Title :
New quantitative "reading" of dielectric spectra of complex biological systems
Author :
Nigmatullin, R.R. ; Nelson, S.O.
Author_Institution :
Theor. Phys. Dept., Kazan State Univ.
fDate :
12/1/2006 12:00:00 AM
Abstract :
Dielectric spectroscopy data from measurements on four insect species from 200 MHz to 20 GHz over a temperature range from 10 to 70degC are described through reduction of numerous micromotions to a few collective motions, recognition of a low-frequency dispersion through ratio presentation format, application of a self-consistent iteration procedure, a separation procedure for types of collective motions, and application of the eigen-coordinates method for calculation of seven fitting parameters. Use of such fitting parameters to describe the total system relaxation processes quantitatively should enable practical uses of dielectric spectroscopy for measuring desired qualities or characteristics of biological and other complex materials. This general approach based on the reduction procedure and the use of different formats, including the original fitting procedure, allows more precise determination of the corresponding fitting function and description of dielectric spectra of complex systems. The application of this general methodology can be considered as the basic goal and motivation for this paper
Keywords :
biological techniques; eigenvalues and eigenfunctions; large-scale systems; spectroscopy; zoology; 10 to 70 degC; 200 MHz to 20 GHz; collective motion; complex biological system; dielectric spectra; dielectric spectroscopy; eigen-coordinates method; fitting parameter; insect species; low-frequency dispersion recognition; micromotion; self-consistent iteration; system relaxation process; Biological systems; Biomedical measurements; Dielectric measurements; Electrochemical impedance spectroscopy; Electromagnetic fields; Fitting; Insects; Permittivity measurement; Radio frequency; Temperature distribution;
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
DOI :
10.1109/TDEI.2006.258204