食品科学 ›› 2022, Vol. 43 ›› Issue (16): 68-72.doi: 10.7506/spkx1002-6630-20210803-036

• 食品化学 • 上一篇    下一篇

A1与A2 β-酪蛋白酸奶产品特性的比较

徐小爽,韩翼宇,李逍遥,彭秋琦,罗文静,于景华   

  1. (1.天津科技大学食品科学与工程学院,天津 300450;2.中国饮料工业协会,北京 100000)
  • 出版日期:2022-08-25 发布日期:2022-08-31
  • 基金资助:
    “十三五”国家重点研发计划重点专项(2018YFC1604301-01)

Comparative Study on the Characteristics of A1 and A2 β-Casein Yogurt

XU Xiaoshuang, HAN Yiyu, LI Xiaoyao, PENG Qiuqi, LUO Wenjing, YU Jinghua   

  1. (1. College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300450, China; 2. China Beverage Industry Association, Beijing 100000, China)
  • Online:2022-08-25 Published:2022-08-31

摘要: 探究分别含有A1、A2两种β-酪蛋白牛乳制成的搅拌型和凝固型酸奶产品特性的区别。持水力结果表明,A1 β-酪蛋白酸奶(凝固型和搅拌型)的持水力大于69%,A2 β-酪蛋白酸奶(凝固型和搅拌型)的持水力大于65%。质构特性的结果显示,凝固型酸奶差距更为明显,A1 β-酪蛋白酸奶的硬度和稠度分别比A2 β-酪蛋白酸奶高41.4%和59.8%。此外,A1 β-酪蛋白酸奶黏性优于A2 β-酪蛋白酸奶。流变学特性与微观结构结果显示,A1 β-酪蛋白酸奶的滞后回路面积较A2 β-酪蛋白酸奶小14.6%,说明A2 β-酪蛋白制成的酸奶结构更易于被破坏,网状结构更为稀疏。本实验为A2 β-酪蛋白牛乳在酸奶制品的应用及实际生产提供一定理论支持。

关键词: A1 β-酪蛋白;A2 β-酪蛋白;持水力;质构特性;流变学特性;微观结构;酸奶制品

Abstract: The differences in characteristics between stirred and set yogurt produced from A1 or A2 β-casein milk were studied. The water-holding capacity of stirred and set yogurt produced from A1 β-casein milk was greater than 69%, and the water-holding capacity of stirred and set yogurt produced from A2 β-casein milk was greater than 65%. Textural analysis showed that the hardness and consistency of set yogurt produced from A1 β-casein milk were 41.4% and 59.8% higher than those of set yogurt produced from A2 β-casein, respectively. Compared with A2 β-casein yogurt, A1 β-casein yogurt had better viscosity. The results of rheology and microstructure showed that the hysteresis loop area of A1 β-casein yogurt was 14.6% smaller than that of A2 β-casein yogurt indicating that the former’s structure can be more easily damaged and its network structure is sparser. This study provides theoretical support for the application of A2 β-casein milk in yogurt.

Key words: A1 β-casein; A2 β-casein; water-holding capacity; texture properties; rheological properties; microstructure; yogurt

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