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  • 1980-1984  (2)
  • Aspect diversity  (1)
  • Neuroendocrine cells  (1)
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  • 1980-1984  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Models of the influence of predation on aspect diversity in prey populations (1982)
    Springer
    Journal of mathematical biology 14 (1982), S. 253-284 
    Details
    ISSN: 1432-1416
    Keywords: Aspect diversity ; Apostasis ; Predator-prey ; Switching
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Notes: Abstract By considering a model incorporating behavioral changes by predators and prey evolution, we demonstrate how under certain conditions apostatic predation influences the maintenance of diversity within prey populations, and among different prey species. Further, we estimate the intrinsic “diversity” wavelength of the system when apostasy combines with other factors to lead to nonuniform distributions of prey along aspect gradients.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00275393
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Pulmonary neuroendocrine cells: Decreased serotonin fluorescence and stable argyrophil-cell numbers in acute hypoxia (1981)
    Springer
    Cell & tissue research 214 (1981), S. 201-205 
    Details
    ISSN: 1432-0878
    Keywords: Neuroendocrine cells ; Hypoxia ; Serotonin ; FIF method ; Lung ; APUD cells
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary We recorded serotonin-emission intensity using formalin induced fluorescence and counted the number of neuroendocrine cells (NEC's) and neuroepithelial bodies (NEB's) containing argyrophil granules. Comparison of serotonin-emission intensity in NEB's of acutely hypoxic neonates (520 mmHg for 2–21/2 h) and normoxic controls showed significantly lower fluorescence in hypoxic animals. Neuroendocrine cell numbers as shown with Grimelius silver-nitrate stain did not change. This suggests either that the Grimelius stain reacts with compounds other than serotonin, or that the decrease in serotonin in acutely hypoxic rabbits is not sufficient to alter argyrophil stainability.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00235157
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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