title: Antimutagenic, antioxidant and free radical scavenging activity of ethyl acetate extracts from white, yellow and red onions.
abstract: The beneficial effects of red, yellow and white onion extracts have been assessed by antioxidant activity and antimutagenic activity. And the effects compared to BHT and ascorbic acid. Total phenolic compounds and flavonoids in onion extracts were determined. Yellow onion extract had more organic acid and free sugar than those detected in the white and red onion extract. The scavenging activity of DPPH radical and H(2)O(2) were increased depending on the concentration. The antioxidant activities using beta-carotene-linoleate system and reducing power were increased but the effect was small to that of BHT and ascorbic acid. After digested, extracts showed antimutagenic activities, and it seems that they inhibit the mutagenicity for digesting. This study demonstrated that the antimutagenicities and antioxidant properties of ethyl acetate extract against mutagens were related to their phenols and flavonoids, which are heat stable and losses digestive juices are relatively low.
authors.affiliation: Department of Food and Nutrition, Institute of Agriculture and Life Science, Gyeongsang National University, 900 Gaza-dong chinju city, South Korea.
authors.forename: Mi-Yae
authors.initials: MY
authors.lastname: Shon
authors.forename: Sang-Do
authors.initials: SD
authors.lastname: Choi
authors.forename: Goon-Gjung
authors.initials: GG
authors.lastname: Kahng
authors.forename: Sang-Hae
authors.initials: SH
authors.lastname: Nam
authors.forename: Nak-Ju
authors.initials: NJ
authors.lastname: Sung
mesh_terms: D000085:Acetates; D016587:Antimutagenic Agents / Q000032:analysis / Q000494:pharmacology; D000975:Antioxidants / Q000032:analysis*; D004305:Dose-Response Relationship, Drug; D016166:Free Radical Scavengers / Q000032:analysis*; D005750:Gastric Juice / Q000187:drug effects / Q000378:metabolism; D007419:Intestinal Secretions / Q000187:drug effects / Q000378:metabolism; D019697:Onions / Q000737:chemistry*; D010936:Plant Extracts / Q000737:chemistry* / Q000378:metabolism / Q000494:pharmacology; D012486:Salmonella typhimurium / Q000187:drug effects / Q000235:genetics
chemical_list: D000085:Acetates; D016587:Antimutagenic Agents; D000975:Antioxidants; D016166:Free Radical Scavengers; D010936:Plant Extracts; C007650:ethyl acetate