The Experts below are selected from a list of 1950 Experts worldwide ranked by ideXlab platform
Gouranga Charan Mohanty - One of the best experts on this subject based on the ideXlab platform.
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Study of molecular interaction in ternary mixture of 1,2-dichlorobenzene with (benzene + p-xylene)-linear correlation factor, excess Molar Polarization and Gibb’s free energy of mixing
The European Physical Journal D, 2013Co-Authors: Jayashree Singh, Gouranga Charan Mohanty, S. AcharyaAbstract:The relative permittivity in ternary mixture of 1,2-dichlorobenzene with (benzene + p-xylene) has been measured at frequency 455 kHz and temperature 303.16 K. The Kirkwood-Fröhlich linear correlation factor ( g ), excess Molar Polarization ( ΔP ), and Gibb’s free energy of mixing ( ΔG ) in these mixtures are calculated using the experimental values of relative permittivity on the basis of Winkelmann-Quitzsch equation. These parameters are found to be mole faction dependent indicating existence of angular correlation between the polar molecules in the non-polar solvent. The study reveals that the non-polar solvent benzene is dominant over p-xylene in the mixtures.
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Study of molecular interaction in ternary mixture of 1,2-dichlorobenzene with (benzene + p-xylene)-linear correlation factor, excess Molar Polarization and Gibb’s free energy of mixing
The European Physical Journal D, 2013Co-Authors: Jayashree Singh, Gouranga Charan Mohanty, S. AcharyaAbstract:The relative permittivity in ternary mixture of 1,2-dichlorobenzene with (benzene + p-xylene) has been measured at frequency 455 kHz and temperature 303.16 K. The Kirkwood-Frohlich linear correlation factor (g), excess Molar Polarization (ΔP), and Gibb’s free energy of mixing (ΔG) in these mixtures are calculated using the experimental values of relative permittivity on the basis of Winkelmann-Quitzsch equation. These parameters are found to be mole faction dependent indicating existence of angular correlation between the polar molecules in the non-polar solvent. The study reveals that the non-polar solvent benzene is dominant over p-xylene in the mixtures.
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study of molecular interaction in ternary mixture of 1 2 dichlorobenzene with benzene p xylene linear correlation factor excess Molar Polarization and gibb s free energy of mixing
European Physical Journal D, 2013Co-Authors: Jayashree Singh, Gouranga Charan Mohanty, S. AcharyaAbstract:The relative permittivity in ternary mixture of 1,2-dichlorobenzene with (benzene + p-xylene) has been measured at frequency 455 kHz and temperature 303.16 K. The Kirkwood-Frohlich linear correlation factor (g), excess Molar Polarization (ΔP), and Gibb’s free energy of mixing (ΔG) in these mixtures are calculated using the experimental values of relative permittivity on the basis of Winkelmann-Quitzsch equation. These parameters are found to be mole faction dependent indicating existence of angular correlation between the polar molecules in the non-polar solvent. The study reveals that the non-polar solvent benzene is dominant over p-xylene in the mixtures.
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study of molecular interaction in ternary mixture of acetylacetone haa with benzene p xylene linear correlation factor excess Molar Polarization and excess gibb s free energy of mixing
Journal of Molecular Liquids, 2004Co-Authors: S. Acharya, S. Mishra, B. Bhuyan, K. Garabadu, Gouranga Charan MohantyAbstract:Abstract The relative permittivity in the ternary mixtures of acetylacetone with (benzene+ p -xylene) has been measured at 303.16 K and frequency 455 kHz. The Kirkwood–Frohlich linear correlation factor ( g ), excess Molar Polarization (Δ P ) and excess Gibb's free energy (Δ G ) of mixing in these mixtures are calculated using the experimental value of relative permittivity on the basis of Winkelmann–Quitzsch equation. These parameters are found to be mole fraction-dependent indicating existence of angular correlation between the polar molecules in the nonpolar solvent. The study reveals that the nonpolar solvent benzene is dominant over p -xylene in the mixtures. The Redlich–Kister relation is used to estimate the ternary interaction parameters, which are in satisfactory agreement with the experimental data.
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Study of molecular interaction in ternary mixture of acetylacetone (HAA) with (benzene+p-xylene)—linear correlation factor, excess Molar Polarization and excess Gibb's free energy of mixing
Journal of Molecular Liquids, 2004Co-Authors: S. Acharya, S. Mishra, B. Bhuyan, K. Garabadu, Gouranga Charan MohantyAbstract:Abstract The relative permittivity in the ternary mixtures of acetylacetone with (benzene+ p -xylene) has been measured at 303.16 K and frequency 455 kHz. The Kirkwood–Frohlich linear correlation factor ( g ), excess Molar Polarization (Δ P ) and excess Gibb's free energy (Δ G ) of mixing in these mixtures are calculated using the experimental value of relative permittivity on the basis of Winkelmann–Quitzsch equation. These parameters are found to be mole fraction-dependent indicating existence of angular correlation between the polar molecules in the nonpolar solvent. The study reveals that the nonpolar solvent benzene is dominant over p -xylene in the mixtures. The Redlich–Kister relation is used to estimate the ternary interaction parameters, which are in satisfactory agreement with the experimental data.
S. Acharya - One of the best experts on this subject based on the ideXlab platform.
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Study of molecular interaction in ternary mixture of 1,2-dichlorobenzene with (benzene + p-xylene)-linear correlation factor, excess Molar Polarization and Gibb’s free energy of mixing
The European Physical Journal D, 2013Co-Authors: Jayashree Singh, Gouranga Charan Mohanty, S. AcharyaAbstract:The relative permittivity in ternary mixture of 1,2-dichlorobenzene with (benzene + p-xylene) has been measured at frequency 455 kHz and temperature 303.16 K. The Kirkwood-Fröhlich linear correlation factor ( g ), excess Molar Polarization ( ΔP ), and Gibb’s free energy of mixing ( ΔG ) in these mixtures are calculated using the experimental values of relative permittivity on the basis of Winkelmann-Quitzsch equation. These parameters are found to be mole faction dependent indicating existence of angular correlation between the polar molecules in the non-polar solvent. The study reveals that the non-polar solvent benzene is dominant over p-xylene in the mixtures.
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Study of molecular interaction in ternary mixture of 1,2-dichlorobenzene with (benzene + p-xylene)-linear correlation factor, excess Molar Polarization and Gibb’s free energy of mixing
The European Physical Journal D, 2013Co-Authors: Jayashree Singh, Gouranga Charan Mohanty, S. AcharyaAbstract:The relative permittivity in ternary mixture of 1,2-dichlorobenzene with (benzene + p-xylene) has been measured at frequency 455 kHz and temperature 303.16 K. The Kirkwood-Frohlich linear correlation factor (g), excess Molar Polarization (ΔP), and Gibb’s free energy of mixing (ΔG) in these mixtures are calculated using the experimental values of relative permittivity on the basis of Winkelmann-Quitzsch equation. These parameters are found to be mole faction dependent indicating existence of angular correlation between the polar molecules in the non-polar solvent. The study reveals that the non-polar solvent benzene is dominant over p-xylene in the mixtures.
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study of molecular interaction in ternary mixture of 1 2 dichlorobenzene with benzene p xylene linear correlation factor excess Molar Polarization and gibb s free energy of mixing
European Physical Journal D, 2013Co-Authors: Jayashree Singh, Gouranga Charan Mohanty, S. AcharyaAbstract:The relative permittivity in ternary mixture of 1,2-dichlorobenzene with (benzene + p-xylene) has been measured at frequency 455 kHz and temperature 303.16 K. The Kirkwood-Frohlich linear correlation factor (g), excess Molar Polarization (ΔP), and Gibb’s free energy of mixing (ΔG) in these mixtures are calculated using the experimental values of relative permittivity on the basis of Winkelmann-Quitzsch equation. These parameters are found to be mole faction dependent indicating existence of angular correlation between the polar molecules in the non-polar solvent. The study reveals that the non-polar solvent benzene is dominant over p-xylene in the mixtures.
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study of molecular interaction in ternary mixture of acetylacetone haa with benzene p xylene linear correlation factor excess Molar Polarization and excess gibb s free energy of mixing
Journal of Molecular Liquids, 2004Co-Authors: S. Acharya, S. Mishra, B. Bhuyan, K. Garabadu, Gouranga Charan MohantyAbstract:Abstract The relative permittivity in the ternary mixtures of acetylacetone with (benzene+ p -xylene) has been measured at 303.16 K and frequency 455 kHz. The Kirkwood–Frohlich linear correlation factor ( g ), excess Molar Polarization (Δ P ) and excess Gibb's free energy (Δ G ) of mixing in these mixtures are calculated using the experimental value of relative permittivity on the basis of Winkelmann–Quitzsch equation. These parameters are found to be mole fraction-dependent indicating existence of angular correlation between the polar molecules in the nonpolar solvent. The study reveals that the nonpolar solvent benzene is dominant over p -xylene in the mixtures. The Redlich–Kister relation is used to estimate the ternary interaction parameters, which are in satisfactory agreement with the experimental data.
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Study of molecular interaction in ternary mixture of acetylacetone (HAA) with (benzene+p-xylene)—linear correlation factor, excess Molar Polarization and excess Gibb's free energy of mixing
Journal of Molecular Liquids, 2004Co-Authors: S. Acharya, S. Mishra, B. Bhuyan, K. Garabadu, Gouranga Charan MohantyAbstract:Abstract The relative permittivity in the ternary mixtures of acetylacetone with (benzene+ p -xylene) has been measured at 303.16 K and frequency 455 kHz. The Kirkwood–Frohlich linear correlation factor ( g ), excess Molar Polarization (Δ P ) and excess Gibb's free energy (Δ G ) of mixing in these mixtures are calculated using the experimental value of relative permittivity on the basis of Winkelmann–Quitzsch equation. These parameters are found to be mole fraction-dependent indicating existence of angular correlation between the polar molecules in the nonpolar solvent. The study reveals that the nonpolar solvent benzene is dominant over p -xylene in the mixtures. The Redlich–Kister relation is used to estimate the ternary interaction parameters, which are in satisfactory agreement with the experimental data.
Georgios Ritzoulis - One of the best experts on this subject based on the ideXlab platform.
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Densities, Relative Permittivities, and Refractive Indices of the Binary Systems Propylene Carbonate + o-Xylene and Propylene Carbonate + m-Xylene at (15, 20, 25, 30, and 35) °C
Journal of Chemical & Engineering Data, 2000Co-Authors: Georgios Moumouzias, Georgios RitzoulisAbstract:Densities, relative permittivities, and refractive indices were measured at (15, 20, 25, 30, and 35) °C, over the whole composition range of the binary mixtures propylene carbonate + o-xylene and propylene carbonate + m-xylene. Excess volumes were found to be negative, and the values were fitted to a Redlich−Kister type equation. Apparent dipole moments were calculated, as well as deviations in relative permittivity, Molar refraction, and Molar Polarization.
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Relative Permittivities and Refractive Indices of γ-Butyrolactone with o-Xylene and m-Xylene
Journal of Chemical & Engineering Data, 1999Co-Authors: Georgios Moumouzias, Georgios RitzoulisAbstract:Relative permittivities and refractive indices of the binary systems γ-butyrolactone + o-xylene and γ-butyrolactone + m-xylene were measured at (288.15, 293.15, 298.15, 303.15, and 308.15) K. Deviations in relative permittivity, refractive index, Molar refraction, and Molar Polarization were calculated according to several mixing rules. Calculations of apparent dipole moment and dipole moment of the pure liquids were also performed.
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A Study on Excess Volumes and Dielectric Properties in the γ-Butyrolactone + p-Xylene System at Various Temperatures
Journal of Chemical & Engineering Data, 1998Co-Authors: Thalia Avraam, Georgios Moumouzias, Georgios RitzoulisAbstract:Densities, relative permittivities, and refractive indices were measured for the binary mixture γ-butyrolactone + p-xylene from 288.15 K to 308.15 K. The above quantities are represented with polynomial smoothing curves. Excess volumes, as well as deviations of Molar Polarization, were calculated and found to be negative, with a minimum at mole fraction 0.5. The Kirkwood correlation factor was also calculated.
Earle Stellwagen - One of the best experts on this subject based on the ideXlab platform.
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the sensitivity of the cis trans isomerization of enalapril and enalaprilat to solvent conditions
Journal of Pharmacy and Pharmacology, 2005Co-Authors: Robin Ledger, Earle StellwagenAbstract:The cis- and trans-isomers of enalapril and enalaprilat can be resolved by HPLC and by capillary electrophoresis. The isomeric content of enalapril is perturbed by the ionization of both its carboxyl and amine groups, while the isomeric content of enalaprilat is only perturbed by the ionization of its amine group. Increasing the hydrophobicity of the analyte solvent, as reflected in its Molar Polarization, increases the Z (cis) content of enalapril and markedly decreases the kinetics for isomerization. Far UV circular dichroic measurements suggest that the increase in Z (cis) content of enalapril is due to protonation of its carboxylate group. Taken together, the in-vitro properties of enalapril and enalaprilat suggest that the in-vivo transformation of the prodrug enalapril to the inhibitor enalaprilat and its delivery to angiotensin-converting enzyme should not be significantly limited by cis/trans-isomerization.
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The sensitivity of the cis/trans-isomerization of enalapril and enalaprilat to solvent conditions.
Journal of Pharmacy and Pharmacology, 2005Co-Authors: Robin Ledger, Earle StellwagenAbstract:The cis- and trans-isomers of enalapril and enalaprilat can be resolved by HPLC and by capillary electrophoresis. The isomeric content of enalapril is perturbed by the ionization of both its carboxyl and amine groups, while the isomeric content of enalaprilat is only perturbed by the ionization of its amine group. Increasing the hydrophobicity of the analyte solvent, as reflected in its Molar Polarization, increases the Z (cis) content of enalapril and markedly decreases the kinetics for isomerization. Far UV circular dichroic measurements suggest that the increase in Z (cis) content of enalapril is due to protonation of its carboxylate group. Taken together, the in-vitro properties of enalapril and enalaprilat suggest that the in-vivo transformation of the prodrug enalapril to the inhibitor enalaprilat and its delivery to angiotensin-converting enzyme should not be significantly limited by cis/trans-isomerization.
N V Sastry - One of the best experts on this subject based on the ideXlab platform.
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excess Molar volumes excess isentropic compressibilities excess viscosities relative permittivity and Molar Polarization deviations for methyl acetate ethyl acetate butyl acetate isoamyl acetate methyl propionate ethyl propionate ethyl butyrate methy
Journal of Molecular Liquids, 2013Co-Authors: N V Sastry, Sunil R Patel, Saurabh S SoniAbstract:Abstract Experimental densities, dynamic viscosities, speeds of sound and relative permittivities for ten binary mixtures of methyl acetate +, ethyl acetate +, butyl acetate +, isoamyl acetate +, methyl propionate +, ethyl propionate +, ethyl butyrate +, methyl methacrylate +, ethyl methacrylate +, and butyl methacrylate + cyclohexane at T = 298.15 and 303.15 K have been measured. Applicability of Grunberg–Nissan, McAllister and Auslander equations was tested for correlating viscosity of mixtures. The suitability of free length and collision factor theories, and Nomoto and Junjie equations for predicting the speeds of sound in binary mixtures have been explored. Excess Molar volumes, excess isentropic compressibilities, excess viscosities, relative permittivity and Molar Polarization deviations have been calculated and their compositional variation has been mathematically expressed by Redlich–Kister equation. The analysis of excess and deviation functions has been done to ascertain the predominant type of interactions in the bulk state of mixtures.
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Excess volumes, relative permittivity increments, and excess Molar Polarizations of { x CH2CCH3CO2CH3+ (1 − x) ( C6H6, or C7H8, or o -C8H10, or m -C8H10, or p - C8H10, or C8H10, or c -C6H12)}
The Journal of Chemical Thermodynamics, 1999Co-Authors: N V Sastry, S.r. Patel, M.c. PatelAbstract:Abstract The excess Molar volumes VmE, relative permittivity increments δϵr, and excess Molar Polarization PmEof { x CH2CCH3CO2CH3+ (1 − x) ( C6H6, or C7H8, or o -C8H10, or m -C8H10, or p - C8H10, or C8H10, or c -C6H12)} have been measured at the temperatures 298.15 K and 308.15 K. The results for VmE, δϵr, and PmEindicate that structure-disruptive interactions between the acrylic ester and hydrocarbons predominate over the specific interactions and contribute to the sign and magnitude of the individual excess functions.
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Densities, Speeds of Sound, Viscosities, and Relative Permittivities for 1-Propanol + and 1-Butanol + Heptane at 298.15 K and 308.15 K
Journal of Chemical & Engineering Data, 1996Co-Authors: N V Sastry, Mahendra K. ValandAbstract:The densities, speeds of sound, viscosities, and relative permittivities for the binary mixtures of 1-propanol + and 1-butanol + heptane at 298.15 K and 308.15 K are reported. The excess volumes VE, isentropic compressibilities , viscosity deviations, δη, relative permittivity deviations δe, and Molar Polarization deviations, δPm were calculated from the experimental results.