[关键词]
[摘要]
以罗非鱼下脚料为原料,采用pH-stat法控制酶解,制备5.0%的罗非鱼下脚料酶解蛋白。采用截留分子量为5 kDa的超滤膜对罗非鱼下脚料胰蛋白酶水解产物(DH 5.0%)进行超滤。结果显示:蛋白回收率为89.21%,脱盐率为87.59%,乳化活性提高1.2倍,乳化稳定性提高1.1倍;发泡性略有提高。
[Key word]
[Abstract]
Hydrolyzed Tilapia by-products proteins were prepared and the degree of hydrolysis was controlled as 5.0% by pH-stat method in this study. Trypsin-hydrolysates (DH 5.0%) were ultrafiltered by 5 kDa ultrafiltration membrane. The results showed that the protein recovery was 89.21% and the desalination rate reached 87.59% after ultrafiltration. Emulsifying activity increased by 1.2 times and emulsion stability increased by 1.1 times after ultrafitration. Foaming properties was also improved by ultrafiltration treatment.
[中图分类号]
[基金项目]
广东省科技计划项目(2011A020102005);粤港关键领域重点突破项目(2009498D21)