Journal of Stress Physiology & Biochemistry, Vol. 15 No. 1 2019, pp. 41-45 ISSN 1997-0838
Original Text Copyright (cc) 2019 by  Martusevich, Petrov, Galka and Golygina

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The Study of Dielectric Properties of Biological Tissue under Thermal Modification in vitro

Andrew K. Martusevich 1, Sergey V. Petrov 2, Alexander G. Galka 1,3, Elena S. Golygina 1

1 Laboratory of medical biophysics, Privolzhsky Research Medical University; 603155, Russia, Nizhny Novgorod, Minin sq., 10/1
2 Department of hand microsurgery, Privolzhsky Research Medical University; 603155, Russia, Nizhny Novgorod, Minin sq., 10/1
Laboratory of space plasma modeling, Institute of Applied Physics; 610027, Russia, 603950, Nizhny Novgorod, Ulyanov st., 46


Received February 27, 2019

The aim of this paper is to study the dynamics of the dielectric properties of the tissue in the experimental controlled thermal modification.
Material and methods: the experiment was performed on equal in volume and mass samples of intraoperatively removed tissue of Palmar aponeurosis (n=8). The thermal effect was simulated by placing tissue fragments in a thermostat (processing time – 5 min., temperature – 60 C). Duration of exposure after thermal modification was 5 min. Dielectric properties of tissues was determined using an original hardware-software complex for near-field resonant microwave sensing.
Results: the study made it possible to verify the shifts in dielectric properties of the tissue that occur under short-term exposure to high temperature in vitro. It is shown that the dielectric permeability and conductivity of the biological object are significantly reduced under the influence of this factor, which is primarily due to a decrease of its hydration degree.

Key words:    Palmar aponeurosis, thermal modification, near-field resonance microwave sensing, dielectric permittivity, thermal stress

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