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Acta Crystallographica Section B Structural Science, 1990
On the basis of test calculations, Kundrot & Richards [Acta Cryst. (1987), B43, 544-547] suggest that for models of protein crystal structures based on limited-resolution X-ray data, it is not appropriate to vary both the occupany (Q) and thermal (B) parameters for the solvent molecules during refinement.
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On the basis of test calculations, Kundrot & Richards [Acta Cryst. (1987), B43, 544-547] suggest that for models of protein crystal structures based on limited-resolution X-ray data, it is not appropriate to vary both the occupany (Q) and thermal (B) parameters for the solvent molecules during refinement.
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Journal of Polymer Engineering, 2012
Abstract Sensitivity analysis of free-volume theory parameters have been done in ternary polymer-solvent-solvent systems. Two ternary polymer-solvent-solvent systems have been studied: poly(styrene)-tetrahydrofuran-p-xylene and poly(methyl methacrylate)-ethylbenzene-tetrahydrofuran systems.
Raj Kumar Arya, Madhu Vinjamur
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Abstract Sensitivity analysis of free-volume theory parameters have been done in ternary polymer-solvent-solvent systems. Two ternary polymer-solvent-solvent systems have been studied: poly(styrene)-tetrahydrofuran-p-xylene and poly(methyl methacrylate)-ethylbenzene-tetrahydrofuran systems.
Raj Kumar Arya, Madhu Vinjamur
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Solubility parameters from maxima in solubility/solvent plots
International Journal of Pharmaceutics, 1980Abstract Solubility data of a substance in solvents with known solubility parameters have been used graphically in the past to determine the solubility parameter of the solute. A multiple regression method of handling this is presented. It gives rise to self-consistent solubility parameters, but the solvent molar volumes calculated are anomalous ...
Guy Cavé +4 more
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Empirical Parameters of the Polarity of Solvents
Angewandte Chemie International Edition in English, 1965AbstractThe empirical parameters of the polarity of solvents which have been determined recently are reviewed: Y‐values (Winstein, Grunwald), X‐values (Gielen, Nasielski), Ω‐values (Berson, Hamlet, Mueller), Z‐values (Kosower), ET‐values (Dimroth, Reichardt, Siepmann, Bohlmann), R‐ and S‐values (Brownstein).
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Journal of the Chemical Society, Faraday Transactions, 1990
It is proposed that the ratio µ2/V, from electrostatic solvation theory, be used to designate solvent polarity; µ is the dipole moment and V the molar volume. The 101 solvents analysed can be divided into four classes (and two subclasses) by means of the correlation between the dielectric β parameter (proportional to µ2/V) and the empirical solvent ...
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It is proposed that the ratio µ2/V, from electrostatic solvation theory, be used to designate solvent polarity; µ is the dipole moment and V the molar volume. The 101 solvents analysed can be divided into four classes (and two subclasses) by means of the correlation between the dielectric β parameter (proportional to µ2/V) and the empirical solvent ...
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Two-parameter scaling for polymers in Θ solvents
Macromolecules, 1990We revive an old conjecture that a fixed number of binary contacts between chains collec- tively make up the topological constraint commonly referred to as an entanglement. This leads us to a general scaling theory for semidilute polymer solutions which involves two length scales, the screening length ( and the tube diameter a.
Ralph H. Colby, Michael Rubinstein
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Empirical polarity parameters for some binary solvent mixtures
Australian Journal of Chemistry, 1981Values of the empirical solvent polarity parameters E T and Z have been determined as a function of composition for the binary solvent systems 1,2-dibromoethane + 1,2-dibromopropane, acetone + chloroform, acetone + ethanol, ethanol + chloroform and acetone + dichloromethane.
S Balakrishnan, AJ Easteal
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The g interaction parameter of polymer-solvent systems
Macromolecules, 1986Calcul pour 41 systemes polymere-solvant.
Rosa M. Masegosa +2 more
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Solute-solvent interaction parameters by gas chromatography.
Journal of chromatography. A, 2005Gas-liquid distribution coefficients at ideal dilution in non-volatile solvents can be measured by gas chromatography. The numerical value of a coefficient depends on the choice of the concentration unit in the solvent and in the gas phase. The relationships between different coefficients characterizing gas-liquid equilibria are discussed and ...
Ervin sz, Kováts +2 more
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Relationship between Hansen Solubility Parameters and Lewis Acid‐Base Parameters of Solvents
Journal of Macromolecular Science, Part B, 2007Hansen solubility parameters and Lewis acid–base parameters are two groups of parameters which are used to characterize solvents, polymers, and the interactions between polymer matrix and additives. Although their definitions are very different, they can well explain the interactions in polymer composites. Therefore, some relations should exist between
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