Sample   A. afra     G. perpensa   E. autumnalis   DPPH   ABTS   DPPH   ABTS   DPPH   ABTS     EC50 R2 EC50 R2 EC50 R2 EC50 R2 EC50 R2 EC50 R2 Cr 2.113 0.5043 6.447 0.9697 1.069 0.346 32.49 0.9302 2.891 0.7544 12.18 0.8771 H 29.5 0.4448 96.66 0.8541 46.88 0.5588 646.5 0.4257 21.67 0.5432 929.40 0.6797 DCM 36.03 0.8452 89.08 0.9166 48.71 0.8813 164.9 0.6992 87.71 0.9615 130.00 0.726 ET 199.3 0.6795 68.57 0.9308 57.67 0.7889 11.39 0.8678 95.32 0.8442 24.44 0.9709 Ac 4.393 0.9288 32.95 0.8637 2.795 0.2938 261.5 0.4348 2.461 0.7564 24.44 0.9709 Met 4.715 0.8696 6.028 0.8994 2.795 0.2938 292.9 0.4577 6.621 0.7286 15.17 0.9446

Cr=crude extract, H=hexane fraction, DCM=dichloromethane fraction, ET=ethyl acetate fraction, Ac=acetone fraction, Met=methanol fraction, Positive standards: trolox =0.04 ± 0.001, ascorbic acid=0.04 ± 0.001

Table 4: Free radical scavenging activity of the crude extract and fractions of varied polarities (μg/ml).