Identification by epr spectroscopy of carvacrol and thymol as the major sources of free radicals in the oxidation of plant essential oils

Nigel Deighton, Sheila M. Glidewell, Stanley G. Deans, Bernard A. Goodman

Research output: Contribution to journalArticle

72 Citations (Scopus)

Abstract

The formation of stable free radicals upon reaction of the essential oils of 10 plant species with ultraviolet radiation and the superoxide radical anion, O2, has been investigated by electron paramagnetic resonance (EPR) spectroscopy. Only the oils from oregano, summer savory and thyme produced EPR spectra and the results can be accounted for in terms of free radicals produced by the closely related phenolics, carvacrol and thymol. These observations are interpreted in terms of the known antioxidant properties of these molecules.

Original languageEnglish (US)
Pages (from-to)221-225
Number of pages5
JournalJournal of the Science of Food and Agriculture
Volume63
Issue number2
DOIs
StatePublished - Jan 1 1993

Fingerprint

Thymol
Plant Oils
carvacrol
thymol
electron paramagnetic resonance spectroscopy
Electron Spin Resonance Spectroscopy
Volatile Oils
Superoxides
Free Radicals
spectroscopy
Spectrum Analysis
essential oils
Satureja
Satureja hortensis
Thymus Plant
oxidation
Origanum
oregano
thyme
superoxide anion

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Food Science
  • Agronomy and Crop Science
  • Nutrition and Dietetics

Cite this

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abstract = "The formation of stable free radicals upon reaction of the essential oils of 10 plant species with ultraviolet radiation and the superoxide radical anion, O2−, has been investigated by electron paramagnetic resonance (EPR) spectroscopy. Only the oils from oregano, summer savory and thyme produced EPR spectra and the results can be accounted for in terms of free radicals produced by the closely related phenolics, carvacrol and thymol. These observations are interpreted in terms of the known antioxidant properties of these molecules.",
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Identification by epr spectroscopy of carvacrol and thymol as the major sources of free radicals in the oxidation of plant essential oils. / Deighton, Nigel; Glidewell, Sheila M.; Deans, Stanley G.; Goodman, Bernard A.

In: Journal of the Science of Food and Agriculture, Vol. 63, No. 2, 01.01.1993, p. 221-225.

Research output: Contribution to journalArticle

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AB - The formation of stable free radicals upon reaction of the essential oils of 10 plant species with ultraviolet radiation and the superoxide radical anion, O2−, has been investigated by electron paramagnetic resonance (EPR) spectroscopy. Only the oils from oregano, summer savory and thyme produced EPR spectra and the results can be accounted for in terms of free radicals produced by the closely related phenolics, carvacrol and thymol. These observations are interpreted in terms of the known antioxidant properties of these molecules.

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