贮藏温度对方格星虫与革囊星虫质构、内源酶与水分变化的影响

为研究不同贮藏温度对方格星虫(SN)与革囊星虫(PE)质构、组织结构、内源蛋白酶活与水分特征变化的影响。本研究以鲜活SN与PE为原料,在4、30 ℃分别贮藏48、22 h,测定其质构特征、纤维结构、内源蛋白酶活、水分特性的变化。结果表明:在4 ℃贮藏0~16 h,30 ℃贮藏0~10 h,SN硬度、咀嚼性分别下降19.08%、33.94%和41.61%、41.39%,PE分别下降16.06%、12.62%和25.02%、17.68%,其他指标变化不明显;在4 ℃下贮藏16~24 h,30 ℃贮藏10~14 h,质构、内源蛋白酶活、水分活度、自由水与不易流动水占比发生显著变化(P<0.05),纤维弯曲,间隙增大。结论:在4 ℃下贮藏星虫各项指标变化程度皆小于30 ℃,4、30 ℃贮藏应分别控制在0~16 h,0~10 h。

Effects of Storage Temperatures on the Texture,Endogenous Protease and Water Changes of Sipunculus nudus and Phascolosoma esculenta

In order to study the effects of different storage temperatures on the texture, tissue structure, endogenous protease activity and water characteristics of Sipunculus nudus (SN) and Phascolosoma esculenta (PE), in this study, fresh SN and PE were used as raw materials and stored at 4 and 30℃ for 48 and 22 h, respectively. The texture characteristics, fiber structure, endogenous protease activity, and water characteristics were used as indicators. The results showed that:Storage at 4℃ for 0~16 h and 30℃ for~10 h, SN's hardness and chewiness decreased by 19.08%, 33.94% and 41.61%, 41.39% respectively, PE's hardness and chewiness decreased by 16.06%, 12.62% and 25.02%, 17.68%, respectively, while other indicators did not change significantly. By contrast, storage at 4℃ for 16~24 h and 30℃ for 10~14 h, texture size, endogenous protease activity, water activity, the proportion of free water and non-flowable water had a significant change (P<0.05), the fiber was bent, and the gap increased. Conclusion:The degree of changes in all indicators of the sipunculids during storage at 4℃ was less than 30℃.The storage at 4℃ and 30℃ should be controlled within 0~16 h and 0~10 h, respectively.