Interactions in l-alanine-/l-proline-/l-valine-/l-leucine-aqueous KCl/KNO3 systems at different temperatures: An isentropic compressibility study

Riyazuddeen, Imran Khan

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Ultrasonic velocity and density values of amino acids: l-alanine/l-proline/l-valine/l-leucine in 2.0 M aqueous KCl and 2.0 M aqueous KNO3 solutions have been measured for several concentrations of amino acids at different temperatures: 298.15, 303.15, 308.15, 313.15, 318.15 and 323.15 K. Using ultrasonic velocity and density data, the thermodynamic parameters such as isentropic compressibility (κs), change in isentropic compressibility (Δκs) and relative change (Δκs0) in isentropic compressibility have been computed. The trends in the behaviour of κs, Δκs and Δκs0 with changes in the concentration of amino acids/zwitterions as well as in temperature have been discussed in terms of zwitterions-ions, zwitterions-water dipoles, ions-ions, ions-water dipoles intermolecular/interionic interactions operative in the said systems.

Original languageEnglish
Pages (from-to)45-48
Number of pages4
JournalThermochimica Acta
Volume483
Issue number1-2
DOIs
Publication statusPublished - Feb 10 2009

Fingerprint

leucine
Valine
alanine
Compressibility
Proline
Leucine
Alanine
zwitterions
compressibility
Ions
amino acids
Amino acids
Ultrasonic velocity
Amino Acids
Density (specific gravity)
ions
ultrasonics
interactions
dipoles
Temperature

Keywords

  • Amino acid
  • Isentropic compressibility
  • KCl
  • KNO
  • Zwitterions-ions interactions

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Condensed Matter Physics
  • Instrumentation

Cite this

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abstract = "Ultrasonic velocity and density values of amino acids: l-alanine/l-proline/l-valine/l-leucine in 2.0 M aqueous KCl and 2.0 M aqueous KNO3 solutions have been measured for several concentrations of amino acids at different temperatures: 298.15, 303.15, 308.15, 313.15, 318.15 and 323.15 K. Using ultrasonic velocity and density data, the thermodynamic parameters such as isentropic compressibility (κs), change in isentropic compressibility (Δκs) and relative change (Δκs/κ0) in isentropic compressibility have been computed. The trends in the behaviour of κs, Δκs and Δκs/κ0 with changes in the concentration of amino acids/zwitterions as well as in temperature have been discussed in terms of zwitterions-ions, zwitterions-water dipoles, ions-ions, ions-water dipoles intermolecular/interionic interactions operative in the said systems.",
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AU - Khan, Imran

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N2 - Ultrasonic velocity and density values of amino acids: l-alanine/l-proline/l-valine/l-leucine in 2.0 M aqueous KCl and 2.0 M aqueous KNO3 solutions have been measured for several concentrations of amino acids at different temperatures: 298.15, 303.15, 308.15, 313.15, 318.15 and 323.15 K. Using ultrasonic velocity and density data, the thermodynamic parameters such as isentropic compressibility (κs), change in isentropic compressibility (Δκs) and relative change (Δκs/κ0) in isentropic compressibility have been computed. The trends in the behaviour of κs, Δκs and Δκs/κ0 with changes in the concentration of amino acids/zwitterions as well as in temperature have been discussed in terms of zwitterions-ions, zwitterions-water dipoles, ions-ions, ions-water dipoles intermolecular/interionic interactions operative in the said systems.

AB - Ultrasonic velocity and density values of amino acids: l-alanine/l-proline/l-valine/l-leucine in 2.0 M aqueous KCl and 2.0 M aqueous KNO3 solutions have been measured for several concentrations of amino acids at different temperatures: 298.15, 303.15, 308.15, 313.15, 318.15 and 323.15 K. Using ultrasonic velocity and density data, the thermodynamic parameters such as isentropic compressibility (κs), change in isentropic compressibility (Δκs) and relative change (Δκs/κ0) in isentropic compressibility have been computed. The trends in the behaviour of κs, Δκs and Δκs/κ0 with changes in the concentration of amino acids/zwitterions as well as in temperature have been discussed in terms of zwitterions-ions, zwitterions-water dipoles, ions-ions, ions-water dipoles intermolecular/interionic interactions operative in the said systems.

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