ELECTRICAL IMPEDANCE SPECTRUM TRANSFORMATION OF BIOLOGICAL TISSUES UNDER THE INFLUENCE OF DESTRUCTIVE FACTORS

Abstract

The paper analyzes the electrical impedance spectra of biological tissue samples obtained by preparation of the liver,
heart, lungs, kidney, and brain of a pig. Nyquist diagrams of initial samples and tissues subjected to the destructive effects of
time-temperature, γ-irradiation, exposure to water, chemical destruction in thiourea were constructed. The optimal model
equivalent electrical circuits of the studied systems are obtained and processed, the correspondence of separate elements of
equivalent circuits and their real analogs in the studied biological tissues have been established, and also the parameters of
the circuit components have been calculated. It is shown that the initial stages of thermotemporal transformation of the fabric
structure are reflected in the change of the parameters of the elements of certain schemes, and irreversible destructive effects
are manifested as a change in the structure of the equivalent circuit. The conclusion has been made about the possibility and
application prospects of an electric impedance method as a potential non-destructive express way of biological fabric
destruction condition control.