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Spectral kinetic characteristics of pheophytin a cation radical

, : Spectral kinetic characteristics of pheophytin a cation radical. Biofizika 22(6): 1004-1009

The photochemical generation of pheophytin .alpha. cation-radical in acidulated ethanol and acetonitrile was studied by the method of flash-photolysis. The bands with maxima at 450, 580 and 800 nm correspond to pheophytin a cation-radical in the differential absorption spectra. The efficient rate constants of pheophytin a triplet state deactivation in ethanol, acetonitrile, aceton have the following values: 1.5 .cntdot. 104, 9 .cntdot. 103, 8.7 .cntdot. 103 s-1, correspondingly. The rate constant of electron transfer from pheophytin a to p-benzoquinone in ethanol solutions is 7.8 .cntdot. 109 l/m .cntdot. s. The recombination constants of pheophytin a cation-radical with .ovrhdot.Q- in acetonitrile, and with quinone neutral radical (.ovrhdot.QH) in acidulated ethanol have the following values: 5 .cntdot. 109 and 2 .cntdot. 109 l/m .cntdot. s, correspondingly.

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Klima, Milan, 1966: Contribution on nest ecology, on the circulation and hibernation of the meadow pipit Anthus pratensis in Czechoslovakia. Zool Listy: 86-88

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Dhainaut A., 1967: Study of vitellogenesis in nereis diversicolor annelida polycheta by inst auto radiography with high resolution. Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences Serie D Sciences Naturelles 265(5): 434-436

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Singh, DF.; Patil, SG.; Harshey, DK., 1986: Transportation of fry of fish Cirrhina mrigala under artificially created conditions. Geobios New Reports, 52: 174-175

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