Figure 4: DPPH free radical scavenging activity of a crude extract of Crinum macowanii. DPPH radical scavenging activity of Crinum macowanii and ascorbic acid. The data are the representative of three independent experiments. Values are mean ± SEM. The data were analyzed by two-way ANOVA followed by Bonferroni multiple comparisons test. CM versus AA, ; CM versus AA, .