title: Proton-donative antioxidant activity of fucoxanthin with 1,1-diphenyl-2-picrylhydrazyl (DPPH).
abstract: Reactions between a carotenoid, fucoxanthin and 1,1-diphenyl-2-picrylhydrazyl were investigated both under anoxic and aerobic conditions. Fucoxanthin equimolarly reacted with 1,1-diphenyl-2-picrylhydrazyl under anoxic conditions. Under aerobic conditions, only a part of fucoxanthin consumed 1,1-diphenyl-2-picrylhydrazyl and the degree of reaction fluctuated with repeated trials. beta-Carotene or other carotenoids, beta-cryptoxanthin, zeaxanthin, licopen and lutein, were also examined in the reaction with 1,1-diphenyl-2-picrylhydrazyl under anoxic conditions. All these compounds scarcely reacted with 1,1-diphenyl-2-picrylhydrazyl.
authors.affiliation: Department of Radiopharmacy, Faculty of Pharmaceutical Sciences, Science University of Tokyo, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Nomura
authors.forename: M
authors.initials: M
authors.lastname: Kikuchi
authors.forename: A
authors.initials: A
authors.lastname: Kubodera
authors.forename: Y
authors.initials: Y
authors.lastname: Kawakami
mesh_terms: D000975:Antioxidants / Q000737:chemistry / Q000378:metabolism*; D015764:Bepridil / Q000031:analogs & derivatives* / Q000737:chemistry / Q000378:metabolism; D001713:Biphenyl Compounds; D002338:Carotenoids / Q000031:analogs & derivatives* / Q000737:chemistry / Q000378:metabolism; D065366:Cryptoxanthins; D000077276:Lycopene; D010851:Picrates; D011522:Protons; D013329:Structure-Activity Relationship; D014810:Vitamin E / Q000737:chemistry / Q000378:metabolism; D024341:Xanthophylls; D065146:Zeaxanthins; D019207:beta Carotene / Q000031:analogs & derivatives / Q000737:chemistry / Q000378:metabolism
chemical_list: D000975:Antioxidants; D001713:Biphenyl Compounds; D065366:Cryptoxanthins; D010851:Picrates; D011522:Protons; D024341:Xanthophylls; D065146:Zeaxanthins; D019207:beta Carotene; C025164:fucoxanthin; D014810:Vitamin E; D002338:Carotenoids; D015764:Bepridil; C004931:1,1-diphenyl-2-picrylhydrazyl; D000077276:Lycopene