Apparent molar volumes and viscosity B-coefficients of some α-amino acids in aqueous solutions from 278.15 to 308.15K

Yan, Zhenning; Wang, Jianji; Liu, Wenbin; Lu, Jinsuo

doi:10.1016/s0040-6031(99)00107-0

Cited by 155 publications

(80 citation statements)

References 21 publications

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“…The partial molar expansions calculated in this work are in high accordance to those measured by Mota et al [1] and Martins et al [2]. The same approach was applied to the data published by Martins et al [2], Yan et al [10], Shen et al [11], and Banipal et al [12], for DL-alanine and Lark et al [7], for L-alanine, allowing the comparison in Fig. 1a.…”

Section: Resultssupporting

confidence: 85%

“…1a. A very good agreement is observed between the information found in the works by Martins et al [2], Lark et al [7], and Shen et al [11], but in conflict with the study published by Yan et al [10], that indicates an opposite change of the partial molar expansion with temperature. The same happens using the data published by Pal and Kumar [8,14], but with such different magnitude, that no information is presented in Fig.…”

Section: Resultssupporting

confidence: 44%

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Volumetric interactions of a series of α-amino acids in aqueous magnesium chloride solutions at 278.15, 288.15, 298.15, and 308.15 K

2015

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Section: Resultssupporting

confidence: 85%

Section: Resultssupporting

confidence: 44%

Volumetric interactions of a series of α-amino acids in aqueous magnesium chloride solutions at 278.15, 288.15, 298.15, and 308.15 K

2015

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“…The B values reflect the net structural effects of charged end groups and hydrophobic CH 2 groups of amino acids. These effects can be separated by observing the linear relationship of B-coefficients with the number of carbon atoms, n c in the amino acids [29,35,36]:…”

Section: Resultsmentioning

confidence: 99%

Volumetric, viscometric and refractive index behavior of some α-amino acids in aqueous tetrapropylammonium bromide at different temperatures

Ali

Shahjahan

2006

JICS

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Densities, ρ, viscosities, η, and refractive indices, n D , of glycine (Gly), DL-alanine (Ala), DL-valine (Val) (0.05, 0.10, 0.15, 0.20, 0.25 mol kg -1 ), and L-leucine (Leu) (0.02, 0.05, 0.10 mol kg -1 ) in water and in 0.20 mol kg -1 aqueous tetrapropylammonium bromide (TPAB) have been measured at 298.15, 303.15, 308.15, and 313.15 K. The density data have been utilized to calculate apparent molar volumes, φ v , partial molar volumes at infinite dilution, φ v°, and partial molar volumes of transfer, φ v°(tr) of amino acids. The viscosity data have been analyzed by means of Jones-Dole equation to obtain Falkenhagen coefficient, A, and JonesDole coefficient, B, free energy of activation of viscous flow per mole of solvent, Δμ 1°* , and solute, Δμ 2°* , and enthalpy, ΔH*, and entropy of activation , ΔS*, of viscous flow. The refractive index data have been used to calculate molar refractivity, R D, of amino acids in aqueous tetrapropylammonium bromide solutions. It has been observed that φ v°, B-coefficient and Δμ 2°* vary linearly with increasing number of carbon atoms in the alkyl chain of amino acids, and they were split to get contributions from the zwitterionic end groups (NH 3 + , COO -) and methylene group (CH 2 ) of the amino acids. The behavior of these parameters has been used to investigate the solute-solute and solute-solvent interactions as well as the effect of tetrapropylammonium cation (C 3 H 7 ) 4 N + on these interactions.

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“…where V • 2,φ (in water) values were taken from literature [31]. The results have been presented in Table 5.…”

Section: Resultsmentioning

confidence: 99%

Effect of temperature on volumetric and viscosity properties of some α-amino acids in aqueous calcium chloride solutions

Yan

Wang

Kong

et al. 2004

Fluid Phase Equilibria

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178

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Apparent molar volumes and viscosity B-coefficients of some α-amino acids in aqueous solutions from 278.15 to 308.15K

Cited by 155 publications

References 21 publications

Volumetric interactions of a series of α-amino acids in aqueous magnesium chloride solutions at 278.15, 288.15, 298.15, and 308.15 K

Volumetric interactions of a series of α-amino acids in aqueous magnesium chloride solutions at 278.15, 288.15, 298.15, and 308.15 K

Volumetric, viscometric and refractive index behavior of some α-amino acids in aqueous tetrapropylammonium bromide at different temperatures

Effect of temperature on volumetric and viscosity properties of some α-amino acids in aqueous calcium chloride solutions

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