"CH2OH + H 2 0 (H 2) (19) (20) 24 B. H. J. Bielski, D. E. Cabelli, R. L. Arudi, and A. B. Ross, J. Phys. Chem. Ref. Data 14, 1041 (1985). 25 A. O. Allen and B. H. J. Bielski, in "Superoxide Dismutase" (L. W. ), Vol. 1, p. 125. CRC Press, Boca Raton, Florida, 1982. 26 B. H. J. Bielski and D. E. Cabelli, Int. J. Radiat. Biol. 59, 291 (1991). 27 p. Neta, R. E. Huie, and A. B. Ross, J. Phys. Chem. Ref. Data 17, 1027 (1988). -D. Asrnus, A. Henglein, M. Ebert, and J. P. Keene, Ber. Bunsen-Ges.
2t'22 Thus their possible formation in "apo" zinc fingers and other sites through the action of "decompartmentalized iron," and the involvement in subsequent reactions of DNA or other biologically active compounds, particularly conjugated olefins such as the leukotrienes or the retinoids, may be of considerable significance) 9,23 i T. Ohnishi, H. Yamazaki, T. Iyanagi, T. Nakamura, and I. Yamazaki, Biochim. Biophys. Acta 172, 357 (1969). z H. Wefers and H. Sies, Eur. J. Biochem. 137, 29 (1983). 3 L.
The slope represents ks/ksc N from which ks is calculated. OH radical in aqueous solutions have been obtained using both techniques (for a compilation, see Ref. 23). For the determination of the rate constants for the H atom (also compiled in Ref. 2 × 1010 d m 3 m o 1 - 1 sec-l]. 9 x 10 7 dm 3 mo1-1 sec-1]. OH + t-BuOH) = 5 x 108 dm 3 mo1-1 sec -~] but much more slowly with the H atom [k(H- + t-BuOH) = 8 x 104 dm 3 mo1-1 sec-1], giving rise to a radical that shows very little absorption in the accessible wavelength region and is also relatively unreactive.