Energy absorption of human red blood cells and conductivity of the cytoplasm influenced by temperature.

Autor: Sudsiri CJ; Department of Industrial Management, Faculty of Sciences and Industrial Technology, Prince of Songkla University - Suratthani, Thailand. Electronic address: chadapust.s@psu.ac.th., Ritchie RJ; Biotechnology of Electromechanics Research Unit, Faculty of Technology and Environment, Prince of Songkla University -, Phuket, Thailand. Electronic address: raymond.r@phuket.psu.ac.th.
Jazyk: angličtina
Zdroj: Biophysical chemistry [Biophys Chem] 2021 Jun; Vol. 273, pp. 106578. Date of Electronic Publication: 2021 Mar 23.
DOI: 10.1016/j.bpc.2021.106578
Abstrakt: The energy absorbed into tissues is known as the specific energy absorption (SAR) which is dependent on conductivity of the tissue. We calculated cytoplasmic conductivity of human red blood cell (HRBC) using the intracellular ionic concentrations and the Debye-Hückel-Onsager relation. The overall concentration is determined by cell volume and cell water content. The calculated HRBC conductivity at 25 o C was σ c , 25  = 0.5566 ± 0.0146 S m -1 , ±SE). It is exponentially related to temperature: Q 10  ≈ 1.866. At 37 o C, the calculated SAR value is 1.6 W kg -1 using a linear temperature compensation of conductivity. However, if using a biologically realistic non-linear temperature compensated conductivity, the SAR is ≈ 2.62 ± 0.05 W kg -1 . The relationship between SAR and temperature increase is not straightforward. Since there is a wide variance in cellular ionic and water perfusion rates more tissue-specific SAR limits which consider temperature-related factors would be valuable.
(Copyright © 2021. Published by Elsevier B.V.)
Databáze: MEDLINE
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