Transport coefficients of oligo- and poly(dimethylsiloxanes) in dilute solutions. The draining effect

1993 ◽  
Vol 26 (10) ◽  
pp. 2566-2574 ◽  
Author(s):  
Takeshi Yamada ◽  
Hitoshi Koyama ◽  
Takenao Yoshizaki ◽  
Yoshiyuki Einaga ◽  
Hiromi Yamakawa
Keyword(s):  
Transport Coefficients ◽  
Dilute Solutions

Multicomponent diffusion in dilute solutions of mixed electrolytes

1980 ◽  
Vol 33 (9) ◽  
pp. 1869 ◽  
Author(s):  
DG Leaist ◽  
PA Lyons
Keyword(s):  
Diffusion Coefficients ◽  
Transport Coefficients ◽  
Ionic Conductivities ◽  
Multicomponent Diffusion ◽  
Mixed Electrolytes ◽  
Dilute Solutions ◽  
Ternary Diffusion ◽  
Mixed Electrolyte ◽  
Coupled Diffusion ◽  
Phenomenological Coefficients

The Onsager-Fuoss theory of ion transport can be used to study multicomponent diffusion in dilute solutions of mixed electrolytes. Precise Lij phenomenological coefficients can be calculated from a knowledge of the solvent properties and limiting ionic conductivities. If activity coefficients for dilute mixed electrolyte systems are available, precise multicomponent diffusion coefficients can also be calculated. Explicit equations are given for calculating both sets of transport coefficients. The equations apply to systems containing an arbitrary number of strong electrolytes and are valid at low total salt concentrations. To illustrate the use of the equations, ternary diffusion in a few aqueous systems is examined in detail. Aqueous mixed electrolyte systems containing H+ exhibit strongly coupled diffusion and highly variable diffusion coefficients. A modified Harned conductimetric experiment is described for the determination of ternary diffusion coefficients in dilute solutions. Results for the system HCl- KCl-H2O are in good agreement with theoretical predictions.

Infrared absorptions and band widths of dilute solutions of CF3H in liquid Ar, N2, and Xe

1999 ◽  
Vol 96 (12) ◽  
pp. 1745-1755
Author(s):  
DAVID L. CEDENO, JINGPING PENG, DOVIE REY
Keyword(s):  
Dilute Solutions

TRANSPORT COEFFICIENTS IN F-S THEORY

1974 ◽  
Author(s):  
D. Bolmont ◽  
J. Salmon ◽  
M. Valton
Keyword(s):  
Transport Coefficients

Molecular Transformations in DNA under the Influence of UV-radiation

2020 ◽  
Vol 04 ◽  
Author(s):  
Vigen G. Barkhudaryan ◽  
Gayane V. Ananyan ◽  
Nelli H. Karapetyan
Keyword(s):  
Uv Radiation ◽  
Uv Irradiation ◽  
Absorption Spectroscopy ◽  
Calf Thymus Dna ◽  
Dilute Solutions ◽  
Concentrated Solutions ◽  
Buffer Solution ◽  
Low Concentration ◽  
Calf Thymus ◽  
Dna Solutions

Background: The processes of destruction and crosslinking of macromolecules occur simultaneously under the influence of ultraviolet (UV) radiation in synthetic polymers, dry DNA and their concentrated solutions. Objective: The effect of UV radiation on calf thymus DNA in dilute solutions subjected to UV- irradiation was studied in this work. Method: The calf thymus DNA was studied in dilute solutions using viscometry, absorption spectroscopy and electrophoresis. Results: It was shown, that at a low concentration of DNA in the buffer solution ([DNA] = 85 μg / ml) under the influence of UV radiation, the processes of destruction of macromolecules and an increase in their flexibility predominate, which is accompanied by a gradual decrease in the viscosity of their solution. In addition, due to the low concentration of the solution, intramolecular crosslinking of macromolecules predominates, which also reduces their size and, consequently, the viscosity of the solution. Conclusion: It was concluded, that in dilute DNA solutions, due to the predominance of the processes of intramolecular crosslinking of macromolecules over intermolecular, only constant processes of decreasing the sizes of DNA macromolecules occur. As a result, its solubility remains virtually unchanged during UV irradiation. The described comments are also excellently confirmed by the results of absorption spectroscopy and electrophoresis

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