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

Table 3

In vitro DPPH scavenging activities of methanolic extracts of C. volkensii, V. lasiopus, and A. hockii.

DPPH scavenging activity (% inhibition)
Concentration in mg/ml	Treatments
	L-ascorbic acid	C. volkensii	V. lasiopus	A. hockii
0.0625	46.81 ± 0.46e^A	33.16 ± 0.60e^D	36.44 ± 0.75e^C	39.38 ± 0.30c^B
0.125	62.18 ± 0.18d^A	36.10 ± 0.75d^D	44.73 ± 1.73d^C	53.37 ± 1.30bc^B
0.25	73.06 ± 1.03c^A	51.64 ± 0.46c^C	50.60 ± 0.17c^D	66.67 ± 1.05ab^B
0.5	81.35 ± 0.30b^A	61.31 ± 0.75b^C	70.47 ± 1.79b^B	70.47 ± 1.79b^B
1	87.22 ± 0.75a^A	67.36 ± 0.30a^D	76.86 ± 0.96a^C	82.73 ± 0.62a^B
IC50	0.06	0.25	0.24	0.12

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).