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Titolo: A comprehensive approach to electroorientation, electrodeformation, dielectrophoresis, and electrorotation of ellipsoidal particles and biological cells
Autore: Gimsa, J;
 Indirizzi:
 Univ Rostock, Fachbereich Biol, D18051 Rostock, Germany Univ Rostock Rostock Germany D18051 eich Biol, D18051 Rostock, Germany
 Titolo Testata:
 BIOELECTROCHEMISTRY
fascicolo: 1,
volume: 54,
anno: 2001,
pagine: 23  31
 SICI:
 03024598(200108)54:1<23:ACATEE>2.0.ZU;2M
 Fonte:
 ISI
 Lingua:
 ENG
 Soggetto:
 DIELECTRICSPECTROSCOPY; ERYTHROCYTEMEMBRANES; FIELD; MODEL; POLARIZATION; SUSPENSIONS; DEFORMATION; ROTATION; FORCES; BLOOD;
 Keywords:
 dielectric cell properties; ACelectrokinetics; impedance; singleshell model; Laplace equation;
 Tipo documento:
 Article
 Natura:
 Periodico
 Settore Disciplinare:
 Life Sciences
 Citazioni:
 46
 Recensione:
 Indirizzi per estratti:
 Indirizzo: Gimsa, J Univ Rostock, Fachbereich Biol, Wismarsche Str 8, D18051 Rostock, Germany Univ Rostock Wismarsche Str 8 Rostock Germany D18051 k, Germany



 Citazione:
 J. Gimsa, "A comprehensive approach to electroorientation, electrodeformation, dielectrophoresis, and electrorotation of ellipsoidal particles and biological cells", BIOELECTRO, 54(1), 2001, pp. 2331
Abstract
Suspended cells may respond to AC polarization by orienting, deforming, moving or rotating. For modeling of ellipsoidal cells, a new dipole approach is proposed. Along each of the principal axis of the model, three finite elements of arbitrary but equal crosssectional area for the interior, low conductive membrane shell and exterior are assumed. The length of the external medium elements is defined by influential radii which are related to the depolarizing factors. The model predicts the potential at the ellipsoid's surface leading to the induced dipole moment. The moment obtained is identical to the Laplace approach for homogeneous ellipsoids; in the singleshell case, it is slightly different. The reason is the constant shell thickness which overcomes the confocal thickness necessary for the Laplace solution. Expressions for electroorientation, deformation, dielectrophoresis, and electrorotation are derived. In linearly and circularly polarized fields, different orientation spectra are predicted to occur. While in linearly polarized AC fields, particles are oriented along their axis of highest polarizability, in circularly polarized fields, the axis of lowest polarizability isoriented perpendicular to the plane of field rotation. Based on this finding, a new electroorientation method is proposed. In dielectrophoresis and electrorotation, reorientations are predicted which lead to discontinuous spectra. (C) 2001 Elsevier Science B.V. All rights reserved.
ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/03/20 alle ore 08:15:08