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  • LIFE SCIENCES (GENERAL)  (2)
  • Stream limnology  (1)
  • inshore  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Observations of seasonal changes in diatoms at inshore localities near Davis Station, East Antarctica (1986)
    Springer
    Hydrobiologia 139 (1986), S. 3-12 
    Details
    ISSN: 1573-5117
    Keywords: antarctic ; habitats ; diatoms ; sea ice ; benthos ; inshore
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Seventy-five diatom taxa were identified from net plankton samples collected inshore during winter, spring and summer 1977–8 near Davis Station, East Antarctica. Species richness was found to be higher in winter than in summer; this is the first time this trend has been reported in antarctic coastal regions. When these taxa were grouped according to the general habitats in which they normally occur, the benthic assemblages dominated the planktonic ones. Of the plankton, most species were of oceanic origin in winter and late summer and are thought to have been swept inshore by a cyclonic gyre which is known to occur in summer but has not been studied in winter.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00770237
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Environmental conditions and phytoplankton in the Mwenda River, a small intermittent river flowing into Lake Kariba (1985)
    Springer
    Hydrobiologia 126 (1985), S. 81-89 
    Details
    ISSN: 1573-5117
    Keywords: Stream limnology ; water chemistry ; tropical river phytoplankton
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Small intermittent rivers play an important role in the limnology of African lakes. The Mwenda River occurs on the southern shore of Lake Kariba. Its flow is governed by the incidence of tropical thunderstorms. During the dry period the river is reduced to a series of turbid pools. Physicochemically the river behaves similarly to a sheltered region of the lake. One river station deviates from the normal pattern because of the insulating effect of a Salvinia mat, and because of its permanent connection with the lake. River flooding flushes both nutrients and major ions into the lake. River phytoplankton populations peak prior to the flushing out of the river. Diatom populations are composed of cosmopolitan tropical taxa.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00008391
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    Paper (German National Licenses)
    Fulltext
  • 3
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    Training-induced alterations in young and senescent rat diaphragm muscle (1992)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: The effect of progressive treadmill exercise on oxidative capacity in three specific diaphragm muscle fiber types and on the capillary density of known fiber types was investigated in young (5 month) and senescent (23 months or older) rats. All animals were trained for 1 hr/day, 5 days weekly, for 10 weeks. Measurements of succinate dehydrogenase activity showed significant increases in all three fiber types in both the young and the senescent trained animals, compared with their sedentary controls. Fiber size and capillary density were not affected by exercise or age. The results demonstrate that the senescent costal diaphragm maintains its ability to adapt to an increased metabolic demand brought about by locomotor exercises.
    Keywords: LIFE SCIENCES (GENERAL)
    Type: Journal of Applied Physiology (ISSN 8750-7587); 72; 4 Ap; 1506-151
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Myosin heavy chain composition in the rat diaphragm - Effect of age and exercise training (1992)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: The effects of aging and exercise training on the myosin heavy chain (MHC) composition were determined in both the costal and crural diaphragm regions of female Fischer 344 rats. Treadmill running at 75 percent maximal oxygen consumption resulted in similar increases in plantaris muscle citrate synthase activity in both young (5 mo) and old (23mo) trained animals (P less than 0.05). It was found that the ratio of fast to slow MHC was significantly higher (P less than 0.005) in the crural compared with costal diaphragm region in both age groups. A significant age-related increase in persentage of slow MHC was observed in both diaphragm regions. The relative proportion of slow MHC in either costal or crural region was not changed by exercise training.
    Keywords: LIFE SCIENCES (GENERAL)
    Type: Journal of Applied Physiology (ISSN 8750-7587); 73; 4; p. 1282-1286.
    Format: text
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    NASA TECHNICAL REPORTS
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