scholarly journals A computational approach to calculate the heat of transport of aqueous solutions

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Silvia Di Lecce ◽  
Tim Albrecht ◽  
Fernando Bresme
Keyword(s):  
Aqueous Solutions ◽  
Computational Approach ◽  
Heat Of Transport

Heat of transport and heat capacity of transport of some aqueous electrolytes

1988 ◽  
Vol 66 (3) ◽  
pp. 435-438
Author(s):  
S. K. Sanyal ◽  
Ashis K. Mukherjee
Keyword(s):  
Heat Capacity ◽  
Aqueous Solutions ◽  
Thermal Diffusion ◽  
Aqueous Electrolytes ◽  
Heat Of Transport ◽  
Sintered Glass ◽  
A Cell ◽  
Glass Diaphragm

The thermal diffusion of aqueous solutions of NaCl, KCl, MgCl2, BaCl2, MgSO4, and CuSO4 (0.05 m) contained in the pores of a sintered glass diaphragm has been studied. A cell is designed and fabricated for this purpose, and the resulting heat of transport values are compared with those available from the literature and obtained by using independent techniques.

Thermal diffusion of aqueous alcohols

1989 ◽  
Vol 67 (5) ◽  
pp. 867-870
Author(s):  
Ashis Kumar Mukherjee ◽  
S. K. Sanyal
Keyword(s):  
Aqueous Solutions ◽  
Temperature Coefficient ◽  
Thermal Diffusion ◽  
Soret Coefficient ◽  
Local Entropy ◽  
Solvent Interactions ◽  
Solvent Water ◽  
Heat Of Transport ◽  
Sintered Glass ◽  
Experimental Values

The thermal diffusion of aqueous solutions of methanol, ethanol, propan-1-ol, butan-1-ol, ethan-1,2-diol, andpropan-1,2-diol contained in the pores of a sintered glass disc (of porosity G4) has been studied. The Soret coefficient (σ) and the heat of transport [Formula: see text] values are reported in the temperature range of 25–40 °C. The heat capacities of transport are ascertained at 30 °C from the temperature coefficient of heat of transport values. The results are explained on the basis of changes in local entropy in the solvent (water), arising out of solute–solvent interactions. Correlations of the observed experimental values with certain relevant thermodynamic parameters, taken from the literature, have also been sought, with encouraging results. Keywords: thermal diffusion, heat of transport, entropy of hydration.

Heats of transport of some aqueous nonelectrolytes

1986 ◽  
Vol 64 (4) ◽  
pp. 717-719
Author(s):  
A. K. Murkherjee ◽  
S. K. Sanyal
Keyword(s):  
Temperature Gradient ◽  
Aqueous Solutions ◽  
Thermal Diffusion ◽  
Hydrophobic Hydration ◽  
Heat Of Transport ◽  
Sintered Glass ◽  
Glass Disc

The thermal diffusion of aqueous solutions of glucose, sucrose, ethylacetate, and 1,4-dioxan (0.1 m) contained in the pores of a sintered glass disc (or porosity G4), which is subjected to a temperature gradient, has been studied. The resulting heat of transport data have been interpreted, in terms of local changes in entropy in the solvent brought forth by the presence of the solutes, and correlated to the hydrophobic hydration effects.

Ultrathin frozen sections of yeast without aldehyde prefixation

1978 ◽  
Vol 36 (2) ◽  
pp. 58-59
Author(s):  
K. J. Böhm ◽  
a. E. Unger
Keyword(s):  
Aqueous Solutions ◽  
Biological Material ◽  
Yeast Cells ◽  
Frozen Sections ◽  
Good Preservation ◽  
Ultrathin Frozen Sections

During the last years it was shown that also by means of cryo-ultra-microtomy a good preservation of substructural details of biological material was possible. However the specimen generally was prefixed in these cases with aldehydes.Preparing ultrathin frozen sections of chemically non-prefixed material commonly was linked up to considerable technical and manual expense and the results were not always satisfying. Furthermore, it seems to be impossible to carry out cytochemical investigations by means of treating sections of unfixed biological material with aqueous solutions.We therefore tried to overcome these difficulties by preparing yeast cells (S. cerevisiae) in the following manner:

Application of Modified Bloch Waves to Image Analysis of Extended Linear Defects

1974 ◽  
Vol 32 ◽  
pp. 402-403
Author(s):  
S. Nakahara ◽  
D. M. Maher
Keyword(s):  
Image Analysis ◽  
Computational Approach ◽  
Dislocation Loops ◽  
Plane Wave Expansion ◽  
Dynamical Equations ◽  
Bloch Waves ◽  
Linear Defects ◽  
Imperfect Crystal ◽  
Localized Defects ◽  
Defective Crystals

Since Head first demonstrated the advantages of computer displayed theoretical intensities from defective crystals, computer display techniques have become important in image analysis. However the computational methods employed resort largely to numerical integration of the dynamical equations of electron diffraction. As a consequence, the interpretation of the results in terms of the defect displacement field and diffracting variables is difficult to follow in detail. In contrast to this type of computational approach which is based on a plane-wave expansion of the excited waves within the crystal (i.e. Darwin representation ), Wilkens assumed scattering of modified Bloch waves by an imperfect crystal. For localized defects, the wave amplitudes can be described analytically and this formulation has been used successfully to predict the black-white symmetry of images arising from small dislocation loops.

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