Activity coefficients for the system water-α-amino-n-butyric acid-urea by

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Isopiestic vapor pressure measurements at 25° are reported for the system water-α-aminon-butyric acid-urea. The concentration varied from 0 to 2 m for the amino acid and from 0 to 9 m for urea. The results for dilute solutions are discussed in terms of a model which includes hydrophobic bonding of the amino acid, dimerization of urea, and the effect of urea on the acid dimerization. A method for obtaining a series expression for the water activity assuming an arbitrary model is summarized.

Original languageEnglish (US)
Pages (from-to)901-905
Number of pages5
JournalJournal of physical chemistry
Issue number4
StatePublished - 1967
Externally publishedYes


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