摘要
三文鱼的质地(力学特性)是决定其食用价值的重要因素,常规的力学检测主要是利用质构仪进行质构剖面分析(textujre profile analysis,TPA)测试。为了验证动态力学测试仪(dynamic mehanical analysis,DMA)在三文鱼品质检测中的可行性,使用DMA动态应力扫描模式对生鲜三文鱼进行了应力松弛测试,并与TPA测试结果进行了相关性分析。结果表明:DMA测得的三文鱼应力松弛参数变化规律与三文鱼的品质变化规律一致,均随着贮藏时间的延长而不断减小,而且可用二阶Maxwell模型进行拟合(R^2>0.99);通过相关性分析发现,DMA测得的弹性模量以及主松弛时间分别与TPA测得的弹性指标和咀嚼性之间在0.01水平分别显著相关。表明DMA可用于三文鱼品质的评估和货架期的预测,其中,弹性模量E_0、E_1和主松弛时间最为重要。
Texture is an important index in quality assessment of salmon products. The conventional mechanical testing is Texture Profile Analysis（ TPA）. In order to verify weather Dynamic Mechanical Analysis（ DMA） is also feasible for determining the quality of salmon fillets,stress relaxation curve was drew by DMA,and non-linear fitting equations based on Maxwell model was compared with the tests of TPA. The results showed that the stress relaxation modulus of salmon fillets were very similar with real salmon quality： it decreased during the storage period,and fit with Second-order Maxwell model（ R^2 0. 99）. The correlation analysis showed that resilience and elastic modulus（ E_0） 、springiness and elastic modulus（ E_1） 、stress relaxation time and chewing during storage are all significantly correlated. Therefore,DMA can be used for quality assessment and shelf-life prediction of salmon fillets. The elastic modulus（ E_0、E_1） and the main relaxation time are more important factors.
出处
《食品与发酵工业》
CAS
CSCD
北大核心
2016年第3期212-216,共5页
Food and Fermentation Industries
基金
中国博士后科学基金面上项目(2014M561491)
国家科技支撑计划(2013BAD19B00)资助
