利用 LKB2 2 77生物活性检测仪对 2 98.15K时 L-丝氨酸在水 / DMF混合溶剂 (浓度范围为 5%～ 4 5% ,以 10 %递增 )中的稀释焓进行了测量 ,结果表明 L-丝氨酸在各种溶液中的相对偏摩尔焓与质量摩尔浓度近似成线性关系 .在水 / DMF混合溶剂中 ,焓对相互作用系数为负值 ,且随 DMF含量的增加而减小 . The LKB2 2 77 bioactivity detector was used to measure the enthalpy of dilution of L-serine at 98.15 K in a water / DMF mixed solvent (5% -45% in 10% increments). The results showed that L- The relative partial molar enthalpies of serine in various solutions are approximately linear with the mass molar concentration, and the enthalpy to water interaction coefficient is negative in water / DMF mixed solvents and decreases with the increase of DMF content.