The apparent molal volumes and adiabatic compressibilities of aqueous amino acids at 25°C

Frank J Millero, Antonio L. Surdo, Charles Shin

Research output: Contribution to journalArticle

529 Citations (Scopus)

Abstract

The apparent molal volumes and adiabatic compressibilities of 15 amino acids in water have been determined at 25°C from precise density and sound measurements. The electrostriction partial molal volume and compressibility of the amino acids were determined from V̄0(meas) - V̄0(int) and K̄0(meas) - K̄0(int). The values of V̄0(int) have been estimated from V̄0 of the uncharged amide isomers and V̄0cryst, the crystal molal volume. Both V̄0(elect) and K̄0(elect) yield values of 4.1 ± 0.4 for the number of water molecules hydrated to the amino acids. Group contributions for the partial molal volume and adiabatic compressibilities have been determined from the amino acids. The volume results are in good agreement with the values calculated by other workers on soluble organic solutes.

Original languageEnglish (US)
Pages (from-to)784-792
Number of pages9
JournalJournal of Physical Chemistry
Volume82
Issue number7
StatePublished - 1978

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Compressibility
compressibility
amino acids
Amino acids
Amino Acids
Electrostriction
Acoustic variables measurement
Water
electrostriction
Amides
Isomers
acoustic measurement
water
amides
solutes
isomers
Crystals
Molecules
crystals
molecules

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

The apparent molal volumes and adiabatic compressibilities of aqueous amino acids at 25°C. / Millero, Frank J; Surdo, Antonio L.; Shin, Charles.

In: Journal of Physical Chemistry, Vol. 82, No. 7, 1978, p. 784-792.

Research output: Contribution to journalArticle

Millero, Frank J ; Surdo, Antonio L. ; Shin, Charles. / The apparent molal volumes and adiabatic compressibilities of aqueous amino acids at 25°C. In: Journal of Physical Chemistry. 1978 ; Vol. 82, No. 7. pp. 784-792.
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