the objective of this study was to test the hypothesis that hepatocarcinogenesis by peroxisome proliferators , a novel class of chemical carcinogens , is mediated either directly by carcinogenic h2o2 , generated by peroxisomal oxidase ( s ) or indirectly by free radicals produced from h2o2 , and that antioxidants could retard or inhibit neoplasia by scavenging active oxygen ( super-oxide radicals o ( 2 ) , hydrogen peroxide , hydroxyl radicals ho , and singlet oxygen 1o2 ) .
C0162772
active oxygen
C0074565
singlet oxygen