Volumes Archive
Vol. 45, Number 3, 2003
Comparison of Total Flavonoid and Phenol Contents and Antioxidant Capacities of Three Hypericum L. Species Growing in Turkey
Türkiye'de Yetişen üç Hypericum L. Türünün Total Flavonoid ve Fenol içerikleri ile Antioksidan Kapasitelerinin Karşılaştırılması
Gozde (Elgin). Meral* and Sibel Konyalıoglu**
Ege University, Faculty ofPharmacy, *Department of Pharmaceutical Botany, **Department of Biochemistry, 35100 Bornova, Izmir,Turkey
Abstract
The first aim of the present study was to investigate the probable antioxidant effect of the total extracts of Hypericum perforatum L., H. empetrifolium Willd, H. triquetrifolium Turra. Secondary aim was to expose total flavonoid and phenol contents of these extracts. The extracts were analysed for the determination of antioxidant activity by posphomolibdenum spectrophotometric method and total flavonoid content by using the aluminum-chloride method. Total phenol estimation was determined by the colorimetric method modified Mc Donald at 765 nm using the Folin-ciocalteus Rengent. Our results clearly demonstrate that all extracts have antioxidnnt capacity. The inventions of nntioxidant capacity harmonize with total flavonoid and phenol contents.
Key words: Hypericum perforatum, Hypericum triquetrifolium,Hypericum empetrifolium, Total flavonoid, Total phenol, Antioxidant capacity .
