Pulse radiolysis study of the reactivity of Trolox C phenoxyl radical with superoxide anion.
The reaction between the phenoxyl radical of Trolox C, a water-soluble vitamin E analogue, and superoxide anion radical was examined by using the pulse radiolysis technique. The results indicate that the Trolox C phenoxyl radical may undergo a rapid one-electron transfer from superoxide radical [k = (4.5 +/- 0.5) x 10(8) M-1.S-1] to its reduced form. This finding indicates that superoxide radical might play a role in the repair of vitamin e phenoxyl radical.
Cadenas
E
E
Department of Pathology II, University of Linköping, Sweden.
Merényi
G
G
Lind
J
J
D000975:Antioxidants; D001578:Benzopyrans; D002839:Chromans; D005609:Free Radicals; D066298:In Vitro Techniques; D007700:Kinetics; D010084:Oxidation-Reduction; D011675:Pulse Radiolysis; D013057:Spectrum Analysis; D013481:Superoxides; D014810:Vitamin E / Q000031:analogs & derivatives
D000975:Antioxidants; D001578:Benzopyrans; D002839:Chromans; D005609:Free Radicals; D013481:Superoxides; D014810:Vitamin E; C010643:6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid