Electrical properties of phospholipid vesicles.

doi:10.1016/S0006-3495(70)86356-1

Journal Article•DOI•

Electrical properties of phospholipid vesicles.

H.P. Schwan, S. Takashima, V.K. Miyamoto, W. Stoeckenius

01 Nov 1970-Biophysical Journal (The Biophysical Society)-Vol. 10, Iss: 11, pp 1102-1119

TL;DR: The capacitance of the membrane of phospholipid vesicles and the electrical properties of the vesicle interior have been determined and the relaxational behavior at low frequencies and high frequencies is of the Maxwell-Wagner type.

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About: This article is published in Biophysical Journal.The article was published on 1970-11-01 and is currently open access. It has received 78 citations till now. The article focuses on the topics: Vesicle & Lipid bilayer.

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Journal Article•DOI•

Characterization of heterogeneous systems by dielectric spectroscopy

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Koji Asami¹•Institutions (1)

Kyoto University¹

01 Oct 2002-Progress in Polymer Science

TL;DR: In this paper, applications of dielectric spectroscopy to heterogeneous systems, such as particle suspensions, membranes in liquids and composite materials, are described, and practical applications to artificial and biological membrane systems and colloidal suspensions including biological cells are presented.

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506 citations

Journal Article•DOI•

RF-field interactions with biological systems: Electrical properties and biophysical mechanisms

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H P Schwan¹, Kenneth R. Foster•Institutions (1)

University of Pennsylvania¹

01 Jan 1980

TL;DR: In this article, the physical mechanisms for the observed temperature coefficients of the dielectric properties were discussed in terms of the interaction mechanisms which give rise to observed relaxational effects, and possible mechanisms for nonthermal weak interactions between radiofrequency energy and tissues were discussed and evaluated.

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Abstract: Electrical properties of tissues, macromolecular solutions, and cell membranes are summarized at frequencies from the extra low frequency (ELF) to microwave range. Previously presented dielectric data are supplemented by new results and a more detailed discussion of the physical mechanisms for the observed temperature coefficients of the dielectric properties. The dielectric data are discussed in terms of the interaction mechanisms which give rise to observed relaxational effects. Possible mechanisms for nonthermal weak interactions between radio-frequency (RF) energy and tissues are discussed and evaluated.

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410 citations

Journal Article•DOI•

Single cell dielectric spectroscopy

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Hywel Morgan¹, Tao Sun, David Holmes, Shady Gawad², Nicolas G. Green - Show less +1 more•Institutions (2)

University of Southampton¹, École Polytechnique Fédérale de Lausanne²

07 Jan 2007-Journal of Physics D

TL;DR: In this article, a review of single cell dielectric spectroscopy methods is presented, including ac electrokinetic methods of dielectrophoresis and electrorotation.

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Abstract: Over the last century a number of techniques have been developed which allow the measurement of the dielectric properties of biological particles in fluid suspension. The majority of these techniques are limited by the fact that they only provide an average value for the dielectric properties of a collection of particles. More recently, with the advent of microfabrication techniques and the Lab-on-a-chip, it has been possible to perform dielectric spectroscopic experiments on single biological particles suspended in physiological media. In this paper we review current methods for single cell dielectric spectroscopy. We also discuss alternative single cell dielectric measurement techniques, specifically the ac electrokinetic methods of dielectrophoresis and electrorotation. Single cell electrical impedance spectroscopy is also discussed with relevance to a microfabricated flow cytometer. We compare impedance spectroscopy data obtained from measurements made using a microfabricated flow cytometer with simulation data obtained using an equivalent circuit model for the device.

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408 citations

Cites background or methods from "Electrical properties of phospholip..."

...(28) Equations (22)–(27) are versions of the MMT for a single shell cell model....
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...15 287-295 [85] Schwan H P, Takashima S, Miyamoto V K and Stoeckenius W 1970 Electrical properties of phospholipid vesicles Biophys....
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...In this work we used the MMT and ECM to simulate the impedance spectrum and electrical response of the particle in suspension....
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...In dielectric spectroscopy of cells, MMT (equation (17)) is generally used to obtain the dielectric properties of the individual components using the shell model to represent the particle....
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...Several approaches have been used to model the dielectric properties of single particles in suspension, including the finite element method [80], Maxwell’s mixture theory (MMT) [33, 80, 85], equivalent circuit model (ECM) [27, 86], the boundary element method [87], the transport lattice method [88,89] and the finite difference method [90]....
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Journal Article•DOI•

Ionization of phospholipids and phospholipid-supported interfacial lateral diffusion of protons in membrane model systems

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Jean-François Tocanne, Justin Teissié

28 Feb 1990-Biochimica et Biophysica Acta

322 citations

Journal Article•DOI•

Van der Waals interactions between surfaces of biological interest

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Shlomo Nir¹•Institutions (1)

Roswell Park Cancer Institute¹

01 Jan 1977-Progress in Surface Science

TL;DR: In this article, both microscopic and macroscopic approaches to calculations of long-range Van der Waals interactions between bodies are reviewed, for various geometries, including planar-layered structures, sheathed spheres and rods.

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194 citations

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Electrical properties of phospholipid vesicles.

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