The Experts below are selected from a list of 84 Experts worldwide ranked by ideXlab platform

A. Jamnik - One of the best experts on this subject based on the ideXlab platform.

  • Spatial correlations and Solvation Interaction in a two‐component mixture of adhesive fluids
    The Journal of Chemical Physics, 1996
    Co-Authors: A. Jamnik
    Abstract:

    First, the phase behavior and the spatial correlations in the two‐component mixture of adhesive fluids denoted by (1) and (2) are studied on the basis of the solution to the Percus–Yevick/Ornstein–Zernike equation. The isotherm slopes for the correlation function between unlike particles exhibit singularities at the interparticle distances which are the multiple of the molecular size of both species (1) and (2) as a consequence of the impulse character of 1‐1, 2‐2, and 1‐2 adhesive potential of Interaction. Then, the above system is treated as an adhesive solvent mixture in which the solvent mediated force between the hard solutes (3) mimicking liophobic colloids is studied. The solution of the Percus–Yevick/Ornstein–Zernike equation for a three‐component mixture comprising the two‐component adhesive solvent system and the hard sphere colloid is applied in the limit of vanishing solute concentration. Due to the layering of the solvent molecules, the Solvation force oscillates with the periods equal to the...

  • spatial correlations and Solvation Interaction in a two component mixture of adhesive fluids
    Journal of Chemical Physics, 1996
    Co-Authors: A. Jamnik
    Abstract:

    First, the phase behavior and the spatial correlations in the two‐component mixture of adhesive fluids denoted by (1) and (2) are studied on the basis of the solution to the Percus–Yevick/Ornstein–Zernike equation. The isotherm slopes for the correlation function between unlike particles exhibit singularities at the interparticle distances which are the multiple of the molecular size of both species (1) and (2) as a consequence of the impulse character of 1‐1, 2‐2, and 1‐2 adhesive potential of Interaction. Then, the above system is treated as an adhesive solvent mixture in which the solvent mediated force between the hard solutes (3) mimicking liophobic colloids is studied. The solution of the Percus–Yevick/Ornstein–Zernike equation for a three‐component mixture comprising the two‐component adhesive solvent system and the hard sphere colloid is applied in the limit of vanishing solute concentration. Due to the layering of the solvent molecules, the Solvation force oscillates with the periods equal to the...

Jin-ming Lin - One of the best experts on this subject based on the ideXlab platform.

  • Separation and determination of phospholipids in plant seeds by nonaqueous capillary electrophoresis
    Journal of Chromatography A, 2005
    Co-Authors: Baoyuan Guo, Bei Wen, Xiao-quan Shan, Shu-zheng Zhang, Jin-ming Lin
    Abstract:

    A method has been developed for the separation and determination of phospholipids by nonaqueous capillary electrophoresis in a separation medium of acetonitrile-2-proponol (3:2, v/v), 0.3% acetic acid and 60 mM ammonium acetate. To optimize the separation conditions, the composition of separation medium including alcohols, acetic acid, n-hexane and ammonium acetate was studied. The Solvation Interaction and ion-dipole Interaction were also investigated. The contents of phospholipids in soybean, sunflower, peanut, apricot kernel, filbert and walnut were determined by the recommended method. The results obtained by the nonaqueous capillary electrophoreses were in good agreement with those determined by micellar electrokinetic chromatography.

Sanjib Bagchi - One of the best experts on this subject based on the ideXlab platform.

  • study of solute solvent and solvent solvent Interactions in pure and mixed binary solvents
    Journal of Molecular Liquids, 2008
    Co-Authors: Angshuman Maitra, Sanjib Bagchi
    Abstract:

    Abstract Solute–solvent and solvent–solvent Interactions have been studied in fifteen pure solvents and seven binary aqueous mixtures by monitoring the solubility of a dye in the solvents. The standard Gibbs energy of Solvation, as given by log s , where s is the solubility has been found to depend on various modes of solute–solvent Interaction and also on the Hildebrand solubility parameter representing the cohesive energy density (solvent–solvent Interaction) of solvent. In all the binary mixtures the value of log s has been found to deviate from the average of log s values in component pure solvents weighted with respect to their mole fractions. A dimensionless quantity has been defined to represent the deviation of the observed log s values from the mole fraction average. Results have been explained in terms of various modes of Solvation Interaction.

  • Study of Solvation Interaction in ethanol + octan-1-ol mixture
    Journal of the Indian Chemical Society, 2003
    Co-Authors: Ramkrishna Pramanik, Sanjib Bagchi
    Abstract:

    Solvation characteristic of 2,6-diphenyl-4-(2,4,6-triphenyl)-1-pyridinium phenolate, the indicator solute for the E T (30) scale of solvent polarity, has been studied as a function of solvent composition in the temperature range 293-313 K by monitoring the solvatochromic charge transfer band of the solute. The results, indicating preferential Solvation of the solute by ethanol, have been analyzed in terms of a suitable model to get information about solute-solvent and solvent-solvent Interaction. Viscosity and density of the solvent mixture as a function of solvent composition have been determined in the temperature range 283-313 K and the extent of non-ideality has also been estimated. It appears that the two procedures provide similar information about the nature of mutual Interaction between the solvent molecules.

  • Studies on Solvation Interaction: Solubility of a betaine dye and a ketocyanine dye in homogeneous and heterogeneous media
    Indian journal of chemistry. Sect. A: Inorganic physical theoretical & analytical, 2002
    Co-Authors: Ramkrishna Pramanik, Sanjib Bagchi
    Abstract:

    Solubility of 2,6-diphenyl-4-(2,4,6-triphenylpyridinium-1-yl) phenolate, commonly known as Reichardt's betaine dye and a ketocyanine dye has been determined in binary solvent mixtures and in cationic and anionic micellar media. In all the binary mixtures the standard molar free energy of solution, as given by log s 1 2 where s 1 2 is the solubility in the binary mixture, cannot be represented by the average of log s values in pure solvents weighted with respect to mole fraction of the components. The deviation from the mole fraction average value, as given by A (log s)=log s 1 2 -(x 1 log s 1 +x 2 log s 2 ), has been calculated and compared with the similar parameter as obtained from the electronic spectroscopic transition energy. The results have been explained in terms of solute-solvent and solvent-solvent Interaction. Study in micellar media provides information regarding the location of the dye in the heterogeneous media.

  • am1 semiempirical mo calculation of specific Solvation Interaction a scale for hydrogen bond donation ability of solvents
    Journal of Molecular Structure-theochem, 1995
    Co-Authors: Debashis Banerjee, Asit Kumar Chandra, Manas Banerjee, Sanjib Bagchi
    Abstract:

    Abstract Semiempirical molecular orbital calculations at the AM1 level have been carried out to obtain specific Solvation Interaction energies involving hydrogen bonding for various solute-protic solvent systems. A scale for hydrogen bond donating ability of the protic solvents is proposed. A comparison of the calculated parameters with solvatochromic parameters is presented.

Baoyuan Guo - One of the best experts on this subject based on the ideXlab platform.

  • Separation and determination of phospholipids in plant seeds by nonaqueous capillary electrophoresis
    Journal of Chromatography A, 2005
    Co-Authors: Baoyuan Guo, Bei Wen, Xiao-quan Shan, Shu-zheng Zhang, Jin-ming Lin
    Abstract:

    A method has been developed for the separation and determination of phospholipids by nonaqueous capillary electrophoresis in a separation medium of acetonitrile-2-proponol (3:2, v/v), 0.3% acetic acid and 60 mM ammonium acetate. To optimize the separation conditions, the composition of separation medium including alcohols, acetic acid, n-hexane and ammonium acetate was studied. The Solvation Interaction and ion-dipole Interaction were also investigated. The contents of phospholipids in soybean, sunflower, peanut, apricot kernel, filbert and walnut were determined by the recommended method. The results obtained by the nonaqueous capillary electrophoreses were in good agreement with those determined by micellar electrokinetic chromatography.

Shu-zheng Zhang - One of the best experts on this subject based on the ideXlab platform.

  • Separation and determination of phospholipids in plant seeds by nonaqueous capillary electrophoresis
    Journal of Chromatography A, 2005
    Co-Authors: Baoyuan Guo, Bei Wen, Xiao-quan Shan, Shu-zheng Zhang, Jin-ming Lin
    Abstract:

    A method has been developed for the separation and determination of phospholipids by nonaqueous capillary electrophoresis in a separation medium of acetonitrile-2-proponol (3:2, v/v), 0.3% acetic acid and 60 mM ammonium acetate. To optimize the separation conditions, the composition of separation medium including alcohols, acetic acid, n-hexane and ammonium acetate was studied. The Solvation Interaction and ion-dipole Interaction were also investigated. The contents of phospholipids in soybean, sunflower, peanut, apricot kernel, filbert and walnut were determined by the recommended method. The results obtained by the nonaqueous capillary electrophoreses were in good agreement with those determined by micellar electrokinetic chromatography.