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Geometrical isomers of violaxanthin in orange juice

Identifieur interne : 002462 ( Main/Curation ); précédent : 002461; suivant : 002463

Geometrical isomers of violaxanthin in orange juice

Auteurs : Antonio J. Melendez-Martinez [Espagne] ; Isabel M. Vicario [Espagne] ; Francisco J. Heredia [Espagne]

Source :

Food chemistry [ 0308-8146 ] ; 2007.

RBID : Pascal:07-0261997

Descripteurs français

Pascal (Inist)
- Isomère géométrique, Violaxanthine, Jus d'orange, Citrus, Caroténoïde, Impact électron, Masse.

English descriptors

KwdEn :
- Carotenoid, Citrus, Electron impact, Geometrical isomer, Mass, Orange juice, Violaxanthin.

Abstract

The geometrical isomers of carotenoids are now attracting considerable interest, due in part to the fact that they are known to behave differently in terms of susceptibility to oxidation, vitamin A activity and bioavailability. The study of such isomers has been facilitated by the development of the C₃₀ stationary phase, which has made it possible to evaluate their occurrence in any source in a rapid fashion. In this study, the violaxanthin ((35',5R,6S',3'S,5'R,6'S)-5,6:5',6'-diepoxy-5,6,5',6'-tetrahydro-β,β-carotene-3,3'-diol) fraction of orange juice (Citrus sinensis L. Osbeck) was isolated by thin-layer chromatography (TLC) to identify the different geometrical isomers occurring in it. Under the HPLC conditions described, several violaxanthin isomers were detected, of which (all-E)-violaxanthin and, above all, (9Z)-violaxanthin, happened to be the most important in quantitative terms.

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Pascal:07-0261997

Le document en format XML

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<author><name sortKey="Melendez Martinez, Antonio J" sort="Melendez Martinez, Antonio J" uniqKey="Melendez Martinez A" first="Antonio J." last="Melendez-Martinez">Antonio J. Melendez-Martinez</name>
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<author><name sortKey="Vicario, Isabel M" sort="Vicario, Isabel M" uniqKey="Vicario I" first="Isabel M." last="Vicario">Isabel M. Vicario</name>
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<author><name sortKey="Heredia, Francisco J" sort="Heredia, Francisco J" uniqKey="Heredia F" first="Francisco J." last="Heredia">Francisco J. Heredia</name>
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Geometrical isomers of violaxanthin in orange juice</title>
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<author><name sortKey="Heredia, Francisco J" sort="Heredia, Francisco J" uniqKey="Heredia F" first="Francisco J." last="Heredia">Francisco J. Heredia</name>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Carotenoid</term>
<term>Citrus</term>
<term>Electron impact</term>
<term>Geometrical isomer</term>
<term>Mass</term>
<term>Orange juice</term>
<term>Violaxanthin</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Isomère géométrique</term>
<term>Violaxanthine</term>
<term>Jus d'orange</term>
<term>Citrus</term>
<term>Caroténoïde</term>
<term>Impact électron</term>
<term>Masse</term>
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<front><div type="abstract" xml:lang="en">The geometrical isomers of carotenoids are now attracting considerable interest, due in part to the fact that they are known to behave differently in terms of susceptibility to oxidation, vitamin A activity and bioavailability. The study of such isomers has been facilitated by the development of the C<sub>30</sub>
 stationary phase, which has made it possible to evaluate their occurrence in any source in a rapid fashion. In this study, the violaxanthin ((35',5R,6S',3'S,5'R,6'S)-5,6:5',6'-diepoxy-5,6,5',6'-tetrahydro-β,β-carotene-3,3'-diol) fraction of orange juice (Citrus sinensis L. Osbeck) was isolated by thin-layer chromatography (TLC) to identify the different geometrical isomers occurring in it. Under the HPLC conditions described, several violaxanthin isomers were detected, of which (all-E)-violaxanthin and, above all, (9Z)-violaxanthin, happened to be the most important in quantitative terms.</div>
</front>
</TEI>
</record>

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Geometrical isomers of violaxanthin in orange juice

Geometrical isomers of violaxanthin in orange juice

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri