Free Radical Mediated Oxidative Degradation of Carotenes and Xanthophylls
| Autor: | C. O. Ajanaku, Olabisi Theresa Ademosun, I. O. Olanrewaju, John C. Walton, Raphael C. Mordi |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
apo-carotenoids
Oxidative degradation canthaxanthin Carcinogenesis 030309 nutrition & dietetics oxidation Radical Pharmaceutical Science free radicals Review Conjugated system Photochemistry retinal Antioxidants Analytical Chemistry lcsh:QD241-441 03 medical and health sciences chemistry.chemical_compound 0404 agricultural biotechnology lcsh:Organic chemistry β-carotene Drug Discovery Oxidizing agent Animals Humans Canthaxanthin Physical and Theoretical Chemistry β-ionone Carotenoid chemistry.chemical_classification 0303 health sciences Quenching (fluorescence) Organic Chemistry carotenoids 04 agricultural and veterinary sciences 040401 food science chemistry Chemistry (miscellaneous) Xanthophyll Molecular Medicine Oxidation-Reduction xanthophylls |
| Zdroj: | Molecules, Vol 25, Iss 5, p 1038 (2020) Molecules |
| ISSN: | 1420-3049 |
| Popis: | This article reviews the excited-state quenching, pro-vitamin A activity and anticarcinogenicity of carotenes and xanthophylls in relation to their chemical structures. Excited-state quenching improved with the length of the conjugated chain structure. Pro-vitamin A activity was dependent on the presence of at least one beta-ionyl ring structure. The effectiveness of carotenoids as antioxidants depended on their ability to trap peroxyl radicals with production of resonance-stabilized carotenyl radicals. The products identified from oxidations of carotenes and xanthophylls with molecular oxygen and other oxidizing agents are presented. The free radical-mediated mechanisms that have been proposed to account for the different classes of products are reviewed. |
| Databáze: | OpenAIRE |
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