Partial molar volumes and adiabatic compressibilities ofN-acetyl-DL-serinamide andN-acetyl-L-threonmamide in dilute aqueous solutions
Tóm tắt
Densities and sound velocities in dilute aqueous solutions ofN-acetyl-DL-serinamide andN-acetyl-L-threoninamide were measured at 5, 15, 25, 35, and 45°C. Partial molar volumes and partial molar adiabatic compressibilities of these amino acid derivatives at infinite dilution were determined. The partial molar quantities for the parent amino acids, serine and threonine, were also determined and compared with the acetyl amide derivatives. The contribution of the side chain of theN-acetyl amino acid amide or amino acid to the partial molar quantities were estimated from the difference between the partial molar quantities for the solute studied and those for the corresponding species,N-acetyl-glycinamide or glycine, without the side chain.
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