Partial molar volumes of some α-amino acids in aqueous sodium acetate solutions at 308.15 K

Wang, Jianji; Yan, Zhenning; Zhuo, Kelei; Lu, Jinsuo

doi:10.1016/s0301-4622(99)00066-6

Cited by 74 publications

(60 citation statements)

References 20 publications

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“…It is found that φ v° values of the studied homologous series of α-amino acids vary linearly with the number of carbon atoms in the alkyl chain of amino acids. Similar linear correlations have also been reported for α-amino acids [24,25], α-amino acids and glycine peptides in aqueous sodium dodecyl sulfate and cetyltrimethylammonium bromide [26], α-ω-amino acids in aqueous ammonium chloride [27], α-amino acids in aqueous calcium chloride [28], and for homologous series of α-and α-ω-amino acids in guanidium chloride and potassium thiocynate solutions [29]. This linear variation was represented by the relation…”

Section: Resultssupporting

confidence: 77%

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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Section: Resultssupporting

confidence: 77%

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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“…As part of the continuation of our studies [22][23][24][25][26], this paper reports a systematic study of the volumetric and viscosity behavior of a series of ␣-amino acids in aqueous calcium chloride solutions at 278. 15, 288.15, 298.15 and 308.15 K. The amino acids chosen were glycine (Gly), dl-␣-alanine (Ala), dl-␣-amino-n-butyric acid (Abu), dl-valine (Val), dl-leucine (Leu) and l-serine (Ser).…”

Section: Introductionmentioning

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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172

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“…Following the procedure used by Wang et al [31] it is found that (V 0 E − V 0 B ) ∼ = −4 cm 3 ·mol −1 at T = 308.15 K. This value of (V 0 E − V 0 B ) has been retained at the other studied temperatures, as suggested by Lark et al [38], to evaluate n H values that are given in Table 7.…”

Section: Resultsmentioning

confidence: 65%

“…2). In the case of V φ , where there is no dependence on m, the values of V 0 φ were calculated by taking an average of all the data points [5,31]. The values of partial molal volumes V 0 φ and partial molal compressibilities K 0 φ (along with S k values) for the amino acids in water and aqueous Tables 3 and 5, respectively.…”

Section: Resultsmentioning

confidence: 99%

Thermodynamic Analysis of Homologous α-Amino Acids in Aqueous Potassium Fluoride Solutions at Different Temperatures

Rajagopal¹,

Gladson

2012

J Solution Chem

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Partial molal volumes (V 0 φ ) and partial molal compressibilities (K 0 φ ) for glycine, L-alanine, L-valine and L-leucine in aqueous potassium fluoride solutions (0.1 to 0.5 mol·kg −1 ) have been measured at T = (303. 15, 308.15, 313.15 and 318.15) K from precise density and ultrasonic speed measurements. Using these data, Hepler coefficients (∂ 2 V 0 φ /∂T 2 ), transfer volumes ( V 0 φ ), transfer compressibilities ( K 0 φ ) and hydration number (n H ) have been calculated. Pair and triplet interaction coefficients have been obtained from the transfer parameters. The values of V 0 φ and K 0 φ vary linearly with increasing number of carbon atoms in the alkyl chain of the amino acids. The contributions of charged end groups (NH + 3 , COO − ), CH 2 group and other alkyl chains of the amino acids have also been estimated. The results are discussed in terms of the solute-cosolute interactions and the dehydration effect of potassium fluoride on the amino acids.

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Partial molar volumes of some α-amino acids in aqueous sodium acetate solutions at 308.15 K

Cited by 74 publications

References 20 publications

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

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

Thermodynamic Analysis of Homologous α-Amino Acids in Aqueous Potassium Fluoride Solutions at Different Temperatures

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