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  • Articles  (24)
  • Time Factors  (24)
  • American Association for the Advancement of Science (AAAS)  (24)
  • American Geophysical Union
  • American Meteorological Society
  • American Physical Society (APS)
  • 2010-2014
  • 1995-1999
  • 1985-1989
  • 1980-1984  (24)
  • 1960-1964
  • 1935-1939
  • 1930-1934
  • 1983  (24)
  • Natural Sciences in General  (24)
  • Geosciences
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  • Articles  (24)
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  • American Association for the Advancement of Science (AAAS)  (24)
  • American Geophysical Union
  • American Meteorological Society
  • American Physical Society (APS)
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  • 2010-2014
  • 1995-1999
  • 1985-1989
  • 1980-1984  (24)
  • 1960-1964
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  • 1
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    Memory retrieval: a time-locked process in infancy (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    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
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Expression of a cellular oncogene during liver regeneration (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    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
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    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
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
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    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
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 5
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    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
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 6
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    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
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 7
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    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
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 8
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    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
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 9
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    Effects of tyrosine administration on serum biopterin in normal controls and patients with Parkinson's disease (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-01-07
    Description: After administration of tyrosine, total concentration of biopterin, the cofactor for tyrosine hydroxylase, was increased in the striatum, adrenal glands, and serum of rats, and in the serum of humans. Serum biopterin is lower in patients with Parkinson's disease than in normal controls. After oral administration of tyrosine, the increase in serum biopterin concentration was smaller in patients with Parkinson's disease (less than twofold) than in healthy controls (three-to sevenfold). These results suggest that tyrosine may have a regulatory role in biopterin biosynthesis and that patients with Parkinson's disease may have some abnormality in the regulation of biopterin biosynthesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yamaguchi, T -- Nagatsu, T -- Sugimoto, T -- Matsuura, S -- Kondo, T -- Iizuka, R -- Narabayashi, H -- New York, N.Y. -- Science. 1983 Jan 7;219(4580):75-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6849120" target="_blank"〉PubMed〈/a〉
    Keywords: Administration, Oral ; Adrenal Glands/metabolism ; Alanine/pharmacology ; Animals ; Biopterin/*blood ; Corpus Striatum/metabolism ; Humans ; Injections, Intraperitoneal ; Liver/metabolism ; Male ; Parkinson Disease/*blood ; Pteridines/*blood ; Rats ; Rats, Inbred Strains ; Time Factors ; Tyrosine/administration & dosage/*pharmacology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 10
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    Ethanol modulation of opiate receptors in cultured neural cells (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-12-16
    Description: The mouse neuroblastoma-rat glioma hybrid cell line NG108-15 was used to study the acute and chronic interaction of ethanol with intact neural cells. In the short term, ethanol inhibited opiate receptor binding, but after long-term exposure the cells exhibited an apparent adaptive increase in the number of opiate binding sites; this was reversible when ethanol was withdrawn. High concentrations of ethanol (200 mM) increased opiate binding after 18 to 24 hours, whereas lower concentrations (25 to 50 mM) produced similar changes after 2 weeks. This model system has potential for exploring the cellular and molecular mechanisms underlying ethanol intoxication, tolerance, and withdrawal.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Charness, M E -- Gordon, A S -- Diamond, I -- New York, N.Y. -- Science. 1983 Dec 16;222(4629):1246-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6316506" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Dose-Response Relationship, Drug ; Enkephalin, Methionine/analogs & derivatives/metabolism ; Ethanol/*pharmacology ; Glioma ; Hybrid Cells ; Mice ; Neuroblastoma ; Neurons/*drug effects/metabolism ; Rats ; Receptors, Opioid/*drug effects/metabolism ; Time Factors
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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