锤打工艺对牛肉糜凝胶特性影响的机理
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孙路,男,福建农林大学在读硕士研究生

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广东省现代农业产业技术体系创新团队(编号:2019KJ114);广东省科技计划项目(编号:2017A040405036)


Effect of hammering process on gel properties of beef gel
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    摘要:

    以不同捶打时间为参照、打浆工艺为对照,通过测定流变特性、蒸煮损失率、质构特性、盐溶性蛋白质含量、蛋白质氧化程度等指标,分析牛肉糜凝胶品质差异,阐明锤打对牛肉糜凝胶特性的影响。结果表明,捶打可使肉糜在动态频率变化过程中有更小的相位角(tanδ),在升温过程中拥有更高的储能模量(G');锤打时间越长的肉糜在动态频率变化过程中G'相对更低,tanδ相对更大;升温过程中G'在55~75 ℃迅速上升,降温过程中除60 min的样品外,G'升高趋势明显。随着捶打时间的延长,盐溶性蛋白质含量增加,蛋白质氧化程度增加,凝胶的蒸煮损失率先下降后上升,凝胶的硬度和咀嚼性先下降后上升,弹性先上升后下降,内聚性与回复性不断下降。相关性分析表明,蛋白质氧化程度与凝胶硬度呈显著负相关,与其他指标无显著相关性。捶打30 min以内可提高凝胶品质,捶打超过30 min对凝胶特性产生不利影响;一定时间内的捶打能增加盐溶性蛋白质含量,改善肉糜流变特性、质构特性。

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    Based on different hammering time, contrasted with the beating sample, the effects of hammering on the quality of beef gel were analyzed by measuring rheological properties, cooking loss rate, texture properties, salt soluble protein content, protein oxidation. In the process of dynamic frequency change, the hammering sample had a smaller phase angle (tanδ) than the beating sample; In the process of heating up, the hammering sample had higher storage modulus (G') than the beating sample; In the process of dynamic frequency change, the longer the hammering time was, the lower the G' and the bigger tanδ was, and rised rapidly at 55~75 ℃ during the heating process. G' gradually rised during the cooling process except for the sample of hammering 60 min. As the hammering time of the beef batter was prolonged, the salt soluble protein content increased, protein oxidation increased, the cooking loss rate of gel reduced first and then increased; the hardness and chewiness of gel reduced firstly and then increased, the springiness of gel increased firstly and then reduced, and the cohesiveness and recovery of gel were reduced. The correlation analysis showed that the degree of protein oxidation was negatively correlated with the gel hardness, but not with other indexes. The quality of gel will be improved as hammering time in 30 mins, and hammering for more than 30 mins would have an adverse effect on the gel properties. In a certain time, hammering process can increase the content of salt soluble protein, improve the rheological properties and texture properties of gel, this conclusion means the traditional hammering process has certain rationality and theoretical basis.

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孙路,黄群,唐道邦,等.锤打工艺对牛肉糜凝胶特性影响的机理[J].食品与机械,2020,(6):23-27,49.
SUN Lu, HUANG Qun, TANG Dao-bang, et al. Effect of hammering process on gel properties of beef gel[J]. Food & Machinery,2020,(6):23-27,49.

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  • 在线发布日期: 2023-02-17
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