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Dielectric Relaxation in Biological SystemsPhysical Principles, Methods, and Applications$
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Valerica Raicu and Yuri Feldman

Print publication date: 2015

Print ISBN-13: 9780199686513

Published to Oxford Scholarship Online: August 2015

DOI: 10.1093/acprof:oso/9780199686513.001.0001

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Radiofrequency Dielectric Properties of Cell Suspensions

Radiofrequency Dielectric Properties of Cell Suspensions

Chapter:
(p.340) 3.6 Radiofrequency Dielectric Properties of Cell Suspensions
Source:
Dielectric Relaxation in Biological Systems
Author(s):

Koji Asami

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780199686513.003.0013

Radiofrequency dielectric properties of cell suspensions provide rich information on the structural and electrical properties of cells. Cell suspensions show α-and β-dispersions, which usually appear below and above 10 kHz, respectively. For the β-dispersion, the theoretical models of cells presented in Chapter 1.2 are overviewed, in order to illustrate their relevance and appropriateness to various types of cells. Next, the chapter considers problems in estimating the electrical parameters of the cell components including the plasma membrane and the cytoplasm from the β-dispersion. At the end this chapter discusses the membrane properties and conditions (i.e., surface charges, membrane folding, membrane disruption, and mobile charges in the membrane) that provide possible polarization mechanisms responsible for the α-dispersion.

Keywords:   biological cells, interfacial polarization, cell models, plasma membrane, cytoplasm, membrane capacitance, β-dispersion

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