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  • 1985-1989  (2)
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Material
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Detection of irradiated food (1989)
    [s.l.] : Nature Publishing Group
    Nature 340 (1989), S. 23-24 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR-Thermoluminescence (TL) is one of several phenomena being investigated to develop reliable methods for identifying irradiated foods. Repeated reports1'5 have claimed that herbs and spices them-selves exhibit TL; and this has been proposed as the basis for official testing in West Germany. Our ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/340023b0
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    pH dependent conformational changes and electrostatic effects in plastocyanin (1986)
    Springer
    Photosynthesis research 10 (1986), S. 437-444 
    Details
    ISSN: 1573-5079
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Reduction of plastocyanin (PC) caused a change in the electric field at the surface of the molecule which resulted in a 0.3 pH unit increase in the pKa of a nitrated derivative of Tyr 83. This change in electrical potential could alter the affinity for cytochrome f which is known to bind at this site. Conversely, properties of the copper center, including the pH dependence of the reduction potential, are regulated by the charge on the surface of the molecule. Both the reduction potential and conformation (as measured by near-UV circular dichroic spectra) were pH dependent. Thus the conformation and electrostatic behavior of PC are dependent on oxidiation state, pH and surface charge, raising the possibility that its redox activity is controlled by the pH gradient.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00118310
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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