Interaction of Ziziphus mucronata subsp. mucronata Methanol Extract and First-Line Antibiotics is Synergistic In Vitro through Production of Reactive Oxygen Species

Table 2

DPPH inhibition (%) by the methanol extract of Z. mucronata.

	% inhibitions of DPPH ± SD at different concentrations of the extracts
Conc.	0.02 mg/mL	0.04 mg/mL	0.06 mg/mL	0.08 mg/mL	0.1 mg/mL	IC50
ZMM	33.9 ± 0.03^e	45.99 ± 0.02^d	73.01 ± 0.02^c	86.07 ± 0.04^b	94.86 ± 0.02^a	0.043 ± 0.02
BHT	38.96 ± 0.02^e	47.2 ± 0.03^d	75.86 ± 0.03^c	91.92 ± 0.05^b	97.78 ± 0.03^a	0.042 ± 0.03
Ascorbic acid	25.23 ± 0.04^e	49.56 ± 0.03^d	72.23 ± 0.02^c	94.77 ± 0.03^b	96.89 ± 0.02^a	0.040 ± 0.02

Average DPPH scavenging activities with different superscripts along the same row are significantly different ().