Figure 1From: Amelioration of azoxymethane induced-carcinogenesis by reducing oxidative stress in rat colon by natural extracts Radical scavenging activity of the extracts as evaluated by the DPPH and ABTS assays. (A) BHT, PapE, PomPE and SE scavenged DPPH free radicals formation in a dose-dependent manner, and reached plateau at a concentration of 30 μg/ml. The dose-dependent effect of PapPE was higher than PomPE and SE. Results are the means ± SD of 6 measurements. (B): Free radicals scavenging ability of vitamin E analog (Trolox), PapPE, PomPE and SE against ABTS radical formation. PapPE, PomPE and SE showed inhibition of ABTS radical formation in a dose-dependent manner. The IC50 of PapPE was comparable for Trolox standard, and significantly higher than PomPE and SE, P < 0.05. Results are the means ± SEM of 6 measurements.Back to article page