鱼肉组成及漂洗方法对蓝圆鲹鱼糜品质的影响

Effects of fish composition and washing methods on the quality of Decapterus maruadsi surimi

以蓝圆鲹为对象,研究普通肉、暗色肉和混合肉在盐水漂洗和碱盐水漂洗两种方法下,对鱼糜的pH、持水性、白度和质构特性的影响,确定3种鱼肉最适的漂洗方法,并在此基础上探讨3种鱼肉在最佳漂洗方法下的流变特性.结果表明:普通肉适合用0.2%盐水漂洗,暗色肉适合用0.4%碱盐水漂洗,混合肉适合用0.3%碱盐水漂洗;与盐水漂洗对比,碱盐水漂洗能显著提高蓝圆鲹鱼糜的白度,改善pH,降低鱼糜的持水性和质构特性(P<0.05).流变特性测试结果表明,普通肉鱼糜的品质要好于混合肉鱼糜,暗色肉鱼糜的品质最差.温度扫描结果显示,蓝圆鯵鱼糜形成过程经历3个阶段:第一阶段出现在46℃之前;第2阶段出现在46-52℃,为凝胶劣化阶段;第3阶段出现在52℃后,为凝胶形成阶段.

The effects of ordinary muscle, dark muscle, mixed muscle under different washing methods on pH, water holding capac- ity, whiteness, texture of Decapterus maruadsi surimi were investlgated, and the optimum washing methods to different fish composi- tion were confirmed, then the rheological properties were explored under the optimum washing conditions. The results described that the optimum washing methods were washing with 0.2% salt water to ordinary muscle, 0.4% alkali brine to clark muscle and 0.3% alkali brine to mixed muscle, and,comparlng with salt water, the alkali brine could enhance whiteness dramatically, improved pH value and lowered water holding capacity and texture of D. mantadsi surimiand. The rbeolngical properties showed that the quality of D. maruadsi surimi produced by ordinary muscle was better than mixed muscle, and dark muscle was the worst. The result of tem- perature scanning suggested the gel process of surimi had three stages ： the first stage appeared before 46 ℃, the second stage, the stage of modorl, appeared in 46 - 52 ℃, the third stage appeared after 52 ℃, and protein began to form the final gel.