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Cellular antioxidant activity (A) and IC50 (B) of different solvent extracts from orange fruit (OF) and orange peel (OP). E, ethanol; M, methanol; A, acetone. IC50: concentration for scavenging 50% of AAPH radicals. Values are mean with standard deviation. Values not sharing the same letter within OF or OP are significantly different from one another (P<0.05) by Duncan’s multiple range test. *P<0.05 significantly different between fruit and peel extract by Student t-test.
