A Pearson correlation analysis revealed that the total phenolic concentration was correlated with oxygen radical absorbance capacity (ORAC r = 0.999, p < 0.05). Therefore, UF demonstrated great efficacy in selectively separating antioxidant peptides. Peptides with MW < 1 kDa possessed superior antioxidant properties ( p < 0.05). RPH was further fractionated using ultrafiltration membrane (UF) and classified by molecular weight (MW MW 10 kDa).
Rice protein was used as a starting material to provide rice protein hydrolysates (RPH) through enzyme-assisted extraction.
