食品科学

• 基础研究 • 上一篇    下一篇

鲜切莲藕褐变期间酚类提取及其对自由基的清除能力

蒋 娟1,姜 丽2,傅淋然2,郁志芳2,*   

  1. 1.曲阜师范大学生命科学学院,山东 济宁 273165;2.南京农业大学食品科技学院,江苏 南京 210095
  • 出版日期:2013-08-15 发布日期:2013-09-03
  • 通讯作者: 郁志芳
  • 基金资助:

    “十二五”国家科技支撑计划项目(2012BAD27B03)

Extraction and Free Radical-scavenging Activity of Phenols from Fresh-cut Lotus Roots during Browning

JIANG Juan1,JIANG Li2,FU Lin-ran2,YU Zhi-fang2,*   

  1. 1. College of Life Sciences, Qufu Normal University, Jining 273165, China;
    2. College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
  • Online:2013-08-15 Published:2013-09-03
  • Contact: YU Zhi-fang

摘要:

从不同贮藏时间的鲜切莲藕中提取出酚类物质,经高效液相色谱法(HPLC)对其进行定性和定量分析,并对其清除自由基能力进行比较。结果表明:藕片中主要含有焦性没食子酸、羟酪胺、儿茶酚和咖啡酸4种。鲜切莲藕贮藏过程中总酚含量呈下降趋势,单位质量酚清除自由基能力则呈现先升后降最后略有上升的趋势。说明酚类物质含量的不同与其抗氧化能力存在密切联系。常温贮藏期间,鲜切藕片中的酚类物质种类不变,但含量会改变,与莲藕褐变关系密切的是焦性没食子酸、儿茶酚和咖啡酸,其中焦性没食子酸与莲藕清除自由基能力关系密切。

关键词: 鲜切, 莲藕, 酚类, 自由基, 褐变

Abstract:

Phenols were extracted from fresh-cut lotus roots during storage. Phenolic content and free radical-scavenging
capacity were studied. The phenols in fresh-cut lotus roots identified by HPLC were included gallic acid, hydroxyltyramine,
catechin and caffeic acid. The phenolic content in fresh-cut lotus roots presented a decreasing trend during storage, while
the free radical-scavenging capacity per unit mass revealed an ascending-descending-ascending trend. Meanwhile, a close
relationship between phenolic content and composition and free radical-scavenging capacity was observed. The phenolic
composition in fresh-cut lotus roots remained unchanged during storage at room temperature. Pyrogallic acid, catechol and
caffeic acid were closely correlated with browning, especially the amount of pyrogallic acid.

Key words: fresh-cut, lotus root, phenols, free radicals, browning

中图分类号: