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  • 1975-1979  (1)
  • 1970-1974  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Flagellar Activity of the Colony Members of Volvox aureus Ehrbg. during Light Stimulation (1971)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 18 (1971), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SYNOPSIS. The flagellar behavior of the colonial Volvox aureus Ehrbg. was examined by placing 1.01 μ polystyrene particles in suspension with Volvox, and recording particle movement photomicrographically. When directional light stimulation was given, flagellar activity ceased in the anterior cells of the stimulated side. Such responses create unequal driving forces on the 2 sides of the colony, so that the colony turns toward the stimulated side. Dose response studies indicated a photoresponse gradient from front to rear in the colony, anterior cells being most responsive. The mechanism of gradient formation has yet to be determined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1971.tb03333.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Short-term reactions of phytochrome in Mougeotia? (1976)
    Springer
    Planta 128 (1976), S. 1-3 
    Details
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Phytochrome controlled chloroplast movement in Mougeotia is induced by flashes of polarized red light. Two subsequent flashes, separated by a dark interval of a few seconds, are much more effective than two simultaneous flashes; a maximal cumulative effect is reached if the duration of the dark interval is 30 ms or longer. We propose two light reactions in series, separated by a very fast dark reaction. Preliminary evidence is given that the energy requirement for these light reactions is different. It is suggested that the two reactions are related in some way to free and bound phytochrome.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00397170
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    Paper (German National Licenses)
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