Abstract
Publisher Summary This chapter describes thiyl (sulfhydryl/thiol) free radical reactions, vitamins,/3-carotene, and superoxide dismutase in oxidative stress. Thiyl (sulfhydryl/thiol) free radicals are receiving increasing consideration as intermediates in processes that may be involved in the development of biological damages resulting from oxidative or reductive stress. These include cytotoxicity mutagenesis) DNA damage, lipid peroxidation, radiation effects, reactions with biologically active compounds containing conjugated olefinic groupings such as vitamin A and D. In this chapter the acquisition, use, and limitations of such data are discussed and illustrated with reference to the xanthine oxidase-initiated thiyl free radical-mediated destruction of β -carotene and the observed protective effects of superoxide dismutase (SOD), vitamin C, and vitamin E.
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