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  • Artikel  (60)
  • Pregnancy  (38)
  • Kinetics  (23)
  • American Association for the Advancement of Science (AAAS)  (60)
  • Annual Reviews
  • 1995-1999
  • 1980-1984  (60)
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  • 1930-1934
  • 1980  (60)
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  • Artikel  (60)
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  • 1995-1999
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  • 1
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-08-01
    Beschreibung: Newborn infants, chronically exposed in utero to low doses of methadone with or without concomitant heroin, display more rapid eye movement sleep and less quiet sleep than control infants, while babies fetally exposed to both opiates and nonopiates have less organization of sleep states. Other perinatal factors, such as birth weight and gestational age, are related more to the amount of fetal drug exposure than to the type.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dinges, D F -- Davis, M M -- Glass, P -- New York, N.Y. -- Science. 1980 Aug 1;209(4456):619-21.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7190326" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Birth Weight ; Female ; Heroin/*adverse effects ; Heroin Dependence/drug therapy ; Humans ; Infant, Newborn ; Infant, Newborn, Diseases/*chemically induced ; Maternal-Fetal Exchange ; Methadone/*adverse effects/therapeutic use ; Nervous System Diseases/*chemically induced ; Pregnancy ; Sleep/*drug effects ; Substance-Related Disorders
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Publikationsdatum: 1980-05-02
    Beschreibung: The highly selective, enzyme-activated, irreversible inhibitor of L-ornithine decarboxylase, DL-alpha-difluoromethylornithine, suppresses the increase in uterine L-ornithine decarboxylase activity associated with early embryogenesis in the mouse and arrests embryonic development at that stage. Contragestational effects were confirmed in the rat and rabbit. An increase in L-ornithine decarboxylase activity that leads to a rapid increase in putrescine concentration appears to be essential during a critical period after implantation for continued mammalian embryonal growth.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fozard, J R -- Part, M L -- Prakash, N J -- Grove, J -- Schechter, P J -- Sjoerdsma, A -- Koch-Weser, J -- New York, N.Y. -- Science. 1980 May 2;208(4443):505-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6768132" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adenosylmethionine Decarboxylase/metabolism ; Animals ; Carboxy-Lyases/*physiology ; Eflornithine ; Embryo, Mammalian/drug effects/*physiology ; Female ; Gestational Age ; Mice ; Ornithine/*analogs & derivatives/pharmacology ; Ornithine Decarboxylase/*physiology ; Ornithine Decarboxylase Inhibitors ; Polyamines/metabolism ; Pregnancy ; Rabbits ; Rats ; Uterus/drug effects/*metabolism
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Publikationsdatum: 1980-03-28
    Beschreibung: When microbial strains compete for the same limiting nutrient in continuous culture, resource-based competition theory predicts that only one strain will survive and all others will die out. The surviving strain expected from theory will be the one with the smallest subsistence or "break-even" concentration of the limiting resource, a concentration defined by the J parameter. This prediction has been confirmed in the case of auxotrophic bacterial strains competing for limiting tryptophan. Because the value of J can be measured on the strains grown alone, the theory can predict the qualitative outcomes of mixed-growth competition in advance of actual competition.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hansen, S R -- Hubbell, S P -- New York, N.Y. -- Science. 1980 Mar 28;207(4438):1491-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6767274" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Bacteria/*growth & development ; Culture Media ; Drug Resistance, Microbial ; Escherichia coli/growth & development ; Kinetics ; Models, Theoretical ; Nalidixic Acid/pharmacology ; Nutritional Physiological Phenomena ; Pseudomonas aeruginosa/growth & development ; Tryptophan/metabolism
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-03-21
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Holden, C -- New York, N.Y. -- Science. 1980 Mar 21;207(4437):1323-5, 1327-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7188816" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adult ; Environment ; Female ; Genetics, Medical ; Humans ; Intelligence ; Male ; Pregnancy ; Twins/*psychology ; Twins, Monozygotic/*psychology
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-05-09
    Beschreibung: Olfactory sensitivity to acetic acid, isobutyric acid, and 2-sec-butyl-cyclohexanone was tested in 97 adult male twin pairs to determine the extent to which variation in odor perception was genetically determined. Analysis of the data revealed no evidence for heritability of olfactory sensitivity. However, factors significantly associated with odor perception included cigar, pipe, and cigarette smoking; body fatness; alcohol consumption; and diabetes mellitus.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hubert, H B -- Fabsitz, R R -- Feinleib, M -- Brown, K S -- New York, N.Y. -- Science. 1980 May 9;208(4444):607-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7189296" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Acetates ; Adult ; Alcohol Drinking ; Butyrates ; Cyclohexanones ; *Environment ; Female ; *Genes ; Humans ; Male ; Middle Aged ; Pregnancy ; Sensory Thresholds ; Skinfold Thickness ; Smell/*physiology ; Smoking ; *Twins ; Twins, Dizygotic ; Twins, Monozygotic
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 6
    Publikationsdatum: 1980-11-21
    Beschreibung: Rats and guinea pigs, when immunized with mouse nerve growth factor, produce antibodies that cross-react with their own nerve growth factor. The antibodies reach developing offspring of these animals both prenatally (rats and guinea pigs) and postnatally (rats). Depriving the fetus of nerve growth factor in this way results in the destruction of up to 85 percent of dorsal root ganglion neurons as well as destruction of sympathetic neurons. Sensory neurons of placodal origin in the nodose ganglion were not affected. These data demonstrate that dorsal root ganglion neurons go through a phase of nerve growth factor dependence in vivo.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Johnson, E M Jr -- Gorin, P D -- Brandeis, L D -- Pearson, J -- HD12260/HD/NICHD NIH HHS/ -- HL20604/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1980 Nov 21;210(4472):916-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7192014" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; *Antibodies ; Female ; Ganglia, Spinal/cytology/*embryology/growth & development ; Guinea Pigs ; Lactation ; Maternal-Fetal Exchange ; Milk/immunology ; Nerve Growth Factors/*immunology ; Pregnancy ; Rats
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 7
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-10-31
    Beschreibung: Treatment of pregnant rats with reserpine prevented the normal disappearance of catecholamine fluorescence in presumptive neuroblasts of the embryonic gut. These cells normally express the noradrenergic phenotype transiently during embryonic development. The effect of reserpine was reproduced by treating mothers with hydrocortisone acetate. Moreover, the reserpine effect was blocked by treatment with dexamethasone, which inhibits the stress-induced increase in plasma glucocorticoids, and by mitotone, which causes adrenocortical cytolysis. It is concluded that reserpine, through the mediation of maternal glucocorticoid hormones, alters the phenotypic expression of these embryonic neuroblasts.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jonakait, G M -- Bohn, M C -- Black, I B -- HD 12108/HD/NICHD NIH HHS/ -- NS 06400/NS/NINDS NIH HHS/ -- NS 10259/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1980 Oct 31;210(4469):551-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7423206" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Catecholamines/metabolism ; Female ; Hydrocortisone/*pharmacology ; Intestines/*embryology/innervation ; Maternal-Fetal Exchange ; Pregnancy ; Pregnancy, Animal/*drug effects ; Rats ; Reserpine/*pharmacology ; Sympathetic Nervous System/*embryology
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 8
    Publikationsdatum: 1980-04-11
    Beschreibung: A high-molecular-weight protein with beta-endorphin- and adrenocorticotropin-immunoreactivities was isolated from extracts of human placenta after several purification steps, including immunoadsorption with a well-characterized antiserum raised to beta-endorphin. This protein was identified as the heavy chain of the human immunoglobulin class IgG1. These results have led to the recognition of homologies in the amino acid sequences of these physiologically unrelated molecules. They also suggest caution in accepting immunological competence as the sole criterion of the chemical identity of a ligand.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Julliard, J H -- Shibasaki, T -- Ling, N -- Guillemin, R -- New York, N.Y. -- Science. 1980 Apr 11;208(4440):183-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6244620" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acid Sequence ; Electrophoresis, Polyacrylamide Gel ; Endorphins/*analysis ; Female ; Humans ; Immunoglobulin G/*analysis ; Placental Extracts/*analysis ; Pregnancy ; Radioimmunoassay ; beta-Endorphin
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 9
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-10-31
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kolata, G B -- New York, N.Y. -- Science. 1980 Oct 31;210(4469):518-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7423201" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Abnormalities, Drug-Induced/*etiology ; Dicyclomine ; Doxylamine/*adverse effects ; Drug Combinations/adverse effects ; Drug Evaluation ; Female ; Humans ; Jurisprudence ; Pregnancy ; Pyridines/*adverse effects ; Pyridoxine/*adverse effects ; United States ; United States Food and Drug Administration
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 10
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-09-12
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kolata, G B -- New York, N.Y. -- Science. 1980 Sep 12;209(4462):1216-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6157193" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Abortion, Therapeutic/standards ; Female ; Genetic Diseases, Inborn ; Government Regulation ; Great Britain ; Humans ; Neural Tube Defects/*diagnosis ; Pregnancy ; *Pregnant Women ; *Prenatal Diagnosis ; Reagent Kits, Diagnostic ; Social Justice ; Spina Bifida Occulta/diagnosis ; United States ; Voluntary Programs ; alpha-Fetoproteins/analysis
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 11
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-03-07
    Beschreibung: Nuclear receptors for both estradiol and progesterone were present in twofold higher concentrations in implantation sites than in nonimplantation regions of the endometrium of 6-day pregnant rats. Decidualization in the absence of an embryo was not accompanied by a similar increase in the concentration of nuclear receptors. Moreover, this difference in receptor distribution between the implantation and nonimplantation areas persisted when a major part of the maternal supply of sex steroids was suppressed by ovariectomy on day 5 of pregnancy. These results support the hypothesis that steroids originating from the embryo affect the endometrial implantation site.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Logeat, F -- Sartor, P -- Hai, M T -- Milgrom, E -- New York, N.Y. -- Science. 1980 Mar 7;207(4435):1083-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7355273" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Blastocyst/*metabolism ; Castration ; Cell Nucleus/metabolism ; Decidua/metabolism ; Endometrium/*metabolism/ultrastructure ; Female ; Gestational Age ; Pregnancy ; Pseudopregnancy ; Rats ; Receptors, Estrogen/*metabolism ; Receptors, Progesterone/*metabolism
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 12
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-02-15
    Beschreibung: Autoradiographic and biochemical analyses of the hearts of female rhesus monkeys and baboons indicate that atrial and ventricular myocardial cells contain androgen receptors. Although the specific effects of nuclear uptake and retention of androgen on the function of heart muscle cells are not known, the presence of this receptor suggests that sex steroid hormones may affect myocardial function directly and may explain some of the peculiar differences in heart disease between men and women.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McGill, H C Jr -- Anselmo, V C -- Buchanan, J M -- Sheridan, P J -- New York, N.Y. -- Science. 1980 Feb 15;207(4432):775-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6766222" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Androgens/*metabolism ; Animals ; Coronary Disease/*etiology ; Dihydrotestosterone/metabolism ; Estradiol/metabolism ; Female ; Haplorhini ; Kinetics ; Macaca mulatta ; Myocardium/*metabolism ; Papio ; Receptors, Androgen/*metabolism ; Receptors, Steroid/*metabolism ; Sex Factors
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 13
    Publikationsdatum: 1980-07-25
    Beschreibung: Accurate measurements of intracellular calcium activities in salivary gland epithelial cells of the insect Phormia regina were obtained with microelectrodes in which N,N'-di(11-ethoxycarbonyl)undecyl-N,N'-4,5-tetramethyl-3,6-dioxaoctane diacid diamide wsa incorporated in a liquid membrane system. When calibrated in solutions approximating the ionic concentration of the cell interior, these microelectrodes gave rapid stable responses that were linear functions of the logarithm of calcium activities and were not affected by potassium, sodium and magnesium. Continuous monitoring of calcium activities during serotonin-induced saliva release provided direct evidence of hormonal influence on transmembrane calcium movement and spontaneous regulation of intracellular calcium by stimulated cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉O'Doherty, J -- Youmans, S J -- Armstrong, W M -- Stark, R J -- New York, N.Y. -- Science. 1980 Jul 25;209(4455):510-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7394518" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Biological Transport/drug effects ; Calcium/*metabolism ; Diptera/*metabolism ; Epithelium/metabolism ; Kinetics ; Magnesium/pharmacology ; Microelectrodes ; Salivary Glands/drug effects/*metabolism ; Serotonin/pharmacology
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 14
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-03-21
    Beschreibung: The interplay of insulin, cortisol, and prolactin induces synthesis of casein and alpha-lactalbumin in cultured mammary explants from mature virgin mice. A striking difference has been found between the optimal concentrations of cortisol required for maximal induction of the two milk proteins in vitro: 3 x 10(-8) molar for alpha-lactalbumin and 3 x 10(-6) molar for casein. Moreover, 10(-7) to 10(-5) molar cortisol caused progressive inhibition of alpha-lactalbumin accumulation. Such differential actions of cortisol may partly account for the asynchronous synthesis of the two proteins during pregnancy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ono, M -- Oka, T -- New York, N.Y. -- Science. 1980 Mar 21;207(4437):1367-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6986657" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Caseins/*biosynthesis ; Dose-Response Relationship, Drug ; Drug Interactions ; Female ; Hydrocortisone/*pharmacology ; Insulin/pharmacology ; Lactalbumin/*biosynthesis ; Mammary Glands, Animal/drug effects/*metabolism ; Mice ; Organ Culture Techniques ; Pregnancy ; Prolactin/pharmacology
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 15
    Publikationsdatum: 1980-05-02
    Beschreibung: A striking inverse correlation was found in umbilical cord plasma between the concentrations of dehydroisoandrosterone sulfate and low-density lipoprotein (LDL)-cholesterol but not high-density lipoprotein-cholesterol or very low density lipoprotein-cholesterol. Dehydroisoandrosterone sulfate is a major secretory product of the human fetal adrenal and the principal precursor of placental estrogen production. The data suggest that the concentrations for LDL-cholesterol in fetal plasma are influenced by the rate of utilization of LDL-cholesterol by the fetal adrenal for steroidogenesis and are not necessarily related to a genetic predisposition for hypercholesterolemia or other lipoprotein disorders.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Parker, C R Jr -- Simpson, E R -- Bilheimer, D W -- Leveno, K -- Carr, B R -- MacDonald, P C -- New York, N.Y. -- Science. 1980 May 2;208(4443):512-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6445079" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adrenal Cortex/metabolism ; Adrenal Cortex Hormones/secretion ; Cholesterol/*blood ; Dehydroepiandrosterone/*analogs & derivatives/blood/metabolism ; Dehydroepiandrosterone Sulfate ; Female ; Fetal Blood/*analysis ; Humans ; Hypertension/metabolism ; Lipoproteins, LDL/*blood/metabolism ; Maternal-Fetal Exchange ; Pregnancy ; Pregnancy Complications, Cardiovascular/metabolism
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 16
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-11-21
    Beschreibung: The rate at which glucose enters nerve terminals in muscle was estimated indirectly by measuring changes in miniature end-plate potential frequency D-Glucose entered nerve terminals in muscles with a fast twitch more rapidly than it entered those with a slow twitch. This suggests that nerve terminals in fast- and slow-twitch muscles differ in their rate of metabolism.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pickett, J B -- New York, N.Y. -- Science. 1980 Nov 21;210(4472):927-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7434009" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Biological Transport ; Diaphragm/innervation ; Glucose/*metabolism ; Kinetics ; Membrane Potentials ; Nerve Endings/*metabolism ; Neuromuscular Junction/*metabolism ; Osmolar Concentration ; Rats
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 17
    Publikationsdatum: 1980-08-22
    Beschreibung: The binding of [6-alanine]gonadotropin-releasing hormone to pituitary plasma membranes increased threefold between metestrus and early proestrus in female rats. Receptor numbers fell rapidly on the afternoon of proestrus coincident with the preovulatory gonadotropin surge. The numbers of receptors for gonadotropin-releasing hormone were positively correlated with concentrations of estradiol in serum; this pattern may be a necessary component of increased pituitary sensitivty to gonadotropin-releasing hormone observed during proestrus.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Savoy-Moore, R T -- Schwartz, N B -- Duncan, J A -- Marshall, J C -- New York, N.Y. -- Science. 1980 Aug 22;209(4459):942-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6250218" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Cell Membrane/metabolism ; Estradiol/blood ; *Estrus ; Feedback ; Female ; Follicle Stimulating Hormone/blood ; Gonadotropin-Releasing Hormone/analogs & derivatives/*metabolism ; Kinetics ; Luteinizing Hormone/blood ; Pituitary Gland, Anterior/*metabolism ; Pregnancy ; Progesterone/blood ; Rats ; Receptors, Cell Surface/*metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 18
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-08-22
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉New York, N.Y. -- Science. 1980 Aug 22;209(4459):877-80.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7403855" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Abortion, Spontaneous/etiology ; China ; *Chromosome Aberrations ; Dose-Response Relationship, Radiation ; *Environmental Exposure ; Female ; Genetic Diseases, Inborn/*etiology ; Growth/radiation effects ; Humans ; *Maximum Allowable Concentration ; Neoplasms, Radiation-Induced/epidemiology/etiology ; Pregnancy ; *Radiation, Ionizing
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    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 19
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-03-28
    Beschreibung: The food dye erythrosine (Erythrosin B; FD & C No. 3) was applied to isolated neuromuscular synapses in the frog, and its effects on the spontaneous quantal release of acetylcholine were examined with electrophysiological techniques. At concentrations of 10 muM or greater this anionic dye produced an irreversible, dose-dependent increase in neurotransmitter release. This increase did not depend on the presence of calcium ions in the bathing medium. These increase did not depend on the presence of calcium ions in the bathing medium. These results suggest that erythrosine might prove a useful pharmacological tool for studying the process of transmitter release, but that its use as a food additive should be reexamined.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Augustine, G J Jr -- Levitan, H -- New York, N.Y. -- Science. 1980 Mar 28;207(4438):1489-90.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6244619" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Anura ; Calcium/physiology ; Erythrosine/*pharmacology ; Fluoresceins/*pharmacology ; Kinetics ; Membrane Potentials/drug effects ; Motor Endplate/drug effects ; Neuromuscular Junction/*drug effects ; Rana pipiens ; Stimulation, Chemical ; Synaptic Transmission/*drug effects
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 20
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    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-06-06
    Beschreibung: A protein that binds spermine specifically was separated from normal rabbit serum by affinity chromatography. Immunoelectrophoresis, the Ouchterlony immunodiffusion test, and gradient gel electrophoresis indicated that this protein has immunoglobulin characteristics and consists of several populations of antibodies to spermine. These were sequentially released from Sepharose-spermine gel by step-wise elution with solutions ranging in pH from 4 to 1. The binding constants varied from 5.0 x 10(8) to 11.1 x 10(8) liters per mole. These globulins did not react with monoacetylputrescine, L-ornithine, L-lysine, and histamine. Negligible cross-reactivity was detected with spermidine, putrescine, N8-monoacetylspermidine, cadaverine, and diaminopropane. Since perturbations in polyamine metabolism have been identified in several diseases, the study of extracellular polyamine homeostasis may reveal an important regulatory function for this protein.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bartos, D -- Bartos, F -- Campbell, R A -- Grettie, D P -- Smejtek, P -- New York, N.Y. -- Science. 1980 Jun 6;208(4448):1178-81.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7375929" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Antibodies/*isolation & purification ; Binding Sites, Antibody ; Chromatography, Affinity ; Homeostasis ; Immunoglobulin G/isolation & purification ; Kinetics ; Rabbits ; Spermine/*immunology/metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 21
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-10-03
    Beschreibung: Suckling is the only behavior that is common among mammals. In newborn albino rats it is originally elicited by amniotic fluid deposited by the mother during parturition. Subsequent suckling is stimulated by saliva deposited on the nipples by the infant rats. Internal controls over the volume of milk suckled do not appear until infant rats are about 2 weeks of age at which time gastric distension, milk, systemic dehydration, and intestinal hormone cholecystokinin suppress milk intake derived through suckling. The development of controls over suckling appetite appears to parallel that of consummatory control. Until about 2 weeks of age infant rats choose to suckle a nonlactating nipple with the same frequency as a lactating nipple. Thereafter, the lactating nipple is unanimously chosen. These studies suggest differences and commonalities in the suckling behavior of laboratory rats and other mammals.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Blass, E M -- Teicher, M H -- AM-18560/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1980 Oct 3;210(4465):15-22.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6997992" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animal Population Groups/*physiology ; Animals ; Animals, Suckling/*physiology ; Cholecystokinin/physiology ; Dehydration ; Feeding Behavior/physiology ; Female ; Food Deprivation ; Humans ; Instinct ; Lactation ; Lithium/pharmacology ; Maternal Behavior ; Pheromones ; Pregnancy ; Rats ; Saliva ; Sucking Behavior/drug effects/*physiology ; Time Factors
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 22
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    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-05-09
    Beschreibung: Moderate chronic malnutrition has only a minor effect on fecundity (reproductive capacity), and the resulting effect on fertility (actural reproduction) is very small. Among the fecundity components examined here in noncontracepting populations, age at menarche and the duration of lactational amenorrhea appear to be the ones most affected by malnutrition. But from neither of those effects can a difference in fertility of more than a few percent be expected between poorly and well-nourished women in developing countries.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bongaarts, J -- New York, N.Y. -- Science. 1980 May 9;208(4444):564-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7367878" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Abortion, Induced ; Adolescent ; Adult ; Age Factors ; Behavior ; Birth Intervals ; Contraception ; Female ; *Fertility ; Fetal Death/epidemiology ; Humans ; Lactation ; Male ; Marriage ; Menarche ; Menopause ; Middle Aged ; Nutrition Disorders/*physiopathology ; Nutritional Physiological Phenomena ; Ovulation ; Pregnancy ; Spermatogenesis
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 23
    Publikationsdatum: 1980-07-11
    Beschreibung: The high-affinity binding of triatiated imipramine to platelet membranes was compared in samples from 16 untreated depressed women and 21 age-matched controls of the same sex. The maximal binding in the depressed group was significantly lower than that of the controls, although the affinity constants were similar. These results suggest that binding of tritiated imipramine in human platelets may represent a biochemical index of depression, possibly reflecting similar changes in the brain.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Briley, M S -- Langer, S Z -- Raisman, R -- Sechter, D -- Zarifian, E -- New York, N.Y. -- Science. 1980 Jul 11;209(4453):303-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7384806" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adult ; Aged ; Blood Platelets/*analysis ; Cell Membrane/metabolism ; Depression/*blood ; Humans ; Imipramine/*blood ; Kinetics ; Middle Aged ; Receptors, Drug/*metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 24
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    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-07-25
    Beschreibung: Serotonin infused into the lateral ventricle in rats produced a dose-dependent depression of the acoustic startle reflex. When infused onto the spinal cord, serotonin produced a dose-dependent increase in startle. Thus the same neurotransmitter can modulate the same behavior in opposite ways, depending on which part of the central nervous system is involved.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Davis, M -- Strachan, D I -- Kass, E -- New York, N.Y. -- Science. 1980 Jul 25;209(4455):521-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7394520" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Dose-Response Relationship, Drug ; Kinetics ; Male ; Rats ; Reflex, Acoustic/*drug effects ; Reflex, Startle/*drug effects ; Serotonin/*pharmacology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 25
    Publikationsdatum: 1980-02-22
    Beschreibung: Rates of tyrosine and lysine transport and incorporation into protein were measured in control and undernourished weanling rats. Undernutrition was induced by feeding lactating dams a low protein diet (12 percent casein) from birth to day 21. At weaning, body and brain weights of undernourished rats were 50 percent and 88 percent, respectively, of control values. Lysine and tyrosine transport rates into skeletal muscle were reduced by over 75 percent, more than twice the reduction seen in brain. Rates of amino acid incorporation into muscle protein were reduced by approximately 50 percent; the change in rate of incorporation into brain protein was not statistically significant. These data indicate that, in spite of marked retardation of amino acid transport into brain, the brain seems fully capable of maintaining normal rates of protein synthesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Freedman, L S -- Samuels, S -- Fish, I -- Schwartz, S A -- Lange, B -- Katz, M -- Morgano, L -- New York, N.Y. -- Science. 1980 Feb 22;207(4433):902-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6766565" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acids/*metabolism ; Animals ; Animals, Newborn/metabolism ; Biological Transport ; Body Weight ; Brain/growth & development/*metabolism ; Disease Models, Animal ; Female ; Lactation ; Male ; Muscles/*metabolism ; Pregnancy ; Protein-Energy Malnutrition/*metabolism ; Rats
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 26
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-04-04
    Beschreibung: Close correlations between the development of the anticonvulsant effects of diphenylhydantoin and increases in tritiated diazepam binding were observed in rats from fetal day 16 to maturation. In contrast, significant decreases in tritiated diazepam binding were observed in 2- and 3-week-old rats that were exposed in utero to diphenylhydantoin. These changes can be correlated with reported increases in seizure susceptibility after prenatal exposure to diphenylhydantoin.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gallager, D W -- Mallorga, P -- New York, N.Y. -- Science. 1980 Apr 4;208(4439):64-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7361107" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Benzodiazepines/metabolism ; Cerebral Cortex/*metabolism ; Diazepam/*metabolism ; Female ; Fetus/metabolism ; *Maternal-Fetal Exchange ; Phenytoin/administration & dosage/*pharmacology ; Pregnancy ; Rats
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 27
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-10-10
    Beschreibung: Maternal pain thresholds in rats were determined during various stages of pregnancy and parturition by measuring the intensity of electric shock that elicited reflexive jumping. There was a gradual rise in the pain threshold between 16 and 4 days prior to parturition and a more abrupt rise 1 to 2 days before that event. This increase was abolished by long-term administration of the narcotic antagonist naltrexone. The endorphin system is thus an important component of intrinsic mechanisms that modulate responsiveness to aversive stimuli. The data also demonstrate the activation during pregnancy of an endorphin system that is apparently quiescent in nonpregnant female rats treated the same way.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gintzler, A R -- NIMH GRANT DA01771/DA/NIDA NIH HHS/ -- New York, N.Y. -- Science. 1980 Oct 10;210(4466):193-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7414330" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Dose-Response Relationship, Drug ; Endorphins/antagonists & inhibitors/*physiology ; Female ; Naltrexone/pharmacology ; Pain/*physiopathology ; Pregnancy ; *Pregnancy, Animal ; Rats ; Time Factors
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 28
    facet.materialart.
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-05-02
    Beschreibung: Phenobarbital administration to pregnant rats from day 12 to day 19 of gestation suppressed body weight gain and produced significant effects on reproductive function in their offspring. These effects included delays in the onset of puberty, disorders in the estrous cycle, and infertility. Moreover, the animals exposed to phenobarbital in utero showed altered concentrations of sex steroids, gonadotrophic hormones, and estrogen receptors. These findings suggest that phenobarbital treatment during prenatal development can produce permanent alterations in sexual maturation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gupta, C -- Sonawane, B R -- Yaffe, S J -- Shapiro, B H -- New York, N.Y. -- Science. 1980 May 2;208(4443):508-10.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7367874" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Estrus/drug effects ; Female ; Luteinizing Hormone/blood ; Maternal-Fetal Exchange ; Phenobarbital/*adverse effects ; Pregnancy ; Rats ; Receptors, Estrogen/drug effects ; Reproduction/*drug effects ; Sexual Maturation/drug effects
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 29
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    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-06-06
    Beschreibung: Premature separation of rat pups from their dams greatly increases their susceptibility to restraint-induced gastric erosions. When prematurely separated female rats grow to adulthood and mate with stock males, their normally reared F 1 progeny also have increased susceptibility to restraint-induced erosions. Cross-fostering studies show that prenatal rather than postnatal factors transmit this susceptibility to the F 1 progeny.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Skolnick, N J -- Ackerman, S H -- Hofer, M A -- Weiner, H -- New York, N.Y. -- Science. 1980 Jun 6;208(4448):1161-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7189606" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Animals, Suckling/physiology ; Female ; Humans ; Maternal Behavior ; Pregnancy ; Rats ; Restraint, Physical ; Stomach Ulcer/embryology/etiology/*genetics ; Stress, Psychological/*complications
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 30
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-07-18
    Beschreibung: The teratogenicity of alcohol has been demonstrated in humans through clinical studies, behavioral studies, and epidemiologic studies, and in animals through controlled laboratory experiments. In humans exposed to alcohol during gestation the effects can range from fetal alcohol syndrome in some offspring of chronic alcoholic women to reduced average birth weight in offspring of women reporting an average consumption of two to three drinks or more per day. The behavioral effects of such exposure may range from mental retardation in children with fetal alcohol syndrome to milder developmental and behavioral effects in infants born to social drinkers. In animals, exposure to alcohol in utero may result in death, malformation, and growth deficiency as well as behavioral and developmental abnormalities. The mechanisms of impairment and related risk factors are yet to be elucidated.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Streissguth, A P -- Landesman-Dwyer, S -- Martin, J C -- Smith, D W -- New York, N.Y. -- Science. 1980 Jul 18;209(4454):353-61.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6992275" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Abnormalities, Drug-Induced ; Alcohol Drinking ; Brain/pathology ; Disease Models, Animal ; *Ethanol/pharmacology ; Female ; Fetal Alcohol Spectrum Disorders/*physiopathology ; Humans ; Hyperkinesis/chemically induced ; Infant, Low Birth Weight ; Infant, Newborn ; Pregnancy ; Sucking Behavior/drug effects ; *Teratogens
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 31
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-05-16
    Beschreibung: Infant rat pups, fed through intragastric cannulas from postnatal day 4 through day 18, showed a 19 percent reduction in total brain weight when ethanol was included in their diet on days 4 through 7. This reduction in brain weight occurred even though body growth in the experimental rats was equal to that of their littermate controls. The ethanol-exposed animals were markedly hypoactive during the period of drug administration, then displayed gross body tremors for 3 to 5 days. Throughout the study, the animals treated with ethanol had poor motor coordination and were hyperresponsive. These brain and behavioral effects appear similar to those seen in fetal alcohol syndrome.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Diaz, J -- Samson, H H -- New York, N.Y. -- Science. 1980 May 16;208(4445):751-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7189297" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Age Factors ; Animals ; Animals, Newborn ; Behavior, Animal/physiology ; Brain/anatomy & histology/drug effects/*growth & development ; Cerebellum/growth & development ; Disease Models, Animal ; Ethanol/*pharmacology ; Female ; Fetal Alcohol Spectrum Disorders/*embryology ; Organ Size ; Pregnancy ; Rats
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 32
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-11-28
    Beschreibung: Down regulation of the insulin receptor of primary cultures of rat hepatocytes occurs in the presence of insulin and several agents with insulin-like activity, which act through or distal to the insulin receptor. These findings indicate that the interaction of insulin with its specific binding site is not in itself sufficient to down-regulate this receptor and that one or more steps subsequent to this interaction are necessary. Thus, down regulation may be a complex biological response to insulin, and if a cell were resistant to this effect of insulin, our data may explain how target cells from a patient or animal can have a normal number of receptors in the presence of increased concentrations of circulating insulin.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Caro, J F -- Amatruda, J M -- AM 00366/AM/NIADDK NIH HHS/ -- AM 20948/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1980 Nov 28;210(4473):1029-31.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7001632" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Insulin/metabolism ; Kinetics ; Liver/*metabolism ; Male ; Peroxides/pharmacology ; Rats ; Receptor, Insulin/drug effects/immunology/*metabolism ; Spermine/pharmacology ; Vitamin K/pharmacology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 33
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-09-12
    Beschreibung: Specific binding of 1 alpha,25-dihydroxyvitamin D(3) was found in nuclear and cytosol fractions of the bovine pituitary. For nuclear binding. the dissociation constant was 0.1 namomole per liter, and maximum binding was 104 femtomoles per milligram of protein. In competition studies, 25-hydroxyvitamin D(3) was 300 times weaker than 1 alpha,25-dihydroxyvitamin D(3). The existence of high-affinity sites supports a physiologic role for 1 alpha,25-dihydroxyvitamin D(3) in the pituitary.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gelbard, H A -- Stern, P H -- U'Prichard, D C -- New York, N.Y. -- Science. 1980 Sep 12;209(4462):1247-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6250221" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Brain/metabolism ; Cattle ; Cell Nucleus/metabolism ; Cholecalciferol/*metabolism ; Cytosol/metabolism ; Dihydroxycholecalciferols/*metabolism ; Hydroxycholecalciferols/*metabolism ; Kinetics ; Pituitary Gland/*metabolism/ultrastructure ; Receptors, Drug/*metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 34
    Publikationsdatum: 1980-06-13
    Beschreibung: Injection of iodine-131-labeled goat immunoglobulin G antibody to human chorionic gonadotropin (hCG) into patients with hCG-secreting trophoblastic and germinal tumors permitted tumor detection and location by external gamma-ray scintigraphy. Excision of one of the metastatic tumors located by this method indicated a tumor/nontumor ration of 39.29. The method appears to offer a new clinical tool for precisely locating hCG-producing tumors in the body, even when tumor identification by other clinical methods has failed.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Goldenberg, D M -- Kim, E E -- DeLand, F H -- van Nagell, J R Jr -- Javadpour, N -- New York, N.Y. -- Science. 1980 Jun 13;208(4449):1284-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7375942" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Antibodies/*administration & dosage ; Choriocarcinoma/*radionuclide imaging ; Chorionic Gonadotropin/*immunology ; Female ; Humans ; Hydatidiform Mole/*radionuclide imaging ; Immunoglobulin G/administration & dosage ; Pregnancy ; Radioimmunoassay/methods ; Radionuclide Imaging/methods ; Teratoma/*radionuclide imaging ; Uterine Neoplasms/*radionuclide imaging
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 35
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    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-01-04
    Beschreibung: Acid extract of human placental tissue contain, by both radioimmunoassay and radioreceptor assay, beta-endrophin-like material. Half of this material will not go through a 5000-dalton filter and on Sephadex G-200 has a molecular size between 25,00 and 50,000 daltons. Of the material going through a 5000-dalton ultrafilter, 80 percent is excluded on Sephadex G-25 and held back, very slightly, on Bio-Rad P6, indicating a molecular size of approximately 4500 to 4800 daltons. Thus, placenta appears to have macromolecular precursors from which a beta-endorphin-like material is released, with a size approximately 12 amino acids longer than half of the pituitary hormone.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Houck, J C -- Kimball, C -- Chang, C -- Pedigo, N W -- Yamamura, H I -- New York, N.Y. -- Science. 1980 Jan 4;207(4426):78-80.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7350643" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Endorphins/*metabolism ; Female ; Humans ; Molecular Weight ; Placenta/*metabolism ; Pregnancy ; Radioimmunoassay ; Radioligand Assay
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 36
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-01-18
    Beschreibung: The synthesis of a placental luteinizing hormone-releasing factor (pLRF), which is immunologically, physiochemically, and biologically indistinguishable from synthetic LRF, was demonstrated. The incorporation of 3H-labeled leucine by human placental tissue in vitro into pLRF was determined by purification on carboxymethyl-cellulose and specific immunoprecipitation of the 3H-labeled pLRF. The specific activity of the pLRF released into the medium increased 100-fold from day 1 to day 2 of culture and attained a concentration of 2.84 microcuries per microgram. These data indicate that the pLRF that was released initially was endogenous, whereas that released subsequently reflected synthesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Khodr, G S -- Siler-Khodr, T M -- New York, N.Y. -- Science. 1980 Jan 18;207(4428):315-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6985750" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Culture Techniques ; Female ; Gonadotropin-Releasing Hormone/biosynthesis/immunology/*metabolism ; *Hormones ; Humans ; Placenta/*metabolism ; Pregnancy
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 37
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    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-02-15
    Beschreibung: Mothers among !Kung hunter-gatherers nurse briefly and frequently, with brief intervals between nursing bouts (mean +/- standard error, 13.19 +/- 1.28 minutes). The low levels of 17 beta-estradiol and progesterone in the serum of the mother are correlated with infant's age and with interbout interval, but not with total nursing time. Maternal gonadal function is apparently suppressed by a timing-dependent, prolactin-mediated effect of breast stimulation. Interbout interval may be a key variable in lactation infertility. If so, it solves the puzzle of !Kung birth spacing.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Konner, M -- Worthman, C -- New York, N.Y. -- Science. 1980 Feb 15;207(4432):788-91.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7352291" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amenorrhea/*etiology ; *Birth Intervals ; Botswana ; Estradiol/blood ; Female ; Humans ; *Lactation ; *Maternal Behavior ; Menstruation ; Namibia ; *Postpartum Period ; Pregnancy ; Progesterone/blood
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 38
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    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-02-29
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Malinak, L R -- Kaufman, R H -- Spjut, H J -- New York, N.Y. -- Science. 1980 Feb 29;207(4434):1008.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7352297" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Clomiphene/*pharmacology ; Female ; Metaplasia/chemically induced ; Pregnancy ; Pregnancy, Animal/*drug effects ; Rats ; Uterus/*drug effects/pathology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 39
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-01-11
    Beschreibung: The measure of time was used as an additional parameter on an existing flow cytometer to study the kinetics of enzyme activities and cell-stain interactions. By correlating all fluorescent signals from single cells with time, the dynamics of a reaction can be followed for several minutes. This advanced application of flow cytometry is easily implemented and can be incorporated into any flow cytometer that has two-parameter analysis capability.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Martin, J C -- Swartzendruber, D E -- New York, N.Y. -- Science. 1980 Jan 11;207(4427):199-201.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6153131" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Cell Line ; Cells, Cultured/enzymology ; Computers ; Cricetinae ; *Cytological Techniques ; DNA/metabolism ; Esterases/metabolism ; Kinetics ; Mice ; Spectrometry, Fluorescence/methods ; Staining and Labeling
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 40
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    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-08-15
    Beschreibung: Urine produced by wild female house mice, living in high- and low-density populations and confined to areas within a highway cloverleaf, was tested for its ability to delay puberty in juvenile female mice. Only urine collected from females in the dense population at its maximum density delayed puberty in test females. Urine collected when the population was less dense, or from a population that remained sparse, failed to delay puberty. These results suggest that a urinary factor present at high densities may delay puberty and thus help to slow further population growth.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Massey, A -- Vandenbergh, J G -- New York, N.Y. -- Science. 1980 Aug 15;209(4458):821-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7190728" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Animals, Wild/physiology ; Crowding ; Estrus ; Female ; Mice/*physiology/urine ; Pheromones/*urine ; *Population Density ; Pregnancy ; *Sexual Maturation
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 41
    Publikationsdatum: 1980-08-01
    Beschreibung: At high oscillation frequencies (4 to 30 hertz), effective alveolar ventilation can be achieved with tidal volumes much smaller than the anatomic dead space. An explanation of this phenomenon is given in terms of the combined effects of diffusion and convection and in terms of data consistent with the hypothesis. Theory and experimental results both show that the significant variable determining the effectiveness of gas exchange is the amplitude of the oscillatory flow rate independent of the individual values of frequency and stroke volume.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Slutsky, A S -- Drazen, F M -- Ingram, R H Jr -- Kamm, R D -- Shapiro, A H -- Fredberg, J J -- Loring, S H -- Lehr, J -- New York, N.Y. -- Science. 1980 Aug 1;209(4456):609-71.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6771872" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Carbon Dioxide/metabolism ; Diffusion ; Dogs ; Kinetics ; Mathematics ; Oscillometry ; Pulmonary Alveoli/*physiology ; *Respiration
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 42
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-08-08
    Beschreibung: The calcium ionophore A23187 brings about an influx of calcium and uptake of sucrose by endocytosis in Amoeba proteus. The amount of endocytotic sucrose uptake elicited by the ionophore depends upon the external calcium ion concentration. Calcium ion movements may serve to couple the surface phase of endocytosis with cytoplasmic uptake of the endocytotic inducer.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Prusch, R D -- New York, N.Y. -- Science. 1980 Aug 8;209(4457):691-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6771873" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amoeba/drug effects/*metabolism ; Animals ; Anti-Bacterial Agents/*pharmacology ; Biological Transport/drug effects ; Calcimycin/*pharmacology ; Calcium/metabolism ; Endocytosis/*drug effects ; Kinetics ; Sucrose/*metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 43
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-11-28
    Beschreibung: A hydranencephalic infant lacking cerebral hemispheres and a normal twin were tested for associative learning. After repeated trials in which two stimuli were temporally paired, test trials were given in which the second stimulus was omitted. Cardiac orienting responses to stimulus omission indicated that learning had taken place in both infants.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tuber, D S -- Berntson, G G -- Bachman, D S -- Allen, J N -- New York, N.Y. -- Science. 1980 Nov 28;210(4473):1035-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7192015" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Anencephaly/*physiopathology ; Association/*physiology ; Behavior/physiology ; Brain/physiology ; Brain Stem/physiology ; Female ; Heart Rate ; Humans ; Hydranencephaly/*physiopathology ; Infant ; Infant, Newborn ; Infant, Premature/*psychology ; Male ; Pregnancy ; Twins, Dizygotic
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 44
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-06-27
    Beschreibung: Three Siamese cats were found to have a progressive neurological disease that became obvious when they were 4 to 5 months of age. Their brains contained an excess of GM2 and GM3 gangliosides, and their livers a nine- to tenfold excess of sphingomyelin and cholesterol. A total deficiency of lysosomal (pH 5.0) sphingomyelinase was found in the leukocytes, liver, and brain of the cats, although the activity of the microsomal (pH 7.4, magnesium-dependent) sphingomyelinase was normal in brain. These cats appear to have a genetic disease identical to Niemann-Pick disease type A.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wenger, D A -- Sattler, M -- Kudoh, T -- Snyder, S P -- Kingston, R S -- New York, N.Y. -- Science. 1980 Jun 27;208(4451):1471-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7189903" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Brain/enzymology ; Brain Chemistry ; Cat Diseases/enzymology/*genetics ; Cats ; *Disease Models, Animal ; Gangliosides/analysis ; Humans ; Kinetics ; Liver/analysis ; Niemann-Pick Diseases/enzymology/*genetics ; Phospholipids/analysis ; Sphingomyelin Phosphodiesterase/analysis
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 45
    Publikationsdatum: 1980-05-09
    Beschreibung: Mice produce litters containing many pups, and the female fetuses that develop between male fetuses have significantly higher concentrations of the male sex steroid testosterone in both their blood and amniotic fluid than do females that develop between other female fetuses. These two types of females differ during later life in many sexually related characteristics. Thus, individual variation in sexual characteristics of adult female mice may be traceable to differential exposure to testosterone during prenatal development because of intrauterine proximity to male fetuses.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉vom Saal, F S -- Bronson, F H -- New York, N.Y. -- Science. 1980 May 9;208(4444):597-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7367881" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Age Factors ; Amniotic Fluid/*metabolism ; Animals ; Estradiol/blood ; Estrus ; Female ; Fetal Blood/*metabolism ; Male ; Mice/*embryology ; Pregnancy ; Progesterone/blood ; *Sex Differentiation ; Sex Ratio ; Sexual Behavior, Animal/*physiology ; Testosterone/*blood
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 46
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    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-01-18
    Beschreibung: Titers of testosterone in plasma were determined by radioimmunoassay in male rat fetuses of stressed and control mothers on days 17, 18, 19, 21, and 23 (the day of birth) after conception. In fetuses of stressed mothers, testosterone concentrations were highest on day 17, declined on days 18 and 19, and then remained unchanged. In the control fetuses, testosterone increased from relatively low concentrations on day 17 to the highest amounts on days 18 and 19, and then declined. Thus, the persistence of feminine and impaired masculine sexual behavior in male offspring of stressed mothers could be due to the absence of a surge of circulating testosterone during days 18 and 19 after conception, a period postulated to be critical in the development of the central nervous system in the rat.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ward, I L -- Weisz, J -- New York, N.Y. -- Science. 1980 Jan 18;207(4428):328-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7188648" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Disorders of Sex Development/embryology ; Female ; Fetal Blood/*analysis ; Gestational Age ; Humans ; Male ; Pregnancy ; Rats ; *Sex Differentiation ; Stress, Psychological/blood/*physiopathology ; Testosterone/*blood
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 47
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-08-01
    Beschreibung: Monozygotic twins developed from cultured murine blastocysts at the ratio of approximately 1:100. The locus at which the denuded blastocysts attached to the culture dish was usually a random section of their mural trophoblasts, in which case single egg cylinders developed unilaterally. However, in those few blastocysts attaching with their antipolar mural trophoblasts, the inner cell mass became subdivided into two parts because of restrictions imposed on its growth by the apically situated polar trophoblasts and the plastic substrate. Each subdivision apparently incorporated totipotent cells, resulting in the bilateral formation of two egg cylinders sharing the same ectoplacental cone.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hsu, Y C -- Gonda, M A -- New York, N.Y. -- Science. 1980 Aug 1;209(4456):605-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7190325" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Blastocyst/physiology ; Culture Media ; Embryo, Mammalian/*physiology ; Female ; Fertilization in Vitro ; Mice ; Pregnancy ; *Twins ; *Twins, Monozygotic
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 48
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-01-11
    Beschreibung: Characteristic potentiation of rat locomotion responses and acoustic startle reflexes that normally appear in the third postnatal week was absent in rats exposed to diazepam during the third week of gestation. Loss of these behaviors suggests a long-term effect that may result from changes in cellular development. Tissue undergoing neuronal differentation may be especially sensitive to drugs that act on the central nervous system, and the period in which differentiation occurs is perhaps critical for the induction of changes that are later expressed as altered behavior.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kellogg, C -- Tervo, D -- Ison, J -- Parisi, T -- Miller, R K -- New York, N.Y. -- Science. 1980 Jan 11;207(4427):205-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7350658" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Auditory Perception/drug effects ; Behavior, Animal/*drug effects ; Diazepam/*pharmacology ; Female ; Fetus/*drug effects ; Gestational Age ; Motor Activity/drug effects ; Pregnancy ; Rats ; Reflex, Startle/drug effects ; Sound
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 49
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-10-10
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kolata, G B -- New York, N.Y. -- Science. 1980 Oct 10;210(4466):176-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7414329" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): *Cesarean Section/standards/utilization ; Female ; Humans ; National Institutes of Health (U.S.) ; Pregnancy ; United States
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 50
    Publikationsdatum: 1980-11-21
    Beschreibung: Exposure of pregnant rats to the anesthetic nitrous oxide on the ninth day of gestation causes fetal resorption, skeletal anomalies, and macroscopic lesions including encephalocele, anophthalmia, microphthalmia, and gastroschisis. The inert gas xenon, which has anesthetic properties similar to those of nitrous oxide, does not cause teratogenic effects under the same experimental conditions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lane, G A -- Nahrwold, M L -- Tait, A R -- Taylor-Busch, M -- Cohen, P J -- Beaudoin, A R -- New York, N.Y. -- Science. 1980 Nov 21;210(4472):899-901.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7434002" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Anesthetics/*adverse effects ; Animals ; Female ; Nitrous Oxide/*toxicity ; Pregnancy ; Rats ; Structure-Activity Relationship ; *Teratogens ; Xenon/*toxicity
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 51
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-03-21
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lechat, M F -- Borlee, I -- Bouckaert, A -- Misson, C -- New York, N.Y. -- Science. 1980 Mar 21;207(4437):1296-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7355288" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Abnormalities, Drug-Induced/*etiology ; Caffeine/*adverse effects ; Female ; Humans ; Infant, Newborn ; Pregnancy ; *Teratogens
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 52
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-08-08
    Beschreibung: Calcium ion-selective microelectrodes made with Simon's neutral carrier were used to measure simultaneously sarcoplasmic Ca2+ activity (aiCa) and resting tension (Tr) of rabbit ventricular muscle during reduction and restoration of external sodium ion concentration, [Na]0. Under the same experimental conditions the change in contractile tension (Ta) also measured. In resting muscle the aiCa was 38 +/- 17 nanomolar (mean +/- standard deviation; N = 10). The reduction of [Na]O from 153 to 20 millimolar led to about a threefold increase in aiCa with parallel increases in Tr and Ta. The time course of the change in aiCa was similar to that of the changes in Tr and Ta. The results are consistent with an important role of the sodium-calcium exchange system for regulating sarcoplasmic Ca2+ activity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lee, C O -- Uhm, D Y -- Dresdner, K -- New York, N.Y. -- Science. 1980 Aug 8;209(4457):699-701.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7394527" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Biological Transport/drug effects ; Calcium/*metabolism ; Heart Ventricles/metabolism ; Kinetics ; Membrane Potentials/drug effects ; Microelectrodes ; Myocardium/*metabolism ; Rabbits ; Sarcoplasmic Reticulum/drug effects/*metabolism ; Sodium/*metabolism/pharmacology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 53
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-10-31
    Beschreibung: The turnover rate of acetylcholine receptors at neuromuscular junctions in mice increases progressively after denervation and, after 15 days, reaches a half-time of 30 z 5 hours. Denervation thus causes the clustered junctional acetylcholine receptors to assume the rapid turnover characteristic of extrajunctional receptors before innervation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Levitt, T A -- Loring, R H -- Salpeter, M M -- NS 09315-10/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1980 Oct 31;210(4469):550-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7423205" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Bungarotoxins/metabolism ; Kinetics ; Mice ; Motor Neurons/*physiology ; Muscle Denervation ; Neuromuscular Junction/*metabolism ; Receptors, Cholinergic/*metabolism ; Receptors, Nicotinic/metabolism
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    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 54
    Publikationsdatum: 1980-02-15
    Beschreibung: Isozymes of lactate dehydrogenase from heart and muscle of Atlantic hagfish show less functional divergence than those from other fishes and higher vertebrates. The enzyme from hagfish heart (B4) displays a higher Michaelis constant for pyruvate and lower substrate inhibition at moderate pyruvate concentrations than heart isozymes from other species. These properties support the hypothesis that the ancestral vertebrate lactate dehydrogenase was a muscle (A4)-type enzyme and also suggest a role for the B4 enzyme in the unusual physiology of hagfish cardiac tissue which functions under sustained hypoxic conditions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sidell, B D -- Beland, K F -- New York, N.Y. -- Science. 1980 Feb 15;207(4432):769-70.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7352286" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Anaerobiosis ; Animals ; *Biological Evolution ; Energy Metabolism ; Fishes/genetics/*physiology ; Genes ; Isoenzymes ; Kinetics ; L-Lactate Dehydrogenase/*genetics/metabolism ; Muscles/*enzymology ; Myocardium/enzymology ; Pyruvates/metabolism
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    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 55
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-06-27
    Beschreibung: Sarcolemmal membrane vesicles isolated from canine ventricular tissue accumulate calcium through the sodium-calcium exchange system when an outwardly directed sodium gradient is generated across the vesicle membrane. Moreover, calcium uptake under these conditions is accompanied by the transient accumulation of the lipophilic cation tetraphenylphosphonium. Since the distribution of tetraphenylphosphonium across biological membranes reflects the magnitude and direction of transmembrane potential differences and the characteristics of the transient accumulation of this cation closely resemble those of sodium-calcium exchange activity, it is concluded that a membrane potential, interior negative, is produced during calcium accumulation through the exchange system. Thus, the operation of the sodium-calcium exchange system generates a current in cardiac membrane vesicles, suggesting that three or more sodium ions exchange for each calcium ion.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Reeves, J P -- Sutko, J L -- New York, N.Y. -- Science. 1980 Jun 27;208(4451):1461-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7384788" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Biological Transport, Active/drug effects ; Calcium/*metabolism ; Carbonyl Cyanide m-Chlorophenyl Hydrazone/pharmacology ; Cell Membrane/drug effects/*metabolism ; Heart/*physiology ; Kinetics ; Membrane Potentials/drug effects ; Myocardium/*metabolism ; Onium Compounds/metabolism ; *Organophosphorus Compounds ; Sodium/*metabolism ; Valinomycin/pharmacology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 56
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-07-25
    Beschreibung: The chemotaxis of leukocytes appears to be initiated by the binding of chemotactic factors to the surface of these cells. N-Formylated peptides induce chemotaxis and lysosomal enzyme secretion of leukocytes; because these peptides are available in a purified radiolabeled form, they have been useful in the characterization of receptors for chemotactic factors. Equine polymorphonuclear leukocytes secrete lysosomal enzymes but do not exhibit chemotaxis in respone to the N-formylated peptides, even though they have a high-affinity cell surface receptor for these agents. The specificity of the equine receptor resembles the specificity of the receptor on chemotactically responsive leukocytes from other species. Equine polymorphonuclear leukocytes may thus be an excellent model for the study of the events that lead to a biological response following receptor occupancy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Snyderman, R -- Pike, M C -- New York, N.Y. -- Science. 1980 Jul 25;209(4455):493-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6248959" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Chemotaxis ; Horses ; Kinetics ; Leukocytes/*physiology/secretion ; Oligopeptides/blood/*physiology ; Receptors, Cell Surface/*physiology ; Receptors, Formyl Peptide ; Structure-Activity Relationship
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 57
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-08-29
    Beschreibung: Electrophysiological field potentials from hippocampal slices of rat brain show sex-linked differences in response to 1 X 10(-10)M concentrations of estradiol and testosterone added to the incubation medium. Slices from male rats show increased excitability to estradiol and not to testosterone. Slices from female rats are not affected by estradiol, but slices from female rats in diestrus show increased excitability in response to testosterone whereas slices from females in proestrus show decreased excitability.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Teyler, T J -- Vardaris, R M -- Lewis, D -- Rawitch, A B -- New York, N.Y. -- Science. 1980 Aug 29;209(4460):1017-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7190730" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Action Potentials/drug effects ; Animals ; Biotransformation ; Diestrus ; Estradiol/metabolism/*pharmacology ; *Estrus ; Female ; Hippocampus/*drug effects ; Male ; Membrane Potentials/drug effects ; Pregnancy ; Proestrus ; Pyramidal Tracts/*drug effects ; Rats ; Sex Differentiation ; Testosterone/*pharmacology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 58
    Publikationsdatum: 1980-01-04
    Beschreibung: Cromolyn inhibited histamine release from mast cells that was induced by a classic secretagogue and correspondingly increased incorporation of radioactive phosphate into a 78,000-dalton protein. These effects on histamine secretion and on protein phosphorylation were rapid in onset and both showed tachyphylaxis. Cromolyn may therefore act by altering the phosphorylation of a protein involved in the regulation of secretion.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Theoharides, T C -- Sieghart, W -- Greengard, P -- Douglas, W W -- New York, N.Y. -- Science. 1980 Jan 4;207(4426):80-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6153130" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Calcium/physiology ; Cromolyn Sodium/*pharmacology ; Histamine Release/*drug effects ; Kinetics ; Mast Cells/*drug effects/immunology/metabolism ; Molecular Weight ; Phosphoproteins/*metabolism ; Phosphorylation ; Rats ; p-Methoxy-N-methylphenethylamine/antagonists & inhibitors
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 59
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-07-11
    Beschreibung: The ratio of respiration to nitrogenase activity was measured in five species of actinorhizal root nodules and eight species of legume nodules. The two types of nodules could not be distinguished on the basis of this ratio; this evidence thus indicates that the energy cost of nitrogen fixation is similar for both.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tjepkema, J D -- Winship, L J -- New York, N.Y. -- Science. 1980 Jul 11;209(4453):279-81.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7384801" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Actinomycetales/metabolism ; Kinetics ; *Nitrogen Fixation ; Plants/*metabolism ; Rhizobium/metabolism ; Species Specificity
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 60
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1980-06-06
    Beschreibung: Specific cholecystokinin binding sites in particulate fractions of rat brain were measured with iodine 125-labeled Bolton-Hunter cholecystokinin, a cholecystokinin analog that has full biological activity. Binding was detected in brain regions known to contain immunoreactive cholecystokinin. Binding was saturable, reversible, of high affinity (dissociation constant, 1.7 x 10(-9) M), and was inhibited by cholecystokinin analogs but not by unrelated hormones.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Saito, A -- Sankaran, H -- Goldfine, I D -- Williams, J A -- New York, N.Y. -- Science. 1980 Jun 6;208(4448):1155-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6246582" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Binding, Competitive ; Brain/*metabolism ; Brain Mapping ; Cerebral Cortex/metabolism ; Cholecystokinin/*metabolism ; Gastrins/metabolism ; Kinetics ; Male ; Olfactory Bulb/metabolism ; Pancreas/metabolism ; Rats ; Receptors, Cell Surface/*metabolism
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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