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Theory of dipolar relaxation in aqueous macromolecular solutions

✍ Scribed by G. P. South; E. H. Grant

Publisher
Wiley (John Wiley & Sons)
Year
1974
Tongue
English
Weight
575 KB
Volume
13
Category
Article
ISSN
0006-3525

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✦ Synopsis

Abstract

Recent advances in dielectric theory are applied to two models representing an aqueous solution of dipolar macromolecules. In one model the water is treated as a dielectric continuum and the macromolecule as a finite‐sized sphere; in the other both components are represented as point dipoles suspended in a background dielectric. The predicted frequency dependences of the complex permittivity in these two cases agree and the validity of the dielectric technique for estimating macromolecular size and shape is established. The model in which water is treated as a dielectric continuum predicts a larger dielectric dispersion in the radio frequency region, which is consistent with the experimental data available for myoglobin. The validity of the Debye formula for relaxation time and the effect of β€œdielectric friction” in macromolecular solutions are also discussed.

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