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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 behavior of d glucose and d fructose in aqueous Trisodium Citrate solutions at different temperatures
Journal of Solution Chemistry, 2016Co-Authors: Harsh Kumar, Suresh Kumar SharmaAbstract: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.
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Volumetric and Acoustic Behavior of d(+)-glucose and d(−)-fructose in Aqueous Trisodium Citrate Solutions at Different Temperatures
Journal of Solution Chemistry, 2016Co-Authors: Harsh Kumar, Suresh Kumar SharmaAbstract: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 ( $$ V_{\phi }^{0} $$ V ϕ 0 ) and the standard partial molar volumes of transfer ( $$ \Delta V_{\phi }^{0} $$ Δ V ϕ 0 ) from water to aqueous Trisodium Citrate solutions have been calculated. The partial molar expansion coefficients $$ (\partial V_{\phi }^{0} /\partial T)_{p} $$ ( ∂ V ϕ 0 / ∂ T ) p and their second derivative $$ (\partial^{2} V_{\phi }^{0} /\partial T^{2} )_{p} $$ ( ∂ 2 V ϕ 0 / ∂ T 2 ) p have also been estimated. The partial molar isentropic compression ( $$ K_{\phi ,S}^{0} $$ K ϕ , S 0 ) and partial molar isentropic compression of transfer ( $$ \Delta K_{\phi ,S}^{0} $$ Δ K ϕ , 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.
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solute solvent interactions of mono saccharides d ribose and d xylose in aqueous Trisodium Citrate solutions at different temperatures
Journal of Molecular Liquids, 2015Co-Authors: Harsh KumarAbstract:Abstract Densities and speed of sound measurements of two mono-saccharides D(−)-ribose and D(+)-xylose have been taken in water and in aqueous Trisodium Citrate in concentration (0.2, 0.4, and 0.6) mol kg− 1 at T = (288.15, 298.15, 308.15 and 318.15) K and atmospheric pressure. Apparent molar volumes (V ϕ), apparent molar volumes at infinite dilution (Vϕ0) and corresponding transfer apparent molar volumes (ΔVϕ0), partial molar expansion coefficients (∂Vϕ0/∂T)P and their second derivative (∂2Vϕ0/∂T2)P, isentropic compression (Kϕ,S), isentropic compression at infinite dilution (Kϕ,S0), transfer apparent molar isentropic compression at infinite dilution (ΔKϕ,S0) have been calculated using experimental density and speed of sound data. The results have been discussed in terms of different types of interactions occurring in the present system.
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Solute solvent interactions of mono saccharides D(−)-ribose and D(+)-xylose in aqueous Trisodium Citrate solutions at different temperatures
Journal of Molecular Liquids, 2015Co-Authors: Harsh Kumar, SheetalAbstract:Abstract Densities and speed of sound measurements of two mono-saccharides D(−)-ribose and D(+)-xylose have been taken in water and in aqueous Trisodium Citrate in concentration (0.2, 0.4, and 0.6) mol kg− 1 at T = (288.15, 298.15, 308.15 and 318.15) K and atmospheric pressure. Apparent molar volumes (V ϕ), apparent molar volumes at infinite dilution (Vϕ0) and corresponding transfer apparent molar volumes (ΔVϕ0), partial molar expansion coefficients (∂Vϕ0/∂T)P and their second derivative (∂2Vϕ0/∂T2)P, isentropic compression (Kϕ,S), isentropic compression at infinite dilution (Kϕ,S0), transfer apparent molar isentropic compression at infinite dilution (ΔKϕ,S0) have been calculated using experimental density and speed of sound data. The results have been discussed in terms of different types of interactions occurring in the present system.
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Viscosities of Glycine, l-Alanine, and l-Valine in (0.2, 0.4, 0.6, and 0.8) mol·kg–1 Aqueous Trisodium Citrate Solutions at Different Temperatures
Journal of Chemical & Engineering Data, 2014Co-Authors: Harsh Kumar, Meenu Singla, Rajeev JindalAbstract:The viscosities, η of glycine, l-alanine, and l-valine with Trisodium Citrate (TSC) have been measured as a function of temperature at T = (288.15, 298.15, 308.15 and 318.15) K. The change in viscosity of amino acids with increase in TSC concentration and temperature is attributed to amino acids–TSC interactions. The viscosity B coefficients and viscosity interaction parameters obtained from Jones–Dole equation and transition state theory, respectively, have been discussed to interpret interactions between ions of amino acids and TSC.
Lavern M Vercaigne - One of the best experts on this subject based on the ideXlab platform.
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effectiveness of a 30 ethanol 4 Trisodium Citrate locking solution in preventing biofilm formation by organisms causing haemodialysis catheter related infections
Journal of Antimicrobial Chemotherapy, 2008Co-Authors: Teresa A Takla, Sheryl A Zelenitsky, Lavern M VercaigneAbstract:Objectives: Antibiotic locks may be used to prevent haemodialysis catheter-related infections (CRIs). This in vitro study tested the effectiveness of a novel 30% ethanol/4% Trisodium Citrate lock solution in preventing biofilm formation by the most common pathogens causing haemodialysis CRIs. Methods: Ten clinical isolates of Staphylococcus aureus, Staphylococcus epidermidis, Pseudomonas aeruginosa and Escherichia coli were tested. Bacterial suspensions of each isolate were prepared in a control solution of normal saline/Mueller‐Hinton broth (MHB) and in a lock solution of 30% ethanol/ 4% Trisodium Citrate and MHB. The bacterial suspensions were placed into the wells of a Calgary Biofilm Device (CBD) and incubated with fresh solution every 24 h for 72 h. The biofilm formation was assessed by removing the CBD pegs, placing them in normal saline and sonicating them for 5 min. The resulting solution was sampled and the colony counts were determined after 24 h of incubation. Results: All controls demonstrated biofilm growth of between 6 3 10 6 and 7.4 3 10 7 cfu/mL over 72 h. In the 30% ethanol/4% Trisodium Citrate lock solution, no biofilm growth was observed after 72 h of incubation. These results were consistent among duplicates of all isolates. Conclusions: The 30% ethanol/4% Trisodium Citrate lock solution prevented the biofilm formation of all isolates of S. aureus, S. epidermidis, P. aeruginosa and E. coli in vitro. Further studies are necessary to determine its efficacy and safety in the haemodialysis population.
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Effectiveness of a 30% ethanol/4% Trisodium Citrate locking solution in preventing biofilm formation by organisms causing haemodialysis catheter-related infections
Journal of Antimicrobial Chemotherapy, 2008Co-Authors: Teresa A Takla, Sheryl A Zelenitsky, Lavern M VercaigneAbstract:Objectives: Antibiotic locks may be used to prevent haemodialysis catheter-related infections (CRIs). This in vitro study tested the effectiveness of a novel 30% ethanol/4% Trisodium Citrate lock solution in preventing biofilm formation by the most common pathogens causing haemodialysis CRIs. Methods: Ten clinical isolates of Staphylococcus aureus, Staphylococcus epidermidis, Pseudomonas aeruginosa and Escherichia coli were tested. Bacterial suspensions of each isolate were prepared in a control solution of normal saline/Mueller‐Hinton broth (MHB) and in a lock solution of 30% ethanol/ 4% Trisodium Citrate and MHB. The bacterial suspensions were placed into the wells of a Calgary Biofilm Device (CBD) and incubated with fresh solution every 24 h for 72 h. The biofilm formation was assessed by removing the CBD pegs, placing them in normal saline and sonicating them for 5 min. The resulting solution was sampled and the colony counts were determined after 24 h of incubation. Results: All controls demonstrated biofilm growth of between 6 3 10 6 and 7.4 3 10 7 cfu/mL over 72 h. In the 30% ethanol/4% Trisodium Citrate lock solution, no biofilm growth was observed after 72 h of incubation. These results were consistent among duplicates of all isolates. Conclusions: The 30% ethanol/4% Trisodium Citrate lock solution prevented the biofilm formation of all isolates of S. aureus, S. epidermidis, P. aeruginosa and E. coli in vitro. Further studies are necessary to determine its efficacy and safety in the haemodialysis population.
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effect of an ethanol Trisodium Citrate hemodialysis catheter locking solution on isolates of candida albicans
Hemodialysis International, 2008Co-Authors: Anil R Maharaj, Sheryl A Zelenitsky, Lavern M VercaigneAbstract:We conducted an in vitro study to assess the effect of a 30% ethanol/4% Trisodium Citrate (TSC) catheter locking solution on isolates of Candida albicans. Twelve isolates obtained from human blood cultures were tested in control solutions composed of broth and normal saline, and a test solution of 30% ethanol, 4% TSC, and broth. Colony counts were determined for control and test solutions at baseline and after 1, 24, and 48 hours of exposure. After 48 hours, the remaining test solution was filtered through a sterile filter funnel and rinsed with 10 mL of sterile water. Filters were aseptically transferred to agar plates and incubated for 24 hours. Control solutions grew well over the incubation period, as expected. In contrast, no viable growth was observed in test solutions 1 hour after instillation of the ethanol/TSC locking solution, or throughout the 48-hour study duration. Additionally, filters from test solutions displayed no growth. We conclude that a 30% ethanol/4% TSC catheter locking solution eradicated all isolates of C. albicans within 1 hour of exposure in this in vitro study, and shows promise as a new hemodialysis catheter locking solution.
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Effect of an ethanol/Trisodium Citrate hemodialysis catheter locking solution on isolates of Candida albicans
Hemodialysis International, 2008Co-Authors: Anil R Maharaj, Sheryl A Zelenitsky, Lavern M VercaigneAbstract:We conducted an in vitro study to assess the effect of a 30% ethanol/4% Trisodium Citrate (TSC) catheter locking solution on isolates of Candida albicans. Twelve isolates obtained from human blood cultures were tested in control solutions composed of broth and normal saline, and a test solution of 30% ethanol, 4% TSC, and broth. Colony counts were determined for control and test solutions at baseline and after 1, 24, and 48 hours of exposure. After 48 hours, the remaining test solution was filtered through a sterile filter funnel and rinsed with 10 mL of sterile water. Filters were aseptically transferred to agar plates and incubated for 24 hours. Control solutions grew well over the incubation period, as expected. In contrast, no viable growth was observed in test solutions 1 hour after instillation of the ethanol/TSC locking solution, or throughout the 48-hour study duration. Additionally, filters from test solutions displayed no growth. We conclude that a 30% ethanol/4% TSC catheter locking solution eradicated all isolates of C. albicans within 1 hour of exposure in this in vitro study, and shows promise as a new hemodialysis catheter locking solution.
Sheryl A Zelenitsky - One of the best experts on this subject based on the ideXlab platform.
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effectiveness of a 30 ethanol 4 Trisodium Citrate locking solution in preventing biofilm formation by organisms causing haemodialysis catheter related infections
Journal of Antimicrobial Chemotherapy, 2008Co-Authors: Teresa A Takla, Sheryl A Zelenitsky, Lavern M VercaigneAbstract:Objectives: Antibiotic locks may be used to prevent haemodialysis catheter-related infections (CRIs). This in vitro study tested the effectiveness of a novel 30% ethanol/4% Trisodium Citrate lock solution in preventing biofilm formation by the most common pathogens causing haemodialysis CRIs. Methods: Ten clinical isolates of Staphylococcus aureus, Staphylococcus epidermidis, Pseudomonas aeruginosa and Escherichia coli were tested. Bacterial suspensions of each isolate were prepared in a control solution of normal saline/Mueller‐Hinton broth (MHB) and in a lock solution of 30% ethanol/ 4% Trisodium Citrate and MHB. The bacterial suspensions were placed into the wells of a Calgary Biofilm Device (CBD) and incubated with fresh solution every 24 h for 72 h. The biofilm formation was assessed by removing the CBD pegs, placing them in normal saline and sonicating them for 5 min. The resulting solution was sampled and the colony counts were determined after 24 h of incubation. Results: All controls demonstrated biofilm growth of between 6 3 10 6 and 7.4 3 10 7 cfu/mL over 72 h. In the 30% ethanol/4% Trisodium Citrate lock solution, no biofilm growth was observed after 72 h of incubation. These results were consistent among duplicates of all isolates. Conclusions: The 30% ethanol/4% Trisodium Citrate lock solution prevented the biofilm formation of all isolates of S. aureus, S. epidermidis, P. aeruginosa and E. coli in vitro. Further studies are necessary to determine its efficacy and safety in the haemodialysis population.
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Effectiveness of a 30% ethanol/4% Trisodium Citrate locking solution in preventing biofilm formation by organisms causing haemodialysis catheter-related infections
Journal of Antimicrobial Chemotherapy, 2008Co-Authors: Teresa A Takla, Sheryl A Zelenitsky, Lavern M VercaigneAbstract:Objectives: Antibiotic locks may be used to prevent haemodialysis catheter-related infections (CRIs). This in vitro study tested the effectiveness of a novel 30% ethanol/4% Trisodium Citrate lock solution in preventing biofilm formation by the most common pathogens causing haemodialysis CRIs. Methods: Ten clinical isolates of Staphylococcus aureus, Staphylococcus epidermidis, Pseudomonas aeruginosa and Escherichia coli were tested. Bacterial suspensions of each isolate were prepared in a control solution of normal saline/Mueller‐Hinton broth (MHB) and in a lock solution of 30% ethanol/ 4% Trisodium Citrate and MHB. The bacterial suspensions were placed into the wells of a Calgary Biofilm Device (CBD) and incubated with fresh solution every 24 h for 72 h. The biofilm formation was assessed by removing the CBD pegs, placing them in normal saline and sonicating them for 5 min. The resulting solution was sampled and the colony counts were determined after 24 h of incubation. Results: All controls demonstrated biofilm growth of between 6 3 10 6 and 7.4 3 10 7 cfu/mL over 72 h. In the 30% ethanol/4% Trisodium Citrate lock solution, no biofilm growth was observed after 72 h of incubation. These results were consistent among duplicates of all isolates. Conclusions: The 30% ethanol/4% Trisodium Citrate lock solution prevented the biofilm formation of all isolates of S. aureus, S. epidermidis, P. aeruginosa and E. coli in vitro. Further studies are necessary to determine its efficacy and safety in the haemodialysis population.
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effect of an ethanol Trisodium Citrate hemodialysis catheter locking solution on isolates of candida albicans
Hemodialysis International, 2008Co-Authors: Anil R Maharaj, Sheryl A Zelenitsky, Lavern M VercaigneAbstract:We conducted an in vitro study to assess the effect of a 30% ethanol/4% Trisodium Citrate (TSC) catheter locking solution on isolates of Candida albicans. Twelve isolates obtained from human blood cultures were tested in control solutions composed of broth and normal saline, and a test solution of 30% ethanol, 4% TSC, and broth. Colony counts were determined for control and test solutions at baseline and after 1, 24, and 48 hours of exposure. After 48 hours, the remaining test solution was filtered through a sterile filter funnel and rinsed with 10 mL of sterile water. Filters were aseptically transferred to agar plates and incubated for 24 hours. Control solutions grew well over the incubation period, as expected. In contrast, no viable growth was observed in test solutions 1 hour after instillation of the ethanol/TSC locking solution, or throughout the 48-hour study duration. Additionally, filters from test solutions displayed no growth. We conclude that a 30% ethanol/4% TSC catheter locking solution eradicated all isolates of C. albicans within 1 hour of exposure in this in vitro study, and shows promise as a new hemodialysis catheter locking solution.
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Effect of an ethanol/Trisodium Citrate hemodialysis catheter locking solution on isolates of Candida albicans
Hemodialysis International, 2008Co-Authors: Anil R Maharaj, Sheryl A Zelenitsky, Lavern M VercaigneAbstract:We conducted an in vitro study to assess the effect of a 30% ethanol/4% Trisodium Citrate (TSC) catheter locking solution on isolates of Candida albicans. Twelve isolates obtained from human blood cultures were tested in control solutions composed of broth and normal saline, and a test solution of 30% ethanol, 4% TSC, and broth. Colony counts were determined for control and test solutions at baseline and after 1, 24, and 48 hours of exposure. After 48 hours, the remaining test solution was filtered through a sterile filter funnel and rinsed with 10 mL of sterile water. Filters were aseptically transferred to agar plates and incubated for 24 hours. Control solutions grew well over the incubation period, as expected. In contrast, no viable growth was observed in test solutions 1 hour after instillation of the ethanol/TSC locking solution, or throughout the 48-hour study duration. Additionally, filters from test solutions displayed no growth. We conclude that a 30% ethanol/4% TSC catheter locking solution eradicated all isolates of C. albicans within 1 hour of exposure in this in vitro study, and shows promise as a new hemodialysis catheter locking solution.
Rajeev Jindal - One of the best experts on this subject based on the ideXlab platform.
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Viscosities of Glycine, l-Alanine, and l-Valine in (0.2, 0.4, 0.6, and 0.8) mol·kg–1 Aqueous Trisodium Citrate Solutions at Different Temperatures
Journal of Chemical & Engineering Data, 2014Co-Authors: Harsh Kumar, Meenu Singla, Rajeev JindalAbstract:The viscosities, η of glycine, l-alanine, and l-valine with Trisodium Citrate (TSC) have been measured as a function of temperature at T = (288.15, 298.15, 308.15 and 318.15) K. The change in viscosity of amino acids with increase in TSC concentration and temperature is attributed to amino acids–TSC interactions. The viscosity B coefficients and viscosity interaction parameters obtained from Jones–Dole equation and transition state theory, respectively, have been discussed to interpret interactions between ions of amino acids and TSC.
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viscosities of glycine l alanine and l valine in 0 2 0 4 0 6 and 0 8 mol kg 1 aqueous Trisodium Citrate solutions at different temperatures
Journal of Chemical & Engineering Data, 2014Co-Authors: Harsh Kumar, Meenu Singla, Rajeev JindalAbstract:The viscosities, η of glycine, l-alanine, and l-valine with Trisodium Citrate (TSC) have been measured as a function of temperature at T = (288.15, 298.15, 308.15 and 318.15) K. The change in viscosity of amino acids with increase in TSC concentration and temperature is attributed to amino acids–TSC interactions. The viscosity B coefficients and viscosity interaction parameters obtained from Jones–Dole equation and transition state theory, respectively, have been discussed to interpret interactions between ions of amino acids and TSC.
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interactions of glycine l alanine and l valine with aqueous solutions of Trisodium Citrate at different temperatures a volumetric and acoustic approach
The Journal of Chemical Thermodynamics, 2013Co-Authors: Harsh Kumar, Meenu Singla, Rajeev JindalAbstract:Abstract Densities, ρ , and speed of sound, u for glycine, L-alanine and L-valine in (0.2, 0.4, 0.6, and 0.8) mol · kg −1 aqueous solutions of Trisodium Citrate at 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, have been derived from density data. Experimental values of the speed of sound were used to estimate apparent molar apparent molar isentropic compression, limiting apparent molar isentropic compression, and transfer parameter. The pair and triplet interaction coefficient have been calculated from transfer parameters.
Salah Khanahmadzadeh - One of the best experts on this subject based on the ideXlab platform.
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phase equilibria volumetric and compressibility properties of tetra n butylammonium bromide Trisodium Citrate system at temperatures 298 15 k 318 15 k and atmospheric pressure
Fluid Phase Equilibria, 2016Co-Authors: Hossein Hooshyar, Rahmat Sadeghi, Salah KhanahmadzadehAbstract:Abstract Liquid−liquid equilibrium data and phase diagram corresponding to new (salt + salt) aqueous biphasic system composed of tetra-n-butylammonium bromide and Trisodium Citrate were determined by varying temperature and atmospheric pressure. The effects of temperature and salt induced on the binodals and tie-lines of the investigated ATPS were also studied. It was found that an increase in temperature caused the expansion of the two-phase region and increased the slope and the length of the tie line. In order to obtain further evidence about the salting-out effect produced by the addition of Trisodium Citrate, Na3Cit to an aqueous solution of water-miscible tetra-n-butylammonium bromide, volumetric and compressibility behavior have been measured at temperatures (298.15 K–318.15 K). The densities and speeds of sound data have been utilized to calculate apparent molar volumes, Vϕ, the apparent molar isentropic compressibility, κϕ, the values of the apparent molar quantity at infinite dilution, V ϕ ο , κ ϕ ο and partial molar characteristics include the volume and compressibility of transfer at infinite dilution, Δ t Y ϕ ο , TBAB from pure water to the aqueous salt solution.
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Phase equilibria, volumetric and compressibility properties of (tetra-n-butylammonium bromide + Trisodium Citrate) system at temperatures (298.15 K–318.15 K) and atmospheric pressure
Fluid Phase Equilibria, 2016Co-Authors: Hossein Hooshyar, Rahmat Sadeghi, Salah KhanahmadzadehAbstract:Abstract Liquid−liquid equilibrium data and phase diagram corresponding to new (salt + salt) aqueous biphasic system composed of tetra-n-butylammonium bromide and Trisodium Citrate were determined by varying temperature and atmospheric pressure. The effects of temperature and salt induced on the binodals and tie-lines of the investigated ATPS were also studied. It was found that an increase in temperature caused the expansion of the two-phase region and increased the slope and the length of the tie line. In order to obtain further evidence about the salting-out effect produced by the addition of Trisodium Citrate, Na3Cit to an aqueous solution of water-miscible tetra-n-butylammonium bromide, volumetric and compressibility behavior have been measured at temperatures (298.15 K–318.15 K). The densities and speeds of sound data have been utilized to calculate apparent molar volumes, Vϕ, the apparent molar isentropic compressibility, κϕ, the values of the apparent molar quantity at infinite dilution, V ϕ ο , κ ϕ ο and partial molar characteristics include the volume and compressibility of transfer at infinite dilution, Δ t Y ϕ ο , TBAB from pure water to the aqueous salt solution.
