食品科学

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蜡质玉米乙酰化磷酸二淀粉酯对复原乳酸化凝胶的影响

洪 雁1,孙慢慢1,顾正彪1,*,田 颖2   

  1. 1.江南大学食品学院,食品科学与技术国家重点实验室,江苏 无锡 214122;
    2.苏州高峰淀粉科技有限公司,江苏 苏州 215100
  • 出版日期:2013-10-15 发布日期:2013-09-27
  • 通讯作者: 顾正彪
  • 基金资助:

    “十二五”国家科技支撑计划项目(2012BAD367B01)

Effect of Acetylated Waxy Maize Distarch Phosphate on Acid-induced Gelation of Reconstituted Milk

HONG Yan1,SUN Man-man1,GU Zheng-biao1,*,TIAN Ying2   

  1. 1. State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University,
    Wuxi 214122, China;2. Suzhou Gaofeng Starch Technology Co. Ltd., Suzhou 215100, China
  • Online:2013-10-15 Published:2013-09-27
  • Contact: GU Zheng-biao

摘要:

研究蜡质玉米乙酰化磷酸二淀粉酯(AWMDP)对复原乳酸化凝胶的影响,并以蜡质玉米淀粉(WM)为对照。结果表明:AWMDP添加量为0.5%~1.5%时,促进蛋白凝胶网络的形成,使形成的凝胶强度增加。WM添加量大于0.5%时,阻碍蛋白凝胶网络的形成,使形成的凝胶强度降低。激光共聚焦显微镜照片显示,添加1.5% AWMDP的凝胶蛋白网络结构致密均匀,膨胀的蜡质玉米乙酰化磷酸二淀粉酯颗粒嵌入在蛋白网络结构中;而添加1.5% WM的凝胶蛋白质网络结构不连续。

关键词: 变性淀粉, 复原乳, 流变特性, 微观结构

Abstract:

The effect of acetylated waxy maize distarch phosphate (AWMDP) on the acid-induced gelation of reconstituted
milk was investigated using waxy maize (WM) as the control. Addition of AWMDP at levels of 0.5%-1.5% facilitated
the formation of protein gel networks, and increased the final gel strength. On the contrary, when the addition level of WM
was higher than 0.5%, WM blocked the formation of protein gel networks, and decreased the final gel strength. The CSLM
micrographs of gels with 1.5% AWMDP showed a dense continuous network, and the swollen modified starch granules
were embedded in the protein network, while the protein network with 1.5% WM was discontinuous.

Key words: modified starch, reconstituted milk, rheological properties, microstructure

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