The volume, adiabatic compressibility, and viscosity of amino acids in aqueous alkali-chloride solutions.
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概要
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The apparent molal volumes (φ<SUB>V</SUB>), apparent molal adiabatic compressibilities (φ<SUB>KS</SUB>), and relative viscosities (<I>n</I><SUB>r</SUB>) at 25 °C have been obtained for the following amino acids in aqueous alkali-chloride solutions from measurements of the density, the ultrasonic velocity, and the flow time: glycine, L-alanine, β-alanine, α-aminoisobutyric acid, L-serine, and L-threonine. Viscosity measurements were also carried out in water for reference. The alkali chlorides used were lithium, sodium, and potassium chlorides. The limiting values φ<SUB>V</SUB><SUP>o</SUP>, φ<SUB>KS</SUB><SUP>o</SUP> and the extended Jones-Dole viscosity coefficients, <I>B</I> and <I>D</I>, were calculated by a linear extrapolation using the least-squares method. All the φ<SUB>V</SUB><SUP>o</SUP>, φ<SUB>KS</SUB><SUP>o</SUP>, and <I>B</I> values obtained in the mixed solvents were larger than the corresponding ones in water, except in a few cases of the <I>B</I> coefficient. The results are discussed in terms of the dehydration effect of the electrolytes upon the amino acids.
- 公益社団法人 日本化学会の論文
著者
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Ogawa Toshio
Department of Chemistry, College of General Education, Nagoya University
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Mizutani Kiyoshi
Department of Chemistry, College of General Education, Nagoya University
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Yasuda Motoo
Department of Chemistry, College of General Education, Nagoya University
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