Molar Isentropic Compression Of Transfer Research Articles

Volumetric and ultrasonic properties of α-amino acids (glycine, l-alanine and l-valine) in aqueous diammonium hydrogen phosphate at different temperatures and concentrations

The density and speed of sound measurements have been carried out for some α-amino acids i.e. glycine, l-alanine and l-valine in aqueous diammonium hydrogen phosphate (DAP) at 10K intervals, from 288.15K to 318.15K and experimental pressure p=0.1MPa. We have utilized the density and speed of sound data for determining the apparent molar and partial molar parameters concerning volumetric and compressibility properties. The group contribution of amino acids to partial molar volumes has also been perceived. The pair and triplet interaction coefficients obtained from partial molar volumes of transfer and partial molar isentropic compression of transfer illustrate the dominance of pairwise interactions. The possible molecular associations such as solute-solvent and solute-solute etc. are revealed by the present work and in due course, it has also been observed that all the amino acids in our present study, act as structure makers in aqueous solution of diammonium hydrogen phosphate (DAP). Apparent molar properties and partial molar properties anticipate the dominance of strong solute–solvent interactions over weak solute-solute in the studied ternary system.

Temperature dependence of the volumetric and acoustic behaviour of aqueous mixtures of monosaccharides and trilithium citrate

Densities (ρ) and speeds of sound (c) measurements of d(−)-ribose and d(+)-xylose in (0.2, 0.4, 0.6) mol·kg−1 aqueous solutions of trilithium citrate (TLC) have been carried out at different temperatures. The experimental results were used to calculate apparent molar and partial molar quantities, partial molar volumes and partial molar isentropic compression of transfer. The pair and triplet interaction coefficients are computed from transfer parameters. The partial molar expansibilities have also been calculated. The results have been interpreted in terms of prevailing interactions and structure making and breaking tendency of the solutes in aqueous solution of TLC.

Solvation behavior of glycine and glycyl dipeptide in aqueous 1-butyl-3-methylimidazolium bromide ionic liquid solutions at different temperatures

Densities and speeds of sound of glycine and glycyl dipeptide (glycylglycine) in aqueous 1-butyl-3 methylimidazolium bromide, [C4mim][Br] solutions have been measured at T=(288.15, 298.15 and 308.15) K. From the experimental data of density and speed of sound, the apparent molar volumes (Vϕ), apparent molar volumes at infinite dilution (Vϕ0), apparent molar isentropic compression (Kϕ,s) and apparent molar isentropic compression at infinite dilution (Kϕ,S0) have also been determined. Further, the partial molar volumes of transfer (ΔtrVϕ0) and partial molar isentropic compression of transfer (ΔtrKϕ,S0) of glycine and glycyl dipeptide from water to aqueous [C4mim][Br] solutions were calculated to enlighten the interactions such as solute–solute, solute–solvent and solvent–solvent present in these solutions. The apparent molar expansivity (Eϕ0), Hepler's constant values ∂Eϕ0∂TP,thermal expansion coefficient (α) and hydration number (nH) have been evaluated to assist the interpretations earned from the volumetric and acoustic analysis. The Hepler's constant values were found negative for glycine and glycyl dipeptide at all concentrations of ionic liquid except at lower concentration with glycyl dipeptide. The negative sign indicates the co-solutes act a structure breaker.

Study of interactions of d(+)-glucose and d(−)-fructose with trilithium citrate in aqueous medium through volumetric and ultrasonic properties over the temperature range T = (288.15–318.15) K

The interactions of salt trilithium citrate (TLC) with saccharides d(+)-glucose and d(−)-fructose, have been investigated in aqueous medium from density (ρ) and speed of sound (c) measurements at T=(288.15–318.15) K and experimental pressure p=0.1MPa. The apparent molar volume (Vϕ), the partial molar volume (Vϕo) and standard partial molar volumes of transfer (ΔVϕo) for both saccharides, from water to aqueous trilithium citrate (TLC) have been calculated from density data. The limiting apparent molar expansibilities have also been calculated. The apparent molar isentropic compression (Kϕ,s), partial molar isentropic compression (Kϕ,so) and partial molar isentropic compression of transfer (ΔKϕ,so) have been calculated from speed of sound results. The pair and triplet interaction coefficients have been calculated from partial molar volumes of transfer and partial molar isentropic compression of transfer. A detailed insight into the physicochemical interactions e.g. ion–hydrophilic, hydrophilic–hydrophilic and hydrophilic–hydrophobic interactions in the saccharide-salt system along with the structure-making/structure-breaking tendency of the saccharides, have been retrieved through the perusal of these calculated parameters.

Densities and Speeds of Sound of Antibiotic Drug Chloramphenicol with l-Leucine and Glycyl-l-leucine in Aqueous Medium at T = (288.15–318.15) K: A Volumetric, Ultrasonic, and UV Absorption Study

From the density (ρ) and speed of sound (c) measurements, the interactions of drug chloramphenicol with l-leucine and the dipeptide glycyl-l-leucine, have been examined in aqueous medium at T = (288.15–318.15) K and experimental pressure p = 0.1 MPa. For l-leucine and the dipeptide, the apparent molar volume (Vϕ), the apparent partial molar volume (Vϕo), and the apparent partial molar volumes of transfer (ΔVϕo), from water to aqueous chloramphenicol have been calculated from density data. We have also calculated the limiting apparent molar expansibilities. From the speed of sound data, apparent molar isentropic compression (Kϕ,s), apparent partial molar isentropic compression (Kϕ,so), and apparent partial molar isentropic compression of transfer (ΔKϕ,so) have been calculated. The pair and triplet interaction coefficients are determined from apparent partial molar volumes of transfer and apparent partial molar isentropic compression of transfer. For the present mixtures, the absorption spectra have also be...

Solvation behaviour of some amino acids in aqueous solutions of an antibiotic drug streptomycin sulfate at different temperatures: Volumetric, acoustic and viscometric approach

The volumetric, acoustic and viscometric approach has been used for investigating the interactions of l-serine, l-threonine and l-leucine in aqueous solutions of an antimycobacterial drug, namely, streptomycin sulfate, over a temperature range of (305.15, 310.15 and 315.15) K at atmospheric pressure. The apparent molar volume, Vϕ, limiting apparent molar volume, V0ϕ, the slope, Sv, partial molar volume of transfer, V0ϕ, tr, limiting apparent molar expansivity, E0ϕ, and Hepler's constant, (∂2V0ϕ/∂T2)P, have been calculated from density data. The apparent molar isentropic compression, Kϕ,s, limiting apparent molar isentropic compression, K0ϕ,s, its slope, Sk, and partial molar isentropic compression of transfer, K0ϕ,s,tr, have been calculated from speed of sound data. The compression data is also used for calculating the number of water molecules hydrated, nH, to the amino acids. The viscosity data has been used to determine relative viscosity ηr, viscosity B-coefficients, temperature derivative of B-coefficients, dB/dT and viscosity B-coefficients of transfer, Btr. Solvation behaviour, of amino acids has also been computed. 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, e.g., ion-hydrophilic and hydrophilic–hydrophilic interactions in the amino acids in conjunction with the drug along with the structure-making/structure-breaking tendency has been retrieved through the perusal of these calculated parameters.

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

Apparent molar volumes (Vϕ) and apparent molar isentropic compression (Kϕ,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=0.1MPa, from the density and speed of sound measurements. The partial molar volume Vϕo, standard partial molar volumes of transfer ΔVϕo for amino acids from water to aqueous thiamine-HCl, partial molar isentropic compression Kϕ,s and partial molar isentropic compression of transfer ΔKϕ,so 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 (∂Vϕo/∂T)p, second order derivative (∂2Vϕo/∂T2)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.

Densities and Speeds of Sound of d(+)-Glucose, d(−)-Fructose, d(+)-Xylose and d(−)-Ribose in Aqueous Tripotassium Citrate Solutions at Different Temperatures

Apparent molar volumes (Vϕ) and apparent molar isentropic compressions (Kϕ,S) for some monosaccharides {d(+)-glucose, d(−)-fructose, d(+)-xylose and d(−)-ribose} in (0.0, 0.2, 0.4, 0.6) mol·kg–1 aqueous solutions of tripotassium citrate (TPC) have been determined from density and speeds of sound measurements along four isotherms at temperatures between (288.15 and 318.15) K at experimental pressure p = 0.1 MPa using an automated vibrating tube densimeter (Anton Paar DSA 5000 M). The experimental values are used to determine partial molar volume (Vϕ0), partial molar isentropic compression (Kϕ,S0) at infinite dilution and their corresponding partial molar volumes of transfer (ΔVϕ0), and partial molar isentropic compression of transfer (ΔKϕ,S0). The expansibility parameter (∂Vϕ0/∂T)P and its derivative (∂2Vϕ0/∂T2)P along with pair (VAB, KAB) and triplet (VABB, KABB) interaction coefficient for density and speed of sound data have been determined. The interpretation of the data has been made in terms of solut...

Study of thermodynamic properties of sodium dodecyl sulphate in aqueous solutions of alkoxyalkanols at different temperatures

Densities, ρ, speed of sound, u , for aqueous solutions of alkoxyalkanols like ethylene glycol mono methyl ether (EGMME), ethylene glycol mono ethyl ether (EGMEE) and ethylene glycol mono butyl ether (EGMBE) have been measured in aqueous solutions of surfactant sodium dodecyl sulphate (SDS) at temperatures T=(288.15, 298.15, 308.15 and 318.15)K have been measured. The different parameters such as apparent molar volume, limiting apparent molar volume, transfer volume, partial molar expansibility have been derived from density data to study the nature of interactions and also the aggregation behavior of surfactant with alkoxyalkanols. Experimental speeds of sound data were used to estimate apparent molar isentropic compression, limiting apparent molar isentropic compression, partial molar isentropic compression of transfer. The pair and triplet interaction coefficient have been calculated from both the properties. These parameters have been discussed in the light of ion-ion and ion-solvent interactions.

Newlight Technologies to use AirCarbon biocatalysis technology to convert methane

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.

Volumetric and ultrasonic investigation of molecular interactions of l-serine and l-threonine in aqueous nicotinamide solutions at T = (288.15–318.15) K

In this work, densities and speeds of sound have been measured for l-serine and l-threonine in aqueous solutions of nicotinamide at T=(288.15, 298.15, 308.15, 318.15)K and atmospheric pressure. The apparent molar volume (Vϕ), the limiting apparent molar volume (Vϕο) and limiting apparent molar volumes of transfer (ΔVϕο) for amino acids from water to aqueous nicotinamide have been calculated from density data. The limiting apparent molar expansibilities have also been calculated. Apparent molar isentropic compression (Kϕ,s), limiting apparent molar isentropic compression (Kϕ,sο) and limiting apparent molar isentropic compression of transfer (ΔKϕ,sο) have been calculated from speed of sound data. The pair and triplet interaction coefficients are obtained from limiting apparent molar volumes of transfer and limiting apparent molar isentropic compression of transfer. The present study deals with the structure-making and breaking behavior of l-serine and l-threonine in aqueous nicotinamide solutions.

Volumetric, ultrasonic and UV absorption studies on interactions of antibiotic drug chloramphenicol with glycine and its dipeptide in aqueous solutions at T = (288.15–318.15) K

The interactions of the drug chloramphenicol with glycine and its dipeptide i.e. glycylglycine have been investigated in aqueous medium from density (ρ) and speed of sound(c) measurements at T=(288.15, 298.15, 308.15, 318.15)K and experimental pressure p=0.1MPa. The apparent molar volume (Vϕ), the partial molar volume (Vϕo) and standard partial molar volumes of transfer (ΔVϕo) for glycine and its dipeptide, from water to aqueous chloramphenicol have been calculated from density values. The limiting apparent molar expansibilities have also been calculated. The apparent molar isentropic compression (Kϕ,s), partial molar isentropic compression (Kϕ,so) and partial molar isentropic compression of transfer (ΔKϕ,so) have been calculated from speed of sound values. The pair and triplet interaction coefficient have been calculated from both the properties. The absorption spectra have also been recorded for present mixtures with the help of UV–visible spectrophotometer. A detailed insight into the physicochemical interactions e.g. ion-hydrophilic, hydrophilic–hydrophilic and hydrophilic–hydrophobic interactions in the glycine/glycylglycine-drug system along with the structure-making/structure-breaking tendency of the glycine and its dipeptide have been retrieved through the perusal of these calculated parameters.

Solvation Behavior of Glycine, l-Alanine, and l-Valine in Aqueous Solutions of Triammonium Citrate at Different Temperatures with Reference to Speeds of Sound Measurements

The speeds of sound measurements are carried out for investigating the interactions of glycine, l-alanine, and l-valine in $$(0.2, 0.4, 0.6, \hbox { and } 0.8)\hbox { mol}{\cdot }\hbox {kg}^{-1}$$ solutions of triammonium citrate (TAC) at $$T = (288.15, 298.15, 308.15, \hbox { and } 318.15)\hbox { K}$$ . The speeds of sound values were used to determine apparent molar isentropic compression ( $$\kappa _{\phi ,s})$$ , partial molar isentropic compression ( $$\kappa _{\phi ,s}^0)$$ , hydration number ( $$n_{H})$$ , standard partial molar isentropic compression of transfer ( $$\Delta \kappa _{\phi ,S}^0)$$ . The pair and triplet interaction coefficients have also been calculated. The results have been discussed in terms of prevailing interactions between amino acids and TAC solutions.

Volumetric and Acoustic Behavior of d(+)-glucose and d(−)-fructose in Aqueous Trisodium Citrate Solutions at Different Temperatures

Apparent molar volumes (V ϕ ) and apparent molar isentropic compressions (K ϕ,S ) for saccharides d(+)-glucose and d(−)-fructose have been determined in water and (0.2, 0.4, and 0.6) mol·kg−1 aqueous solutions of trisodium citrate at T = (288.15, 298.15, 308.15 and 318.15) K and atmospheric pressure from density and speed of sound data. The partial molar volumes ( $$ V_{\phi }^{0} $$ ) and the standard partial molar volumes of transfer ( $$ \Delta V_{\phi }^{0} $$ ) from water to aqueous trisodium citrate solutions have been calculated. The partial molar expansion coefficients $$ (\partial V_{\phi }^{0} /\partial T)_{p} $$ and their second derivative $$ (\partial^{2} V_{\phi }^{0} /\partial T^{2} )_{p} $$ have also been estimated. The partial molar isentropic compression ( $$ K_{\phi ,S}^{0} $$ ) and partial molar isentropic compression of transfer ( $$ \Delta K_{\phi ,S}^{0} $$ ) have been calculated from the speed of sound data. Pair and triplet interaction parameters (V AB, V ABB) and (K AB and K ABB) from volumetric and speed of sound data, respectively, have been calculated using the McMillan–Mayer theory The results are discussed in terms of stereochemistry of the solutes and prevailing interaction in the mixtures.

Volumetric, acoustic and viscometric behaviour of dipotassium hydrogen phosphate and disodium hydrogen phosphate in aqueous solution of N-acetyl glycine at different temperatures

Densities, speeds of sound and viscosities of dipotassium hydrogen phosphate (DPHP) and disodium hydrogen phosphate (DSHP) in aqueous solutions of N-acetyl glycine (AcGly) are reported at different temperatures. Densities and speeds of sound have been used to calculate apparent molar volume, apparent molar isentropic compression, partial molar volume, partial molar isentropic compression, partial molar volume of transfer, partial molar isentropic compression of transfer and partial molar expansivity. Pair and triplet interaction coefficients have also been calculated. Experimental viscosities have been used to determine B-coefficients. Further pair and triplet interaction coefficients have also been calculated. The results are discussed in terms of solute–solvent interactions.

Volumetric, acoustical and viscometric behavior of glycine and DL-alanine in aqueous furosemide solutions at different temperatures

Drug (furosemide)–amino acid (glycine and DL-alanine) interactions have been investigated in aqueous medium from density (ρ), speed of sound (u) and viscosity (η) studies. The density and speed of sound data has been employed to obtain partial molar volume(Vϕo), partial molar volume of transfer(ΔtrVϕo), partial molar expansion coefficient∂Vϕo∂Tp, second derivative∂2Vϕo∂T2p, isentropic compressibility(κs), partial molar isentropic compressibility (κϕ,so) and partial molar isentropic compressibility of transfer(Δtrκϕ,so). The viscosity data have been used to calculate the viscosity B-coefficients, its temperature derivative dB/dT, viscosity B-coefficient of transfer (ΔtrB) and various thermodynamic parameters of activation of viscous flow for amino acids in furosemide solutions. A detailed insight into the physicochemical interactions e.g. ionic–hydrophilic, hydrophilic–hydrophilic and hydrophilic–hydrophobic interactions in the amino acid-drug system along with the structure-making/structure-breaking tendency of amino acids have been retrieved through the perusal of these calculated parameters.

Interionic Interactions of Aqueous Mixtures of Ionic Liquid 1-Hexyl-3-methylimidazolium Chloride with Phosphate Salts at T = (288.15 to 308.15) K: Volumetric, Acoustic and UV Absorption Studies

The interactions of phosphate salts like disodium hydrogen phosphate (Na2HPO4) and dipotassium hydrogen phosphate (K2HPO4) with 1-hexyl-3-methylimidazolium chloride ([C6mim][Cl]) as a function of temperature have been investigated by combination of volumetric and acoustic measurements. Densities, ρ, and speeds of sound, u, for phosphate salts in aqueous solutions of 1-hexyl-3-methylimidazolium chloride have been measured at T = (288.15, 293.15, 298.15, 303.15, 308.15) K and atmospheric pressure. The apparent molar volume, limiting apparent molar volume and standard partial molar volumes of transfer for phosphate salts from water to aqueous 1-hexyl-3-methylimidazolium chloride solutions have been calculated from density data. Apparent molar isentropic compression, limiting apparent molar isentropic compression and standard partial molar isentropic compression of transfer have been calculated from speeds of sound data. The UV absorption studies have also made in this study. The results have been explained i...

Investigation on solute–solvent interactions of glycine, l-alanine and l-valine in aqueous tetraethylammonium iodide solutions at different temperatures with reference to volumetric and acoustic measurements

The interactions of amino acids glycine, l-alanine and l-valine with tetraethylammonium iodide (TEAI) as a function of temperature have been investigated by a combination of volumetric and acoustic measurement. Densities (ρ) and ultrasonic speeds (u) of amino acids in aqueous solutions of TEAI have been measured at T=(288.15, 293.15, 298.15, 303.15 and 308.15)K and p=0.1MPa. The apparent molar volume (V∅), the partial molar volume (V∅0) and standard partial molar volumes of transfer (ΔV∅0) for amino acids from water to aqueous TEAI solutions have been calculated from density values. Apparent molar isentropic compressibility (K∅,s), partial molar isentropic compressibility (K∅,s0), partial molar isentropic compressibility of transfer (ΔK∅,s0) have been calculated from values of the ultrasonic speed. The pair and triplet interaction coefficients have been calculated from both properties. The linear variation of V∅0 with the number of carbon atoms in the alkyl chain of amino acids has been utilized to calculate the contribution of the charged end groups (NH3+,COO-), (CH2) group and other alkyl chains of the amino acids to V∅0. The results obtained are discussed in the light of various interactions operating in ternary systems of amino acids, water and TEAI.

Studies of interionic interactions of l-serine/l-threonine in aqueous trilithium citrate solutions using density and speeds of sound measurements at different temperatures

Densities and speeds of sound of l-serine and l-threonine in aqueous solutions of trilithium citrate have been measured at T=288.15, 298.15, 308.15 and 318.15K and atmospheric pressure. The apparent molar volume (Vϕ), the partial molar volume (Vϕ0) and standard partial molar volumes of transfer (ΔVϕ0) for amino acids from water to aqueous trilithium citrate have been calculated from density data. Group contributions of amino acids to partial molar volume were determined. The limiting apparent molar expansibilities have also been calculated. Partial molar isentropic compression (Kϕ,s) and partial molar isentropic compression of transfer (ΔKϕ,S0) have been calculated from speed of sound data. Hydration number (nH) has also been calculated. The pair and triplet interaction coefficients have been calculated from both the properties. The results have been explained based on competing patterns of interactions of co-solvents and the solute.

Study of solute–solute and solute–solvent interactions of N-acetyl glycine in aqueous d-fructose solutions at different temperatures

Densities (ρ) and ultrasonic speeds (u) for N-acetyl glycine (AG) in (0.05, 0.15, 0.25 and 0.35molkg−1) aqueous d-fructose (FR) solutions have been measured at temperatures (288.15, 293.15, 298.15, 303.15 and 308.15)K and at pressure 101kPa. These data have been used to calculate apparent molar volume (Vϕ) and acoustical parameters, coefficient of isentropic compression (βs), molal hydration number (nH) and apparent molar isentropic compression (Kϕ,s). Partial molar volumes (Vϕ0) and partial molar isentropic compression (Kϕ,s0) of AG at infinite dilutions were also evaluated. The partial molar volumes of transfer (ΔVϕ0) and partial molar isentropic compression of transfer (ΔKϕ,s0) of AG from aqueous to aqueous FR solutions have been calculated and interpreted in terms of solute-co-solute interactions. Pair and triplet interaction coefficients have also been calculated. The results have been used to investigate the solute–solute and solute–solvent interactions as well as the effect of the concentration of FR on these interactions. It is observed that there exist strong solute–solvent interactions in these systems. The data of transfer parameters suggest that the type of interactions present in these systems are complex depending both on the nature of side group as well as on temperature.