Figure 2.

Antioxidant capacities of different solvent extracts of the leaf and stem of Clinacanthus nutans determined by (a) DPPH, (b) ABTS, and (c) FRAP Assays. Determinations for DPPH were expressed in percentage of radical scavenging activity over blank (%/blank), and those of ABTS assay were expressed as equivalent of Trolox, while, for FRAP assay, Gallic acid was used as calibration standard. Data are means of three replicates and are reported as mean ± standard deviation. Bars with different letters in each panel differ significantly (p < 0.05) according to Duncan's multiple range test. Groups are the same as Table 2.