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Identification and Characterization of a Mammalian Enzyme Catalyzing the Asymmetric Oxidative Cleavage of Provitamin A*
In vertebrates, symmetricversus asymmetric cleavage of β-carotene in the biosynthesis of vitamin A and its derivatives has been controversially discussed. Recently we have been able to identify aExpand
Carotenoids and carotenoid esters in potatoes (Solanum tuberosum L.): new insights into an ancient vegetable.
The carotenoid pattern of four yellow- and four white-fleshed potato cultivars (Solanum tuberosum L.), common on the German market, was investigated using HPLC and LC(APCI)-MS for identification andExpand
Modern application of xanthophylls in animal feeding – a review
Most consumers associate colour of food with age and health status of animals and food quality in consequence. Xanthophylls are widely used as feed additives to generate products meeting consumers'Expand
Identification and quantification of astaxanthin esters in shrimp (Pandalus borealis) and in a microalga (Haematococcus pluvialis) by liquid chromatography-mass spectrometry using negative ion
  • D. Breithaupt
  • Chemistry, Medicine
  • Journal of agricultural and food chemistry
  • 19 May 2004
Negative ion liquid chromatography-atmospheric pressure chemical ionization mass spectrometry [negative ion LC-(APCI)MS] was used for the identification of astaxanthin esters in extracts ofExpand
Simultaneous HPLC determination of carotenoids used as food coloring additives: applicability of accelerated solvent extraction
A sensitive HPLC multimethod was developed for the determination of the carotenoid food additives (CFA) norbixin, bixin, capsanthin, lutein, canthaxanthin, β-apo-8′-carotenal, β-apo-8′-carotenoicExpand
Identification and quantification of zeaxanthin esters in plants using liquid chromatography-mass spectrometry.
It has been suggested that lutein and zeaxanthin may decrease the risk for age-related macular degeneration. Surprisingly, oleoresins rich in zeaxanthin are not yet available on the market. SeveralExpand
Differentiation between lutein monoester regioisomers and detection of lutein diesters from marigold flowers (Tagetes erecta L.) and several fruits by liquid chromatography-mass spectrometry.
Liquid chromatography-atmospheric pressure chemical ionization mass spectrometry (LC-APCIMS) was employed for the identification of eight lutein monoesters, formed by incomplete enzymaticExpand
Comparison of plasma responses in human subjects after the ingestion of 3R,3R'-zeaxanthin dipalmitate from wolfberry (Lycium barbarum) and non-esterified 3R,3R'-zeaxanthin using chiral
Age-related macular degeneration (AMD) is one of the most common eye diseases of elderly individuals. It has been suggested that lutein and zeaxanthin may reduce the risk for AMD. InformationExpand
Xanthophylls in commercial egg yolks: quantification and identification by HPLC and LC-(APCI)MS using a C30 phase.
The xanthophylls lutein and zeaxanthin have attracted a lot of interest since it was presumed that an increased nutritional uptake may prevent adult macula degeneration (AMD). Although egg yolksExpand