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The impact of the Z‐isomer content of carotenoids, β‐carotene and astaxanthin, on their solubility in organic solvents and crystallinity is investigated. Carotenoid samples containing different Z‐isomer contents are prepared from the high‐purity all‐E‐isomers by the thermal isomerization and filtering technique: β‐carotene, 27.4% and 89.8% Z‐isomer content; astaxanthin, 34.5% and 63.2% Z‐isomer content...
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