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  • Cell Line  (192)
  • Time Factors  (191)
  • American Association for the Advancement of Science (AAAS)  (376)
  • Annual Reviews
  • Nature Publishing Group
  • 1980-1984  (277)
  • 1975-1979  (99)
  • 1960-1964
  • 1955-1959
  • 1930-1934
Collection
Keywords
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  • American Association for the Advancement of Science (AAAS)  (376)
  • Annual Reviews
  • Nature Publishing Group
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Year
  • 1
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    Cellular analysis of long-term habituation of the gill-withdrawal reflex of Aplysia californica (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-12-22
    Description: Long-term habituation training in Aplysia californica produces a profound depression in the efficacy of synaptic transmission between mechanoreceptor neurons and gill motor neurons. This depression persists for more than 3 weeks. Thus a critical synaptic site for plasticity underlying long-term habituation is the same as that for short-term habituation. For this simple form of learning, short- and long-term memory share a common locus and aspects of a common mechanism: synaptic depression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Castellucci, V F -- Carew, T J -- Kandel, E R -- New York, N.Y. -- Science. 1978 Dec 22;202(4374):1306-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/214854" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Aplysia ; Gills/physiology ; Habituation, Psychophysiologic/*physiology ; Mechanoreceptors/physiology ; Memory/*physiology ; Memory, Short-Term/physiology ; Motor Neurons/physiology ; *Reflex, Monosynaptic ; Retention (Psychology)/physiology ; Synaptic Membranes/physiology ; Synaptic Transmission ; Time Factors
    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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  • 2
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    Cellular interactions uncouple beta-adrenergic receptors from adenylate cyclase (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-11-17
    Description: C6 glioma cells and B104 neuroblastoma cells both possess adenylate cyclase activity, but only C6 cells have beta-adrenergic receptors. However, when cocultured with B104 cells, C6 cells show a marked decrease in their ability to accumulate adenosine 3', 5'-monophosphate upon stimulation with beta receptor agonists. Since both beta receptors and cholera toxin-stimulated adenylate cyclase activities are present in C6/B104 cocultures, we conclude that the beta receptor/adenylate cyclase transduction mechanism in cocultured C6 cells is uncoupled.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ciment, G -- de Vellis, J -- New York, N.Y. -- Science. 1978 Nov 17;202(4369):765-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/213832" target="_blank"〉PubMed〈/a〉
    Keywords: Adenylyl Cyclases/*metabolism ; *Cell Communication ; Cell Line ; Cholera Toxin/pharmacology ; Cyclic AMP/metabolism ; Enzyme Activation/drug effects ; Membrane Proteins/metabolism ; Protein Binding ; Receptors, Adrenergic/*metabolism ; Receptors, Adrenergic, beta/*metabolism
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  • 3
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    Rabies viruses increase in virulence when propagated in neuroblastoma cell culture (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-03-10
    Description: Several strains of attenuated rabies virus lacking the capacity to kill adult mice acquired a high lethal potential for mice after one to five serial passages in murine or human neuroblastoma cells. The virulence acquired after passage in neuroblastoma cells is a stable genetic trait retained during subsequent passage of viruses in nonneuroblastoma cell systems.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Clark, H F -- New York, N.Y. -- Science. 1978 Mar 10;199(4333):1072-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/628831" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Cells, Cultured ; Mice ; Neuroblastoma/*microbiology ; Neurons/microbiology ; Rabies Vaccines/toxicity ; Rabies virus/genetics/*pathogenicity ; Vaccines, Attenuated/toxicity ; Virus Replication
    Print ISSN: 0036-8075
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  • 4
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    Estrogen-binding sites in endothelial cell cultures (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-09-01
    Description: The cytosol extracted from a vascular endothelial cell line binds [3H]estradiol with high affinity and a high degree of specificity. In contrast, in experiments performed with cytosol labeled in the intact cell, progesterone and, to a smaller extent, testosterone gave an apparent inhibition of estradiol binding. These data support the concept that ovarian hormones may influence the role of the endothelium in various physiological and pathophysiological conditions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Colburn, P -- Buonassisi, V -- New York, N.Y. -- Science. 1978 Sep 1;201(4358):817-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/684408" target="_blank"〉PubMed〈/a〉
    Keywords: Aorta/*metabolism ; Cell Line ; Cytosol/metabolism ; Diethylstilbestrol/metabolism ; Endothelium/metabolism ; Estradiol/metabolism ; Progesterone/pharmacology ; Receptors, Estrogen/drug effects/*metabolism ; Testosterone/pharmacology
    Print ISSN: 0036-8075
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  • 5
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    Saturnine gout: lead-induced formation of guanine crystals (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-02-17
    Description: Intravenous injection of a sublethal dose of lead acetate into a domestic pig resulted in a 4.5-fold increase of guanine in the urine, indicating an impairment in the conversion of guanine to xanthine. This impairment is probably due to the inhibition of guanine aminohydrolase (guanase), since the activity of this enzyme is inhibited by Pb2+ (the inhibition constant being 3.0 X 10(-6)M). Postmortem histological examination revealed concretions of crystalline material in the epiphyseal plate of the femoral head. Extraction of the section containing the concretions showed that they were guanine. The relation of these findings to saturnine gout is discussed.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Farkas, W R -- Stanawitz, T -- Schneider, M -- New York, N.Y. -- Science. 1978 Feb 17;199(4330):786-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/622568" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Female ; Femur Head/pathology ; Gout/chemically induced/*metabolism/pathology ; Guanine/*biosynthesis/urine ; Lead/*adverse effects ; Swine ; Time Factors
    Print ISSN: 0036-8075
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  • 6
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    Thermoregulation is impaired in an environment without circadian time cues (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-02-17
    Description: Squirrel monkeys synchronized to a 24-hour light-dark cycle show a prominent circadian rhythm in body temperature which is regulated against mild environmental cold exposures throughout the 24-hour day. However, cold exposures produce significant decreases in core body temperature when the circadian rhythms of the animal are free-running in the absence of environmental time cues. Effective thermoregulation appears to require the precise internal synchronization of the circadian timekeeping system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fuller, C A -- Sulzman, F M -- Moore-Ede, M C -- New York, N.Y. -- Science. 1978 Feb 17;199(4330):794-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/414356" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Body Temperature Regulation ; *Circadian Rhythm ; Cold Temperature ; Cues ; *Environment ; Environmental Exposure ; Haplorhini ; Homeostasis ; Male ; Saimiri ; Time Factors
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  • 7
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    Trisodium phosphonoformate, a new antiviral compound (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-09-01
    Description: Trisodium phosphonoformate selectively inhibits cell-free DNA polymerase activity induced by herpesvirus. The new inhibitor has an antiviral effect on herpes simplex virus types 1 and 2, pseudorables virus, and infectious bovine rhinotracheitis virus in cell culture. It has a good therapeutic activity against cutaneous herpes simplex virus infection in guinea pigs.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Helgstrand, E -- Eriksson, B -- Johansson, N G -- Lannero, B -- Larsson, A -- Misiorny, A -- Noren, J O -- Sjoberg, B -- Stenberg, K -- Stening, G -- Stridh, S -- Oberg, B -- New York, N.Y. -- Science. 1978 Sep 1;201(4358):819-21.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/210500" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Antiviral Agents/therapeutic use/toxicity ; Cell Line ; DNA-Directed RNA Polymerases/*antagonists & inhibitors ; Formates/pharmacology/toxicity ; Guinea Pigs ; Herpesviridae Infections/drug therapy ; *Nucleic Acid Synthesis Inhibitors ; Organophosphorus Compounds/*pharmacology/toxicity ; Phosphonoacetic Acid/pharmacology ; Simplexvirus/enzymology
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  • 8
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    Postpartum amenorrhea: how is it affected by maternal nutritional status? (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-06-09
    Description: The average length of postpartum amenorrhea reported by breast-feeding women in rural Bangladesh in 1975 was 18 to 20 months. Its duration was found to be only slightly related to maternal nutritional status. There was no evidence of a threshold of weight for height necessary for the resumption of menses postpartum. Factors related to the duration of postpartum amenorrhea were maternal age, socioeconomic status, and supplemental feeding of the infant.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Huffman, S L -- Chowdhury, A K -- Mosley, W H -- New York, N.Y. -- Science. 1978 Jun 9;200(4346):1155-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/653359" target="_blank"〉PubMed〈/a〉
    Keywords: Amenorrhea/*etiology ; Body Water/metabolism ; Body Weight ; Female ; Humans ; Infant Nutritional Physiological Phenomena ; *Lactation ; Maternal Age ; Menstruation ; Nutrition Disorders/metabolism ; *Nutritional Physiological Phenomena ; *Postpartum Period ; Pregnancy ; Socioeconomic Factors ; Time Factors
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  • 9
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    Biological activity of some oxygenated sterols (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-08-11
    Description: A group of oxygenated sterols has been identified as potent and specific inhibitors of sterol biosynthesis. The ability of these compounds to inhibit sterol synthesis in cultured cells and the ineffectiveness of cholesterol under the same conditions suggest that feedback regulation of sterol biosynthesis may be brought about by an oxygenated sterol rather than by cholesterol. The nature of the regulatory sterol may vary in different cells with their specific requirements for cholesterol as a structural component or as a precursor of other steroid products. The use of oxygenated sterols to block sterol synthesis in cultured cells provides new information regarding the role of sterol in cell membrane structure and function. For example, de novo sterol synthesis is required for DNA synthesis and cell division by some cultured cells. Studies with cultured cells, and with rats and mice in vivo, suggest that oxygenated sterols could be of value in the treatment of several important human diseases.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kandutsch, A A -- Chen, H W -- Heiniger, H J -- New York, N.Y. -- Science. 1978 Aug 11;201(4355):498-501.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/663671" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/metabolism ; Cell Division ; Cell Line ; Cholesterol/biosynthesis/*metabolism ; Feedback ; Humans ; Hydroxycholesterols/*metabolism ; Hydroxymethylglutaryl CoA Reductases/metabolism ; Intestines/metabolism ; Ketosteroids/*metabolism ; Liver/metabolism
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  • 10
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    Rebound insomnia: a new clinical syndrome (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-09-15
    Description: Rebound insomnia followed the withdrawal of three benzodiazepine hypnotic drugs, each of which had been administered in a single nightly dose for only short-term periods. The intense worsening of sleep is attributed to the short duration of the action of these drugs. A hypothesis involving benzodiazepine receptors in the brain is proposed in which there is a delay or lag in replacement of endogenous benzodiazepine-like molecules after the abrupt withdrawal of exogenous drugs.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kales, A -- Scharf, M B -- Kales, J D -- New York, N.Y. -- Science. 1978 Sep 15;201(4360):1039-41.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/684426" target="_blank"〉PubMed〈/a〉
    Keywords: Benzodiazepines/*adverse effects/metabolism ; Brain/metabolism ; Flunitrazepam/adverse effects/metabolism ; Humans ; Hypnotics and Sedatives/*adverse effects/metabolism ; Nitrazepam/adverse effects/metabolism ; Receptors, Drug/drug effects/metabolism ; Sleep Initiation and Maintenance Disorders/*etiology/metabolism ; *Substance Withdrawal Syndrome/metabolism ; Syndrome ; Time Factors ; Triazolam/adverse effects/metabolism
    Print ISSN: 0036-8075
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  • 11
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    Inhibition of bone formation during space flight (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-09-22
    Description: Parameters of bone formation and resorption were measured in rats orbited for 19.5 days aboard the Soviet Cosmos 782 biological satellite. The most striking effects were on bone formation. During flight, rats formed significantly less periosteal bone than did control rats on the ground. An arrest line at both the periosteum and the endosteum of flight animals suggest that a complete cessation of bone growth occurred. During a 26-day postflight period, the defect in bone formation was corrected. No significant changes in bone resorption were observed.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Morey, E R -- Baylink, D J -- New York, N.Y. -- Science. 1978 Sep 22;201(4361):1138-41.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/150643" target="_blank"〉PubMed〈/a〉
    Keywords: *Aerospace Medicine ; Animals ; *Bone Development ; Bone Matrix/physiology ; Bone Resorption ; Male ; Periosteum/physiology ; Rats ; *Space Flight ; Specific Pathogen-Free Organisms ; Tetracycline ; Tibia/cytology/growth & development/physiology ; Time Factors ; Weightlessness
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  • 12
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    Enhancement of oncogenesis in C3H/10T1/2 mouse embryo cell cultures by saccharin (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-09-22
    Description: Impure and pure samples of saccharin (2 milligrams per milliliter) did not produce oncogenic transformation of C3H/10T1/2, clone 8, mouse embryo fibroblasts. However, after treatment of the cells with a nontransforming initiating dose (0.1 microgram per milliliter) of 3-methylcholanthrene, continuous treatment with either sample of saccharin (100 micrograms per milliliter) led to significant transformation. It is concluded that in this system saccharin is a cocarginogen, probably functioning as a promoting agent that is 1000-fold less active than the tumor promoter 12-O-tetradecanoyl-phorbol-13-acetate.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mondal, S -- Brankow, D W -- Heidelberger, C -- New York, N.Y. -- Science. 1978 Sep 22;201(4361):1141-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/684434" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Carcinogens ; Cell Line ; Cell Transformation, Neoplastic/*chemically induced ; Cocarcinogenesis ; Embryo, Mammalian ; Methylcholanthrene ; Mice ; Mice, Inbred C3H ; Saccharin/*pharmacology ; Tetradecanoylphorbol Acetate
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  • 13
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    Activity patterns of human skeletal muscles: relation to muscle fiber type composition (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-04-21
    Description: The muscle activity of normal ambulatory individuals was recorded continuously for 8-hour (working day) periods. Parameters of activity patterns were defined and numerical outcomes for these parameters were compared across a diverse population of muscles. Several pattern parameters, such as the average percentage of time active, were highly correlated with the percentage of type I fibers of a muscle.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Monster, A W -- Chan, H -- O'Connor, D -- New York, N.Y. -- Science. 1978 Apr 21;200(4339):314-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/635587" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Electromyography ; Humans ; Male ; *Muscle Contraction ; Muscles/anatomy & histology/*physiology ; Time Factors
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  • 14
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    Ammonia intoxication in the near-adult cat as a result of a dietary deficiency of arginine (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-01-27
    Description: Near-adult cats, fasted overnight, and given a single meal of a complete amino acid diet without arginine, developed hyperammonemia and showed clinical symptoms of ammonia toxicity within 2 hours. One cat (2.7 kilograms) died 4.5 hours after ingesting only 8 grams of the diet. Since ornithine also prevented hyperammonemia, it appears that the domestic cat cannot synthesize ornithine.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Morris, J G -- Rogers, Q R -- New York, N.Y. -- Science. 1978 Jan 27;199(4327):431-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/619464" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acids/metabolism ; Ammonia/*blood/toxicity ; *Animal Nutritional Physiological Phenomena ; Animals ; Arginine/*deficiency/metabolism ; Cats/*metabolism ; Female ; Male ; Ornithine/metabolism ; Time Factors
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  • 15
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    Growth inhibition of transformed cells with succinylated concanavalin A (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-09-01
    Description: Succinylated concanavalin A reversibly inhibits the growth of SV40 transformed mouse 3T3 cells and thus causes an accumulation of the cells in the G1 phase of the cell cycle. In a soft substrate (methylcellulose) succinylated concanavalin A also restores in transformed cells the growth behavior typical of untransformed cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mannino, R J -- Ballmer, K -- Burger, M M -- New York, N.Y. -- Science. 1978 Sep 1;201(4358):824-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/210502" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Adhesion/drug effects ; Cell Cycle/*drug effects ; Cell Line ; Cell Transformation, Neoplastic/*drug effects ; Concanavalin A/*analogs & derivatives/pharmacology ; Simian virus 40 ; Succinates
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  • 16
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    Generation of new mouse sarcoma viruses in cell culture (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-09-01
    Description: Endogenous nontumor-producing type C viruses from C3H mice were used to generate rapid, solid tumor-inducing variants in cell culture. The new mouse sarcoma viruses induce undifferentiated sarcomas with a short latency period upon inoculation into newborn NIH Swiss mice. Transforming viruses appear only transiently, at a time when the virus-infected cells show morphologic alterations; both before and after this time, transforming viruses cannot be detected. These results show that variants of endogenous type C virus which contain transforming genes (oncogenes) can arise during spread of the endogenous virus in fibroblast lines in vitro as well as in susceptible tissues in vivo.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rapp, U R -- Todaro, C -- New York, N.Y. -- Science. 1978 Sep 1;201(4358):821-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/210501" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; *Cell Transformation, Neoplastic ; Cell Transformation, Viral ; *Genes, Viral ; Mice ; Retroviridae/genetics/*pathogenicity ; Sarcoma Viruses, Murine/genetics/pathogenicity ; Sarcoma, Experimental/*microbiology
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  • 17
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    Attenuation of amnesia in rats by systemically administered enkephalins (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-04-07
    Description: The pentapeptides methionine-enkephalin and leucine-enkephalin are both able to reduce experimentally induced amnesia in rats. In contrast to the possible analgesic activity of these peptides, the anti-amnesic effect is seen after systemic administration of dosages of 30 micrograms or lower. The nature of the anti-amnesic effect is different for the two peptides.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rigter, H -- New York, N.Y. -- Science. 1978 Apr 7;200(4337):83-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/635578" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Avoidance Learning/*drug effects ; Carbon Dioxide/antagonists & inhibitors ; Dose-Response Relationship, Drug ; Endorphins/*pharmacology ; Enkephalins/*pharmacology ; Male ; Memory/*drug effects ; Rats ; Time Factors
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  • 18
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    Improving cognitive ability in chronically deprived children (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-04-21
    Description: Beginning at different ages in their preschool years, groups of chronically undernourished children from Colombian families of low socioeconomic status participated in a program of treatment combining nutritional, health care, and educational features. By school age the gap in cognitive ability between the treated children and a group of privileged children in the same city had narrowed, the effect being greater the younger the children were when they entered the treatment program. The gains were still evident at the end of the first grade in primary school, a year after the experiment had ended.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McKay, H -- Sinisterra, L -- McKay, A -- Gomez, H -- Lloreda, P -- New York, N.Y. -- Science. 1978 Apr 21;200(4339):270-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/635585" target="_blank"〉PubMed〈/a〉
    Keywords: Age Factors ; Child ; Child, Preschool ; Cognition/*physiology ; Education ; Environment ; Humans ; Learning Disorders/*prevention & control ; Nutrition Disorders/diet therapy/*physiopathology ; Nutritional Physiological Phenomena ; Socioeconomic Factors ; Time Factors
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 19
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    Potency in male rhesus monkeys: effects of continuously receptive females (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-04-28
    Description: Ejaculations decreased and mount latencies increased when intact males were paired regularly over a 3.5-year period (3180 tests) with ovariectomized females made constantly receptive by daily injections of estradiol. The deterioration in potency was abruptly and completely reversed by substituting a group of new but similarly treated females for the original ones.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Michael, R P -- Zumpe, D -- New York, N.Y. -- Science. 1978 Apr 28;200(4340):451-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/417398" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Ejaculation ; Female ; Haplorhini ; Macaca/*physiology ; Macaca mulatta/*physiology ; Male ; Pair Bond ; Periodicity ; Seasons ; Sexual Behavior, Animal/*physiology ; Testosterone/blood ; Time Factors
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  • 20
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    Oral cocaine: plasma concentrations and central effects (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-04-14
    Description: Cocaine (2.0 milligrams per kilogram) given by the oral route is at least as effective as the same dose given intranasally. Cocaine is not detected in the plasma until 30 minutes after oral administration, but peak plasma concentrations are similar after both routes. The subjective "highs" in man are greater after oral than after intranasal administration.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Van Dyke, C -- Jatlow, P -- Ungerer, J -- Barash, P G -- Byck, R -- New York, N.Y. -- Science. 1978 Apr 14;200(4338):211-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24895" target="_blank"〉PubMed〈/a〉
    Keywords: Administration, Intranasal ; Administration, Oral ; Adult ; Cocaine/*administration & dosage/blood/pharmacology ; Euphoria/drug effects ; Humans ; Hydrogen-Ion Concentration ; Intestinal Absorption ; Male ; Time Factors
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  • 21
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    Effects of naloxone on schizophrenia: reduction in hallucinations in a subpopulation of subjects (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-07-07
    Description: Endogenous opiate-like peptides (endorphins) are putative neuroregulators located throughout the mammalian brainstem. There is some evidence for their role in pain, stress, and affect. We report that the opiate antagonist, naloxone, alters some schizophrenic symptoms. In a double-blind, cross-over study, naloxone produced decreases in auditory hallucinations in some schizophrenic patients. This finding supports the hypothesis that the endorphins may play a roll in modulating hallucinations in a highly selected subgroup of chronically hallucinating schizophrenic patients.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Watson, S J -- Berger, P A -- Akil, H -- Mills, M J -- Barchas, J D -- New York, N.Y. -- Science. 1978 Jul 7;201(4350):73-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/351804" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Chronic Disease ; Clinical Trials as Topic ; Dose-Response Relationship, Drug ; Double-Blind Method ; Endorphins/physiology ; Hallucinations/*drug therapy ; Humans ; Male ; Naloxone/administration & dosage/*therapeutic use ; Schizophrenia/*drug therapy/physiopathology ; Schizophrenia, Paranoid/drug therapy ; Time Factors
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  • 22
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    Dyskinesias evoked in monkeys by weekly administration of haloperidol (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-05-19
    Description: In two cebus (Cebus albifrons) monkeys given weekly oral doses of 0.25 milligram of haloperidol per kilogram, movement disorders appeared 1 to 8 hours after drug administration following the tenth weekly dose. These disorders included oral movements, peculiar postures, writhing, and stretching. Such reactions faded in intensity after the next two doses. Increasing the dose to 0.5 milligram per kilogram has elicited the disorders reliably after each weekly dose for almost 2 years. Similar reactions also developed in a squirrel monkey (Saimiri sciurea) treated weekly with haloperidol and in a third cebus monkey previously maintained for a year on a regimen of 0.25 milligram of haloperidol per kilogram on 5 days per week. These findings suggest an experimental model for determining the etiology of drug-induced movement disorders. They also suggest an unrecognized clinical problem.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Weiss, B -- Santelli, S -- New York, N.Y. -- Science. 1978 May 19;200(4343):799-801.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/417399" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Disease Models, Animal ; Dyskinesia, Drug-Induced/*etiology ; *Haloperidol/administration & dosage ; Haplorhini ; Time Factors
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  • 23
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    Durations of unitary synaptic potentials help time a behavioral sequence (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-02-03
    Description: Recordings in identified neurons and muscles that mediate crayfish tailflips reveal inhibitory postsynaptic potentials of two distinct durations. Those of long duration are recorded in five classes of cells in the flexion circuit, while those of short duration are recorded in three classes of cells in the extension circuit. The durations of the inhibitory postsynaptic potentials are matched to the durations of inhibition required by the different phases of the behavior.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wine, J -- Hagiwara, G -- New York, N.Y. -- Science. 1978 Feb 3;199(4328):557-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/622557" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Astacoidea/physiology ; Behavior, Animal/*physiology ; Escape Reaction/physiology ; Interneurons/physiology ; Membrane Potentials ; Motor Neurons/physiology ; Movement ; Muscles/*physiology ; Neural Inhibition ; Synaptic Membranes/*physiology ; Time Factors
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  • 24
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    Antibody diversity (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-10-06
    Description: Three important aspects of immunoglobulin gene organization and structure have emerged from studies of cloned immunoglobulin kappa chain genes. (i) Multiple variable genes are encoded separately in the genome of both immunoglobulin-producing and uncommitted (embryonic) cells, thereby establishing the evolutionary base for generating immunoglobulin diversity. (ii) These genes exist as many small, closely related families (subgroups) that share close sequence homology largely within their own subgroup. (iii) Comparison of two cloned variable gene segments derived from a single subgroup reveals a feature of their structure that distinguishes them from fixed genes (that is, globin genes) and provides, through extensive surrounding sequence homology, a large target for intergenic recombination. This last observation suggests that a simple recombination mechanism may account for their genetic instability in both germ line and somatic cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Seidman, J G -- Leder, A -- Nau, M -- Norman, B -- Leder, P -- New York, N.Y. -- Science. 1978 Oct 6;202(4363):11-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/99815" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Antibody Specificity ; Base Sequence ; Binding Sites, Antibody/*genetics ; Biological Evolution ; Cell Line ; Embryo, Mammalian/immunology ; *Genes ; Immunoglobulin Constant Regions/*genetics ; Immunoglobulin Light Chains/*genetics ; Immunoglobulin Variable Region/*genetics ; Immunoglobulin kappa-Chains/*genetics ; Immunoglobulins/*genetics ; Mice ; Neoplasms, Experimental/immunology ; Plasmacytoma/immunology ; Recombination, Genetic
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  • 25
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    Light and efferent activity control rhabdom turnover in Limulus photoreceptors (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-10-19
    Description: Photosensitive membrane structures in the retinular cells of the Limulus lateral eye are broken down and renewed daily. The first light onset causes a rapid, synchronous disassembly and buildup of the rhabdom in each photoreceptor cell. The entire process is complete within 30 minutes. Blocking the efferent input to the retina from the brain blocks the turnover of the rhabdom, and mimicking the efferent input by optic nerve stimulation restores it.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chamberlain, S C -- Barlow, R B Jr -- New York, N.Y. -- Science. 1979 Oct 19;206(4416):361-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/482946" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Efferent Pathways/physiology ; Electric Stimulation ; Horseshoe Crabs/*physiology ; *Light ; Optic Nerve/physiology ; Photoreceptor Cells/cytology/*physiology ; Regeneration ; Retina/cytology/physiology ; Time Factors
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  • 26
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    Microsecond sensitivity of the human visual system to irregular flicker (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-11-09
    Description: A flickering light presented to the eye produces a small alternating voltage at the scalp of a subject. This alternating voltage indicates the following response of the brain to the flicker. If every other flash in the flicker is displaced temporally by as little as 30 microseconds, an asymmetry appears in the brain's alternating voltage. The results suggest an underlying mechanism that may enhance visual detection of high-frequency flicker.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Diamond, A L -- New York, N.Y. -- Science. 1979 Nov 9;206(4419):708-10.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/493977" target="_blank"〉PubMed〈/a〉
    Keywords: Evoked Potentials ; Flicker Fusion/physiology ; Humans ; Time Factors ; *Vision, Ocular
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  • 27
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    Thiourea reverses cross-links and restores biological activity in DNA treated with dichlorodiaminoplatinum (II) (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-04-13
    Description: Cis and trans dichlorodiaminoplatinum (II) compounds bind to DNA and form DNA cross-links, which are usually considered to be irreversible. Thiourea can reverse these cross-links without any apparent breakdown of the DNA. In addition, cis- and trans-Pt (II) treatment of lambda decreases its transfectivity. After suitable incubation with thiourea, full transfectivity of Pt(II)-treated lambda DNA can be restored.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Filipski, J -- Kohn, K W -- Prather, R -- Bonner, W M -- New York, N.Y. -- Science. 1979 Apr 13;204(4389):181-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/571145" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Coliphages ; DNA/*metabolism ; DNA, Neoplasm/metabolism ; DNA, Viral/metabolism ; Leukemia L1210 ; Organoplatinum Compounds/*antagonists & inhibitors ; Structure-Activity Relationship ; Thiourea/*pharmacology
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  • 28
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    Difference between postpartum and nutritional amenorrhea (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-03-02
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Frisch, R E -- McArthur, J W -- New York, N.Y. -- Science. 1979 Mar 2;203(4383):921-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/419411" target="_blank"〉PubMed〈/a〉
    Keywords: Amenorrhea/*etiology/physiopathology ; Body Weight ; Female ; Humans ; Lactation ; Nutrition Disorders/complications ; Pregnancy ; Time Factors
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  • 29
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    Genetic mechanism accounting for precise immunoglobulin domain deletion in a variant of MPC 11 myeloma cells (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-12-14
    Description: A variant of the MPC 11 cell line, M 311, produces a short immunoglobulin heavy chain. When compared with the parental gamma 2b heavy chain, M 311 was found to have a carboxyl terminal deletion comprising the CH3 domain. The COOH-terminal cyanogen bromide (CNBr) cleavage fragment of M 311 is identical to a corresponding segment ofa parental heavy chain CNBr fragment, with the exception of a substitution of asparagine for lysine at the COOH-terminal residue. This observation enabled prediction of both the parental DNA sequence in this region and the genetic mechanism which generated the variant, a frameshift followed by premature termination. This hypothesis is supported by studies of the DNA sequence of the MPC 11 gamma 2b constant region gene.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kenter, A L -- Birshtein, B K -- R21 AI106328/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1979 Dec 14;206(4424):1307-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/117550" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Chromosome Deletion ; Genes ; Immunoglobulin G/*genetics ; Immunoglobulin gamma-Chains/genetics ; Macromolecular Substances ; Melphalan/pharmacology ; Mice ; Mutation ; Myeloma Proteins/*genetics ; Neoplasms, Experimental/genetics ; Peptide Chain Termination, Translational ; Plasmacytoma/genetics
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  • 30
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    Movement disorders of aged rats: reversal by dopamine receptor stimulation (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-10-26
    Description: When placed in a tank of water, aged rats (24 to 27 months old) showed marked impairments in swimming. Compared with young adult rats (3 to 4 months old), the older animals moved their limbs less vigorously and were less successful in keeping their heads above water. The young, but not old, rats maintained a position nearly horizontal to the water surface and planed across it. These movement dysfunctions of aged rats resemble those seen in young adult animals that have sustained injury to brain dopamine-containing neurons. The swimming impairments of the aged rats were reversed by the dopamine receptor stimulant apomorphine and by the biosynthetic precursor of dopamine, L-dopa. Thus, age-related alterations in brain dopaminergic systems may be responsible for some of the movement disturbances associated with senescence.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marshall, J F -- Berrios, N -- New York, N.Y. -- Science. 1979 Oct 26;206(4417):477-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/504992" target="_blank"〉PubMed〈/a〉
    Keywords: *Aging ; Animals ; Apomorphine/therapeutic use ; Levodopa/therapeutic use ; Male ; Movement Disorders/drug therapy/*physiopathology ; Rats ; Receptors, Dopamine/*physiology ; Swimming ; Time Factors
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  • 31
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    Pharmacologic effects in man of a potent, long-acting dopamine receptor agonist (1979)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1979-09-14
    Description: Single-dose administration of pergolide mesylate (100 to 400 micrograms) results in a dose-related inhibition of prolactin secretion which persists for more than 24 hours. During multiple-dose administration of pergolide, plasma prolactin concentrations remain markedly reduced (greater than 80 percnet) and gradually return to control levels several days after drug administration is discontinued.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lemberger, L -- Crabtree, R E -- New York, N.Y. -- Science. 1979 Sep 14;205(4411):1151-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/382359" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Clinical Trials as Topic ; Dose-Response Relationship, Drug ; Ergolines/*pharmacology/therapeutic use ; Humans ; Informed Consent ; Male ; Middle Aged ; Placebos ; Prolactin/blood ; Receptors, Dopamine/*drug effects ; Time Factors
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  • 32
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    DNA synthesis and mitosis in adult amphibian cardiac muscle cells in vitro (1979)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1979-09-21
    Description: High-resolution autoradiography and fine structural analysis of adult newt heart tissue in long-term culture revealed that tritiated thymidine was concentrated in the nuclei of dedifferentiated myocardial cells. Mitotic chromosomes were observed in some of these cells. This demonstrates that adult amphibian myocardial cells in vitro are capable of DNA synthesis and mitosis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nag, A C -- Healy, C J -- Cheng, M -- New York, N.Y. -- Science. 1979 Sep 21;205(4412):1281-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/472744" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Division ; Cells, Cultured ; DNA/*biosynthesis ; *Mitosis ; Muscle Proteins/metabolism ; Myocardial Contraction ; Myocardium/*metabolism ; Salamandridae ; Time Factors
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  • 33
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    Perception of echo phase information in bat sonar (1979)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1979-06-22
    Description: Echolocating bats (Eptesicus fuscus) can detect changes as small as 500 nanoseconds in the arrival time of sonar echoes when these changes appear as jitter or alternations in arrival time from one echo to the next. The psychophysical function relating the bat's performance to the magnitude of the jitter corresponds to the half-wave rectified cross-correlation function between the emitted sonar signals and the echoes. The bat perceives the phase or period structure of the sounds, which cover the 25- to 100-kilohertz frequency range, as these are represented in the auditory system after peripheral transformation. The acoustic image of a sonar target is apparently derived from time-domain or periodicity information processing by the nervous system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Simmons, J A -- New York, N.Y. -- Science. 1979 Jun 22;204(4399):1336-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/451543" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Auditory Perception/*physiology ; Chiroptera/*physiology ; Echolocation/*physiology ; Movement ; Orientation/*physiology ; Time Factors
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  • 34
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    Harmonic-sensitive neurons in the auditory cortex of the mustache bat (1979)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1979-01-19
    Description: Human speech and animal sounds contain phonemes with prominent and meaningful harmonics. The biosonar signals of the mustache bat also contain up to four harmonics, and each consists of a long constant-frequency component followed by a short frequency-modulated component. Neurons have been found in a large cluster within auditory cortex of this bat whose responses are facilitated by combinations of two or more harmonically related tones. Moreover, the best frequencies for excitation of these neurons are closely associated with the constant-frequency components of the biosonar signals. The properties of these neurons make them well suited for identifying the signals produced by other echolocating mustache bats. They also show how meaningful components of sound are assembled by neural circuits in the central nervous system and suggest a method by which sounds with important harmonics (or formants) may be detected and recognized by the brain in other species, including humans.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Suga, N -- O'Neill, W E -- Manabe, T -- New York, N.Y. -- Science. 1979 Jan 19;203(4377):270-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/760193" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Animals ; Auditory Cortex/cytology/*physiology ; Auditory Pathways/physiology ; Auditory Perception/*physiology ; Chiroptera/*physiology ; Echolocation/physiology ; Neurons/physiology ; Time Factors
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    Interaction of laminae of the cingulate cortex with the anteroventral thalamus during behavioral learning (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-05-30
    Description: Neurons in deep laminae of the rabbit cingulate cortex develop discriminative activity at an early stage of behavioral discrimination learning, whereas neurons in the anteroventral nucleus of thalamus and neurons in the superficial cortical laminae develop such activity in a late stage of behavioral learning. It is hypothesized that early-forming discriminative neuronal activity, relayed to anteroventral neurons via the corticothalamic pathway, contributes to the construction of changes underlying the late-forming neuronal discrimination in the anteroventral nucleus. The resultant late discriminative activity in the anteroventral nucleus is then relayed via the thalamocortical pathway back to the superficial cortical laminae, promoting disengagement of cortex from further task-processing.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gabriel, M -- Foster, K -- Orona, E -- New York, N.Y. -- Science. 1980 May 30;208(4447):1050-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7375917" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Avoidance Learning/*physiology ; Brain Mapping ; Cerebral Cortex/cytology/*physiology ; Discrimination (Psychology)/*physiology ; Gyrus Cinguli/*physiology ; Neural Pathways/physiology ; Rabbits ; Thalamus/*physiology ; Time Factors
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    Preserved learning and retention of pattern-analyzing skill in amnesia: dissociation of knowing how and knowing that (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-10-10
    Description: Amnesic patients acquired a mirror-reading skill at a rate equivalent to that of matched control subjects and retained it for at least 3 months. The results indicate that the class of preserved learning skills in amnesia is broader than previously reported. Amnesia seems to spare information that is based on rules or procedures, as contrasted with information that is data-based or declarative--"knowing how rather than "knowing that." The results support the hypothesis that such a distinction is honored by the nervous system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cohen, N J -- Squire, L R -- 1P50 MH 30914/MH/NIMH NIH HHS/ -- MH24600/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1980 Oct 10;210(4466):207-10.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7414331" target="_blank"〉PubMed〈/a〉
    Keywords: Alcohol Amnestic Disorder/physiopathology ; Amnesia/*physiopathology ; Electroconvulsive Therapy ; *Form Perception ; Humans ; Learning/*physiology ; *Pattern Recognition, Visual ; Reading ; Retention (Psychology)/physiology ; Time Factors
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    Computers, health care, and medical information science (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-10-17
    Description: The clinical laboratory is examined as a microcosm of the entire health care delivery system. The introduction of computers into the clinical laboratory raises issues that are difficult to resolve by the methods of information science or medical science applied in isolation. The melding of these two disciplines, together with the contributions of other disciplines, has created a new field of study called medical information science. The emergence of this new discipline and some specific problem-solving approaches used in its application in the clinical laboratory are examined.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lincoln, T L -- Korpman, R A -- New York, N.Y. -- Science. 1980 Oct 17;210(4467):257-63.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6999622" target="_blank"〉PubMed〈/a〉
    Keywords: Clinical Laboratory Techniques/*instrumentation ; Costs and Cost Analysis ; *Delivery of Health Care/economics ; Diagnosis, Computer-Assisted/*methods ; Humans ; Information Systems ; Time Factors
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    Specific reading disability: differences in contrast sensitivity as a function of spatial frequency (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-10-01
    Description: Contrast thresholds for sine-wave gratings of spatial frequencies of 2, 4, 12, and 16 cycles per degree were determined for normal and disabled readers at a range of stimulus durations. Normal readers demonstrated monotonically decreasing sensitivity with increasing spatial frequency at exposure durations between 40 and 100 milliseconds. At exposure durations of 150 to 1000 milliseconds, they showed peak sensitivity at 4 cycles per degree. In comparison, disabled readers showed monotonically decreasing sensitivity with increasing spatial frequency at all stimulus durations. The difference in sensitivity pattern across spatial frequencies was greatest at stimulus durations approximately equal to fixation durations during reading.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lovegrove, W J -- Bowling, A -- Badcock, D -- Blackwood, M -- New York, N.Y. -- Science. 1980 Oct;210(4468):439-40.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7433985" target="_blank"〉PubMed〈/a〉
    Keywords: Afterimage/physiology ; Dyslexia/*physiopathology ; Humans ; Space Perception/physiology ; Time Factors ; Visual Perception/*physiology
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  • 39
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    Elevated cerebrospinal fuid norepinephrine in schizophrenics: confounding effects of treatment drugs (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-10-03
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lipsky, J J -- New York, N.Y. -- Science. 1980 Oct 3;210(4465):97.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6106286" target="_blank"〉PubMed〈/a〉
    Keywords: Antipsychotic Agents/*pharmacology ; Humans ; Norepinephrine/*cerebrospinal fluid ; Research Design ; Schizophrenia/*cerebrospinal fluid/drug therapy ; Time Factors
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  • 40
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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)
    Details
    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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  • 41
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    Vitamin D deficiency inhibits pancreatic secretion of insulin (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    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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  • 42
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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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    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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    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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    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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  • 46
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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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  • 47
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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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    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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  • 49
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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)
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    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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    Multiple daily amphetamine administration: behavioral and neurochemical alterations (1980)
    American Association for the Advancement of Science (AAAS)
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    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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    Rate of acoustic change may underlie hemispheric specialization for speech perception (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-03-21
    Description: Phonemically similar syllables, differing only by temporal acoustic cues, were presented dichotically to investigate temporal processing mechanisms in hemispheric specialization for speech. Reducing the rate of acoustic change within syllables while keeping their phonemic characteristics constant significantly decreased the characteristic asymmetry in processing speech.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schwartz, J -- Tallal, P -- New York, N.Y. -- Science. 1980 Mar 21;207(4437):1380-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7355297" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Auditory Pathways/physiology ; Auditory Perception/*physiology ; Brain/*physiology ; Female ; *Functional Laterality ; Humans ; Linguistics ; Male ; Speech Perception/*physiology ; Time Factors
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    GABA analogues activate channels of different duration on cultured mouse spinal neurons (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-04-17
    Description: Voltage-clamp recordings from mouse spinal neurons grown in culture were used to study the membrane current fluctuations induced by 12 substances structurally similar to gamma-aminobutyric acid (GABA). Fluctuation analysis provided estimates of the electrical properties of the elementary events underlying these responses. Estimates of the mean conductance of channels activated by all of the substances except glycine did not differ significantly from that estimated for GABA, whereas mean durations of agonist-activated channels all differed significantly from that found for GABA. The results indicate that all of the substances tested except glycine activate channels of similar conductance but of different durations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barker, J L -- Mathers, D A -- New York, N.Y. -- Science. 1981 Apr 17;212(4492):358-61.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6259733" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Membrane/drug effects ; Ion Channels/*drug effects ; Membrane Potentials/drug effects ; Mice ; Neurons/drug effects ; Receptors, Cell Surface/metabolism ; Receptors, GABA-A ; Spinal Nerves/*drug effects ; Structure-Activity Relationship ; Time Factors ; gamma-Aminobutyric Acid/*analogs & derivatives/pharmacology
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    Stepwise sarcomere shortening: analysis by high-speed cinemicrography (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-09-25
    Description: Sarcomere shortening in striated muscle appears to follow a regionally synchronized staircase-like time course not anticipated in some cross-bridge models. The visualization method used has been criticized as subject to Bragg diffraction effects. Two independent optical methods were used to visualize a muscle during contraction; agreement between the stepwise behavior observed with the two methods suggests that the phenomenon is genuine.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Delay, M J -- Ishide, N -- Jacobson, R C -- Pollack, G H -- Tirosh, R -- New York, N.Y. -- Science. 1981 Sep 25;213(4515):1523-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7280674" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Motion Pictures as Topic ; *Muscle Contraction ; Muscles/*ultrastructure ; Ranidae ; Time Factors
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    Renin and angiotensin: the complete system within the neuroblastoma x glioma cell (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-11-20
    Description: Cells of the homogeneous hybrid line neuroblastoma x glioma (NG108-15) have many neuronal properties. Immunocytochemical tests show that they contain both immunoreactive renin and angiotensin; direct radioimmunoassays show that they are positive for renin, angiotensin I, and angiotensin II; enzymatic assays show that they contain angiotensinogen and converting enzyme as well. The renin appears to be present in an enzymatically inactive form that can be activated by trypsin and then blocked by antiserum to purified mouse submaxillary renin. Renin concentration and activity are increased by enhancing cellular differentiation with dibutyryl cyclic adenosine monophosphate or by serum withdrawal. These findings demonstrate a complete renin-angiotensin system within these neuron-like cells, and suggest that activation of intracellular renin could generate angiotensin II.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fishman, M C -- Zimmerman, E A -- Slater, E E -- HL-21247/HL/NHLBI NIH HHS/ -- HL-24105/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1981 Nov 20;214(4523):921-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6272392" target="_blank"〉PubMed〈/a〉
    Keywords: Angiotensin I/*analysis ; Angiotensin II/*analysis ; Angiotensins/*analysis ; Animals ; Cell Line ; Cricetinae ; Glioma/*metabolism ; Hybrid Cells/*metabolism ; Mice ; Neuroblastoma/*metabolism ; Peptidyl-Dipeptidase A/metabolism ; Radioimmunoassay ; Rats ; Renin/*metabolism
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    Increased intracranial self-stimulation in rats after long-term administration of desipramine (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-11-06
    Description: The effects of long- and short-term administration of the tricyclic antidepressant desipramine on intracranial self-stimulation in rats were studied with electrodes in the A10 region of the dopamine-containing cell bodies of the ventromedial tegmentum. Long-term desipramine administration resulted in a significant shift to the left in the ascending portion of the rate--current intensity function, indicating that the activity of the mesolimbic dopamine system was enhanced. These findings point to a possible dopaminergic mechanism of action of antidepressants and support speculations concerning the role of dopamine-containing neurons in the pathophysiology of depression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fibiger, H C -- Phillips, A G -- New York, N.Y. -- Science. 1981 Nov 6;214(4521):683-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7197394" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Depression/physiopathology ; Desipramine/*administration & dosage ; Dopamine/*physiology ; Humans ; Limbic System/*physiology ; Male ; Rats ; Rats, Inbred Strains ; Self Stimulation/*drug effects ; Time Factors
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    Malignant potential of murine stromal cells after transplantation of human tumors into nude mice (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-04-03
    Description: Human malignant cancer tumors grafted into nude mice produce tumors containing both human cancer cells and the host's stromal cells. After short-term propagation of these tumors in vitro, the murine mesenchymal cells appear transformed and are tumorigenic in nude mice. However, established human cancer cell lines fail to similarly after adjacent murine stromal cells when used to produce tumors in nude mice. These experiments suggest that cancer cells may recruit normal cells to become malignant, qualifying the view of the clonal (unicellular) origin of cancer.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Goldenberg, D M -- Pavia, R A -- 1R01 CA17198/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1981 Apr 3;212(4490):65-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7209521" target="_blank"〉PubMed〈/a〉
    Keywords: Adenocarcinoma/pathology ; Animals ; Cell Line ; Cells, Cultured ; Colonic Neoplasms/pathology ; Fibrosarcoma/*etiology ; Humans ; Karyotyping ; Mice ; Mice, Inbred BALB C ; Mice, Nude ; Middle Aged ; Neoplasm Transplantation ; Neoplasms, Experimental/*etiology ; Transplantation, Heterologous
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    Merkel cell receptors: structure and transducer function (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-10-09
    Description: An electron microscopic and electrophysiological investigation was made of Merkel cell-neurite complexes in the sinus hair follicles of the cat. These mechanoreceptors respond with very precise phase locking to heavy-frequency vibratory stimuli as well as to static hair displacements. The mechanoelectric transduction process is faster than that known for any other somatic mechanoreceptor. These data show that the nerve endings themselves and not the Merkel cells are the mechanoelectric transducer elements in these receptors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gottschaldt, K M -- Vahle-Hinz, C -- New York, N.Y. -- Science. 1981 Oct 9;214(4517):183-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7280690" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Animals ; Cats ; Cytoplasmic Granules/ultrastructure ; Evoked Potentials ; Mechanoreceptors/*cytology/physiology ; Microscopy, Electron ; Skin/*innervation/ultrastructure ; Time Factors
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    Calcium-dependent prolonged effects on melanophores of [4-norleucine, 7-D-phenylalanine]-alpha-melanotropin (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-08-28
    Description: A single injection of the melanotropin analog [4-norleucine, 7-D-phenylalanine]-alpha-melanotropin into frogs (Rana pipiens) caused near maximum darkening of the skins of the frogs for at least 6 weeks. Injections of the natural hormone alpha-melanotropin or of the analog [Nle4]-alpha-melanotropin also caused darkening, but this effect lasted only a few days. Morphological examination of the skins of frogs injected with [Nle4, D-Phe7]-alpha-melanotropin revealed that both dermal and epidermal melanophores were dispersed during the entire 6-week period. In vitro [Nle4, D-Phe7]-alpha-melanotropin also causes prolonged darkening of the skin of the lizard Anolis carolinensis. In the absence of the melanotropin, skins previously darkened with the analog could be lightened by removal of calcium from the incubation medium but could then be redarkened by adding calcium. The cycle could be repeated indefinitely without addition of melanotropin. These results demonstrate the role of calcium in receptor signal transduction and the prolonged biological effects of [Nle4, D-Phe7]-alpha-melanotropin long after its removal from the assay medium.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hadley, M E -- Anderson, B -- Heward, C B -- Sawyer, T K -- Hruby, V J -- AM-17420/AM/NIADDK NIH HHS/ -- CA-20547/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1981 Aug 28;213(4511):1025-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6973820" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Calcium/*pharmacology ; Lizards ; Melanocyte-Stimulating Hormones/*analogs & derivatives/pharmacology ; Melanophores/*drug effects/ultrastructure ; Rana pipiens ; Skin/ultrastructure ; Skin Pigmentation/*drug effects ; Time Factors ; *alpha-MSH/*analogs & derivatives
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    Retroactive interference in discrimination learning (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-12-11
    Description: In stage 1 of this experiment pigeons were trained to discriminate between two levels of noise or two colors by pecking on one of two disks. In stage 2 the discriminative stimuli were not presented, but pecking on the disks was rewarded on a random schedule. The second procedure caused the pigeons to forget the discrimination they had learned.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Heinemann, E G -- Sage-Day, J -- Brenner, N -- MH 18246/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1981 Dec 11;214(4526):1254-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7302595" target="_blank"〉PubMed〈/a〉
    Keywords: Acoustic Stimulation ; Animals ; Columbidae ; *Discrimination (Psychology) ; Photic Stimulation ; Time Factors
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    Insulin as a potent, specific growth factor in a rat hepatoma cell line (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-02-27
    Description: A line or rat hepatoma cells in culture which, in response to serum starvation, become arrested in the early G1 phase of growth, can be stimulated by insulin alone to enter the cell cycle and traverse S phase. A half-maximum response is observed at 30 to 70 picomolar concentrations and the maximum response is essentially identical to that found with optimum serum concentrations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Koontz, J W -- Iwahashi, M -- AM 24047/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1981 Feb 27;211(4485):947-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7008195" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Cycle/drug effects ; Cell Division/drug effects ; Cell Line ; *Growth Substances ; Insulin/*pharmacology ; Liver Neoplasms, Experimental/*pathology ; Mitosis/drug effects ; Proinsulin/pharmacology ; Rats ; Structure-Activity Relationship
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    Sexual differentiation of the central nervous system (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-03-20
    Description: Sexual differentiation of reproductive and behavior patterns is largely effected by hormones produced by the gonads. In many higher vertebrates, an integral part of this process is the induction of permanent and essentially irreversible sex differences in central nervous function, in response to gonadal hormones secreted early in development.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉MacLusky, N J -- Naftolin, F -- New York, N.Y. -- Science. 1981 Mar 20;211(4488):1294-302.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6163211" target="_blank"〉PubMed〈/a〉
    Keywords: Androgens/metabolism/physiology ; Animals ; Birds/physiology ; Brain/metabolism ; Central Nervous System/*embryology/physiology ; Estrogens/physiology ; Female ; Humans ; Male ; Mammals/physiology ; Morphogenesis ; Ovary/secretion ; Receptors, Cell Surface/metabolism ; Receptors, Steroid/metabolism ; Sex Characteristics ; Sex Determination Analysis ; *Sex Differentiation ; Testis/secretion ; Time Factors ; alpha-Fetoproteins/physiology
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    A monosialoganglioside is a monoclonal antibody-defined antigen of colon carcinoma (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-04-03
    Description: The antigen of a monoclonal antibody that is specific for cells of human carcinoma of the colon is a monosialoganglioside as determined by the direct binding of antibody to thin-layer chromatograms of total lipid extracts of tissues. Binding of antibody to chromatograms is detected by autoradiography after the application of iodine-125-labeled F(ab')2 of rabbit immunoglobulin G antibodies to mouse immunoglobulins.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Magnani, J L -- Brockhaus, M -- Smith, D F -- Ginsburg, V -- Blaszczyk, M -- Mitchell, K F -- Steplewski, Z -- Koprowski, H -- CA-10815/CA/NCI NIH HHS/ -- CA-21124/CA/NCI NIH HHS/ -- RR-05540/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1981 Apr 3;212(4490):55-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7209516" target="_blank"〉PubMed〈/a〉
    Keywords: Adenocarcinoma/*immunology ; Antibodies, Neoplasm/*immunology ; Antibody Specificity ; Antigens, Neoplasm/*immunology/isolation & purification ; Cell Line ; Chromatography, Thin Layer ; Colonic Neoplasms/*immunology ; Gangliosides/*immunology/isolation & purification ; Humans ; Melanoma/immunology ; Neuraminidase/pharmacology
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    Growth inhibition by adenosine 3',5-monophosphate derivatives does not require 3',5' phosphodiester linkage (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-09-04
    Description: Analogs of adenosine 3',5'-monophosphate (cyclic AMP) inhibit the growth of cultured cell lines. The effects of 8-bromo- and N6-butyryl-substituted analogs of cyclic and noncyclic AMP on six cell lines were examined and were equally inhibitory. Variant cell lines with altered cyclic AMP-dependent protein kinase were more resistant to both cyclic and noncyclic nucleotides. We conclude that growth inhibition by analogs of cyclic AMP (i) does not require a 3',5' phosphodiester bond and (ii) may be mediated by a pathway involving endogenous cyclic AMP.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Martin, T F -- Kowalchyk, J A -- AM 25861/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1981 Sep 4;213(4512):1120-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6267695" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Division/*drug effects ; Cell Line ; Cricetinae ; Cyclic AMP/*pharmacology ; DNA/biosynthesis ; Growth Inhibitors/*pharmacology ; Mice ; Phosphodiesterase Inhibitors/pharmacology ; Structure-Activity Relationship
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    Electroconvulsive shock increases tyrosine hydroxylase activity in the brain and adrenal gland of the rat (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-11-06
    Description: A single application of electroconvulsive shock produced a rapid but short-lasting increase in tyrosine hydroxylase activity above control values in the rat adrenal medulla and striatum. After repeated electroconvulsive shock treatment (once per day for 7 days), tyrosine hydroxylase activity increased significantly in the locus ceruleus, nucleus of the tractus solitarius, hippocampus, cerebellum, and frontal cortex and remained elevated for 4 to 8 days. Adrenal tyrosine hydroxylase activity increased 1 day after the termination of repeated electroconvulsive shock treatments and remained elevated for at least 24 days, possibly reflecting the establishment of a new and higher steady-state level of catecholamine biosynthesis in the adrenal. These findings suggest that the persistent changes in tyrosine hydroxylase activity produced by repeated electroconvulsive shock may be a factor contributing to the long-lasting antidepressant effects of this treatment.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Masserano, J M -- Takimoto, G S -- Weiner, N -- NS 07927/NS/NINDS NIH HHS/ -- NS 09199/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1981 Nov 6;214(4521):662-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6117127" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenal Glands/*enzymology ; Animals ; Brain/*enzymology ; Corpus Striatum/enzymology ; *Electroshock ; Enzyme Induction ; Locus Coeruleus/enzymology ; Male ; Rats ; Rats, Inbred Strains ; Time Factors ; Tyrosine 3-Monooxygenase/*metabolism
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    Human lupus inclusions and interferon (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-08-14
    Description: Raji cells, a human B lymphoblastoid cell line of Burkitt lymphoma origin, formed lupus inclusions when grown in a medium conditioned by the growth of Raji cells whose DNA thymidine residues had been unifilarly (single-strandedly) substituted with bromodeoxyuridine. Ultracentrifugation of this medium in excess of that required to remove Epstein-Barr virus and all other known mammalian viruses did not prevent the formation of the inclusions, and treatment of the conditioned medium with pronase destroyed the activity. These results demonstrate the presence of a protein that is secreted from bromodeoxyuridine-substituted Raji cells and is capable of inducing nonbromodeoxyuridine-substituted cells to form lupus inclusions. Interferon (100 units per milliliter) was found in the conditioned medium. Inclusions also formed in Raji cells grown in fresh medium supplemented with human leukocyte or fibroblast interferon (100 units per milliliter).〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rich, S A -- New York, N.Y. -- Science. 1981 Aug 14;213(4509):772-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6166984" target="_blank"〉PubMed〈/a〉
    Keywords: Bromodeoxyuridine/*metabolism ; Burkitt Lymphoma ; Cell Line ; Culture Media ; Cytoplasmic Granules/ultrastructure ; DNA Replication ; Humans ; Interferons/*biosynthesis ; Lupus Erythematosus, Systemic/*pathology
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    Diameter of the cell-to-cell junctional membrane channels as probed with neutral molecules (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-07-31
    Description: The cell-to-cell channels in the junctions of an insect salivary gland and of insect and mammalian cells in culture were probed with fluorescent molecules-neutral linear oligosaccharides, neutral branched glycopeptides, and charged linear peptides. From the molecular dimensions of the largest permeants and smallest impermeants the permeation-limiting channel diameter was obtained: 16 to 20 angstroms for the mammalian cells and 20 to 30 angstroms for the insect cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schwarzmann, G -- Wiegandt, H -- Rose, B -- Zimmerman, A -- Ben-Haim, D -- Loewenstein, W R -- CA 14464/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1981 Jul 31;213(4507):551-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7244653" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Chironomidae ; Fluorescent Dyes ; Glycopeptides/*metabolism ; Intercellular Junctions/*ultrastructure ; Mice ; Mice, Inbred BALB C ; Models, Molecular ; Oligosaccharides/*metabolism ; Protein Conformation ; Salivary Glands/*ultrastructure ; Species Specificity
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    Axonal transport: each major rate component reflects the movement of distinct macromolecular complexes (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-10-09
    Description: The proteins of the three major rate components of axonal transport in guinea pig retinal ganglion cells were analyzed by one- and two-dimensional gel electrophoresis. Each rate component consisted of a different set of proteins that remained associated with each other during transport. This suggests that each rate component represents a distinct macromolecular complex and that these complexes may be definable organelles such as microtubules, microfilaments, and smooth endoplasmic reticulum. Thus, the transport of radiolabeled proteins in the axon reflects the movement of complete subcellular rather than the movement of individual proteins.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tytell, M -- Black, M M -- Garner, J A -- Lasek, R J -- NS 05892-02/NS/NINDS NIH HHS/ -- NS 13658-03/NS/NINDS NIH HHS/ -- NS 14900-02/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1981 Oct 9;214(4517):179-81.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6169148" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Axonal Transport ; Axons/*metabolism ; Cytoskeleton/metabolism ; Electrophoresis, Polyacrylamide Gel ; Endoplasmic Reticulum/metabolism ; Guinea Pigs ; Hypoglossal Nerve/metabolism ; Microtubules/metabolism ; Nerve Tissue Proteins/*metabolism ; Retina/metabolism ; Time Factors
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    Intrinsic birefringence signal preceding the onset of contraction in heart muscle (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-08-07
    Description: An intrinsic birefringence signal with two components occurring before sarcomere shortening was measured in mammalian cardiac muscle. The second component was sensitive to the inotropic state of the muscle as affected by external calcium concentration and epinephrine but not by changes of resting length. The second component was absent in frog heart. These results suggest that the second component of the birefringence signal reflects the activity of the sarcoplasmic reticulum related to excitation-contraction coupling processes occurring prior to onset of contraction in mammalian cardiac muscle.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Weiss, R -- Morad, M -- New York, N.Y. -- Science. 1981 Aug 7;213(4508):663-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7256266" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Animals ; Birefringence ; Calcium/*physiology ; Cats ; Guinea Pigs ; Heart/*physiology ; Intracellular Membranes/physiology ; *Myocardial Contraction ; Rats ; Sarcoplasmic Reticulum/*physiology ; Time Factors
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  • 69
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    Tumor cell killing by phorbol ester--differentiated human leukemia cells (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-08-07
    Description: The tumor promoter 12-O-tetradecanoyl-phorbol-13-acetate causes differentiation of cells of the human leukemia cell line HL60 to nondividing macrophage-like cells. These differentiated cells are cytotoxic for tumor cells (including parent, untreated HL60 cells) in vitro. Agents that induce this desirable differentiation to nondividing, antitumor effector cells may be useful in the experimental treatment of leukemia.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Weinberg, J B -- 27070-02/PHS HHS/ -- New York, N.Y. -- Science. 1981 Aug 7;213(4508):655-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7196085" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Differentiation/drug effects ; Cell Line ; *Cytotoxicity, Immunologic ; Humans ; Immunity, Cellular ; Leukemia, Experimental/immunology/*pathology ; Macrophages/cytology/*immunology ; Phorbols/*pharmacology ; Tetradecanoylphorbol Acetate/*pharmacology
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  • 70
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    The hormonal control of sexual development (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-03-20
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wilson, J D -- George, F W -- Griffin, J E -- AM03892/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1981 Mar 20;211(4488):1278-84.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7010602" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anti-Mullerian Hormone ; Estradiol/metabolism/*physiology ; Female ; *Glycoproteins ; Gonadotropins/physiology ; *Growth Inhibitors ; Humans ; Male ; Morphogenesis ; Mullerian Ducts ; Ovary/embryology ; Rabbits ; Receptors, Androgen/metabolism ; *Sex Differentiation ; Testicular Hormones/*physiology ; Testis/embryology/secretion ; Testosterone/metabolism/*physiology ; Time Factors ; Urogenital System/embryology ; Wolffian Ducts
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  • 71
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    Mesenchymal cells from the human embryonic palate are highly responsive to epidermal growth factor (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-07-31
    Description: An established line of mesenchymal cells from the human embryonic palate is highly sensitive to the stimulatory effect of epidermal growth factor on growth, labeled thymidine incorporation, and ornithine decarboxylase activity. The results suggest that epidermal growth factor may play a key role in development of various human embryonic and fetal tissues.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yoneda, T -- Pratt, R M -- New York, N.Y. -- Science. 1981 Jul 31;213(4507):563-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7017936" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Division/drug effects ; Cell Line ; DNA Replication/drug effects ; Embryo, Mammalian ; Epidermal Growth Factor/*pharmacology ; Female ; Humans ; Insulin/pharmacology ; Kinetics ; Organ Specificity ; Ornithine Decarboxylase/metabolism ; Palate/drug effects/*physiology ; Peptides/*pharmacology ; Pregnancy
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  • 72
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    Metastatic potential is positively correlated with cell surface sialylation of cultured murine tumor cell lines (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-06-26
    Description: The ability of murine tumor cells to metastasize spontaneously from subcutaneous sites is positively correlated with the total sialic acid content of the cells in culture, the degree to which the sialic acid is exposed on the tumor cell surface, and, most strongly, with the degree of sialylation of galactosyl and N-acetylgalactosaminyl residues in cell surface glycoconjugates. These findings suggest that sialic acid on the cell surface may play a role in tumor cell metastasis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yogeeswaran, G -- Salk, P L -- CA19312-01/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1981 Jun 26;212(4502):1514-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7233237" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Cell Membrane/*physiology ; Cell Transformation, Neoplastic ; Cell Transformation, Viral ; Mice ; *Neoplasm Metastasis ; Neoplasms, Experimental/*physiopathology ; Sialic Acids/*analysis
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  • 73
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    Rhodamine-123 selectively reduces clonal growth of carcinoma cells in vitro (1982)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1982-12-10
    Description: Rhodamine-123, a cationic laser dye, markedly reduced the clonal growth of carcinoma cells but had little effect on nontumorigenic epithelial cells in vitro. This selective inhibitory effect of Rhodamine-123 on some carcinomas is unusual since known anticancer drugs, such as arabinosyl cytosine and methotrexate, have not been shown to exhibit such selectivity in vitro.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bernal, S D -- Lampidis, T J -- Summerhayes, I C -- Chen, L B -- New York, N.Y. -- Science. 1982 Dec 10;218(4577):1117-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7146897" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Carcinoma/*drug therapy ; Cell Line ; Cell Survival/drug effects ; Mice ; Mitochondria/metabolism ; Neoplasms, Experimental/drug therapy ; Rhodamine 123 ; Rhodamines/metabolism/therapeutic use ; Time Factors ; Urinary Bladder Neoplasms/drug therapy
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  • 74
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    Reduced leucine-enkephalin--like immunoreactive substance in hamster basal ganglia after long-term ethanol exposure (1982)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1982-06-25
    Description: Golden Syrian hamsters were placed individually in cages with three drinking bottles--one empty, one containing water, and the third containing water and ethanol. Control hamsters received water only. After 1 year the experimental hamsters showed a significantly lower concentration of leucine-enkephalin-like immunoreactive substance in the basal ganglia than the control hamsters. This finding indicates that the action of ethanol involves endogenous peptidyl opiates.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Blum, K -- Briggs, A H -- Elston, S F -- DeLallo, L -- Sheridan, P J -- Sar, M -- New York, N.Y. -- Science. 1982 Jun 25;216(4553):1425-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7089531" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Basal Ganglia/*drug effects ; Cricetinae ; Endorphins/*analysis ; Enkephalin, Leucine ; Enkephalins/*analysis/metabolism ; Ethanol/metabolism/*pharmacology ; Mesocricetus ; Time Factors
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  • 75
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    Measurement of intracellular free calcium in monkey kidney cells with aequorin (1982)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1982-07-16
    Description: A method has been developed for the measurement of intracellular free calcium in mammalian cells. The calcium-sensitive photoprotein aequorin can be incorporated into isolated cells by hypo-osmotic treatment without altering the cell viability, permeability, or metabolism. Intracellular calcium activity (Cai2+) was monitored in a perfusion system. In monkey kidney cells (LLC-MK2), Cai2+ is approximately 57 nanomoles per liter. Changes in Cai2+ with time can also be followed: exposure of the cells to anaerobiosis or the calcium ionophore A23187 reversibly increases Cai2+. The method has also been successfully tested in rat hepatocytes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Borle, A B -- Snowdowne, K W -- New York, N.Y. -- Science. 1982 Jul 16;217(4556):252-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6806904" target="_blank"〉PubMed〈/a〉
    Keywords: *Aequorin ; Anaerobiosis ; Animals ; Calcimycin/pharmacology ; Calcium/*metabolism ; Cell Line ; Kidney/drug effects/*metabolism ; Kinetics ; *Luminescent Proteins ; Macaca mulatta
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  • 76
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    Long-term synaptic potentiation in the superior cervical ganglion (1982)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1982-03-12
    Description: Brief tetanic stimulation of the preganglionic nerves to the superior cervical ganglion enhances the postganglionic response to single preganglionic stimuli for 1 to 3 hours. This long-term potentiation of transmission through the ganglion is apparently not attributable to a persistent muscarinic action of the preganglionic neurotransmitter, acetylcholine, since neither the magnitude nor the time course of the phenomenon is reduced by atropine. The decay of long-term potentiation can be described by a first-order kinetic process with a mean time constant of 80 minutes. We conclude that long-term potentiation, once considered a unique property of the hippocampus, is in fact a more general feature of synaptic function. This form of synaptic memory may significantly influence information processing and control in other regions of the nervous system, including autonomic ganglia.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brown, T H -- McAfee, D A -- 12116/PHS HHS/ -- NS 16576/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1982 Mar 12;215(4538):1411-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6278593" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Ganglia, Sympathetic/*physiology ; Kinetics ; Learning/*physiology ; Neuronal Plasticity ; Rats ; Synapses/*physiology ; *Synaptic Transmission ; Time Factors
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  • 77
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    Evidence for the clonal origin of spontaneous metastases (1982)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1982-07-23
    Description: A cultured cell line of the K-1735 melanoma was x-irradiated to induce chromosome breakage and rearrangements and then was implanted into the footpads of syngenic C3H mice. Spontaneous lung metastases were isolated from different animals, established in culture as individual lines, and then karyotyped. Within certain metastases, the same chromosomal abnormality (or abnormalities) (recombinant chromosomes) was found in all the cells examined. Most metastases differed from one another in that they exhibited characteristic combinations of chromosomal markers. These findings indicated that the metastases were clonal and that they probably originated from different progenitor cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Talmadge, J E -- Wolman, S R -- Fidler, I J -- N01-CO-75380/CO/NCI NIH HHS/ -- New York, N.Y. -- Science. 1982 Jul 23;217(4557):361-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6953592" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Chromosome Aberrations ; Genetic Markers ; Karyotyping ; Lung Neoplasms/secondary ; Melanoma ; Mice ; Mice, Inbred C3H ; Neoplasm Metastasis/*pathology ; Neoplasms, Experimental/pathology
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  • 78
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    Breast-feeding patterns in low-income countries (1982)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1982-12-10
    Description: Breast-feeding is important to infant nutrition, morbidity, and mortality, and to postpartum amenorrhea (hence to birth intervals). Evidence on breast-feeding patterns in low-income countries from nationally representative World Fertility Surveys and secondary sources shows that in all but a few such countries most children are breast-fed for at least a few months. The limited evidence available on trends seems to indicate a decline in the duration of breast-feeding, but in most of Asia and Africa breast-feeding is almost universal during at least the first 6 months. Earlier weaning is common in Latin America.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Popkin, B M -- Bilsborrow, R E -- Akin, J S -- New York, N.Y. -- Science. 1982 Dec 10;218(4577):1088-93.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7146896" target="_blank"〉PubMed〈/a〉
    Keywords: Africa ; Asia ; *Breast Feeding ; *Developing Countries ; Female ; Humans ; Rural Population ; South America ; Time Factors ; Urban Population
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  • 79
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    Manipulation of event-related potential manifestations of information processing stages (1982)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1982-11-26
    Description: The timing of two event-related potential components was differentially affected by two experimental variables. The earlier component (NA) was affected by degradation of the stimuli and the later component (N2) by the nature of a classification task. The results support the hypothesis that NA and N2 reflect sequential stages of information processing, namely, pattern recognition and stimulus classification.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ritter, W -- Simson, R -- Vaughan, H G Jr -- Macht, M -- HD 10804/HD/NICHD NIH HHS/ -- IF32 AGO-5193/AG/NIA NIH HHS/ -- MH 06723/MH/NIMH NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1982 Nov 26;218(4575):909-11.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7134983" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Adult ; Brain/*physiology ; Brain Mapping ; Cognition/*physiology ; Discrimination (Psychology)/physiology ; Evoked Potentials ; Humans ; Information Theory ; Perception/*physiology ; Time Factors
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  • 80
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    Human fetal movement: spontaneous oscillations near one cycle per minute (1982)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1982-12-24
    Description: Spectral analysis of spontaneous fluctuations in human fetal movement revealed strong oscillations at frequencies between 0.24 and 0.90 cycle per minute, which are much higher than those of the cyclic alternation of quiet and active states in the fetus and neonate. Oscillations at frequencies up to 2.88 cycles per minute were also detected, but they were usually much weaker. The prominent peaks in the fetal movement spectra are in the frequency range of recently reported neonatal motor rhythms, and indicate the existence of a cyclic process controlling spontaneous motor output that oscillates near one cycle per minute and begins to function in utero.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Robertson, S S -- Dierker, L J -- Sorokin, Y -- Rosen, M G -- M01RR00210/RR/NCRR NIH HHS/ -- P50HD11089/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1982 Dec 24;218(4579):1327-30.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7146916" target="_blank"〉PubMed〈/a〉
    Keywords: Female ; Fetus/*physiology ; Humans ; *Movement ; Pregnancy ; Pregnancy Trimester, Third ; Spectrum Analysis/methods ; Time Factors
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  • 81
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    Transformation of human leukocytes by cocultivation with an adult T cell leukemia virus producer cell line (1982)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1982-08-20
    Description: The transmission of adult T cell leukemia virus, a human retrovirus, into fresh leukocytes from normal humans was examined. One of three virus-carrying cell lines, tested after being subjected to lethal x-irradiation, consistently transformed leukocytes from adult peripheral blood and umbilical cord blood. All the transformed cell lines expressed adult T cell leukemia virus-associated antigen, but transformed lines originating from adult and umbilical cord blood exhibited T cell and non-T, non-B cell surface natures, respectively. Efforts to transform human leukocytes with cell-free virus were unsuccessful.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yamamoto, N -- Okada, M -- Koyanagi, Y -- Kannagi, M -- Hinuma, Y -- New York, N.Y. -- Science. 1982 Aug 20;217(4561):737-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6980467" target="_blank"〉PubMed〈/a〉
    Keywords: Antigens, Surface/immunology ; Antigens, Viral/immunology ; B-Lymphocytes/immunology ; Cell Line ; Fetal Blood ; Genes, Viral ; Humans ; Karyotyping ; Leukocytes/*physiology ; Retroviridae/*genetics ; T-Lymphocytes/immunology ; *Transformation, Genetic
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  • 82
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    Memory retrieval: a time-locked process in infancy (1983)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1983-12-23
    Description: Three-month-old infants learned to activate an overhead crib mobile by operant footkicking and received a visual reminder of the event (a "reactivation treatment") 2 weeks later, after forgetting had occurred. Subsequent manifestation of the association was a monotonic increasing function of time since the reactivation treatment, and performance of infants tested 8 hours after the remainder was related to the time spent sleeping in the interim (r = 0.75). These data demonstrate that normal retrieval is time-dependent. Moreover, individual data suggest that retrieval may be continuous rather than discontinuous.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fagen, J W -- Rovee-Collier, C -- MH 32307/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1983 Dec 23;222(4630):1349-51.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6658456" target="_blank"〉PubMed〈/a〉
    Keywords: Humans ; Infant ; *Memory ; Time Factors
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  • 83
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    High efficiency DNA-mediated transformation of primate cells (1983)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1983-08-05
    Description: Tissue culture cells from several mammalian species, including three primate lines, were transfected with recombinant vectors carrying Escherichia coli xanthine-guanine phosphoribosyltransferase or Tn5 aminoglycoside phosphotransferase dominant selectable markers. Human HeLa and SV40-transformed xeroderma pigmentosum cells exhibited stable transformation frequencies of at least 10(-3) (0.1 percent). CV-1, an African green monkey kidney cell line, could be stably transformed with the exceptionally high frequency of 6 X 10(-2) (6 percent).〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gorman, C -- Padmanabhan, R -- Howard, B H -- New York, N.Y. -- Science. 1983 Aug 5;221(4610):551-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6306768" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Avian Sarcoma Viruses/genetics ; Cell Line ; Cercopithecus aethiops ; Cricetinae ; Cricetulus ; DNA, Recombinant/*metabolism ; Genetic Vectors ; HeLa Cells/metabolism ; Humans ; Mice ; Plasmids ; *Transfection
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  • 84
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    Expression of a cellular oncogene during liver regeneration (1983)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1983-02-04
    Description: The number of transcripts of the cellular oncogene ras, which is homologous to the transforming gene of Harvey sarcoma virus, increases during liver regeneration in rats. The increase in these transcripts in liver polysomal polyadenylated RNA occurs at the time of activation of DNA synthesis during the regenerative process induced by partial hepatectomy or carbon tetrachloride injury. The number of ras transcripts returns to basal levels within 72 hours. These observations show that transcription of a cellular oncogene increases in a regulated way in a nonneoplastic growth process.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Goyette, M -- Petropoulos, C J -- Shank, P R -- Fausto, N -- New York, N.Y. -- Science. 1983 Feb 4;219(4584):510-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6297003" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Carbon Tetrachloride Poisoning ; DNA/biosynthesis ; Hepatectomy ; *Liver Regeneration ; Nucleic Acid Hybridization ; *Oncogenes ; RNA, Messenger/biosynthesis ; Rats ; Sarcoma Viruses, Murine/genetics ; Time Factors ; *Transcription, Genetic
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  • 85
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    Hand preference across time is related to intelligence in young girls, not boys (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-09-09
    Description: Consistency of hand preference was examined in a longitudinal study of children between 18 and 42 months of age. Results showed a sex-specific relationship between hand consistency and intellectual development. Across a variety of intellectual abilities at all ages, females with consistency of handedness were precocious compared to females without such consistency. This relationship did not hold for males.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gottfried, A W -- Bathurst, K -- New York, N.Y. -- Science. 1983 Sep 9;221(4615):1074-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6879205" target="_blank"〉PubMed〈/a〉
    Keywords: Child, Preschool ; Female ; *Functional Laterality ; Humans ; Infant ; *Intelligence ; Intelligence Tests ; Male ; Sex Factors ; Time Factors
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  • 86
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    Synthesis of kappa light chains by cell lines containing an 8;22 chromosomal translocation derived from a male homosexual with Burkitt's lymphoma (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-12-09
    Description: Three cell lines were derived from a homosexual patient with probable acquired immunodeficiency syndrome and Burkitt's lymphoma. The cell lines produce an unusual strain of Epstein-Barr virus which will both transform cord blood lymphocytes and induce early antigens in Raji cells. Translocations between chromosomes 8 and 22 have occurred in all three lines, but the cells synthesize immunoglobulin M with light chains of the kappa type, in contrast to the usual concordance between a translocation involving chromosome 22 and lambda chain synthesis. Both kappa genes and one lambda gene are rearranged. These findings indicate either that translocation may occur as a separate event from immunoglobulin gene rearrangement or that the proposed hierarchical sequence of immunoglobulin gene rearrangements is not always adhered to. The data also imply that in cells containing a translocation between the long arm of chromosome 8 and a chromosome bearing an immunoglobulin gene, alteration of cellular myc expression may occur regardless of the immunoglobulin gene that is expressed.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Magrath, I -- Erikson, J -- Whang-Peng, J -- Sieverts, H -- Armstrong, G -- Benjamin, D -- Triche, T -- Alabaster, O -- Croce, C M -- New York, N.Y. -- Science. 1983 Dec 9;222(4628):1094-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6316501" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/complications ; Antigens, Viral/analysis ; Burkitt Lymphoma/complications/*genetics ; Cell Line ; Chromosomes, Human, 21-22 and Y ; Chromosomes, Human, 6-12 and X ; Epstein-Barr Virus Nuclear Antigens ; Herpesvirus 4, Human/analysis ; Homosexuality ; Humans ; Immunoglobulin Light Chains/*biosynthesis ; Immunoglobulin kappa-Chains/*biosynthesis ; Male ; Oncogenes
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 87
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    Red/Green color opponency at detection threshold (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-01-14
    Description: By means of visual stimnulus without temporal or spatial edges, we have achieved better isolation of chromatic signals at detection threshold than has been reported previously. Under various states of adaptation, the spectral sensitivity of the chromatic mechanism detecting middle- and long-wavelength lights corresponds with that deduced from suprathreshold red/green hue equilibriums.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Thornton, J E -- Pugh, E N Jr -- New York, N.Y. -- Science. 1983 Jan 14;219(4581):191-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6849131" target="_blank"〉PubMed〈/a〉
    Keywords: Color Perception/*physiology ; Humans ; Spectrum Analysis ; Time Factors
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  • 88
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    Human endothelial cells: use of heparin in cloning and long-term serial cultivation (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-11-11
    Description: Endothelial cells from human blood vessels were cultured in vitro, with doubling times of 17 to 21 hours for 42 to 79 population doublings. Cloned human endothelial cell strains were established for the first time and had similar proliferative capacities. This vigorous cell growth was achieved by addition of heparin to culture medium containing reduced concentrations of endothelial cell growth factor. The routine cloning and long-term culture of human endothelial cells will facilitate studying the human endothelium in vitro.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Thornton, S C -- Mueller, S N -- Levine, E M -- AG-00839/AG/NIA NIH HHS/ -- T32-CA-09171/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1983 Nov 11;222(4624):623-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6635659" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Division/drug effects ; Cells, Cultured ; Clone Cells/enzymology ; Endothelium/*cytology ; Growth Substances/pharmacology ; Heparin/*pharmacology ; Humans ; Time Factors
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  • 89
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    Recovery of normal topography in the somatosensory cortex of monkeys after nerve crush and regeneration (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-08-19
    Description: After median nerve fibers to glabrous skin on the hands of monkeys were crushed and allowed to regenerate, normal topographical organization was recovered in the representation of the hand in primary somatosensory cortex. Similar recovery of normal cortical organization may underlie the sensory restoration that usually follows nerve crush injury in humans.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wall, J T -- Felleman, D J -- Kaas, J H -- New York, N.Y. -- Science. 1983 Aug 19;221(4612):771-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6879175" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Aotus trivirgatus/physiology ; Brain Mapping ; Hand/innervation ; *Nerve Crush ; *Nerve Regeneration ; Somatosensory Cortex/*physiology ; Time Factors
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  • 90
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    DNA methylation decreases in aging but not in immortal cells (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-06-03
    Description: When normal diploid fibroblasts from mice, hamsters, and humans were grown in culture, the 5-methylcytosine content of their DNA's markedly decreased. The greatest rate of loss of 5-methylcytosine residues was observed in mouse cells, which survived the least number of division. Immortal mouse cell lines had more stable rates of methylation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wilson, V L -- Jones, P A -- 1-T32-CA09320/CA/NCI NIH HHS/ -- R01-GM30892/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1983 Jun 3;220(4601):1055-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6844925" target="_blank"〉PubMed〈/a〉
    Keywords: 5-Methylcytosine ; *Aging ; Animals ; Cell Division ; Cell Line ; Cricetinae ; Cytosine/analogs & derivatives/metabolism ; DNA/metabolism/*physiology ; Fibroblasts/metabolism ; Humans ; Mesocricetus ; Methylation ; Mice ; Time Factors
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  • 91
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    Bacterial contamination of human tumor samples (1984)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1984-08-17
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉New York, N.Y. -- Science. 1984 Aug 17;225(4663):670-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6087452" target="_blank"〉PubMed〈/a〉
    Keywords: Carcinoma, Hepatocellular/genetics ; Cell Line ; DNA, Bacterial ; *DNA, Neoplasm ; DNA, Viral ; Hepatitis B virus/genetics ; Humans ; Liver Neoplasms/genetics ; Oncogenes
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  • 92
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    Criteria for evidence of chemical carcinogenicity. Interdisciplinary Panel on Carcinogenicity (1984)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1984-08-17
    Description: The Interdisciplinary Panel on Carcinogenicity reviewed and reevaluated criteria for assessing evidence of carcinogenicity of chemical substances. The panel reviewed criteria applicable to data derived from human epidemiological studies and from both in vivo and in vitro laboratory studies. A critical appraisal of all these sources of information led to the conclusion that the characterization of human risk always requires interdisciplinary evaluation of the entire array of data on a case-by-case basis. Animal studies, whenever possible, should be augmented by studies of mechanisms, metabolism, and pharmacodynamics. Such studies may assist in assessing risk to man. Recognizing the utility of such data should point the way for better assessment in the future.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉New York, N.Y. -- Science. 1984 Aug 17;225(4663):682-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6463646" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Assay ; *Carcinogens/metabolism/pharmacology ; Carcinogens, Environmental ; Cell Transformation, Neoplastic ; Dose-Response Relationship, Drug ; Environmental Exposure ; Epidemiologic Methods ; Humans ; In Vitro Techniques ; Mixed Function Oxygenases/metabolism ; Mutagenicity Tests ; Neoplasms/chemically induced ; Risk ; Time Factors ; United States
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  • 93
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    Biotechnology as an intellectual property (1984)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1984-04-27
    Description: Recent advances in biotechnology have created many public policy and legal issues, one of the most significant of which is the treatment of biotechnological industrial products, particularly under the patent system. Patents represent one of several types of intellectual property; their ownership confers the right to exclude others from benefitting from the tangible products of a proprietary subject matter. Intellectual property law and its protections will play a major role in the rate at which biotechnology develops in the United States. In this article biotechnological intellectual property issues are reviewed in the context of their underlying legal requirements. The implications of other factors, such as international competition, research funding, and gene ownership, are also considered.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Adler, R G -- New York, N.Y. -- Science. 1984 Apr 27;224(4647):357-63.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6584975" target="_blank"〉PubMed〈/a〉
    Keywords: *Biomedical Research ; Cell Line ; Copyright ; DNA, Recombinant ; Economic Competition ; Federal Government ; *Genetic Engineering ; *Genetics, Microbial ; Government Regulation ; Legislation as Topic ; Ownership ; *Patents as Topic ; Research ; *Technology ; United States ; as a question of intellectual property rights. Attention is focused on the major ; role played by the U.S. patent system in establishing such rights, as illustrated ; by the case of products of recombinant DNA research. Trade secret, copyright, and ; trademark protections are also considered, as are policy issues such as ; international competition in the development of biomedical technologies and ; financing arrangements.
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  • 94
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    Heterochronic mutants of the nematode Caenorhabditis elegans (1984)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1984-10-26
    Description: Mutations in the Caenorhabditis elegans genes lin-14, lin-28, and lin-29 cause heterochronic developmental defects: the timing of specific developmental events in several tissues is altered relative to the timing of events in other tissues. These defects result from temporal transformations in the fates of specific cells, that is, certain cells express fates normally expressed by cells generated at other developmental stages. The identification and characterization of genes that can be mutated to cause heterochrony support the proposal that heterochrony is a mechanism for phylogenetic change and suggest cellular and genetic bases for heterochronic variation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ambros, V -- Horvitz, H R -- GM24663/GM/NIGMS NIH HHS/ -- GM24943/GM/NIGMS NIH HHS/ -- HD00369/HD/NICHD NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1984 Oct 26;226(4673):409-16.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6494891" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Caenorhabditis/*genetics ; Female ; *Genes ; Genetic Variation ; Male ; *Mutation ; *Phylogeny ; Time Factors
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  • 95
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    Stress hormones: their interaction and regulation (1984)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1984-05-04
    Description: Stress stimulates several adaptive hormonal responses. Prominent among these responses are the secretion of catecholamines from the adrenal medulla, corticosteroids from the adrenal cortex, and adrenocorticotropin from the anterior pituitary. A number of complex interactions are involved in the regulation of these hormones. Glucocorticoids regulate catecholamine biosynthesis in the adrenal medulla and catecholamines stimulate adrenocorticotropin release from the anterior pituitary. In addition, other hormones, including corticotropin-releasing factor, vasoactive intestinal peptide, and arginine vasopressin stimulate while the corticosteroids and somatostatin inhibit adrenocorticotropin secretion. Together these agents appear to determine the complex physiologic responses to a variety of stressors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Axelrod, J -- Reisine, T D -- New York, N.Y. -- Science. 1984 May 4;224(4648):452-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6143403" target="_blank"〉PubMed〈/a〉
    Keywords: Adenylyl Cyclases/metabolism ; Adrenal Cortex/metabolism ; Adrenal Medulla/metabolism ; Adrenocorticotropic Hormone/*metabolism ; Animals ; Brain/metabolism ; Catecholamines/*metabolism ; Cell Line ; Corticotropin-Releasing Hormone/metabolism ; Cyclic AMP/metabolism ; Glucocorticoids/*metabolism ; Humans ; Phospholipases A/metabolism ; Pituitary Gland, Anterior/metabolism ; Receptors, Adrenergic, alpha/metabolism ; Receptors, Adrenergic, beta/metabolism ; Receptors, Cell Surface/metabolism ; Receptors, Corticotropin-Releasing Hormone ; Receptors, Somatostatin ; Somatostatin/pharmacology ; Stress, Physiological/*metabolism ; Stress, Psychological/metabolism ; Sympathetic Nervous System/metabolism ; Vasoactive Intestinal Peptide/pharmacology ; Vasopressins/pharmacology
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  • 96
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    Regulation of a hybrid gene by glucose and temperature in hamster fibroblasts (1984)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1984-10-12
    Description: A novel eukaryotic hybrid gene has been constructed from the 5' sequence of a rat gene and the bacterial neomycin-resistance gene. After transfection into hamster fibroblasts, the neo transcripts can be induced to high levels by the absence of glucose. Furthermore, this hybrid gene can be regulated by temperature when it is introduced into a temperature-sensitive mutant cell line.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Attenello, J W -- Lee, A S -- CA-27607/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1984 Oct 12;226(4671):187-90.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6484570" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Cricetinae ; DNA, Recombinant ; Drug Resistance, Microbial ; Fibroblasts ; *Gene Expression Regulation ; Genes, Bacterial ; *Genes, Regulator ; Glucose/*pharmacology ; *HSP70 Heat-Shock Proteins ; Membrane Proteins/biosynthesis/*genetics ; Mutation ; Neomycin/pharmacology ; Rats ; Temperature ; Transcription, Genetic ; Transfection
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  • 97
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    T-cell growth factor gene: lack of expression in human T-cell leukemia-lymphoma virus-infected cells (1984)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1984-03-09
    Description: Activated mature T cells require T-cell growth factor (TCGF) for continuous proliferation. However, many mature T cells infected with human T-cell leukemia-lymphoma virus grow independently of exogenously added TCGF. It is now reported that cells infected with this virus also lack detectable TCGF messenger RNA (less than one copy per cell) and thus do not produce their own growth factor. The results apparently rule out an autostimulation mechanism of growth control.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Arya, S K -- Wong-Staal, F -- Gallo, R C -- New York, N.Y. -- Science. 1984 Mar 9;223(4640):1086-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6320374" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Line ; Deltaretrovirus/*physiology ; *Gene Expression Regulation/drug effects ; Humans ; Interferon-gamma/genetics ; Interleukin-2/*genetics ; Phytohemagglutinins/pharmacology ; RNA, Messenger/*genetics ; T-Lymphocytes/metabolism/*microbiology ; Tetradecanoylphorbol Acetate/pharmacology
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  • 98
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    Temporal selectivity in the central auditory system of the leopard frog (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-03-04
    Description: Amplitude modulation is a predominant temporal feature in many vocal signals. The leopard frog, Rana pipiens, has a class of neurons in the central auditory system that respond selectively to particular rates of amplitude modulation; these neurons can be characterized by a temporal tuning curve. Such selectivity is absent in the peripheral auditory system. This type of transformation may be fundamental in processing temporal information in the vertebrate sensory nervous system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rose, G -- Capranica, R R -- NS-09244/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1983 Mar 4;219(4588):1087-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6600522" target="_blank"〉PubMed〈/a〉
    Keywords: Animal Communication ; Animals ; Auditory Pathways/*physiology ; Auditory Perception/*physiology ; Brain/physiology ; Rana pipiens/*physiology ; Time Factors
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  • 99
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    Identification of DNA sequence responsible for 5-bromodeoxyuridine-induced gene amplification (1984)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1984-08-31
    Description: Bromodeoxyuridine (BrdUrd) treatment of the prolactin nonproducing subclone of GH cells (rat pituitary tumor cells) induces amplification of a 20-kilobase DNA fragment including all of the prolactin gene coding sequences. This amplified DNA segment, which is flanked by two unamplified regions, thus designates a unit of BrdUrd-induced amplified sequence. Cloned DNA segments, 10.3 kilobases long, from the 5' end of the rat prolactin gene of BrdUrd-responsive and -nonresponsive cells, were ligated to the thymidine kinase gene of herpes simplex virus type 1 (HSV1TK), and the hybrid DNA was transferred to thymidine kinase-deficient mouse fibroblast cells by transfection. The HSV1TK gene and the rat prolactin gene were amplified together in drug-treated transfectants carrying the hybrid DNA HSV1TK gene and rat prolactin gene of BrdUrd-responsive GH cells. These results suggest that the 10.3-kilobase DNA segment at the 5' end of the rat prolactin gene of BrdUrd-responsive GH cells carries the information for drug-induced gene amplification (amplicon) and that another gene, such as the HSV1TK gene, is also amplified when the latter is placed adjacent to this segment.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Biswas, D K -- Hartigan, J A -- Pichler, M H -- CA28218/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1984 Aug 31;225(4665):941-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6089335" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Bromodeoxyuridine/*pharmacology ; Cell Line ; Cloning, Molecular ; DNA/*genetics ; DNA, Recombinant ; *Gene Amplification ; Genes, Viral ; Mice ; Prolactin/genetics ; Rats ; Simplexvirus/genetics ; Thymidine Kinase/genetics ; Transfection
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  • 100
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    Insulin receptor: evidence that it is a protein kinase (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-01-21
    Description: Highly purified preparations of insulin receptor catalyzed the phosphorylation of the 95,000-dalton subunit of the insulin receptor. This subunit of the insulin receptor was also labeled with [alpha-32P]8-azidoadenosine 5'-triphosphate, a photoaffinity label for adenosine triphosphate binding sites. The identity of the 95,000-dalton band was confirmed in both cases by precipitation with a monoclonal antibody to the insulin receptor. These results suggest that the insulin receptor is itself a protein kinase.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Roth, R A -- Cassell, D J -- New York, N.Y. -- Science. 1983 Jan 21;219(4582):299-301.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6849137" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphate/metabolism ; Cell Line ; Cells, Cultured ; Lymphocytes ; Molecular Weight ; Phosphoproteins/physiology ; Protein Kinases/*physiology ; Receptor, Insulin/*physiology
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