研究了不同稀土浓度的镧、钕柠檬酸配合物溶液对纤维素酶水解不同纤维素底物的活性的影响规律,并对其作用机制进行了分析. 用沉淀法分别合成了镧、钕柠檬酸配合物;用EDTA络合滴定法分析了镧、钕在配合物中的含量;用红外光谱法对镧、钕柠檬酸配合物进行了表征;用DNS试剂法测定了不同稀土浓度的镧、钕柠檬酸配合物溶液对纤维素酶水解不同纤维素底物的酶活性. 结果表明: 柠檬酸中羧基脱去质子后与镧、钕离子配位,在合适浓度时,两个配合物对纤维素酶水解滤纸、羧甲基纤维素钠、纤维二糖的活性均有最大的激活作用,钕配合物的激活效果好于镧配合物.
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