直鎖α-アミノ酸の溶液の性質
粘性B係数, 溶解熱, 及び表面張力
1988 年 37 巻 6 号 p. 437-440
詳細
1988 年 37 巻 6 号 p. 437-440
The viscosity B coefficients, heats of solution and surface activity of straigt chain α-amino acids H (CH2) n-1CH (NH2) COOH (Cn, n=15) in water were measured. The viscosity B coefficient of C1, increased with temperature, while those of C2 and higher homologs decreased with increase in temperature. Changes in heat capacity for dissolution in water, ΔC0p, as calculated from heats of solution at 15, 25, and 35°C, were negative for C1, white ΔC0p values for C2 and higher homologs were positive. C1, and C2 raised the surface tension of water, while C3 and higher homologs reduced it. Based on these results, structural changes in water as solvent with dissolution of α-amino acids and the effects of hydrophobicity of α-amino acids on surface active properties are discussed.
