title: Exploring Equisetum arvense L., Equisetum ramosissimum L. and Equisetum telmateia L. as sources of natural antioxidants.
abstract: The antioxidant and scavenging activities of above ground parts of Equisetum arvense L., Equisetum ramosissimum L. and Equisetum telmateia L. phosphate buffer (pH 7) extracts were investigated. Activities of antioxidant enzymes (superoxide dismutase, catalase, guaiacol peroxidase and glutathione peroxidase), quantities of reduced glutathione, malonyldialdehyde, superoxide and hydroxyl radicals and flavonoid, soluble protein, chlorophyll a, b and carotenoid contents were determined. The total antioxidant capacity was determined by ferric reducing antioxidant power (FRAP) assay. The Equisetum telmateia extract demonstrated scavenging and antioxidant properties better than Equisetum ramosissimum and Equisetum arvense. The ESR signal of DMPO-OH radical adducts in the presence of Equisetum telmateia phosphate buffer (pH 7) extract was reduced by 98.9% indicating that Equisetum telmateia could be a useful source of antioxidants with huge scavenging ability.
authors.affiliation: Faculty of Agriculture, University of Novi Sad, Trg Dositeja Obradovića 8, 21000 Novi Sad, Serbia and Montenegro. stajnerd@polj.ns.ac.yu
authors.forename: Dubravka
authors.initials: D
authors.lastname: Stajner
authors.forename: Boris M
authors.initials: BM
authors.lastname: Popović
authors.forename: Jasna
authors.initials: J
authors.lastname: Canadanović-Brunet
authors.forename: Goran
authors.initials: G
authors.lastname: Anackov
mesh_terms: D020829:Equisetum / Q000737:chemistry* / Q000201:enzymology; D016166:Free Radical Scavengers / Q000737:chemistry*; D010936:Plant Extracts / Q000737:chemistry*
chemical_list: D016166:Free Radical Scavengers; D010936:Plant Extracts