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  • Rats  (916)
  • American Association for the Advancement of Science (AAAS)  (916)
  • Blackwell Publishing Ltd
  • 1980-1984  (692)
  • 1975-1979  (224)
  • 1925-1929
Collection
Publisher
  • American Association for the Advancement of Science (AAAS)  (916)
  • Blackwell Publishing Ltd
  • Springer  (20)
Years
Year
  • 1
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-02-24
    Description: Sulfhydryl reagents exert a profound influence on the monodeiodination of thyroxine to triiodothyronine by rat and sheep tissues in vitro. A marked dithiothreitol-induced increase in the monodeiodination by fetal sheep liver homogenates suggests that the characteristically low conversion in fetal tissues is related more to the status of sulfhydryl groups than to a deficiency of the monodeiodinating enzyme.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chopra, I J -- New York, N.Y. -- Science. 1978 Feb 24;199(4331):904-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/622575" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Dithiothreitol/pharmacology ; Female ; Fetus/*metabolism ; Liver/embryology/*metabolism ; Pregnancy ; Rats ; Sheep ; Sulfhydryl Compounds/*metabolism ; Sulfhydryl Reagents/pharmacology ; Thyroxine/*metabolism ; Triiodothyronine/*metabolism
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  • 2
    Publication Date: 1978-12-22
    Description: Long-term treatment of rats with clinically effective tricyclic antidepressant drugs induced a selective increase in the inhibitory response of forebrain neurons to serotonin applied by microiontophoresis. Long-term administration of some related drugs which lack antidepressant efficacy failed to induce such a change. The enhanced response to serotonin induced by the clinically active tricyclic drugs took 1 to 2 weeks to develop, a time course which correlates with the delayed onset of therapeutic effects in humans.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉de Montigny, C -- Aghajanian, G K -- New York, N.Y. -- Science. 1978 Dec 22;202(4374):1303-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/725608" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials/drug effects ; Animals ; Antidepressive Agents, Tricyclic/*pharmacology ; Decerebrate State ; Drug Synergism ; Geniculate Bodies/*drug effects ; Hippocampus/*drug effects ; Male ; Neural Inhibition/drug effects ; Norepinephrine/pharmacology ; Pyramidal Tracts/drug effects ; Rats ; Receptors, Serotonin/*drug effects ; Serotonin/*pharmacology ; gamma-Aminobutyric Acid/pharmacology
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  • 3
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-07-14
    Description: Inflatable pyloric cuffs and stomach tubes were implanted in rats. With the cuff inflated and a valve to limit intragastric pressure to that accompanying normal satiety, they drank only as much when they had been deprived of food for 12 hours as without inflation of the cuff. However, they overdrank with the cuff inflated when they had been water deprived for 12 hours. When 10 ml of milk was withdrawn from the stomach with the cuff inflated, compensatory drinking occurred. Further, compensatory drinking also occurred when milk escaped from the stomach into the duodenum. Satiety signals thus arise from the stomach.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Deutsch, J A -- Young, W G -- Kalogeris, T J -- New York, N.Y. -- Science. 1978 Jul 14;201(4351):165-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/663647" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Drinking Behavior/physiology ; Duodenum/physiology ; Food Deprivation ; Male ; Rats ; Satiation/*physiology ; Satiety Response/*physiology ; Stomach/*physiology
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  • 4
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-10-20
    Description: Crystals and other regular arrangements of nucleosome cores have been obtained and analyzed in the electron microscope. Two types of regular structures have been studied in detail, the nucleosome arcs and cylinders. The latter are composed of concentric cylindrical layers of intertwined right-handed helices of nucleosome cores. These studies lead to the following conclusions and concepts. The overall structure of the nucleosome core is a short, wedge-shaped cylinder measuring about 110 by 110 by 60 angstroms. Nucleosome cores interact primarily between top and bottom planes. Nucleosome cores exhibit large conformational variability. A pivot allowing two degrees of rotational freedom is postulated in the region of the 70th base pair to account for this property of the nucleosome.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dubochet, J -- Noll, M -- New York, N.Y. -- Science. 1978 Oct 20;202(4365):280-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/694532" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chromatin/*ultrastructure ; Crystallography ; Macromolecular Substances ; Micrococcal Nuclease/metabolism ; Microscopy, Electron/methods ; Rats
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  • 5
    Publication Date: 1978-07-07
    Description: The density but not the affinity of beta-adrenergic receptors declined significantly with age in rat pineal gland, corpus striatum, and cerebellum, as determined by the binding of tritiated dihydroalprenolol. Exposing rats to light for 12 hours increased the binding of this radioligand in 3-month-old but not in 24-month-old rats. The reduced responsiveness to catecholamines seen in aging may be due to a decrease in the number of beta-adrenergic receptors which, in turn, may be caused by an impaired capacity of receptors in aged animals to adapt to changes in adrenergic neuronal input.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Greenberg, L H -- Weiss, B -- New York, N.Y. -- Science. 1978 Jul 7;201(4350):61-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/208145" target="_blank"〉PubMed〈/a〉
    Keywords: *Aging ; Alprenolol/analogs & derivatives/metabolism ; Animals ; Brain/*metabolism ; Cerebellum/metabolism ; Circadian Rhythm ; Corpus Striatum/metabolism ; Kinetics ; Light ; Male ; Neuroglia/metabolism ; Pineal Gland/*metabolism ; Rats ; Receptors, Adrenergic/*metabolism ; Receptors, Adrenergic, beta/*metabolism
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  • 6
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-12-08
    Description: The relative frequency of appearance of discontinuities in the postsynaptic thickening, or perforations in the subsynaptic plate, increased with age and experience. Rats reared from weaning in complex or social environments had a significantly higher proportion of occipital cortical synapses with perforations than did rats reared in isolation. In addition, the relative frequency of these perforations more than tripled between 10 and 60 days of age. Shifts in the frequency of perforations can occur independently of changes in the size of synpases. This result suggests a new potential mechanism of synaptic plasticity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Greenough, W T -- West, R W -- DeVoogd, T J -- New York, N.Y. -- Science. 1978 Dec 8;202(4372):1096-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/715459" target="_blank"〉PubMed〈/a〉
    Keywords: *Aging ; Animals ; Cerebral Cortex/ultrastructure ; Environment ; Male ; Occipital Lobe/*ultrastructure ; Rats ; Synapses/ultrastructure ; Synaptic Membranes/*ultrastructure
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  • 7
    Publication Date: 1978-07-28
    Description: Rat pups that are separated early from their mothers, at postnatal day 15, become hypothermic when subjected to physical restraint on postnatal day 30. Restraint of separated pups also elicits an unusually high incidence of gastric erosions, as well as insomnia and an increase in quiet wakefulness. If hypothermia during restraint is prevented, neither the erosions nor the behavioral responses occur. Rat pups separated at the customary age (postnatal day 22) do not become hypothermic during restraint, and the restraint of such pups is not associated with either gastric erosion or insomnia.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ackerman, S H -- Hofer, M A -- Weiner, H -- New York, N.Y. -- Science. 1978 Jul 28;201(4353):373-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/566471" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Newborn/physiology ; Arousal/physiology ; Behavior, Animal/physiology ; *Body Temperature Regulation ; Food Deprivation ; Humans ; *Maternal Deprivation ; Rats ; Restraint, Physical ; Sleep/physiology ; Stomach Ulcer/*etiology ; *Stress, Psychological/physiology ; Wakefulness/physiology
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  • 8
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-07-21
    Description: Taste substances applied to the oral cavity result in either ingestion or rejection, each with a characteristic muscular response pattern. These responses are the same in decerebrate and intact rats; the caudal brainstem appears to be the neural substrate of ingestion and rejection responses. The experiment determined whether decerebrates can alter these discriminative responses as a function of food deprivation or toxicosis. Food-deprived decerebrate rats, like intact ones, ingested a taste substance they had rejected when sated. However, these same decerebrates, in contrast to controls, neither rejected nor decreased ingestive reactions to a novel taste after that taste had been repeatedly paired with lithium chloride-induced illness. Although the forebrain may be important for integrating ingestion, some aspects of this control seem to be represented in caudal brain areas.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Grill, H J -- Norgren, R -- New York, N.Y. -- Science. 1978 Jul 21;201(4352):267-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/663655" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arousal/physiology ; Association Learning/*physiology ; Brain Stem/*physiology ; *Decerebrate State ; Feeding Behavior/*physiology ; Food Deprivation ; Hypothalamus/physiology ; Learning/*physiology ; Lithium ; Rats ; Satiation/physiology ; Sucrose ; Taste/physiology
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  • 9
    Publication Date: 1978-04-07
    Description: Androgen binding protein, a secretory product of seminiferous tubules, was isolated by means of affinity chromatography. A radioimmunoassay was developed and used to identify androgen binding protein in rat plasma. The ability to measure a testicular protein in blood provides a new method for investigation of seminiferous tubular physiology.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gunsalus, G L -- Musto, N A -- Bardin, W -- New York, N.Y. -- Science. 1978 Apr 7;200(4337):65-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/635573" target="_blank"〉PubMed〈/a〉
    Keywords: Androgens/metabolism ; Animals ; Blood-Testis Barrier ; Carrier Proteins/*blood/metabolism ; Castration ; Male ; Molecular Weight ; Radioimmunoassay/methods ; Rats ; Seminiferous Tubules/*metabolism ; Testis/*metabolism ; Testosterone/pharmacology
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  • 10
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-01-27
    Description: Electron microscopic evidence of early atherogenic changes in the aorta and coronary arteries was obtained in normal fed, conscious, unrestrained rats receiving electrical stimulation in the lateral hypothalamus for periods of up to 62 days. Hypertension and hypercholesterolemia were not etiologic factors. In view of recent observations concerning neuropsychological mechanisms in human ischemic heart disease, the findings raise the possibility that the human central nervous system has a role in the development of atherosclerotic lesions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gutstein, W H -- Harrison, J -- Parl, F -- Ku, G -- Avtable, M -- New York, N.Y. -- Science. 1978 Jan 27;199(4327):449-51.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/619468" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Aorta/pathology ; Arteriosclerosis/*etiology/pathology/physiopathology ; Blood Pressure ; Cholesterol/blood ; Coronary Vessels/pathology ; *Disease Models, Animal ; Electric Stimulation ; Hypothalamus/*physiopathology ; Male ; Rats ; Stress, Physiological/*complications
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  • 11
    Publication Date: 1978-11-03
    Description: Microinjections of the excitatory neurotoxin kainic acid into the lateral hypothalamus of rats produced a period aphagia and adipsia. Kainate-treated rats displayed transient motor effects during the first hours after the injection but did not show the persisting sensory-motor and arousal disturbances typically observed in animals with electrolytic lesions in this part of the hypothalamus. Histological examination revealed a significant reduction in the number of nerve cell bodies in the lateral hypothalamus. Silver-stained material indicated no evidence of damage to fiber systems passing through the affected region. Assays of dopamine in hypothalamus, striatum, and telencephalon did not indicate significant differences between experimental and control animals. These results are in agreement with recent reports of the anatomical and biochemical effects of intracerebral kainic acid injections and suggest that the observed effect on feeding behavior is related to the destruction of neurons in the lateral hypothalamus.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Grossman, S P -- Dacey, D -- Halaris, A E -- Collier, T -- Routtenberg, A -- New York, N.Y. -- Science. 1978 Nov 3;202(4367):537-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/705344" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Drinking Behavior/drug effects/*physiology ; Feeding Behavior/drug effects/*physiology ; Hypothalamus/cytology/drug effects/*physiology ; Kainic Acid/pharmacology ; Male ; Motor Activity/drug effects ; Rats ; Thalamic Nuclei/drug effects
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  • 12
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-11-03
    Description: Pigment epithelial cells in culture retain their ability to phagocytize rod outer segments. These cells phagocytize rod outer segments isolated from light-adapted rats, or from dark-adapted rats killed after the time at which the lights would normally be turned on. However, they phagocytize for fewer rod outer segments prepared in the dark from the retinas of rats killed before the onset of the normal light cycle. Phagocytosis of dark rod outer segments is variable, but that of light outer segments is reproducible. It is postulated that the effect of light is to synchronize the chemical events that occur at the surface of the rods to prepare them for phagocytosis. These processes also occur in the dark, but more slowly and irregularly than in the light.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hall, M O -- New York, N.Y. -- Science. 1978 Nov 3;202(4367):526-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/568310" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Culture Techniques ; Dark Adaptation ; Energy Metabolism ; Light ; Phagocytosis ; Photoreceptor Cells/*physiology ; Pigment Epithelium of Eye/*physiology/ultrastructure ; Rats
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  • 13
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-04-21
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hayes, R L -- Mayer, D J -- New York, N.Y. -- Science. 1978 Apr 21;200(4339):343-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/635595" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Behavior, Animal/physiology ; Conditioning (Psychology)/*physiology ; *Drug Tolerance ; Morphine/*pharmacology ; Rats
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  • 14
    Publication Date: 1978-05-05
    Description: The intraventricular injection of methionine-enkephalin (50 to 100 micrograms) or [d-Ala2]-methionine-enkephalinamide (1.5 to 12 micrograms), a synthetic enkephalin analog resistant to enzyme degradation, caused a marked dose-dependent increase in dihydroxyphenylacetic acid and homovanillic acid concentrations in the rat striatum. The [d-Ala2] analog increased the accumulation of dopa in the striatum after aromatic amino acid decarboxylase inhibition, indicating that it increased dopamine synthesis. At the highest doses used both enkephalins failed to modify brain serotonin metabolism. The monolateral microinjection of the [d-Ala2]] analog (3 to 6 micrograms) into the caudate nucleus increased the concentration of dihydroxyphenylacetic acid in the injected side, whereas bilateral injection increased the concentration of this compound in both caudate nuclei and caused catalepsy. The stimulant effect of the [d-Ala2] analog on dopamine synthesis in the striatum persisted after destruction of striatal postsynaptic dopamine receptors with kainic acid. The biochemical and behavioral effects of enkephalins were prevented by naloxone, a specific narcotic antagonist. The results indicate that enkephalins stimulate dopamine synthesis by an action on opioid receptors localized on dopaminergic nerve terminals.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Biggio, G -- Casu, M -- Corda, M G -- Di Bello, C -- Gessa, G L -- New York, N.Y. -- Science. 1978 May 5;200(4341):552-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/205949" target="_blank"〉PubMed〈/a〉
    Keywords: 3,4-Dihydroxyphenylacetic Acid/metabolism ; Animals ; Caudate Nucleus/*metabolism ; Dopamine/*biosynthesis ; Endorphins/*pharmacology ; Enkephalins/antagonists & inhibitors/*pharmacology ; Homovanillic Acid/metabolism ; Kainic Acid/pharmacology ; Male ; Naloxone/pharmacology ; Rats ; Receptors, Dopamine/drug effects ; Receptors, Opioid/drug effects
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  • 15
    Publication Date: 1978-06-23
    Description: In rats after portacaval anastomosis (an animal model of chronic liver disease), transport of tryptophan and other members of the large neutral amino acid group from blood to brain was markedly enhanced. Increased transport activity was apparently restricted to the neutral amino acid transport system, since brain uptake of glucose, inulin, and tyramine was unaffected while blood-brain arginine transport was significantly reduced. These results strikingly confirm the hypothesis that carrier-mediated blood-brain transport is the limiting factor determining the availability of the neutral amino acids to the brain. The encephalopathy associated with cirrhosis may be the result of abnormal neurotransmitter metabolism and neurotransmission secondary to increased neutral amino acid transport activity and an increased brain content of members of the neutral amino acid group.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉James, J H -- Escourrou, J -- Fischer, J E -- New York, N.Y. -- Science. 1978 Jun 23;200(4348):1395-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/663619" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acids/*metabolism ; Animals ; Arginine/metabolism ; *Blood-Brain Barrier ; Brain/*metabolism ; Female ; Glucose/metabolism ; Insulin/metabolism ; Liver Cirrhosis, Alcoholic/metabolism ; Phenylalanine/metabolism ; *Portacaval Shunt, Surgical ; Rats ; Tryptophan/*metabolism ; Tyramine/metabolism
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  • 16
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-03-03
    Description: Human circulating monocytes in tissue culture are capable of resorbing devitalized adult and fetal bone. An important component of this process is the adhesion of the cells to the mineralized substrate and the localized removal of matrix from beneath the attached cells. The process appears to involve both release of lysosomal enzymes onto the substrate and intracellular accumulation (transport) of resorbed matrix.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kahn, A J -- Stewart, C C -- Teitelbaum, S L -- New York, N.Y. -- Science. 1978 Mar 3;199(4332):988-90.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/622581" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bone Matrix/cytology/metabolism/physiology ; *Bone Resorption ; Bone and Bones/embryology/metabolism ; Calcium Radioisotopes ; Cell Adhesion ; Culture Techniques ; Humans ; Monocytes/cytology/metabolism/*physiology ; Rats
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  • 17
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-09-29
    Description: Honey bees were trained in two consecutive two-dimensional (color-position) problems with one dimension (color or position) relevant and the other irrelevant in each problem. As in analogous experiments on dimensional transfer in rats and monkeys, performance in the second problem was more accurate when the relevant and irrelevant dimensions were the same as in the first problem than when they were interchanged. The results of further experiments suggest that the transfer is mediated by different modes of responding that develop in color and position problems rather than by some special process of dimensional selection, such as has been assumed to operate in vertebrates.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Klosterhalfen, S -- Fischer, W -- Bitterman, M E -- New York, N.Y. -- Science. 1978 Sep 29;201(4362):1241-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/694513" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Attention/*physiology ; Bees/*physiology ; Behavior, Animal/physiology ; Color Perception ; Discrimination Learning/*physiology ; Rats ; Species Specificity
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  • 18
    Publication Date: 1978-03-24
    Description: Glucan is a potent reticuloendothelial stimulant whose immunobiological activity is mediated, in part, by an increase in the number and function of macrophages. In studying the role of glucan as a mediator of antibacterial activity, we attempted to ascertain the ability of glucan to modify the mortality of mice with experimentally induced Gram-positive bacteremia, and to enhance antibacterial defenses in rats as denoted by serum lysozyme and phagocytic activity. After intravenous administration of glucan, serum lysozyme concentrations were increased approximately sevenfold over control concentrations. The increase in serum lysozyme appeared to parallel the glucan-induced increase in phagocytosis and induced hyperplasia of macrophages. Prior treatment of mice with glucan significantly enhanced their survival when they were challenged systemically with Staphylococcus aureus. These studies indicate that glucan confers an enhanced state of host defense against bacterial infections.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kokoshis, P L -- Williams, D L -- Cook, J A -- Di Luzio, N R -- New York, N.Y. -- Science. 1978 Mar 24;199(4335):1340-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/628841" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bacteriolysis/drug effects ; Immunotherapy ; Macrophages/drug effects ; Male ; Muramidase/*blood ; Phagocytosis/*drug effects ; Polysaccharides/*pharmacology/therapeutic use ; Rats ; Sepsis/prevention & control ; Staphylococcal Infections/*prevention & control/therapy ; Staphylococcus aureus
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  • 19
    Publication Date: 1978-01-20
    Description: Dispersed pinealocytes have been used to study the role of adenosine 3',5'-monophosphate (cyclic AMP) in the "turnoff" of N-acetyltransferace activity. Activity was first stimulated 100-fold by treating cells with 1-norepinephrine. 1-Propranolol acted stereospecifically to rapidly reverse this, resulting in a 70 percent loss of enzyme activity within 15 minutes. An even more rapid 1-propranolol-induced decreased in cyclic AMP also occurred. This together with the observation that the inhibitory effect of 1-propranolol on N-acetyltransferase was blocked by dibutyryl cyclic AMP and phosphodiesterase inhibitors indicate that an abrupt decrease in cyclic AMP may be the signal for the rapid decrease in pineal N-acetyltransferase activity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Klein, D C -- Buda, M J -- Kapoor, C L -- Krishna, G -- New York, N.Y. -- Science. 1978 Jan 20;199(4326):309-11.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/202027" target="_blank"〉PubMed〈/a〉
    Keywords: Acetyltransferases/antagonists & inhibitors/*metabolism ; Animals ; Bucladesine/pharmacology ; Cyclic AMP/*metabolism ; In Vitro Techniques ; Phosphodiesterase Inhibitors/pharmacology ; Pineal Gland/*metabolism ; Propranolol/antagonists & inhibitors/pharmacology ; Rats ; Serotonin
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  • 20
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-09-22
    Description: Parameters of bone formation and resorption were measured in rats orbited for 19.5 days aboard the Soviet Cosmos 782 biological satellite. The most striking effects were on bone formation. During flight, rats formed significantly less periosteal bone than did control rats on the ground. An arrest line at both the periosteum and the endosteum of flight animals suggest that a complete cessation of bone growth occurred. During a 26-day postflight period, the defect in bone formation was corrected. No significant changes in bone resorption were observed.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Morey, E R -- Baylink, D J -- New York, N.Y. -- Science. 1978 Sep 22;201(4361):1138-41.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/150643" target="_blank"〉PubMed〈/a〉
    Keywords: *Aerospace Medicine ; Animals ; *Bone Development ; Bone Matrix/physiology ; Bone Resorption ; Male ; Periosteum/physiology ; Rats ; *Space Flight ; Specific Pathogen-Free Organisms ; Tetracycline ; Tibia/cytology/growth & development/physiology ; Time Factors ; Weightlessness
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  • 21
    Publication Date: 1978-08-18
    Description: Lead (200 milligrams per kilogram) was administered daily by intubation to Long-Evans rats on days 3 through 30 of life. Thirty to 180 days after cessation of lead administration, the lead-treated rats were consistently more polydipsic after lithium administration (2 millimoles per kilogram per day) than were pair-treated controls. Lithium increased the plasma renin activity equally in both the lead treated and the control groups. These data are evidence that there may be permanent neural changes induced by postnatal exposure to lead that are manifested by pharmacological challenge with lithium.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mailman, R B -- Krigman, M R -- Mueller, R A -- Mushak, P -- Breese, G R -- New York, N.Y. -- Science. 1978 Aug 18;201(4356):637-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/675249" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Newborn ; *Drinking Behavior/drug effects ; Female ; Lead Poisoning/*physiopathology ; Lithium/pharmacology ; Male ; Rats ; Renin/blood
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  • 22
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-08-11
    Description: Animals receiving low-intensity electrical stimulation of the basolateral nucleus of the amygdala while drinking plain tap water were injected with toxic doses of lithium chloride to examine whether brain stimulation can serve as a conditioned stimulus in a bait-shyness paradigm. Subjects receiving this pairing greatly reduced their water intake in a retention test, in a similar manner to a group in which saccharin was paired with poisoning. Pairing lithium chloride with stimulation of the amygdala had no effect on subsequent water intake in the absence of brain stimulation. This effect appears to be locus specific, as caudate stimulation could not serve as a conditioned stimulus.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Phillips, A G -- LePiane, F G -- New York, N.Y. -- Science. 1978 Aug 11;201(4355):536-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/663673" target="_blank"〉PubMed〈/a〉
    Keywords: Amygdala/*physiology ; Animals ; Avoidance Learning/*physiology ; Brain Mapping ; Caudate Nucleus/physiology ; Conditioning, Classical/*physiology ; Electric Stimulation ; Male ; Rats ; Retention (Psychology)/physiology ; Taste/*physiology
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  • 23
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-12-15
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mason, S T -- Fibiger, H C -- New York, N.Y. -- Science. 1978 Dec 15;202(4373):1215-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/725598" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Hydroxydopamines/*pharmacology ; Motor Activity/*drug effects ; Norepinephrine/pharmacology ; Parasympathomimetics/pharmacology ; Rats
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  • 24
    Publication Date: 1978-07-28
    Description: Kainic acid lesion of cell bodies in the dorsal striatum enhanced the stereotypy-producing effects of d-amphetamine without affecting the sterotypy produced by the direct receptor agonist apomorphine. This pattern of results parallels that found in patients suffering from Hungtington's chorea, thus strengthening the parallels between the kainic acid animal model and the human disease state initially suggested on biochemical gounds. The present results further suggest a dissociation of the mechanisms involved in the production of stereotypy by these two drugs, perhaps in terms of differential involvement of the striato-nigral negative feedback loop.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mason, S T -- Sanberg, P R -- Fibiger, H C -- New York, N.Y. -- Science. 1978 Jul 28;201(4353):352-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26976" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Apomorphine/*pharmacology ; Behavior/*drug effects ; Choline O-Acetyltransferase/metabolism ; Corpus Striatum/*drug effects/enzymology/pathology ; Dextroamphetamine/*pharmacology ; Disease Models, Animal ; Glutamate Decarboxylase/metabolism ; Humans ; Huntington Disease/*physiopathology ; *Kainic Acid/pharmacology ; Male ; Nucleus Accumbens/enzymology ; *Pyrrolidines/pharmacology ; Rats ; Stereotyped Behavior/*drug effects ; Tyrosine 3-Monooxygenase/metabolism
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  • 25
    Publication Date: 1978-06-09
    Description: Prior incubation of rat anterior pituitary cells with 17beta-estradiol led to an almost complete reversal of the inhibitory effect of two dopamine agonists, dihydroergocornine and RU 24213, on both basal prolactin release and thyrotropin releasing hormone-induced prolactin release. These experiments thus demonstrate a direct interference of dopamine action by a peripheral hormone. Prolactin secretion by pituitary cells in primary culture could possibly serve as an easily accessible model of a system under dopaminergic control.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Raymond, V -- Beaulieu, M -- Labrie, F -- Boissier, J -- New York, N.Y. -- Science. 1978 Jun 9;200(4346):1173-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/418505" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Dihydroergotoxine/antagonists & inhibitors ; *Dopamine Antagonists ; Estradiol/*pharmacology ; Female ; Phenethylamines/antagonists & inhibitors ; Pituitary Gland, Anterior/*drug effects/secretion ; Prolactin/*secretion ; Rats ; Thyrotropin-Releasing Hormone/pharmacology
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  • 26
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-04-07
    Description: The pentapeptides methionine-enkephalin and leucine-enkephalin are both able to reduce experimentally induced amnesia in rats. In contrast to the possible analgesic activity of these peptides, the anti-amnesic effect is seen after systemic administration of dosages of 30 micrograms or lower. The nature of the anti-amnesic effect is different for the two peptides.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rigter, H -- New York, N.Y. -- Science. 1978 Apr 7;200(4337):83-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/635578" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Avoidance Learning/*drug effects ; Carbon Dioxide/antagonists & inhibitors ; Dose-Response Relationship, Drug ; Endorphins/*pharmacology ; Enkephalins/*pharmacology ; Male ; Memory/*drug effects ; Rats ; Time Factors
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  • 27
    Publication Date: 1978-04-07
    Description: Gonadotropin-releasing hormone and dopamine were identified simultaneously in the same block of tissue from the median eminence of the rat brain. Two distinct bands of dopamine terminals were found in the lateral median eminence: an inner band which overlapped the gonadotropin-releasing hormone terminals and an outer band which appeared juxtaposed to portal capillaries.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McNeill, T H -- Sladek, J R Jr -- New York, N.Y. -- Science. 1978 Apr 7;200(4337):72-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/345442" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Dopamine/*metabolism ; Gonadotropin-Releasing Hormone/*metabolism ; Hypothalamo-Hypophyseal System/*metabolism ; Immunoenzyme Techniques ; Male ; Median Eminence/*metabolism ; Microscopy, Fluorescence ; Nerve Endings/metabolism ; Norepinephrine/*metabolism ; Rats
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  • 28
    Publication Date: 1978-09-01
    Description: Hepatic pigment clearance in rats can be followed continuously with photometric detectors designed for high-pressure liquid chromatography. This method showed that light has a fast effect on bilirubin metabolism in homozygous Gunn rats, even at low doses and intensities. This is consistent with geometric isomerization of bilirubin IXalpha as a primary step in phototherapy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McDonagh, A F -- Ramonas, L M -- New York, N.Y. -- Science. 1978 Sep 1;201(4358):829-31.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/581101" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bile/metabolism ; Bilirubin/blood/*metabolism/radiation effects ; *Disease Models, Animal ; Humans ; Infant, Newborn ; Jaundice, Neonatal/*therapy ; Kinetics ; Liver/metabolism ; *Phototherapy ; Rats
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  • 29
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-03-31
    Description: delta9-Tetrahydrocannabinol, the most active constituent of marihuana, decreased species-specific attack behavior in mice, rats, and squirrel monkeys at doses (0.25 to 2.0 milligram per kilogram of body weight) that have no effects on other elements of the behavioral repertoire. Aggressive behavior was engendered in all three species by confronting a resident animal with an intruder conspecific. The present results contrast with the widely held belief that marihuana increases aggressive behavior.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Miczek, K A -- New York, N.Y. -- Science. 1978 Mar 31;199(4336):1459-61.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/415367" target="_blank"〉PubMed〈/a〉
    Keywords: Aggression/*drug effects ; Animals ; Behavior, Animal/*drug effects ; Depression, Chemical ; Dose-Response Relationship, Drug ; Dronabinol/*pharmacology ; Female ; Haplorhini ; Humans ; Male ; Mice ; Motor Activity/drug effects ; Rats ; Saimiri ; Territoriality
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  • 30
    Publication Date: 1978-06-23
    Description: In all species studied, the medial preoptic area has been found to be necessary for male copulatory behavior. No recovery of sexual function from the medial preoptic area lesions appears to have been reported. This study demonstrates that rats with large lesions of the medial preoptic area exhibit adult male sexual behavior when the surgery is performed prepuberally and the rats have interacted socially with peers.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Twiggs, D G -- Popolow, H B -- Gerall, A A -- New York, N.Y. -- Science. 1978 Jun 23;200(4348):1414-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/663624" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Copulation/*physiology ; Environment ; Hypothalamus/*physiology ; Male ; Preoptic Area/*physiology ; Rats ; *Sexual Maturation
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  • 31
    Publication Date: 1978-02-03
    Description: Rats dosed orally which [carboxyl-14C]cyclopropanecarboxylic acid (or its hexadecyl ester) retain radioactivity in tissue as novel triacylglycerols. The most abundant 14C-labeled metabolites were identified by gas-liquid chromatography-mass spectrometry as 13-cyclopropyltridecanoic and 15-cyclopropylpentadecanoic acids. Similar omega-cyclopropyl fatty acids are produced by beagle dogs and a lactating cow, as well as by apple and orange trees.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schooley, D A -- Quistad, G B -- Staiger, L E -- New York, N.Y. -- Science. 1978 Feb 3;199(4328):544-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/622554" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Carboxylic Acids/*metabolism ; Cattle ; Cyclopropanes/*metabolism ; Dogs ; Fatty Acids/*metabolism ; Female ; Milk/metabolism ; Mites/drug effects ; Pesticides/metabolism ; Plants/metabolism ; Rats
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  • 32
    Publication Date: 1978-06-09
    Description: By means of antiserum (purified by affinity chromatography) directed against adrenocorticotropin (ACTH) 11-24, cell bodies and beaded axons were visualized in rat brain. The ACTH-like immunoreactivity (ACTH-LI) was primarily located in the hypothalamus (cells and axons). Fibers were scattered throughout thalamus, amygdala, periaqueductal gray area, and reticular formation. There was no change in the distribution of ACTH-LI in rats that had been subjected to hypophysectomy. This distribution of ACTH-LI parallels that of beta-lipotropin and is altered by specific lesions in a similar fashion. The presence of ACTH-LI in cells and beaded axons in brain raises the possibility that it is a neuroregulator functioning as a neurotransmitter, neuromodulator, or neurohormone.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Watson, S J -- Richard, C W 3rd -- Barchas, J D -- New York, N.Y. -- Science. 1978 Jun 9;200(4346):1180-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/206967" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenocorticotropic Hormone/*metabolism ; Animals ; Axons/metabolism ; Brain/cytology/*metabolism ; Hypothalamus/metabolism ; Immunoenzyme Techniques ; Male ; Pituitary Gland/*metabolism ; Rats ; beta-Lipotropin/metabolism
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  • 33
    Publication Date: 1978-06-30
    Description: A single injection of 5 or 10 microliters of ferrous or ferric chloride into rat or cat sensorimotor cortex resulted in chronic recurrent focal paroxysmal electroencephalographic discharges as well as behavioral convulsions and electrical seizures. Recurrent focal epileptiform discharge caused by cortical injection of iron salts suggests that the development of human posttraumatic epilepsy may depend, in part, on the neurochemical alterations induced by the principal metallic ions found in whole blood.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Willmore, L J -- Sypert, G W -- Munson, J V -- Hurd, R W -- New York, N.Y. -- Science. 1978 Jun 30;200(4349):1501-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/96527" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cats ; Cerebral Cortex/*drug effects/physiopathology ; *Disease Models, Animal ; Electrophysiology ; Epilepsies, Partial/*chemically induced ; Ferric Compounds ; Ferrous Compounds ; *Iron ; Rats ; Seizures/*chemically induced/physiopathology
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  • 34
    Publication Date: 1979-09-07
    Description: In laboratory rodents, concentrations of reduced glutathione (GSH) are exceedingly high (up to 7 to 8 millimolar) in the glandular gastric tissue compared to concentrations in other portions of the gastrointestinal tract or to those of most other organs. Gastric GSH varies diurnally, with the highest levels occurring in the late afternoon or early evening. Starvation, treatment with diethyl maleate, or cold-restraint stress all caused marked decreases in stomach GSH, whereas treatment with cobaltous chloride caused an increase in the GSH concentrations. The physiological significance of the high gastric GSH is unknown, but because this endogenous compound may strongly modulate (decrease or increase) the macromolecular binding of certain chemicals capable of inducing stomach tumors, the possible role of glutathione in the pathogenesis of chemically induced gastric cancer should be considered.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Body, S C -- Sasame, H A -- Body, M R -- New York, N.Y. -- Science. 1979 Sep 7;205(4410):1010-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/572989" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Circadian Rhythm ; Cobalt/pharmacology ; Food Deprivation ; Glutathione/*metabolism ; Liver/metabolism ; Rats ; Stomach/*metabolism ; Stomach Neoplasms/*etiology ; Stress, Physiological/physiopathology
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  • 35
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-04-06
    Description: Vascular casts of the pituitary gland have demonstrated a paucity of veins extending from the adenohypophysis to the systemic circulation and have suggested that some adenohypophyseal venous blood returns to the neurohypophysis. The neurohypophyseal capillary bed may function as a vascular switch and in this article a series of 14 questions are proposed regarding the vascular dynamics of the pituitary. Together these questions raise the larger question, namely, whether pituitary hormones are transported directly to the brain to modify brain function?〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bergland, R M -- Page, R B -- New York, N.Y. -- Science. 1979 Apr 6;204(4388):18-24.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/373118" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arteriovenous Anastomosis/anatomy & histology ; Capillaries/anatomy & histology ; Cats ; *Cerebrovascular Circulation ; Dogs ; Humans ; Hypothalamo-Hypophyseal System/blood supply ; Pituitary Gland/*blood supply ; Pituitary Gland, Anterior/blood supply ; Rats ; Species Specificity
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  • 36
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-09-22
    Description: Purified mast cells secreted histamine when fused to phospholipid vesicles containing calcium but not magnesium or potassium. Microscopic observation revealed highly localized exocytotic responses involving punctate extrusion of individual granules. Calcium delivered from the vesicles to the cytoplasm is apparently a sufficient stimulus to initiate exocytosis. The results support the calcium hypothesis of stimulus-secretion coupling.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Theoharides, T C -- Douglas, W W -- New York, N.Y. -- Science. 1978 Sep 22;201(4361):1143-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/684435" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Ascitic Fluid/cytology ; Calcium/*pharmacology ; Exocytosis ; In Vitro Techniques ; Liposomes/*pharmacology ; Mast Cells/cytology/drug effects/*secretion ; Rats ; Ruthenium Red
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  • 37
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-03-16
    Description: Subcutaneous injections of naloxone, an opiate antagonist, lead to an increase in serum luteinizing hormone concentrations in female but not in male rats before they reach puberty. In addition, estradiol benzoate specifically blocks the luteinizing hormone response to naloxone in prepubertal female rats, suggesting that the opioid peptides have a physiological role in the endocrine events leading to sexual maturation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Blank, M S -- Panerai, A E -- Friesen, H G -- New York, N.Y. -- Science. 1979 Mar 16;203(4385):1129-31.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/424743" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Endorphins/antagonists & inhibitors/*physiology ; Estradiol/pharmacology ; Female ; Luteinizing Hormone/blood/*secretion ; Male ; Naloxone/antagonists & inhibitors/pharmacology ; Rats ; Secretory Rate/drug effects ; Sexual Maturation/*drug effects
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  • 38
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-06-15
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cantor, M B -- New York, N.Y. -- Science. 1979 Jun 15;204(4398):1235-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/451570" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/*physiology ; Electric Stimulation ; Electrodes ; Methods ; Rats ; *Reinforcement (Psychology)
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  • 39
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-06-08
    Description: The reduction of glycolysis by hypoglycemia or the glucose analog 2-deoxy-D-glucose (2DG) stimulates compensatory sympathetic alterations of metabolism. Considerable attention has been focused on the hypothalamus as the probable locus of requisite metabolic signal detection. We report, however, that unanesthetized chronically decerebrate rats are capable of exhibiting sympathoadrenal hyperglycemia in response to the metabolic challenge presented by 2DG. This findings demonstrates that the forebrain is not necessary for glucoprivic stimulation of this reflex. Since cervical cord transection has been shown to eliminate hyperglycemia induced by 2DG, we conclude that the caudal brainstem contains an essential part of the neural mechanism which both detects metabolic need and ameliorates that need through the release of stored fuels.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉DiRocco, R J -- Grill, H J -- New York, N.Y. -- Science. 1979 Jun 8;204(4397):1112-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/451558" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenal Glands/physiology ; Afferent Pathways ; Animals ; Blood Glucose/*metabolism ; Brain Stem/*physiology ; Decerebrate State ; Deoxy Sugars/*pharmacology ; Deoxyglucose/*pharmacology ; *Energy Metabolism ; Hypothalamus/*physiology ; Rats ; Reflex/physiology ; Sympathetic Nervous System/physiology
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  • 40
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-08-17
    Description: Unlike normal animals or those with sham lesions, rats with hippocampal and septal lesions behaved in an operant chamber as if a dependency existed between pellet delivery and their behavior, despite the fact that reinforcement was based on time, not behavior, and was therefore free. This superstitious behavior did not result from a general inability to inhibit responding, as responding rapidly ceased when the pellets were discontinued. These findings suggest that the hippocampus integrates information regarding response-reinforcer relations, which in the normal rat permits superfluous operant behavior to be eliminated.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Devenport, L D -- New York, N.Y. -- Science. 1979 Aug 17;205(4407):721-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/462183" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Behavior, Animal/*physiology ; Conditioning, Operant/physiology ; Hippocampus/*physiology ; Learning/physiology ; Rats ; Reinforcement (Psychology) ; Septal Nuclei/*physiology ; *Superstitions
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  • 41
    Publication Date: 1979-09-21
    Description: The hypothesis was tested that an acute rise of blood pressure may reduce reactivity to noxious stimuli through a baroreceptor-mediated reduction of cerebral arousal. When blood pressure was raised by an infusion of phenylephrine, rats showed less running to terminate or avoid noxious stimuli than during saline infusions. This effect was not seen in rats with denervated baroreceptors. The results suggest that a rise of blood pressure could have motivational consequences significant for human hypertension.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dworkin, B R -- Filewich, R J -- Miller, N E -- Craigmyle, N -- Pickering, T G -- New York, N.Y. -- Science. 1979 Sep 21;205(4412):1299-301.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/472749" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Avoidance Learning/drug effects/*physiology ; Blood Pressure/drug effects ; Heart Rate/drug effects ; Hypertension/*physiopathology ; Male ; Motivation/physiology ; Phenylephrine/pharmacology ; Pressoreceptors/*physiology ; Rats
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  • 42
    Publication Date: 1979-01-26
    Description: The onset of maternal responsiveness by virgin female rats to foster pups was observed after (i) complete vomeronasal nerve cuts, (ii) partial olfactory bulb cuts, or (iii) the combined procedures. Although both vomeronasal nerve cuts and olfactory bulb cuts resulted in a more rapid onset of maternal care, relative to control animals with sham operations, animals sustaining the loss of both sources of olfactory input exhibited the shortest response latency. These findings are discussed in terms of the probable distinct functions of the two olfactory systems in the control of maternal behavior in the rat.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fleming, A -- Vaccarino, F -- Tambosso, L -- Chee, P -- New York, N.Y. -- Science. 1979 Jan 26;203(4378):372-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/760196" target="_blank"〉PubMed〈/a〉
    Keywords: Afferent Pathways ; Animals ; Central Nervous System/*physiology ; Female ; *Maternal Behavior ; Olfactory Bulb/physiology ; Olfactory Pathways/*physiology ; Rats ; Smell/*physiology
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  • 43
    Publication Date: 1979-08-31
    Description: The Na+,k+-adenosine triphosphatase-inhibiting activity of digitalis genins and their analogs is a function of side-group carbonyl (C = O) oxygen position. For each 2.2 angstroms that this oxygen is displaced from its position in digitoxigenin, activity drops by one order of magnitude. This quantitative relation resolves previously proposed models which have attempted to describe the molecular basis of genin activity. A multidisciplinary (crystallographic, conformational energy, synthetic, biological) approach to structure-activity relations is described.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fullerton, D S -- Yoshioka, K -- Rohrer, D C -- From, A H -- Ahmed, K -- New York, N.Y. -- Science. 1979 Aug 31;205(4409):917-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/224455" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/enzymology ; Digitalis Glycosides/*pharmacology ; Molecular Conformation ; Rats ; Sodium-Potassium-Exchanging ATPase/*antagonists & inhibitors ; Structure-Activity Relationship
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  • 44
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-04-13
    Description: The intraventricular injection of D-alanine-methionine-enkephalinamide (D-Ala2-Met-enkephalinamide), a synthetic analog of Met-enkephalin that is resistant to enzymatic degradation, inhibits copulatory behavior in sexually vigorous male rats in doses which do not influence motor activity or feeding behavior. This effect is prevented by naloxone, a specific inhibitor of opioid receptors. In addition, injections of naloxone induce copulatory behavior in sexually inactive male rats. These results suggest that endorphins play an important role in the regulation of sexual behavior.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gessa, G L -- Paglietti, E -- Quarantotti, B P -- New York, N.Y. -- Science. 1979 Apr 13;204(4389):203-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/432642" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Copulation/*drug effects ; Endorphins/*pharmacology ; Enkephalins/*pharmacology ; Feeding Behavior/drug effects ; Male ; Motor Activity/drug effects ; Naloxone/*pharmacology ; Rats
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  • 45
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-10-05
    Description: The uptake of 45Ca2+ by nerve-ending fractions from brains of mice was inhibited in vitro by 10(-9)M concentrations of beta-endorphin and in mice injected intraventricularly with 7 picomoles of beta-endorphin. That the effect was a specific opiate agonist response of beta-endorphin was demonstrated by use of the opiate antagonist, naloxone, which reversed the action. A role for beta-endorphin in the regulation of calcium flux and neurotransmitter release should be considered.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Guerrero-Munoz, F -- de Lourdes Guerrero, M -- Way, E L -- Li, C H -- New York, N.Y. -- Science. 1979 Oct 5;206(4414):89-91.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/39340" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Transport/drug effects ; Calcium/*metabolism ; Dose-Response Relationship, Drug ; Drug Tolerance ; Endorphins/antagonists & inhibitors/*pharmacology ; Male ; Mice ; Naloxone/pharmacology ; Neurotransmitter Agents/metabolism ; Rats ; Synaptosomes/*drug effects/metabolism
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  • 46
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-04-06
    Description: Female weanling rats from a colony maintained on a diet low in vitamin D were raised on a diet that was deficient in vitamin D but was otherwise adequate. Vitamin D deficiency was confirmed in the rats by hypocalcemia and the absence of vitamin D metabolites in blood. These females gave birth to litters that were slightly smaller than control litters from females maintained on a vitamin D-containing diet. The pups from the vitamin D-deficient mothers appeared normal throughout lactation, and at weaning had normal concentrations of calcium and phosphate in the plasma. These results indicate that vitamin D and its metabolites are not necessary for reproduction and fetal development in the rat.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Halloran, B P -- DeLuca, H F -- New York, N.Y. -- Science. 1979 Apr 6;204(4388):73-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/432628" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Suckling/blood ; Body Weight ; Bone Development ; Calcium/blood ; Female ; Hydroxycholecalciferols/blood ; Phosphates/blood ; Rats ; *Reproduction ; Vitamin D Deficiency/blood/*physiopathology
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  • 47
    Publication Date: 1979-10-05
    Description: Unilateral lesion of the locus coeruleus and the resultant norepinephrine depletion in the ipsilateral cerebrum alters the relationship between cerebral metabolic demands and local delivery of oxygen and substrates. This effect of norepinephrine depletion is demonstrated by slower recovery of the redox ratio of cytochrome a,a3 during increased metabolic demands induced by local cortical stimulation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Harik, S I -- LaManna, J C -- Light, A I -- Rosenthal, M -- New York, N.Y. -- Science. 1979 Oct 5;206(4414):69-71.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/482927" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cerebral Cortex/*metabolism ; Cytochromes/*metabolism ; Energy Metabolism ; Evoked Potentials ; Locus Coeruleus/*physiology ; Male ; Norepinephrine/*physiology ; Oxidation-Reduction ; Rats ; Spectrophotometry
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  • 48
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-08-31
    Description: The role of exteroceptive and interoceptive aversive stimuli in rats 2 to 14 days old was investigated according to an odor aversion paradigm. Amyl acetate odor was paired with eigher peripheral shock, intraperitoneal shock, or lithium chloride poisoning. Intraperitoneal shock was an effective unconditioned stimulus at all ages and produced odor aversions comparable to lithium chloride poisoning; peripheral shock, however, was effective only in rats 10 days of age or older. Interoceptive control of aversively motivated behaviors thus seems to develop before exteroceptive control, and the failure of previous studies to find reliable learning and retention of shock-motivated behaviors before 8 to 10 days of age may be attributable to the site to which shock was applied rather than to insensitivity to shock per se.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Haroutunian, V -- Campbell, B A -- New York, N.Y. -- Science. 1979 Aug 31;205(4409):927-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/472715" target="_blank"〉PubMed〈/a〉
    Keywords: Age Factors ; Animals ; Avoidance Learning/*physiology ; Behavior, Animal/*physiology ; Conditioning (Psychology)/physiology ; Electroshock ; Perception/*physiology ; Rats ; Retention (Psychology)/physiology ; Smell/physiology
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  • 49
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-07-20
    Description: Close study of 3-hydroxybutyrate uptake by brain suggests that its metabolism is limited by permeability. Furthermore, the permeability characteristics vary from region to region; areas known to have no blood-brain barrier show the highest rate of utilization. The results imply that rather than substitute fuels, ketone bodies should be considered supplements which partially supply specific areas but are incapable of supporting the entire energy requirement of all brain regions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hawkins, R A -- Biebuyck, J F -- New York, N.Y. -- Science. 1979 Jul 20;205(4403):325-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/451608" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Blood-Brain Barrier ; Brain/*metabolism ; Glucose/metabolism ; Hydroxybutyrates/metabolism ; Ketone Bodies/*metabolism ; Male ; Rats ; Starvation/metabolism
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  • 50
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-09-14
    Description: 17 beta-[16 alpha-125I]Iodoestradiol has been synthesized by exchange of 16 beta-bromoestradiol with Na125I. The iodinated product is readily separated from the bromo reactant by column chromatography. It concentrates in the rat uterus in vivo and binds avidly and specifically to the uterine estrogen receptor in vitro.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hochberg, R B -- New York, N.Y. -- Science. 1979 Sep 14;205(4411):1138-40.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/472733" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Estradiol/*analogs & derivatives/analysis/metabolism ; Female ; Iodine Radioisotopes ; Radioimmunoassay/methods ; Rats ; Receptors, Estrogen/*metabolism ; Uterus/metabolism
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  • 51
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-06-15
    Description: Norepinephrine reversibly antagonizes three calcium-dependent potentials recorded from rat postganglionic neurons. Norepinephrine inhibits the development of a shoulder on the aciton potential, the magnitude of the hyperpolarizing afterpotential, and the rate of rise and amplitude of the calcium spike. The action of norepinephrine is antagonized by the alpha-adrenergic antagonist phentolamine, but not by MJ 1999, a beta-adrenergic antagonist. These results suggest that activation of an alpha-adrenergic receptor may antagonize a voltage-sensitive calcium current.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Horn, J P -- McAfee, D A -- New York, N.Y. -- Science. 1979 Jun 15;204(4398):1233-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/221979" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Calcium/antagonists & inhibitors/*physiology ; Dopamine/pharmacology ; Electric Conductivity ; Ganglia, Autonomic/*drug effects ; In Vitro Techniques ; Ion Channels/*drug effects ; Isoproterenol/pharmacology ; Membrane Potentials/*drug effects ; Neurons/drug effects ; Norepinephrine/*pharmacology ; Rats ; Receptors, Adrenergic, alpha/drug effects
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  • 52
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-01-26
    Description: Progesterone receptors in the autonomous rat mammary tumor MTW-9B are reduced 80 to 90 percent after ovariectomy, but are not reduced if ovariectomized animals are given estrogen. Tumor growth, however, is independent of estrogen status and insensitive to pharmacological doses of estradiol. This represents an unusual system characterized by a selective action of an inducing agent on the genome.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ip, M -- Milholland, R J -- Rosen, F -- Kim, U -- New York, N.Y. -- Science. 1979 Jan 26;203(4378):361-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/760195" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Castration ; Cytosol/metabolism ; Estradiol/metabolism/pharmacology ; Female ; Male ; Mammary Neoplasms, Experimental/*metabolism ; Rats ; Receptors, Estrogen/*metabolism ; Receptors, Progesterone/biosynthesis/drug effects/*metabolism
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  • 53
    Publication Date: 1979-01-26
    Description: A single injection of methylazoxymethanol in pregnant rats at 15 days of gestation results in severe cortical atrophy in the offspring. In the adult offspring, the neurochemical markers for the cortical gamma-aminobutyric acid-containing neurons are severely reduced, whereas the noradrenergic markers are minimally altered. Immunohistofluorescence microscopy demonstrates a marked increase in the density of noradrenergic axons which have an abnormal pattern of distribution in the atrophic cortex. The results suggest that the central noradrenergic neurons determine the number of axons to be formed early in brain development, but local factors in the terminal field regulate the ultimate distribution of the noradrenergic axons.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Johnston, M V -- Grzanna, R -- Coyle, J T -- New York, N.Y. -- Science. 1979 Jan 26;203(4378):369-71.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/32620" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenergic Fibers/cytology/*embryology ; Animals ; Azo Compounds/*pharmacology ; Brain/cytology/*embryology ; Cell Differentiation/drug effects ; Cerebral Cortex/embryology/enzymology ; Glutamate Decarboxylase/metabolism ; Methylazoxymethanol Acetate/*pharmacology ; Neural Pathways/embryology ; Norepinephrine/metabolism ; Rats ; Tyrosine 3-Monooxygenase/metabolism ; gamma-Aminobutyric Acid/metabolism
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  • 54
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-10-19
    Description: A mixture of seven food dyes inhibited the accumulation of eight neurotransmitters or neurotransmitter precursors by rat brain homogenate. At a low concentration (1 microgram per milliliter), erythrosin B (FD&C red 3) was the only dye that inhibited dopamine accumulation. Erythrosin also was effective in decreasing the accumulation of all the other transmitter substances, suggesting that the inhibition is nonspecific and probably secondary to general membrane alteration.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Logan, W J -- Swanson, J M -- New York, N.Y. -- Science. 1979 Oct 19;206(4416):363-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/39341" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell-Free System ; Depression, Chemical ; Dopamine/metabolism ; Erythrosine/adverse effects/*pharmacology ; Fluoresceins/*pharmacology ; Food Coloring Agents/adverse effects/*pharmacology ; Neurotransmitter Agents/*metabolism ; Rats ; Synapses/*drug effects
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  • 55
    Publication Date: 1979-05-11
    Description: Differential spread of afterdischarge activity initiated electrically in ventral and dorsal parts of the hippocampal formation was studied by the [14C]deoxyglucose technique in rats. Afterdischarges initiated in either the ventral or dorsal hippocampal formation, without activation of the ventral subicular cortex, increased glucose utilization in the lateral septum. In contrast, afterdischarges initiated by direct activation of the ventral subicular cortex increased glucose utilization in extensive areas of the ipsilateral amygdala, claustrum, hypothalamus, preoptic region, and basal forebrain.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kliot, M -- Poletti, C E -- New York, N.Y. -- Science. 1979 May 11;204(4393):641-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/432672" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Animals ; Brain/*metabolism ; Brain Mapping ; Deoxy Sugars/*metabolism ; Deoxyglucose/*metabolism ; Diencephalon/metabolism ; Electric Stimulation ; Epilepsy/physiopathology ; Hippocampus/*physiology ; Male ; Neural Pathways/physiology ; Rats
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  • 56
    Publication Date: 1979-05-25
    Description: Single islet cells in monolayer cultures of neonatal rat pancreas were microinjected with fluorescein and scanned topographically by microfluorometry. Fluorescein spread from an injected islet cell directly into neighboring islet cells, and, in the presence of 16.7 millimolar glucose, significantly more islet cells communicated with the injected cell than in glucose-free medium. Islet cells were also microinjected with glycolytic substrates and activators that produced transient changes in cellular levels of reduced pyridine nucleotides-nicotinamide adenine dinucleotide and nicotinamide adenine dinucleotide phosphate [NAD(P)H]. Changes in NAD(P)H fluorescence were observed in islet cells incubated first for 18 hours in very low glucose concentrations and then in a glucose-free medium and injected with glycolytic substrates and activators; however, little change of fluorescence occurred in adjacent islet cells. In contrast, after adding 16.7 millimolar glucose to the medium, injection of glycolytic substrates and activators produced transient changes in NAD(P)H fluorescence in the injected cell and in neighboring cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kohen, E -- Kohen, C -- Thorell, B -- Mintz, D H -- Rabinovitch, A -- New York, N.Y. -- Science. 1979 May 25;204(4395):862-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/35828" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Cell Communication/drug effects ; Fluoresceins ; Glucose/pharmacology ; Glycolysis ; Islets of Langerhans/cytology/*physiology ; Kinetics ; NAD/metabolism ; NADP/metabolism ; Rats ; Spectrometry, Fluorescence
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  • 57
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-09-07
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kolata, G B -- New York, N.Y. -- Science. 1979 Sep 7;205(4410):985-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/112680" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenocortical Hyperfunction/physiopathology ; Animals ; Behavior/*physiology ; Behavior, Animal/physiology ; Brain/*growth & development ; Female ; Gonadal Steroid Hormones/*physiology ; Haplorhini ; Humans ; Male ; Preoptic Area/growth & development ; Rats ; Receptors, Estrogen/metabolism ; Sex Differentiation ; Testosterone/metabolism
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  • 58
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-08-24
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kolata, G B -- New York, N.Y. -- Science. 1979 Aug 24;205(4408):774-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/379998" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; France ; History, 20th Century ; Humans ; Mice ; Psychotropic Drugs/*history/metabolism/therapeutic use ; Rats ; Schizophrenia/drug therapy ; United States
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  • 59
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-10-26
    Description: When placed in a tank of water, aged rats (24 to 27 months old) showed marked impairments in swimming. Compared with young adult rats (3 to 4 months old), the older animals moved their limbs less vigorously and were less successful in keeping their heads above water. The young, but not old, rats maintained a position nearly horizontal to the water surface and planed across it. These movement dysfunctions of aged rats resemble those seen in young adult animals that have sustained injury to brain dopamine-containing neurons. The swimming impairments of the aged rats were reversed by the dopamine receptor stimulant apomorphine and by the biosynthetic precursor of dopamine, L-dopa. Thus, age-related alterations in brain dopaminergic systems may be responsible for some of the movement disturbances associated with senescence.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marshall, J F -- Berrios, N -- New York, N.Y. -- Science. 1979 Oct 26;206(4417):477-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/504992" target="_blank"〉PubMed〈/a〉
    Keywords: *Aging ; Animals ; Apomorphine/therapeutic use ; Levodopa/therapeutic use ; Male ; Movement Disorders/drug therapy/*physiopathology ; Rats ; Receptors, Dopamine/*physiology ; Swimming ; Time Factors
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  • 60
    Publication Date: 1979-05-11
    Description: In rats, a single injection of clomiphene citrate (Clomid) during pregnancy causes multiple abnormalities of the reproductive tract in the offspring and mothers. These abnormalities probably result from the ability of Clomid to cause long-term estrogenic stimulation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McCormack, S -- Clark, J H -- New York, N.Y. -- Science. 1979 May 11;204(4393):629-31.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/432668" target="_blank"〉PubMed〈/a〉
    Keywords: Abnormalities, Drug-Induced/*pathology ; Animals ; Clomiphene/*toxicity ; Fallopian Tubes/pathology ; Female ; Metaplasia ; Pregnancy ; Pregnancy, Animal/*drug effects ; Rats ; Uterine Diseases/chemically induced/pathology ; Vaginal Diseases/chemically induced
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  • 61
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-07-13
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Macklin, A W -- Welch, R M -- Cuatrecasas, P -- New York, N.Y. -- Science. 1979 Jul 13;205(4402):144, 146, 148.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/451584" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Carcinogens ; Liver Neoplasms/*chemically induced ; Mice ; Neoplasms, Experimental/chemically induced ; Phenacetin/*adverse effects/standards ; Rats
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  • 62
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-06-08
    Description: Rats were exposed to sodium nitrite in food or water at concentrations of 0, 250, 1000, and 2000 parts per million. Lymphoma was increased in all groups fed nitrite; the overall combined incidence was 5.4 percent in 573 control rats and 10.2 percent in 1383 treated rats. The mechanism of cancer induction did not appear to be through the formation of nitrosamines but through a more direct effect of nitrite on the lymphocyte.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Newberne, P M -- New York, N.Y. -- Science. 1979 Jun 8;204(4397):1079-81.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/451551" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Dose-Response Relationship, Drug ; Lymphocytes/drug effects ; Lymphoma/*chemically induced ; Neoplasms, Experimental/chemically induced ; *Nitrites/pharmacology ; Rats
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  • 63
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-08-10
    Description: A competitive inhibitor of colchicine binding to tubulin has been found in rat brain. Most of the inhibitor is associated with microsomes but some inhibitor, with an apparent molecular weight of approximately 250,000, is found in the cytosol. Both the microsomal and cytosol inhibitors are heat- and trypsin-sensitive, indicating that a protein moiety is required for activity. The microsomes bind tubulin directly; the microsomal and cytosol fractions both inhibit microtubule assembly in vitro. The inhibitor may function in the living cell to bind and sequester non-polymerized tubulin. Regulation of tubulin attachment to microsomes could then control the concentration of cytosolic tubulin available for microtubule assembly.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sherline, P -- Schiavone, K -- Brocato, S -- New York, N.Y. -- Science. 1979 Aug 10;205(4406):593-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/451622" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/*metabolism ; Colchicine/*metabolism ; Cytosol/physiology ; Glycoproteins/*metabolism ; Kinetics ; Microsomes/metabolism ; Microtubules/ultrastructure ; Nerve Tissue Proteins/*physiology ; Protein Binding/drug effects ; Rats ; Tubulin/*metabolism
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  • 64
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-08-17
    Description: Rats were trained to discriminate drug from no-drug conditions in a two-lever operant task. Moderately high dosages were used initially. Whenever the discrimination was learned, training was continued with progressively reduced dosages. Eventually the rats discriminated extremely low doses of phenobarbital, chlordiazepoxide, cyclazocine, and fentanyl.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Overton, D A -- New York, N.Y. -- Science. 1979 Aug 17;205(4407):720-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/462182" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chlordiazepoxide/pharmacology ; Cyclazocine/pharmacology ; Discrimination Learning/*physiology ; Dose-Response Relationship, Drug ; Fentanyl/pharmacology ; *Pharmacology ; Phenobarbital/pharmacology ; Rats ; Scopolamine Hydrobromide/pharmacology
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  • 65
    Publication Date: 1979-06-29
    Description: The concentrations of 1,25-dihydroxyvitamin D [1,25-(OH)2D], calcium, and phosphorus were measured in the serum of rats during pregnancy and at various stages of lactation. The concentration of 1,25-(OH)2D hormone increased almost two-fold during pregnancy and the latter part of lactation, but decreased to control levels or very low values immediately after birth and weaning, respectively. Furthermore, the concentration of 1,25-(OH)2D was inversely correlated with the concentration of calcium, suggesting that circulating 1,25-(OH)2D fluctuates in concert with calcium demands during the reproductive cycle. Parathyroidectomy in lactating rats caused a 70 percent inhibition of the normally observed 1,25-(OH)2D increase, indicating that parathyroid hormone, in response to changes in serum calcium, is a primary modulator of 1,25-(OH)2D during lactation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pike, J W -- Parker, J B -- Haussler, M R -- Boass, A -- Toverud, S V -- New York, N.Y. -- Science. 1979 Jun 29;204(4400):1427-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/451573" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Calcium/blood ; Dihydroxycholecalciferols/*blood ; Female ; Hydroxycholecalciferols/*blood ; *Lactation ; Parathyroid Glands/physiology ; Parathyroid Hormone/physiology ; Phosphorus/blood ; Pregnancy ; *Pregnancy, Animal ; Rats
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  • 66
    Publication Date: 1979-12-07
    Description: After mature rats that had been fed on a vitamin D3-deficient diet were injected with tritium-labeled 1,25-dihydroxyvitamin D3, radioactivity became concentrated in nuclei of luminal and cryptal epithelium of the duodenum, jejunum, ileum, and colon; in nuclei of the epithelium of kidney distal tubules including the macula densa, and in podocytes of glomeruli; in nuclei of the epidermis including outer hairshafts and sebaceous glands; and in nuclei of certain cells of the stomach, anterior and posterior pituitary, and parathyroid. These results reveal cell types that contain receptors for 1,25-dihydroxyvitamin D3 or metabolites of this compound both in known or hypothesized target tissues and in tissues that were previously unknown to participate in vitamin D3 metabolism.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stumpf, W E -- Sar, M -- Reid, F A -- Tanaka, Y -- DeLuca, H F -- New York, N.Y. -- Science. 1979 Dec 7;206(4423):1188-90.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/505004" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Autoradiography ; Cell Nucleus/metabolism ; Cytoplasm/metabolism ; Digestive System/*metabolism ; Dihydroxycholecalciferols/*metabolism ; Hydroxycholecalciferols/*metabolism ; Intestinal Mucosa/metabolism ; Kidney/*metabolism ; Male ; Parathyroid Glands/*metabolism ; Pituitary Gland/*metabolism ; Rats ; Skin/*metabolism ; Stomach/metabolism
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  • 67
    Publication Date: 1979-03-30
    Description: In the presence of low-intensity pulsed microwave radiation, at an average power density of 1 milliwatt per square centimeter, the response-rate-increasing effects of chlordiazepoxide were potentiated in rats. The behavioral effects of a drug can be modified by brief exposure to a low-level microwave field even when the radiation level alone has no apparent effects on the behavior.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Thomas, J R -- Burch, L S -- Yeandle, S S -- New York, N.Y. -- Science. 1979 Mar 30;203(4387):1357-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/424759" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Behavior, Animal/drug effects/*radiation effects ; Chlordiazepoxide/*pharmacology ; Dose-Response Relationship, Drug ; Dose-Response Relationship, Radiation ; Male ; *Microwaves ; Rats
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  • 68
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-03-23
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Warner, J S -- New York, N.Y. -- Science. 1979 Mar 23;203(4386):1194-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/424746" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Dose-Response Relationship, Drug ; Female ; Humans ; Ketones/*toxicity ; Nickel/*toxicity ; Occupational Medicine ; Pregnancy ; Rats ; *Teratogens
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  • 69
    Publication Date: 1979-09-21
    Description: The decrease in resting oxygen consumption induced by starvation was found to occur not only in euthyroid rats but also in hypothyroid and even in hypothyroid animals treated with triiodothyronine. Furthermore, the effectiveness of triiodothyronine was decreased when given to hypothyroid animals.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wimpfheimer, C -- Saville, E -- Voirol, M J -- Danforth, E Jr -- Burger, A G -- New York, N.Y. -- Science. 1979 Sep 21;205(4412):1272-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/224460" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Dose-Response Relationship, Drug ; Energy Metabolism/drug effects ; Hypothyroidism/metabolism ; Male ; Oxygen Consumption/*drug effects ; Rats ; Receptors, Cell Surface/drug effects ; Starvation/*metabolism ; Triiodothyronine/*pharmacology
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  • 70
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-04-27
    Description: The body distribution of gavaged or intravenously administered nitrate labeled with nitrogen-13 was studied in humans and rats with the following results: (i) the labeled compound is not quickly absorbed from the stomach; (ii) the concentration of the label increases inside the lower intestinal tract (cercum and large intestine) when ingested or intravenously injected; and (iii) humans and rats have the capacity to store a portion of the label in their bodies. These observation indicate that depletion of body stores, the passage of nitrate down the gut, or the secretion of nitrate into the intestinal lumen may be a better explanation of the urinary, ileal, and fecal concentrations of nitrate and nitrite recently measured in humans that a bacterial nitrification reaction in the intestines, as suggested by Tannenbbaum et al.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Witter, J P -- Gatley, S J -- Balish, E -- New York, N.Y. -- Science. 1979 Apr 27;204(4391):411-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/441728" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Gastric Mucosa/metabolism ; Humans ; Intestinal Absorption ; Intestines/metabolism ; Nitrates/blood/*metabolism ; Nitrites/metabolism ; *Nitrogen Radioisotopes ; Rats ; Tissue Distribution
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  • 71
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-08-17
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wedeen, R P -- New York, N.Y. -- Science. 1979 Aug 17;205(4407):725-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/462185" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Drinking Behavior/*drug effects ; Lead Poisoning/*physiopathology ; Lithium/*pharmacology ; Rats ; Water-Electrolyte Balance/drug effects
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  • 72
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-08-17
    Description: Platelet lysates obtained from blood of humans, dogs, and rats catalyzed the transamination of 4-aminobutyrate with 2-oxoglutarate as cosubstrate. Human platelet 4-aminobutyrate:2-oxoglutarate aminotransferase (36.5 +/- 3.2 picomoles per minute per milligram of platelet protein) resembled the brain enzyme in kinetic properties and in response to cofactors and inhibitors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉White, H L -- New York, N.Y. -- Science. 1979 Aug 17;205(4407):696-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/462176" target="_blank"〉PubMed〈/a〉
    Keywords: 4-Aminobutyrate Transaminase/*blood ; Animals ; Blood Platelets/*enzymology ; Brain/enzymology ; Dogs ; Enzyme Activation/drug effects ; Humans ; Kinetics ; Pyridoxal Phosphate/pharmacology ; Rats ; Substrate Specificity ; Transaminases/*blood ; gamma-Aminobutyric Acid/blood
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  • 73
    Publication Date: 1979-10-26
    Description: A single intrathecal injection of capsaicin depletes substance P from primary sensory neurons and causes a prolonged increase in the thermal and chemical pain thresholds of the rat but no apparent change in responses to noxious mechanical stimuli.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yaksh, T L -- Farb, D H -- Leeman, S E -- Jessell, T M -- New York, N.Y. -- Science. 1979 Oct 26;206(4417):481-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/228392" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Capsaicin/*pharmacology ; Fatty Acids, Unsaturated/*pharmacology ; Hot Temperature ; Injections, Spinal ; Movement/drug effects ; Nociceptors/drug effects ; Pain/*physiopathology ; Rats ; Spinal Cord/*metabolism ; Substance P/administration & dosage/*metabolism ; Synaptic Transmission/drug effects
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  • 74
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-07-20
    Description: Male rats consumed a diet containing 0, 12, or 48 percent sucrose on days 16 to 30 of life. Thereafter, they had simultaneous access to all three diets until day 63. No relationship was detected between sucrose consumption early in life and subsequent preference for sucrose. The onset of puberty was associated with a decreased appetite for sucrose among animals of both sexes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wurtman, J J -- Wurtman, R J -- New York, N.Y. -- Science. 1979 Jul 20;205(4403):321-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/451607" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Dietary Carbohydrates ; Food Preferences/*drug effects ; Male ; Rats ; Saccharin ; Sexual Maturation ; Sucrose/*pharmacology ; Taste
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  • 75
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-03-02
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Young, S N -- New York, N.Y. -- Science. 1979 Mar 2;203(4383):834.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/419407" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antidepressive Agents ; Brain Chemistry/*drug effects ; Choline/pharmacology ; Rats ; Tryptophan/*pharmacology
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  • 76
    Publication Date: 1979-01-26
    Description: Environmental lighting regulates numerous circadian rhythms, including the cycle in pineal serotonin N-acetyltransferase activity. Brief exposure of rats to light can shift the phase of this enzyme's circadian rhythm. Light also rapidly reduces nocturnal enzyme activity. Intraventricular injections of carbachol, a cholinergic agonist, can mimic both of these effects. Light and carbachol presumably act on the suprachiasmatic nucleus of the hypothalamus. These experiments demonstrate the feasibility of using a neuropharmacologic approach to the mechanisms underlying mammalian circadian rhythms.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zatz, M -- Brownstein, M J -- New York, N.Y. -- Science. 1979 Jan 26;203(4378):358-61.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/32619" target="_blank"〉PubMed〈/a〉
    Keywords: Acetyltransferases/metabolism ; Animals ; Biological Clocks/drug effects ; Carbachol/administration & dosage/*pharmacology ; Circadian Rhythm/*drug effects/radiation effects ; Injections, Intraventricular ; *Light ; Male ; Neurotransmitter Agents/pharmacology ; Pineal Gland/enzymology/*physiology ; Rats ; Serotonin
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  • 77
    Publication Date: 1980-06-27
    Description: The enzyme NADPH-cytochrome c (P-450) reductase was identified by indirect immunofluorescence in hepatocytes, bronchioles, and proximal tubules of liver, lung, and kidney, respectively, of rats and minipigs that had been injected with phenobarbital or saline. The distribution of this component of the cytochrome P-450-mediated microsomal system may be relevant to sites of drug toxicity and carcinogenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dees, J H -- Coe, L D -- Yasukochi, Y -- Masters, B S -- New York, N.Y. -- Science. 1980 Jun 27;208(4451):1473-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6770464" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Fluorescent Antibody Technique ; Kidney/drug effects/*enzymology ; Liver/drug effects/*enzymology ; Lung/drug effects/*enzymology ; Male ; NADPH-Ferrihemoprotein Reductase/*metabolism ; Organ Specificity ; Phenobarbital/*pharmacology ; Rats
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  • 78
    Publication Date: 1980-05-02
    Description: 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〉
    Keywords: 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
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  • 79
    Publication Date: 1980-11-07
    Description: An analog of luteinizing hormone-releasing hormone containing a gamma-lactam as a conformational constraint has been prepared with the use of a novel cyclization of a methionine sulfonium salt. The analog is more active as a luteinizing hormone-releasing hormone agonist that the parent hormone, and provides evidence for a bioactive conformation containing a beta-turn.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Freidinger, R M -- Veber, D F -- Perlow, D S -- Brooks, J R -- Saperstein, R -- New York, N.Y. -- Science. 1980 Nov 7;210(4470):656-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7001627" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Biological Assay ; Cells, Cultured ; Female ; *Gonadotropin-Releasing Hormone/analogs & derivatives ; Hydrogen Bonding ; Lactams ; Protein Conformation ; Rats ; Structure-Activity Relationship
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  • 80
    Publication Date: 1980-11-07
    Description: Cytochemical staining of demyelinated peripheral axons revealed two types of axon membrane organization, one of which suggests that the demyelinated axolemma acquires a high density of sodium channels. Ferric ion-ferrocyanide stain was confined to a restricted region of axon membrane at the beginning of a demyelinated segment or was distributed throughout the demyelinated segment of axon. The latter pattern represents one possible morphological correlate of continuous conduction through a demyelinated segment and suggests a reorganization of the axolemma after demyelination.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Foster, R E -- Whalen, C C -- Waxman, S G -- NS-15320/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1980 Nov 7;210(4470):661-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6159685" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Demyelinating Diseases/metabolism/*pathology ; Disease Models, Animal ; Ion Channels/*metabolism ; Male ; Neural Conduction ; Neurilemma/*metabolism/pathology ; Rats ; Staining and Labeling
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  • 81
    Publication Date: 1980-01-11
    Description: A new N-methylpurine riboside (doridosine), probably N1-Methylisoguanosine, was isolated from the digestive glands of a nudibranch. Doridosine produces prolonged hypotension and bradycardia in anesthetized rats, decreases the rate and the amplitude of contraction of guinea pig atria in vitro, and causes the heart rate in anesthetized mice to be reduced by 50 percent for many hours after which the animals recover completely.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fuhrman, F A -- Fuhrman, G J -- Kim, Y H -- Pavelka, L A -- Mosher, H S -- New York, N.Y. -- Science. 1980 Jan 11;207(4427):193-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7350655" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antihypertensive Agents/*isolation & purification ; Guanosine/*analogs & derivatives/isolation & purification/pharmacology ; Guinea Pigs ; Heart Rate/drug effects ; Mice ; Mollusca/analysis ; Rats
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  • 82
    Publication Date: 1980-05-02
    Description: Analysis of extracts of the bloodstream forms of Trypanosoma brucei showed that both DNA polymerase-alpha and DNA polymerase-beta activities were present. The detection of DNA polymerase-beta in T. brucei demonstrates the presence of this enzyme in unicellular organisms. DNA polymerase-beta is present also in Leishmania mexicana. The DNA polymerases in T. brucei are immunologically distinct from the host enzymes. The structural differences between the parasite and the host enzymes could be exploited for the development of agents to combat parasitic diseases.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chang, L M -- Cheriathundam, E -- Mahoney, E M -- Cerami, A -- New York, N.Y. -- Science. 1980 May 2;208(4443):510-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7367875" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Centrifugation, Density Gradient ; Chickens ; DNA Polymerase I/analysis ; DNA Polymerase II/analysis ; DNA Polymerase III/analysis ; DNA-Directed DNA Polymerase/*analysis ; Fishes ; Immune Sera ; Leishmania/*enzymology ; Molecular Weight ; Rabbits ; Rats ; Species Specificity ; Trypanosoma brucei brucei/*enzymology
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  • 83
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-11-07
    Description: Lanosterol, a cholesterol precursor that increases considerably in the platelets of rats treated with oral contraceptives, was incubated with either platelet-rich plasma or washed platelet suspension. After 2 minutes there was a remarkable dose-related increase in platelet activity. This platelet hyperactivity was measured by clotting time and platelet aggregation could not be reproduced by cholesterol or ethinylestradiol.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ciavatti, M -- Dumont, E -- Benoit, C -- Renaud, S -- New York, N.Y. -- Science. 1980 Nov 7;210(4470):642-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7433990" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Blood Coagulation/*drug effects ; Blood Platelets/*drug effects ; Contraceptives, Oral/*pharmacology ; Dose-Response Relationship, Drug ; Female ; Lanosterol/*pharmacology ; Platelet Aggregation/*drug effects ; Rats
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  • 84
    Publication Date: 1980-12-05
    Description: A new dopamine analog, 6,7-dihydroxy-2-dimethylaminotetralin (TL-99), was compared to apomorphine in three tests of dopaminergic function in the central nervous system. The tests, performed on rats, included production of changes in locomotor activity (involving both presynaptic and postsynaptic receptors), inhibition of dopa accumulation (quantifying presynaptic receptor activity), and the rotation model (quantifying postsynaptic receptor activation). Apomorphine was efficacious at both presynaptic and postsynaptic receptors, whereas TL-99 was much more efficacious at the presynaptic receptor. This result indicates not only that differences exist between presynaptic and postsynaptic dopamine receptors, but also that these differences may be exploited in the design of selective dopamine agonists.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Goodale, D P -- Rusterholz, D B -- Long, J P -- Flynn, J R -- Walsh, B -- Cannon, J G -- Lee, T -- GM 12675/GM/NIGMS NIH HHS/ -- GM-22365/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1980 Dec 5;210(4474):1141-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7444443" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Apomorphine/pharmacology ; Behavior, Animal/drug effects ; Brain/*drug effects ; Levodopa/metabolism ; Motor Activity/drug effects ; Naphthols ; Rats ; Receptors, Dopamine/*drug effects ; Synaptic Membranes/*drug effects ; *Tetrahydronaphthalenes
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  • 85
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-09-05
    Description: Many types of cells methylate phospholipids using two methyltransferase enzymes that are asymmetrically distributed in membranes. As the phospholipids are successively methylated, they are translocated from the inside to the outside of the membrane. When catecholamine neurotransmitters, lectins, immunoglobulins or chemotaxic peptides bind to the cell surface, they stimulate the methyltransferase enzymes and reduce membrane viscosity. The methylation of phospholipids is coupled to Ca2+ influx and the release of arachidonic acid, lysophosphatidylcholine, and prostaglandins. These closely associated biochemical changes facilitate the transmission of many signals through membranes, resulting in the generation of adenosine 3',5'-monophophate in many cell types, release of histamine in mast cells and basophils, mitogenesis in lymphocytes, and chemotaxis in neutrophils.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hirata, F -- Axelrod, J -- New York, N.Y. -- Science. 1980 Sep 5;209(4461):1082-90.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6157192" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenal Medulla/metabolism ; Animals ; Arachidonic Acids/metabolism ; Calcium/metabolism ; Cell Membrane/metabolism ; Chemotaxis, Leukocyte ; Histamine Release ; Lymphocyte Activation ; *Membrane Fluidity ; Membrane Lipids/*metabolism ; Methylation ; Phosphatidylcholines/metabolism ; Phosphatidylethanolamines/metabolism ; Phospholipids/*metabolism ; Rats ; Receptors, Adrenergic, beta/metabolism ; Receptors, Drug/*physiology ; S-Adenosylmethionine/metabolism
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  • 86
    Publication Date: 1980-01-04
    Description: Morphine and beta-endorphin inhibit the shaking response of pentobarbital-anesthetized rats to ice water. Stereotaxically guided administration of antibodies to cerebroside sulfate into the periaqueductal gray region, the most sensitive brain region in which to demonstrate inhibition of this response, antagonizes the effect of morphine and beta-endorphin. These results suggest that cerebroside sulfate may be an integral component of an opiate receptor in rat brain.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Craves, F B -- Zalc, B -- Leybin, L -- Baumann, N -- Loh, H H -- New York, N.Y. -- Science. 1980 Jan 4;207(4426):75-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6243189" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigen-Antibody Reactions ; Behavior, Animal/drug effects ; Biological Assay ; Brain/*immunology ; Cerebral Aqueduct ; Endorphins/*antagonists & inhibitors ; Male ; Morphine/*antagonists & inhibitors ; Pentobarbital/pharmacology ; Rats ; Receptors, Opioid/*immunology ; Sulfoglycosphingolipids/*immunology
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  • 87
    Publication Date: 1980-10-10
    Description: Photosynthesis of previtamin D3 can occur throughout the epidermis in the dermis when hypopigmented Caucasian skin is exposed to solar ultraviolet radiation. Once previtamin D3 is formed in the skin, it undergoes a temperature-dependent thermal isomerization that takes at least 3 days to complete. The vitamin D-binding protein preferentially translocates the thermal product, vitamin D3, into the circulation. These processes suggest a unique mechanism for the synthesis, storage, and slow, steady release of vitamin D3 from the skin into the circulation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Holick, M F -- MacLaughlin, J A -- Clark, M B -- Holick, S A -- Potts, J T Jr -- Anderson, R R -- Blank, I H -- Parrish, J A -- Elias, P -- AM25395-01/AM/NIADDK NIH HHS/ -- AM27334-01/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1980 Oct 10;210(4466):203-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6251551" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Carrier Proteins/metabolism ; Cholecalciferol/*biosynthesis ; Cholestadienols/*biosynthesis ; Dose-Response Relationship, Radiation ; Hot Temperature ; Humans ; Isomerism ; Photochemistry ; Rats ; Skin/cytology/*metabolism ; Ultraviolet Rays ; Vitamin D/metabolism ; Vitamin D-Binding Protein
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  • 88
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-10-03
    Description: Both natural (-)-morphine and its unnatural enantiomer (+)-morphine exert an excitatory action on electrically stimulated contractions of rat vas deferens. Preexposure to (-)-morphine results in cross-tolerance to the inhibitory action of beta-endorphin. (-)-Naloxone and its stereoisomer (+)-naloxone also exert an excitatory action, but only (-)-naloxone bocks the inhibtory action of beta-endorphin. Thus morphine exerts a dual action on a peripheral organ: one an inhibitory action mediated by the stereospecific endorphin receptor that is blocked stereospecifically by naloxone, the other an excitatory action mediated by a nonstereospecific receptor that is not blocked by naloxone. The opiate abstinence syndrome is seen as due to the unmasking of the excitatory action of opiates when its concomitant inhibitory influence is removed by selective blockade by naloxone or weakened by selective tolerance. The view that the rat vas deferens is devoid of morphine receptors is now seen as arising from a reverse example of morphine's dual action: the masking of the inhibitory action of morphine by its concomitant and more potent excitatory action.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jacquet, Y F -- DA 00367/DA/NIDA NIH HHS/ -- New York, N.Y. -- Science. 1980 Oct 3;210(4465):95-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6158098" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Drug Interactions ; Endorphins/pharmacology ; Male ; Morphine/antagonists & inhibitors/pharmacology ; Muscle Contraction/drug effects ; Naloxone/pharmacology ; Narcotics/*pharmacology ; Rats ; Receptors, Opioid/drug effects ; Stereoisomerism ; Substance P/pharmacology ; Vas Deferens/*drug effects
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  • 89
    Publication Date: 1980-12-05
    Description: Comparison was made of the distribution of the insulin receptor sites on adipocyte and liver plasma membranes by using ferritin-insulin. Two-thirds of the occupied insulin receptors on adipocytes occurred in groups of two or more whereas up to two-thirds of the receptors on liver occurred as single receptors. Ferritin-insulin did not cause aggregation of the receptor sites in either tissue. The naturally occurring groups of receptors on adipocyte membranes may play a role in the greater sensitivity of adipocytes to insulin.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jarett, L -- Schweitzer, J B -- Smith, R M -- AM 20097/AM/NIADDK NIH HHS/ -- T32 AM 07296/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1980 Dec 5;210(4474):1127-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7003710" target="_blank"〉PubMed〈/a〉
    Keywords: Adipose Tissue/*ultrastructure ; Animals ; Cell Membrane/ultrastructure ; Insulin/metabolism ; Liver/*ultrastructure ; Macromolecular Substances ; Membrane Fluidity ; Oxidation-Reduction ; Protein Binding ; Rats ; *Receptor, Insulin/metabolism ; Sulfhydryl Compounds
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  • 90
    Publication Date: 1980-11-21
    Description: 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〉
    Keywords: Animals ; *Antibodies ; Female ; Ganglia, Spinal/cytology/*embryology/growth & development ; Guinea Pigs ; Lactation ; Maternal-Fetal Exchange ; Milk/immunology ; Nerve Growth Factors/*immunology ; Pregnancy ; Rats
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  • 91
    Publication Date: 1980-10-31
    Description: 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〉
    Keywords: Animals ; Catecholamines/metabolism ; Female ; Hydrocortisone/*pharmacology ; Intestines/*embryology/innervation ; Maternal-Fetal Exchange ; Pregnancy ; Pregnancy, Animal/*drug effects ; Rats ; Reserpine/*pharmacology ; Sympathetic Nervous System/*embryology
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  • 92
    Publication Date: 1980-11-14
    Description: The organum vasculosum of the lamina terminalis has been implicated as the site of receptors mediating central responses of angiotensin II. Up to now, this had been based on indirect evidence, but direct visualization of angiotensin II at its site of action has now been achieved by the use of a biologically active fluorescent angiotensin II agonist. The ventricular surface of the organum vasculosum lamina terminalis showed intense fluorescence, which was virtually eliminated by an excess of unlabeled angiotensin II.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Landas, S -- Phillips, M I -- Stamler, J F -- Raizada, M K -- AM25295/AM/NIADDK NIH HHS/ -- HL14388/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1980 Nov 14;210(4471):791-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6254147" target="_blank"〉PubMed〈/a〉
    Keywords: Angiotensin II/*metabolism/physiology ; Animals ; Cerebral Ventricles/*metabolism ; Drinking Behavior/physiology ; Male ; Microscopy, Fluorescence ; Rats ; Receptors, Angiotensin/*metabolism ; Receptors, Cell Surface/*metabolism
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  • 93
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-07-11
    Description: The survival of isolated rat islets transplanted into diabetic mice was prolonged markedly by maintaining the rat islets in vitro at 24 degrees C for 7 days before transplantation and administering to the recipients a single injection of antiserum to mouse and rat lymphocytes shortly before transplantation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lacy, P E -- Davie, J M -- Finke, E H -- New York, N.Y. -- Science. 1980 Jul 11;209(4453):283-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6770465" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Blood Glucose/analysis ; Cell Survival ; Cells, Cultured ; Diabetes Mellitus, Experimental/*therapy ; *Immunosuppression ; *Islets of Langerhans Transplantation ; Lymphocytes/immunology ; Male ; Mice ; Mice, Inbred BALB C ; Rats ; Transplantation, Heterologous ; Transplantation, Isogeneic
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  • 94
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-11-21
    Description: Single implantation of microencapsulated islets into rats with streptozotocin-induced diabetes corrected the diabetic state for 2 to 3 weeks. The microencapsulated islets remained morphologically and functionally intact throughout long-term culture studies lasting over 15 weeks.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lim, F -- Sun, A M -- New York, N.Y. -- Science. 1980 Nov 21;210(4472):908-10.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6776628" target="_blank"〉PubMed〈/a〉
    Keywords: Alginates/*therapeutic use ; Animals ; Cell Survival ; Diabetes Mellitus, Experimental/*therapy ; *Islets of Langerhans Transplantation ; Permeability ; Rats ; Transplantation, Homologous
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  • 95
    Publication Date: 1980-08-15
    Description: The antihistaminic over-the-counter drug methapyrilene hydrochloride, mixed with food at a concentration of 0.1 percent, was administered to 50 male and 50 female Fischer rats. A second group of 50 male and 50 female rats was given the same treatment together with 0.2 percent of sodium nitrite added to the food. Almost all of the rats in both groups developed liver neoplasms, mainly hepatocellular carcinomas and cholangiocarcinomas. The first rat died with a liver neoplasm at the 43rd week. Over 50 percent of the rats in both groups had metastases from the carcinomas of the liver to distant organs. Control rats treated with nitrite only, or untreated, did not develop liver neoplasms. There was no discernible effect of nitrite on the carcinogenicity of methapyrilene hydrochloride.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lijinsky, W -- Reuber, M D -- Blackwell, B N -- New York, N.Y. -- Science. 1980 Aug 15;209(4458):817-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7403848" target="_blank"〉PubMed〈/a〉
    Keywords: Aminopyridines/*toxicity ; Animals ; *Carcinogens ; Drug Interactions ; Female ; Liver Neoplasms, Experimental/*chemically induced/pathology ; Male ; Methapyrilene/*toxicity ; Neoplasm Metastasis ; Nitrites ; Rats
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  • 96
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-08-29
    Description: Extracts from several different photocopies were mutagenic in the Ames Salmonella assay. The mutagenic behavior was similar for extracts from copies and corresponding toners indicating that toners are directly responsible for the mutagenicity. The mutagenicity is caused by at least two classes of compounds which may be present either alone or in combination in any toner.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lofroth, G -- Hefner, E -- Alfheim, I -- Mooller, M -- New York, N.Y. -- Science. 1980 Aug 29;209(4460):1037-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6996094" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biotransformation ; Carbon ; *Copying Processes ; Drug Evaluation, Preclinical/methods ; Microsomes, Liver/metabolism ; *Mutagens ; Photography ; Pyrenes/adverse effects ; Rats ; Salmonella typhimurium/drug effects
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  • 97
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-06-13
    Description: Sympathetic axons, normally innervating the extracerebral vasculature, sprout into denervated regions of the hippocampal formation after lesions of the medial septal nucleus or fimbria in adult female rats. Similar lesions in adult males also elicit the sympathetic ingrowth; however, the number of anomalous axons is greatly reduced and their distribution is altered. In adult males the sympathetic axons do not send out collaterals within the stratum oriens of region CA3 or the molecular layer or deep hilar regions of the area dentata, as they do in adult females. Lesions in juveniles of both sexes result in more vigorous sprouting than in their adult counterparts. In the young males the anomalous axons are distributed more extensively into the dentate molecular layer; in the young females the axons merely send out more collaterals within the same regions as in the adults. This sexually dimorphic response to central nervous system damage suggests either that the sprouting is affected by the hormonal environment of the mature hippocampal system or that this brain region, like the hypothalamus, may express permanent morphological or physiological differences as a result of exposure to sex steroids during development.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Loy, R -- Milner, T A -- New York, N.Y. -- Science. 1980 Jun 13;208(4449):1282-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7375941" target="_blank"〉PubMed〈/a〉
    Keywords: Aging ; Animals ; Axons/growth & development ; Denervation ; Female ; Gonadal Steroid Hormones/physiology ; Hippocampus/*cytology ; Male ; Neural Pathways/cytology ; Rats ; *Sex ; Sympathetic Nervous System/*cytology/growth & development
    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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  • 98
    Publication Date: 1980-10-10
    Description: A transient increase in ornithine decarboxylase activity and polyamine biosynthesis occurs in the intestinal mucosa of the newborn rat in the third week after birth. During this period, there is a rapid conversion of the mucosa from a fetal to a mature adult status. A similar increase in ornithine decarboxylase activity also accompanies the rapid recovery of the mucosa 1 week after an injury is induced by chemotherapy in adult rats. In vivo, alpha-difluoromethyl ornithine, a highly selective, enzyme-activated, irreversible inhibitor, suppresses these increases in mucosal ornithine decarboxylase and delays both intestinal mucosal maturation and recovery from injury. Thus increased ornithine decarboxylase activity, with the resultant increase in polyamine content, may play an essential role in intestinal mucosal maturation and regeneration in the rat.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lux, G D -- Marton, L J -- Baylin, S B -- 5-R01-18404/PHS HHS/ -- 5-T32-AM-07192-03/AM/NIADDK NIH HHS/ -- P50-HL-19157-01/HL/NHLBI NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1980 Oct 10;210(4466):195-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6774420" target="_blank"〉PubMed〈/a〉
    Keywords: Amine Oxidase (Copper-Containing)/metabolism ; Animals ; Carboxy-Lyases/*physiology ; Cell Differentiation ; Cell Division ; Cytarabine/pharmacology ; Intestinal Mucosa/cytology/drug effects/*physiology ; Ornithine Decarboxylase/*physiology ; Ornithine Decarboxylase Inhibitors ; Putrescine/metabolism ; Rats ; Spermidine/metabolism ; Wound Healing
    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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  • 99
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-01-11
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Macklin, A W -- Welch, R M -- New York, N.Y. -- Science. 1980 Jan 11;207(4427):129-30, 132.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7350647" target="_blank"〉PubMed〈/a〉
    Keywords: Aminopyrine/adverse effects/toxicity ; Animals ; Humans ; Mice ; Mutagens ; Phenacetin/administration & dosage/*adverse effects/toxicity ; Rats
    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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  • 100
    Publication Date: 1980-03-07
    Description: 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〉
    Keywords: 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
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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