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Antioxidant activity of C. xanthorrhiza Roxb. essential oil measured by DPPH and FRAP assays. n = 3, statistical analysis by one-way ANOVA followed by Tukey’s post hoc test, * p < 0.05, ** p < 0.01, *** p < 0.001. S0, no shade; S25, 25% shade; S50, 50% shade; S75, 75% shade. DPPH, 2,2′-diphenyl-1-picrylhydrazyl; DW, dry weight; FRAP, ferric reducing antioxidant power; TE, Trolox equivalent; DW: dry weight.
