The Temperature Dependence of the Properties of Electrolyte Solutions. IV. Determination of Cationic Transference Numbers in Methanol, Ethanol, Propanol, and Acetonitrile at Various Temperatures

1982 ◽  
Vol 86 (7) ◽  
pp. 636-645 ◽  
Author(s):  
J. Barthel ◽  
U. Ströder ◽  
L. Iberl ◽  
H. Hammer
Keyword(s):  
Temperature Dependence ◽  
Electrolyte Solutions ◽  
Transference Numbers

Studies with inorganic precipitate membranes: Part XIV. Evaluation of effective fixed charge densities

1977 ◽  
Vol 55 (10) ◽  
pp. 1680-1686 ◽  
Author(s):  
M. Nasim Beg ◽  
Fasih A. Siddiqi ◽  
Radhey Shyam
Keyword(s):  
Membrane Potential ◽  
Electrolyte Solutions ◽  
Fixed Charge ◽  
Transference Numbers ◽  
Supported Membranes ◽  
Nickel Sulphide ◽  
Charge Densities ◽  
Theoretical Predictions ◽  
Cobalt And Nickel

Effective fixed charge densities of cobalt and nickel sulphide (parchment supported) membranes in contact with various 1:1 electrolyte solutions have been evaluated from membrane potential measurements. The methods used for the estimation of charge densities were: (a) the Teorell–Meyer–Sievers method (TMS) and (b) the methods developed recently by Kobatake and co-workers. The two limiting forms of Kobatake's equation for dilute and concentrated solutions gave identical values of charge densities. The theoretical predictions for membrane potential were borne out quite satisfactorily by experimental results obtained with both the membranes. Apparent transference numbers of coions and permselectivities of the membranes for electrolytes have also been calculated. A method based on permselectivity values for the determination of charge density was also used. It was interesting to note that the charge densities evaluated from different methods of Kobatake and co-workers gave identical values and that the results were comparable to those derived from the TMS method.

Determination of Temperature Dependence of Kerr Constant for Nematic Liquid Crystal

2011 ◽  
Vol 544 (1) ◽  
pp. 227/[1215]-231/[1219] ◽  
Author(s):  
M. H. Majles Ara ◽  
S. H. Mousavi ◽  
M. Rafiee ◽  
M. S. Zakerhamidi
Keyword(s):  
Liquid Crystal ◽  
Temperature Dependence ◽  
Nematic Liquid Crystal ◽  
Kerr Constant

A neutron powder diffraction determination of the thermal expansion tensor of crocoite (PbCrO4) between 60 K and 290 K

1996 ◽  
Vol 60 (403) ◽  
pp. 963-972 ◽  
Author(s):  
Kevin S. Knight
Keyword(s):  
Thermal Expansion ◽  
Temperature Dependence ◽  
Powder Diffraction ◽  
Maximum Expansion ◽  
Lattice Constants ◽  
Thermal Expansion Tensor ◽  
Diffraction Determination ◽  
Line Passing ◽  
Neutron Time

AbstractThe thermal expansion tensor of crocoite has been determined from high-resolution neutron time-of-flight powder diffraction data. The temperature dependence of the lattice constants between 4.5 K and 290 K have been fitted to a quasi-harmonic Einstein model, and the temperature dependence of the thermal expansion tensor has been calculated for 60 K ≤ T ≤ 290 K. The magnitudes of the principal expansivities and their orientation exhibit saturation behaviour for temperatures above 300 K. The predicted saturated expansion coefficients are α11 = 33.1(1) × 10−6K−1, α22 = 15.72(3) × 10−6K−1, α33 = 3.36(1) × 10−6K−1, with α22 parallel to b and α11 lying at an angle of −37.86(5)° to c for the P21/n setting of the crystal structure. The direction of maximum expansion is approximately parallel to both and the least-squares line passing through the projection of the chromium atoms on (010). The direction of minimum expansion lies approximately parallel to [101]. No evidence was found for either a structural or magnetic phase transition between 4.5 K and 300 K.

Determination of Krafft point and CMC of hexadecylpyridinium salts in electrolyte solutions

1987 ◽  
Vol 120 (1) ◽  
pp. 114-117 ◽  
Author(s):  
Klaus Heckmann ◽  
Reinhard Schwarz ◽  
Jiri Strnad
Keyword(s):  
Electrolyte Solutions ◽  
Krafft Point
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