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DOI: 10.1055/s-0032-1320922
Antioxidant activity some endemic Iranian medicinal plants (Lamiaceae)
Oxidation, deterioration, and microbial reactions occurring in food products may cause economic loss. Deterioration of lipids is catalysed by different internal and external factors, such as free radicals, metal ions, light, and heat. In this study, some of the Iranian endemic plants were collected from their natural location in Chaharmahal va Bakhtiari. By maceration method with methanol solvent, extracts were obtained. Antioxidant activity of methanolic extracts was evaluated by three antioxidant assays: DPPH, FRAP & TEAC. In DPPH assay, comparing all the plant extracts for their IC50 values, Dracocephalum multicaule Montbr & Auch and Thymus daenensis Celak was the most effective scavenging of free radical, with value of 35.30 and 39mg/ml. Among the plant extracts were evaluated in FRAP assay, T. daenensis showed relatively strong ferric ion reducing activities with 2.37mg/ml. in TEAC assay, IC50 value of T. daenensis was determine to be 1.21mg/ml. Extract of T. daenensis exhibited the highest phenolics, and extract of D. multicaule exhibited the highest flavonoids.