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LOW-FREQUENCY DIELECTRIC PROPERTIES OF BIOLOGICAL TISSUES: A REVIEWWITH SOME NEW INSIGHTS

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  Transactions of the ASAE. 41(1): 173-184. (doi: 10.13031/2013.17142) @1998
Authors:   W. Kuang, S. O. Nelson
Keywords:   Dielectric properties, Electrical properties, Dielectric dispersion, Dielectric relaxation, Biological tissue, Electrode polarization
Low-frequency dielectric properties of biological tissues, characterized by - and -dispersions, are reviewedwith emphasis on physical mechanisms. Ion activities, tissue microstructure and composition are discussed. A newmechanism associated with membrane permeability is included. The counterion layer (electrical double layer)phenomenon is discussed. Electrode polarization, which always causes problems with low-frequency dielectricmeasurements, is also discussed.

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Low-frequency dielectric properties of biological tissues, characterized by - and -dispersions, are reviewed with emphasis on physical mechanisms. Ion activities, tissue microstructure and composition are discussed. A new mechanism associated with membrane permeability is included. The counterion layer (electrical double layer) phenomenon is discussed. Electrode polarization, which always causes problems with low-frequency dielectric measurements, is also discussed.

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