title: Relationship between trace metal concentration and antioxidative activity of ancient rice bran (red and black rice) and a present-day rice bran (Koshihikari).
abstract: Antioxidative activity and polyphenol and trace metal content in bran from ancient rice varieties (red and black rice) and a present-day variety of rice (Koshihikari) were measured. The antioxidative properties of rice bran in terms of scavenging and quenching activity for reactive oxygen species (ROS), including superoxide anion radicals (*O(2)(-)), hydroxyl radicals (*OH), singlet oxygen ((1)O(2)) and lipid peroxide (LOO*), correlated well with polyphenol and trace metal content. In particular, the possibly that Mn content greatly contributes to the antioxidative properties of rice bran was revealed.
authors.affiliation: Office Komenuka-club, Basic Research Department, 4-16-5 Higashishirakawadai, Suma-ku, Kobe 654-0102, Japan. isao-k-kirakira@coffee.ocn.ne.jp
authors.forename: Isao
authors.initials: I
authors.lastname: Kaneda
authors.forename: Fukuzo
authors.initials: F
authors.lastname: Kubo
authors.forename: Hiromu
authors.initials: H
authors.lastname: Sakurai
mesh_terms: D000975:Antioxidants / Q000378:metabolism*; D005419:Flavonoids / Q000737:chemistry; D008670:Metals / Q000737:chemistry*; D012275:Oryza / Q000737:chemistry* / Q000145:classification / Q000378:metabolism*; D010636:Phenols / Q000737:chemistry; D010936:Plant Extracts / Q000737:chemistry; D059808:Polyphenols; D017382:Reactive Oxygen Species / Q000737:chemistry
chemical_list: D000975:Antioxidants; D005419:Flavonoids; D008670:Metals; D010636:Phenols; D010936:Plant Extracts; D059808:Polyphenols; D017382:Reactive Oxygen Species