Research Information System
Pharmaceutical Biology, vol.44, no.2, pp.107-112, 2006 (SCI-Expanded)
In this study, antioxidant properties of Thymus sipyleus Boiss. subsp. sipyleus var. sipyleus, Teucrium chamaedrys L., Mentha longifolia (L.) Hudson subsp. longifolia, Salvia limbata C.A. Meyer, and Thymus fallax Fisch. & Mey. were investigated. Antioxidant and 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activities, reducing powers, and the amount of total phenolic compounds of the extracts were studied. The highest antioxidant activity was shown by T. chamaedrys (decoction, IC50: 9.2 μg/ml), and the lowest one was S. limbata (decoction, IC50: 619.5 μg/ml). The highest DPPH radical scavenging activity was shown by T. fallax [decoction, IC50S: 56 μg/ml (IC50S is the extract concentration (μg/ml) required for 50% inhibition of the DPPH solution absorbance at 517 nm)] while the lowest one was S. limbata (decoction, IC50S: 335.8 μg/ml). The highest reducing power and amount of total phenolic compounds was shown by T. chamaedrys (decoction, 29.9 μg/ml ascorbic acid equivalent, 27.9 μg/ml gallic acid equivalent, respectively), and the lowest one was S. limbata (decoction, 5.1 μg/ml ascorbic acid equivalent, 9.9 μg/ml gallic acid equivalent, respectively) at 250 μg/ml extract concentration. © 2006 Taylor & Francis Group, LLC.