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Journals
Journal of Electrical Bioimpedance
Volume 5 (2014): Issue 1 (January 2014)
Open Access
Simplified estimation of membrane potentials induced by high-frequency electric signals
Mehrdad Saviz
Mehrdad Saviz
and
Reza Faraji-Dana
Reza Faraji-Dana
| Dec 31, 2014
Journal of Electrical Bioimpedance
Volume 5 (2014): Issue 1 (January 2014)
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Article Category:
Articles
Published Online:
Dec 31, 2014
Page range:
9 - 13
Received:
Jul 03, 2013
DOI:
https://doi.org/10.5617/jeb.738
Keywords
Cytoplasm Membranes
,
Numerical Modeling
,
Trans-membrane Potential
,
High Frequencies
© 2014 Mehrdad Saviz and Reza Faraji-Dana, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
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.
Fig.2
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.
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.
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.