Fig. 1.

Assay of total antioxidant capacity assay (TAC) of ethanolic extract of R. officinalis L. (eeRo) (A) and its fractions: DCM (from dichloromethane) (B), EA (from ethyl acetate) (C), But OH (from buthanol) (D). Ascorbic acid (E). The ascorbic acid was used as control at 30 μg/ml. Data are reported as means ± SEM of three to six determinations. One-way ANOVA, followed by Newman–Keuls test posttest, respectively. *p < 0.05, significant difference when compared to control. ^a,b,c,dp < 0.05 significant difference among groups with different letters.