title: The effect of irregularity on the dielectric dispersion characteristics of spherical cellular suspension.
abstract: The dielectric dispersion characteristics of cellular suspensions are fundamentally determined based on the analogy to composite dielectric materials when periodically and discrete arrangement of cells is assumed. However, under native physiological conditions, when flocculation and clamping events usually occur, those assumptions are usually not valid. In the framework of this study, an examination of irregularity effect on the dispersion characteristics of spherical cellular suspensions is presented. Here, the permittivity spectra of the suspensions have been determined by both measurements of living K562 cell suspensions and finite numerical simulations. Based on the measured and simulated spectra, the dispersion characteristics of the suspensions, for several destinies and arrangements of cells, have been quantitatively analyzed using the Havriliak-Negami empirical formula. Generally, a strong correlation between the low dispersion characteristics was observed as the concentration and density of the cells was increased. In addition, all characteristics found to be significantly deviated in comparison to the characteristics of a periodically arrayed suspension. However, when low-dense arrangement was assumed, the correlation found to be much lower when all characteristics found to be less perturbated. Based on a simple model of interacting cells, it is suggested that those deviations are related to intercellular interactions between adjacent cells.
authors: Department of Physical Electronics, Faculty of Engineering, Tel-Aviv University, Israel. amitron@eng.tau.ac.il
authors: Amit
authors: A
authors: Ron
authors: Nick
authors: N
authors: Fishelson
authors: Irena
authors: I
authors: Shur
authors: Nathan
authors: N
authors: Croitoru
authors: Dafna
authors: D
authors: Benayahu
authors: Yosi
authors: Y
authors: Shacham-Diamand
mesh_terms: D002449:Cell Aggregation; D002450:Cell Communication; D048430:Cell Shape; D003198:Computer Simulation; D004553:Electric Conductivity; D006801:Humans; D020014:K562 Cells; D008954:Models, Biological; D012044:Regression Analysis; D013535:Suspensions
chemical_list: D013535:Suspensions