Radicalformation in individual aqueous solutions of some unsaturated fatty acids and in their mixtures
Journal of Clinical Biochemistry and Nutrition, ISSN: 0912-0009, Vol: 63, Issue: 2, Page: 90-96
2018
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Metrics Details
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Article Description
This study examines oxidizabilityin individual aqueous solutions of oleic acid, linoleic acid, a-linolenic acid, y-linolenic acid and arachidonic acid, and in their mixtures. We used electron spin resonance (ESR), high performance liquid chromatography-electron spin resonance (HPLC-ESR) and high performance liquid chromato-graphy-electron spin resonance-mass spectrometries (HPLC-ESR-MS). We detected 4-carboxybutyl radical derived from y-linolenic acid, ethyl and 7-carboxyheptyl radicals derived from a-linolenic acid, and pentyl and 7-carboxyheptyl radicals derived from linoleic acid. HPLC-ESR analyses for the individual aqueous solutions of linoleic acid, a-linolenic acid, y-linolenic acid and arachidonic acid showed less radical form for polyunsaturated fatty acids with more double bonds. On the other hand, HPLC-ESR peak height of 4-carboxybutyl radical, which form through hydrogen atom abstraction at the carbon close to the carboxy end, increased for linoleic acid/γ-linolenic acid, a-linolenic acid/γ-linolenic acid, and y-linolenic acid/oleic acid mixtures compared to before mixing. Conversely, HPLC-ESR peak heights of ethyl, 7-carboxyheptyl and pentyl radicals, which form through hydrogen atom abstraction at the carbons close to the methyl end, decreased for linoleic acid/ a-linolenic acid, linoleic acid/γ-linolenic acid, linoleic acid/oleic acid, linoleic acid/arachidonic acid, a-linolenic acid/γ-linolenic acid, and a-linolenic acid/oleic acid mixtures compared to before mixing.
Bibliographic Details
The Society for Free Radical Research Japan
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