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  • 1975-1979  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Iodobenzene diacetate (1977)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 33 (1977), S. 1620-1622 
    Details
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0567740877006694
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Cellular composition and physiological characteristics of the diatom Thalassiosira weissflogii adapted to cadmium stress (1979)
    Springer
    Marine biology 55 (1979), S. 171-180 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Prolonged exposure of Thalassiosira weissflogii (Grunow) to a sub-lethal concentration of cadmium in continuous culture resulted in the development of cellular characteristics allowing optimal growth in the presence of Cd. Examination of Cd-adapted and unadapted cells was made on steady-state populations growing at the same rate in order to eliminate any effects of differing growth rate on metabolism. Adaptation to Cd stress was manifested as increases in mean cell volume, dry weight, protein: DNA, protein: RNA, protein: carbohydrate, protein nitrogen: total cell nitrogen and carotenoid: chlorophyll a ratios. Subsequent exposure of the cells to Cd over a wide concentration range showed that cellular division rate, carbon photoassimilation and extracellular release of dissolved organic compounds were greatest near the Cd concentration to which the cells had previously been adapted. Enhanced cellular carbon photoassimilation in Cd-adapted cells correlated exactly with increased cellular protein content. The amount of dissolved organic excretion by Cd-adapted cells at the adaptation concentration was the same as that of unadapted cells at the same concentration. Since total carbon photoassimilation was greater in Cd-adapted cells at this concentration, the percentage of carbon excreted was less in these cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00396815
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Some preliminary observations on the enhancement of phytoplankton growth by low levels of mineral hydrocarbons (1976)
    Springer
    Hydrobiologia 51 (1976), S. 85-89 
    Details
    ISSN: 1573-5117
    Keywords: Hydrocarbons ; Nanoplankton ; µ-Flagellates ; Photosynthesis ; Haptophyceae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract From field and laboratory experiments it has been observed that low concentrations (ppb) of mineral hydrocarbons can cause an increase in photosynthesis among the nanoplankton. In field experiments, the increase in photosynthetic activity among the nanoplankton led to a bloom of µ-flagellates predominated by a member of the Haptophyceae,Chrysochromulina kappa.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00007989
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    Paper (German National Licenses)
    Fulltext
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