浙江农业学报 ›› 2021, Vol. 33 ›› Issue (3): 526-533.DOI: 10.3969/j.issn.1004-1524.2021.03.18

• 食品科学 • 上一篇    下一篇

常温贮藏期间鸡蛋清流变特性和蛋白质成分的变化

杨晓盼, 刘丽莉*(), 黄正迪, 李媛媛, 郝威铭, 张孟军, 史胜娟   

  1. 河南科技大学 食品与生物工程学院,食品加工与安全国家级教学示范中心,食品原料河南省工程技术研究中心,食品加工与质量安全控制河南省国际联合实验室,河南 洛阳 471023
  • 收稿日期:2020-08-14 出版日期:2021-04-02 发布日期:2021-03-25
  • 通讯作者: 刘丽莉
  • 作者简介:, 刘丽莉,E-mail: yangliuyilang@126.com
    杨晓盼(1994—),女,河南汝州人,硕士研究生,研究方向为食品生物技术。E-mail: yxp58166@163.com
  • 基金资助:
    国家自然科学基金(U1704114);河南省重点科技攻关项目(182102110346);河南省重大科技专项(161100110900)

Changes of rheological properties and proteins components of egg albumin during storage at room temperature

YANG Xiaopan, LIU Lili*(), HUANG Zhengdi, LI Yuanyuan, HAO Weiming, ZHANG Mengjun, SHI Shengjuan   

  1. National Experimental Teaching Demonstration Center for Food Processing and Security, Henan Engineering Technology Research Center for Food Ingredients, Henan International Joint Laboratory for Food Processing and Quality Safety Control, College of Food and Bioengineering, Henan University of Science and Technology, Luoyang 471023, China
  • Received:2020-08-14 Online:2021-04-02 Published:2021-03-25
  • Contact: LIU Lili

摘要:

以鸡蛋清为原料,探究在25 ℃贮藏期间蛋清中主要蛋白质含量和流变特性等指标的变化。结果表明:随着贮藏时间延长,卵黏蛋白含量显著(P<0.05)降低;S-卵白蛋白含量显著(P<0.05)增加,至28 d时含量达到(92.99±0.81)%;溶菌酶含量呈现显著(P<0.05)的先升高后降低的趋势,但其活力趋于下降。随着蛋白质含量的变化,蛋清的起泡性和乳化性呈现显著(P<0.05)的先增高后降低的变化,而泡沫稳定性和乳化稳定性则显著(P<0.05)降低。贮藏过程中蛋清的热变性温度与热焓值逐渐增高。在贮藏前期,蛋清的表观黏度增加,贮能模量(G')>耗能模量(G″),表现为流体的弹性性质;在贮藏后期,蛋清的表观黏度减小,G'<G″,呈现黏性特征。该研究可为进一步深入探究蛋清的稀化现象提供理论基础。

关键词: 流变特性, 蛋白含量, 功能特性, 常温贮藏

Abstract:

In order to explore the effect of storage at room temperature on rheological properties and proteins components of egg albumin, the main proteins contents and rheological properties of egg albumin were measured when the egg was stored at 25 ℃ for 28 d. The results showed that with the prolonged storage time, the content of ovomucin decreased significantly (P<0.05), while the content of S-ovalbumin increased significantly (P<0.05), reaching (92.99±0.81)% at 28 d. Lysozyme content showed a significant (P<0.05) trend of first increasing and then decreasing, yet its activity exhibited decreasing tendency. With the change of proteins contents, the foaming and emulsifying properties of egg albumin significantly (P<0.05) increased first and then decreased, while the foam stability and emulsion stability decreased significantly (P<0.05). The thermal denaturation temperature and enthalpy value of the egg albumin increased gradually during the storage. In the early stage of storage, the apparent viscosity of the egg albumin increased, and the energy storage modulus value (G') was higher than energy consumption modulus value (G″), which showed the elastic properties of the fluid. In the late stage of storage, the apparent viscosity decreased, and the G' was smaller than G″, which showed the characteristics of viscosity. These findings provided a theoretical basis for further research on the thinning of egg albumin.

Key words: rheological properties, protein content, functional properties, storage at room temperature

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