亲水胶体对未漂洗革胡子鲶鱼鱼糜凝胶特性的影响

Effects of Hydrophilic Colloid on Gel Properties of Unrinsed Catfish(Clarias gariepinus)Surimi

为比较亲水胶体对未漂洗的革胡子鲶鱼鱼糜凝胶特性的影响,分别将0.2%结冷胶(GNG)、0.2%卡拉胶(CGN)、0.2%可得然胶(CDG)及0.2%瓜尔豆胶(GRG)添加于未漂洗的革胡子鲶鱼鱼糜中,并测定凝胶特性、白度值、持水力、动态流变学性质和水分迁移变化规律等指标。结果表明,4种亲水胶体的添加均可不同程度地提高革胡子鲶鱼鱼糜凝胶的持水性、白度值、储能模量G′和损耗模量G″,GNG、CGN和CDG的添加有利于促进革胡子鲶鱼鱼糜凝胶中不易流动水向结合水方向迁移(P21增加),其中CDG组的持水性(95.77%)、破断力(500.80 g)、破断距离(8.46 mm)和凝胶强度(4335.69 g·mm)均为各处理中最大值,而添加GNG和GRG却会降低革胡子鲶鱼鱼糜的凝胶强度。综上所述,添加0.2%CDG可显著提高革胡子鲶鱼鱼糜的凝胶特性。

In order to compare the effect of hydrophilic colloid on gel properties of unrinsed Catfish(Clarias gariepinus)surimi,0.2%gellan gum(GNG),0.2%carrageenans(CGN),0.2%curdlan gum(CDG)and 0.2%guar gum(GRG)were added to unrinsed Catfish(Clarias gariepinus)surimi respectively,the indicators such as gel properties,whiteness value,water holding capacity,dynamic rheological properties and changes in water migration were measured.The results showed that the addition of four kinds of hydrophilic colloids could increase the water holding capacity,whiteness value,storage modulus G′and loss modulus G″of Catfish(Clarias gariepinus)surimi gel to varying degrees.The addition of GNG,CGN and CDG could promote the migration of immobile water to bound water in Catfish(Clarias gariepinus)surimi gel(P21 increased).The water holding capacity(95.77%),breaking force(500.80 g),breaking distance(8.46 mm)and gel strength(4335.69 g·mm)of CDG group were the maximum values,while GNG and GRG could reduce gel strength of Catfish(Clarias gariepinus)surimi.In summary,the addition of 0.2%CDG could significantly improve the gel properties of Catfish(Clarias gariepinus)surimi.