期刊
FOOD CHEMISTRY
卷 220, 期 -, 页码 153-161出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2016.09.203
关键词
Thyme; Essential oil; Antioxidant activity; DPPH; Reducing power
资金
- Isfahan University of Technology, Iran
In this study, the essential oil (EO) composition, flavonoid and phenolic contents, and antioxidant activities of fourteen Thymus accessions belonging to ten species were evaluated. Gas chromatography-mass spectrometry (GC-MS) analysis revealed the presence of 38 compounds with the major constituents including thymol (12.4-79.74%), carvacrol (4.37-42.14%), geraniol (0.3-22.44%), and p-cymene (0.8-12.86%). Cluster analysis identified three groups of high thymol, geraniol/linalool, and high carvacrol. The highest phenolic and flavonoid contents were detected in T. daenensis-1 (70.6 mg tannic acid equivalents (TAE) g(-1) DW) and T. vulgaris (8.55 mg quercetin equivalents (QE) g(-1) DW), respectively. The antioxidant activities of the samples were determined using 1,1-diphenyl-2-picrylhydrazyl (DPPH) and reducing power assay. The results demonstrated that T. daenensis-3 (IC50 = 273.36), T. vulgaris (IC50 = 289.3), and T. fedtschenkoi-3 (IC50 = 339.22) possessed higher antioxidant activities than the others. Finally, the Thymus species with high bioactive compounds may be recommended for further food applications. (C) 2016 Elsevier Ltd. All rights reserved.
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