Abstract
In this study, antioxidant activities of aqueous extracts from of Thymus longicaulis subsp. chaubardii (Rchb.f.) Jalas and T. longicaulis subsp. longicaulis C. presl were investigated. Infusion and decoction methods were used to prepare aqueous extracts. 1, 1-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging, β-carotene linoleic acid and CUPRAC methods were used to determined antioxidant activities. Aqueous extracts of species exhibited good antioxidant activity. Especially, higher antioxidant capacity was found in decoction extracts compared to infusion extracts for all methods.
Highlights
Lamiaceae (Labiatae) family has 300–400 endemic species which widely distributed worldwide in particular in the region of Mediterranean
Butylated hydroxyanisole (BHA) and butylated hydroxytoluene (BHT) were used as standard compounds
IC50 values for BHA and BHT were found to be 13.40 μg/mL and 12.84 μg/mL, respectively. These results showed that the free radical scavenging effect of T. longicaulis subsp. longicaulis decoction was higher than both of BHA and BHT
Summary
Lamiaceae (Labiatae) family has 300–400 endemic species which widely distributed worldwide in particular in the region of Mediterranean. The essential oils were found to be rich in phenolic compounds, especially carvacrol [5,6,7,8] These species are native to region of Marmara, Aegean and Black sea in Turkey and used as traditional medicine because of their biological properties. Thymus species are known as source of phenolic compounds which have strong antioxidant activities [9]. There are few reports about chemical compounds and biological activities of various solvent extracts of T. zygioides Griseb [15], T. longicaulis subsp. Biological activities of diverse extracts and essential oils of Thymus species have previously been reported. To our best knowledge, there are no reports about the antioxidant capacity of aqueous extracts of T. longicaulis subsp. We wish to report the antioxidant activities of aqueous extracts of T. longicaulis subsp.
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