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- W2076691922 abstract "The photosynthetic marine dinoflagellate,Gyrodinium resplendens, was grown axenically and harvested during logarithmic growth for analysis of its lipid-soluble pigments. Chlorophylla and 8 carotenoids were isolated from the methanol and acetone extract by column and thin-layer chromatography. Chlorophyllc was isolated by partitioning the total extract between saline aqueous acetone and hexane.Absorption spectra taken in hexane, ethanol, methanol and carbon disulfide confirm the presence of beta-carotene, peridinin, dinoxanthin and diadinoxanthin as major carotenoids.Four new minor xanthophylls are also described, one of which, namedpyrrhoxanthin, resembles an alkali-labile keto-epoxide. At least one of the minor xanthophylls occurs as an ester.Diadinoxanthin fromGyrodinium and antheraxanthin fromEuglena gracilis seem to be identical with respect to absorption curves, polarity, number of 5, 6-epoxy groups and lack of allylic hydroxyl groups; however, co-chromatography of stereoisomers after iodine-isomerization showed slight differences.Most of the carotenoids are further characterized here by their partition ratios between hexane and 95% methanol. Several of the carotenoids were tested for the presence of 5, 6-epoxy and allylic hydroxyl groups. Four of the pigments, comprising 91% of the total carotenoids are revealed as 5,6-monoepoxides by their instability toward dilute acid. One carotenoid resembles a diepoxide." @default.
- W2076691922 created "2016-06-24" @default.
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- W2076691922 date "1968-01-01" @default.
- W2076691922 modified "2023-10-18" @default.
- W2076691922 title "Chloroplast pigments of the marine dinoflagellate<i>Gyrodinium resplendens</i>" @default.
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- W2076691922 doi "https://doi.org/10.1007/bf02530961" @default.
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