文献类型： 外文期刊

作者： Cai, YZ ¹ ; Sun, M ² ; Corke, H ³ ;

作者机构： 1.Univ Hong Kong, Dept Bot, Hong Kong, Peoples R China

2.Univ Hong Kong, Dept Zool, Hong Kong, Peoples R China

3.Hubei Acad Agr Sci, Inst Agr Modernizat, Wuhan 430064, Peoples R China

期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：5.279； 五年影响因子：5.269 ）

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收录情况： SCI

摘要： Color, spectral characteristics, and stability of betacyanin pigments of 21 genotypes from 7 Amaranthus species were evaluated. Wide variation in color characteristics and significant differences in pigment stability were found as much within as between Amaranthus species. Amaranthus betacyanins, like red beet pigments, were susceptible to temperature and also affected by pH, light, air, and water activity, with better pigment stability at lower temperatures (less than or equal to 14 degrees C) in the dark and in the absence of air. Storage stability at 25 degrees C of dried Amaranthus pigments (t(1/2) = 23.3 months) was longer than that of aqueous pigment extracts (t(1/2) = 1.04 months), indicating that the dried pigments were stable enough to be used as commercial colorants. The betacyanins from some better pigment genotypes (Cr015, Sheng07, Tr010, Cr072, Cr017, etc.) exhibited brighter red-violet color characteristics and were similar in stability to red radish anthocyanins under selected conditions. These characteristics of Amaranthus pigments give them considerable potential for development for use in the food industry, particularly for low-temperature uses. [References: 23]