Antioxidative Properties of the Pigment from Colored Rice (Akamajiri-kuromai)

Abstract

Yuka Isobe Megumi Morioka Norihiko Terahara Takashi Komiya Miyo Narita The antioxidative activity of the crude pigment extracted from akamajiri-kuromai colored rice was measured by its suppressive activity toward the oxidation of linoleic acid, DPPH radical-scavenging activity, and OH radicalscavenging activity. The pigment extracted from akamajiri-kuromai exhibited higher antioxidative activity than the pigment extracted from red rice and black rice. The pigment of akamajiri-kuromai contained two components: the one fractionated from butanol was identified as Cy 3-Glc by HPLC and ¹H-NMR analyses, and the one fractionated from ethyl acetate seemed to be tannin.