Abstract
The authors investigated the carotenoids of different maize varieties of white, yellow, and red-colored grains in different phases of ripening. The carotenoids extracted from the grains were separated into benzene-soluble (epiphasic) and benzene-insoluble (hypophasic) fractions, and the components of these fractions were quantitatively measured and separated. The cause of the characteristic color of the grains is the difference in concentration of zeaxanthin, the main component of the hypophasic fraction. The following other carotenoids were demonstrated also: β-carotene, β-carotene-monoepoxide, violaxanthin, β-cryptoxanthin, antheraxanthin, xanthophyll, xanthophyll-monoepoxide, α-carotene. We could best explain the origin of the different carotenoids in terms of Cholnoky's theory.
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