5种淡水鱼鱼糜凝胶基本特性研究

Basic properties of surimi gel of five freshwater fish

  • 摘要: 文章以凝胶特性、肌原纤维蛋白化学键以及脂质、磷脂含量等为指标,研究了5种淡水鱼 黄颡鱼 (Pelteobagrus fulvidraco)、草鱼 (Ctenopharyngodon idellus)、鳙 (Aristichthys nobilis)、鲮 (Cirrhinus molitorella)、鲢 (Hypophthalmichthys molitrix) 鱼糜第一段和第二段加热的凝胶性能变化。结果显示,第一段加热鱼糜的凝胶强度、硬度、咀嚼性、白度、持水性显著小于第二段 (P<0.05),但凝胶弹性和内聚性差异不明显。表面疏水性均在第二段加热后显著增大,且增加程度差异显著 (P<0.05);对于二硫键,鳙和黄颡鱼两段加热的凝胶样品差异不显著 (P>0.05)。第二段加热凝胶的脂质质量分数介于38.24~76.45 g·kg−1,磷脂质量分数介于1.929~3.452 mg·g−1

     

    Abstract: To investigate the changes in the basic properties of surimi gel after the first and second heating stages, we studied the surimi gels of five kinds of freshwater fish (Pelteobagrus fulvidraco, Ctenopharyngodon idellus, Aristichthys nobilis, Cirrhinus molitorella, Hypophthalmichthys molitrix) by indices of gel properties, chemical bonds, lipid content, phospholipid content and so on. The results show that the gel strength, hardness, chewiness, whiteness and water holding capacity of the first heating surimi gel were significantly less than those of the second heating surimi gel (P<0.05), but there were no significant differences in the elasticity and cohesion. The surface hydrophobicity of the five kinds of fish surimi gels increased significantly after the second stage of heating, and the degree was significantly different (P<0.05). However, there was no significant difference in the disulfide bond content between the two heating stages of A. nobilis and P. fulvidraco (P>0.05). The lipid content of the second heating surimi gel ranged from 38.24 g·kg−1 to 76.45 g·kg−1, and the total phospholipid ranged from 1.929 mg·g−1 to 3.452 mg·g−1.

     

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