title: In vitro antioxidant capacities and fatty acid compositions of three Centaurea species collected from Central Anatolia region of Turkey.
abstract: Antioxidant capacities of methanolic extract and fatty acid composition of three Centaurea species were investigated. The antioxidant capacity of the extracts was evaluated by different assays, including total phenolic content, phosphomolybdenum assay, free radical scavenging activity (DPPH assay), beta-carotene/linoleic acid bleaching assay, iron (III) and cupric reduction assay. The findings showed that the methanolic extract of Centaurea pulchella has the strongest antioxidant capacity compared to other two Centaurea species. The order of the antioxidant properties of Centaurea species were C. pulchella>C. patula>C. tchihatcheffii. Thirty fatty acids were identified in the oils of three Centaurea species. The major fatty acids of these species were found to be linoleic acid from C. pulchella and C. tchihatcheffii, and alpha-linolenic acid from C. patula. The study concluded that the Centaurea species can be used as a source of natural antioxidants and essential fatty acids.
authors.affiliation: Department of Biology, Science Faculty, Selcuk University, Konya, Turkey.
authors.forename: Gokhan
authors.initials: G
authors.lastname: Zengin
authors.forename: Yavuz Selim
authors.initials: YS
authors.lastname: Cakmak
authors.forename: Gokalp Ozmen
authors.initials: GO
authors.lastname: Guler
authors.forename: Abdurrahman
authors.initials: A
authors.lastname: Aktumsek
mesh_terms: D000975:Antioxidants / Q000494:pharmacology*; D001713:Biphenyl Compounds / Q000737:chemistry; D031179:Centaurea / Q000737:chemistry*; D002849:Chromatography, Gas; D003300:Copper / Q000737:chemistry; D005227:Fatty Acids / Q000032:analysis*; D007501:Iron / Q000737:chemistry; D019787:Linoleic Acid / Q000737:chemistry; D000432:Methanol; D010636:Phenols / Q000032:analysis; D010851:Picrates / Q000737:chemistry; D010936:Plant Extracts / Q000737:chemistry / Q000494:pharmacology; D010938:Plant Oils / Q000737:chemistry; D019163:Reducing Agents / Q000737:chemistry; D012997:Solvents; D014421:Turkey; D019207:beta Carotene / Q000737:chemistry
chemical_list: D000975:Antioxidants; D001713:Biphenyl Compounds; D005227:Fatty Acids; D010636:Phenols; D010851:Picrates; D010936:Plant Extracts; D010938:Plant Oils; D019163:Reducing Agents; D012997:Solvents; D019207:beta Carotene; D003300:Copper; D019787:Linoleic Acid; C004931:1,1-diphenyl-2-picrylhydrazyl; D007501:Iron; D000432:Methanol