木质化鸡胸肉发生率统计及其肉糜功能特性研究
The incidence of wooden chicken breast and the functional properties in its meat batter
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摘要: 本研究对肉鸡屠宰企业日常生产过程中的木质化鸡胸肉发生率进行统计,并测定其品质指标及肉糜凝胶的保水性、质构特性,比较其与正常肉凝胶微观结构及蛋白质二级结构含量差异。实验测得木质化鸡胸肉发生率为18.33%。与正常肉相比,木质化鸡胸肉宰后24 h的p H显著升高(p<0.05),但L*值无显著差异(p>0.05)。与正常肉肉糜相比,木质化鸡肉肉糜蒸煮得率低,离心损失大,肉糜凝胶质构指标降低(p<0.05)。微观结构显示,木质化鸡胸肉凝胶结构中空隙较多且形成大量聚集状凝胶基质。与正常肉凝胶相比,木质化鸡肉凝胶α-螺旋含量显著升高,β-折叠与β-转角含量显著降低(p<0.05)。结果表明,木质化鸡胸肉在肉鸡屠宰加工企业日常生产过程中发生率较高,且降低鸡肉功能特性。Abstract: In this study, the incidence of wooden chicken breast in the daily production process of broiler slaughtering enterprises was analyzed.The quality properties of raw wooden chicken breast and the water holding capacity, textural properties were measured, microstructure and content of protein secondary structure of meat gel were measured.The p H and L*value of chicken breast at 24 h postmortem were measured.Compared with normal chicken breast, the wooden chicken breast had higher p H value ( p < 0.05) , but the L*value had no significant difference ( p > 0.05) . The results showed that the incidence rate of wooden chicken breast was 18.33%. Compared with normal meat batter, wooden chicken breast batter hadlower cooking yield and higher centrifugal loss, lower textual indexes ( p < 0.05) .Microstructure of meat gels showed that there were many large gel matrixes in the wooden chicken breast gel structure.Compared to normal meat gel, the α-helix content of wooden chicken breast gel significantly increased and the β-sheet and β-turn contents significantly decreased ( p < 0.05) . The results showed that wooden chicken breast had a higher incidence in the daily production process of broiler slaughtering and processing enterprises, and impacted the functional properties of chicken meat.