Table 1.

DPPH radical scavenging activity of the alcoholic and aqueous extracts of Z. mucronata subsp. mucronata

	% inhibitions of ABTS+ ± SD at different concentrations of the extracts
Extracts	0.02 (mg/ml)	0.04 (mg/ml)	0.06 (mg/ml)	0.08 (mg/ml)	0.1 (mg/ml)	IC50 (mg/ml)
Aqueous	9.87 ± 0.02a	21.86 ± 0.02b	46.26 ± 0.02c	62.18 ± 0.02d	70.34 ± 0.02e	0.0646 ± 0.02
Acetone	32.67 ± 0.02a	39.35 ± 0.03b	64.49 ± 0.02c	82.53 ± 0.03d	88.15 ± 0.02e	0.0482 ± 0.02
Ethanol	34.35 ± 0.02a	47.55 ± 0.03b	71.04 ± 0.02c	85.06 ± 0.01d	94.47 ± 0.02e	0.0422 ± 0.03
BHT	37.36 ± 0.02a	48.50 ± 0.03b	74.52 ± 0.01c	92.56 ± 0.03d	98.47 ± 0.02e	0.0406 ± 0.02
Vitamin C	23.88 ± 0.01a	47.65 ± 0.02b	73.89 ± 0.03c	90.94 ± 0.01d	93.01 ± 0.03e	0.0411 ± 0.02

Data are presented as means ± standard deviation of three replicate with significant increases from all samples tested.

Superscript a, b, c, d and e showed that means ± standard deviation in the same row with different superscript are significantly different (p < 0.05)