大枣浓缩汁贮藏过程中非酶褐变动力学研究
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(天津天狮学院,天津 301700)

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韩希凤(1978—)女,天津天狮学院讲师,硕士。E-mail: hanxf07@163.com

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天津天狮学院校级课题(编号:K13003)


Kinetic study of non-enzymatic browning in Chinese jujube concentrate during storage
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(Tianjin Tianshi College, Tianjin 301700, China)

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    摘要:

    在4,26,37 ℃条件下对大枣浓缩汁进行7个月的贮藏,并分别用零级、一级动力学模型对产品中与非酶褐变相关的指标还原糖、抗坏血酸(Vc)、羟甲基糠醛(HMF)随贮藏时间的变化进行拟合分析。结果表明:还原糖含量的动态变化零级模型拟合度优于一级的,Vc含量的动态变化一级模型拟合度优于零级的。4,26,37 ℃贮藏条件下,大枣浓缩汁中的HMF和A420变化呈线性关系,同时颜色参数(A420、L*、Chroma值)是HMF的函数,具有相关性,可用一级动力学方程表示。26,37 ℃贮藏过程中大枣浓缩汁的颜色参数及还原糖、Vc含量变化显著(P<0.05),明显高于4 ℃贮藏,低温有利于大枣浓缩汁的贮藏。

    Abstract:

    Changes of qualities related to non-enzymatic browning in Chinese jujube concentrate at different storage temperatures (4 ℃, 26 ℃and 37 ℃) for 7 months were evaluated. Changes of reducing sugar, vitamin C, 5-hydroxymethylfurfural (HMF) were fitted with zero-order, first-order models respectively. The results showed that the fit of the zero-order model was superior to the first-order model to explain the kinetic changes of reducing sugar, and the fit of the first-order model was superior to the zero-order model to explain the kinetic changes of Vc. At 4 ℃, 26 ℃ or 37 ℃, a correlation between HMF formation and A420 was observed, and color conditions (A420, L*, Chroma) could be expressed by first-order equations as functions of HMF. Higher storage temperature (26 ℃and 37 ℃) had significant effects (P<0.05) on changes of color conditions (A420, L*, Chroma), reducing sugar, vitamins C in Chinese jujube concentrate, significantly higher than 4 ℃ storage, could be protect well during lower temperature storage.

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韩希凤,李书启,乔镜澄,等.大枣浓缩汁贮藏过程中非酶褐变动力学研究[J].食品与机械,2015,31(3):131-134.
HANXifeng, LiShuqi, QiaoJingcheng, et al. Kinetic study of non-enzymatic browning in Chinese jujube concentrate during storage[J]. Food & Machinery,2015,31(3):131-134.

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  • 收稿日期:2014-11-09
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  • 在线发布日期: 2023-03-17
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