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  • Time Factors
  • American Association for the Advancement of Science (AAAS)  (42)
  • Nature Publishing Group
  • 1985-1989  (18)
  • 1980-1984  (24)
  • 1985  (18)
  • 1983  (24)
Collection
Keywords
Publisher
  • American Association for the Advancement of Science (AAAS)  (42)
  • Nature Publishing Group
Years
  • 1985-1989  (18)
  • 1980-1984  (24)
Year
  • 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
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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
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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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
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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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
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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
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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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
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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
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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
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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
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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
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  • 11
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    Taste flashes: reaction times, intensity, and quality (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-01-28
    Description: Human simple reaction times and magnitude estimates of taste intensity increased as the duration of 500-millimolar sodium chloride or 2-millimolar saccharin sodium pulses lengthened from 100 to 1000 milliseconds. Responses to "What was the taste?" ranged from 94 to 100 percent "sweet" for saccharin and 68 to 83 percent "salty" for salt across all pulse durations when both substances were randomized with water pulses.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kelling, S T -- Halpern, B P -- New York, N.Y. -- Science. 1983 Jan 28;219(4583):412-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6849142" target="_blank"〉PubMed〈/a〉
    Keywords: Humans ; Saccharin ; Sodium Chloride ; Taste/*physiology ; Time Factors
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  • 12
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    Immune response to hepatitis B surface antigen: enhancement by prior injection of antibodies to the idiotype (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-08-26
    Description: Anti-idiotype reagents that recognize a common idiotype associated with the combining site of antibodies to hepatitis B surface antigen (anti-HBs) were used to manipulate the immune response to hepatitis B surface antigen in BALB/c mice. The injection of antibodies to the idiotype before antigenic stimulation resulted in an increase in the number of cells secreting immunoglobulin M antibodies to hepatitis B surface antigen. Anti-HBs-secreting cells were also induced by administration of antibodies to the idiotype without subsequent antigen exposure. These findings indicate that the immune response to hepatitis B surface antigen in mice is regulated through an idiotype-anti-idiotype network.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kennedy, R C -- Adler-Storthz, K -- Henkel, R D -- Sanchez, Y -- Melnick, J L -- Dreesman, G R -- New York, N.Y. -- Science. 1983 Aug 26;221(4613):853-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6603657" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Anti-Idiotypic/immunology ; Antibodies, Viral/*biosynthesis ; Hepatitis B Antibodies/*biosynthesis ; Hepatitis B Surface Antigens/*immunology ; Immunoglobulin G/biosynthesis ; Immunoglobulin Idiotypes/immunology ; Immunoglobulin M/biosynthesis ; Mice ; Spleen/immunology ; Time Factors
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  • 13
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    Vaginal stimulation: an important determinant of maternal bonding in sheep (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-01-07
    Description: The immediate induction of the full complement of maternal behavior in nonpregnant ewes primed with estrogen and progesterone has been obtained after 5 minutes of vaginal-cervical stimulation. A similar period of such stimulation given to recently parturient ewes, after the development of selective bonding to their own lambs, reversed their rejection behavior of alien lambs and produced a state of plasticity in maternal behavior, such that ewes receiving vaginal stimulation would accept and adopt alien lambs. These findings implicate vaginal-cervical stimulation as playing a role in the onset of maternal behavior.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Keverne, E B -- Levy, F -- Poindron, P -- Lindsay, D R -- New York, N.Y. -- Science. 1983 Jan 7;219(4580):81-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6849123" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Estradiol/pharmacology ; Female ; *Maternal Behavior ; Pregnancy ; Progesterone/pharmacology ; Sheep/*physiology ; Time Factors ; Vagina/*physiology
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  • 14
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    Pregnancy increases reactivity of mice to phenobarbital (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-04-29
    Description: Compared to nonpregnant controls, pregnant mice injected with phenobarbital had lower concentrations of the drug in the plasma but equivalent concentrations in the brain. In spite of the similar concentrations in the brain, the behavioral response to phenobarbital was greater for pregnant than nonpregnant mice. These results suggest that the concentration of phenobarbital in the plasma, which is commonly used as a basis for adjusting phenobarbital dosage during pregnancy, is not an appropriate indicator of the dynamics of the drug.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Middaugh, L D -- Zemp, J W -- Boggan, W O -- AA03532/AA/NIAAA NIH HHS/ -- DA00041/DA/NIDA NIH HHS/ -- DA01750/DA/NIDA NIH HHS/ -- New York, N.Y. -- Science. 1983 Apr 29;220(4596):534-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6836299" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain Chemistry ; Dose-Response Relationship, Drug ; Female ; Humans ; Mice ; Mice, Inbred C57BL ; Motor Activity/drug effects ; Phenobarbital/analysis/*metabolism/pharmacology ; *Pregnancy/drug effects ; Time Factors
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  • 15
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    Transported proteins in the regenerating optic nerve: regulation by interactions with the optic tectum (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-10-14
    Description: The transport of specific proteins in regenerating optic fibers of goldfish depends on the presence or absence of the optic tectum. When optic fibers were allowed to contact the tectum, amounts of rapidly transported proteins having molecular weights between 120,000 and 160,000 increased, and a species of molecular weight 26,000 reverted to normal levels. When nerves were prevented from contacting the tectum, the amount of the 26,000-molecular weight protein remained high for months. Amounts of other transported proteins, in particular a group of acidic components of molecular weight 44,000 to 49,000 that increase greatly at early stages of regeneration, proved to be independent of the tectum.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Benowitz, L I -- Yoon, M G -- Lewis, E R -- R01NS16943/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1983 Oct 14;222(4620):185-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6194562" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Axonal Transport ; Biological Transport ; Cell Communication ; Goldfish ; Isoelectric Point ; Molecular Weight ; *Nerve Regeneration ; Nerve Tissue Proteins/*metabolism ; Superior Colliculi/*physiology ; Time Factors ; Visual Pathways/*physiology
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  • 16
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    Clot-selective coronary thrombolysis with tissue-type plasminogen activator (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-06-10
    Description: Coronary thrombolysis, an intervention that can abort the sequelae of acute myocardial infarction, was accomplished within 10 minutes in dogs by intravenous administration of clot-selective, tissue-type plasminogen activator. In addition to inducing clot lysis, this promising fibrinolytic agent restored intermediary metabolism and nutritional myocardial blood flow, detectable noninvasively with positron tomography, without inducing a systemic fibrinolytic state.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bergmann, S R -- Fox, K A -- Ter-Pogossian, M M -- Sobel, B E -- Collen, D -- HL 17646/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1983 Jun 10;220(4602):1181-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6602378" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Coronary Disease/*drug therapy/radionuclide imaging ; Dogs ; Fibrinogen/analysis ; Infusions, Parenteral ; Injections ; Plasminogen Activators/administration & dosage/*therapeutic use ; Streptokinase/administration & dosage/therapeutic use ; Time Factors ; Tomography, Emission-Computed
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  • 17
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    Failure to integrate information from successive fixations (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-10-14
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jonides, J -- Irwin, D E -- Yantis, S -- New York, N.Y. -- Science. 1983 Oct 14;222(4620):188.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6623072" target="_blank"〉PubMed〈/a〉
    Keywords: Humans ; Research Design ; Time Factors ; Visual Perception/*physiology
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  • 18
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    Infants' discrimination of the duration of a rapid spectrum change in nonspeech signals (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-10-14
    Description: Two-month-old infants discriminated complex sinusoidal patterns that varied in the duration of their initial frequency transitions. Discrimination of these nonspeech sinusoidal patterns was a function of both the duration of the transitions and the total duration of the stimulus pattern. This contextual effect was observed even though the information specifying stimulus duration occurred after the transitional information. These findings parallel those observed with infants for perception of synthetic speech stimuli. Specialized speech processing capacities are thus not required to account for infants' sensitivity to contextual effects in acoustic signals, whether speech or nonspeech.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jusczyk, P W -- Pisoni, D B -- Reed, M A -- Fernald, A -- Myers, M -- HD-11915/HD/NICHD NIH HHS/ -- HD-15795-02/HD/NICHD NIH HHS/ -- MH-24027/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1983 Oct 14;222(4620):175-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6623067" target="_blank"〉PubMed〈/a〉
    Keywords: Humans ; *Infant ; Speech Perception/*physiology ; Time Factors
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  • 19
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    Rate of synaptic replacement in denervated rat hippocampus declines precipitously from the juvenile period to adulthood (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-08-05
    Description: Synaptic contacts per unit area in the rat dentate gyrus reach adult numbers by the end of the first month after birth and remain constant thereafter. This experiment demonstrated that the rate at which synapses were replaced by sprouting after a lesion declined dramatically from 35 to 90 days of age. Thus, the juvenile period of the rat's life is marked by a considerable change in neuronal plasticity. This may be related to age-dependent effects in recovery from brain damage.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McWilliams, J R -- Lynch, G -- 5 F32 NS06821/NS/NINDS NIH HHS/ -- AG00538-06/AG/NIA NIH HHS/ -- New York, N.Y. -- Science. 1983 Aug 5;221(4610):572-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6867730" target="_blank"〉PubMed〈/a〉
    Keywords: *Aging ; Animals ; Axons/physiology ; Denervation ; Hippocampus/*physiology ; Male ; Nerve Degeneration ; Neuronal Plasticity ; Rats ; Synapses/*physiology ; Time Factors
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  • 20
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    Very brief visual experience eliminates plasticity in the cat visual cortex (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-07-08
    Description: Rearing cats in the dark extends the critical period for development of visual cortical neurons, which indicates that the experience of visual input is necessary to begin the developmental process. A single brief pulse of visual input (6 hours) during a period of dark-rearing eliminates delayed development in the visual cortex. Light therefore seems to rapidly trigger the developmental process, and once triggered, that process runs to completion in the absence of further input.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mower, G D -- Christen, W G -- Caplan, C J -- EY 03335/EY/NEI NIH HHS/ -- HD 06276/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1983 Jul 8;221(4606):178-80.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6857278" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cats ; Darkness ; *Neuronal Plasticity ; Time Factors ; Vision, Ocular/physiology ; Visual Cortex/growth & development/*physiology
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  • 21
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    Visual sustained attention: image degradation produces rapid sensitivity decrement over time (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-04-15
    Description: Perceptual sensitivity to a visual target presented in a random continuous sequence of targets and nontargets decreased rapidly over time when stimuli were highly degraded visually but not when moderately degraded or undegraded. Large declines in sensitivity, independent of changes in response criterion, were found after only 5 minutes of observation. These rapid decrements of sensitivity to degraded targets seem to result from demands on the limited capacity of visual attention.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nuechterlein, K H -- Parasuraman, R -- Jiang, Q -- 784040-29867-5/PHS HHS/ -- MH 30911/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1983 Apr 15;220(4594):327-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6836276" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; Adult ; *Attention ; Child ; Discrimination (Psychology) ; Female ; Humans ; Male ; Memory ; Time Factors ; *Visual Perception
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  • 22
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    Physiological correlates of prolonged sleep deprivation in rats (1983)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1983-07-08
    Description: The issue of whether sleep is physiologically necessary has been unresolved because experiments that reported deleterious effects of sleep deprivation did not control for the stimuli used to prevent sleep. In this experiment, however, experimental and control rats received the same relatively mild physical stimuli, but stimulus presentations were timed to reduce sleep severely in experimental rats but not in controls. Experimental rats suffered severe pathology and death; control rats did not.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rechtschaffen, A -- Gilliland, M A -- Bergmann, B M -- Winter, J B -- MH-18428/MH/NIMH NIH HHS/ -- MH-4151/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1983 Jul 8;221(4606):182-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6857280" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenal Glands/pathology ; Animals ; Body Weight ; Electroencephalography ; Male ; Organ Size ; Rats ; Rats, Inbred Strains ; Sleep Deprivation/*physiology ; Time Factors
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  • 23
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    Tumor promotion by phorbol esters in skin: evidence for a memory effect (1983)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1983-04-01
    Description: By means of a two-stage promotion protocol in mouse epidermis with 12-O-tetradecanoylphorbol-13-acetate as first-stage promoter and 12-O-retinoylphorbol-13-acetate as second-stage promoter, the effects of the former that are critical and obligatory for tumor promotion were shown to be irreversible in nature for at least 8 weeks. The reversibility of tumor promotion was related to the second stage of promotion, reflecting the reversibility of epidermal hyperplasia induced by 12-O-tetradecanoylphorbol-13-acetate.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Furstenberger, G -- Sorg, B -- Marks, F -- New York, N.Y. -- Science. 1983 Apr 1;220(4592):89-91.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6828884" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Carcinogens/*pharmacology ; Cell Line ; Epidermis/drug effects ; Female ; Hyperplasia/chemically induced ; Mice ; Mice, Inbred Strains ; Neoplasms, Experimental/chemically induced ; Phorbol Esters/*adverse effects ; Phorbols/*adverse effects ; Precancerous Conditions/chemically induced ; Skin Neoplasms/*chemically induced ; Tetradecanoylphorbol Acetate/*adverse effects ; Time Factors
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  • 24
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    Evolution of bunyaviruses by genome reassortment in dually infected mosquitoes (Aedes triseriatus) (1985)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1985-11-01
    Description: Aedes triseriatus mosquitoes became dually infected after ingesting two mutants of LaCrosse (LAC) virus simultaneously or after ingesting, by interrupted feeding, the two viruses sequentially within a 2-day period. After 2 weeks of incubation, approximately 25 percent of the vectors contained new virus genotypes as the result of RNA segment reassortment. New viruses were transmitted when the mosquitoes fed on mice. Viruses ingested more than 2 days after the initial infecting virus did not cause superinfection of the mosquito vectors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Beaty, B J -- Sundin, D R -- Chandler, L J -- Bishop, D H -- AI 15400/AI/NIAID NIH HHS/ -- AI 19688/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1985 Nov 1;230(4725):548-50.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/4048949" target="_blank"〉PubMed〈/a〉
    Keywords: Aedes/*microbiology ; Animals ; Blood ; Bunyaviridae/*genetics ; Genotype ; Insect Vectors ; Mutation ; Phenotype ; RNA, Viral/analysis ; Time Factors
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  • 25
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    Why do inbred mice evolve so quickly? (1985)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1985-06-07
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lewin, R -- New York, N.Y. -- Science. 1985 Jun 7;228(4704):1187.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/4039848" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Evolution ; Mice ; Mice, Inbred Strains/*genetics ; Species Specificity ; Time Factors
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  • 26
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    "Where" and "what" in vision (1985)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1985-06-07
    Description: The mixture of a few horizontal and vertical line segments embedded in an aggregate of diagonal line segments can be rapidly counted and their positions rapidly determined by a parallel (preattentive) process. However, the discrimination between horizontal and vertical orientation (that is, discrimination of a single conspicuous feature) requires serial search by focal attention. Under recent theories of attention, focal attention has been assumed to be required for the recognition of different combinations of features. According to the findings of this experiment, knowing "what" even a single feature is requires time-consuming search by focal attention. Only knowing "where" a target it is mediated by a parallel process.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sagi, D -- Julesz, B -- New York, N.Y. -- Science. 1985 Jun 7;228(4704):1217-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/4001937" target="_blank"〉PubMed〈/a〉
    Keywords: Attention/physiology ; Form Perception/physiology ; Humans ; Orientation/physiology ; Time Factors ; Visual Perception/*physiology
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  • 27
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    Complete development of hepatic stages of Plasmodium falciparum in vitro (1985)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1985-01-25
    Description: An in vitro model was developed to study the hepatic phase of Plasmodium falciparum, the only malaria parasite lethal to man. Primary cultures of human hepatocytes were inoculated with sporozoites of Brazilian and African strains of P. falciparum. On days 1 through 7 after inoculation examination of fluorescence-labeled and Giemsa-stained preparations demonstrated the presence of many intracellular parasites. In three separate sets of experiments all cultures were found to be infected with as many as 650 liver schizonts measuring up to 40 micrometers. After the addition of red blood cells, intraerythrocytic forms of P. falciparum were detected on days 12 and 13 by an immunofluorescence assay, indicating that the hepatic cycle had been completed in vitro.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mazier, D -- Beaudoin, R L -- Mellouk, S -- Druilhe, P -- Texier, B -- Trosper, J -- Miltgen, F -- Landau, I -- Paul, C -- Brandicourt, O -- New York, N.Y. -- Science. 1985 Jan 25;227(4685):440-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3880923" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Azure Stains ; Cells, Cultured ; Culture Media ; Erythrocytes/parasitology ; Fluorescent Antibody Technique ; Liver/*parasitology ; Plasmodium falciparum/cytology/*growth & development ; Time Factors
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  • 28
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    The 36-kilodalton substrate of pp60v-src is myristylated in a transformation-sensitive manner (1985)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1985-11-01
    Description: A primary intracellular substrate for pp60v-src kinase in a variety of avian and mammalian cells is a protein of 34 to 39 kilodaltons (kD). After incubation of chicken embryo fibroblasts (CEF) with [3H]myristic acid for 4 hours, the 36-kD protein contained covalently bound myristic acid by several criteria: (i) the radioactively labeled material comigrated with the 36-kD protein on sodium dodecyl sulfate-polyacrylamide gels in one and two dimensions, (ii) the labeled material was insoluble in chloroform-methanol, and (iii) radioactively labeled myristate could be recovered from the purified 36-kD protein. The resistance of the acyl fatty acid moiety to hydrolysis by hydroxylamine suggested that the covalent linkage to the 36-kD protein may be through an amide linkage. The [3H]myristic-acid labeling of the 36-kD protein in Rous sarcoma virus-transformed CEF showed a reduction of up to 45 percent when compared to an identical amount of 36-kD protein derived from normal cells; this reduction was not due to general changes in myristic acid metabolism in transformed cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Soric, J -- Gordon, J A -- CA-15823/CA/NCI NIH HHS/ -- CA-35378/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1985 Nov 1;230(4725):563-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2996139" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Avian Sarcoma Viruses ; *Cell Transformation, Viral ; Chick Embryo ; Electrophoresis, Polyacrylamide Gel ; Hydrolysis ; Hydroxylamine ; Hydroxylamines/pharmacology ; Methionine/metabolism ; Molecular Weight ; Myristic Acid ; Myristic Acids/*metabolism ; Oncogene Protein pp60(v-src) ; Retroviridae Proteins/*metabolism ; Time Factors
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  • 29
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    Agency scraps plan to limit ethylene oxide (1985)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1985-01-25
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sun, M -- New York, N.Y. -- Science. 1985 Jan 25;227(4685):392-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3966156" target="_blank"〉PubMed〈/a〉
    Keywords: *Ethylene Oxide/adverse effects ; Humans ; Maximum Allowable Concentration ; Time Factors ; United States ; United States Occupational Safety and Health Administration
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  • 30
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    Vision guides the adjustment of auditory localization in young barn owls (1985)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1985-11-01
    Description: Barn owls raised with one ear plugged make systematic errors in auditory localization when the earplug is removed. Young owls correct their localization errors within a few weeks. However, such animals did not correct their auditory localization errors when deprived of vision. Moreover, when prisms were mounted in front of their eyes, they adjusted their auditory localization to match the visual error induced by the prisms, as long as the visual and auditory errors were within the same quadrant of directions. The results demonstrate that, during development, the visual system provides the spatial reference for fine-tuning auditory localization.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Knudsen, E I -- Knudsen, P F -- R01 NS 16099-05/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1985 Nov 1;230(4725):545-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/4048948" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Auditory Perception/*physiology ; Birds/*physiology ; Sound Localization/*physiology ; Spatial Behavior ; Time Factors ; Vision, Ocular/*physiology
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  • 31
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    Is the war on cancer being won? (1985)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1985-08-09
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kolata, G -- New York, N.Y. -- Science. 1985 Aug 9;229(4713):543-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/4023699" target="_blank"〉PubMed〈/a〉
    Keywords: Humans ; Neoplasms/diagnosis/mortality/*prevention & control ; Research ; Statistics as Topic ; Time Factors ; United States
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  • 32
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    Induction of hepatitis B virus core gene in human cells by cytosine demethylation in the promoter (1985)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1985-05-31
    Description: A recombinant human cell line constructed by transfection of epithelial cells with a plasmid containing the hepatitis B virus core gene (HBc) was used to study the regulation of HBc gene expression. Methylation of a single Hpa II site 280 base pairs upstream from the structural gene was found to regulate the expression of the core gene. Expression increased in cells treated with 5'-azacytidine as a result of cytosine demethylation at this site, and there was a fivefold increase in the number of HBc gene transcripts in total cellular messenger RNA. The varied life cycle of hepatitis B virus in disease such as viral hepatitis and liver cancer may therefore be attributable to the site-specific regulation of the gene involved in replication of the viral DNA and to the cytophathic effects elicited by this gene in human cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Korba, B E -- Wilson, V L -- Yoakum, G H -- New York, N.Y. -- Science. 1985 May 31;228(4703):1103-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2581318" target="_blank"〉PubMed〈/a〉
    Keywords: 5-Methylcytosine ; Azacitidine/pharmacology ; Cytosine/*analogs & derivatives/metabolism ; DNA Restriction Enzymes ; DNA, Viral/genetics ; *Gene Expression Regulation/drug effects ; Genes, Viral ; Hepatitis B Core Antigens/*genetics ; Humans ; *Methylation ; *Promoter Regions, Genetic ; Time Factors ; Transcription, Genetic ; Virus Replication
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  • 33
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    Expression of two variant surface glycoproteins on individual African trypanosomes during antigen switching (1985)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1985-07-12
    Description: Individual Trypanosoma brucei rhodesiense organisms were observed in the process of switching variant surface glycoproteins (VSG's). During this switch, trypanosomes simultaneously expressed both pre- and postswitch VSG's uniformly over their surface as detected with monoclonal antibodies. Analysis of this switching event showed that trypanosomes expressing any one of three distinct preswitch VSG's could switch to expression of from one to three different postswitch VSG's. Up to 2.7 percent of the trypanosome population was in the process of switching at one time.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Esser, K M -- Schoenbechler, M J -- New York, N.Y. -- Science. 1985 Jul 12;229(4709):190-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3892689" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Monoclonal ; *Antigens, Protozoan ; *Antigens, Surface ; Cell Cycle ; Fluorescein ; Fluoresceins ; Fluorescent Antibody Technique ; Genes ; Mice ; Rhodamines ; Time Factors ; Trypanosoma brucei gambiense/*immunology ; Trypanosomiasis, African/immunology
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  • 34
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    Inhibition of interferon-gamma may suppress allograft reactivity by T lymphocytes in vitro and in vivo (1985)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1985-07-12
    Description: The addition to mixed-leukocyte reactions of monoclonal antibodies to interferon-gamma abrogated alloantigen recognition and induction of cytotoxic T lymphocytes by inducing early and highly effective suppressor T lymphocytes. This inhibitory activity was not confined to in vitro models, since daily injection of the antibodies into CBA/J mice blocked the usual rejection of allogenic tumor cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Landolfo, S -- Cofano, F -- Giovarelli, M -- Prat, M -- Cavallo, G -- Forni, G -- New York, N.Y. -- Science. 1985 Jul 12;229(4709):176-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3160110" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Monoclonal ; Cytotoxicity, Immunologic ; *Graft Rejection ; Interferon-gamma/*physiology ; Lymphocyte Culture Test, Mixed ; Mice ; Neoplasm Transplantation ; T-Lymphocytes/*immunology ; Time Factors
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  • 35
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    Responsiveness and receptive field size of carp horizontal cells are reduced by prolonged darkness and dopamine (1985)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1985-09-13
    Description: In the fish retina the interplexiform cells contain dopamine and provide a centrifugal pathway from the inner plexiform layer to horizontal cells of the outer plexiform layer. Dopamine application reduced the responsiveness and receptive field size of cone horizontal cells, as did a prolonged period of complete darkness. Other results suggest that the interplexiform cells may release dopamine after a prolonged period in the dark. The interplexiform-horizontal cell system may modify the strength of the antagonistic surrounds of retinal neurons as a function of time in the dark.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mangel, S C -- Dowling, J E -- EY-00824/EY/NEI NIH HHS/ -- EY-05102/EY/NEI NIH HHS/ -- New York, N.Y. -- Science. 1985 Sep 13;229(4718):1107-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/4035351" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Darkness ; Dopamine/*pharmacology ; Electrophysiology ; Evoked Potentials ; Fishes ; Light ; Membrane Potentials ; Retina/*cytology/drug effects ; 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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  • 36
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    Prostacyclin synthesis induced in vascular cells by interleukin-1 (1985)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1985-07-12
    Description: Supernatants from cultures of human monocytes that had been stimulated with endotoxin or silica induced the synthesis of prostacyclin in endothelial and smooth muscle cells. The lymphokine mediating these effects on the cells of the blood vessel wall was identified as interleukin-1; interferons and interleukin-2 were inactive. Interleukin-1-induced prostacyclin synthesis represents a new aspect of the interaction between the immune system (as well as other tissues) and the vessel wall and may serve as a basis for the development of new strategies in antithrombotic therapy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rossi, V -- Breviario, F -- Ghezzi, P -- Dejana, E -- Mantovani, A -- New York, N.Y. -- Science. 1985 Jul 12;229(4709):174-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2409598" target="_blank"〉PubMed〈/a〉
    Keywords: Blood Vessels/*metabolism ; Cells, Cultured ; Endothelium/*metabolism ; Epoprostenol/*biosynthesis ; Humans ; Interferons/pharmacology ; Interleukin-1/*pharmacology ; Interleukin-2/pharmacology ; Monocytes/physiology ; Muscle, Smooth/*metabolism ; Time Factors
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Evolution in inbred strains of mice appears rapid (1985)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1985-06-07
    Description: Genetic variation at 97 loci in ten commonly used inbred strains of mice is greatly in excess of that expected under current assumptions. Evidence against all of the readily apparent explanations is presented and the possibility of early selection for heterozygosity or of conversion is suggested. The common ancestor of these strains is estimated to have occurred about 150 years ago.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fitch, W M -- Atchley, W R -- New York, N.Y. -- Science. 1985 Jun 7;228(4704):1169-75.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/4001935" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Evolution ; Heterozygote ; Mice ; Mice, Inbred Strains/*genetics ; Mutation ; Species Specificity ; 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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  • 38
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    Partial inversion of the initiation-promotion sequence of multistage tumorigenesis in the skin of NMRI mice (1985)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1985-10-04
    Description: Alterations in NMRI mouse skin induced by the phorbol ester 12-O-tetradecanoylphorbol-13-acetate in "stage I of tumor promotion" are slowly reversible, and this reversibility has a half-time of 10 to 12 weeks. The tumor response observed in the course of an initiation-promotion experiment in vivo is independent of whether stage I of promotion occurs before or after initiation. Since the time interval between treatment with the promoter, and subsequent initiation can be extended up to at least 6 weeks, an enhancement of initiation because of promoter-induced cellular DNA synthesis seems to be unlikely. This result may be inconsistent with the two-stage model of tumor promotion because it indicates that in skin the existence of initiated cells is not required for the induction of cellular alterations that are essential for the stage of skin tumorigenesis called stage I of promotion.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Furstenberger, G -- Kinzel, V -- Schwarz, M -- Marks, F -- New York, N.Y. -- Science. 1985 Oct 4;230(4721):76-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3929385" target="_blank"〉PubMed〈/a〉
    Keywords: 9,10-Dimethyl-1,2-benzanthracene ; Animals ; *Cell Transformation, Neoplastic ; *Diterpenes ; Female ; Mice ; Phorbol Esters ; Skin Neoplasms/*chemically induced ; Terpenes ; Tetradecanoylphorbol Acetate ; 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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  • 39
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    Hypothalamic reward mechanism: two first-stage fiber populations with a cholinergic component (1985)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1985-02-01
    Description: Refractory periods were estimated for fibers of the hypothalamic substrate of brain stimulation reward. Two nonoverlapping populations were evident: a homogeneous fast population and a more heterogeneous slow population. Cholinergic blockade eliminated the contribution of the fast but not the slow fibers, while dopaminergic blockade reduced responding without significantly influencing either directly activated fiber population. These data indicate that the hypothalamic reward substrate is more complex than has been widely appreciated; it contains two or more parallel subsystems, and one of these subsystems has a cholinergic link.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gratton, A -- Wise, R A -- DA 1720/DA/NIDA NIH HHS/ -- New York, N.Y. -- Science. 1985 Feb 1;227(4686):545-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2981439" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Atropine/pharmacology ; Cholinergic Fibers/*physiology ; Dopamine/physiology ; Electric Stimulation ; Hypothalamus/*physiology ; Medial Forebrain Bundle/*physiology ; Neural Pathways/*physiology ; Pimozide/pharmacology ; Rats ; *Reward ; 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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  • 40
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    A guarded endorsement for shock therapy (1985)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1985-06-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Holden, C -- New York, N.Y. -- Science. 1985 Jun 28;228(4707):1510-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/4012304" target="_blank"〉PubMed〈/a〉
    Keywords: Advisory Committees ; Anesthetics/adverse effects ; Depression/*therapy ; *Electroconvulsive Therapy/adverse effects ; Federal Government ; Humans ; Memory Disorders/etiology ; Mentally Ill Persons ; National Institutes of Health (U.S.) ; Risk ; *Risk Assessment ; Time Factors ; United States ; disfavor has led to calls for more research on all aspects of this controversial ; treatment. A recent consensus conference sponsored by the National Institutes of ; Health produced cautious approval of ECT to treat severe depression. After ; reviewing existing research data and listening to testimony on ECT's effects, ; especially effects on memory, the panel recommended that immediate research be ; done on methods and effects of ECT, that ECT training be included in medical and ; psychiatric education, and that more attention be paid to review and regulatory ; mechanisms. Holden speculates that the persistent and fierce opposition to ECT ; reflects the schism within psychiatry between biological and psychodynamic ; treatment approaches, as well as the impact of public information gained largely ; from overly harrowing portrayals of ECT.
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  • 41
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    Tissue plasminogen activator reduces neurological damage after cerebral embolism (1985)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1985-12-13
    Description: Intravenous administration of tissue plasminogen activator immediately after the injection of numerous small blood clots into the carotid circulation in rabbit embolic stroke model animals caused a significant reduction in neurological damage. In vitro studies indicate that tissue plasminogen activator produced substantial lysis of clots at concentrations comparable to those expected in vivo, suggesting that this may be the mechanism of action of this drug. Drug-induced hemorrhages were not demonstrable. Tissue plasminogen activator may be of value for the immediate treatment of embolic stroke.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zivin, J A -- Fisher, M -- DeGirolami, U -- Hemenway, C C -- Stashak, J A -- New York, N.Y. -- Science. 1985 Dec 13;230(4731):1289-92.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3934754" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cerebrovascular Disorders/therapy ; Disease Models, Animal ; Intracranial Embolism and Thrombosis/*therapy ; Rabbits ; Time Factors ; Tissue Plasminogen Activator/*therapeutic use
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 42
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    Differential effects of classical and atypical antipsychotic drugs on A9 and A10 dopamine neurons (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-09-09
    Description: Prolonged treatment with classical antipsychotic drugs decreased the number of spontaneously active dopamine neurons in both the substantia nigra (A9) and the ventral tegmental area (A10) of the rat brain. In contrast, treatment with atypical antipsychotic drugs selectively decreased the number of A10 dopamine neurons. Related drugs lacking antipsychotic efficacy failed to decrease dopamine activity. These findings suggest that the inability of atypical antipsychotic drugs to decrease A9 dopamine neuronal activity may be related to their lower potential for causing tardive dyskinesia and that the inactivation of A10 neurons may be involved in the delayed onset of therapeutic effects during treatment.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉White, F J -- Wang, R Y -- MH 00378/MH/NIMH NIH HHS/ -- MH-34424/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1983 Sep 9;221(4615):1054-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6136093" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antipsychotic Agents/*pharmacology ; Dopamine/*metabolism ; Male ; Metoclopramide/pharmacology ; Mice ; Neurons/metabolism ; Pons/*metabolism ; Rats ; Rats, Inbred Strains ; Substantia Nigra/*metabolism ; 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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