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Simplified estimation of membrane potentials induced by high-frequency electric signals Cover

Simplified estimation of membrane potentials induced by high-frequency electric signals

Journal of Electrical Bioimpedance
Volume 5 (2014): Issue 1 (January 2014)
By: Mehrdad Saviz and  Reza Faraji-Dana  
Open Access
|Dec 2014

Figures & Tables

Fig.1

Models for field distribution with and without membranes: (a) The case where the electric field is perpendicular to the membrane; (b) The case where the electric field is parallel to the membrane.
Models for field distribution with and without membranes: (a) The case where the electric field is perpendicular to the membrane; (b) The case where the electric field is parallel to the membrane.

Fig.2

The electrical properties of the aqueous phase: solid line: real permittivity, dash-dotted line: effective conductivity.
The electrical properties of the aqueous phase: solid line: real permittivity, dash-dotted line: effective conductivity.

Fig.3

Log plot for the difference of the admittance ratio M from unity, which shows that approximately from f=100 MHz onwards, the presence of membrane becomes insignificant in the overall admittance.
Log plot for the difference of the admittance ratio M from unity, which shows that approximately from f=100 MHz onwards, the presence of membrane becomes insignificant in the overall admittance.

Fig.4

Membrane amplification factor G. The first drop occurs when displacement currents become dominant. The second drop occurs due to water relaxation around 20 GHz.
Membrane amplification factor G. The first drop occurs when displacement currents become dominant. The second drop occurs due to water relaxation around 20 GHz.

Fig.5

Potential distribution with the presence of membranes, and normal electric field in the membrane (along the dashed curve in the cell membrane); solid line: results of removing membranes in the numerical model and retrieval of membrane fields using (Eq.6), Markers: exact numerical computation of membrane fields, for (a) 1MHz, (b) 1GHz, (c) 500 GHz.
Potential distribution with the presence of membranes, and normal electric field in the membrane (along the dashed curve in the cell membrane); solid line: results of removing membranes in the numerical model and retrieval of membrane fields using (Eq.6), Markers: exact numerical computation of membrane fields, for (a) 1MHz, (b) 1GHz, (c) 500 GHz.
DOI: https://doi.org/10.5617/jeb.738 | Journal eISSN: 1891-5469
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Language: English
Page range: 9 - 13
Submitted on: Jul 3, 2013
Published on: Dec 31, 2014
Published by: University of Oslo
In partnership with: Paradigm Publishing Services
Publication frequency: 1 issue per year
Keywords:
Cytoplasm Membranes,
Numerical Modeling,
Trans-membrane Potential,
High Frequencies
Related subjects:
Engineering,
Bioengineering and biomedical engineering,
Biomedical electronics,
Life sciences,
Biophysics,
Medicine,
Biomedical engineering,
Physics,
Spectroscopy and metrology

© 2014 Mehrdad Saviz, Reza Faraji-Dana, published by University of Oslo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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