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Harsh Kumar - One of the best experts on this subject based on the ideXlab platform.
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volumetric and acoustic properties of amino acids l leucine and l serine in aqueous solution of ammonium dihydrogen phosphate adp at different temperatures and concentrations
The Journal of Chemical Thermodynamics, 2020Co-Authors: Harsh Kumar, Vaneet Kumar, Seema Sharma, Arjuna Katal, Asma A AlothmanAbstract:Abstract The physicochemical properties of amino acids like L-Leucine and L-Serine in aqueous solution of ammonium dihydrogen Phosphate (ADP) at different temperature analysed by volumetric and acoustic methods. By using density data, apparent molar volume Vϕ ,partial molar volume V ϕ 0 and standard partial molar volume of transfer Δ V ϕ 0 have been evaluated. From speed of sound data, apparent molar Isentropic compression K ϕ , s apparent partial molar Isentropic compression K ϕ , s 0 and partial molar Isentropic compression of transfer Δ K ϕ , s o have been calculated. The pair and triplet interaction coefficient have also been calculated. The results have been interpreted in terms of solute – solute and solvent-solvent interactions.
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volumetric and ultrasonic studies on interactions of ethylene glycol diethylene glycol and triethylene glycol in aqueous solutions of glycerol at temperatures t 293 15 k 308 15 k
The Journal of Chemical Thermodynamics, 2018Co-Authors: Kirandeep Kaur, K C Juglan, Isha Behal, Harsh KumarAbstract:Abstract Densities and ultrasonic speed of ethylene glycol, diethylene glycol and triethylene glycol in (0.00, 0.01, 0.03, 0.05) mol kg−1 aqueous solutions of glycerol have been measured at T = (293.15, 298.15, 303.15, 308.15) K and experimental pressure p = 0.1 MPa. From the density data, the apparent molar volume Vϕ, the partial molar volume V ϕ o and the partial molar volumes of transfer Δ V ϕ o have been calculated for glycols from water to aqueous glycerol solutions. Using ultrasonic speed values apparent molar Isentropic compression Kϕ,s, partial molar Isentropic compression K ϕ , s o and partial molar Isentropic compression of transfer Δ K ϕ , s o , have been evaluated. The pair and triplet coefficients have been computed from partial molar volumes of transfer and partial molar Isentropic compression of transfer. The apparent molar isobaric expansion at infinite dilution ( ∂ V ϕ 0 / ∂ T ) p , second order derivative ( ∂ 2 V ϕ 0 / ∂ T 2 ) p have also been calculated. The parameters thus obtained have been discussed in terms of (solute–solute)/(solute–solvent) interactions prevailing in the present ternary system along with structure making/structure breaking tendency of glycols in aqueous glycerol solutions.
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Temperature dependent physicochemical studies of polyethylene glycols (PEG-400 and PEG-4000) in aqueous sorbitol solutions
Journal of Molecular Liquids, 2018Co-Authors: Kirandeep Kaur, K C Juglan, Harsh KumarAbstract:Abstract From the measurements of density and speed of sound, the apparent molar properties and the partial molar properties have been determined to study the interactions of two polyethylene glycols i.e. polyethylene glycol 400 and polyethylene glycol 4000 in aqueous solutions of sorbitol at experimental pressure p = 0.1 MPa and temperatures T = (288.15–318.15) K. Evaluation of partial molar volume (Vϕo), apparent molar volume (Vϕ) and partial molar volumes of transfer (ΔVϕo) is done using density measurements. For the determination of partial molar Isentropic compression (Kϕ, so), apparent molar Isentropic compression (Kϕ, s), and partial molar Isentropic compression of transfer (ΔKϕ, so), the ultrasonic speed measurements have been utilized. The limiting apparent molar expansibilities (Eϕ0) and its first order derivatives (∂Eϕ0/∂T)p are also calculated. Further, with the aid of partial molar Isentropic compression of transfer and partial molar volumes of transfer, pair and triplet coefficients are determined. Through the scrutiny of these evaluated parameters, the results are elucidated based upon contending patterns of physicochemical interactions of co-solutes and solvents prevailing in present ternary liquid mixtures.
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densities and speeds of sound of solutions of glycine l alanine and l valine in aqueous ammonium dihydrogen phosphate at different temperatures
Journal of Chemical & Engineering Data, 2017Co-Authors: Harsh Kumar, Isha BehalAbstract:Densities (ρ) and speeds of sound (c) of solutions of some α-amino acids such as glycine, l-alanine, and l-valine in aqueous ammonium dihydrogen phosphate (ADP) were measured at T = (288.15–318.15) K and experimental pressure p = 0.1 MPa. By using the experimentally measured densities, the apparent molar volume (Vϕ), the partial molar volume at infinite dilution (Vϕo), and partial molar volumes of transfer (ΔVϕo), from water to aqueous ADP have been calculated. Further, apparent molar Isentropic compression (Kϕ,s), partial molar Isentropic compression at infinite dilution (kϕ,so) and partial molar Isentropic compression of transfer (ΔKϕ,so) were calculated from the ultrasonic speeds. The group contributions of amino acid to partial molar volumes have also been discerned. From partial molar volumes of transfer and partial molar Isentropic compression of transfer, the pair and triplet interaction coefficients are attained. We have also intended partial molar expansion (∂Vϕo/∂T)p and second order derivative ...
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Densities and Speeds of Sound of Solutions of Glycine, l‑Alanine, and l‑Valine in Aqueous Ammonium Dihydrogen Phosphate at Different Temperatures
2017Co-Authors: Harsh Kumar, Isha BehalAbstract:Densities (ρ) and speeds of sound (c) of solutions of some α-amino acids such as glycine, l-alanine, and l-valine in aqueous ammonium dihydrogen phosphate (ADP) were measured at T = (288.15–318.15) K and experimental pressure p = 0.1 MPa. By using the experimentally measured densities, the apparent molar volume (Vϕ), the partial molar volume at infinite dilution (Vϕo), and partial molar volumes of transfer (ΔVϕo), from water to aqueous ADP have been calculated. Further, apparent molar Isentropic compression (Kϕ,s), partial molar Isentropic compression at infinite dilution (kϕ,so) and partial molar Isentropic compression of transfer (ΔKϕ,so) were calculated from the ultrasonic speeds. The group contributions of amino acid to partial molar volumes have also been discerned. From partial molar volumes of transfer and partial molar Isentropic compression of transfer, the pair and triplet interaction coefficients are attained. We have also intended partial molar expansion (∂Vϕo/∂T)p and second order derivative (∂2Vϕo/∂T2)p. The achieved results are construed in terms of (solute + solvent) and (solute + solute) interactions accompanied by structure making and structure breaking behavior of amino acids in aqueous ADP solutions
Jose M Navaza - One of the best experts on this subject based on the ideXlab platform.
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density speed of sound Isentropic compressibility and excess volume of binary mixtures of 1 amino 2 propanol or 3 amino 1 propanol with 2 amino 2 methyl 1 propanol diethanolamine or triethanolamine from 293 15 to 323 15 k
Journal of Chemical & Engineering Data, 2010Co-Authors: Estrella Alvarez, Diego Gomezdiaz, Fernando Cerdeira, Jose M NavazaAbstract:Density and speed of sound binary mixtures of 1-amino-2-propanol (MIPA) or 3-amino-1-propanol (AP) with 2-amino-1-methyl-1-propanol (AMP), diethanolamine (DEA), or triethanolamine (TEA) were measured over the entire composition range and at temperatures from (293.15 to 323.15) K. The experimental values were used to calculate the Isentropic compressibilities, excess molar volumes, and Isentropic compressibility deviations. Redlich−Kister type polynomial equations were used to fit the excess molar volumes and Isentropic compressibility deviations.
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density speed of sound Isentropic compressibility and excess volume of monoethanolamine 2 amino 2 methyl 1 propanol monoethanolamine triethanolamine and monoethanolamine n methyldiethanolamine at temperatures from 293 15 to 323 15 k
Journal of Chemical & Engineering Data, 2010Co-Authors: Estrella Alvarez, Diego Gomezdiaz, Fernando Cerdeira, Jose M NavazaAbstract:Density and speed of sound of (monoethanolamine + 2-amino-2-methyl-1-propanol), (monoethanolamine + triethanolamine), and (monoethanolamine + N-methyldiethanolamine) were measured over the entire composition range and at temperatures from (293.15 to 323.15) K. The experimental values were used to calculate the Isentropic compressibilities, excess molar volumes, and Isentropic compressibility deviations. Redlich−Kister-type polynomial equations were used to fit the excess molar volumes and Isentropic compressibility deviations.
Isha Behal - One of the best experts on this subject based on the ideXlab platform.
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volumetric and ultrasonic studies on interactions of ethylene glycol diethylene glycol and triethylene glycol in aqueous solutions of glycerol at temperatures t 293 15 k 308 15 k
The Journal of Chemical Thermodynamics, 2018Co-Authors: Kirandeep Kaur, K C Juglan, Isha Behal, Harsh KumarAbstract:Abstract Densities and ultrasonic speed of ethylene glycol, diethylene glycol and triethylene glycol in (0.00, 0.01, 0.03, 0.05) mol kg−1 aqueous solutions of glycerol have been measured at T = (293.15, 298.15, 303.15, 308.15) K and experimental pressure p = 0.1 MPa. From the density data, the apparent molar volume Vϕ, the partial molar volume V ϕ o and the partial molar volumes of transfer Δ V ϕ o have been calculated for glycols from water to aqueous glycerol solutions. Using ultrasonic speed values apparent molar Isentropic compression Kϕ,s, partial molar Isentropic compression K ϕ , s o and partial molar Isentropic compression of transfer Δ K ϕ , s o , have been evaluated. The pair and triplet coefficients have been computed from partial molar volumes of transfer and partial molar Isentropic compression of transfer. The apparent molar isobaric expansion at infinite dilution ( ∂ V ϕ 0 / ∂ T ) p , second order derivative ( ∂ 2 V ϕ 0 / ∂ T 2 ) p have also been calculated. The parameters thus obtained have been discussed in terms of (solute–solute)/(solute–solvent) interactions prevailing in the present ternary system along with structure making/structure breaking tendency of glycols in aqueous glycerol solutions.
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densities and speeds of sound of solutions of glycine l alanine and l valine in aqueous ammonium dihydrogen phosphate at different temperatures
Journal of Chemical & Engineering Data, 2017Co-Authors: Harsh Kumar, Isha BehalAbstract:Densities (ρ) and speeds of sound (c) of solutions of some α-amino acids such as glycine, l-alanine, and l-valine in aqueous ammonium dihydrogen phosphate (ADP) were measured at T = (288.15–318.15) K and experimental pressure p = 0.1 MPa. By using the experimentally measured densities, the apparent molar volume (Vϕ), the partial molar volume at infinite dilution (Vϕo), and partial molar volumes of transfer (ΔVϕo), from water to aqueous ADP have been calculated. Further, apparent molar Isentropic compression (Kϕ,s), partial molar Isentropic compression at infinite dilution (kϕ,so) and partial molar Isentropic compression of transfer (ΔKϕ,so) were calculated from the ultrasonic speeds. The group contributions of amino acid to partial molar volumes have also been discerned. From partial molar volumes of transfer and partial molar Isentropic compression of transfer, the pair and triplet interaction coefficients are attained. We have also intended partial molar expansion (∂Vϕo/∂T)p and second order derivative ...
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Densities and Speeds of Sound of Solutions of Glycine, l‑Alanine, and l‑Valine in Aqueous Ammonium Dihydrogen Phosphate at Different Temperatures
2017Co-Authors: Harsh Kumar, Isha BehalAbstract:Densities (ρ) and speeds of sound (c) of solutions of some α-amino acids such as glycine, l-alanine, and l-valine in aqueous ammonium dihydrogen phosphate (ADP) were measured at T = (288.15–318.15) K and experimental pressure p = 0.1 MPa. By using the experimentally measured densities, the apparent molar volume (Vϕ), the partial molar volume at infinite dilution (Vϕo), and partial molar volumes of transfer (ΔVϕo), from water to aqueous ADP have been calculated. Further, apparent molar Isentropic compression (Kϕ,s), partial molar Isentropic compression at infinite dilution (kϕ,so) and partial molar Isentropic compression of transfer (ΔKϕ,so) were calculated from the ultrasonic speeds. The group contributions of amino acid to partial molar volumes have also been discerned. From partial molar volumes of transfer and partial molar Isentropic compression of transfer, the pair and triplet interaction coefficients are attained. We have also intended partial molar expansion (∂Vϕo/∂T)p and second order derivative (∂2Vϕo/∂T2)p. The achieved results are construed in terms of (solute + solvent) and (solute + solute) interactions accompanied by structure making and structure breaking behavior of amino acids in aqueous ADP solutions
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thermodynamics of solute solute and solute solvent interactions of homologous series of amino acids with thiamine hydrochloride in aqueous medium at t 305 15 310 15 315 15 k a volumetric and acoustic approach
The Journal of Chemical Thermodynamics, 2016Co-Authors: Harsh Kumar, Isha BehalAbstract:Abstract Apparent molar volumes ( V ϕ ) and apparent molar Isentropic compression ( K ϕ , s ) of glycine, l -alanine, l -valine and l -leucine in (0.05, 0.10, 0.15, 0.20) mol·kg−1 aqueous solution of thiamine hydrochloride (thiamine-HCl) have been determined at T = (305.15, 310.15 and 315.15) K and experimental pressure p = 0.1 MPa, from the density and speed of sound measurements. The partial molar volume V ϕ o , standard partial molar volumes of transfer Δ V ϕ o for amino acids from water to aqueous thiamine-HCl, partial molar Isentropic compression K ϕ , s and partial molar Isentropic compression of transfer Δ K ϕ , s o have been calculated from the corresponding data. Group contributions of amino acids to partial molar volume are also determined. The pair and triplet interaction coefficients are obtained from partial molar volumes of transfer and partial molar Isentropic compression of transfer. The partial molar expansibility ( ∂ V ϕ o / ∂ T ) p , second order derivative ( ∂ 2 V ϕ o / ∂ T 2 ) p have also been calculated. The parameters obtained have been used to explain the results in terms of (solute-solute)/(ion-ion), (solute-solvent) interactions, structure making and structure breaking behaviour of amino acids in aqueous thiamine-HCl solutions.
J S Urieta - One of the best experts on this subject based on the ideXlab platform.
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speed of sound and Isentropic compressibility of the ternary mixture 2 butanol n hexane 1 butylamine and the constituent binary mixtures at 298 15 k and 313 15 k
Journal of Molecular Liquids, 2000Co-Authors: M Dominguez, H Artigas, Pilar Cea, M C Lopez, J S UrietaAbstract:Abstract Densities and speeds of sound for (2-Butanol + n -Hexane + 1-Butylamine) at 298.15K and 313.15 K, and the constituent binary mixtures (2-Butanol + n -Hexane), (2-Butanol + 1-Butylamine) at 298.15 K and 313.15 K, and ( n -Hexane + 1-Butylamine), at 313.15 K have been measured. The Isentropic compressibilities, the excess Isentropic compressibilities, and the speeds of sound deviations have been calculated for both the binary and the ternary systems, from the experimental data. The Isentropic compressibilities have been compared with calculated values from the Free Length Theory (FLT) and Collision Factor Theory (CFT).
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Isentropic compressibilities of the ternary mixture cyclohexane tetrahydrofuran chlorocyclohexane at 298 15 and 313 15 k
Journal of Molecular Liquids, 2000Co-Authors: Carlos Lafuente, Juan I Pardo, F M Royo, J S UrietaAbstract:Abstract Densities and speeds of sound for the ternary mixture (cyclohexane + tetrahydrofuran + chlorocyclohexane) and the binary mixtures (cyclohexane + tetrahydrofuran) and (cyclohexane + chlorocyclohexane) have been measured at 298.15 and 313.15 K. The Isentropic compressibilities and the excess Isentropic compressibilities have been calculated from the experimental data. Excess Isentropic compressibilities of the mixtures have been fitted to Redlich-Kister's (binary mixtures) and Cibulka's equation (ternary mixture). The Isentropic compressibilities have been compared with values calculated from the Free Length Theory and Collision Factor Theory.
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densities speeds of sound and Isentropic compressibilities of a cyclic ether with chlorocyclohexane or bromocyclohexane at the temperatures 298 15 k and 313 15 k
The Journal of Chemical Thermodynamics, 1999Co-Authors: S Rodriguez, H Artigas, Carlos Lafuente, F M Royo, J S UrietaAbstract:Abstract Isentropic compressibilities κSand excess Isentropic compressibilities κESof {xC4H8O, orxC5H10O, orx(CH3)C4H7O, orx(CH3)2C4H6O+(1−x)C6H11Cl, or (1−x)C6H11Br} were calculated from measured density and speed of sound measurements atT=(298.15 and 313.15) K. The excess Isentropic compressibilities were fitted to the Redlich–Kister equation. The mixtures studied show large negative values for κES.
Estrella Alvarez - One of the best experts on this subject based on the ideXlab platform.
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density speed of sound Isentropic compressibility and excess volume of binary mixtures of 1 amino 2 propanol or 3 amino 1 propanol with 2 amino 2 methyl 1 propanol diethanolamine or triethanolamine from 293 15 to 323 15 k
Journal of Chemical & Engineering Data, 2010Co-Authors: Estrella Alvarez, Diego Gomezdiaz, Fernando Cerdeira, Jose M NavazaAbstract:Density and speed of sound binary mixtures of 1-amino-2-propanol (MIPA) or 3-amino-1-propanol (AP) with 2-amino-1-methyl-1-propanol (AMP), diethanolamine (DEA), or triethanolamine (TEA) were measured over the entire composition range and at temperatures from (293.15 to 323.15) K. The experimental values were used to calculate the Isentropic compressibilities, excess molar volumes, and Isentropic compressibility deviations. Redlich−Kister type polynomial equations were used to fit the excess molar volumes and Isentropic compressibility deviations.
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density speed of sound Isentropic compressibility and excess volume of monoethanolamine 2 amino 2 methyl 1 propanol monoethanolamine triethanolamine and monoethanolamine n methyldiethanolamine at temperatures from 293 15 to 323 15 k
Journal of Chemical & Engineering Data, 2010Co-Authors: Estrella Alvarez, Diego Gomezdiaz, Fernando Cerdeira, Jose M NavazaAbstract:Density and speed of sound of (monoethanolamine + 2-amino-2-methyl-1-propanol), (monoethanolamine + triethanolamine), and (monoethanolamine + N-methyldiethanolamine) were measured over the entire composition range and at temperatures from (293.15 to 323.15) K. The experimental values were used to calculate the Isentropic compressibilities, excess molar volumes, and Isentropic compressibility deviations. Redlich−Kister-type polynomial equations were used to fit the excess molar volumes and Isentropic compressibility deviations.
