Abstract
Rosmariquinone (RQ), an ortho-quinone diterpenoid found in rosemary, was shown to act as a hydrogen-donating antioxidant. The proposed mechanism is based on the isolation of the catechol intermediate arucadiol (AD) in methyl oleate test systems. AD was also observed in a bulk soybean oil oxidation experiment, which supports the observation that RQ is converted to AD during oxidation of the oil. Because AD was found in both light-induced oxidation and autoxidation test systems, the antioxidant mechanism proceeds in a similar manner. The antioxidant activities of RQ and AD were not significantly different in the autoxidation experiments, while AD was a significantly better (P < 0.05) antioxidant than RQ in the light-induced oxidation.
Original language | English (US) |
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Pages (from-to) | 1147-1154 |
Number of pages | 8 |
Journal | JAOCS, Journal of the American Oil Chemists' Society |
Volume | 75 |
Issue number | 9 |
DOIs | |
State | Published - Sep 1998 |
Externally published | Yes |
Keywords
- Arucadiol
- Autoxidation
- Hydrogen-donating mechanism
- Light-induced oxidation
- Rosmariquinone
ASJC Scopus subject areas
- General Chemical Engineering
- Organic Chemistry