In Vitro Antioxidant Activities of Methanolic Extracts of Caesalpinia volkensii Harms., Vernonia lasiopus O. Hoffm., and Acacia hockii De Wild

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 ± 0.01e^A	1.63 ± 0.02d^B	1.35 ± 0.01e^C	1.05 ± 0.02e^D
0.4	1.92 ± 0.00d^A	1.82 ± 0.00c^B	1.47 ± 0.01d^C	1.23 ± 0.01d^D
0.6	2.25 ± 0.01c^A	1.88 ± 0.01c^B	1.72 ± 0.01c^C	1.42 ± 0.02c^D
0.8	2.56 ± 0.02b^A	2.18 ± 0.02b^B	1.87 ± 0.02b^C	1.65 ± 0.01b^D
1	2.75 ± 0.00a^A	2.54 ± 0.04a^B	1.93 ± 0.02a^C	1.81 ± 0.01a^D
EC50(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 (, one-way ANOVA followed by Tukey’s test).