Degradation kinetics of vitamin C in Chinese jujube during drying process

机译：枣干燥过程中维生素C的降解动力学。

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In order to investigate the effects of drying temperature on the vitamin C in Chinese jujube and provide reference for the drying process, the degradation kinetics of ascorbic Acid (AA) and dehydroascorbic Acid (DHAA) at 50, 60 and 70"C has been investigated. The results showed that the loss of AA at different drying temperatures followed the Weibull model and all the correlation coefficients( R2 )were higher than 0.99. The kinetic model of DHAA well fitted its degradation in Chinese jujube. Both AA and DHAA in . Chinese jujube decreased during the drying process, however, the degradation rates of DHAA was lower than that of A A and its activation energy was higher than that of AA, these results indicate that DHAA in Chinese jujube was more stable than AA in thermodynamics. The kinetic modal can be used to predict the concentrations of vitamin C during the drying process of jujube.

机译：为了研究干燥温度对大枣中维生素C的影响并为干燥过程提供参考，研究了50、60和70“ C下抗坏血酸（AA）和脱氢抗坏血酸（DHAA）的降解动力学。结果表明，在不同的干燥温度下，AA的损失均遵循Weibull模型，所有相关系数（R2）均大于0.99； DHAA的动力学模型很好地拟合了其在枣中的降解，AA和DHAA均对枣具有良好的降解作用。枣在干燥过程中下降，但是DHAA的降解率低于AA，其活化能高于AA，这些结果表明DHAA在热力学上比AA稳定。可用于预测枣干过程中维生素C的浓度。

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来源
《2011 International Conference on New Technology of Agricultural Engineering》|2011年|784-788|共5页
会议地点 Zibo(CN)
作者
Liu Kun; Lu Zhoumin; Yan Zhongxin; Zhao Jiaqi; Jiao Wenyue; Li Xingang;
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作者单位

College of Food Science and Engineering, Northwest A F University, Yangling, Shaanxi 712100, China;

College of Forestry, Northwest A F University, Yangling, Shaanxi 712100, China;

College of Food Science and Engineering, Northwest A F University, Yangling, Shaanxi 712100, China;

College of Forestry, Northwest A F University, Yangling, Shaanxi 712100, China;

College of Forestry, Northwest A F University, Yangling, Shaanxi 712100, China;

College of Forestry, Northwest A F University, Yangling, Shaanxi 712100, China;

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会议组织
原文格式 PDF
正文语种 eng
中图分类农业工程;
关键词
Chinese jujube; drying; hot air heating; vitamin C; degradation; kinetics;

机译：枣烘干;热风加热；维生素C;降解;动力学;

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Degradation kinetics of vitamin C in Chinese jujube during drying process

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