Absolute Antioxidant Activity of Five Phenol-Rich Essential Oils.

ABSTRACT: Essential oils (EOs) have promising antioxidant activities which are gaining interest as natural alternatives to synthetic antioxidants in the food and cosmetic industries. However, quantitative data on chain-breaking activity and on the kinetics of peroxyl radical trapping are missing. Five phenol-rich EOs were analyzed by GC-MS and studied by oxygen-uptake kinetics in inhibited controlled autoxidations of reference substrates (cumene and squalene). Terpene-rich Thymus vulgaris (thymol 4%; carvacrol 33.9%), Origanum vulgare, (thymol 0.4%; carvacrol 66.2%) and Satureja hortensis, (thymol 1.7%; carvacrol 46.6%), had apparent kinh (30 °C, PhCl) of (1.5 ± 0.3) × 104, (1.3 ± 0.1) × 104 and (1.1 ± 0.3) × 104 M-1s-1, respectively, while phenylpropanoid-rich Eugenia caryophyllus (eugenol 80.8%) a

SUBMITTER: Guo Y 

PROVIDER: S-EPMC8434318 | biostudies-literature | 2021 Aug

REPOSITORIES: biostudies-literature