Fig. 2.

Antioxidant activities of black glutinous rice bran crude extracts (MS, SK, PY, PC and KK; for sample abbreviations see Materials and Methods). Quercetin, l-ascorbic acid and BHT were positive controls for nitric oxide (white column), superoxide (grey column), and lipid peroxidation (black column) assays, respectively. EC₅₀=effective concentration needed to scavenge the free radicals by 50% compared to the control. Different letters in the same test indicate statistically significant difference (p≤0.05) according to Duncan’s multiple ranges test (N=3)