Densities of aqueous solutions containing model compounds of amino acids and ionic salts at T=298.15K

Venkatesu, P.; Lee, Ming‐Jer; Lin, Ho-mu

doi:10.1016/j.jct.2006.11.014

Cited by 27 publications

(13 citation statements)

References 28 publications

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“…Proteins are linear, large complex molecules; heterogeneous polymers are genetically mandated with 20 different naturally occurring amino acids in all living organisms, where residues are linked by covalent peptide bonds (-CO-NH-) [26][27][28]. In this context, ILs are found to be translating the protein functioning in therapeutic practice [1,2,23,24].…”

Section: Introductionmentioning

confidence: 99%

“…In this context, ILs are found to be translating the protein functioning in therapeutic practice [1,2,23,24]. Therefore, the thermodynamic contributions of amino acid from water to IL solutions provide information about solute-solvent interactions, which are important in understanding the stability of proteins' structure and function [21,26,27]. To have a better understanding of the effect of ILs on GPs and to reveal the molecular interactions between ILs and protein functional groups, more detailed thermodynamic studies are still needed.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ammonium based ionic liquids act as compatible solvents for glycine peptides

Vasantha

Attri

Venkatesu

et al. 2013

The Journal of Chemical Thermodynamics

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ammonium based ionic liquids act as compatible solvents for glycine peptides

Vasantha

Attri

Venkatesu

et al. 2013

The Journal of Chemical Thermodynamics

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“…A number of researchers have studied the partial molal volumes and partial molal isentropic compressibilities to investigate the interactions of amino acids with simple salts such as NH 4 Cl, NaCl, KCl, Na 2 SO 4 , KSCN, MgCl 2 , CaCl 2 [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27], which act as stabilizers/destabilizers. Khoshbarchi et al [28] have studied the φ o v and φ o k values of glycine in aqueous KCl and KNO 3 solutions.…”

Section: Introductionmentioning

confidence: 99%

Effect of KCl and KNO3 on Partial Molal Volumes and Partial Molal Compressibilities of Some Amino Acids at Different Temperatures

Riyazuddeen

Khan

2008

Int J Thermophys

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Density (ρ) and ultrasonic velocity (u) values of amino acids l-alanine, l-proline, l-valine, and l-leucine in 2 M aqueous KCl and 2 M aqueous KNO 3 solutions have been measured as a function of amino acid concentration at different temperatures (298.15 K, 303.15 K, 308.15 K, 313.15 K, 318.15 K, and 323.15 K). Using the ρ and u data, partial molal volume (φ o v ) and partial molal isentropic compressibility (φ o k ) values have been computed. The increase in partial molal volume with temperature has been attributed to the volume expansion of hydrated zwitterions. The φ o v and φ o k values of l-alanine, l-proline, l-valine, and l-leucine in 2 M aqueous KCl and KNO 3 solutions have been found to be larger than the corresponding values in water. The larger partial molal volumes of l-alanine, l-proline, l-valine, and l-leucine in 2 M aqueous KCl and KNO 3 solutions have been ascribed to the formation of 'zwitterion-K + /Cl − /NO 3 − ' and 'K + /Cl − /NO 3 − -water dipole' aggregates in solutions. The formation of these entities in solutions causes the release of water associated with zwitterions to the bulk water. The larger partial molal compressibilities of l-alanine-/l-proline-/l-valine-/l-leucine-2 M aqueous KCl/KNO 3 solutions than the corresponding values in water have been attributed to the formation of 'zwitterion-ion' and 'ion-water dipole' incompressible entities in solutions.

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“…It is beyond the scope of this article to give an extensive summary of these works. Recently, the densities of aqueous electrolyte solutions of potassium acetate, potassium bromide, and potassium chloride at fixed (1, 2, and 4) mol Á dm À3 have been measured by our research group [48] at T = 298.15 K.…”

Section: Resultsmentioning

confidence: 99%