食品科学 ›› 2018, Vol. 39 ›› Issue (11): 89-94.doi: 10.7506/spkx1002-6630-201811014

• 食品工程 • 上一篇    下一篇

超高压对鸡肉肌原纤维蛋白-MgCl2凝胶特性的影响

潘 杰,周 颖,王 昱,代显卓,李沛军,陈从贵*   

  1. 合肥工业大学食品科学与工程学院,安徽 合肥 230009
  • 出版日期:2018-06-15 发布日期:2018-06-06
  • 基金资助:
    国家自然科学基金面上项目(31271893);安徽省家禽产业技术体系项目(AHCYJSTX-06)

Effect of High Pressure Processing on Gel Properties of ChickenB reast Myofibrillar Protein Containing Magnesium Chloride

PAN Jie, ZHOU Ying, WANG Yu, DAI Xianzhuo, LI Peijun, CHEN Conggui*   

  1. School of Food Science and Engineering, Hefei University of Technology, Hefei 230009, China
  • Online:2018-06-15 Published:2018-06-06

摘要: 在低盐条件下(2.3% NaCl),以含有质量分数0.3% MgCl2的鸡肉肌原纤维蛋白(myofibrillar protein, MP)混合体系(MP-MgCl2)为研究对象,室温下(20~25 ℃)考察超高压处理(high pressure processing, HPP)(100~400 MPa,10 min)对混合体系凝胶硬度和保水性(water holding capacity,WHC)的影响, 并通过对该混合体系流变特性、横向弛豫时间及凝胶微结构分析,探讨其凝胶特性的变化机制。结果表明: 100~400 MPa的HPP可显著提高凝胶的硬度和WHC(P<0.05),且300 MPa是改善其凝胶硬度的合适压力;HPP 通过增加MP-MgCl2混合体系的储能模量(G’),缩短自旋-自旋弛豫时间T22和T23,促进凝胶形成交联、密实的多孔 网络结构,进而改善混合体系凝胶的特性。

关键词: 超高压, 肌原纤维蛋白, 氯化镁, 凝胶特性

Abstract: This research aimed to investigate the effect of high pressure processing (HPP) (at 100–400 MPa and 20–25 ℃ for 10 min) on the hardness and water-holding capacity (WHC) of chicken breast myofibrillar protein (MP) gel with 0.3% (m/m) magnesium chloride under low salt (2.3% NaCl) condition. The underlying mechanism was explored by rheological analysis, transverse relaxation time determination and microstructure observation. The results showed that the gel hardness and WHC were significantly (P < 0.05) increased with elevated pressure levels, and the appropriate pressure was 300 MPa. HPP could promote the formation of compact, porous and cross-linking gel network structures and consequently improve gel properties of chicken breast myofibrillar protein by increasing the storage modulus (G’) and shortening the water relaxation time (T22 and T23).

Key words: high pressure processing, myofibrillar protein, magnesium chloride, gel properties

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