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  • 1
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    Changes in the cell membranes of the bullfrog gastric mucosa with Acid secretion (1982)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1982-07-30
    Description: The effective area, resistance, and configuration of the apical and basolateral cell membranes of the bullfrog gastric mucosa were studied as a function of acid secretion rate, by alternating-current impedance methods. The drop in transepithelial resistance with acid secretion is attributed to the great increase in apical membrane area (hence conductance) associated with tubulovesicles. There is no evidence of a change in basolateral membrane resistance or of apical membrane premeability per unit area.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Clausen, C -- Machen, T E -- Diamond, J M -- New York, N.Y. -- Science. 1982 Jul 30;217(4558):448-50.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17782981" target="_blank"〉PubMed〈/a〉
    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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    Rediscovery of the yellow-fronted gardener bowerbird (1982)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1982-04-23
    Description: The long-lost bowerbird Amblyornis flavifrons was found in the Foja Mountains of west New Guinea, and its bower and display were discovered. The bower is a stick tower on a rimmed moss platform, adorned with separate piles of fruit of three different colors. The displaying male extends toward the female a blue fruit set against his golden crest. These observations support a derivation of bower ornamentation from ritual courtship feeding and a transfer of ornamentation from the male's plumage to the bower.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Diamond, J M -- New York, N.Y. -- Science. 1982 Apr 23;216(4544):431-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17745869" target="_blank"〉PubMed〈/a〉
    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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    Turnover, membrane insertion, and degradation of sodium channels in rabbit urinary bladder (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-09-23
    Description: Noise analysis of rabbit bladder revealed two components: Lorentzian noise, arising from interaction of amiloride with the Na+ channel, and flicker noise (l/f, where f is frequency), as in other biological membranes. Hydrostatic pressure, which causes exchange between intracellular vesicular membrane and apical membrane, increases the number but not the single-channel current of the amiloride-sensitive channels. Flicker noise arises from degraded channels that have lost amiloride sensitivity and Na+ to K+ selectivity. The degraded channels were selectively removed by washing the mucosal surface. These results imply channel turnover by intracellular synthesis, transfer from vesicular to apical membrane, degradation, and elimination.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Loo, D D -- Lewis, S A -- Ifshin, M S -- Diamond, J M -- AM17327/AM/NIADDK NIH HHS/ -- AM20851/AM/NIADDK NIH HHS/ -- GM14772/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1983 Sep 23;221(4617):1288-90.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6612343" target="_blank"〉PubMed〈/a〉
    Keywords: Amiloride/pharmacology ; Animals ; Cell Membrane/metabolism ; Cytoplasmic Granules/metabolism ; Epithelium/physiology ; Rabbits ; Sodium/*metabolism ; Urinary Bladder/*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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  • 4
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    Extinctions and introductions in the new zealand avifauna: cause and effect? (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-01-30
    Description: New Zealand, like many other islands, has suffered extinctions of native species and successful introductions of exotic species. It has been uncertain whether the introductions caused the extinctions or whether the extinctions permitted the introductions. On New Zealand's Hauraki Gulf islands, which are unusual in their near lack of introduced mammalian predators and complete lack of mammalian browsers, exotic bird species abundant in mainland New Zealand forest and reaching these islands are virtually absent from unmodified forest. Exotic bird species disappeared from Cuvier Island's forest after elimination of mammalian predators and browsers. Hence extinctions of native species were not due to competition from introduced species but to other factors (such as mammalian predators and habitat alteration). Only after decimation of native species and forest alteration by browsing mammals could exotic birds invade forest.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Diamond, J M -- Veitch, C R -- New York, N.Y. -- Science. 1981 Jan 30;211(4481):499-501.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17816611" target="_blank"〉PubMed〈/a〉
    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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    Digestive adaptations for fueling the cost of endothermy (1985)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1985-04-12
    Description: Little is known about the digestive adaptations that enable mammals to sustain metabolic rates an order of magnitude higher than those of reptiles. Comparison of several features of digestion in mammals and lizards of similar size eating the same diet revealed that mammals processed food ten times faster and with the same or greater extraction efficiency. Transport kinetics and rates of nutrient absorption normalized to the quantity of intestinal tissue were similar in these two classes of vertebrates. The main basis for faster absorption in mammals is their much greater intestinal surface area.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Karasov, W H -- Diamond, J M -- AM17328/AM/NIADDK NIH HHS/ -- GM14772/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1985 Apr 12;228(4696):202-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3975638" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Transport ; *Body Temperature ; Diet ; *Digestion ; Eating ; Glucose/metabolism ; Intestines/anatomy & histology/physiology ; Lizards/physiology ; Mice ; Proline/metabolism ; Rats
    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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  • 6
    Electronic Resource
    Electronic Resource
    Studies of sodium channels in rabbit urinary bladder by noise analysis (1984)
    Springer
    The journal of membrane biology 80 (1984), S. 135-151 
    Details
    ISSN: 1432-1424
    Keywords: Na+ channels ; channel turnover ; fluctuation analysis ; tight epithelium ; mammalian urinary bladder
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Summary Sodium channels in rabbit urinary bladder were studied by noise analysis. There are two components of short-circuit current (I sc) and correspondingly two components of apical Na+ entry, one amiloride-sensitive (termedI A and the A channel, respectively) and one amiloride-insensitive (I L and the leak pathway, respectively). The leak pathway gives rise tol/f noise, while the A channel in the presence of amiloride gives rise to Lorentzian noise. A two-state model of the A channel accounts well for how the corner frequency and plateau value of Lorentzian noise vary with amiloride concentration. The single-channel current is 0.64 pA, and the conducting channel density is on the order of 40 copies per cell. Triamterene blocks the A channel alone, and increasing external Na+ decreases the number but not the single-channel permeability of the A channel. Hydrostatic pressure pulses (“punching”) increase the number of both pathways. Repeated washing of the mucosal surface removes most of the leak pathway without affecting the A channel. Properties of the A channel revealed by noise analysis of various tight epithelia are compared, and the mechanism ofl/f noise is discussed. It is suggested that the A channel is synthesized intracellularly, stored in intracellular vesicles, transferred with or from vesicular membrane into apical membrane under the action of microfilaments, and degraded into the leak pathway, which is washed out into urine or destroyed. The A channel starts withP Na/P K∼30 and loses selectivity in stages untilP Na/P K reaches the free-solution mobility ratio (∼0.7) for the leak pathway. This turnover cycle functions as a mechanism of repair and regulation for Na+ channels, analogous to the repair and regulation of most intracellular proteins by turnover. Vesicular delivery of membrane channels may be operating in several other epithelia.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01868770
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  • 7
    Electronic Resource
    Electronic Resource
    Biological Membranes: the Physical Basis of ION and Nonelectrolyte Selectivity (1969)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Physiology 31 (1969), S. 581-646 
    Details
    ISSN: 0066-4278
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Medicine , Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.ph.31.030169.003053
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  • 8
    Electronic Resource
    Electronic Resource
    Specific Regulation of Intestinal Nutrient Transporters by their Dietary Substrates (1989)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Physiology 51 (1989), S. 125-141 
    Details
    ISSN: 0066-4278
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Medicine , Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.ph.51.030189.001013
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  • 9
    Electronic Resource
    Electronic Resource
    Ontogenetic Development of Intestinal Nutrient Transporters (1989)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Physiology 51 (1989), S. 601-617 
    Details
    ISSN: 0066-4278
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Medicine , Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.ph.51.030189.003125
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  • 10
    Electronic Resource
    Electronic Resource
    Comments on Wilson's Null Model (1987)
    Springer
    Oecologia 74 (1987), S. 159-160 
    Details
    ISSN: 1432-1939
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00377363
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