Dielectric and electrical properties of hydrated bovine serum albumin
- 1 January 1980
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
- Vol. 76, 426-434
- https://doi.org/10.1039/f19807600426
Abstract
Steady state conductivity and dielectric measurements over the range 2 × 10–5 to 105 Hz are reported for compressed samples of bovine serum albumin as a function of hydration. Two dielectric dispersions were observed, with the higher frequency dispersion having a relaxation time given by τ=ε0εr/σ, where σ is the steady state conductivity and εr is the relative permittivity measured at 105 Hz. A model is proposed which directly relates the d.c. and dielectric properties in terms of the activated hopping of a fixed number of charge carriers over potential energy barriers within the bulk of the samples.Keywords
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