earticle

영어

Ethanol crude extracts of wood, bark, leaf, and fruit of Callistenwn citrinus were compared for their antioxidant activities based on DPPH (1, 1-diphenyl-2-picrylhydrazyl) radical-scavenging activity and reducing power. Bark extract showed the most potent radical-scavenging activity and reducing power, showing 94.1 and 0.64% at 25 and ug/mL, respectively. Total phenolic content of the bark extracts (275.0 mg GAE/g) was higher than those of others. Further fractionation of the bark extract using hexane,CH2CI2, and EtOAc showed EtOAc fraction had the highest antioxidant activity (IC50 6.7 ug/mL) and reducing power (0.82 at ug/mL), with total phenolic content of 611.1 mg GAE/g. Total phenolic contents correlated with antioxidant activity (R2 = 0.7061) and reducing power (R2 = 0.7399).