摘要:
为了给冰温贮藏(-1±0.6)℃羊肉宰后僵直成熟进程评价提供一种快速、操作简单、无化学危害的方法,研究了宰后羊肉冰温贮藏过程(宰后0.3~9 d)电阻抗变化规律,并基于模糊数学建立了冰温贮藏羊肉僵直成熟进程评价的方法。试验结果表明,冰温贮藏过程羊肉的细胞内阻(Ri)和细胞外阻(Re)呈先增加后降低的变化趋势,细胞膜电容(Cm)、介电损耗正切角(tanδ)、极化系数(k)均呈逐渐下降的变化趋势,羊肉在宰后不同僵直成熟过程Cm、Ri、Re、tanδ、k五种电阻抗参数差异极显著(P<0.01)。使用超标倍数和变异系数两种权重模糊评价方法对羊肉僵直成熟进程进行了评价,构建了成熟进程评价数学模型,经验证两种模型均能准确预测羊肉僵直和成熟进程。结果表明,肌肉电阻抗测量结合模糊综合评价是一种有效的监测冰温贮藏羊肉僵直成熟进程新方法。
关键词:
-
羊肉
/
-
电阻抗
/
-
冰温
/
-
模糊综合评价
Abstract:
The rigor and aging process of mutton stored at ice-temperature(-1±0.6)℃ were increased. The traditional methods used to evaluate rigor and aging process of mutton were slow,time-consuming,and harmful to human health by using chemicals. Therefore,establishing a new method for evaluating rigor and aging process of mutton stored at ice-temperature with simple operation,low cost and no chemical hazard,which could present the theoretical and data support of evaluating aging process of mutton for industrial production on line.Electrical impedance properties of mutton based on fuzzy mathematics were studied form 0.3 to 9 day after slaughter. The results showed that intracellular resistance(Ri)and extracellular resistance(Re)increased firstly then decreased greatly,and then decreased slightly as the storage time continued. The cytomembrane capacitive(Cm),tangent of dielectric loss(tan δ)and polarization coeffecient(k)exhibited a decreased trend throughout the ripening time. Analysis of variance showed rigor and aging process had significant influence on the electrical impedance properties(Ri,Re,Cm,tan δ,k)(P<0.01).Two kinds of mathematical model(over standard with weight,coefficient of variation)used to evaluate rigor and aging process of mutton was founded by utilizing the electrical impedance index and fuzzy comprehensive evaluation. Two kinds of model can accurately evaluate rigor and aging process by validation.These results proved that electrical impedance properties measurement combined with fuzzy matrix model was a new way for assessing rigor and aging process of mutton stored at ice-temperature.