title: Antioxidant activities of rosemary (Rosmarinus Officinalis L.) extract, blackseed (Nigella sativa L.) essential oil, carnosic acid, rosmarinic acid and sesamol.
abstract: Antioxidant activities of three pure compounds: carnosic acid, rosmarinic acid and sesamol, as well as two plant extracts: rosemary extract and blackseed essential oil, were examined by applying DPPH and ABTS(+) radical-scavenging assays and the ferric thiocyanate test. All three test methods proved that rosemary extract had a higher antioxidant activity than blackseed essential oil. The order of antioxidant activity of pure compounds showed variations in different tests. This was attributed to structural factors of individual compounds. Phenolic contents of blackseed essential oil and rosemary extract were also determined. Rosemary extract was found to have a higher phenolic content than blackseed essential oil. This fact was utilised in explaining the higher antioxidant activity of rosemary extract.
authors.affiliation: Department of Chemistry, Faculty of Arts and Sciences, Akdeniz University, 07058 Antalya, Turkey.
authors.forename: Naciye
authors.initials: N
authors.lastname: Erkan
authors.affiliation: Department of Chemistry, Faculty of Arts and Sciences, Akdeniz University, 07058 Antalya, Turkey.
authors.forename: Guler
authors.initials: G
authors.lastname: Ayranci
authors.affiliation: Department of Chemistry, Faculty of Arts and Sciences, Akdeniz University, 07058 Antalya, Turkey. Electronic address: eayranci@akdeniz.edu.tr.
authors.forename: Erol
authors.initials: E
authors.lastname: Ayranci
keywords: Antioxidant activity; Blackseed essential oil; Carnosic acid; Rosemary extract; Rosmarinic acid; Sesamol