Limiting partial molar volumes of glycine, l-alanine, and l-serine in ethylene glycol + water mixtures at 298.15 K
Limiting partial molar volumes of glycine, l-alanine, and l-serine in ethylene glycol + water mixtures at 298.15 K
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DOI：
10.1021/je000216g
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发表时间：
2001-02
影响因子：
--
通讯作者：
Qingwang Liu;Xin-gen Hu;Rui-sen Lin;Wen-qiang Sang;Shu-qin Li
中科院分区：
文献类型：
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作者：
Qingwang Liu;Xin-gen Hu;Rui-sen Lin;Wen-qiang Sang;Shu-qin Li
本文用密度计测量了甘氨酸、L-丙氨酸和L-丝氨酸在乙二醇质量分数为0 ~ 0.50的乙二醇水溶液中的密度。从实验数据，表观摩尔体积和极限偏摩尔体积的混合物中的每种氨基酸已计算。用共球重叠模型解释了输送量的变化趋势。它的结论是，乙二醇在水中的存在下，降低了由氨基酸引起的电致伸缩的程度。还讨论了取代基效应。
Densities of solutions of glycine, l-alanine, and l-serine have been measured respectively with an oscillating-tube densimeter at 298.15 K in ethylene glycol + water mixtures with mass fractions of ethylene glycol ranging from 0 to 0.50. From the experimental data, apparent molar volumes and limiting partial molar volumes of each amino acid in the mixtures have been calculated. The trends of transfer volumes are interpreted by the cosphere overlap model. It is concluded that the presence of ethylene glycol in water decreases the extent of electrostriction caused by the amino acid. Substituent effects are also discussed.