Fig. 4

DPPH free radical scavenging assay of D. quercifolia and the standard representing IC50 values (a) and antioxidant activity index (b). Here, ME: crude methanol extract; PE- petroleum ether soluble fraction; CTC- carbon tetrachloride soluble fraction; CF- chloroform soluble fraction; AQ-aqueous fraction; ASC-ascorbic acid (standard)