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- W2004070515 abstract "Abstract From Emerson enhancement measurements of O2 evolution in Chlorella pyrenoidosa, it was possible to establish a relationship between the concentration of photosystem II open reaction centers (E) and the distribution of photons between photosystems I and II [ (1 − α) α ] during steady state. The superposition of lights of two different wavelengths (1 and 2) gives concentrations of E and α intermediate between those obtained with light 1 and 2 separately. This relationship extends a previous one based on quantum yield measurements. It has been expressed here by a curve corresponding to a fixed value of the intersystem apparent equilibrium constant (K). Up to 700 nm, K remains equal to 6. Above this wavelength, although the margin of error is rather great, K apparently increases to 12 or more. The possibility of “spill-over” of light absorbed by System II to System I was studied. There is no probability that this spill-over, if any, exceeds 25% in Chlorella. The apparent equilibrium constant is decreased by 3(3,4-dichlorophenyl)-1,1-dimethylurea. This is not in favor of the hypothesis of fully independent electron-transfer chains in photosynthesis; it is therefore likely that some communication between those chains exists." @default.
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- W2004070515 date "1971-03-01" @default.
- W2004070515 modified "2023-09-27" @default.
- W2004070515 title "Relationships between the photon distribution between the two photosystems, the concentration of system II reaction centers and the intersystem equilibrium constant in Chlorella pyrenoidosa" @default.
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- W2004070515 doi "https://doi.org/10.1016/0005-2728(71)90108-3" @default.
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