Electrical Properties Measurement of Rat Blood in 10 kHz-10 MHz

2013 ◽  
Vol 774-776 ◽  
pp. 836-839
Author(s):  
Gun Li
Keyword(s):  
Electromagnetic Fields ◽  
Biological Effects ◽  
Low Frequency ◽  
Electromagnetic Property ◽  
Critical Issue ◽  
Dielectric Dispersion ◽  
Frequency Range ◽  
Electrical Parameters ◽  
Rat Blood ◽  
Lcr Meter

Electromagnetic property of biological tissue is a critical issue for studying the biological effects of electromagnetic fields. In order to investigate the electrical parameters of rat blood and dispersion spectrum within the low-frequency, dielectric and conductivity parameters of rat blood was measured via HP4275A Multi Frequency LCR Meter in low frequency range (10 kHz-10 MHz), dispersive characteristics of blood electrical parameters was defined within the low-frequency. Dielectric properties of the measurement were used to compare with the theory of Cole-Cole fitting, and the fitting result shows that the Cole-Cole theory can well reflect the dielectric dispersion characteristics of rat blood. These results can be used to studying further biological effects of different frequencies electromagnetic fields.

scholarly journals Effective Permittivity of Biological Tissue: Comparison of Theoretical Model and Experiment

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Li Gun ◽  
Du Ning ◽  
Zhang Liang
Keyword(s):  
Electromagnetic Fields ◽  
Biological Tissue ◽  
Volume Fraction ◽  
Biological Effects ◽  
Effective Permittivity ◽  
Theoretical Perspective ◽  
Critical Issue ◽  
Biological Tissues ◽  
Fat Liver ◽  
Lcr Meter

Permittivity of biological tissue is a critical issue for studying the biological effects of electromagnetic fields. Many theories and experiments were performed to measure or explain the permittivity characteristics in biological tissue. In this paper, we investigate the permittivity parameter in biological tissues via theoretical and experimental analysis. Firstly, we analyze the permittivity characteristic in tissue by using theories on composite material. Secondly, typical biological tissues, such as blood, fat, liver, and brain, are measured by HP4275A Multi-Frequency LCR Meter within 10 kHz to 10 MHz. Thirdly, experimental results are compared with the Bottcher-Bordewijk model, the Skipetrov equation, and the Maxwell-Gannett theory. From the theoretical perspective, blood and fat are regarded as the composition of liver and brain because of the high permittivity in blood and the opposite in fat. Volume fraction of blood in liver and brain is analyzed theoretically, and the applicability and the limitation of the models are also discussed. These results benefit further study on local biological effects of electromagnetic fields.

Electromagnetic Property of La0.7Sr0.3MnO3/Ag Composite at High Frequency

2015 ◽  
Vol 655 ◽  
pp. 182-185
Author(s):  
Ke Lan Yan ◽  
Run Hua Fan ◽  
Min Chen ◽  
Kai Sun ◽  
Xu Ai Wang ◽  
...  
Keyword(s):  
High Frequency ◽  
Single Phase ◽  
Low Frequency ◽  
Electromagnetic Property ◽  
High Frequency Range ◽  
Frequency Range ◽  
Free Electron Concentration ◽  
Theoretical Simulation ◽  
Electrical And Magnetic Properties ◽  
Three Phase

The phase structure, and electrical and magnetic properties of La0.7Sr0.3MnO3(LSMO)-xAg (xis the mole ratio,x=0, 0.3, 0.5) composite were investigated. It is found that the sample withx=0 is single phase; the samples withx=0.3 and 0.5 present three phase composite structure of the manganese oxide and Ag. With the increasing of Ag content, the grain size of the samples increases and the grain boundaries transition from fully faceted to partially faceted. The permittivity of spectrum (10 MHz - 1 GHz) and the theoretical simulation reveal that the plasma frequencyfpincrease with Ag content, due to the increasing of free electron concentration, which is further supported by the enhancement of conductivity. While for the permeability (μr'), theμr'decrease with the increasing of Ag content at low frequency range (f< 20 MHz), while at the relative high frequency range (f> 300 MHz), theμr'increased with Ag content. Therefore, the introduction of elemental Ag resulted in a higherμr'at the relative high frequency range.

scholarly journals Modification ofS. cerevisiaeGrowth Dynamics Using Low Frequency Electromagnetic Fields in the 1-2 kHz Range

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Ján Barabáš ◽  
Roman Radil ◽  
Ivona Malíková
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Electromagnetic Fields ◽  
Proliferative Response ◽  
Low Frequency ◽  
Growth Dynamics ◽  
Magnetic Flux Density ◽  
Wild Type ◽  
Frequency Range ◽  
Ambient Conditions ◽  
Resonance Theory

This paper details our further experiments pertaining to the influence of low frequency electromagnetic fields (LF EMF) on the growth dynamics of two wild-typeSaccharomyces cerevisiaestrands. We opted to explore frequencies beyond the usual 50–60 Hz range, motivated by the ion parametric resonance theory and several studies which discovered and recorded endogenous biosignals in variousSaccharomyces cerevisiaestrands in the 0.4–2.0 kHz frequency range, most probably stemming from microtubules. Both yeast strands used in our experiments have been subjected to continuous 66-hour session of LF EMF exposure (frequencies 1.2, 1.4, 1.6, 1.8, and 2.0 kHz; average magnetic flux density 2.43 mT) under identical ambient conditions. Experiment results indicate a frequency-dependent proliferative response of both yeast strands.

Systematic review on the biological effects of electric, magnetic and electromagnetic fields in the intermediate frequency range (300 Hz to 1 MHz)

2019 ◽  
Vol 171 ◽  
pp. 247-259 ◽  
Author(s):  
Lambert Bodewein ◽  
Kristina Schmiedchen ◽  
Dagmar Dechent ◽  
Dominik Stunder ◽  
David Graefrath ◽  
...  
Keyword(s):  
Systematic Review ◽  
Electromagnetic Fields ◽  
Biological Effects ◽  
Intermediate Frequency ◽  
Frequency Range
Sign in / Sign up

Export Citation Format

Share Document