Evidence for a linear variation of the miss and single hit S-state probabilities with the flash number,measured by oxygen evolution in Dunaliella tertiolecta |
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Authors: | Pascal Charles Meunier Radovan Popovic |
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Institution: | (1) Centre de recherche en photobiophysique, Université du Québec à Trois-Rivières, C.P. 500 Trois-Rivières, (Québec), Canada, G9A 5H7 |
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Abstract: | Oxygen evolution in Dunaliella tertiolecta under flashing light was measured with a bare electrode, at a 10 Hz frquency. The sigma coefficients of the oxygen evolution recurrence law (Thibault (1978) J Theor Biol 73, 271) were determined using groups of nine consecutive points. The S-state transition probabilities were computed from the sigma coefficients and plotted as a function of the flash number of the first of the points used. Low standard deviations over the sigma coefficients resulted from the use of our system (Meunier & Popovic (1988) Rev Sci Instr 59, 486). We observed a linear lowering of the miss probability with time, and a linear rise of the single-hit probability with the same absolute value of the slope. The hypothesis that the slopes were zero was statistically tested and was rejected with a 99.9% confidence interval. Our work demonstrates that, to be accurate, an oxygen evolution model has to take the variations in the properties of S-states into account.International Journal of Fracture 76 (1995) R37 |
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Keywords: | O2 evolution S-states model photosynthesis |
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