CAJ | 학술논문

目的：比较一价金属离子和二价金属离子对鲢鱼糜凝胶力学性能的影响。方法向加入2.5%NaCl的鱼糜中添加不同浓度的KCl 、CaCl2、MgCl2(0、10、20、30、40、50 mmol/kg)、ZnCl2(0、0.02、0.04、0.06、0.08、0.10 mmol/kg)，研究金属离子对鱼糜凝胶穿刺和 TPA 性能的影响，并通过蠕变参数的变化研究金属离子与大分子的相互作用。结果10~30 mmol/kg一价金属离子盐KCl对鱼糜凝胶品质影响较小，二价金属离子盐(MgCl2、CaCl2、ZnCl2)能够显著提高鱼糜凝胶的破断强度、凹陷深度、松弛时间和黏流指数。综合持水性、白度和力学特性， MgCl2、CaCl2和ZnCl2的最适浓度分别为40~50 mmol/kg、20~30 mmol/kg和0.06~0.08 mmol/kg。结论二价金属离子(Mg2+、Ca2+、Zn2+)能够促进蛋白质伸展，并与蛋白质侧链-COOH形成“盐桥”，同时Ca2+还能激活内源性转谷氨酰胺酶(TGase)活性，促进ε-(γ-Glu)-Lys的形成，提高鱼糜凝胶力学性能，而一价金属离子K+会显著提高鱼糜凝胶的持水性。
목적：비교일개금속리자화이개금속리자대련어미응효역학성능적영향。방법향가입2.5%NaCl적어미중첨가불동농도적KCl 、CaCl2、MgCl2(0、10、20、30、40、50 mmol/kg)、ZnCl2(0、0.02、0.04、0.06、0.08、0.10 mmol/kg)，연구금속리자대어미응효천자화 TPA 성능적영향，병통과연변삼수적변화연구금속리자여대분자적상호작용。결과10~30 mmol/kg일개금속리자염KCl대어미응효품질영향교소，이개금속리자염(MgCl2、CaCl2、ZnCl2)능구현저제고어미응효적파단강도、요함심도、송이시간화점류지수。종합지수성、백도화역학특성， MgCl2、CaCl2화ZnCl2적최괄농도분별위40~50 mmol/kg、20~30 mmol/kg화0.06~0.08 mmol/kg。결론이개금속리자(Mg2+、Ca2+、Zn2+)능구촉진단백질신전，병여단백질측련-COOH형성“염교”，동시Ca2+환능격활내원성전곡안선알매(TGase)활성，촉진ε-(γ-Glu)-Lys적형성，제고어미응효역학성능，이일개금속리자K+회현저제고어미응효적지수성。
Objective In order to investigate effects of monovalent and divalent cations on surimi gels texture properties from silver carp. Methods Puncture and TPA properties of surimi gels added with KCl, CaCl2, MgCl2(0, 10, 20, 30, 40, and 50 mmol/kg), ZnCl2(0, 0.02, 0.04, 0.06, 0.08, and 0.10 mmol/kg)were studied. Creep test was also conducted to study the cross-linking between metal ions and macromolecule. Results 10~30 mmol/kg monovalent cation salt (KCl) had little effects on surimi gels. However, divalent cations salts (MgCl2, CaCl2, ZnCl2) could significantly increase breaking force, deformation, relaxation time and viscosity coefficient of surimi gels. Taking water-holding capacity, whiteness and texture properties into consideration, the optimal concentration of MgCl2, CaCl2 and ZnCl2 was 40~50 mmol/kg, 20~30 mmol/kg and 0.06~0.08 mmol/kg, respectively. Conclusion Divalent cations could increase texture properties of surimi gels by inducing protein unfolding and cross-linking via salt bridge. And Ca2+ could activate endogenous transglutaminase and catalyzed the formation of ε-(γ-Glu)-Lys. Monovalent significantly improved the water-holding capacity of surimi gels.