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KMID : 1007520230320101351
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Food Science and Biotechnology
2023 Volume.32 No. 10 p.1351 ~ p.1359
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Color stability and degradation kinetics of anthocyanins in mulberry stirred yoghurt fermented by different starter cultures
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Xin Cheng
Jinpeng Zhu
Zhijie Chen
Zhihao Wu
Fuqiang Zhang
Caie Wu
Gongjian Fan
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Abstract
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To evaluate the storage stability of anthocyanin in stirred yoghurt, mulberry juice and different starter cultures (S) were added into milk to investigate the color stability and degradation kinetics of anthocyanin. The result showed that the redness value decreased, while the brightness value increased, and the anthocyanin content decreased significantly from 1.47?~?1.86 to 1.01?~?1.19 mg/g. The degradation kinetics followed a first-order reaction. Principal component analysis showed that S2 and S6 were correlated with anthocyanins, S8 and S4 were correlated with a*. At the later stage, S4, S8 were correlated with a*, while S2, S4, S6 were correlated with anthocyanins. At 28th day, the anthocyanin content of S4 was 1.14 mg/g, which was not the highest, but the total score was the highest. Therefore, S4 was the best choice when the storage period is 28 days. This study provided technical support for the selection of a better starter for stirring yoghurt.
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KEYWORD
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Mulberry, Stirred yoghurt, Starter culture, CIEL*a*b* coordinates, Anthocyanin analysis, Degradation kinetics
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