王正东,戚向阳,曹少谦

• 1:上海海洋大学食品学院
• 2:浙江万里学院生物与环境学院

摘要(Abstract)：

【目的】为探索脉冲强光技术在杨梅汁加工中的应用,【方法】采用分光光度法和色差法研究了不同脉冲强光处理和热处理对杨梅汁中酚类物质含量,色泽以及其抗氧化活性的影响。【结果】结果表明,脉冲强光可显著降解杨梅汁中的花色苷(P<0.05),且杨梅汁中的花色苷的含量随着脉冲能量的增加而降低。而杨梅汁中总酚的含量却是随着脉冲能量的增加显著上升(P<0.05)。脉冲强光处理对杨梅汁抗氧化活性的影响随反应体系不同而异。杨梅汁清除.DPPH活性随着脉冲强光处理能量的增加而增大,并与花色苷的含量呈一定的负相关(R2=0.848 6),而脉冲强光处理却使杨梅汁清除超氧阴离子和羟基自由基的活性有所下降。【结论】与传统的热杀菌相比,脉冲强光处理可更好的保持其活性成分和品质,脉冲强光技术在果汁中具有较好的应用前景。

关键词(KeyWords)： 杨梅汁;脉冲强光;酚类物质;色泽;抗氧化活性

Abstract:

Keywords:

基金项目(Foundation): “十二五”农村领域国家科技计划项目(2011BAD23B02)

作者(Author): 王正东,戚向阳,曹少谦

DOI: 10.13925/j.cnki.gsxb.2012.04.001

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