中文摘要：

通过紫外-可见光谱法研究了酪氨酸（Tyr）与铒（Er，Ⅲ）的相互作用，结果表明： Er（Ⅲ）与Tyr可形成1∶3的配合物，该配合物的摩尔吸光系数为ε=6.19×104 L·（mol·cm）^-1； 且研究了Er（Ⅲ）（Tyr）3与鲱鱼精DNA的相互作用，结果显示二者的作用摩尔比为2∶1，荧光探针法、黏度法和熔点法表明二者之间存在嵌插结合，Scatchard法表明二者之间既存在嵌插结合, 又有一定的沟渠作用，圆二色法结果显示Er（Ⅲ）（Tyr）3可使DNA构像转变。

英文摘要：

The UV-Vis spectroscopy was used to study the interaction of tyrosine （Tyr） with the erbium （Er,IU ）. The results showed that the Er （Ⅲ） and Tyr could form a complex with the molar ratio of 1 ： 3, and its molar absorptivity was ε=6.19×104 L·（mol·cm）^-1 In addition, the interaction between Er（ Ⅲ ） （Tyr） 3 and DNA was studies. The results were as follows： they interacted with the molar ratio of 2： 1, and the fluorescence probe method, the viscosity method and the melting point method showed that the intercalation effects existed. The scatchard method also showed a weak groove effects, the circular dichroism method revealed that Er （ Ⅲ ） （Tyr）3 could made the change of conformation of DNA