| 水溶液中L-胱氨酸与氯化钠相互作用的热力学参数 |
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| 引用本文： | 李大成,张兆敏,王勇,李西元,毛红羽. 水溶液中L-胱氨酸与氯化钠相互作用的热力学参数[J]. 聊城大学学报(自然科学版), 1997, 0(3) |
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| 作者姓名： | 李大成 张兆敏 王勇 李西元 毛红羽 |
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| 作者单位： | 山东教育学院，安丘实验中学，聊城地区水利职工学校 |
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| 摘 要： | 在283．15～333．15K（间隔10K）下，用光度法测定了L－胱氨酸（L－Cystine）在纯水和NaCl水溶液中的溶解度．计算了NaCl-L－Cystine-H2O体系中L－Cys－tine的活度系数及盐效应常数ks，讨论了Nacl－L－Cystine相互作用的热力学参数，结果表明：ks＜0，gEN＜0，hEN＜0，sEN＜0．应用静电相互作用解释了这些参数及其随温度的变化规律．
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| 关 键 词： | 盐效应 热力学参数 对相互作用 静电作用 溶解度 L－胱氨酸 |
THERMODYNAMIC PARAMETERS OF INTERACTION OF L-CYSTINE WITHE NACL IN WATER |
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| Li Dacheng, Zhang Zhaomin. THERMODYNAMIC PARAMETERS OF INTERACTION OF L-CYSTINE WITHE NACL IN WATER[J]. JOURNAL OF LIAOCHENG UNIVERSITY (NATURAL SCIENCE, 1997, 0(3) |
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| Authors: | Li Dacheng Zhang Zhaomin |
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| Abstract: | Solubilities of L-Cystine in water and series of aqueou solutions of NaCl at 283. 15~333. 15K have been determined by spectrophotometry. The solubilities data were usedto calculate the activity coefficients for L-Cystine and the salting censtant ks for NaCl- L-Cystine -H2O system and thermodynamic parameters of pair interaction gEN, SENand hEN between NaCl and L-Cystine in water. It has been shown that k2<0,gEN<0,hEN<0 and SEN<0. The signs of these parameters and the temperature dependence ofthen have been interpreted by the electrostatic interaction. |
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| Keywords: | L-Cystine Salting effection Thermodynamic parameters Activity coefficient Pair interaction Electrostatic interaction |
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