Lymphatic Metastasis ; Structure-Activity Relationship
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  • 104
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    Mitochondrial water in myocardial ischemia: investigation with nuclear magnetic resonance (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-06-13
    Description: Nuclear magnetic resonance studies of mitochondria isolated from ischemic hearts after coronary vessel occlusion indicated a decrease in water proton relaxation times. This change coincided with a decrease in the hydration of the samples. It is suggested that in ischemia, changes in macromolecular hydration may be one of the first mechanisms to alter function in the mitochondria, which are vital to the energy-transducing process in heart muscle.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Michael, L H -- Seitz, P -- McMillin-Wood, J -- Chang, D -- Hazlewood, C -- Entman, M L -- New York, N.Y. -- Science. 1980 Jun 13;208(4449):1267-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6246584" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Fractionation/methods ; Coronary Disease/*metabolism/pathology ; Dogs ; Magnetic Resonance Spectroscopy ; Mitochondria, Heart/*metabolism ; Protons ; Water/*metabolism
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 105
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    Vomeronasal pump: significance for male hamster sexual behavior (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-03-14
    Description: Vomeronasal chemoreceptors segregated within the vomeronasal organ are important for male hamster sexual behavior. An autonomically controlled vascular pump, previously demonstrated in anesthetized animals, can transport stimuli to the receptors. Interruption of the efferent nerves controlling the pump results in behavioral deficits similar to those produced by interruption of the afferent nerves carrying information from the vomeronasal organ to the brain. Pump activation is thus a prerequisite for normal vomeronasal stimulation in behaving animals.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Meredith, M -- Marques, D M -- O'Connell, R O -- Stern, F L -- New York, N.Y. -- Science. 1980 Mar 14;207(4436):1224-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7355286" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chemoreceptor Cells/physiology ; Cricetinae/*physiology ; Efferent Pathways/physiology ; Male ; Nasal Septum/innervation/*physiology ; Nose/innervation/*physiology ; Sexual Behavior, Animal/drug effects/*physiology ; Zinc/pharmacology
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 106
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    Insertion of a new gene of viral origin into bone marrow cells of mice (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-05-30
    Description: DNA containing the herpes simplex virus thymidine kinase (HSVtk) gene was used to transform wild-type tk+ mouse L cells to a tk++ status in vitro using methotrexate as a selective agent. HSVtk DNA was also used to transform mouse bone marrow cells in vitro. Transformed marrow cells injected into irradiated and methotrexate-treated recipient mice gave rise to proliferating cells which in some cases dominated the marrow population and which contained HSVtk gene sequences.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mercola, K E -- Stang, H D -- Browne, J -- Salser, W -- Cline, M J -- New York, N.Y. -- Science. 1980 May 30;208(4447):1033-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6246577" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bone Marrow/*enzymology ; Bone Marrow Transplantation ; DNA, Viral/analysis ; Drug Resistance ; *Genes, Viral ; L Cells (Cell Line) ; Methotrexate/pharmacology ; Mice ; Simplexvirus/enzymology/*genetics ; Species Specificity ; Thymidine Kinase/*genetics ; *Transformation, Genetic
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  • 107
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    Evolutionary conservation of repetitive sequence expression in sea urchin egg RNA's (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-05-30
    Description: Cloned repetitive DNA sequences were used to determine the number of homologous RNA transcripts in the eggs of two sea urchin species, Strongylocentrotus purpuratus and S. franciscanus. The eggs of these species contain different amounts of RNA, and their genomes contain different numbers of copies of the cloned repeats. The specific pattern of repetitive sequence representation in the two egg RNA's is nonetheless quantitatively similar. The evolutionary conservation of this pattern suggests the functional importance of repeat sequence expression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Moore, G P -- Costantini, F D -- Posakony, J W -- Davidson, E H -- Britten, R J -- New York, N.Y. -- Science. 1980 May 30;208(4447):1046-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6154974" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Biological Evolution ; DNA, Recombinant ; Female ; Nucleic Acid Hybridization ; Ovum/physiology ; Plasmids ; RNA/*genetics ; Sea Urchins/*genetics ; Species Specificity ; Transcription, Genetic
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  • 108
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    Endogenous substrate for cyclic AMP-dependent protein kinase in adrenocortical polyadenylated messenger ribonucleoproteins (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-12-05
    Description: An endogenous polysomal cyclic AMP-dependent protein kinase specifically phosphorylates a 150,000-dalton peptide bound to an adrenocortical polyadenylated messenger ribonucleoprotein complex. There is a possibility that this protein is a physiological substrate of cyclic AMP-dependent protein kinase and that the phosphorylation and dephosphorylation of this substrate may be important in the translation control of adrenal polyadenylated messenger RNA.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Moore, R E -- Sharma, R K -- New York, N.Y. -- Science. 1980 Dec 5;210(4474):1137-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6255561" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenal Cortex/*metabolism ; Animals ; Cattle ; Cyclic AMP/metabolism ; Molecular Weight ; Nucleoproteins/*metabolism ; Phosphorylation ; Polyribosomes/metabolism ; Protein Kinases/*metabolism ; RNA, Messenger/*metabolism ; Ribonucleoproteins/*metabolism
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  • 109
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    Osmolality and potassium ion: their roles in initiation of sperm motility in teleosts (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-12-05
    Description: Spermatozoa that are quiescent in electrolyte and nonelectrolyte solutions isotonic to seminal plasma show motility when the semen is diluted with hypotonic solution in freshwater teleosts (four species tested) and with hypertonic solution in marine teleosts (five species tested). Decrease or increase, respectively, in osmolality of the environment may be the factor initiating sperm motility in these species. The motility of chum salmon spermatozoa in a sodium chloride solution isotonic to seminal plasma is completely suppressed by approximately 10 millimoles of potassium per kilogram; topminnow spermatozoa, however, were immotile in a nonelectrolyte solution, and motility was induced by electrolytes, especially potassium. Thus ions, rather than osmolality, may be an essential determinant of sperm motility in salmonid and viviparous teleosts.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Morisawa, M -- Suzuki, K -- New York, N.Y. -- Science. 1980 Dec 5;210(4474):1145-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7444445" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Fishes/*physiology ; Fresh Water ; Ions ; Male ; Osmolar Concentration ; Seawater ; Semen/physiology ; *Sperm Motility ; Spermatozoa/*physiology
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  • 110
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    Binding and factor XIIIa-mediated cross-linking of a 27-kilodalton fragment of fibronectin to Staphylococcus aureus (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-08-22
    Description: A 27-kilodalton tryptic fragment, derived from the amino terminus of the 200-kilodalton fibronectin subunit, inhibited binding of intact fibronectin to Staphylococcus aureus and could be cross-linked to Staphylococcus aureus by blood coagulation Factor XIIIa. Interactions of fibronectin with Staphylococcus aureus via this fragment may be important for bacterial opsonization and attachment.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mosher, D F -- Proctor, R A -- New York, N.Y. -- Science. 1980 Aug 22;209(4459):927-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7403857" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Factor XIII/*metabolism ; Fibronectins/*metabolism ; Humans ; Molecular Weight ; Opsonin Proteins ; Peptide Fragments ; Protein Binding ; Staphylococcus aureus/immunology/*metabolism ; Trypsin/metabolism
    Print ISSN: 0036-8075
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  • 111
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    Asbestos-induced epithelial changes in organ cultures of hamster trachea: inhibition by retinyl methyl ether (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-01-18
    Description: The epithelium of the hamster trachea in organ culture undergoes hyperplasia and squamous metaplasia after exposure to the amphibole types of asbestos, crocidolite and amosite. These changes are inhibited when the synthetic vitamin A analog, retinyl methyl ether, is incorporated into the culture medium. These findings suggest a possible use for retinoids in the prevention and treatment of respiratory tract disease associated with environmental exposure to asbestos.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mossman, B T -- Craighead, J E -- MacPherson, B V -- New York, N.Y. -- Science. 1980 Jan 18;207(4428):311-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7350661" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Asbestos/*antagonists & inhibitors ; Cell Division/drug effects ; Cell Transformation, Neoplastic/*drug effects ; Cricetinae ; Epithelium/pathology ; Female ; Metaplasia ; Organ Culture Techniques ; Trachea/*drug effects/pathology ; Vitamin A/*analogs & derivatives/pharmacology
    Print ISSN: 0036-8075
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  • 112
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    Animal anorexias (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-02-22
    Description: Eating very little in the presence of food or failure to serach for food has been documented in various species during the hibernation season, incubation, molting, and defense of the territory or harem. At these times feeding competes with other, more important activities. One way to avoid conflicts between feeding and these other activities to lower the programmed weight or set-point for body fat. Experiments on mammalian hibernators and incubating birds provide evidence that set-points are indeed lowered. Failure to eat in these two examples depends on anorexia, loss of appetite. A review of other examples suggests that conceptualization in terms of lowered set-points provides a unified and testable way of understanding many naturally occurring instances of fasting in the animal kingdom. Finally, spontaneous animal anorexias are contrasted with attempts by people to lose weight.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mrosovsky, N -- Sherry, D F -- New York, N.Y. -- Science. 1980 Feb 22;207(4433):837-42.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6928327" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anorexia/*veterinary ; Anorexia Nervosa/physiopathology ; Behavior, Animal/*physiology ; Birds/physiology ; Body Weight ; Disease Models, Animal ; Energy Metabolism ; Feeding Behavior/*physiology ; Feeding and Eating Disorders/*veterinary ; Hibernation ; Humans ; Maternal Behavior/physiology ; Obesity/physiopathology ; Rodentia/physiology ; Territoriality
    Print ISSN: 0036-8075
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  • 113
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    Cellular senescence in a cloned strain of bovine fetal aortic endothelial cells (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-02-22
    Description: The life-span in vitro and other proliferative characteristics of a strain of endothelial cells cloned from the aorta of a fetal calf were examined. Cultures of these cells had a replicative life-span of approximately 80 cumulative population doublings. Growth rates in the logarithmic phase and plateau densities decreased as the cumulative population-doubling level increased. After approximately 65 percent of the life-span of a culture was completed, the percentage of cells that incorporated [3H]thymidine during a 24-hour labeling period began to decrease rapidly. The cells expressed factor VIII antigen and their intercellular borders were stainable with silver nitrate throughout the life-span of each culture. Average cellular attachment size increased more than threefold between cumulative population-doubling levels 41 and 80. The facility with which cloned strains of endothelial cells can be isolated should encourage further exploitation of this important cell culture model.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mueller, S N -- Rosen, E M -- Levine, E M -- New York, N.Y. -- Science. 1980 Feb 22;207(4433):889-91.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7355268" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Aorta/cytology/embryology ; Cattle ; Cell Division ; *Cell Survival ; Cells, Cultured ; Clone Cells/*physiology ; Endothelium/*cytology ; Karyotyping
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  • 114
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    Stress-induced eating is mediated through endogenous opiates (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-09-12
    Description: The interaction of endogenous opiates and stress-induced eating in rats was evaluated by pharmacological manipulation. Eating induced by the tail-pinch method was inhibited by the opitate antagonist naloxone; after being repeatedly stressed over a 10-day period and then given nalozone, the rats behaved in a manner indistinguishable from the "wet-dog" shakes of opiate withdrawal. Thus endogenous opiates may have a role in the control of stress-related eating, a finding that may have therapeutic implications for humans.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Morley, J E -- Levine, A S -- New York, N.Y. -- Science. 1980 Sep 12;209(4462):1259-61.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6250222" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Behavior, Animal/drug effects ; Cholecystokinin/pharmacology ; Diazepam/pharmacology ; Eating/*drug effects ; Endorphins/antagonists & inhibitors/*physiology ; Male ; Naloxone/*pharmacology ; Rats ; Receptors, Opioid/drug effects ; Stress, Physiological/*physiopathology
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  • 115
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    Expression of a bacterial gene in mammalian cells (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-09-19
    Description: Transfection of cultured monkey kidney cells with recombinant DNA constructed with a cloned Escherichia coli gene that codes for xanthine-guanine phosphoribosyltransferase and several different SV40 DNA-based vectors, results in the synthesis of readily measurable quantities of the bacterial enzyme. Moreover, the physiological defect in purine nucleotide synthesis characteristic of human Lesch-Nyhan cells can be overcome by the introduction of the bacterial gene into these cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mulligan, R C -- Berg, P -- New York, N.Y. -- Science. 1980 Sep 19;209(4463):1422-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6251549" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Cloning, Molecular/methods ; DNA, Bacterial/*genetics ; *DNA, Recombinant ; Escherichia coli ; *Genes ; Haplorhini ; Humans ; Hypoxanthine Phosphoribosyltransferase/genetics ; Lesch-Nyhan Syndrome/*genetics ; Pentosyltransferases/*genetics ; Simian virus 40/genetics ; Transduction, Genetic ; Transformation, Genetic
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  • 116
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    Retinal tumor induced in the baboon by human adenovirus 12 (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-11-28
    Description: Three of 21 newborn baboons injected intraocularly with human adenovirus type 12 developed an intravitreal mass 12 to 36 months later. Two of the masses were indistinguishable from human retinoblastoma, a retinal tumor that afflicts children. To our knowledge this is the first time a retinoblastoma-like tumor has been induced experimentally by adenovirus type 12 in a nonhuman primate.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mukai, N -- Kalter, S S -- Cummins, L B -- Matthews, V A -- Nishida, T -- Nakajima, T -- EY-03170/EY/NEI NIH HHS/ -- RR-00036/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1980 Nov 28;210(4473):1023-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7434012" target="_blank"〉PubMed〈/a〉
    Keywords: *Adenoviruses, Human ; Animals ; Cell Transformation, Neoplastic/pathology ; Cell Transformation, Viral ; *Disease Models, Animal ; Eye Neoplasms/*microbiology ; Neoplasms, Experimental/microbiology ; Papio ; Retinoblastoma/*microbiology/pathology
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  • 117
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    Changes in endolymphatic potential and crossed olivocochlear bundle stimulation alter cochlear mechanics (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-10-03
    Description: Mechanical nonlinearity in the cochlea produces acuoustic distortion products that can be measured in the ear canal. These distortion products can be altered by changes in the endolymphatic potential as well as by stimulation of the crossed olivocochlear bundle, which provides efferent innervation to cochlear hair cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mountain, D C -- NS07025/NS/NINDS NIH HHS/ -- NS12732/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1980 Oct 3;210(4465):71-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7414321" target="_blank"〉PubMed〈/a〉
    Keywords: Acoustic Stimulation ; Animals ; Auditory Pathways ; Cochlea/*physiology ; *Cochlear Microphonic Potentials ; Cochlear Nerve/physiology ; Electrophysiology ; Endolymph/*physiology ; *Evoked Potentials, Auditory ; Guinea Pigs ; Hair Cells, Auditory/*physiology ; Labyrinthine Fluids/*physiology ; Olivary Nucleus/physiology ; Sound
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    Intercellular adhesion: coconstruction of contractile heart tissue by cells of different species (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-06-06
    Description: Dissociated embryonic rat myocardial cells and chick myocardial cells labeled with radioactive isotope coaggregate and establish intercellular junctions. These bispecific cells reconstruct synchronously beating myocardial tissue within 24 hours of culture.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nag, A C -- Cheng, M -- New York, N.Y. -- Science. 1980 Jun 6;208(4448):1150-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7375923" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Adhesion ; *Cell Aggregation ; Cells, Cultured ; Chickens ; Heart/*embryology ; Intercellular Junctions/ultrastructure ; Mosaicism ; Myocardial Contraction ; Myocardium/*cytology ; Rats ; Species Specificity
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    Mild cold exposure increases survival in rats with medial preoptic lesions (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-04-18
    Description: High mortality rate in rats with large medial preoptic lesions discourage their use in studies of brain function. However, virtually all such animals (six out of seven) survived indefinitely if kept at an ambient temperature of 15 degrees C for 2 hours before and 10 to 12 hours after the lesions were made. Although these rats appeared otherwise healthy, they could not maintain normal both temperatures in short-term cold tests. In contrast, five of the nine rats kept at 25 degrees C died within 10 hours after the operation, and three more died within 5 days. Rats kept at 25 degrees C had a much higher incidence of cardiac arrhythmias than did rats kept at 15 degrees C, which may be responsible for their higher moratlity rates.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nagel, J A -- Satinoff, E -- New York, N.Y. -- Science. 1980 Apr 18;208(4441):301-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7367860" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Body Temperature Regulation ; Brain/physiology ; *Cold Temperature ; Female ; Heart Rate ; Hypothalamus/*physiology ; Male ; Motor Activity/physiology ; Oxygen Consumption ; Preoptic Area/*physiology/surgery ; Rats ; Vasoconstriction
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    Asymmetry in facial expression (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-08-15
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nelson, C A -- Horowitz, F D -- New York, N.Y. -- Science. 1980 Aug 15;209(4458):834.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7403852" target="_blank"〉PubMed〈/a〉
    Keywords: Anthropometry ; Emotions ; *Facial Expression ; Female ; *Functional Laterality ; Humans ; Male
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    Social environment as a factor in diet-induced atherosclerosis (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-06-27
    Description: Rabbits on a 2 percent cholesterol diet were individually petted, held, talked to, and played with on a regular basis. Measurements of aortic affinity for a Sudan stain, serum cholesterol levels, heart rate, and blood pressure were made at the end of the experimental period. Compared to control groups, which were given the same diet and normal laboratory animal care, the experimental groups showed more than a 60 percent reduction in the percentage of aortic surface area exhibiting sudanophilic lesions, even though serum cholesterol levels, heart rate, and blood pressure were comparable.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nerem, R M -- Levesque, M J -- Cornhill, J F -- New York, N.Y. -- Science. 1980 Jun 27;208(4451):1475-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7384790" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Aorta/pathology ; Arteriosclerosis/*etiology/physiopathology/psychology ; Blood Pressure ; Cholesterol/blood ; *Diet, Atherogenic ; Heart Rate ; Male ; Rabbits ; *Social Environment
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    T-1 cells are HeLa and not of normal human kidney origin (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-08-08
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nelson-Rees, W A -- Flandermeyer, R R -- Daniels, D W -- New York, N.Y. -- Science. 1980 Aug 8;209(4457):719-20.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7394535" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Line ; Chromosome Banding ; HLA Antigens/analysis ; HeLa Cells/*cytology/immunology ; Humans ; Karyotyping ; Kidney/*cytology/immunology ; Metaphase
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    Cultivation in vitro of the quartan malaria parasite Plasmodium inui (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-09-12
    Description: The simian guartan malaria parasite Plasmodium inui (OS strain) was cultured in a continuous flow system with rhesus monkey erythrocytes and RPMI 1640nmedium supplemented with Hepes buffer and rhesus serum. Over a 10-week period, the growth of the parasite permitted a 61,000-fold cumulative dilution of the original inoculum. After 5 weeks in culture, the parasites were still infective to the monkey Saimiri sciureus and to Anopheles freeborni mosquitoes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nguyen-Dinh, P -- Campbell, C C -- Collins, W E -- New York, N.Y. -- Science. 1980 Sep 12;209(4462):1249-51.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6773146" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Erythrocytes/*parasitology ; Haplorhini/*parasitology ; Larva ; Macaca/*parasitology ; Plasmodium/cytology/*growth & development
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    J genes for heavy chain immunoglobulins of mouse (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-09-05
    Description: A 15,8-kilobase pair fragment of BALB/c mouse liver DNA, cloned in the Charon 4A lambda phage vector system, was shown to contain the mu heavy chain constant region (CHmu) gene for the mouse immunoglobulin M. In addition, this fragment of DNA contains at least two J genes, used to code for the carboxyl terminal portion of heavy chain variable regions. These genes are located in genomic DNA about eight kilobase pairs to the 5' side of the CHmu gene. The complete nucleotide sequence of a 1120-base pair stretch of DNA that includes the two J genes has been determined.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Newell, N -- Richards, J E -- Tucker, P W -- Blattner, F R -- New York, N.Y. -- Science. 1980 Sep 5;209(4461):1128-32.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6250219" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Binding Sites, Antibody/*genetics ; DNA Restriction Enzymes ; DNA, Recombinant ; Genes ; Genetic Linkage ; Immunoglobulin Heavy Chains/*genetics ; Immunoglobulin Variable Region/*genetics ; Immunoglobulin mu-Chains/*genetics ; Mice
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    Ethanol specifically potentiates GABA-mediated neurotransmission in feline cerebral cortex (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-08-08
    Description: Ethanol (ethyl alcohol) potentiates the inhibition of cortical neurons by gamma-aminobutyric acid. This effect is specific, since ethanol does not potentiate inhibiton by glycine, serotonin, or dopamine. These results have implications for alcoholism because (i) gamma-aminobutyric acid mediates anxiolytic mechanisms, and (ii) anxiety is implicated in the etiology of alcoholism.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nestoros, J N -- New York, N.Y. -- Science. 1980 Aug 8;209(4457):708-10.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7394531" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cats ; Cerebral Cortex/drug effects/*physiology ; Drug Synergism ; Electric Conductivity ; Electric Stimulation ; Ethanol/*pharmacology ; Female ; Male ; Neurons/drug effects/*physiology ; Serotonin/pharmacology ; gamma-Aminobutyric Acid/*pharmacology
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    Vitamin D deficiency inhibits pancreatic secretion of insulin (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-08-15
    Description: The effects of a vitamin D deficiency on insulin and glucagon release was determined in the isolated perfused rat pancreas by radioimmunoassay of the secreted proteins. During a 30-minute period of perfusion with glucose and arginine, pancreases from vitamin D-deficient rats exhibited a 48 percent reduction in insulin secretion compared to that for pancreases from vitamin D-deficient rats that had been replenished with vitamin D. Vitamin D status had no effect on pancreatic glucagon secretion. This result, along with the previously demonstrated presence in the pancreas of a vitamin D-dependent calcium-binding protein and cytosol receptor for the hormonal form of vitamin D, 1,25-dihydroxyvitamin D3, indicates an important role for vitamin D in the endocrine functioning of the pancreas.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Norman, A W -- Frankel, J B -- Heldt, A M -- Grodsky, G M -- New York, N.Y. -- Science. 1980 Aug 15;209(4458):823-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6250216" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arginine/pharmacology ; Cholecalciferol/*deficiency ; Glucagon/secretion ; Glucose/pharmacology ; Insulin/*secretion ; Islets of Langerhans/*secretion ; Rats ; Time Factors ; Vitamin D Deficiency/*metabolism
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    Feeding: satiety signal from intestine triggers brain's noradrenergic mechanism (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-08-29
    Description: Noradrenergic neurons in the hypothalamus involved in feeding and satiety are activated by gastrointestinal receptors. In the unrestrained rat, sites were first identified at which norepinephrine injected in the medial hypothalamus caused spontaneous feeding, or in the lateral hypothalamus caused no response. The activity of in vivo norepinephrine at these two sites was characterized by localized push-pull perfusion. When a nutrient was infused directly into the rat's duodenum, the synaptic release of hypothalamic norepinephrine was enhanced at lateral sites insensitive to norepinephrine, but suppressed at medial sites reactive to norepinephrine. Thus, signals from duodenal receptors are conceivably sent to the rat's brain to end feeding by way of noradrenergic inhibitory neurons in the hypothalamus.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Myers, R D -- McCaleb, M L -- New York, N.Y. -- Science. 1980 Aug 29;209(4460):1035-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7403866" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Duodenum/innervation/*physiology ; Feeding Behavior/physiology ; Glucose ; Hypothalamus/*physiology ; Norepinephrine/*physiology ; Rats ; Satiation/*physiology ; Satiety Response/*physiology ; Time Factors
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    Gene affecting superoxide dismutase activity linked to the histocompatibility complex in H-2 congenic mice (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-01-04
    Description: The activity of cyanide-sensitive, Cu-Zn superoxide dismutase (SOD) was studied in liver sytosols from H-2 congenic strains of mice. Higher SOD activity was found in livers of mice having H-2b/A.BY, B10, and C3H.SW/haplotypes than in those of H-2a, H-2k and H-2d haplotypes. Segregation studies supported these correlations. In H-2 recombinant strains of mice, the genes influencing the liver SOD activity occur, as ascertained by mapping techniques, at or near the H-2d region of the major histocompatibility complex.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Novak, R -- Bosze, Z -- Matkovics, B -- Fachet, J -- New York, N.Y. -- Science. 1980 Jan 4;207(4426):86-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7350646" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Evolution ; Genes ; Genes, Regulator ; Genetic Linkage ; H-2 Antigens/*genetics ; Liver/enzymology ; *Major Histocompatibility Complex ; Mice ; Superoxide Dismutase/*genetics
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    Specific antibodies: a potential insecticide (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-08-29
    Description: When tsetse flies are fed on human blood, the hemolymph of the flies contains human albumin. If the flies then ingest antibodies to human albumin, they die within a short time. The albumin fraction in their hemolymph disappears and osmoregulation is severely disturbed.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nogge, G -- Giannetti, M -- New York, N.Y. -- Science. 1980 Aug 29;209(4460):1028-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7403865" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Antibodies ; Hemolymph/metabolism ; Insect Control/*methods ; Serum Albumin/*immunology ; Tsetse Flies/*immunology/metabolism ; Water-Electrolyte Balance
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    Substance P: does it produce analgesia or hyperalgesia? (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-04-18
    Description: In the hot plate test, substance P given intravenously at doses of 5 x 10-5 and 5 x 10-4 gram per kilogram caused analgesia, while lower doses caused hyperalgesia. The influence of substance P on nociception depended on the individual mouse's sensitivity to pain (control response latency). Analgesia was produced by substance P administered to mice with high sensitivity to thermic stimulation, whereas hyperalgesia occurred in mice whose control latencies were longer than normal. This result is interpreted as an indication that substance P is capable of normalizing responsiveness to pain and could be classified as a regulatory peptide.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Oehme, P -- Hilse, H -- Morgenstern, E -- Gores, E -- New York, N.Y. -- Science. 1980 Apr 18;208(4441):305-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6154313" target="_blank"〉PubMed〈/a〉
    Keywords: Acetates ; Animals ; Dose-Response Relationship, Drug ; Hot Temperature ; Hyperalgesia/*chemically induced ; Hyperesthesia/*chemically induced ; Mice ; Nociceptors/drug effects ; Pain/*physiopathology ; Perception/*drug effects ; Receptors, Drug/physiology ; Substance P/*pharmacology
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    Calcium regulation during stimulus-secretion coupling: continuous measurement of intracellular calcium activities (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-07-25
    Description: Accurate measurements of intracellular calcium activities in salivary gland epithelial cells of the insect Phormia regina were obtained with microelectrodes in which N,N'-di(11-ethoxycarbonyl)undecyl-N,N'-4,5-tetramethyl-3,6-dioxaoctane diacid diamide wsa incorporated in a liquid membrane system. When calibrated in solutions approximating the ionic concentration of the cell interior, these microelectrodes gave rapid stable responses that were linear functions of the logarithm of calcium activities and were not affected by potassium, sodium and magnesium. Continuous monitoring of calcium activities during serotonin-induced saliva release provided direct evidence of hormonal influence on transmembrane calcium movement and spontaneous regulation of intracellular calcium by stimulated cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉O'Doherty, J -- Youmans, S J -- Armstrong, W M -- Stark, R J -- New York, N.Y. -- Science. 1980 Jul 25;209(4455):510-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7394518" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Transport/drug effects ; Calcium/*metabolism ; Diptera/*metabolism ; Epithelium/metabolism ; Kinetics ; Magnesium/pharmacology ; Microelectrodes ; Salivary Glands/drug effects/*metabolism ; Serotonin/pharmacology
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    Human monoclonal antibody against Forssman antigen (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-10-31
    Description: Hybrid cells formed between human lymphocytes and mouse myeloma cells produce human immunoglobulin in culture. Stable antibody-producing cell lines can be isolated after multiple cycles of low-density passage, cloning, and continued selection for immunoglobulin production. The origin and characteristics of a hybrid of human and mouse cells is described. This hybrid produces high concentrations (8.3 micrograms per milliliter) of human immunoglobulin M reactive with the terminal disaccharide of the Forssman glycolipid. These findings point to the potential use of human-mouse hybrid cells as a source of human monoclonal antibodies for therapeutic and diagnostic purposes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nowinski, R -- Berglund, C -- Lane, J -- Lostrom, M -- Bernstein, I -- Young, W -- Hakomori, S I -- Hill, L -- Cooney, M -- New York, N.Y. -- Science. 1980 Oct 31;210(4469):537-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7423202" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Antibodies ; Antibody Formation ; Antibody Specificity ; Cells, Cultured ; Clone Cells/immunology ; *Forssman Antigen ; Humans ; Hybrid Cells/immunology ; Immunoglobulin M/biosynthesis ; Mice
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    Visually induced self-motion sensation adapts rapidly to left-right visual reversal (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-08-08
    Description: After 1 to 3 hours of active movement while wearing vision-reversing goggles, 9 of 12 (stationary) human subjects viewing a moving stripe display experienced a self-rotation illusion in the same direction as seen stripe motion, rather than in the opposite (normal) direction. This result indicates that the neural pathways which process visual self-rotation cues can undergo rapid adaptive modification.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Oman, C M -- Bock, O L -- Huang, J K -- New York, N.Y. -- Science. 1980 Aug 8;209(4457):706-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7394530" target="_blank"〉PubMed〈/a〉
    Keywords: *Functional Laterality ; Humans ; *Movement ; Vision, Ocular ; Visual Pathways/physiology ; *Visual Perception
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    alpha-Lactalbumin-casein induction in virgin mouse mammary explants: dose-dependent differential action of cortisol (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-03-21
    Description: The interplay of insulin, cortisol, and prolactin induces synthesis of casein and alpha-lactalbumin in cultured mammary explants from mature virgin mice. A striking difference has been found between the optimal concentrations of cortisol required for maximal induction of the two milk proteins in vitro: 3 x 10(-8) molar for alpha-lactalbumin and 3 x 10(-6) molar for casein. Moreover, 10(-7) to 10(-5) molar cortisol caused progressive inhibition of alpha-lactalbumin accumulation. Such differential actions of cortisol may partly account for the asynchronous synthesis of the two proteins during pregnancy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ono, M -- Oka, T -- New York, N.Y. -- Science. 1980 Mar 21;207(4437):1367-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6986657" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Caseins/*biosynthesis ; Dose-Response Relationship, Drug ; Drug Interactions ; Female ; Hydrocortisone/*pharmacology ; Insulin/pharmacology ; Lactalbumin/*biosynthesis ; Mammary Glands, Animal/drug effects/*metabolism ; Mice ; Organ Culture Techniques ; Pregnancy ; Prolactin/pharmacology
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    DDT contamination at Wheeler National Wildlife Refuge (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-07-25
    Description: Disposal of industrial waste resulted in massive DDT contamination at Wheeler National Wildlife Refuge, Alabama. Nearly a decade after the cessation of DDT manufacturing at the facility responsible, concentrations of DDT residues in the local fauna are still high enough to suggest avian reproductive impairment and mortality. Populations of fish-eating birds are low, endangered species are being exposed, and muscle lipids of game birds contain up to 6900 parts of DDT (isomers and metabolites) per million.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉O'Shea, T J -- Fleming, W J -- Cromartie, E -- New York, N.Y. -- Science. 1980 Jul 25;209(4455):509-60.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7394517" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Birds ; DDT/*analysis ; Ducks ; *Industrial Waste ; Lipids/analysis ; Muscles/analysis ; Rabbits ; Species Specificity
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Osteoporosis: a cautionary note (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-04-18
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Orloff, S -- Manicourt, D -- New York, N.Y. -- Science. 1980 Apr 18;208(4441):240.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7367856" target="_blank"〉PubMed〈/a〉
    Keywords: Bone and Bones/physiopathology ; Calcinosis ; Collagen/physiology ; Humans ; Osteoporosis/*physiopathology
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  • 137
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    Kindling induces long-lasting alterations in response of hippocampal neurons to elevated potassium levels in vitro (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-06-13
    Description: The cellular basis of kindling was studied electrophysiologically with slices of guinea pig hippocampus. Normally, epileptiform activity can be induced in the slices only by combined exposure to elevated potassium levels and a chemical convulsant such as penicillin. In hippocampal slices from pentylenetetrazole-kindled animals, however, elevated potassium alone can induce seizures. These data suggest that kindling elicits long-term changes in neuronal excitability that may involve ionic mechanisms.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Oliver, A P -- Hoffer, B J -- Wyatt, R J -- New York, N.Y. -- Science. 1980 Jun 13;208(4449):1264-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7375936" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Dose-Response Relationship, Drug ; Epilepsy/chemically induced/*physiopathology ; Guinea Pigs ; Hippocampus/drug effects/*physiology ; In Vitro Techniques ; Male ; Neurons/drug effects/physiology ; Pentylenetetrazole/administration & dosage/pharmacology ; Potassium/*pharmacology
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  • 138
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    Properties of a normal mouse cell DNA sequence (sarc) homologous to the src sequence of Moloney sarcoma virus (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-03-14
    Description: A 15.0-kilobase (kb) Eco RI DNA fragment from normal mouse Balb/c genomic DNA that contains sequences (sarc) homologous to the acquired cell sequences (src) of Moloney sarcoma virus (MSV) has been cloned in phage lambda. The sarc region (1.2 to 1.3 kb) of the 15.0-kb cell fragment is indistinguishable from the src region of two isolates of MSV as judged by heteroduplex and restriction endonuclease analyses. The cellular sequences flanking sarc show no homology to other MSV sequences. Whereas cloned subgenomic portions of MSV that contain src transformed NIH-3T3 cells in vitro, the cloned sarc fragment is inactive.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Oskarsson, M -- McClements, W L -- Blair, D G -- Maizel, J V -- Vande Woude, G F -- New York, N.Y. -- Science. 1980 Mar 14;207(4436):1222-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6243788" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Chromosome Mapping ; DNA Restriction Enzymes ; *Genes ; *Genes, Viral ; Mice ; Mice, Inbred BALB C/*genetics ; Moloney murine leukemia virus/*genetics ; Nucleic Acid Hybridization
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  • 139
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    Cytosolic and microsomal epoxide hydrolases: differential properties in mammalian liver (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-03-28
    Description: The epoxide hydrolase activities of the 100,000 g pellet (microsomal) and 100,00 g soluble (cystosolic) fractions of mouse, rat, and guinea pig liver were measured with three closely related compounds used as substrates. Differences between the species in the distribution of the cytosolic and microsomal hydrolases and in their substrate specificities and pH optima demonstrate why epoxide hydrolase activity in the cytosolic fraction was not detected earlier in spie of intensive work on the microsomal epoxide hydrolase.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ota, K -- Hammock, B D -- New York, N.Y. -- Science. 1980 Mar 28;207(4438):1479-81.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7361100" target="_blank"〉PubMed〈/a〉
    Keywords: Allyl Compounds ; Animals ; Benzene ; Cytosol/enzymology ; Epoxide Hydrolases/*metabolism ; Guinea Pigs ; Hydrogen-Ion Concentration ; Liver/*enzymology/ultrastructure ; Mice ; Microsomes, Liver/enzymology ; Rats ; Styrenes ; Substrate Specificity
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  • 140
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    Genes for growth hormone, chorionic somatommammotropin, and growth hormones-like gene on chromosome 17 in humans (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-07-11
    Description: The human genes for growth hormone (GH), chorionic somatomammotropin (CSH), and a third growth hormone-like gene (GHL) have been located on chromosome 17 in humans. DNA fragments of 2.6, 2.8, and 9.5 kilobase pairs containing GH, CSH, and GHL, respectively, were identified in human genomic DNA, and a 7.5-kilobase DNA fragment related to growth hormone DNA sequences was found in mouse cells. In somatic hybrids of human and mouse cells containing reduced numbers of human chromosomes, but a normal complement of mouse chromosomes, the mouse, 7.5-kolobase DNA fragment was always present, whereas the 2.6-, 2.8-, and 9.5-kilobase human fragments were present only when human chromosome 17 was also present.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Owerbach, D -- Rutter, W J -- Martial, J A -- Baxter, J D -- Shows, T B -- New York, N.Y. -- Science. 1980 Jul 11;209(4453):289-92.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7384802" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Cell Line ; *Chromosomes, Human, 16-18 ; *DNA/metabolism ; *Genes ; Growth Hormone/*biosynthesis ; Humans ; Hybrid Cells/metabolism ; Mice ; Placental Lactogen/*biosynthesis ; Translocation, Genetic
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    Beta-adrenergic-receptor localization by light microscopic autoradiography (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-06-20
    Description: beta-Receptors were identified in rat brain by a light microscopic autoradiographic technique. The procedure involved binding 3H-labeled dihydroalprenolol to beta-receptors in intact slide-mounted tissue sections and generating autoradiograms by the apposition of emulsion-coated cover slips, Biochemical analysis of the binding indicated that these conditions provided a high degree of selective labeling of beta-receptors. High densities of receptors were found in superficial layers of the cerebral cortex, throughout the caudate-putamen, in the periventricular nucleus of the thalamus, in the molecular layer of the cerebellum, and in other areas. These results are in agreement with other electrophysiological and histochemical data. This radiohistochemical approach should be an important addition to other methods for mapping functional catecholamine neuronal pathways and sites of hormonal action.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Palacios, J M -- Kuhar, M J -- New York, N.Y. -- Science. 1980 Jun 20;208(4450):1378-80.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6246585" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Autoradiography/*methods ; *Brain Chemistry ; Cerebellum/metabolism ; Cerebral Cortex/metabolism ; Corpus Striatum/metabolism ; Dihydroalprenolol/metabolism ; Hippocampus/metabolism ; Microscopy ; Norepinephrine/metabolism ; Rats ; Receptors, Adrenergic/*analysis ; Receptors, Adrenergic, beta/*analysis
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  • 142
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    Flavor-illness aversions: the peculiar roles of odor and taste in memory for poison (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-05-16
    Description: When either taste or odor alone was followed by poison, rats acquired a strong aversion for the taste but not for odor, especially if poison was delayed. When odor-taste combinations were poisoned, however, odor aversions were potentiated, as if odor could gain the enduring memorial property of taste by associative contiguity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Palmerino, C C -- Rusiniak, K W -- Garcia, J -- New York, N.Y. -- Science. 1980 May 16;208(4445):753-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7367891" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Avoidance Learning/*physiology ; Conditioning (Psychology)/physiology ; Lithium/poisoning ; Male ; Rats ; Smell/*physiology ; Taste/*physiology ; Time Factors
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    Brain events underlying detection and recognition of weak sensory signals (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-10-03
    Description: Through the use of a quantitative extension of signal detection theory, the brain events associated with the detection and recognition of weak acoustic signals were examined by recording brain event-related potentials. The early N100 componenet of the event-related potential varied only with detection, whereas the late P300 component varied with both detection and recognition. P300 amplitude accurately predicted recognition performance on a trial-by-trial basis. The results suggest that detection and recognition are partially concurrent processes in perception and demonstrate that the electrocortical events occurring during the perception of sensory stimuli are closely associated with both detection and recognition of these stimuli by the nervous system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Parasuraman, R -- Beatty, J -- New York, N.Y. -- Science. 1980 Oct 3;210(4465):80-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7414324" target="_blank"〉PubMed〈/a〉
    Keywords: Acoustic Stimulation ; Auditory Perception/*physiology ; Brain/*physiology ; Electroencephalography ; Electrooculography ; *Evoked Potentials, Auditory ; Humans ; Noise ; Sound
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    Inverse relation between low-density lipoprotein-cholesterol and dehydroisoandrosterone sulfate in human fetal plasma (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-05-02
    Description: A striking inverse correlation was found in umbilical cord plasma between the concentrations of dehydroisoandrosterone sulfate and low-density lipoprotein (LDL)-cholesterol but not high-density lipoprotein-cholesterol or very low density lipoprotein-cholesterol. Dehydroisoandrosterone sulfate is a major secretory product of the human fetal adrenal and the principal precursor of placental estrogen production. The data suggest that the concentrations for LDL-cholesterol in fetal plasma are influenced by the rate of utilization of LDL-cholesterol by the fetal adrenal for steroidogenesis and are not necessarily related to a genetic predisposition for hypercholesterolemia or other lipoprotein disorders.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Parker, C R Jr -- Simpson, E R -- Bilheimer, D W -- Leveno, K -- Carr, B R -- MacDonald, P C -- New York, N.Y. -- Science. 1980 May 2;208(4443):512-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6445079" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenal Cortex/metabolism ; Adrenal Cortex Hormones/secretion ; Cholesterol/*blood ; Dehydroepiandrosterone/*analogs & derivatives/blood/metabolism ; Dehydroepiandrosterone Sulfate ; Female ; Fetal Blood/*analysis ; Humans ; Hypertension/metabolism ; Lipoproteins, LDL/*blood/metabolism ; Maternal-Fetal Exchange ; Pregnancy ; Pregnancy Complications, Cardiovascular/metabolism
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    Opiate analgesia: evidence for mediation by a subpopulation of opiate receptors (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-05-02
    Description: Naloxazone, a hydrazone derivative of the opiate antagonist naloxone, has a high affinity for opiate receptor binding sites. Naloxazone injections reduce opiate receptor binding to extensively washed mouse brain membranes for more than 24 hours, suggesting that the effect is irreversible. High-affinity binding sites are abolished by this treatment, whereas low-affinity sites are unaffected. Naloxazone treatment blocks the analgesic effects of morphine for at least 24 hours but does not prevent death from high doses of morphine. Thus analgesic but nonlethal opiate effects may be mediated by the high-affinity subpopulation of opiate receptors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pasternak, G W -- Childers, S R -- Snyder, S H -- New York, N.Y. -- Science. 1980 May 2;208(4443):514-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6245448" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Binding Sites/drug effects ; Brain/metabolism ; Mice ; Morphine/pharmacology/toxicity ; Naloxone/adverse effects/*analogs & derivatives/pharmacology ; Receptors, Opioid/classification/*drug effects/physiology
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  • 146
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    Binocularity in the cat visual cortex is reduced by sectioning the corpus callosum (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-03-07
    Description: In the normal cat, most cells in area 17 can be binocularly driven. Sectioning the corpus callosum results in a significant reduction in binocularly driven cells. Normal binocular vision is thus dependent on the corpus callosum.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Payne, B R -- Elberger, A J -- Berman, N -- Murphy, E H -- New York, N.Y. -- Science. 1980 Mar 7;207(4435):1097-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7355278" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cats ; Corpus Callosum/*physiology/surgery ; Functional Laterality ; Time Factors ; Visual Fields ; Visual Pathways/physiology ; Visual Perception/*physiology
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  • 147
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    Environmental influences on body weight and behavior in developing rats after neonatal 6-hydroxydopamine (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-08-08
    Description: There is less hyperactive motor activity and better avoidance performance in rat pups treated with 6-hydroxydopamine as neonates and reared with vehicle-treated littermates than in pups reared in litters composed solely of other 6-hydroxydopamine-treated animals. Thus, in this experimental model of hyperactivity, an environmental manipulation provides an alternative to pharmacologic agents in reducing activity and improving learning performance.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pearson, D E -- Teicher, M H -- Shaywitz, B A -- Cohen, D J -- Young, J G -- Anderson, G M -- New York, N.Y. -- Science. 1980 Aug 8;209(4457):715-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7394533" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Newborn ; *Behavior, Animal/drug effects ; *Body Weight/drug effects ; Brain/drug effects/metabolism ; Catecholamines/metabolism ; *Environment ; Hydroxydopamines/*pharmacology ; Rats
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    Isolation of mutants of an animal virus in bacteria (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-09-19
    Description: Mutants of animal viruses can be isolated in bacteria by recombinant DNA methods. Since no viral functions are required for propagation of recombinants in bacteria, viral mutants with lethal changes in cis- or trans-acting elements can be isolated, as well as partially or conditionally defective mutants. In the cases of viruses with small DNA genomes, such as the tumorigenic simian virus 40 (SV40), the entire viral DNA can be inserted into the bacterial plasmid pBR322 and cloned in Escherichia coli. Recombinant plasmids with a single copy of SV40 DNA cause morphological transformation of mouse cells in culture with the same efficiency as SV40 DNA isolated from virus-infected monkey cells, but the recombinant DNA is noninfectious and replicates poorly in permissive cells. However, SV40 DNA excised from the plasmid replicates as well as authentic viral DNA and is fully infectious. SV40 mutants with small deletions or base substitutions have been isolated by in vitro site-specific or random local mutagenesis of recombinant DNA followed by cloning in E. coli. Many of the mutants thus isolated are defective in specific viral functions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Peden, K W -- Pipas, J M -- Pearson-White, S -- Nathans, D -- New York, N.Y. -- Science. 1980 Sep 19;209(4463):1392-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6251547" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, Neoplasm/*genetics ; Antigens, Viral/genetics ; Cell Transformation, Viral ; Cells, Cultured ; Chromosome Deletion ; DNA, Recombinant ; DNA, Viral/*genetics ; Escherichia coli ; *Mutation ; Simian virus 40/*genetics ; Viral Proteins/*genetics ; Virus Replication
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  • 149
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    Pro-adrenocorticotropin/endorphin-derived peptides: coordinate action on adrenal steroidogenesis (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-05-30
    Description: A synthetic peptide, representing a portion of the 16K (16,000 dalton)-fragment sequence within the pro-adrenocorticotropin/endorphin precursor molecule, potentiates the steroidogenic action of the 1 to 24 portion of adrenocorticotropin [ACTH(1-24)] on the rat adrenal cortex. The peptide has 27 amino acid residues and consists of gamma-melanotropin with a carboxyl terminal extension. It affects both the inner and outer adrenocortical zones of hypophysectomized animals, as evidenced by a synergistic augmentation of corticosterone and aldosterone production, respectively. The peptide can be distinguished from adrenocorticotropin by its activation of cholesterol ester hydrolase and its failure to stimulate cholesterol side-chain cleavage.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pedersen, R C -- Brownie, A C -- Ling, N -- New York, N.Y. -- Science. 1980 May 30;208(4447):1044-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6246578" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenal Cortex/*drug effects/metabolism ; Adrenal Cortex Hormones/*biosynthesis ; Adrenocorticotropic Hormone/*pharmacology ; Aldosterone/biosynthesis ; Animals ; Corticosterone/biosynthesis ; Endorphins/pharmacology ; Female ; Melanocyte-Stimulating Hormones/*pharmacology ; Molecular Weight ; Peptide Fragments/*pharmacology ; Protein Precursors/pharmacology ; Rats ; Sterol Esterase/metabolism
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  • 150
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    Opiates and opioid peptides hyperpolarize locus coeruleus neurons in vitro (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-07-18
    Description: Intracellular recordings were made from locus coeruleus neurons in a brain slice preparation. Opiates and opioid peptides produced a dose-dependent, stereospecific, naloxone-reversible hyperpolarization of the neuronal membrane. This was associated with an increase in membrane conductance.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pepper, C M -- Henderson, G -- New York, N.Y. -- Science. 1980 Jul 18;209(4454):394-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7384811" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Endorphins/*pharmacology ; *Enkephalin, Methionine/*analogs & derivatives ; Enkephalins/*pharmacology ; Guinea Pigs ; Locus Coeruleus/drug effects/*physiology ; Membrane Potentials/drug effects ; Morphine Derivatives/*pharmacology ; Naloxone/*pharmacology ; Neurons/drug effects/*physiology
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  • 151
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    Appraising psychotherapy (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-02-22
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Parloff, M B -- New York, N.Y. -- Science. 1980 Feb 22;207(4433):823.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7356844" target="_blank"〉PubMed〈/a〉
    Keywords: Government Agencies ; Humans ; Psychotherapy/*standards ; United States
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  • 152
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    Bladder-surface glycosaminoglycans: an efficient mechanism of environmental adaptation (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-05-09
    Description: The transitional epithelium of the urinary bladder secretes and binds to its surface a glycosaminoglycan than inhibits the adherence of bacteria. Synthetic sulfonated glycosaminoglycans instilled intraluminally into bladders whose natural mucin layer has been removed are as effective as the natural mucin in preventing bacterial adherence. It also appears that adherence of calcium and protein is reduced in the presence of both the natural mucin layer and the synthetic sulfonated glycosaminoglycan sodium pentosanpolysulfate, suggesting that the antiadherence activity of both natural and synthetic surface glycosaminoglycans in the bladder extends to the molecular and ionic levels.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Parsons, C L -- Stauffer, C -- Schmidt, J D -- New York, N.Y. -- Science. 1980 May 9;208(4444):605-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6154316" target="_blank"〉PubMed〈/a〉
    Keywords: Adsorption ; Animals ; Calcium/metabolism ; Cell Adhesion ; Environmental Exposure ; Epithelium/physiology ; Glycosaminoglycans/*physiology ; Male ; Mucins/pharmacology ; Pentosan Sulfuric Polyester/pharmacology ; Protein Binding/drug effects ; Proteins/metabolism ; Rabbits ; Urinary Bladder/microbiology/*physiology
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  • 153
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    "Transdifferentiation" of C6 glial cells in culture (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-04-11
    Description: The activities of cyclic nucleotide phosphohydrolase, an enzyme marker for oligodendrocytes, and glutamine synthetase, an enzyme marker for astrocytes, were studied at early (21 to 26) and late (82 to 88) cell passages. The activity of cyclic nucleotide phosphohydrolase was markedly high and that of glutamine synthetase was low in the early passages, but this relation was reversed in the late passages. These findings suggest a "transdifferentiation" of C6 glial cells with passage in culture.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Parker, K K -- Norenberg, M D -- Vernadakis, A -- New York, N.Y. -- Science. 1980 Apr 11;208(4440):179-81.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6102413" target="_blank"〉PubMed〈/a〉
    Keywords: 2',3'-Cyclic-Nucleotide Phosphodiesterases/metabolism ; Animals ; Astrocytes/enzymology ; *Cell Differentiation ; Cells, Cultured ; Glutamate-Ammonia Ligase/metabolism ; Neuroglia/*enzymology ; Oligodendroglia/enzymology ; Rats
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  • 154
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    Lithium reduces the number of acetylcholine receptors in skeletal muscle (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-10-17
    Description: Extended treatment of rats with lithium inhibits the increase in the number of extrajunctional acetylcholine receptors that occurs in their denervated skeletal muscle. In normal muscle, lithium reduces the number of acetylcholine receptors at neuromuscular junctions. These changes appear to be a relatively specific effect of lithium on the turnover of receptors. Skeletal muscle provides an accessible system for analyzing the role of lithium (and other cations) in the regulation of cell surface receptors. This regulation may play a role in the mechanism by which lithium prevents recurrent manic-depressive episodes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pestronk, A -- Drachman, D B -- 5P01-NS10920/NS/NINDS NIH HHS/ -- 5R01-HD04817/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1980 Oct 17;210(4467):342-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7423198" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylcholine/metabolism ; Animals ; Female ; Lithium/*pharmacology ; Muscle Denervation ; Muscles/*drug effects/metabolism ; Neuromuscular Junction/drug effects ; Rats ; Receptors, Cholinergic/*metabolism
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  • 155
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    Alzheimer's disease: X-ray spectrometric evidence of aluminum accumulation in neurofibrillary tangle-bearing neurons (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-04-18
    Description: The elemental content of neurons of the hippocampus was studied by a combination of scanning electron microscopy and x-ray spectrometry in autopsy-derived brain tissue from three cases of senile dementia (Alzheimer type) and three nondemented elderly controls. Foci of aluminum were detected within the nuclear region of a high percentage of neurons containing neurofibrillary tangles from the cases of senile dementia as well as the elderly controls. The adjacent normal-appearing neurons from both groups of patients were virtually free of detectable aluminum. These findings suggest that the association of aluminum to Alzheimer's disease extends to the neuronal level.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Perl, D P -- Brody, A R -- New York, N.Y. -- Science. 1980 Apr 18;208(4441):297-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7367858" target="_blank"〉PubMed〈/a〉
    Keywords: Aluminum/*metabolism ; Alzheimer Disease/*metabolism/pathology ; Cell Nucleus/metabolism ; Dementia/*metabolism ; Electron Probe Microanalysis ; Hippocampus/*metabolism ; Humans ; Magnesium/metabolism ; Microscopy, Electron, Scanning ; Neurofibrils/ultrastructure ; Silicon/metabolism
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  • 156
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    Long-term antidepressant treatment decreases spiroperidol-labeled serotonin receptor binding (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-10-03
    Description: Antidepressants compete at several neurotransmitter receptor binding site, but drug affinities do not correlate with clinical efficacy. Long-term, but not short-term, antidepressant treatment decreases the numbers of both serotonin and beta-adrenergic receptors. The decrease in the number of receptor sites is most marked for [3H]spiroperidol-labeled serotonin receptors and is characteristic for antidepressants of several classes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Peroutka, S J -- Snyder, S H -- 5T32GM0309/GM/NIGMS NIH HHS/ -- DA00266/DA/NIDA NIH HHS/ -- MH18501/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1980 Oct 3;210(4465):88-90.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6251550" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antidepressive Agents/administration & dosage/metabolism/*pharmacology ; Frontal Lobe/drug effects ; Male ; Rats ; Receptors, Adrenergic, alpha/metabolism ; Receptors, Adrenergic, beta/drug effects/metabolism ; Receptors, Dopamine/metabolism ; Receptors, Histamine H1/metabolism ; Receptors, Muscarinic/metabolism ; Receptors, Serotonin/*drug effects/metabolism ; Spiperone/metabolism ; Time Factors
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  • 157
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    Sperm-egg interaction: evidence for boar sperm plasma membrane receptors for porcine zona pellucida (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-01-04
    Description: Freshly ejaculated, noncapacitated boar sperm bind rapidly and in large numbers to pig egg zona pellucida in vitro. In the present study, the number of sperm bound decreased sharply when sperm motility was lowered by energy poisons or by reducing the temperature. Highly motile sperm from humans, guinea pigs, and rats, added at concentrations ten times higher than control sperm, did not bind to the porcine zona. At the same high concentration, a small number of hamster and bull sperm bound to the zona. Binding of boar sperm to the zona pellucida was blocked almost completely by diluted whole antiserum to sperm plasma membranes and by univalent (Fab) antibody to these membranes. When antibody to sperm plasma membrane was first absorbed with plasma membrane vesicles, sperm binding was not inhibited. These results provide direct evidence for the existence of sperm plasma membrane receptors for the zona pellucida of the pig.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Peterson, R N -- Russell, L -- Bundman, D -- Freund, M -- New York, N.Y. -- Science. 1980 Jan 4;207(4426):73-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7188647" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cattle ; Cell Membrane/metabolism ; Female ; *Fertilization ; Guinea Pigs ; Humans ; Immunoglobulin Fab Fragments ; Male ; Ovum/*metabolism ; Rats ; Receptors, Drug/metabolism ; Species Specificity ; *Sperm-Ovum Interactions ; Spermatozoa/*metabolism ; Swine ; Zona Pellucida/*metabolism
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  • 158
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    Calcification inside artificial hearts: inhibition by warfarin-sodium (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-05-09
    Description: Intracavitary calcium phosphate deposits were observed in smooth, elastomeric blood pump sacs implanted in male calves for periods of 115 to 166 days. These deposits occurred predominantly on the flexing surface of the sacs. In contrast, similar pump sacs remained generally free of mineral deposits for up to 150 days in calves treated with the anticoagulant warfarin-sodium. These results implicate a vitamin K-dependent process in calcium phosphate deposition on elastomeric sacs.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pierce, W S -- Donachy, J H -- Rosenberg, G -- Baier, R E -- New York, N.Y. -- Science. 1980 May 9;208(4444):601-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7367883" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Calcinosis/*prevention & control ; Calcium Phosphates/metabolism ; Cattle ; *Heart, Artificial ; Polyurethanes ; Warfarin/*therapeutic use
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  • 159
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    Intracellularly injected cobaltous ions accumulate at synaptic densities (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-03-28
    Description: Physiologically identified neurons in the locust were iontophoretically injected with a mixture of cobaltous and potassium ions. After being fixed for electron microscopy, 2.5-micrometer sections of the epoxy-embedded ganglia were intensified with silver. The intensified material was resectioned and examined in the electron microscope. The cobalt-silver precipitate appeared as discrete densities. Localized accumulations of the precipitate were seen within the injected cell along the neuronal membranes and especially at synapses. Location and recognition of the stained neuron in the electron microscope was facilitated by the tendency of the cobaltous ions to aggregate at the synaptic sites.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Phillips, C E -- New York, N.Y. -- Science. 1980 Mar 28;207(4438):1477-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6987734" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cobalt/*metabolism ; Ganglia/ultrastructure ; Grasshoppers ; Histological Techniques ; Iontophoresis ; Microscopy, Electron/methods ; Silver/*metabolism ; Synapses/*metabolism/ultrastructure ; Synaptic Membranes/ultrastructure
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  • 160
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    Neurotransmitter receptor binding in bovine cerebral microvessels (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-05-09
    Description: Purified preparations of microvessels from bovine cerebral cortex contain substantial levels of alpha-adrenergic, beta-adrenergic, and histamine 1 receptor binding sites but only negligible serotonin, muscarinic cholinergic, opiate, and benzodiazepine receptor binding. Norepinephrine and histamine may be endogenous regulators of the cerebral microcirculation at the observed receptors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Peroutka, S J -- Moskowitz, M A -- Reinhard, J F Jr -- Snyder, S H -- New York, N.Y. -- Science. 1980 May 9;208(4444):610-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6102801" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/*blood supply ; Cattle ; Ligands ; Microcirculation ; Neurotransmitter Agents/*metabolism ; Receptors, Adrenergic/*metabolism ; Receptors, Adrenergic, alpha/metabolism ; Receptors, Adrenergic, beta/metabolism ; Receptors, Cholinergic/metabolism ; Receptors, Histamine/*metabolism ; Receptors, Histamine H1/*metabolism ; Receptors, Serotonin/metabolism
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  • 161
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    Hormone binding alters the conformation of the insulin receptor (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-12-05
    Description: Fat cells or fat cell membranes were briefly subjected to mild proteolysis under conditions where insulin receptors were either free or bound to (125)I-labeled insulin. When receptors were then affinity-labeled to visualize the effects of this treatment, it was observed that receptors that had been occupied by ligand during proteolysis exhibited greater rates of degradation than unoccupied receptors. These results demonstrate that insulin-receptor interaction induces a change in receptor structure that may be related to signal transmission.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pilch, P F -- Czech, M P -- AM 06069/AM/NIADDK NIH HHS/ -- AM 17893/AM/NIADDK NIH HHS/ -- HD 11343/HD/NICHD NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1980 Dec 5;210(4474):1152-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7003712" target="_blank"〉PubMed〈/a〉
    Keywords: Adipose Tissue/metabolism ; Animals ; Cell Membrane/metabolism ; Insulin/*metabolism ; Male ; Peptide Fragments/analysis ; Protein Binding ; Protein Conformation ; Rats ; Receptor, Insulin/*metabolism ; Trypsin/metabolism
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  • 162
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    Nerve terminals are as metabolically different as the muscle fibers they innervate (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-11-21
    Description: The rate at which glucose enters nerve terminals in muscle was estimated indirectly by measuring changes in miniature end-plate potential frequency D-Glucose entered nerve terminals in muscles with a fast twitch more rapidly than it entered those with a slow twitch. This suggests that nerve terminals in fast- and slow-twitch muscles differ in their rate of metabolism.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pickett, J B -- New York, N.Y. -- Science. 1980 Nov 21;210(4472):927-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7434009" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Transport ; Diaphragm/innervation ; Glucose/*metabolism ; Kinetics ; Membrane Potentials ; Nerve Endings/*metabolism ; Neuromuscular Junction/*metabolism ; Osmolar Concentration ; Rats
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  • 163
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    Blood lead concentrations in a remote Himalayan population (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-12-05
    Description: The lead content in the air at the foothills of the Himalayas in Nepal was found to be negligible. The concentration of lead in the blood of 103 children and adults living in this region was found to average 3.4 micrograms per deciliter, a level substantially lower than that found in industrialized populations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Piomelli, S -- Corash, L -- Corash, M B -- Seaman, C -- Mushak, P -- Glover, B -- Padgett, R -- ES-01104/ES/NIEHS NIH HHS/ -- ES-26437/ES/NIEHS NIH HHS/ -- New York, N.Y. -- Science. 1980 Dec 5;210(4474):1135-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7444442" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Air Pollutants/*analysis ; Child, Preschool ; China ; Environment ; Female ; Humans ; *Industry ; Lead/*blood ; Male ; Nepal
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  • 164
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    Cadmium concentrations in blood (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-05-02
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pleban, P -- New York, N.Y. -- Science. 1980 May 2;208(4443):520.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7367877" target="_blank"〉PubMed〈/a〉
    Keywords: Cadmium/*blood/urine ; Erythrocytes/analysis ; Humans ; Plasma/analysis ; Smoking/*physiopathology ; Specimen Handling
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  • 165
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    Ultrasonic diagnostic instruments (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-10-17
    Description: The underlying physical principles and current limitations of diagnostic ultrasonic instruments are reviewed. Recently developed ultrasonic imaging devices using pulsed-reflected ultrasound are discussed in detail. These instruments transmit short trains of 1.5- to 10-megahertz sound. Echoes reflected from tissue are converted to electrical signals, which are presented on a display device to outline the contour of tissues and organs within the body. The physical resolution of the system is dependent on several design factors in addition to the transmitted sound frequencies. A resolution volume of approximately 1.5 by 3 by 4 millimeters is achieved optimally with commercially available systems operating at 2.25 megahertz. The various instrument designs are described in the context of clinical usage. Because the sound is diffracted, refracted, and reflected, tghe imaging considerations are different from those of x-ray imaging. Diagnostic devices based on the Doppler principle are distinguished from pulsed-reflected ultrasonic instruments.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Popp, R L -- Macovski, A -- GM-17940/GM/NIGMS NIH HHS/ -- HL-21278/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1980 Oct 17;210(4467):268-73.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7423186" target="_blank"〉PubMed〈/a〉
    Keywords: Auscultation/instrumentation ; Blood Flow Velocity ; Echocardiography/methods ; Heart Valve Diseases/diagnosis ; Humans ; Rheology ; Ultrasonics/*instrumentation ; Ultrasonography
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  • 166
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    Estrogen and the growth of breast cancer: new evidence suggests indirect action (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-08-08
    Description: The growth of the MCF-7 human breast cancer cell line is unresponsive to the presence of estrogen in culture media. Paradoxically, in nude mice, growth of these cells and formation of solid tumors are dependent on estrogen. Tumors fail to develop in ovariectomized mice, but do develop in intact mice and in ovariectomized mice given estrogen. Primary cultures derived from MCF-7 tumors revert to unresponsiveness to estrogen. However, when these cultures are again transplanted into nude mice, estrogen is required for tumor formation. The continuous culture, the solid tumor, and the primary cultures therefrom have similar estrogen-binding capacities and affinities. These results indicate that mammary carcinoma cell growth in vivo is subject to inhibition that can be overcome by estrogen.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shafie, S M -- New York, N.Y. -- Science. 1980 Aug 8;209(4457):701-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6994231" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Breast Neoplasms/metabolism/*physiopathology ; Castration ; Cell Division/drug effects ; Cell Line ; Cytosol/metabolism ; Estradiol/metabolism/*pharmacology ; Female ; Humans ; Insulin/pharmacology ; Mice ; Mice, Nude ; Neoplasm Transplantation ; Receptors, Estrogen/metabolism ; Transplantation, Heterologous
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  • 167
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    Cytochrome p-450: localization in rabbit lung (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-03-28
    Description: Cytochrome P-450-dependent monooxygenase systems, which metabolize endogenous as well as foriegn compounds, are found in hepatic and several extrahepatic tissues of mammals, including humans. A form of cytochrome P-450 is localized in the nonciliated bronchiolar epithelial cells (Clara cells) of the small airways of rabbit lung. The apparent high concentration of the cytochrome in this pulmonary cell type compared to liver may be an important determinant in the susceptibility of the lung to a number of toxic chemicals that undergo metabolic activation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Serabjit-Singh, C J -- Wolf, C R -- Philpot, R M -- Plopper, C G -- New York, N.Y. -- Science. 1980 Mar 28;207(4438):1469-70.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6767272" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biotransformation ; Bronchi/enzymology ; Cytochrome P-450 Enzyme System/immunology/*metabolism ; Epithelium/enzymology ; Fluorescent Antibody Technique ; Inactivation, Metabolic ; Lung/cytology/*enzymology/metabolism ; Rabbits
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  • 168
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    Correction of enzyme deficiency in mice by allogeneic bone marrow transplantation with total lymphoid irradiation (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-12-05
    Description: Enzyme deficiency was corrected in mice after allogeneic bone marrow transplantation with occurrence of graft versus host disease. beta-Glucuronidase-deficient C3H/HeJ mice were treated with total lymphoid irradiation. Normal bone marrow cells (30 X 10(6)) from BALB/c to C3H/HeJ chimeras (〉90 percent circulating donor-type cells) without graft versus host disease. beta-Glucuronidase activity increases to normal levels in all chimeras as measured in the liver and in the plasma. Activity was maintained throughout an observation period of 7 months.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Slavin, S -- Yatziv, S -- A1 15387/PHS HHS/ -- New York, N.Y. -- Science. 1980 Dec 5;210(4474):1150-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7003711" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Bone Marrow Transplantation ; Glucuronidase/blood/*deficiency ; Liver/enzymology ; Mice ; Mice, Inbred BALB C ; Mice, Inbred C3H ; Radiation Chimera ; Transplantation, Homologous
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  • 169
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    Cells isolated from the embryonic neural retina differ in behavior in vitro and membrane structure (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-08-29
    Description: Several subpopulations of cells were isolated from trypsin-dissociated embryonic (14 days) chick retinas. The cells of each subpopulation differed in associative behavior measured by cell aggregation and stationary culture assays and in glycoproteins that contain glucosamine. Freeze-fracture analysis showed that these populations also differed in intramembrane particle content.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sheffield, J B -- Pressman, D -- Lynch, M -- New York, N.Y. -- Science. 1980 Aug 29;209(4460):1043-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7403867" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Adhesion ; Cell Fractionation/methods ; Cell Membrane/ultrastructure ; Cells, Cultured ; Chick Embryo ; Membrane Proteins/metabolism ; Retina/cytology/*embryology
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  • 170
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    EPA announces toxic waste controls (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-05-09
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smith, R J -- New York, N.Y. -- Science. 1980 May 9;208(4444):581.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7367880" target="_blank"〉PubMed〈/a〉
    Keywords: Chemical Industry/*standards ; *Environmental Exposure ; Government Agencies ; Humans ; United States ; *Waste Products
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  • 171
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    Entry of opioid peptides into the central nervous system (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-01-04
    Description: Cerebrovascular permeability of four modified opioid peptides--[D-Ala2]methionine enkephalin amide, beta-[D-Ala62,14C-Homoarg69]lipotropin 61 -69, alpha-[D-Ala2,14C-Homoarg9]endorphin, and beta-[D-Ala2,14C-Homoarg]endorphin--ranged from 1.4 to 3.9 X 10(-6) centimeters per second in brain regions of the conscous rat. These significant permeabilities should allow the peptides to fill the extracellular brain space with a half time of 3 to 11 minutes, as a result of a step increase in plasma concentration of unbound peptide.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rapoport, S I -- Klee, W A -- Pettigrew, K D -- Ohno, K -- New York, N.Y. -- Science. 1980 Jan 4;207(4426):84-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7350645" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Blood-Brain Barrier ; Brain/*metabolism ; Capillary Permeability ; Endorphins/*metabolism ; Enkephalins/metabolism ; Extracellular Space/metabolism ; Male ; Rats ; Solubility ; beta-Lipotropin/*metabolism
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  • 172
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    Food dyes impair performance of hyperactive children on a laboratory learning test (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-03-28
    Description: Forty children were given a diet free of artificial food dyes and other additives for 5 days. Twenty of the children had been classified as hyperactive by scores on the Conners Rating Scale and were reported to have favorable responses to stimulant medication. A diagnosis of hyperactivity had been rejected in the other 20 children. Oral challenges with large doses (100 or 150 milligrams) of a blend of FD & C approved food dyes or placebo were administered on days 4 and 5 of the experiment. The performance of the hyperactive children on paired-associate learning tests on the day they received the dye blend was impaired relative to their performance after they received the placebo, but the performance of the nonhyperactive group was not affected by the challenge with the food dye blend.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Swanson, J M -- Kinsbourne, M -- New York, N.Y. -- Science. 1980 Mar 28;207(4438):1485-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7361102" target="_blank"〉PubMed〈/a〉
    Keywords: Child ; Dose-Response Relationship, Drug ; Female ; Food Coloring Agents/*pharmacology ; Humans ; Hyperkinesis/*physiopathology ; Learning/*drug effects ; Male ; Time Factors
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  • 173
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    Bandwidth requirements for video transmission of american sign language and finger spelling (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-11-14
    Description: Although current video communication schemes use a bandwidth on the order of 1 megahertz, the bandwidth required for video communication of American Sign Language by a simple raster scan is only approximately 20 kilohertz.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sperling, G -- New York, N.Y. -- Science. 1980 Nov 14;210(4471):797-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7433998" target="_blank"〉PubMed〈/a〉
    Keywords: Humans ; *Manual Communication ; Sign Language ; Telecommunications/*instrumentation
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  • 174
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    Rapid effect of triiodothyronine on the mitochondrial pathway in rat liver in vivo (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-10-17
    Description: Intravenous infections of minute doses of triiodothyronine were administered to thyroidectomized rats 30 minutes before they were killed. Hepatic mitochondria were isolated rapidly and formation of adenosine triphosphate and consumption of oxygen were assessed by a 2-minute incubation. Hormone injection enhanced formation of adenosine triphosphate 114 to 217 percent over control values, with a proportionate increase in consumption of oxygen. The ratio of phosphate to oxygen was about 2.0, signifying tightly coupled oxidative phosphorylation. Stimulation was not abolished by injection of cycloheximide, puromycin, actinomycin D, or chloramphenicol 1 hour before the rats were killed. This signifies direct mitochondrial stimulation by triiodothyronine in the absence of protein synthesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sterling, K -- Brenner, M A -- Sakurada, T -- AM 10739/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1980 Oct 17;210(4467):340-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7423197" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphate/biosynthesis ; Animals ; Mitochondria, Liver/*drug effects ; Oxygen Consumption ; Protein Biosynthesis ; Rats ; Thyroidectomy ; Triiodothyronine/*pharmacology
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  • 175
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    Pineal melatonin rhythm: reduction in aging Syrian hamsters (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-12-19
    Description: The melatonin content measured by radioimmunoassay of the pineal gland over a 24-hour period (a light:dark cycle of 14 hours of light and 10 of darkness) was compared in young and old female and male Syrian hamsters. The young animals of both sexes exhibited roughly an eightfold rise in pineal melatonin during the dark phase of the cycle, whereas in the old hamsters the nocturnal rise in melatonin was almost completely absent. The results indicate a marked drop in pineal biosynthetic activity in the aging hamster.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Reiter, R J -- Richardson, B A -- Johnson, L Y -- Ferguson, B N -- Dinh, D T -- New York, N.Y. -- Science. 1980 Dec 19;210(4476):1372-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7434032" target="_blank"〉PubMed〈/a〉
    Keywords: *Aging ; Animals ; Circadian Rhythm ; Cricetinae ; Melatonin/*metabolism ; Mesocricetus ; Pineal Gland/*physiology ; Sex Factors
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    Government weakens airport noise standards (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-03-14
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smith, R J -- New York, N.Y. -- Science. 1980 Mar 14;207(4436):1189-90.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7355281" target="_blank"〉PubMed〈/a〉
    Keywords: *Aircraft ; Government Agencies ; Humans ; Legislation as Topic ; *Noise/economics ; *Noise, Transportation/economics ; United States
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  • 177
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    A light rein falls on OSHA (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-08-01
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smith, R J -- New York, N.Y. -- Science. 1980 Aug 1;209(4456):567-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7394522" target="_blank"〉PubMed〈/a〉
    Keywords: Benzene ; *Carcinogens ; *Government Agencies ; Humans ; Legislation as Topic ; *Occupational Medicine ; Safety ; United States
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  • 178
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    Spatial adaptation of short-wavelength pathways in humans (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-02-01
    Description: Color-selective spatial adaptation of the short-wavelength, or blue-sensitive, pathway was demonstrated. The adaptation was orientation selective and strongly monocular. Adaptation was assessed by measuring visibility thresholds for monochromatic gratings in subjects adapted to high-contrast violet gratings designed to stimulate only blue-sensitive cones. The results showed spatially selective, adaptable channels within the short-wavelength pathway.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stromeyer, C F 3rd -- Kronauer, R E -- Madsen, J C -- Cohen, M A -- New York, N.Y. -- Science. 1980 Feb 1;207(4430):555-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7352270" target="_blank"〉PubMed〈/a〉
    Keywords: *Adaptation, Physiological ; Color Perception/*physiology ; Form Perception/physiology ; Humans ; Photoreceptor Cells/*physiology ; Visual Perception/physiology
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  • 179
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    Visual aftereffects derived from inspection of orthogonally moving patterns (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-04-25
    Description: Alternate inspection of patterns moving in orthogonal directions induces an aftereffect in which a stationary test pattern seems to move in a new direction. This direction is the resultant of the two directions of aftereffect that would have arisen from separately inspecting each of the moving patterns. The direction in which objects appear to move, like their color and depth, can thus depend on a synthesis of unperceived components.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Riggs, L A -- Day, R H -- New York, N.Y. -- Science. 1980 Apr 25;208(4442):416-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7367869" target="_blank"〉PubMed〈/a〉
    Keywords: Afterimage/*physiology ; Color Perception/physiology ; Form Perception/*physiology ; Functional Laterality ; Humans ; Motion Perception/*physiology
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  • 180
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    Making interferon: gains come slowly (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-11-07
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sun, M -- New York, N.Y. -- Science. 1980 Nov 7;210(4470):618.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6159683" target="_blank"〉PubMed〈/a〉
    Keywords: Cells, Cultured ; Drug Industry ; Fibroblasts/metabolism ; Humans ; Interferons/*biosynthesis ; Male ; National Institutes of Health (U.S.) ; Research Support as Topic ; United States
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  • 181
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    Regional assignment of genes for human esterase D and retinoblastoma to chromosome band 13q14 (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-05-30
    Description: The expression of human esterase D was evaluated quantitatively and qualitatively in five persons with partial deletions or duplications of chromosome 13. The results showed that the locus of this enzyme is at band 13q14. Deletion of this same band in other subjects has been found previously to indicate a predisposition to the development of retinoblastoma, which was present in the four individuals in this study who had partial deletions of chromosome 13. Because of this close synteny, esterase D evaluation should aid in the diagnosis and genetic counseling of retinoblastoma.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sparkes, R S -- Sparkes, M C -- Wilson, M G -- Towner, J W -- Benedict, W -- Murphree, A L -- Yunis, J J -- New York, N.Y. -- Science. 1980 May 30;208(4447):1042-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7375916" target="_blank"〉PubMed〈/a〉
    Keywords: Chromosome Deletion ; Chromosome Mapping ; *Chromosomes, Human, 13-15 ; Esterases/*genetics ; Female ; Genes ; Humans ; Intellectual Disability/enzymology/genetics ; Male ; Retinoblastoma/enzymology/*genetics
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  • 182
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    Neurobiology of amnesia (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-08-15
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Squire, L R -- Davis, H P -- Spanis, C W -- New York, N.Y. -- Science. 1980 Aug 15;209(4458):836-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7190729" target="_blank"〉PubMed〈/a〉
    Keywords: Amnesia/*physiopathology ; Amnesia, Retrograde/*physiopathology ; Animals ; Brain Chemistry ; Catecholamines/metabolism ; Cycloheximide/pharmacology ; Humans ; Memory/drug effects ; Mice ; Nerve Tissue Proteins/biosynthesis ; Phenoxybenzamine/pharmacology
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  • 183
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    Asymmetry in facial expression (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-08-15
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Spinrad, S I -- New York, N.Y. -- Science. 1980 Aug 15;209(4458):834.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7403853" target="_blank"〉PubMed〈/a〉
    Keywords: *Facial Expression ; *Functional Laterality ; Humans ; Photography
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  • 184
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    An explanation of the language of a chimpanzee (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-04-18
    Description: The language barrier of the chimpanzee Lana, previously described by Rumbaugh (1977), can be simulated by a computer model in which the animal selects, depending upon context, one of six stock sentences with fixed and variable elements.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Thompson, C R -- Church, R M -- New York, N.Y. -- Science. 1980 Apr 18;208(4441):313-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7367862" target="_blank"〉PubMed〈/a〉
    Keywords: *Animal Communication ; Animals ; Behavior, Animal/*physiology ; *Language ; Learning/physiology ; Pan troglodytes/*physiology
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  • 185
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    Unequal alternating monocular deprivation causes asymmetric visual fields in cats (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-04-25
    Description: Kittens were reared so that each eye received normal patterned vision on alternate days. If the eyes received equal periods of stimulation, the visual fields were normal. If one eye received much more experience than the other, the field of the less experienced eye was restricted to the temporal hemifield. This change, which differs from that observed when one or both eyes are deprived continuously of patterned input, suggests that an imbalance in the duration of stimulation can influence the outcome of the normal competitive interaction between pathways from the two eyes and can cause a selective suppression of a portion of the input from the less experienced eye. This suppression may involve the ipsilateral retino-geniculo-cortical pathways or it may involve the entire cortical pathway from the less experienced eye, leaving the colliculus to control responses to visual targets.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tumosa, N -- Tieman, S B -- Hirsch, H V -- New York, N.Y. -- Science. 1980 Apr 25;208(4442):421-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7367872" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cats ; Functional Laterality ; Orientation/physiology ; Superior Colliculi/physiology ; Visual Cortex/physiology ; *Visual Fields ; Visual Pathways/*growth & development ; Visual Perception/*physiology
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  • 186
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    Carbon dioxide sensitivity of mosquitoes infected with California encephalitis virus (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-08-29
    Description: Four species of mosquitoes became sensitive to carbon dioxide approximately 3 to 4 days after they received intrathoracic injectins of California encephalitis virus. Aedes melanimon and Aedes dorsalis infected orally with California encephalitis virus also became carbon dioxide-sensitive, but mosquitoes infected transovarially did not. Sensitivity to carbon dioxide was inhibited by antiserum to California encephalitis virus. To our knowledge this is the first report of carbon dioxide sensitivity induced in arthropods by a bunyavirus and the first demonstration of this phenomenon by an arbovirus in its proven vector.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Turell, M J -- Hardy, J L -- New York, N.Y. -- Science. 1980 Aug 29;209(4460):1029-30.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6773145" target="_blank"〉PubMed〈/a〉
    Keywords: Aedes/*microbiology ; Animals ; Carbon Dioxide/*toxicity ; Encephalitis Virus, California ; Encephalitis, Arbovirus/*veterinary ; Encephalitis, California/*veterinary
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  • 187
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    Synthesis of the contingent negative variation brain potential from noncontingent stimulus and motor elements (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-06-06
    Description: Slow shifts in brain potential (commonly called the contingent negative variation), obtained during a warned reaction-time task with a foreperiod of 1 second, were compared with waveforms synthesized by the addition of separately obtained potentials associated with individual (nonpaired) sensory stimuli and self-initiated motor movements. The synthesized waveforms match closely the actual contingent negative variation, suggesting that it is constituted largely of separate, noncontingent elements related to sensory and motor processes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rohrbaugh, J W -- Syndulko, K -- Sanquist, T F -- Lindsley, D B -- New York, N.Y. -- Science. 1980 Jun 6;208(4448):1165-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7375925" target="_blank"〉PubMed〈/a〉
    Keywords: Auditory Perception/physiology ; Brain/*physiology ; *Contingent Negative Variation ; *Electrophysiology ; Humans ; Movement ; Visual Perception/physiology
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  • 188
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    Stereospecific nicotine receptors on rat brain membranes (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-11-07
    Description: A stereospecific binding site for nicotine has been detected on rat brain membranes. Competition studies with cholinergic agonists suggest that this site is a nicotinic cholinergic receptor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Romano, C -- Goldstein, A -- DA-1938/DA/NIDA NIH HHS/ -- DA-7063/DA/NIDA NIH HHS/ -- New York, N.Y. -- Science. 1980 Nov 7;210(4470):647-50.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7433991" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Binding, Competitive ; Brain/*metabolism ; Ligands ; Male ; Nicotine/metabolism ; Rats ; Receptors, Cholinergic/*metabolism ; Receptors, Nicotinic/*metabolism ; Stereoisomerism ; Structure-Activity Relationship ; Synaptic Membranes/metabolism
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  • 189
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    Assessing diagnostic technologies (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-03-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Weber, P M -- New York, N.Y. -- Science. 1980 Mar 28;207(4438):1414-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7361092" target="_blank"〉PubMed〈/a〉
    Keywords: Brain Diseases/*diagnosis ; Humans ; Radionuclide Imaging/*methods ; Technology Assessment, Biomedical/*methods ; Tomography, X-Ray Computed/*methods
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 190
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    Methylphenidate and hyperactivity: effects on teacher behaviors (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-06-13
    Description: Teacher interactions with hyperactive and comparison boys were observed during classroom activities. A double-blind, methylphenidate-placebo cross-over design was used within the hyperactive group. With no knowledge of any child's diagnosis or drug status, the teacher was more intense and controlling toward hyperactive boys taking placebo than toward either medicated hyperactive boys or comparison boys; her behavior did not differ toward the latter two groups. Discussion focused on the need to consider the broad social ramifications of pharmacologic treatment programs.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Whalen, C K -- Henker, B -- Dotemoto, S -- New York, N.Y. -- Science. 1980 Jun 13;208(4449):1280-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7375940" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Behavior/drug effects ; Child ; Humans ; Hyperkinesis/*drug therapy ; *Interpersonal Relations ; Male ; Methylphenidate/pharmacology/*therapeutic use ; *Teaching
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  • 191
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    Calcium transients during excitation-contraction coupling in mammalian heart: aequorin signals of canine Purkinje fibers (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-03-07
    Description: Aequorin signals in mammalian heart muscle cells reveal the existence of two temporally distinct processes that increase cytoplasmic calcium ions after membrane excitation. The differential dependence of these processes on the pattern of stimulation suggests that the first process is, or is closely related to, calcium entry through the surface membrane and that the second is calcium release from intracellular storage sites.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wier, W G -- New York, N.Y. -- Science. 1980 Mar 7;207(4435):1085-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7355274" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Aequorin/metabolism ; Animals ; Calcium/*metabolism ; Cell Compartmentation ; Dogs ; Heart Conduction System/*metabolism ; In Vitro Techniques ; Ion Channels/metabolism ; Membrane Potentials ; *Myocardial Contraction ; Purkinje Fibers/*metabolism ; Time Factors
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  • 192
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    Pituitary gonadotropin-releasing hormone receptors during the rat estrous cycle (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-08-22
    Description: The binding of [6-alanine]gonadotropin-releasing hormone to pituitary plasma membranes increased threefold between metestrus and early proestrus in female rats. Receptor numbers fell rapidly on the afternoon of proestrus coincident with the preovulatory gonadotropin surge. The numbers of receptors for gonadotropin-releasing hormone were positively correlated with concentrations of estradiol in serum; this pattern may be a necessary component of increased pituitary sensitivty to gonadotropin-releasing hormone observed during proestrus.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Savoy-Moore, R T -- Schwartz, N B -- Duncan, J A -- Marshall, J C -- New York, N.Y. -- Science. 1980 Aug 22;209(4459):942-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6250218" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Membrane/metabolism ; Estradiol/blood ; *Estrus ; Feedback ; Female ; Follicle Stimulating Hormone/blood ; Gonadotropin-Releasing Hormone/analogs & derivatives/*metabolism ; Kinetics ; Luteinizing Hormone/blood ; Pituitary Gland, Anterior/*metabolism ; Pregnancy ; Progesterone/blood ; Rats ; Receptors, Cell Surface/*metabolism
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  • 193
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    Glutamine synthetase: assimilatory role in liver as related to urea retention in marine chondrichthyes (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-04-18
    Description: The levels of gluatmine synthetase specific activity in hepatic and renal tissue are higher in fish that are ureosmoregulators than in those that are not. Enzyme activities in the liver and kidney of 18 species of fish correlated directly with the ureosmoregulatory adaptation of each species.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Webb, J T -- Brown, G W Jr -- New York, N.Y. -- Science. 1980 Apr 18;208(4441):293-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6102799" target="_blank"〉PubMed〈/a〉
    Keywords: Ammonia/metabolism ; Animals ; Brain/enzymology ; Fishes/*metabolism ; Glutamate-Ammonia Ligase/*metabolism ; Kidney/enzymology ; Liver/enzymology ; Species Specificity ; Urea/*metabolism ; Water-Electrolyte Balance
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  • 194
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    Reference: the linguistic essential (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-11-21
    Description: Three chimpanzees learned to label three edibles as "foods" and three inedibles as "tools". Two chimpanzees could then similarly categorize numerous objects during blind trial 1 tests when shown only objects' names. The language-like skills of the chimpanzee who failed (Lana) illustrates that apes can use symbols in ways that emulate human usage without comprehending their representational function.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Savage-Rumbaugh, E S -- Rumbaugh, D M -- Smith, S T -- Lawson, J -- HD-06016/HD/NICHD NIH HHS/ -- RR-00165/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1980 Nov 21;210(4472):922-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7434008" target="_blank"〉PubMed〈/a〉
    Keywords: *Animal Communication ; Animals ; Association ; Learning ; *Linguistics ; Pan troglodytes/*physiology
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  • 195
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    Food, the hidden crisis (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-06-27
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wharton, C R Jr -- New York, N.Y. -- Science. 1980 Jun 27;208(4451):1415.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7384783" target="_blank"〉PubMed〈/a〉
    Keywords: Agriculture ; *Food Supply ; Humans ; *Starvation ; United Nations ; United States
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  • 196
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    Magnetic field of a nerve impulse: first measurements (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-04-04
    Description: The magnetic field of the action potential from an isolated frog sciatic nerve was measured by a SQUID magnetometer with a novel room-temperature pickup coil. The 1.2 x 10(-10) tesla field was measured 1.3 millimeters from the nerve with a signal-to-noise ratio of 40 to 1.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wikswo, J P -- Barach, J P -- Freeman, J A -- New York, N.Y. -- Science. 1980 Apr 4;208(4439):53-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7361105" target="_blank"〉PubMed〈/a〉
    Keywords: *Action Potentials ; Animals ; Anura ; *Magnetics ; *Neural Conduction ; Sciatic Nerve/physiology
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  • 197
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    Aspirin: an unexpected side effect on prostacyclin synthesis in cultured vascular smooth muscle cells (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-11-07
    Description: Monolayer cultures of rat aorta smooth muscle cells synthesized the anti-aggregatory substance prostacyclin via the cyclooxygenase pathway from 14C-labeled arachidonic acid. The product was identified both by bioassay and by mass spectrometry. Labeled cells produced prostacyclin only when exposed to the initiator thrombin: treatment with therapeutic concentrations of aspirin (0.2 millimolar) for 30 minutes completely destroyed the cells' ability to synthesize prostacyclin. Prostacyclin synthesis from exogenous arachidonic acid recovered fully within 1 to 2 hours by a cycloheximide-sensitive process. Thrombin responsivness, which was permanently impaired in confluent nondividing cultures, recovered substantially and within 24 hours only when cells were stimulated to divide by subculturing. These results indicate that resting vascular cells can rapidly synthesize new cyclooxygenase, but that aspirin destroys additional components of the prostacyclin system which can only be replaced during cell division.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Whiting, J -- Salata, K -- Bailey, J M -- New York, N.Y. -- Science. 1980 Nov 7;210(4470):663-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6776627" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Aorta/*drug effects ; Arachidonic Acids/metabolism ; Aspirin/*pharmacology ; Cells, Cultured ; Cyclooxygenase Inhibitors ; Epoprostenol/*biosynthesis ; Muscle, Smooth/drug effects ; Prostaglandins/*biosynthesis ; Rats ; Thrombin/pharmacology
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  • 198
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    Glucan-induced modification of murine viral hepatitis (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-04-04
    Description: Glucan, a macrophage stimulant, was evaluated for its ability to alter survival and phagocytic dysfunction in mice challenged with mouse hepatitis virus strain MHV-A59. Administration of glucan before the mice were challenged with the virus significantly prolonged median survival time but did not modify overall mortality compared with control mice given dextrose. Maximal effectiveness was achieved when glucan was administered both before and after the viral challenge. In contrast to the marked hepatic parenchymal cell necrosis observed in the control mice, glucan-treated mice exhibited reduced pathology. Intraperitoneal administration of MHV-A59 resulted in a significant depression of phagocytic activity compared with controls that were not exposed to the virus. The enhancement in phagocytic function in glucan-treated control mice was unaltered in virus-challenged, glucan-treated mice. Thus glucan is capable of increasing survival, inhibiting hepatic necrosis, and maintaining an activated state of phagocytic activity in mice challenged with MHV-A59. Macrophage stimulants may have a significant role in the modification of virally induced hepatic lesions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Williams, D L -- Di Luzio, N R -- New York, N.Y. -- Science. 1980 Apr 4;208(4439):67-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7361108" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Glucans/*pharmacology/therapeutic use ; Hepatitis, Viral, Animal/drug therapy/*immunology/mortality ; Liver/pathology ; Macrophages/drug effects ; Male ; Mice ; Mice, Inbred C57BL ; Phagocytosis/*drug effects
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  • 199
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    Genotoxicity of the antihypertensive drugs hydralazine and dihydralazine (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-10-17
    Description: The genotoxicity of the antihypertensive agents hydralazine and dihydralazine was tested in mammalian cells and bacteria. Both drugs elicited DNA repair in rat hepatocyte primary cultures. In the Ames test, both with and without an S-9 fraction, hydralazine was mutagenic in strains TA100 and TA1537, whereas dihydralazine was weakly mutagenic in strain TA1537. These findings support the observation that hydralazine is carcinogenic in mice. The carcinogenicity of many chemicals results from interaction with DNA. Since these studies demonstrate that hydralazine and dihydralazine damage DNA in mammalian cells, these drugs should be viewed as potential human carcinogens.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Williams, G M -- Mazue, G -- McQueen, C A -- Shimada, T -- N 01-CP-55705/CP/NCI NIH HHS/ -- New York, N.Y. -- Science. 1980 Oct 17;210(4467):329-30.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7423193" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylation ; Animals ; Biotransformation ; *Carcinogens ; Cells, Cultured ; DNA Repair/*drug effects ; Dihydralazine/*toxicity ; Dose-Response Relationship, Drug ; Drug Evaluation, Preclinical ; Hydralazine/*analogs & derivatives/*toxicity ; Liver/metabolism ; *Mutagens ; Rats ; Salmonella typhi/drug effects
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  • 200
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    Multiple daily amphetamine administration: behavioral and neurochemical alterations (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-02-15
    Description: In rats, multiple daily amphetamine injections (2.5 milligrams per kilogram of body weight, injected subcutaneously every 4 hours for 5 days) resulted in a progressive augmentation in response, characterized by a more rapid onset and an increased magnitude of stereotypy. By contrast, offset times of both the stereotypy and the poststereotypy hyperactivity periods were markedly shortened. When the animals were retested with the same dose of amphetamine 8 days after the long-term treatment was discontinued, the time of offset of the stereotypy and hyperactivity phases had recovered to values found with short-term amphetamine treatment, whereas the more rapid onset of stereotypy persisted. Brain monoamine and amphetamine concentrations and tyrosine hydroxylase activity were determined in comparably treated rats at times corresponding to the behavioral observations. The behavioral data indicate that enhanced responsiveness to amphetamine following its repeated administration may contribute to the development of amphetamine psychosis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Segal, D S -- Weinberger, S B -- Cahill, J -- McCunney, S J -- New York, N.Y. -- Science. 1980 Feb 15;207(4433):905-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7188815" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Behavior/*drug effects ; Behavior, Animal/*drug effects ; Brain/metabolism ; Brain Chemistry/drug effects ; Dextroamphetamine/administration & dosage/*pharmacology ; Dopamine/metabolism ; Dose-Response Relationship, Drug ; Humans ; Male ; Motor Activity/drug effects ; Norepinephrine/metabolism ; Rats ; Serotonin/metabolism ; Stereotyped Behavior/*drug effects ; Time Factors
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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