Volumetric, ultrasonic and viscometric studies of solute–solute and solute–solvent interactions of l-threonine in aqueous-sucrose solutions at different temperatures

Nain, Anil Kumar; Pal, Renu; Neetu,

doi:10.1016/j.jct.2013.05.012

Cited by 33 publications

(4 citation statements)

References 38 publications

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“…The decrease in values with increasing concentration of CA may be attributed to the disruption of side group hydration by that of the charged end groups (a similar explanation has been given by Wang et al [ 37 ], which supports our results for the values), whereas the increase in values of glycine/ l -alanine in CA solutions with increase in temperature may lead to reduction of the electrostriction around the zwitterions [ 38 ]. Also, at higher temperatures, solvent from the secondary solvation layer of glycine/ l -alanine is released into the bulk of solvent which results in the expansion of the solution and leads to higher values [ 39 ].…”

Section: Resultsmentioning

confidence: 99%

Volumetric Investigations on Molecular Interactions of Glycine/l-alanine in Aqueous Citric Acid Solutions at Different Temperatures

Patyar

Kaur

2018

J Solution Chem

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Apparent molar volumes of glycine/l-alanine in water and in aqueous citric acid (CA) solutions of varying concentrations, i.e. (0.05, 0.10, 0.20, 0.30, 0.40 and 0.50) mol·kg−1 were determined from density measurements at temperatures T = (288.15, 298.15, 308.15, 310.15 and 318.15) K and at atmospheric pressure. Limiting partial molar volumes and their corresponding partial molar volumes of transfer have been calculated from the data. The negative values obtained for glycine/l-alanine from water to aqueous CA solutions indicate the dominance of hydrophilic–hydrophobic/hydrophobic–hydrophilic and hydrophobic–hydrophobic interactions over ion/hydrophilic–dipolar interactions. Further, pair and triplet interaction coefficients, i.e. along with hydration number have also been calculated. The effect of temperature on the volumetric properties of glycine/l-alanine in water and in aqueous CA solutions has been determined from the limiting partial molar expansibilities and their second-order derivative . The apparent specific volumes for glycine and l-alanine tend to approach sweet taste behavior both in the presence of water and in aqueous CA solutions. The values for glycine/l-alanine increase with increase in concentration of CA at all temperatures studied. This reveals that CA helps in enhancing the sweet taste behavior of glycine/l-alanine which also supports the dominance of hydrophobic–hydrophobic interactions.Electronic supplementary materialThe online version of this article (10.1007/s10953-018-0829-6) contains supplementary material, which is available to authorized users.

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Section: Resultsmentioning

confidence: 99%

Volumetric Investigations on Molecular Interactions of Glycine/l-alanine in Aqueous Citric Acid Solutions at Different Temperatures

Patyar

Kaur

2018

J Solution Chem

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“…[14] The (solute-solvent) interactions seem to be the most significant in the mixture, whereas the (solute-solute) interactions are not as significant, as shown by the low SK*values in Table 8 in comparison to the high, 𝐾 𝜙,𝑆 0 values. [51][52][53][54][55].…”

Section: Partial Molar Isentropic Compressionmentioning

confidence: 99%

Thermo-acoustical analysis of sorbic acid:(food preservative) in an aqueous solution containing propylene glycol:(PG) and hexylene glycol:(HG) by using an ultrasonic technique

Firdaus,

Chakraborty,

Juglan

2024

Preprint

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Within a temperature range of [(293.15 K) to (308.15 K)] and a pressure range of 0.1 MPa, this study analyses molecular interactions in a sorbic acid solution in water. [Sorbic acid + (propylene glycol (PG) / hexylene glycol (HG)) + water] are present in the solution at quantities of [(0.01, 0.03, 0.05) \(mol.{kg}^{-1}\)]. We use the apparatus (Anton Paar DSA 5000 M) to find the density and the speed of sound. From the data we have, we may deduce many thermo-acoustic characteristics. Among the parameters that were experimentally measured were expansibilities, thermal expansion coefficients, volumes of transfer, and partial molar volumes. An effect of sound velocity on apparent molar isentropic compression, partial molar isentropic compression, and partial partial molar isentropic compression were all three forms of transfer pressure. Pair and triplet coefficients, as well as empirical constants, have been discovered to quantify important solute-solvent interactions. ''Propylene glycol has fewer interactions with the solvent than hexylene glycol, according to their characteristics”.

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“…The strong interaction immobilizes the solvent molecules, present obstruction to viscous flow of solution, thus, increasing the viscosity. 37 The temperature derivative of B-coefficients (dB/dT) and its sign is useful in establishing structuremaking or structure-breaking ability of the solute in solvent. In general, the dB/dT is negative for structure-maker and positive for structure-breaker solutes in solution.…”

Section: Viscositymentioning

confidence: 99%

Interactions of L-Aspartic Acid with Aqueous Solution of 1,2-Propanediol at Different Temperatures: A Volumetric, Compressibility and Viscometric Approach

Rani¹,

Kumar²,

Sharma³

et al. 2016

ACSi

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The volumetric, acoustic and viscometric methods are used for investigating the interactions of L-aspartic acid (Asp) in aqueous solution of 1,2-propanediol (PD) over a temperature of (298.15, 303.15 and 308.15) K at atmospheric pressure. Using the experimental results, the apparent molar volume, V φ , limiting apparent molar volume, V 0 φ , the slope, S v , and partial molar volume of transfer, V 0 φ,tr, have been calculated from density data. The apparent molar isentropic compressibility, K φ , s , limiting apparent molar isentropic compressibility, K 0 φ,s , its slope, S k , and partial molar compressibility of transfer, K 0 φ,s, tr , have been calculated from speed of sound data. These values are also used for calculating the number of water molecules hydrated, n H , to the Asp. The viscosity data has also been used to determine relative viscosity η r , viscosity B-coefficients, temperature derivative of B-coefficients, dB/dT and viscosity B-coefficients of transfer, B tr . The calculated parameters have been discussed in terms of various solute-solute and solute-solvent interactions prevailing in these solutions. Further, a detailed insight into the physicochemical interactions between Asp and aqueous PD, e.g., ion-hydrophilic and hydrophilic-hydrophilic interactions along with the structure-making tendency have been retrieved through the perusal of these calculated parameters.

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Volumetric, ultrasonic and viscometric studies of solute–solute and solute–solvent interactions of l-threonine in aqueous-sucrose solutions at different temperatures

Cited by 33 publications

References 38 publications

Volumetric Investigations on Molecular Interactions of Glycine/l-alanine in Aqueous Citric Acid Solutions at Different Temperatures

Volumetric Investigations on Molecular Interactions of Glycine/l-alanine in Aqueous Citric Acid Solutions at Different Temperatures

Thermo-acoustical analysis of sorbic acid:(food preservative) in an aqueous solution containing propylene glycol:(PG) and hexylene glycol:(HG) by using an ultrasonic technique

Interactions of L-Aspartic Acid with Aqueous Solution of 1,2-Propanediol at Different Temperatures: A Volumetric, Compressibility and Viscometric Approach

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