title: Screening for in vitro antioxidant properties and fatty acid profiles of five Centaurea L. species from Turkey flora.
abstract: Centaurea species are used for the treatment of various ailments in the popular medicine in some countries. This study was designed to examine antioxidant potentials and fatty acid profiles of five Centaurea species from Turkey flora. Antioxidant properties of methanolic extracts from these species were evaluated by six different methods: phosphomolybdenum assay, free radical scavenging assay, β-carotene/linoleic acid test system, metal chelating activity, ferric and cupric reducing power. Total phenolic and flavonoid concentrations of each extract were also determined using the Folin-Ciocalteu reagent and aluminum chloride. The results of these assay showed a significant antioxidant capacity in all researched extracts. Centaurea cheirolopha extract, with the highest amount of total phenolic and flavonoids, showed the highest antioxidant activities in all assay, except for metal chelating. Fatty acid profiles of these species were examined by GC-FID and 30 fatty acids were identified. Palmitic, linoleic, oleic, and linolenic acid were detected as the main components. The results of the study indicated that the Centaurea species can be considered as a source of new natural antioxidants and unsaturated fatty acids for food, cosmetic and pharmaceutical industries.
authors: Department of Biology, Science Faculty, Selcuk University, Konya, Turkey. aktumsek@selcuk.edu.tr
authors: Abdurrahman
authors: A
authors: Aktumsek
authors: Gokhan
authors: G
authors: Zengin
authors: Gokalp Ozmen
authors: GO
authors: Guler
authors: Yavuz Selim
authors: YS
authors: Cakmak
authors: Ahmet
authors: A
authors: Duran
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000737:chemistry*; D001713:Biphenyl Compounds; D031179:Centaurea / Q000737:chemistry*; D002614:Chelating Agents / Q000737:chemistry; D005227:Fatty Acids / Q000737:chemistry*; D047309:Flavones / Q000737:chemistry; D005609:Free Radicals; D019787:Linoleic Acid / Q000737:chemistry; D008670:Metals / Q000737:chemistry; D010636:Phenols / Q000737:chemistry; D010851:Picrates; D010938:Plant Oils / Q000737:chemistry; D013045:Species Specificity; D014421:Turkey; D019207:beta Carotene / Q000737:chemistry
chemical_list: D000975:Antioxidants; D001713:Biphenyl Compounds; D002614:Chelating Agents; D005227:Fatty Acids; D047309:Flavones; D005609:Free Radicals; D008670:Metals; D010636:Phenols; D010851:Picrates; D010938:Plant Oils; D019207:beta Carotene; D019787:Linoleic Acid; C004931:1,1-diphenyl-2-picrylhydrazyl