Fig. 2.

DPPH radical scavenging activity (A) and IC₅₀ (B) of orange fruit (OF) and orange peel (OP), when extracted various solvents. E, ethanol; M, methanol; A, acetone. IC₅₀: concentration for scavenging 50% DPPH radical. 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, ^**P<0.01 significantly different between fruit and peel extract by Student t-test.