α-氨基酸在己酸钠水溶液中的流动活化自由能  

Activation Free Energies for Viscous Flow of Some α-Amino Acids in Aqueous Sodium Caproate Solutions

作　　者：张用伟[1] 

机构地区：[1]河南工业大学化工职业学院,河南郑州450042

出　　处：《安阳师范学院学报》2008年第5期66-68,共3页Journal of Anyang Normal University

摘　　要：测定了298.15和308.15K时,甘氨酸、DL-α-丙氨酸、DL-α-氨基正丁酸、DL-缬氨酸和DL-亮氨酸在己酸钠水溶液中的粘度,计算了α-氨基酸在己酸钠水溶液中的粘度B系数,运用Feakins公式得到了氨基酸的流动活化自由能Δμ20≠,并计算了氨基酸两性端基(NH3+,COO-)和CH2基团对Δμ20≠的贡献。按照溶质-溶剂之间的相互作用对结果进行了讨论。Viscosities of glycine, DL - α - alanine, DL- a - amino - n - butyric acid, DL - valine and DL - leucine in aqueous sodium caproate solutions at 298.15 and 308.15K have been determined. The viscosity B- coefficients have been calculated. The corresponding activation free energies （△μ2^＋≠ ） for viscous flow have been evaluated with the help of groups of the amino ac the Feakins equation. The contributions of the charged end group （NH3^＋, COO^- ） and CH2 ids to △μ2^＋≠ have also been determined. The resuhs have been interpreted in the light of the solute- solvent interactions in .aqueous media.

关 键 词：流动活化自由能 Α-氨基酸 己酸钠水溶液 

分 类 号：O645.13[理学—物理化学]