Studies on the aqueous solutions of guanidinium salts. IX. Activity coefficients of biguanide hydrochloride and sucrose in aqueous ternary solutions at 25.DEG.C.
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概要
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Activity coefficients for the ternary system biguanide·HCl–sucrose–water were determined by the isopiestic vapor pressure method at 25 °C. Biguanide hydrochloride (Bg·HCl) and sucrose each decreased the activity coefficient of the other solute, showing a mutual salting-in effect. The excess free energy of mixing was negative and its magnitude was about twice as large as that of the system urea–sucrose–water. The pair interaction parameter {Bg·HCl–sucrose}<SUB>g</SUB> was calculated to be −89.2 (cal mol<SUP>−2</SUP> kg). Thermodynamic properties of this system were found to be similar to those of the system urea–sucrose–water, indicating that Bg·HCl exerted a structure breaking effect on the aqueous solutions of sucrose as urea did.
- 公益社団法人 日本化学会の論文
著者
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Miyajima Koichiro
Faculty Of Pharmaceutical Science Kyoto University
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Nakagaki Masayuki
Faculty of Living Science Osaka City University
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Nakanishi Shigeo
Faculty of Pharmaceutical Sciences, Kyoto University
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