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'Carotenoids' in keywords Facet   Publication Year 2000  [X]
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2000[X]
1Author    Andre Buche, Rafael PicorelRequires cookie*
 Title    Ectothiorhodospira sp  
 Abstract    Alkaline treatm ent of the Ectothiorhodospira sp. light harvesting system II induces mono-merisation of the bacteriochlorophylls and a bleaching of the carotenoid absorption bands in the visible region. Concomitantly, the maximum of absorption observed around 373 nm shifts towards 354 nm. This shift does not result from the Soret band but from a change of the absorption properties of the carotenoids. Furtherm ore, these pigments are not modified chemically but the spectral conversion results from environmental changes. It is assumed that the dissociation of the bacteriochlorophylls in alkaline medium is accompanied by a struc­ tural reorganisation of the complex which reinforces the interactions between the polypep­ tides and the carotenoids. 
  Reference    Z. Naturforsch. 55c, 576 (2000); : 3 4 -9 7 6 -5 7 5 6 2 0. received February 25/April 4 2000 
  Published    2000 
  Keywords    Carotenoid, Soret, Shift, Spirilloxanthin 
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 TEI-XML for    default:Reihe_C/55/ZNC-2000-55c-0576.pdf 
 Identifier    ZNC-2000-55c-0576 
 Volume    55