Interactions of some α-amino acids with tetra-n-alkylammonium bromides in aqueous medium at different temperatures

Ali, Anwar; Khan, Sarah; Hyder, S.; Tariq, Mohammad

doi:10.1016/j.jct.2006.08.010

Cited by 74 publications

(37 citation statements)

References 22 publications

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“…Moreover, the study of these interactions can give valuable information about various biochemical processes such as protein hydration, aggregation, and denaturation. In recent years, a number of workers have determined the various thermodynamic properties of these model compounds in aqueous solutions containing simple electrolytes having smaller cations of hydrophilic nature [6][7][8][9][10][11][12][13][14][15][16][17][18][19] but very few studies have been done in aqueous saccharide solutions [3,[20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Volumetric behaviour of amino acids and their group contributions in aqueous lactose solutions at different temperatures

Pal

Chauhan

2011

The Journal of Chemical Thermodynamics

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Section: Introductionmentioning

confidence: 99%

Volumetric behaviour of amino acids and their group contributions in aqueous lactose solutions at different temperatures

Pal

Chauhan

2011

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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“…Ali et al [109] studied a number of thermodynamic parameters viz. apparent molar volumes, ϕ v , partial molar volumes, ϕ 0 v , transfer volumes, ϕ 0 v;trans , Falkenhagen coefficients, A, Jones-Dole coefficients, B, free energies per mole of solute, Δμ 0≠ 1 , and per mole of solvent, Δμ 0≠ 2 , molar refraction, R D , and limiting molar conductivity, Λ 0 m , by using the experimental measured densities, ρ, viscosities, η, refractive indexes, n D , and specific conductivities, k, data of glycine (0.02-0.10 m) in 0.01 m aqueous SDS, CTAB and Tx-100 solutions at 298.15, 303.15, 308.15 and 313.15 K. The data from these parameters together with fluorescence were interpreted in terms of interactions prevailing in the system.…”

Section: Nonionic Surfactantsmentioning

confidence: 99%

Surfactant–Amino Acid and Surfactant–Surfactant Interactions in Aqueous Medium: a Review

Malik

2015

Appl Biochem Biotechnol

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An overview of surfactant-amino acid interactions mainly in aqueous medium has been discussed. Main emphasis has been on the solution thermodynamics and solute-solvent interactions. Almost all available data on the topic has been presented in a lucid and simple way. Conventional surfactants have been discussed as amphiphiles forming micelles and amino acids as additives and their effect on the various physicochemical properties of these conventional surfactants. Surfactant-surfactant interactions in aqueous medium, various mixed surfactant models, are also highlighted to assess their interactions in aqueous medium. Finally, their applied part has been taken into consideration to interpret their possible uses.

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Interactions of some α-amino acids with tetra-n-alkylammonium bromides in aqueous medium at different temperatures

Cited by 74 publications

References 22 publications

Volumetric behaviour of amino acids and their group contributions in aqueous lactose solutions at different temperatures

Volumetric behaviour of amino acids and their group contributions in aqueous lactose solutions at different temperatures

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

Surfactant–Amino Acid and Surfactant–Surfactant Interactions in Aqueous Medium: a Review

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