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Triplet chlorophyll generation

The rate constants for reactions of all-trans retinal and retinol with have been measured in various solvents. Rate constants increase with dielectric constant, thereby suggesting that charge transfer is involved. Electronically excited triplet species generated during peroxide-catalysed aerobic oxidation of substrates gives rise to fluorescence from acceptors in micelles. Micelle-solubilized chlorophyll is an excellent detector of enzyme-generated triplet carbonyl species, and micelles make photochemistry without light possible for... [Pg.50]

Aerobic photodestruction of the photosynthetic apparatus seems to be caused mainly by singlet oxygen, which is generated by energy transfer from occasionally formed excited triplet state chlorophyll to ground triplet state oxygen (Siefermann-Harms, 1987),... [Pg.147]

Back-reactions from PS I electron acceptors to P Qo may occur, entailing high-yield formation ofthe triplet state of P,oo (Pohn and Brettel, 1998). In contrast to those formed in the antenna, chlorophyll triplets in the reaction center may pose a serious threat. Under conditions of acceptor side limitation of electron transport, photoaccumulation of and Fx is likely. Once Fj accumulates the back-reaction within rC will occur between A] and P qq, generating triplet P700 with a yield of over 85% (Pohn and Brettel, 1998). [Pg.314]

See other pages where Triplet chlorophyll generation is mentioned: [Pg.1319]    [Pg.307]    [Pg.305]    [Pg.406]    [Pg.385]    [Pg.35]    [Pg.57]    [Pg.58]    [Pg.73]    [Pg.417]    [Pg.10]    [Pg.44]    [Pg.235]    [Pg.189]    [Pg.196]    [Pg.13]    [Pg.108]    [Pg.147]    [Pg.62]    [Pg.177]    [Pg.194]    [Pg.723]    [Pg.12]    [Pg.227]    [Pg.474]    [Pg.60]    [Pg.278]    [Pg.54]    [Pg.314]    [Pg.329]    [Pg.329]    [Pg.332]    [Pg.226]    [Pg.120]    [Pg.57]    [Pg.213]    [Pg.214]    [Pg.255]    [Pg.419]    [Pg.475]    [Pg.333]    [Pg.204]    [Pg.190]    [Pg.183]    [Pg.3]   
See also in sourсe #XX -- [ Pg.58 ]



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Chlorophyll triplet

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