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  • Articles  (33)
  • Animals  (15)
  • Ultrastructure  (10)
  • Chemical Engineering  (4)
  • Engineering General  (4)
  • 1975-1979  (33)
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  • Articles  (33)
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  • 1
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    The stomach signals satiety (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-07-14
    Description: Inflatable pyloric cuffs and stomach tubes were implanted in rats. With the cuff inflated and a valve to limit intragastric pressure to that accompanying normal satiety, they drank only as much when they had been deprived of food for 12 hours as without inflation of the cuff. However, they overdrank with the cuff inflated when they had been water deprived for 12 hours. When 10 ml of milk was withdrawn from the stomach with the cuff inflated, compensatory drinking occurred. Further, compensatory drinking also occurred when milk escaped from the stomach into the duodenum. Satiety signals thus arise from the stomach.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Deutsch, J A -- Young, W G -- Kalogeris, T J -- New York, N.Y. -- Science. 1978 Jul 14;201(4351):165-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/663647" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Drinking Behavior/physiology ; Duodenum/physiology ; Food Deprivation ; Male ; Rats ; Satiation/*physiology ; Satiety Response/*physiology ; Stomach/*physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Prenatal exposure to prednisone in humans and animals retards intrauterine growth (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-10-27
    Description: Prednisone treatment for infertility and subsequent pregnancy maintenance in humans resulted in a significant decrease in the birth weight of full-term infants and a marked increase in the percentage of newborn infants weighing 2500 grams or less, that is, "light for dates" in comparison to control offspring. A parallel experiment with mice indicated that the reduction of birth weight was caused by exposure to corticosteroids rather than to maternal disease or malfunction.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Reinisch, J M -- Simon, N G -- Karow, W G -- Gandelman, R -- New York, N.Y. -- Science. 1978 Oct 27;202(4366):436-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/705336" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Birth Weight/*drug effects ; Female ; Fetus/*drug effects ; Humans ; *Infant, Low Birth Weight ; Infant, Newborn ; Male ; Mice ; Prednisone/*adverse effects ; Pregnancy/*drug effects
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Chicken gizzard: relation between calcium-activated phosphorylation and contraction (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-05-04
    Description: Of the proteins in mechanically disrupted chicken gizzard fibers (no functional sarcolemma) only the 20,000-dalton light chains of myosin underwent large Ca2+-and Sr2+-dependent changes in phosphorylation. Phosphorylation closely corresponded with the Ca2+- and Sr2+-activated tensions. Adenosine 5'-O (3'-thiotriphosphate) only in the presence of Ca2+ induced irreversible Ca2+-insensitive activation of tension and thiophosphorylation of the 20,000-dalton light chains, and blocked incorporation of 32P from [gamma-32P]adenosine triphosphate into the myosin light chains.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hoar, P E -- Kerrick, W G -- Cassidy, P S -- New York, N.Y. -- Science. 1979 May 4;204(4392):503-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/432654" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Calcium/*pharmacology ; Chickens ; Gizzard/*physiology ; In Vitro Techniques ; Molecular Weight ; Muscle Contraction/*drug effects ; Muscle, Smooth/*physiology ; Myosins/*metabolism ; Phosphorylation ; Protein Kinases/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
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    Mercury concentrations in Pacific hake, Merluccius productus (Ayres), as a function of length and latitude (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    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
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 5
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    Cardiopulmonary changes in kittens during sleep (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-09-07
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Guntheroth, W G -- New York, N.Y. -- Science. 1979 Sep 7;205(4410):1040-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/472729" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chick Embryo ; Hemodynamics ; Respiration ; Sleep/*physiology ; Sudden Infant Death/physiopathology
    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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  • 6
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    Membrane surface potential changes may alter drug interactions: an example, acetylcholine and curare (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-03-30
    Description: Curare is known to be less effective as an acetycholine antagonist when the divalent cation concentration of the extracellular solution is increased. This observation can be accounted for by the negative surface potential on the end plate; an increase in divalent cation concentration decreases the negativity of the surface potential and thereby lowers the concentrations of cations at the membrane-solution interface. The concentration of divalent cations, such as curare, will be reduced more than the concentration of univalent cations, such as acetylcholine. The observations can be accounted for by a surface potential of about -50 millivolts. The same principle can explain the reported actions of divalent cations on the affinity of receptors for acetylcholine. The effects of surface potential on concentrations at active sites may play an important role in drug interactions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Van der Kloot, W G -- Cohen, I -- New York, N.Y. -- Science. 1979 Mar 30;203(4387):1351-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/424757" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylcholine/*pharmacology ; Animals ; Anura ; Curare/*pharmacology ; Drug Interactions ; Electric Conductivity ; Ions ; *Membrane Potentials ; Models, Biological ; Motor Endplate/*physiology ; Neuromuscular Junction/*physiology ; Receptors, Cholinergic/*drug effects
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 7
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    Feeding and behavioral activation in infant rats (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-07-13
    Description: Three-day-old rats that were separated from their mothers and deprived of food were found to be capable of feeding either from small puddles of milk or when milk was infused into the front of their mouths. Such feeding was accompanied by a dramatic increase in behavioral activity and only occurred in a warm environment. These data demonstrate that neural systems for ingestive behavior are present at birth and suggest the existence of feeding-related arousal or motivational systems.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hall, W G -- New York, N.Y. -- Science. 1979 Jul 13;205(4402):206-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/451591" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Newborn/*physiology ; Behavior, Animal/*physiology ; Feeding Behavior/*physiology ; Food Deprivation ; Movement ; Rats ; Temperature ; Time Factors
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 8
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    Appetitive learning in 1-day-old rat pups (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-07-27
    Description: One-day-old rat pups learned to probe upward into a terry-cloth-covered paddle when they were rewarded with small infusions of milk into their mouths. In the presence of two paddles, discriminable on the basis of odor and position in the test container, the pups learned to probe into the paddle that provided them with milk. These experiments demonstrate (i) that milk may serve as a reinforcer to deprived rat pups and (ii) that pups as young as 1 day are capable of appetitive learning.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Johanson, I B -- Hall, W G -- New York, N.Y. -- Science. 1979 Jul 27;205(4404):419-21.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/451612" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Animals, Newborn ; *Feeding Behavior ; Food Deprivation ; *Learning ; Rats
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 9
    Electronic Resource
    Electronic Resource
    Gap junctions in hemodichorial and hemotrichorial placentae (1976)
    Springer
    Cell & tissue research 171 (1976), S. 305-315 
    Details
    ISSN: 1432-0878
    Keywords: Chorioallantoic placenta ; Gap junctions ; Diaplacental transport ; Ultrastructure ; Freeze-fracturing
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Gap junctions were found to be a constant feature of chorioallantoic placentae with two or three trophoblastic layers. The gap junctions connect layers I and II in hemodichorial and layers II and III in hemotrichorial placentae. Although the gap junctions vary in form and in the packing density of membrane-associated particles, they cover an extensive surface area in all species examined. The gap junctions always connect adjacent membranes of two trophoblastic layers, which show no evidence of micropinocytotic activity; at least one of these trophoblastic layers is syncytial. It is therefore concluded that the gap junctions play an important role in diaplacental transport. We consider that gap junctions act as molecular sieves, resulting in limitations in the transport of large molecules. The passage of small molecules, on the contrary, would be facilitated by the gap junctions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00224656
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  • 10
    Electronic Resource
    Electronic Resource
    Morphological alterations and functional changes of interhepatocellular junctions induced by bile duct ligation (1977)
    Springer
    Cell & tissue research 182 (1977), S. 299-310 
    Details
    ISSN: 1432-0878
    Keywords: Liver ; Bile duct ligation (rat) ; Cell membrane ; Intercellular junctions ; Ultrastructure ; Freeze-fracturing
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The effect of bile duct ligation on the intercellular junctions of hepatocytes was investigated. The features and the arrangement of the bile canaliculi and the zonulae occludentes alter concomitant to the increase of the intracanalicular pressure. The lumen of the bile canaliculi enlarges and the microvilli disappear. The array of the zonulae occludentes becomes irregularly shaped, the number of strands diminishes and interruptions of the strands occur. With peroxidase a leakage in the bile-blood barrier is detected. Furthermore a disappearance of gap junctions between the hepatocytes after bile duct ligation is observed. The present investigation shows that the zonulae occludentes are mobile structures which are changed by increased unilateral pressure. Due to their ultrastructural alterations, a leakage of the permeability barrier between physiological compartments is found. We acknowledge the helpful criticism and discussion of Prof. H.D. Fahimi. We are indebted to Mrs. B. Brühl, M. Bürkle and Ch. Walenta for technical assistance, and to stud. med. Jon Greenberg for preparing the manuscript
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00219766
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