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  • Animals
  • Biochemistry and Biotechnology
  • 1975-1979  (1,617)
  • 201
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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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    Electronic ISSN: 1095-9203
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  • 202
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-10-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marx, J L -- New York, N.Y. -- Science. 1979 Oct 26;206(4417):434-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/41320" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylcholine/metabolism ; Adrenergic Fibers/growth & development ; Animals ; Autonomic Nervous System/*growth & development ; Cell Communication ; Cell Differentiation ; Cells, Cultured ; Cholinergic Fibers/growth & development ; Nerve Growth Factors/physiology ; Neural Crest/cytology ; Neural Pathways/growth & development ; Neurotransmitter Agents/*metabolism ; Synaptic Transmission
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
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  • 203
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-04-06
    Description: Occluding junctions have been found between the lateral cell borders at the base of the rectum of Periplaneta americana. They appear as punctate membrane appositions in thin sections, and after incubation in physiological solutions containing lanthanum before fixation the inward penetration of tracer is impeded in this same basal area. Moreover, freeze-fracture studies of this region reveal simple linear ridges on fracture face P and grooves on fracture face E, which are similar to the less complex vertebrate tight junctions. The luminal clefts, which permit free inward diffusion of tracers, present no tight junctions, but do have septate junctions. These results support the contention that, contrary to earlier speculation, arthropods do possess tight junctions; these, rather than septate junctions, appear to form the morphological basis of at least some of the permeability barriers observed in invertebrates.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lane, N J -- New York, N.Y. -- Science. 1979 Apr 6;204(4388):91-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/432631" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cockroaches/*ultrastructure ; Epithelium/physiology/ultrastructure ; Freeze Fracturing ; Intercellular Junctions/*ultrastructure ; Periplaneta/*ultrastructure ; Rectum/physiology/ultrastructure ; Species Specificity ; Water-Electrolyte Balance
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  • 204
    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
    Print ISSN: 0036-8075
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  • 205
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-09-21
    Description: High-resolution autoradiography and fine structural analysis of adult newt heart tissue in long-term culture revealed that tritiated thymidine was concentrated in the nuclei of dedifferentiated myocardial cells. Mitotic chromosomes were observed in some of these cells. This demonstrates that adult amphibian myocardial cells in vitro are capable of DNA synthesis and mitosis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nag, A C -- Healy, C J -- Cheng, M -- New York, N.Y. -- Science. 1979 Sep 21;205(4412):1281-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/472744" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Division ; Cells, Cultured ; DNA/*biosynthesis ; *Mitosis ; Muscle Proteins/metabolism ; Myocardial Contraction ; Myocardium/*metabolism ; Salamandridae ; Time Factors
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  • 206
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-08-24
    Description: An abnormal, ipsilateral projection was formed by deflecting optic fibers that normally innervate the posterior part of one tectum into the anterior end of the opposite tectum. When anterior recipient tectum was simultaneously denervate, the deflected fibers formed a retinotopic map in this region that was reversed with respect to the anterior-posterior tectal axis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Meyer, R L -- New York, N.Y. -- Science. 1979 Aug 24;205(4408):819-20.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/462191" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Goldfish ; Optic Nerve/*physiology ; Retina/*innervation ; Superior Colliculi/*physiology ; Visual Pathways/*physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
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  • 207
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-11-30
    Description: The tertiary structures of all liganded hemoglobins in the R state differ in detail. Steric hindrance arising from nonbonded ligand-globin interactions affects the binding of ligands such as CO and cyanide which preferentially form linear axial complexes to heme; these ligands bind in a strained off-axis configuration. Ligands such as O2 and NO, which preferentially form bent complexes, encounter less steric hindrance and can bind in their (preferred) unstrained configuration. Linear complexes distort the ligand pockets in the R state (and by inference, in the T state) more than bent complexes. These structural differences between linear and bent complexes are reflected in the kinetic behavior of hemoglobin. Structural interpretation of this kinetic behavior indicates that the relative contributions of nonbonded ligand-globin interactions and nonbonded heme interactions to transition state free energies differ for linear and bent ligands. The relative contributions of these interactions to the free energy of cooperativity may also differ for linear and bent ligands. Thus the detailed molecular mechanism by which the affinity of heme is regulated differs for different ligands.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Moffat, K -- Deatherage, J F -- Seybert, D W -- New York, N.Y. -- Science. 1979 Nov 30;206(4422):1035-42.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/493990" target="_blank"〉PubMed〈/a〉
    Keywords: Allosteric Regulation ; Animals ; Heme/*metabolism ; Hemoglobins/metabolism ; Horses ; Kinetics ; Ligands ; Oxygen/*metabolism ; Oxyhemoglobins/*metabolism ; Protein Conformation ; Stereoisomerism ; Structure-Activity Relationship
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  • 208
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-06-01
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Morton, J F -- New York, N.Y. -- Science. 1979 Jun 1;204(4396):909.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/441746" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Esophageal Neoplasms/*chemically induced ; Humans ; Tannins/*adverse effects ; Tea/*adverse effects
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  • 209
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-09-28
    Description: We have developed a method that permits analysis of neovascular responses in the mouse cornea. Using this method we have demonstrated that both allogeneic lymphocytes and a variety of tumors can induce angiogenesis, but that only the latter appear capable of eliciting secondary capillary sprouting.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Muthukkaruppan, V -- Auerbach, R -- New York, N.Y. -- Science. 1979 Sep 28;205(4413):1416-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/472760" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cornea/*blood supply ; In Vitro Techniques ; Mice ; Mice, Inbred Strains ; Microcirculation ; Neoplasms, Experimental/*blood supply
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  • 210
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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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  • 211
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-07-27
    Description: By using two separate electrodes with tips inside a single feline motoneuron, current-voltage characteristics were studied during extracellular iontophoresis of noradrenaline. The usually observed hyperpolarization was accompanied by an increase in membrane resistance and became larger with polarizing and smaller with depolarizing currents. During large depolarizing current injections, the noradrenaline-induced potential reversed its direction, usually at a membrane potential of about -20 millivolts. These data are compatible with the concept that noradrenaline hyperpolarizes nerve cells by decreasing resting membrane conductances to sodium and potassium ions. The observation could also be explained by a nonspecific decrease in ion permeability that is associated with a hyperpolarization due to sodium pump activation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marshall, K C -- Engberg, I -- New York, N.Y. -- Science. 1979 Jul 27;205(4404):422-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/451613" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cats ; Membrane Potentials/drug effects ; Neurons/drug effects/*physiology ; Norepinephrine/*pharmacology ; Potassium/metabolism ; Sodium/metabolism ; Spinal Cord/drug effects/*physiology
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  • 212
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-01-05
    Description: An adenylate cyclase activated as much as 25-fold by low concentrations of octopamine has been identified in the firefly lantern. The relative potency of octopamine and various other amines in stimulating this enzyme, and effects of antagonists in blocking octopamine activation, correlate well with the known effects of these agents in affecting light production. In addition to suggesting a role for adenosine 3',5'-monophosphate (or pyrophosphate) in the neural control of firefly flashing, identification of this potent enzyme should facilitate the characterization of phenylethylamine receptors in excitable tissue.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nathanson, J A -- New York, N.Y. -- Science. 1979 Jan 5;203(4375):65-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/214856" target="_blank"〉PubMed〈/a〉
    Keywords: Adenylyl Cyclases/*metabolism ; Animals ; Beetles/*physiology ; Catecholamines/pharmacology ; Cyclic AMP/*biosynthesis ; Dose-Response Relationship, Drug ; Enzyme Activation/drug effects ; Kinetics ; Octopamine/*pharmacology ; Phentolamine/pharmacology ; Propranolol/pharmacology ; Receptors, Cell Surface/*drug effects ; Receptors, Neurotransmitter/*drug effects ; Structure-Activity Relationship
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  • 213
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-09-07
    Description: The principal reactions described in Guthrie and Horton's classic learning monograph appear to have been caused by the mere presence of the experimenters. Neither escape nor food reinforcement is necessary for the establishment of such responses. They are species-typical "greeting" reactions, readily elicited by the sight of human observers.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Moore, B R -- Stuttard, S -- New York, N.Y. -- Science. 1979 Sep 7;205(4410):1031-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/572990" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Behavior, Animal/*physiology ; Cats/*physiology ; Conditioning, Operant/physiology ; Humans ; Stereotyped Behavior/physiology
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  • 214
    Publication Date: 1979-11-09
    Description: When the visual cortex of a newborn kitten is removed, most neurons in the dorsal lateral geniculate nucleus degenerate, but a small population of large cells is spared. Electrophysiological recording revealed that detailed visual topography in the nucleus is abnormal and that single cells have unusually large receptive fields. These results suggest that optic axons deprived of their normal synaptic targets rearrange their connections to converge on local surviving neurons.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Murphy, E H -- Kalil, R -- New York, N.Y. -- Science. 1979 Nov 9;206(4419):713-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/493978" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Newborn/anatomy & histology ; Cats ; Functional Laterality ; Geniculate Bodies/*cytology ; Nerve Degeneration ; Visual Cortex/*cytology ; Visual Pathways/*cytology/growth & development
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  • 215
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-08-17
    Description: During development of the embryonic chick limb the skeletal pattern is laid out as cartilaginous primordia, which emerge in a proximodistal sequence over a period of 4 days. The differentiation of cartilage is preceded by changes in cellular contacts at specific locations in the precartilage mesenchyme. Under realistic assumptions, the biosynthesis and diffusion through the extracellular matrix of a cell surface protein, such as fibronectin, will lead to spatial patterns of this molecule that could be the basis of the emergent primordia. As cellular differentiation proceeds, the size of the mesenchymal diffusion chamber is reduced in descrete steps, leading to sequential reorganizations of the morphogen pattern. The successive patterns correspond to observed rows of skeletal elements, whose emergence, in theory and in practice, depends on the maintenance of a unique boundary condition at the limb bud apex.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Newman, S A -- Frisch, H L -- New York, N.Y. -- Science. 1979 Aug 17;205(4407):662-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/462174" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bone and Bones/*embryology ; Cell Differentiation ; Chick Embryo ; Diffusion ; Extremities/*embryology ; Growth Substances/physiology ; Mesoderm/cytology ; Models, Biological ; Muscles/embryology ; Mutation ; Wings, Animal/*embryology
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  • 216
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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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  • 217
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-06-22
    Description: Mice with the mutant gene tottering (tg, chromosome 8, autosomal recessive) show, in adolescence, abnormal bursts of bilaterally synchronous spike waves as revealed in electrocorticograms recorded over long periods. The spike waves are accompanied by behavioral "absence" attacks and intermittent focal motor seizures showing somatotopic progression. Cerebral metabolic activity during seizures was assayed by autoradiography of brain sections from mice injected intravenously with 14C-labeled 2-deoxyglucose. Metabolic activity was increased bilaterally in selected brainstem structures. Spontaneous electrocorticographic and clinical seizures of this general pattern were recognized hitherto only in humans.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Noebels, J L -- Sidman, R L -- New York, N.Y. -- Science. 1979 Jun 22;204(4399):1334-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/572084" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Animals ; Behavior/*physiology ; Brain/growth & development/physiopathology ; Electrocardiography ; Epilepsy/*genetics/physiopathology ; Humans ; Mice ; Mice, Neurologic Mutants/genetics/*physiology ; Neural Pathways/physiopathology ; Seizures/physiopathology ; Stereotyped Behavior/*physiology
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  • 218
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-11-02
    Description: Male Anopheles mosquitoes erect their antennal hairs prior to mating. The erectile mechanism resides in a unique annulus at the base of each hair whorl. It appears that the insect regulates the degree of hydration of this annulus. When the annulus is made to swell the attached hairs are pushed to their erect position.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nijhout, H F -- Sheffield, H G -- New York, N.Y. -- Science. 1979 Nov 2;206(4418):595-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/40308" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anopheles/*physiology/ultrastructure ; Behavior, Animal/physiology ; Hair/physiology ; Hydrogen-Ion Concentration ; Male ; Microvilli/physiology ; Movement ; Proteins/physiology ; Water
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  • 219
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-11-16
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nottebohm, F -- Arnold, A P -- New York, N.Y. -- Science. 1979 Nov 16;206(4420):769.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/493981" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Birds/*anatomy & histology ; Brain/*anatomy & histology ; Sex Differentiation ; Telencephalon/anatomy & histology
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  • 220
    Publication Date: 1979-03-30
    Description: The sodium-selective ligand 1,1,1-tris[1(1)-(2(1)-oxa-4(1)-oxo-5(1)-aza-5(1)-methyl)dodecanyl]propane dissolved in 3-nitro-o-xylene containing a small amount of the lipophilic anion tetrachlorophenyl borate was used as a liquid ion-exchanger in sodium-selective microelectrodes. The microelectrodes gave rapid, stable responses that were linear functions of the logarithm of sodium activity. They were tested under conditions approximating those to be expected in the cell interior, and the results indicated that they can be used to measure intracellular sodium activity without significant interference from intracellular potassium.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉O'Doherty, J -- Garcia-Diaz, J F -- Armstrong, W M -- New York, N.Y. -- Science. 1979 Mar 30;203(4387):1349-51.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/424756" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cytoplasm/*analysis ; Intestinal Mucosa/analysis ; Ionophores ; Ligands ; *Microelectrodes ; Potassium/analysis ; Sodium/*analysis ; Urodela
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  • 221
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-01-05
    Description: Echolocating bats determine distance to targets by the time delay between their emitted biosonar pulses and the returning echoes. By varying the delay between synthetic pulses and echoes in stimulus pairs at various repetition rates and durations, neurons have been found in the auditory cortex of the mustache bat (Pteronotus parnellii rubiginosus) which are sensitive to target range during the search, approach, and terminal phases of prey capture or landing. Two classes of range-sensitive neurons were found: (i) tracking neurons, whose best delay for response to an echo following the emitted pulse becomes shorter and narrower as the bat closes in on the target, and (ii) range-tuned neurons, whose best delay is constant, and which respond to the target only when it is within a certain narrow fixed range. Range-tuned neurons are specialized for processing echoes only during a particular period of the search, approach, or terminal phases of echolocation, and they provide support for a theory of ranging in bats that incorporates groups of neurons with a spectrum of preferred echo delays to detect target distance.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉O'Neill, W E -- Suga, N -- New York, N.Y. -- Science. 1979 Jan 5;203(4375):69-73.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/758681" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Animals ; Auditory Cortex/cytology/*physiology ; Chiroptera/*physiology ; Doppler Effect ; Echolocation/*physiology ; Neurons/physiology ; Orientation/*physiology
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  • 222
    Publication Date: 1979-11-02
    Description: Separate perfusions of canine coronary arteries with colored silicone-rubber compound reveal that in the region where two microcirculations abut, capillaries derived from individual large vessels are discrete, with no interconnections. Terminal homologous capillaries from loops rather than anastomosing with heterologous capillaries. This anatomic arrangement may account for discrete myocardial infarctions without ischemic border zones.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Okun, E M -- Factor, S M -- Kirk, E S -- New York, N.Y. -- Science. 1979 Nov 2;206(4418):565-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/493960" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Coronary Circulation ; Coronary Vessels/*anatomy & histology ; Dogs ; Microcirculation ; Myocardial Infarction/*pathology
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  • 223
    Publication Date: 1979-02-16
    Description: Exposure of conjugating Tetrahymena to a hyperosmotic shock blocks the exchange of gametic nuclei and produces self-fertilized exconjugants that are homozygous for their whole genome. Cells are sensitive to this induction during a brief period after meiosis. The high efficiency of the treatment and the fertility of the progeny make this a useful method for the isolation of induced recessive mutations and enhances the value of Tetrahymena as an animal-cell model system in which genetic dissection is practical. The sharp peak of sensitivity is useful in the study of those cellular mechanisms responsible for the independent handling of several functionally distinct nuclei during conjugation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Orias, E -- Hamilton, E P -- Flacks, M -- New York, N.Y. -- Science. 1979 Feb 16;203(4381):660-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/760210" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Nucleus/physiology ; Conjugation, Genetic ; Genes, Recessive ; Homozygote ; Mutation ; Osmotic Pressure ; Tetrahymena/*genetics
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  • 224
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-06-22
    Description: Echolocating bats (Eptesicus fuscus) can detect changes as small as 500 nanoseconds in the arrival time of sonar echoes when these changes appear as jitter or alternations in arrival time from one echo to the next. The psychophysical function relating the bat's performance to the magnitude of the jitter corresponds to the half-wave rectified cross-correlation function between the emitted sonar signals and the echoes. The bat perceives the phase or period structure of the sounds, which cover the 25- to 100-kilohertz frequency range, as these are represented in the auditory system after peripheral transformation. The acoustic image of a sonar target is apparently derived from time-domain or periodicity information processing by the nervous system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Simmons, J A -- New York, N.Y. -- Science. 1979 Jun 22;204(4399):1336-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/451543" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Auditory Perception/*physiology ; Chiroptera/*physiology ; Echolocation/*physiology ; Movement ; Orientation/*physiology ; Time Factors
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  • 225
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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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  • 226
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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〉Shubik, P -- Clayson, D B -- New York, N.Y. -- Science. 1979 Aug 24;205(4408):746, 748.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/462187" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Carcinogens ; *Drug Evaluation, Preclinical ; *National Institutes of Health (U.S.) ; United States
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  • 227
    Publication Date: 1979-07-13
    Description: Two different ultrastructural alterations were observed in liver cells of chimpanzees inoculated with plasma derived from two different patients with non-A, non-B hepatitis. During the acute phase of illness in one group of four chimpanzees, peculiar tubular structures, composed of two unit membranes with electron-opaque material in between, were observed in the cytoplasm of hepatocytes. In contrast, these structures were never detected in the liver cells of the second group of five chimpanzees that received the second inoculum, However, nuclear changes, usually associated with aggregates of 20- to 27-nanometer particles, were found in hepatocytes of the latter animals. Although these particles resembled viruses, they were not as uniform as small virus particles often appear. In five other chimpanzees inoculated with non-A, non-B hepatitis material not known to be related to the first two inocula, cytoplasmic structures were found in four, and nuclear structures were found in the remaining one. Thus, all 14 chimpanzees inoculated with transmissible non-A, non-B hepatitis agents could be classified as having either nuclear or cytoplasmic changes. These observations add support to epidemiologic data suggesting that there may be more than one agent of non-A, non-B hepatitis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shimizu, Y K -- Feinstone, S M -- Purcell, R H -- Alter, H J -- London, W T -- New York, N.Y. -- Science. 1979 Jul 13;205(4402):197-200.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/451589" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Nucleus/ultrastructure ; Cytoplasm/ultrastructure ; Hepatitis, Viral, Animal/*microbiology ; Hepatitis, Viral, Human/*microbiology ; Inclusion Bodies, Viral/ultrastructure ; Liver/microbiology/ultrastructure ; Microscopy, Electron ; Pan troglodytes
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  • 228
    Publication Date: 1979-03-09
    Description: The restriction enzymes Hpa II and Msp I both recognize the sequence 5'-CCGG (C, cytosine; G, guanine). However, Hpa II cuts mouse liver DNA to fragments four times larger than does Msp I. The size of DNA cut by Msp I is close to that predicted from base composition and nearest neighbor analysis. The most probable explanation of these results is that in mouse the site 5'-CCGG is highly methylated.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Singer, J -- Roberts-Ems, J -- Riggs, A D -- New York, N.Y. -- Science. 1979 Mar 9;203(4384):1019-21.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/424726" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; DNA/*metabolism ; DNA (Cytosine-5-)-Methyltransferase/metabolism ; DNA Restriction Enzymes/metabolism ; Liver/metabolism ; Methylation ; Mice ; Molecular Weight ; Substrate Specificity
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  • 229
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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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  • 230
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-06-22
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smith, R J -- New York, N.Y. -- Science. 1979 Jun 22;204(4399):1287-92.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/451534" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Assay/methods ; *Carcinogens ; Legislation as Topic ; Mice ; *National Institutes of Health (U.S.) ; Research Design/standards ; Research Support as Topic ; United States
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  • 231
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-03-02
    Description: Conditional methods are proposed for investigating the number and relationships of processes that are rate-limiting for the genesis of consecutive stages in a developmental sequence. These methods depend on the differential sensitivity of "timer" pathways to small changes in temperature and can be applied to any developmental sequence in which discrete stages can be reproducibly monitored with time. We have applied the methods to multicellular morphogenesis in the slime mold Dictyostelium discoideum and have obtained an unexpected tentative scheme for timer relationships. A minimum of six timers has been delineated, each specific for at least one morphological stage. The majority of these timers appear to be in parallel.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Soll, D R -- New York, N.Y. -- Science. 1979 Mar 2;203(4383):841-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/419408" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biological Clocks ; Cell Adhesion ; Cell Differentiation ; Dictyostelium/*cytology ; Embryo, Nonmammalian/*physiology ; *Models, Biological ; Morphogenesis ; Temperature
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  • 232
    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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  • 233
    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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  • 234
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-01-19
    Description: Human speech and animal sounds contain phonemes with prominent and meaningful harmonics. The biosonar signals of the mustache bat also contain up to four harmonics, and each consists of a long constant-frequency component followed by a short frequency-modulated component. Neurons have been found in a large cluster within auditory cortex of this bat whose responses are facilitated by combinations of two or more harmonically related tones. Moreover, the best frequencies for excitation of these neurons are closely associated with the constant-frequency components of the biosonar signals. The properties of these neurons make them well suited for identifying the signals produced by other echolocating mustache bats. They also show how meaningful components of sound are assembled by neural circuits in the central nervous system and suggest a method by which sounds with important harmonics (or formants) may be detected and recognized by the brain in other species, including humans.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Suga, N -- O'Neill, W E -- Manabe, T -- New York, N.Y. -- Science. 1979 Jan 19;203(4377):270-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/760193" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Animals ; Auditory Cortex/cytology/*physiology ; Auditory Pathways/physiology ; Auditory Perception/*physiology ; Chiroptera/*physiology ; Echolocation/physiology ; Neurons/physiology ; Time Factors
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  • 235
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-10-19
    Description: In echolocating bats, the primary cue for determining distance to a target is the interval between an emitted orientation sound and its echo. Whereas frequency is represented by place in the bat cochlea, no anatomical location represents of primary range. Target range is coded by the time interval between grouped discharges of primary auditory neurons in response to both the emitted sound and its echo. In the frequency-modulated-signal processing area of the auditory cortex of the mustache bat (Pteronotus parnellii rubiginosus), neurons respond poorly or not at all to synthesized orientation sounds or echoes alone but respond vigorously to echoes following the emitted sound with a specific delay from targets at a specific range. These range-tuned neurons are systemically arranged along the rostrocaudal axis of the frequency-modulated-signal processing area according to the delays to which they best respond, and thus represent target range in terms of cortical organization. The frequency-modulated-signal processing area therefore shows odotopic representation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Suga, N -- O'Neill, W E -- New York, N.Y. -- Science. 1979 Oct 19;206(4416):351-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/482944" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Auditory Cortex/physiology ; Auditory Threshold ; Behavior, Animal/physiology ; Chiroptera/*physiology ; *Echolocation ; Evoked Potentials ; Neurons/physiology ; *Orientation
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  • 236
    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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  • 237
    Publication Date: 1979-04-20
    Description: The compound 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) causes hepatocellular damage and porphyria in C57B1/6J mice, among a wide range of toxic effects. We compared the effect of TCDD toxicity in iron-deficient mice with that in mice receiving a normal diet. Porphyria did not develop in the iron-deficient animals, and these animals were also protected from hepatocellular damage and certain other toxic effects of TCDD.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sweeny, G D -- Jones, K G -- Cole, F M -- Basford, D -- Krestynski, F -- New York, N.Y. -- Science. 1979 Apr 20;204(4390):332-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/432648" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Dioxins/*toxicity ; Enzyme Induction ; Iron/*deficiency ; Liver/pathology ; Mice ; Microsomes, Liver/enzymology ; Mixed Function Oxygenases/metabolism ; Porphyrias/*chemically induced ; Tetrachlorodibenzodioxin/*toxicity ; Uroporphyrinogen Decarboxylase/metabolism
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  • 238
    Publication Date: 1979-12-14
    Description: The complete coding sequence for the constant region of the mouse gamma 2b immunoglobulin heavy chain and the 3' untranslated region has been determined. The coding portion of the sequence is 1008 nucleotides long (amino acid residues 114 to 449), and the 3' noncoding region contains 102 nucleotides preceeding the polyadenylate. An extra carboxyl-terminal lysine residue which had not been observed in the gamma 2b or other gamma subclass protein sequences occurs in the nucleotide sequence and is probably processed posttranslationally. A 17-nucleotide sequence occurs with slight variation twice in CH1 and once in CH2 domains in the same relative location but with different translational phase. This sequence may be the site of crossover in a gamma 2b . gamma 2a heavy chain variant, an indication of possible recombinational activity of some kind.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tucker, P W -- Marcu, K B -- Slightom, J L -- Blattner, F R -- New York, N.Y. -- Science. 1979 Dec 14;206(4424):1299-303.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/117548" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Biological Evolution ; Codon ; DNA, Recombinant ; Immunoglobulin Constant Regions/*genetics ; Immunoglobulin Heavy Chains/*genetics ; Immunoglobulin gamma-Chains/*genetics ; Immunoglobulins/*genetics ; Mice ; *Protein Biosynthesis ; RNA, Messenger/*genetics
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  • 239
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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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  • 240
    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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  • 241
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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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  • 242
    Publication Date: 1979-04-20
    Description: A study was made of the function of the intervening sequences in the ovalbumin gene, Radioactively labeled DNA probes for the intervening sequences were prepared and RNA's were isolated from whole cells, nuclei, and polysomes of estrogen-stimulated chick oviducts. The concentrations of messenger RNA (mRNA) transcripts from ovalbumin structural sequences (mRNAov) and transcripts corresponding to intervening sequences were then estimated by hybridization to cloned DNA probes. Oviduct tissue contains approximately 58,000 molecules of mRNAov sequences per tubular gland cell and most of these sequences are present in the cytoplasm. In contrast, there are 200 to 300 molecules of RNA per cell which are transcribed from the intervening sequences of the natural ovalbumin gene and almost all of these are found in the nucleus. The difference in distribution of structural and intervening sequence transcripts suggests that, unlike mature mRNA, the intervening sequences are not preferentially transported to cytoplasmic polysomes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tsai, M J -- Tsai, S Y -- O'Malley, B W -- New York, N.Y. -- Science. 1979 Apr 20;204(4390):314-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/432646" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Transport ; Cell Nucleus/metabolism ; Chickens ; Cytoplasm/metabolism ; *Genes ; In Vitro Techniques ; Nucleic Acid Precursors/*genetics/metabolism ; Ovalbumin/*genetics ; Oviducts ; Polyribosomes/metabolism ; RNA, Messenger/*genetics ; *Transcription, Genetic
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  • 243
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-11-30
    Description: Wild-type Chinese hamster V79 cells (6-thioguanine-sensitive) reduce the recovery of 6-thioguanine-resistant cells when they are cultured together at high densities, through a form of intercellular communication (metabolic cooperation). Cooperation is inhibited by 12-O-tetradecanoyl phorbol-13-acetate, rescuing the 6-thioguanine-resistant cells. These results may be useful in the study of an aspect of the mechanism of tumor promotion and in assaying for promoters.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yotti, L P -- Chang, C C -- Trosko, J E -- New York, N.Y. -- Science. 1979 Nov 30;206(4422):1089-91.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/493994" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Communication/*drug effects ; Cell Membrane/drug effects ; Cricetinae ; Dose-Response Relationship, Drug ; Drug Resistance ; Phorbol Esters/*pharmacology ; Phorbols/*pharmacology ; Structure-Activity Relationship ; Tetradecanoylphorbol Acetate/pharmacology ; Thioguanine/pharmacology
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  • 244
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-09-07
    Description: Research on pigeon homing suggests that magnetic field information is used for orientation. The ability of pigeons to sense magnetic fields may be associated with a small, unilateral structure between the brain and the skull which contains magnetic in what appears to be single domains.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Walcott, C -- Gould, J L -- Kirschvink, J L -- New York, N.Y. -- Science. 1979 Sep 7;205(4410):1027-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/472725" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/physiology ; Columbidae/*physiology ; Head/physiology ; *Magnetics ; Orientation/*physiology
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  • 245
    Publication Date: 1979-09-28
    Description: Mouse spinal neurons grown in tissue culture were used to examine the membrane mechanisms of action of the peptide substance P. Two functionally distinct actions were observed, one being a rapidly desensitizing excitation, and the other being a dose-dependent, reversible depression of excitatory responses to the putative amino acid neurotransmitter glutamate. These effects on excitability suggest that substance P may play more than one role in intercellular communication in the nervous system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vincent, J D -- Barker, J L -- New York, N.Y. -- Science. 1979 Sep 28;205(4413):1409-12.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/224464" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Communication ; Cells, Cultured ; Electric Conductivity ; Excitatory Amino Acid Antagonists ; Glutamates/pharmacology ; Membrane Potentials ; Mice ; Neural Inhibition ; Spinal Cord/cytology/*physiology ; Substance P/*physiology ; Synaptic Transmission
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  • 246
    Publication Date: 1979-04-13
    Description: The anterior cingulate cortex receives thalamic afferents mainly from the midline and intralaminar nuclei rather than the anterior thalamic nuclei. In contrast, the posterior cingulate cortex receives afferents primarily from the anterior thalamic nuclei and from extensive cortical areas in the frontal, parietal, and temporal lobes. These contrasting afferents may provide a structural basis for pain-related functions of the anterior cingulate cortex.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vogt, B A -- Rosene, D L -- Pandya, D N -- New York, N.Y. -- Science. 1979 Apr 13;204(4389):205-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/107587" target="_blank"〉PubMed〈/a〉
    Keywords: Afferent Pathways/cytology ; Animals ; Brain Mapping ; Cerebral Cortex/*cytology ; Gyrus Cinguli/*cytology/physiology ; Haplorhini ; Horseradish Peroxidase ; Macaca mulatta ; Thalamic Nuclei/*cytology
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  • 247
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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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  • 248
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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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  • 249
    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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  • 250
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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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  • 251
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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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  • 252
    Publication Date: 1979-07-13
    Description: Lidocaine infusion of a CA755 mammary adenocarcinoma growing in the hind leg of BDF1 mice results in a significant increase in the animals' survival when combined with heating for 1 hour in a 43.5 degrees C water bath. This ability of local anesthetics to prolong survival following hyperthermia is consistent with the hypothesis that increases in membrane fluidity influence sensitivity to heat. In view of the extensive clinical experience with local anesthetics, the delay between clinical application and the observation that they potentiate the action of hyperthermia in animals may be reduced.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yatvin, M B -- Clifton, K H -- Dennis, W H -- New York, N.Y. -- Science. 1979 Jul 13;205(4402):195-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/451588" target="_blank"〉PubMed〈/a〉
    Keywords: Adenocarcinoma/therapy ; Anesthetics, Local/*therapeutic use ; Animals ; Female ; *Hot Temperature ; Lidocaine/therapeutic use ; Mammary Neoplasms, Experimental/therapy ; Membrane Fluidity/drug effects ; Mice ; Neoplasms, Experimental/*therapy
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  • 253
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-06-22
    Description: Swiss 3T3 cells arrested in B0 (quiescent state) by reducing serum content of the medium all contain the same amount of DNA but vary in nuclear volume over approximately a twofold range. By use of flow microfluorimetry, scatterplots of nuclear volume versus DNA content were obtained in intervals after serum stimulation. The earliest cells to enter DNA synthesis were those with the largest nuclei, whereas cells with the smallest nuclei were among the latest. Regulation of cellular transit from G0 to the S phase was therefore, at least in part, deterministic, since all G0 cells did not have equal probabilities of entry into S at a given moment. All cells having the same nuclear volume did not initiate DNA synthesis at the same moment; therefore, factors other than nuclear volume must also influence this timing. Nuclear volume correlated with the maximum rate at which cells could enter S. The kinetic model of the cell cycle postulating a probabilistic event as solely responsible for entry into S thus appears too simple.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yen, A -- Pardee, A B -- New York, N.Y. -- Science. 1979 Jun 22;204(4399):1315-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/451539" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Cell Cycle ; Cell Division ; Cell Nucleus/physiology/*ultrastructure ; Cells, Cultured/*physiology/ultrastructure ; Clone Cells/ultrastructure ; DNA/biosynthesis ; Mice
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  • 254
    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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  • 255
    Publication Date: 1979-05-25
    Description: Monkeys of four species were trained to discriminate between sets of natural tonal calls of Japanese macaques (Macaca fuscata) by the position of a frequency-inflection peak or by initial pitch. The Japanese macaques consistently performed best on peak position and the other species on pitch. The results imply special strategies for perceptional processing of vocal sounds and suggest parallels with human speech perception.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zoloth, S R -- Petersen, M R -- Beecher, M D -- Green, S -- Marler, P -- Moody, D B -- Stebbins, W -- New York, N.Y. -- Science. 1979 May 25;204(4395):870-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/108805" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Auditory Perception/*physiology ; Haplorhini ; Macaca/*physiology ; Species Specificity ; Speech Perception/*physiology ; Vocalization, Animal/*physiology
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  • 256
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-07-28
    Description: The presence of polyunsaturated and saturated fatty acids in leukocytic membranes prompted study of their possible role in the induction of brain edema. Polyunsaturated fatty acids including sodium arachidonate, sodium linoleate, sodium linolenate, and docasahexaenoic acids induced edma in slices of rat brain cortex. This cellular edema was specific, since neither saturated fatty acids nor a fatty acid containing a single double bond had such effect.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chan, P H -- Fishman, R A -- New York, N.Y. -- Science. 1978 Jul 28;201(4353):358-60.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/663662" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arachidonic Acids ; Brain Edema/*chemically induced ; Cerebral Cortex ; Detergents ; Dose-Response Relationship, Drug ; *Fatty Acids, Unsaturated ; Granulocytes/physiology ; Hydroxy Acids ; In Vitro Techniques ; Prostaglandins ; Rats ; Sodium Dodecyl Sulfate ; Water-Electrolyte Imbalance/chemically induced
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  • 257
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-07-28
    Description: In a pack of ten wolves, one wolf behaved atypically and fought with several packmates. This wolf was shot when it approached the author. Within 4 weeks at least six other members of the pack were dead. Rabies was confirmed in the wolf that was shot and in two others that had not decomposed. Most of the wolves infected with rabies had sought or remained at familiar areas in the core area of their territory, which implies that they were not contacting neighboring packs. This was confirmed with an aerial survey. Arctic foxes, experiencing a regionwide rabies epizootic, were suspected vectors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chapman, R C -- New York, N.Y. -- Science. 1978 Jul 28;201(4353):365-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/566470" target="_blank"〉PubMed〈/a〉
    Keywords: Aggression ; Alaska ; *Animal Population Groups ; Animals ; *Animals, Wild ; Behavior, Animal ; *Carnivora ; Foxes ; Humans ; Rabies/transmission/*veterinary ; Social Behavior
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  • 258
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-01-13
    Description: Cellular coupling in the insect epidermis changes in a characteristic way during metamorphosis. In vitro, beta-ecdysone mimics the initial phase of these changes by increasing electrical coupling. Both adenosine 3',5'-monophosphate (cyclic AMP) and Ca2+ reverse natural and beta-ecdysone-stimulated changes, which suggests that ecdysone could work on communication through changes in cyclic AMP and Ca2+ levels. The transient changes in intercellular communication before metamorphosis may reflect the timing of the signals that trigger proliferation and the generation of new spatial patterns in the epidermis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Caveney, S -- New York, N.Y. -- Science. 1978 Jan 13;199(4325):192-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/202023" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Calcium/pharmacology ; *Cell Communication/drug effects ; Culture Techniques ; Cyclic AMP/pharmacology ; Ecdysterone/pharmacology ; Electric Conductivity ; Epidermis/cytology ; Intercellular Junctions/physiology ; Metamorphosis, Biological ; Tenebrio/cytology/*growth & development
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  • 259
    Publication Date: 1978-03-03
    Description: Visual response properties of superior collicular neurons of normal hamsters were compared with those of animals reared from birth to adulthood in either total darkness or with stroboscopic illumination. Directional selectivity was markedly reduced only in the strobe-reared animals, thus demonstrating visual plasticity in a system that develops apparently normally without visual experience.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chalupa, L M -- Rhoades, R W -- New York, N.Y. -- Science. 1978 Mar 3;199(4332):998-1001.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/622583" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; *Adaptation, Ocular ; Animals ; Cricetinae/growth & development/*physiology ; Dark Adaptation ; Evoked Potentials ; Mesocricetus/growth & development/physiology ; Photic Stimulation ; Superior Colliculi/growth & development/*physiology ; *Visual Perception
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  • 260
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-07-14
    Description: By injecting plastic microspheres of a specific size (3 to 4 micrometers) into the circulation and following their movement and distribution in the spleen, it was revealed how blood travels from the arterial capillaries to the venous sinuses. This method demonstrated that both open and closed circulation exist in the spleen and that about 90 percent of the blood takes the open route of circulation in the normal unanesthetized rabbit.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chen, L T -- New York, N.Y. -- Science. 1978 Jul 14;201(4351):157-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/663644" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Microcirculation ; Microspheres ; Rabbits ; Spleen/*blood supply
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  • 261
    Publication Date: 1978-09-08
    Description: Mutagens, distinguishable from benzo[a]pyrene and from mutagenic amino acid and protein pyrolysis products, are formed when ground beef is cooked in a home hamburger cooking appliance or when beef stock is concentrated, by boiling, to a paste known commercially as beef extract. "Well-done" hamburgers contain about 0.14 part per million of the mutagens, and beef bouillon cubes which contain beef extract about 0.1 part per million. Since such mutagens may be potentially carcionogenic and are formed during ordinary cooking procedures, their occurrence raises questions about possible risks to human health.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Commoner, B -- Vithayathil, A J -- Dolara, P -- Nair, S -- Madyastha, P -- Cuca, G C -- New York, N.Y. -- Science. 1978 Sep 8;201(4359):913-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/567374" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Benzopyrenes ; Cattle ; *Hot Temperature ; Isoelectric Point ; Meat/*adverse effects ; Meat Products/adverse effects ; *Mutagens/analysis
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  • 262
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-11-10
    Description: An extra eye primordium was implanted into the forebrain region of embryonic Rana pipiens. During development both normal and supernumerary optic tracts terminated within a single, previously uninnervated tectal lobe. Autoradiographic tracing of either the normal or supernumerary eye's projection revealed distinct, eye-specific bands of radioactivity running rostrocaudally through the dually innervated tectum. Interactions among axons of retinal ganglion cells, possibly mediated through tectal neurons, must be invoked to explain this stereotyped disruption of the normally continuous retinal termination pattern.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Constantine-Paton, M -- Law, M I -- New York, N.Y. -- Science. 1978 Nov 10;202(4368):639-41.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/309179" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anura ; Electrophysiology ; Eye/transplantation ; Rana pipiens ; Superior Colliculi/cytology/*embryology/growth & development ; Transplantation, Homologous ; Visual Pathways/*embryology/growth & development/physiology
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  • 263
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-12-01
    Description: A putative neurotransmitter, serotonin, may be used to transmit temporal information in the eye of Aplysia, because it can shift the phase of the circadian rhythm of spontaneous optic nerve impulses from the eye and the eye contains a significant quantity of serotonin. Serotonin acts either directly on the cell, or cells, containing the circadian pacemaker or on cells electronically coupled to the pacemaker cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Corrent, G -- McAdoo, D J -- Eskin, A -- New York, N.Y. -- Science. 1978 Dec 1;202(4371):977-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/309655" target="_blank"〉PubMed〈/a〉
    Keywords: 5-Hydroxytryptophan/pharmacology ; Animals ; Aplysia ; Circadian Rhythm/*drug effects ; Dopamine/pharmacology ; Eye/metabolism ; In Vitro Techniques ; *Ocular Physiological Phenomena ; Serotonin/metabolism/*pharmacology
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  • 264
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-05-19
    Description: Spined pyriform interneurons in community-reared jewel fish have more dendritic branches and spines in the deep tectal layers than those in isolates reared without visual-tactile contact with conspecifics. Furthermore, in the same dendritic loci in which the community-reared fish had more spines, the spine stems were shorter. The findings suggest that social stimulation induces localized formation of spines, which swell with synaptic activation. Shortening of the spine stem through elongated swelling of the spine head is likely to alter synaptic effectiveness through changes in electrotonic conductance.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Coss, R G -- Globus, A -- New York, N.Y. -- Science. 1978 May 19;200(4343):787-90.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/644322" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Dendrites/ultrastructure ; Fishes/*physiology ; Interneurons/*cytology/physiology ; Neural Pathways/cytology ; Social Behavior ; Superior Colliculi/*cytology ; Synapses/physiology/ultrastructure ; Vision, Ocular/physiology ; Visual Perception/*physiology
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  • 265
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-10-20
    Description: After 3 weeks of twice-daily administration of desipramine to rats, the frequency-response curve for field stimulation of adrenergic neurons in isolated left atrial strips was shifted markedly to the left and the efflux of [3H]norepinephrine was enhanced greatly. After 1 day of treatment, only slight shifts in the frequency-response curve and small increases in [3H]norepinephrine efflux occurred although inhibition of [3H]norepinephrine uptake was already maximal, and phenoxybenzamine caused a further shift to the left in the frequency-response curve similar to that which occurred after 3 weeks of desipramine treatment alone. A gradual decrease in the sensitivity of the presynaptic alpha receptor would explain the delay in the onset of the linical effect of the tricyclic antidepressants.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Crews, F T -- Smith, C B -- New York, N.Y. -- Science. 1978 Oct 20;202(4365):322-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/211589" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Desipramine/*pharmacology ; In Vitro Techniques ; Kinetics ; Neuromuscular Junction/drug effects ; Norepinephrine/*metabolism/pharmacology ; Phenoxybenzamine/pharmacology ; Rats ; Receptors, Adrenergic/*drug effects ; Receptors, Adrenergic, alpha/*drug effects ; Receptors, Adrenergic, beta/drug effects ; Synaptic Membranes/drug effects ; Synaptic Transmission/*drug effects ; Time Factors
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  • 266
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-09-29
    Description: The nudibranch mollusk Hermissenda crassicornis is normally attracted to a test light. Three days of training consisting of 50 trials per day of light paired with a rotational stimulus led to a significant increase, lasting for days, in the animal's response latency to enter a test light. The group that received light associated with rotation was significantly different from groups subjected to nonassociative control procedures. Modifications of well-known sensory networks may be related to a behavioral change that shares several operational features with associative learning.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Crow, T J -- Alkon, D L -- New York, N.Y. -- Science. 1978 Sep 29;201(4362):1239-41.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/694512" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Association Learning/*physiology ; Behavior, Animal/physiology ; Learning/*physiology ; Light ; Memory/*physiology ; Mollusca/*physiology ; Retention (Psychology)/*physiology
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  • 267
    Publication Date: 1978-06-30
    Description: Mercury concentrations in Pacific hake increase with fish size and with the latitude of collection. While the mercury-size trend is consistent with data for other species, the latitudinal trend is opposite to that reported for other fishes over the same geographical area. Consequently, latitudinal trends of mercury concentrations in fishes do not necessarily indicate trends of mercury concentrations in water. Food habits and metabolism may cause the observed variations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cutshall, N H -- Naidu, J R -- Pearcy, W G -- New York, N.Y. -- Science. 1978 Jun 30;200(4349):1489-91.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/663631" target="_blank"〉PubMed〈/a〉
    Keywords: Age Factors ; Animals ; Environment ; Fishes/*metabolism ; Mercury/*metabolism ; Water Pollutants/*metabolism ; Water Pollutants, Chemical/*metabolism
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  • 268
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-01-06
    Description: A Gram-negative, rod-shaped bacterium has been consistently isolated from grapevines with Pierce's disease. Grapevines inoculated with the bacterium developed Pierce's disease, and the bacterium was reisolated from the plants. The bacterium was serologically and ultrastructurallv indistinguishable from the one in naturally infected plants, and also indistinguishable from a bacterium isolated from almonds with almond leaf scorch disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Davis, M J -- Purcell, A H -- Thomson, S V -- New York, N.Y. -- Science. 1978 Jan 6;199(4324):75-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Plant Pathology, University of California, Berkeley, CA 94720, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17569487" target="_blank"〉PubMed〈/a〉
    Keywords: Agglutination Tests ; Animals ; Cell Wall/ultrastructure ; Gram-Negative Bacteria/cytology/immunology/*isolation & ; purification/pathogenicity ; Hemiptera/microbiology ; Insect Vectors/microbiology ; Male ; Mice ; Plant Diseases/*microbiology ; Prunus/microbiology ; Rabbits ; Vitis/*microbiology
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  • 269
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-02-03
    Description: The critical period for modifying the preferred direction in cat cortical units occurs earlier than that for monocular deprivation. The independence of the effects of these two types of deprivation from each other was tested by rearing six kittens with both reverse suture and reversed directional deprivation. The kittens were placed in a drum rotating in one direction with one eye open at ages 2 1/2 to 5 weeks; the drum rotation was reversed and the other eye opened when they were 5 to 12 weeks old. Recordings were then made in the visual cortex. The results were the sum of the effects of reverse suture and reversal of directional deprivation: most cells were driven by the eye that was open second, and most unidirectional cells preferred the direction to which the animals were exposed first. Consequently, many unidirectional cells preferred the first direction but were driven by the eye open second--a combination that the animal never saw during rearing. There was also an effect of ocular deprivation on directional properties and vice versa: reverse suture reduced the overall percentage of unidirectional cells, just as directional deprivation has been shown to affect the ocular dominance histogram. This result suggests that the same cells may be affected by both forms of deprivation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Daw, N W -- Berman, N E -- Ariel, M -- New York, N.Y. -- Science. 1978 Feb 3;199(4328):565-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/622560" target="_blank"〉PubMed〈/a〉
    Keywords: Age Factors ; Animals ; Cats ; Cell Differentiation ; Functional Laterality ; Motion Perception/physiology ; *Vision, Ocular ; Visual Cortex/cytology/*growth & development ; Visual Pathways/growth & development ; Visual Perception/physiology
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  • 270
    Publication Date: 1978-05-05
    Description: (S)-9-(2,3-Dihydroxypropyl)adenine, a novel nucleoside analog, the sugar moiety of which is replaced by an aliphatic chain, inhibits the replication in vitro of several DNA and RNA viruses, including vaccinia, herpes simplex (types 1 and 2), measles, and vesicular stomatitis. It is also effective in vivo in reducing the mortality rate of mice inoculated intranasally with vesicular stomatitis virus.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉De Clercq, E -- Descamps, J -- De Somer, P -- Holy, A -- New York, N.Y. -- Science. 1978 May 5;200(4341):UNKNOWN.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/205946" target="_blank"〉PubMed〈/a〉
    Keywords: Adenine/*analogs & derivatives/pharmacology ; Animals ; *Antiviral Agents ; Cytopathogenic Effect, Viral/drug effects ; Female ; Measles virus/drug effects ; Mice ; Simplexvirus/drug effects ; Vaccinia virus/drug effects ; Vesicular stomatitis Indiana virus/drug effects ; Virus Replication/*drug effects
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  • 271
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-07-21
    Description: The idea of four primary tastes has influenced our concept of the gustatory world of all animals. It has also been the basis for constructing theories of gustatory neural integration. Since natural chemical stimuli are complex mixtures to which responses are multineuronal, difficult questions about integration arise. Answers are usually framed in terms of "labeled line" or "across-fiber" hypotheses. Comparative studies of vertebrate and invertebrate taste reveal in all receptors universal basic parameters that bear on the controversy. Comparative studies also place in more accurate perspective diverse chemically related ecologies and behaviors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dethier, V G -- New York, N.Y. -- Science. 1978 Jul 21;201(4352):224-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/663651" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Evolution ; Brain/physiology ; Humans ; Species Specificity ; Taste/*physiology ; Taste Buds/*physiology ; Taste Threshold/physiology
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  • 272
    Publication Date: 1978-09-22
    Description: The hypothesis tested was that the effects of early experiences are asymmetrically distributed in the two brain hemispheres. Litters were either handled or not handled between birth and weaning, and the weanlings were reared in either laboratory cages or enriched environments between 21 and 50 days. When approximately 135 days old, animals within each of the four treatment groups had a right neocortical ablation, a left neocortical ablation, a sham operation, or no surgery. About 1 month later, all animals were given the open-field test for emotionality and exploratory behavior. Ablating either the right or left neocortex increased the activity scores of nonhandled controls, but there was no evidence of lateralization. However, the groups handled in infancy did show lateralization. Ablating the left brain did not significantly increase activity, but ablating the right brain caused extreme scores: handled rats without enrichment experience were the most active, and handled rats also placed into the enriched environment had near-zero scores in the open field.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Denenberg, V H -- Garbanati, J -- Sherman, D A -- Yutzey, D A -- Kaplan, R -- New York, N.Y. -- Science. 1978 Sep 22;201(4361):1150-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/684436" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Newborn/*physiology ; Brain/*physiology ; Cerebral Cortex/physiology ; Emotions/physiology ; *Environment ; Exploratory Behavior/physiology ; Female ; Functional Laterality/*physiology ; Handling (Psychology)/*physiology ; Male ; Motor Activity/physiology ; Rats
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  • 273
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-03-31
    Description: Inhibition of the release call in gravid female frogs facilitates maintenance of the male's clasp so that oviposition and spawning can occur. Arginine-8 vasotocin inhibits the release call by causing an accumulation of water and internal pressure.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Diakow, C -- New York, N.Y. -- Science. 1978 Mar 31;199(4336):1456-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/305115" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anura ; Female ; Hydrostatic Pressure ; Rana pipiens/*physiology ; Sexual Behavior, Animal/*drug effects ; Vasotocin/*pharmacology ; Vocalization, Animal/*drug effects ; Water-Electrolyte Balance/drug effects
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  • 274
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-01-06
    Description: Two doses of phenobarbital were given daily for 2 weeks to infant rats fed by intragastric cannulas. The larger dose (60 milligrams per kilogram of body weight) resulted in decreased spontaneous activity and increased responses to novel stimuli. The smaller dose (15 milligrams per kilogram) resulted in increased spontaneous activity and also an increase of responses to novel stimuli. The larger dose produced a 12 percent reduction in brain growth, while the smaller dose was associated with a 3 percent reduction in brain growth.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Diaz, J -- Schain, R J -- New York, N.Y. -- Science. 1978 Jan 6;199(4324):90-1.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Psychiatry, University of California, Los Angeles, CA 90024, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17569495" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Behavior, Animal/*drug effects ; Brain/*drug effects/growth & development ; Injections, Subcutaneous ; Light ; Male ; Motor Activity/*drug effects ; Noise ; Phenobarbital/*administration & dosage/blood/pharmacology ; Rats ; Rats, Wistar
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  • 275
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-04-28
    Description: Relations between calcium entry and activation of a calcium-dependent outward current during depolarization were examined under voltage clamp in dorid giant neurons injected with the calcium-sensitive photoprotein aequorin. Activation kinetics and amplitude of the slow calcium-dependent component were both found to be related to the rate and extent of free calcium accumulation and to the electromotive force acting on potassium ions, independent of the calcium activation kinetics. This indicates that the activation of the calcium-dependent outward current is more closely related to the transient intracellular accumulation of free calcium ions than to the movement of calcium through the plasma membrane during depolarization.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Eckert, R -- Tillotson, D -- New York, N.Y. -- Science. 1978 Apr 28;200(4340):437-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/644308" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Calcium/*metabolism ; In Vitro Techniques ; Kinetics ; Membrane Potentials ; Mollusca ; Neurilemma/physiology ; Neurons/*metabolism ; Potassium/*metabolism
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  • 276
    Publication Date: 1978-01-27
    Description: In isolated rabbit lungs perfused with solutions containing little or no carbonic anhydrase activity, nearly complete equilibration between H14CO3- and 14CO2 occurs during a single circulation. This equilibration can be inhibited by blocking pulmonary carbonic anhydrase with acetazolamide.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Effros, R M -- Chang, R S -- Silverman, P -- New York, N.Y. -- Science. 1978 Jan 27;199(4327):427-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/413195" target="_blank"〉PubMed〈/a〉
    Keywords: Acetazolamide/pharmacology ; Animals ; Bicarbonates/*blood/metabolism ; Carbon Dioxide/*blood ; Carbonic Anhydrases/*metabolism ; Lung/*enzymology/metabolism ; Perfusion ; Rabbits
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  • 277
    Publication Date: 1978-07-21
    Description: Silicone pellets containing d-amphetamine base were implanted subcutaneously in rats. These pellets release amphetamine continuously for at least 10 days. Several days after implantation, swollen dopamine axons concomitant with large decreases in tyrosine hydroxylase activity were observed in the caudate nucleus. Decreased tyrosine hydroxylase activity was still present 110 days after pellet removal in the caudate but not in several other brain regions, nor in the caudate of rats injected with an equivalent amount of amphetamine in daily injections. This implies that continuous amphetamine administration has a selective neurotoxic effect on dopamine terminals in the caudate.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ellison, G -- Eison, M S -- Huberman, H S -- Daniel, F -- New York, N.Y. -- Science. 1978 Jul 21;201(4352):276-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26975" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Catecholamines/*metabolism ; Caudate Nucleus/cytology/*drug effects/metabolism ; Dextroamphetamine/administration & dosage/*pharmacology ; Dopamine/*metabolism ; Drug Implants ; Male ; Norepinephrine/metabolism ; Rats ; Time Factors ; Tyrosine 3-Monooxygenase/*metabolism
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  • 278
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-03-17
    Description: Calcium, other divalent cations, and calcium antagonists were tested for their ability to alter ethanol-induced sleeping time, hypothermia, and behavioral intoxication in mice and rats. Calcium given intraventricularly significantly enhanced sleeping time and behavioral intoxication in a dose-related manner. The ionophores X537A and A23187 accentuated the effect of a low dose of calcium, whereas the calcium chelators EDTA and EGTA decreased sleeping time. Calcium also enhanced tertiary butanol- and chloral hydrate-induced sleeping time. The effects of cations on ethanol-induced hypothermia were less significant. The results suggest the existence of a central calcium pool that is involved in ethanol intoxication in rodents.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Erickson, C K -- Tyler, T D -- Harris, R A -- New York, N.Y. -- Science. 1978 Mar 17;199(4334):1219-21.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/343251" target="_blank"〉PubMed〈/a〉
    Keywords: Alcoholic Intoxication/*physiopathology ; Animals ; Body Temperature Regulation/drug effects ; Calcimycin/pharmacology ; Calcium/antagonists & inhibitors/*physiology ; Cations, Divalent ; Dose-Response Relationship, Drug ; Drug Synergism ; Female ; Humans ; Lasalocid/pharmacology ; Male ; Mice ; Movement/drug effects ; Rats
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  • 279
    Publication Date: 1978-03-31
    Description: A sustained-release device for use in ethanol dependence studies in mice is described. The Silastic device, dubbed SERT (sustained ethanol release tube), holds 0.35 milliliter of 95 percent ethanol (by volume) and is implanted under the skin of the back where it releases ethanol for up to 12 hours, with no observable tissue damage. The device may be adaptable to the release of other volatile liquids or drugs, in other animals.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Erickson, C K -- Koch, K I -- Mehta, C S -- McGinity, J W -- New York, N.Y. -- Science. 1978 Mar 31;199(4336):1457-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/564551" target="_blank"〉PubMed〈/a〉
    Keywords: Alcoholic Intoxication/etiology ; Alcoholism/*etiology ; Animals ; *Disease Models, Animal ; Drug Administration Schedule ; Drug Implants ; Drug Tolerance ; Ethanol/*administration & dosage ; Humans ; Mice ; Silicone Elastomers
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  • 280
    Publication Date: 1978-08-04
    Description: HIX virus cloned from Moloney leukemia virus stocks is a nondefective, leukemogenic, and amphotropic murine oncornavirus with a recombinant-type major glycoprotein. Although Moloney leukemia virus stocks generally contain little or no free amphotropic virus, dilution analysis of several virus stocks and the examination of virus progeny from individual foci revealed that HIX virus is present and functionally coated with ecotropic Moloney virus envelopes. Because most mice have serum factors that inactivate recombinant viruses, masking may represent a general survival mechanism for HIX as well as other analogous recombinant viruses.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fischinger, P J -- Blevins, C S -- Dunlop, N M -- New York, N.Y. -- Science. 1978 Aug 4;201(4354):457-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/663667" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Genes, Viral ; Glycoproteins/immunology ; Leukemia, Experimental/*microbiology ; Lymphoma/*microbiology ; Mice ; Mice, Inbred BALB C/microbiology ; Mice, Inbred Strains/microbiology ; Moloney murine leukemia virus/classification/*genetics/immunology ; Recombination, Genetic ; Species Specificity ; Viral Proteins/immunology
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  • 281
    Publication Date: 1978-01-20
    Description: Mice were trained in a passive (foot shock)avoidance task. When administered after training, the stimulants caffeine or nicotine blocked amnesia for the task that had been produced by injections of the protein synthesis inhibitor anisomycin given prior to training. With foot shock at a higher intensity, anisomycin did not produce amnesia by itself, but the administration of the depressants chloral hydrate or sodium phenobarbital after training did cause amnesia. Stimulants and depressants did not have an appreciable influence on the overall degree of protein synthesis inhibition produced by anisomycin. The results support the hypothesis that arousal after training is an important factor in the conversion of short-term to long-term memory.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Flood, J F -- Bennett, E L -- Orme, A E -- Rosenzweig, M R -- Jarvik, M E -- New York, N.Y. -- Science. 1978 Jan 20;199(4326):324-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/619461" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anisomycin/*pharmacology ; Avoidance Learning/*drug effects ; Brain/*drug effects ; Caffeine/pharmacology ; Chloral Hydrate/pharmacology ; Drug Interactions ; Male ; Memory/*drug effects ; Mice ; Nerve Tissue Proteins/biosynthesis ; Nicotine/pharmacology ; Phenobarbital/pharmacology ; Pyrrolidines/*pharmacology
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  • 282
    Publication Date: 1978-08-18
    Description: Cytoplasmic extracts of proliferating cells stimulate DNA synthesis in isolated nuclei of Xenopus laevis liver. When tested by the same assay, cytoplasmic extracts of resting cells are completely inactive. When cytoplasmic extracts are prepared from cell cycle-specific temperature-sensitive mutants arrestd in the G1 phase of the cell cycle by the nonpermissive temperature, they also fail to stimulate DNA synthesis in frog nuclei. The results indicate that, to stimulate DNA synthesis in isolated frog nuclei, essentially all information of G1 cells must be present.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Floros, J -- Chang, H -- Baserga, R -- New York, N.Y. -- Science. 1978 Aug 18;201(4356):651-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/675253" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Cell Cycle ; Cell Line ; Cell Nucleus/*metabolism ; Chickens ; Cytoplasm/physiology ; DNA/*biosynthesis ; Liver/ultrastructure ; Mutation ; Temperature ; Xenopus
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  • 283
    Publication Date: 1978-04-21
    Description: Single injections of 120 micrograms of methionine-enkephalin were made into various midbrain and forebrain structures in the rat. Analgesia was observed after injections into or near the ventral, caudal midbrain periaqueductal gray matter. Seizures and other pathological electroencephalogram (EEG) changes were seen with injections into or near the forebrain dorsomedial nucleus of the thalamus. No animals with midbrain injection sites showed EEG changes, and none with forebrain injection sites were analgesic. These data, taken together with other lines of evidence, suggest that enkephalin-induced analgesia and enkephalin-induced seizures are mediated by opiate receptors that are located in different brain areas and that are pharmacologically different.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Frenk, H -- McCarty, B C -- Liebeskind, J C -- New York, N.Y. -- Science. 1978 Apr 21;200(4339):335-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/204998" target="_blank"〉PubMed〈/a〉
    Keywords: *Analgesia ; Animals ; Brain/*drug effects ; Cerebral Aqueduct ; Dose-Response Relationship, Drug ; *Endorphins/pharmacology ; *Enkephalins/pharmacology ; Male ; Naloxone/pharmacology ; Rats ; Receptors, Opioid/drug effects ; Seizures/*chemically induced ; Thalamic Nuclei/*drug effects
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  • 284
    Publication Date: 1978-09-22
    Description: Perifusion experiments have shown that there is a discharge of inorganic phosphate into the medium when insulin secretion from isolated islets is stimulated by glucose. Histochemical and microprobe examination of resting pancreatic islets in the electron microscope shows a specific accumulation of inorganic phosphate adjacent to the plasmalemma and nucleolus of the B (beta) cells. This phossphate is lost from the cells during secretory stimulation of islets with high concentrations of glucose.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Freinkel, N -- Pedley, K C -- Wooding, P -- Dawson, R M -- New York, N.Y. -- Science. 1978 Sep 22;201(4361):1124-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/356269" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bicarbonates/pharmacology ; Electron Probe Microanalysis ; Glucose/*pharmacology ; In Vitro Techniques ; Islets of Langerhans/cytology/drug effects/*metabolism ; Microscopy, Electron ; Perfusion ; Phosphates/*metabolism ; Rats
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  • 285
    Publication Date: 1978-12-01
    Description: Small neurons of the substantia gelatinosa Rolandi and the subjacent dorsal horn of the spinal cord have been thought to exert a direct modulatory effect only on neurons located within a distance of a few spinal segemnts. By using the technique of retorograde transport of horseradish peroxidase, however, it has been found that in the rat a significant number of these cells, particularly those of the subjacent dorsal horn, ascend many spinal segments to the lateral cervical nucleus and to the lower brainstem. These data provide an anatomic basis for a role of substantia gelatinosa Rolandi and subjacent dorsal horn cells in madulating or contributing to sensory information transmission not only in nearby segments but in far distant structures.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Giesler, G J Jr -- Cannon, J T -- Urca, G -- Liebeskind, J C -- New York, N.Y. -- Science. 1978 Dec 1;202(4371):984-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/715454" target="_blank"〉PubMed〈/a〉
    Keywords: Afferent Pathways/cytology ; Animals ; Brain Stem/*cytology ; Male ; Rats ; Spinal Cord/*cytology/physiology ; Substantia Gelatinosa/cytology/physiology
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  • 286
    Publication Date: 1978-01-27
    Description: A nonpeptide morphine-like compound (MLC) which cross reacts with morphine-specific antibodies has been localized with the use of immunocytochemistry. This morphine-like compound is found in neuronal perikarya or processes (or both) in nuclei related to vestibular, cerebellar, and raphe systems.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gintzler, A R -- Gershon, M D -- Spector, S -- New York, N.Y. -- Science. 1978 Jan 27;199(4327):447-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/339350" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Brain Chemistry ; Cerebellum/analysis ; Cerebral Aqueduct/analysis ; Cross Reactions ; Immunoenzyme Techniques ; Mice ; Morphine/*immunology ; Raphe Nuclei/analysis ; Vestibular Nuclei/analysis
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  • 287
    Publication Date: 1978-05-19
    Description: A flame retardant used in children's sleepwear, tris-(1,3-dichloro-2-propyl)phosphate (Fyrol FR2) is a mutagen in the Salmonella-mammalian tissue homogenate test after it has been activated by mouse or rat liver homogenate. The expected enzymatic hydrolysis product, 1,3-dichloro-2-propanol, is similarly a mutagen after activation by liver homogenate. A proposed metabolite of the flame retardant, 1,3-dichloro-2-propanone, is a potent mutagen in the absence of such activation. A flame retardant with similar structure, tris-(2,3-dibromopropyl)phosphate (tris-BP), was shown previously to be a mutagen, to cause sterility in animals, to be a carcinogen, and to be absorbed through human skin. These and other flame retardants have characteristic nuclear magnetic resonance spectra that can be used to determine which flame retardant is present in commercially purchased sleepwear. Sleepwear treated with tris-BP, Fyrol FR2, and other chemical additives was being sold in late 1977.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gold, M D -- Blum, A -- Ames, B N -- New York, N.Y. -- Science. 1978 May 19;200(4343):785-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/347576" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biotransformation ; Flame Retardants/*toxicity ; Hydrocarbons, Chlorinated/toxicity ; Liver/metabolism ; Mice ; *Mutagens ; Organophosphorus Compounds/*toxicity ; Salmonella typhimurium/drug effects ; Structure-Activity Relationship
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  • 288
    Publication Date: 1978-03-10
    Description: Three adult male rhesus monkeys were tested daily with intact adult female partners over the course of four or five mentstrual cycles. The males were made permanently anosmic by chemical ablation of the olfactory epithelium after the second or fourth cycle was completed. All males continued to display typical cycles of copulation with their partners after the anosmia procedures, with the shortest latencies to ejaculation occurring during the periovulatory phase of the partner's ovulatory cycle. Hence, female attractivity and cyclic copulatory performance of rhesus monkeys are not dependent upon olfactory signals.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Goldfoot, D A -- Essock-Vitale, S M -- Asa, C S -- Thornton, J E -- Leshner, A I -- New York, N.Y. -- Science. 1978 Mar 10;199(4333):1095-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/415362" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Copulation/*physiology ; Female ; Haplorhini ; Macaca/*physiology ; Macaca mulatta/*physiology ; Male ; Menstruation ; *Odors ; Olfaction Disorders ; Vasectomy
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  • 289
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-09-15
    Description: The retinal pigment epithelium of RCS rats, previously thought not to phagocytize photoreceptor outer segments, exhibited a peak of phagocytosis in vivo when animals were kept under conditions of cyclic lighting (12 hours of darkness and 12 hours of light). The peak occurred at 1 hour after the onset of light, with maximum and minimum levels of phagocytosis averaging about 5 percent of that found in the pigment epithelium of Osborn-Mendel rats used as a control. Eyecups that were obtained from Osborn-Mendel rats and maintained for up to 3 hours in organ culture demonstrated levels of phagocytosis that were sevenfold greater than those of unincubated controls. Likewise a tenfold increase occurred in incubated as opposed to unicubated RCS eyes, raising the possibility that phagocytosis could be experimentally stimulated in vivo.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Goldman, A I -- O'Brien, P J -- New York, N.Y. -- Science. 1978 Sep 15;201(4360):1023-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/567376" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Count ; Circadian Rhythm ; Organ Culture Techniques ; Phagocytes/ultrastructure ; *Phagocytosis ; Pigment Epithelium of Eye/*metabolism/ultrastructure ; Rats ; Rats, Inbred Strains/*metabolism ; Time Factors
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  • 290
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-03-31
    Description: Hematopoietic cells isolated from the endosteal bone surface, that is,the endosteal marrow cells, were found to consist mainly (60 to 80 percent) of lymphoid and late-stage normoblast-like cells. Unlike the cells they resemble, the endosteal marrow cells showed an affinity for Sudan black, demonstrable nucleoli (Feulgen reaction), and an absence of hemoglobin. Assays showed that over one-half of the endosteal marrow cell population may be the colony-forming units, the CFU-S of Till and McCulloch. Thus, high concentrations of stem cells could be obtained from the endosteal bone surface by means of the present isolation technique.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gong, J K -- New York, N.Y. -- Science. 1978 Mar 31;199(4336):1443-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/75570" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Bone Marrow Cells ; Cell Nucleolus/ultrastructure ; Female ; Hematopoiesis ; Hematopoietic Stem Cells/*cytology ; Lymphocytes/ultrastructure ; Male ; Mice ; Rats ; Spleen/cytology ; Staining and Labeling
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  • 291
    Publication Date: 1978-05-19
    Description: Insulin labeled with iodine-125 binds to receptors on isolated rat hepatocytes. At low temperatures initial binding is restricted to the plasma membrane as detected by direct quantitative autoradiographic analysis with the electron microscope. With increasing time and temperature of incubation there is a systematic and progressive translocation of autoradiographic grains to a highly limited area of the cell periphery representing no more than 15% of the radius of the cell.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gorden, P -- Carpentier, J L -- Freychet, P -- LeCam, A -- Orci, L -- New York, N.Y. -- Science. 1978 May 19;200(4343):782-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/644321" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Membrane/metabolism ; Endocytosis ; Insulin/*metabolism ; Kinetics ; Liver/*metabolism/ultrastructure ; Lymphocytes/metabolism ; Lysosomes/metabolism ; Molecular Weight ; Rats ; Receptor, Insulin/*metabolism
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  • 292
    Publication Date: 1978-02-17
    Description: Command neurons that cause rhythmic feeding behavior in the marine mollusc Pleurobranchaea californica have been identified in the cerebropleural ganglion (brain). Intracellular stimulation of single command neurons in isolated nervous systems, semi-intact prepartions, and restrained whole animals causes the same rhythmic motor output pattern as occurs during feeding. During this motor output pattern, action potentials recorded intracellularly from the command neurons occur in cyclic bursts that are phase-locked with the feeding rhythm. This modulation results from repetitive, alternating bursts of excitatory and inhibitory postsynaptic potentials, which are caused at least in part by synaptic feedback to the command neurons from identified classes of neurons in the feeding network. Central feedback to command neurons from the motor network they excite provides a possible general physiological mechanism for the sustained oscillation of neural networks controlling cyclic behavior.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gillette, R -- Kovac, M P -- Davis, W J -- New York, N.Y. -- Science. 1978 Feb 17;199(4330):798-801.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/622571" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Animals ; *Feedback ; Feeding Behavior/physiology ; Ganglia/physiology ; In Vitro Techniques ; Mollusca/*physiology ; Motor Neurons/*physiology ; Nerve Net/*physiology ; *Nervous System Physiological Phenomena ; Neurons/*physiology ; Periodicity ; Synapses/physiology
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  • 293
    Publication Date: 1978-07-28
    Description: This experiment examined the effects on memory of various amnestic treatments in animals earlier treated with the alpha-adrenergic antagonist phenoxybenzamine (PBZ). Thirty minutes before being trained in a one-trial inhibitory (passive) avoidance task, animals received an injection of PBZ or saline. Immediately after training, each animal received one of the following amnestic treatments: stimulation of the frontal cortex or amygdala, pentylenetetrazol, diethyldithiocarbamate, or cycloheximide. In control animals, each treatment produced retrograde amnesia. However, PBZ-treated animals did not develop amnesia. These findings suggest that there may be a common neurobiological mechanism underlying the amnesias produced by many treatments.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gold, P E -- Sternberg, D B -- New York, N.Y. -- Science. 1978 Jul 28;201(4353):367-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/208153" target="_blank"〉PubMed〈/a〉
    Keywords: Amnesia/*etiology ; Amnesia, Retrograde/*etiology/prevention & control ; Amygdala/physiopathology ; Animals ; Avoidance Learning/drug effects ; Cerebral Cortex/physiopathology ; Cycloheximide/antagonists & inhibitors ; Ditiocarb/antagonists & inhibitors ; Electric Stimulation ; Humans ; Memory/*drug effects ; Mice ; Phenoxybenzamine/*pharmacology ; Rats ; Seizures/complications
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  • 294
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-11-10
    Description: The collagens of all major invertebrate phyla have been studied, but characterization has been thorough in only a few classes and in no case in the detail (such as sequence analysis) known for vertebrate collagen. Biochemical data on insect collagen are particularly sparse. Invertebrate and vertebrate collagens are strikingly similar, with some notably unique features in annelids and nematodes. Present data do not support the suggestion that invertebrate collagens resemble vertebrate basement membrane collagen. In invertebrates, as in vertebrates, collagens of specific tissues show differenes that probably reflect individual tissue requirements.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Adams, E -- New York, N.Y. -- Science. 1978 Nov 10;202(4368):591-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/212833" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Carbohydrates/analysis ; Collagen/*analysis ; Glycoproteins/analysis ; Invertebrates/*analysis/enzymology ; Macromolecular Substances ; Molecular Weight ; Polymorphism, Genetic ; Procollagen-Proline Dioxygenase/metabolism ; Species Specificity
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  • 295
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-08-11
    Description: Diet-induced atherosclerosis developed more extensively in vasectomized cynomolgus monkeys (Macaca fascicularis) than in sham-vasectomized control monkeys fed the same diet. The effect was most pronounced in the abdominal aortas, carotid arteries, distal segments of the coronary arteries, and intracranial cerebral arteries. Antibodies to sperm developed in all vasectomized monkeys, and complement and immunoglobulins were associated with atherosclerotic plaques in some of the vasectomized animals. The immunological response to sperm antigens that often accompanies vasectomy may exacerbate atherosclerosis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Alexander, N J -- Clarkson, T B -- New York, N.Y. -- Science. 1978 Aug 11;201(4355):538-41.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/96532" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arteries/immunology/pathology ; Arteriosclerosis/*etiology/immunology/pathology ; Autoantibodies ; Cholesterol/metabolism ; Cholesterol Esters/metabolism ; Diet, Atherogenic ; Haplorhini ; Macaca fascicularis ; Male ; Spermatozoa/immunology ; Vasectomy/*adverse effects
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  • 296
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-08-11
    Description: Rhesus monkeys were allowed to choose between intravenous injections of cocaine and food reinforcement for lever pressing. A choice trial was available every 15 minutes continuously for 8 days. The animals chose cocaine almost exclusively, which resulted in high cocaine intake, decreased food intake, weight loss, and marked behavioral toxicity. The study provides evidence of the reinforcing efficacy of cocaine.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Aigner, T G -- Balster, R L -- New York, N.Y. -- Science. 1978 Aug 11;201(4355):534-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/96531" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Behavior, Animal/drug effects ; Body Weight ; Choice Behavior/*drug effects ; Cocaine/*pharmacology ; Decision Making/*drug effects ; Feeding Behavior/*drug effects ; Haplorhini ; Macaca mulatta ; Male ; Posture ; *Reinforcement (Psychology)
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  • 297
    Publication Date: 1978-02-17
    Description: Amantadine hydrochloride decreases the sensitivity of denervated mammalian muscle to iontophoretically applied acetylcholine. The drug depresses the amplitude of the end-plate current and reverses the slope of the relation between half-decay time and membrane potential suggesting that it alters the ionic conductance that is mediated by the acetylcholine receptor. Binding studies confirm that amantadine acts on the ion conductance modulator rather than the acetylcholine receptor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Albuquerque, E X -- Eldefrawi, A T -- Eldefrawi, M E -- Mansour, N A -- Tsai, M C -- New York, N.Y. -- Science. 1978 Feb 17;199(4330):788-90.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/622570" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylcholine/metabolism/*physiology ; Amantadine/*pharmacology ; Animals ; Electric Conductivity ; Electric Organ/drug effects/metabolism/physiology ; Fishes ; In Vitro Techniques ; Membrane Potentials/drug effects ; Motor Endplate/drug effects/metabolism/physiology ; Muscle Denervation ; Muscles/innervation/metabolism ; *Neuromuscular Blocking Agents ; Neuromuscular Junction/drug effects/metabolism/physiology ; Rats ; Receptors, Cholinergic/*drug effects ; Receptors, Nicotinic/*drug effects/metabolism/physiology ; Toxins, Biological/metabolism
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  • 298
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-09-15
    Description: Female savanna baboons (Papio cynocephalus) had a longer postpartum amenorrhea and thereafter cycled longer before conceiving if their previous infant survived than if that infant died. Among mothers of surviving infants, differences in maternal care produced differences in age of weaning and age of independence but did not result in differences in interbirth intervals.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Altmann, J -- Altmann, S A -- Hausfater, G -- New York, N.Y. -- Science. 1978 Sep 15;201(4360):1028-30.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/98844" target="_blank"〉PubMed〈/a〉
    Keywords: Amenorrhea ; Animals ; Female ; Haplorhini ; Maternal Behavior ; Papio/*physiology ; *Postpartum Period ; Pregnancy ; *Reproduction ; Time Factors ; Weaning
    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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  • 299
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-07-14
    Description: Using cytotoxic serums obtained from multiparous cows or by alloimmunization, we have detected 11 lymphocyte antigens controlled by codominant alleles at a serologically defined locus called BoLA-A (bovine lymphocyte antigens). This locus, along with the lymphocyte defined loci previously reported, establishes the existence of a major histocompatibility system of cattle.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Amorena, B -- Stone, W H -- New York, N.Y. -- Science. 1978 Jul 14;201(4351):159-60.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/663645" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Animals ; Cattle/genetics/*immunology ; Female ; Gene Frequency ; Genetic Linkage ; *Histocompatibility Antigens/genetics ; *Isoantigens/genetics ; Lymphocytes/*immunology ; Male
    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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  • 300
    Publication Date: 1978-09-01
    Description: Multitubular enzyme reactors with immobilized phenylalanine ammonia lyase were tested in vitro and in vivo for depletion of phenylalanine in circulating blood. Sustained reduction of phenylalanine was achieved in less than 30 minutes. A 50% decrease of phenylalanine was obtained with a 2-hour application of enzyme reactors and was maintained for more than 2 days. Similar enzyme reactors have therapeutic potential for temporary management of phenylketonuric patients when their circulating phenylalanine becomes exceedingly high because of infection, fever, or pregnancy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ambrus, C M -- Ambrus, J L -- Horvath, C -- Pedersen, H -- Sharma, S -- Kant, C -- Mirand, E -- Guthrie, R -- Paul, T -- New York, N.Y. -- Science. 1978 Sep 1;201(4358):837-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/567372" target="_blank"〉PubMed〈/a〉
    Keywords: Ammonia-Lyases/*therapeutic use ; Animals ; *Disease Models, Animal ; Dogs ; Enzymes, Immobilized/*therapeutic use ; Extracorporeal Circulation ; Humans ; Phenylalanine/blood ; Phenylalanine Ammonia-Lyase/*therapeutic use ; Phenylketonurias/*therapy
    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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