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The effect of long-term storage on the carotenoid composition in durum wheat and tritordeum grains was studied. Total carotenoid (mainly lutein) content decreased according to a temperature dependent first-order degradative kinetic model. The carotenoid retention was similar in both genotypes at the lower temperatures (71–73% at −32°C, 70% at 6°C and 55–56% at 20°C), whereas at the higher temperatures...
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