ISHS Acta Horticulturae 826: I International Medicinal and Aromatic Plants Conference on Culinary Herbs
THE CHEMICAL COMPOSITION OF ESSENTIAL OIL AND ANTIOXIDANT ACTIVITY OF VARIOUS EXTRACTS OF CORIDOTHYMUS CAPITATUS (L.) REICHB. |
| Authors: | M. Harmandar, M.E. Duru, M. Diri, M.A. Özler, I. Kıvrak |
| Keywords: | Lamiaceae, volatile oil, carvacrol, β-carotene, radical scavenging, phenolic |
| Abstract:
In this study, essential oil compounds from the aerial parts of Coridothymus capitatus (L.) Reichb. were analysed by GC and GC/MS system, and total 28 constituents were identified. The main components were characterized as carvacrol (76,59%), &alpha:-phellandrene (6,04%), 1-octen-3-ol (5,13%), ß-caryophyllene (3,95%) and  -terpinene (1,72%). In addition, the antioxidant properties of essential oil and water and ethanol extracts from C. capitatus were examined.
The antioxidant activity was investigated with three different methods: the ß-carotene bleaching test, the 2,2’-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging method and the total phenolic content.
The total antioxidant activity measured by the ß-carotene bleaching test was highest in C. capitatus water extract (95,7%) while the free radical scavenging activity was highest in the plant’s ethanol extract (90,7%). The amount of phenolic compounds in C. capitatus water extract was found higher than the value expected [55.70±1.59, pyrocatechol equivalent (µg mg-1)].
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