Table 2.

In vitro ferric reducing antioxidant power activities of methanolic extracts of C. volkensii, V. lasiopus, and A. hockii.

Absorbance at 700 nm
Concentration in (mg/ml)	L-ascorbic acid	A. hockii	V. lasiopus	C. volkensii
0.2	1.72 ± 0.01eA	1.63 ± 0.02dB	1.35 ± 0.01eC	1.05 ± 0.02eD
0.4	1.92 ± 0.00dA	1.82 ± 0.00cB	1.47 ± 0.01dC	1.23 ± 0.01dD
0.6	2.25 ± 0.01cA	1.88 ± 0.01cB	1.72 ± 0.01cC	1.42 ± 0.02cD
0.8	2.56 ± 0.02bA	2.18 ± 0.02bB	1.87 ± 0.02bC	1.65 ± 0.01bD
1	2.75 ± 0.00aA	2.54 ± 0.04aB	1.93 ± 0.02aC	1.81 ± 0.01aD
EC 50 (mg/ml)	0.14	0.16	0.17	0.21

The values are expressed as mean ± SEM. Values with the same uppercase superscript letter within the same row and those with the same lowercase subscript letter within the same column are not significantly different (P > 0.05, one-way ANOVA followed by Tukey's test).