Carotenoid scavenging of radicals
- 1 May 1993
- journal article
- Published by Springer Nature in Zeitschrift für Lebensmittel-Untersuchung und Forschung
- Vol. 196 (5) , 423-429
- https://doi.org/10.1007/bf01190806
Abstract
Es wurde die Entfernung von freien Radikalen beim Carotenoid untersucht durch Peroxidation der Methylester der ungesättigten Fettsäuren unter Verwendung von Metmyoglobin in einem heterogenen Lipid/Wasser-System und azo-bis-Isobutyronitril wie ein freier Radikal-Initiator in einer homogenen Chloroform-Lösung. Für das heterogene System, unter Verwendung einer Kombination einer elektrochemischen Messung der Sauerstoffverminderung, der spektrophotometrischen Bestimmung der Lipidhydroperoxide und des Carotenoidabbaues wurde demonstriert, daß jedes der vier Carotenoide, Astaxanthin,β-Carotin, Canthaxanthin und Zeaxanthin, die Methylester gegen Oxidation schützt. Der antioxidative Effekt steigt mit fallendem Sauerstoffdruck (0,0102Canthaxanthin>β-Carotin >Zeaxanthin. Jedes der vier Carotenoide kann die Lipidoxidation unterdrücken, der Grad der Unterdrükkung der Peroxidation des Methyllinolats entspricht dem Unterschied in der Stabilität. Carotenoid scavenging of free radicals has been investigated in peroxidizing methyl esters of unsaturated fatty acids using (i) metmyoglobin as a water-based freeradical initiator in a heterogeneous lipid/water system, and (ii) azo-bis-isobutyronitrile as a free-radical initiator in a homogeneous chloroform solution. For the heterogeneous system, using a combination of electrochemical oxygen depletion measurements, spectrophotometric determination of lipid hydroperoxides and carotenoid degradation, it was demonstrated that each of the four carotenoids astaxanthin,β-carotene, canthaxanthin, and zeaxanthin protects the methyl esters against oxidation. The antioxidative effect increases with increasing carotenoid concentration, increases with decreasing oxygen partial pressure (0.010< pO2 canthaxanthin>β-carotene>zeaxanthin. Each of the four carotenoids can suppress lipid oxidation and the degree of suppression of peroxidation of methyl linoleate corresponds to the difference in stability.Keywords
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