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Hayashi K, Sugimura H, Kamei T, Shimanouchi T, Nakamura H, Umakoshi H. Quantitative Determination of Relative Permittivity Based on the Fluorescence Property of Pyrene Derivatives: An Interpretation of Hydrophobicity in Self-Assembled Aggregates of Nonionic Amphiphiles. J Phys Chem B 2021; 125:6192-6200. [PMID: 34077661 DOI: 10.1021/acs.jpcb.1c00170] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Aggregates in aqueous solutions can embed hydrophobic molecules, and their interactions depend on the properties of the aggregates. The electric surface potential, molecular mobility, and gradual hydrophobicity are the properties that regulate the interactions, and it is essential to understand these to quantify the properties. Electric surface potential and molecular mobility are quantified using the zeta potential and NMR measurements. In this study, the quantification of gradual hydrophobicity within the aggregate based on the relative permittivity, also called the dielectric constant, has been estimated from fluorescence spectra of pyrene-dicarboxylic acid conjugates. The localization of the pyrene moiety was modified by conjugation with succinic acid, suberic acid, or dodecanedioic acid, and the conjugates were evaluated in the shallow, middle, and deep regions of the aggregates. Span and Tween surfactants have been employed to prepare these aggregates, because they form various kinds of aggregates such as micelles and vesicles. It was realized that the hydrophobicity gradually increased from the interface to the hydrophobic core. Alternatively, a comparison of hydrophobicity within the aggregates showed no remarkable difference. Moreover, the analyses suggested that there are a few water molecules in the deep region. These results support the idea of the localization of embedded molecules in aggregates.
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Affiliation(s)
- Keita Hayashi
- Department of Chemical Engineering, National Institute of Technology, Nara College, 22 Yata-cho, Yamatokoriyama, Nara 639-1080, Japan
| | - Haruna Sugimura
- Department of Chemical Engineering, National Institute of Technology, Nara College, 22 Yata-cho, Yamatokoriyama, Nara 639-1080, Japan
| | - Toshiyuki Kamei
- Department of Chemical Engineering, National Institute of Technology, Nara College, 22 Yata-cho, Yamatokoriyama, Nara 639-1080, Japan
| | - Toshinori Shimanouchi
- Graduate School of Environmental and Life Science, Okayama University, 3-1-1 Tsushima-Naka, Kita-ku, Okayama 700-8530, Japan
| | - Hidemi Nakamura
- Department of Chemical Engineering, National Institute of Technology, Nara College, 22 Yata-cho, Yamatokoriyama, Nara 639-1080, Japan
| | - Hiroshi Umakoshi
- Division of Chemical Engineering, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama-cho, Toyonaka, Osaka 560-8531, Japan
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Blackwell R, Hemmerle A, Baer A, Späth M, Peukert W, Parsons D, Sengupta K, Smith AS. On the control of dispersion interactions between biological membranes and protein coated biointerfaces. J Colloid Interface Sci 2021; 598:464-473. [PMID: 33951546 DOI: 10.1016/j.jcis.2021.02.078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 02/03/2021] [Accepted: 02/17/2021] [Indexed: 11/28/2022]
Abstract
HYPOTHESIS Interaction of cellular membranes with biointerfaces is of vital importance for a number of medical devices and implants. Adhesiveness of these surfaces and cells is often regulated by depositing a layer of bovine serum albumin (BSA) or other protein coatings. However, anomalously large separations between phospholipid membranes and the biointerfaces in various conditions and buffers have been observed, which could not be understood using available theoretical arguments. METHODS Using the Lifshitz theory, we here evaluate the distance-dependent Hamaker coefficient describing the dispersion interaction between a biointerface and a membrane to understand the relative positioning of two surfaces. Our theoretical modeling is supported by experiments where the biointerface is represented by a glass substrate with deposited BSA and protein layers. These biointerfaces are allowed to interact with giant unilamellar vesicles decorated with polyethylene glycol (PEG) using PEG lipids to mimic cellular membranes and their pericellular coat. RESULTS We demonstrate that careful treatment of the van der Waals interactions is critical for explaining the lack of adhesiveness of the membranes with protein-decorated biointerfaces. We show that BSA alone indeed passivates the glass, but depositing an additional protein layer on the surface BSA, or producing multiple layers of proteins and BSA results in repulsive dispersion forces responsible for 100 nm large equilibrium separations between the two surfaces.
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Affiliation(s)
- Robert Blackwell
- PULS Group, Department of Physics and Interdisciplinary Center for Nanostructured Films, Friedrich-Alexander-Universität Erlangen-Nürnberg, IZNF, Cauerstrasse 3, 91058 Erlangen, Germany.
| | - Arnaud Hemmerle
- Aix-Marseille Université, Centre Interdisciplinaire de Nanosciences de Marseille, CNRS, UMR 7325, Campus de Luminy, 13288 Marseille cedex 9, France.
| | - Andreas Baer
- PULS Group, Department of Physics and Interdisciplinary Center for Nanostructured Films, Friedrich-Alexander-Universität Erlangen-Nürnberg, IZNF, Cauerstrasse 3, 91058 Erlangen, Germany.
| | - Matthias Späth
- PULS Group, Department of Physics and Interdisciplinary Center for Nanostructured Films, Friedrich-Alexander-Universität Erlangen-Nürnberg, IZNF, Cauerstrasse 3, 91058 Erlangen, Germany
| | - Wolfgang Peukert
- Institute of Particle Technology, Interdisciplinary Center for Functional Particle Systems, Friedrich-Alexander-Universität Erlangen-Nürnberg, Haberstrasse 9a, 91058 Erlangen, Germany.
| | - Drew Parsons
- Department of Chemical and Geological Sciences, University of Cagliari, Cittadella Universitaria, 09042 Monserrato, CA, Italy; Discipline of Physics, Chemistry and Mathematics, College of Science Health Engineering and Education, Murdoch University, Murdoch, 6150 WA, Australia.
| | - Kheya Sengupta
- Aix-Marseille Université, Centre Interdisciplinaire de Nanosciences de Marseille, CNRS, UMR 7325, Campus de Luminy, 13288 Marseille cedex 9, France.
| | - Ana-Sunčana Smith
- PULS Group, Department of Physics and Interdisciplinary Center for Nanostructured Films, Friedrich-Alexander-Universität Erlangen-Nürnberg, IZNF, Cauerstrasse 3, 91058 Erlangen, Germany; Division of Physical Chemistry, Ruđer Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia.
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Alobeedallah H, Cornell B, Coster H. The Effect of Benzyl Alcohol on the Dielectric Structure of Lipid Bilayers. J Membr Biol 2016; 249:833-844. [PMID: 27803961 DOI: 10.1007/s00232-016-9934-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Accepted: 10/22/2016] [Indexed: 11/25/2022]
Abstract
Molecularly tethered lipid bilayer membranes were constructed on a commercially available chemically modified gold substrate. This is a new and promising product that has allowed the construction of very robust lipid bilayers. Very high resolution electrical impedance spectroscopy (EIS) was used to determine the dielectric structure of the lipid bilayers and associated interfaces. The EIS data were modelled in terms of the dielectric substructure using purpose developed software. The hydrophobic region, where the lipid tails are located, was revealed by the EIS in the frequency range of (1-100) Hz and its thickness was calculated from the capacitance of this region and found to be approximately 3-4 nm. The hydrophilic region, where the polar heads are located, was revealed at higher frequencies and its thickness was estimated to be approximately 1-2 nm. The effect of the local anaesthetic benzyl alcohol (BZA) on the tethered lipid bilayers was investigated. The effect of BZA on the membrane capacitance and conductance allowed the changes in the thickness of the polar head and hydrophobic tails regions to be determined. It was found that the addition of BZA caused a significant increase in the capacitance (corresponding to a decrease in the thickness) of the hydrophobic region and an increase in the membrane electrical conductance. The EIS allowed a distinction between a hydrophobic region in the centre of the bilayer and an outer hydrophobic region. Benzyl alcohol was found to have the largest effect on the outer, hydrophobic region, although the inner hydrophobic region was also consistently affected.
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Affiliation(s)
- Hadeel Alobeedallah
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, NSW, 2006, Australia.
| | - Bruce Cornell
- SDx Tethered Membranes Pty Ltd., Roseville, Sydney, NSW, 2069, Australia
| | - Hans Coster
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, NSW, 2006, Australia
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4
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Antony A, Chilcott T, Coster H, Leslie G. In situ structural and functional characterization of reverse osmosis membranes using electrical impedance spectroscopy. J Memb Sci 2013. [DOI: 10.1016/j.memsci.2012.09.028] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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5
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Stoneman M, Chaturvedi A, Jansma DB, Kosempa M, Zeng C, Raicu V. Protein influence on the plasma membrane dielectric properties: in vivo study utilizing dielectric spectroscopy and fluorescence microscopy. Bioelectrochemistry 2007; 70:542-50. [PMID: 17350897 DOI: 10.1016/j.bioelechem.2006.12.008] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2006] [Revised: 12/11/2006] [Accepted: 12/28/2006] [Indexed: 10/23/2022]
Abstract
We have investigated the origin of the dielectric response of the plasma membrane of living yeast cells (Saccharomyces cerevisiae) by using radiofrequency dielectric spectroscopy. The cells were genetically engineered to overexpress in the membrane of yeast cells a G protein-coupled receptor--the Sterile2-alpha factor receptor protein (Ste2p)--fused to the green fluorescent protein (GFP). Presence of the Ste2-GFP proteins in the plasma membrane was confirmed by exciting the cells at 476 nm and observing with a confocal microscope the emission characteristic of the GFP from individual cells. The dielectric behavior of cells suspended in KCl solution was analyzed over the frequency range 40 Hz-110 MHz and compared to the behavior of control cells that lacked the ability to express Ste2p. A two-shell electrical cell model was used to fit the data starting from known structural parameters and adjustable electrical phase parameters. The best-fit value for the relative permittivity of the plasma membrane showed no significant difference between cells expressing Ste2p (1.63+/-0.11) and the control cells (1.75+/-0.16). This result confirmed earlier predictions that the dielectric properties of the plasma membrane in the radiofrequency range mostly reflect the properties of the hydrophobic layer of the membrane, which is populated by the hydrocarbon tails of the phospholipids and hydrophobic segments of integral membrane proteins. We discuss ways by which dielectric spectroscopy can be improved to be used for tag-free detection of proteins on the membrane.
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Affiliation(s)
- M Stoneman
- Department of Physics, University of Wisconsin-Milwaukee, PO Box 413, Milwaukee, WI 53201, USA
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7
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Chapter 5 Physicochemical Insights into Equilibria in Bilayer Lipid Membranes. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/s1554-4516(05)03005-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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8
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Electrochemical Methods and Their Application. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/s1554-4516(05)02001-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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9
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Petelska AD, Figaszewski ZA. Acid-base equilibria at interface separating electrolyte solution and lipid bilayer formed from phosphatidylcholine. Biophys Chem 2003; 104:13-9. [PMID: 12834823 DOI: 10.1016/s0301-4622(02)00324-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The dependence of the interfacial tension of a lipid membrane formed from phosphatidylcholine on the pH of the aqueous solution has been studied. The model describing the H(+) and OH(-) ions adsorption in the bilayer lipid surface has been presented in this work. We take suitable equations to describe the dependence of interfacial tension of a lipid bilayer membrane on H(+) and OH(-) ion concentrations. A theoretical equation is derived to describe this dependence in the whole pH range.
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Affiliation(s)
- Aneta D Petelska
- Laboratory of Interfacial Electrochemistry, Faculty of Chemistry, University of Warsaw, Pasteur St. 1, 02-093 Warsaw, Poland
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10
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Petelska AD, Figaszewski ZA. Acid-base equilibria at interface separating electrolyte solution and lipid bilayer formed from phosphatidylserine. Biophys Chem 2003; 104:5-11. [PMID: 12834822 DOI: 10.1016/s0301-4622(02)00323-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The dependence of the interfacial tension of a lipid membrane formed from phosphatidylserine on the pH of the aqueous solution has been studied. The model described the H(+) and OH(-) ions adsorption in the bilayer lipid surface has been presented in this work. We take suitable equations to describe the dependence of interfacial tension of a lipid bilayer membrane on H(+) and OH(-) ion concentrations. A theoretical equation is derived to describe this dependence in the range of pH, i.e. from 2 to 12.
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Affiliation(s)
- Aneta D Petelska
- Laboratory of Interfacial Electrochemistry, Faculty of Chemistry, University of Warsaw, Pasteur St. 1, 02-093 Warsaw, Poland
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11
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Beddow J, Peterson I, Heptinstall J, Walton D. Electrochemical characterisation of the diffusion of a biomolecule through a hydrogel. J Electroanal Chem (Lausanne) 2003. [DOI: 10.1016/s0022-0728(03)00083-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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12
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Karabaliev M, Kochev V. Electrochemical investigations of cholesterol enriched glassy carbon supported thin lipid films. Biophys Chem 2003; 103:157-67. [PMID: 12568938 DOI: 10.1016/s0301-4622(02)00253-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The formation and study of stable cholesterol enriched thin lipid layers onto the surface of glassy carbon electrode is reported in this work. The method of formation relies on additional thinning of wetting films by electrostriction. Electrochemical techniques based on the concepts of impedance and voltammetry are used to explore the films' features. The impedance data reveal a substantial change of relaxation characteristics of the modified films. In this respect, opportunities for the evaluation of the films' stage based on the approximation with 'constant phase angle element' are discussed. The possible final structure of the films, as well as, their relevance for development of sensor elements are briefly viewed.
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Affiliation(s)
- Miroslav Karabaliev
- Department of Physics and Biophysics, Faculty of Medicine, Trakia University, 11 Armeiska, Stara Zagora 6003, Bulgaria.
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13
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Systems Aspects of Supported Membrane Biosensors. ACTA ACUST UNITED AC 2003. [DOI: 10.1016/s0927-5193(03)80051-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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14
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Dielectric and Electrical Properties of Lipid Bilayers in Relation to their Structure. ACTA ACUST UNITED AC 2003. [DOI: 10.1016/s0927-5193(03)80026-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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15
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Yardley JE, Kell DB, Barrett J, Davey CL. On-line, real-time measurements of cellular biomass using dielectric spectroscopy. Biotechnol Genet Eng Rev 2001; 17:3-35. [PMID: 11255671 DOI: 10.1080/02648725.2000.10647986] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- J E Yardley
- Institute of Biological Sciences, University of Wales, Aberystwyth, Ceredigion SY23 3DA, Wales, U.K
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16
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Karolis C, Coster HG, Chilcott TC, Barrow KD. Differential effects of cholesterol and oxidised-cholesterol in egg lecithin bilayers. BIOCHIMICA ET BIOPHYSICA ACTA 1998; 1368:247-55. [PMID: 9459602 DOI: 10.1016/s0005-2736(97)00180-6] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Low frequency impedance measurements of pure egg lecithin (phosphatidylcholine) bilayers have revealed the presence of four layers which can be attributed to the acyl chain, carbonyl, glycerol bridge and phosphatidylcholine regions of the lecithin molecule. Measurements on bilayers formed in the presence of unoxidised-cholesterol revealed that cholesterol molecules were located in the hydrocarbon region of the bilayer with its hydroxyl groups aligned with the carbonyl region of the lecithin molecules. Measurements of oxidised-cholesterol lecithin bilayers revealed that these molecules protruded less into the hydrocarbon region and their polar hydroxyl group aligned with the glycerol bridge region of the lecithin molecule.
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Affiliation(s)
- C Karolis
- UNESCO Centre for Membrane Science and Technology and Department of Biophysics, School of Physics, University of New South Wales, Sydney, Australia
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17
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Coster HG, Chilcott TC, Coster AC. Impedance spectroscopy of interfaces, membranes and ultrastructures. ACTA ACUST UNITED AC 1996. [DOI: 10.1016/0302-4598(96)05064-7] [Citation(s) in RCA: 161] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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18
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Zha F, Coster H, Fane A. A study of stability of supported liquid membranes by impedance spectroscopy. J Memb Sci 1994. [DOI: 10.1016/0376-7388(94)00093-x] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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19
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Coster H, Kim K, Dahlan K, Smith J, Fell C. Characterisation of ultrafiltration membranes by impedance spectroscopy. I. Determination of the separate electrical parameters and porosity of the skin and sublayers. J Memb Sci 1992. [DOI: 10.1016/0376-7388(92)80087-z] [Citation(s) in RCA: 59] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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20
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Tocanne JF, Teissié J. Ionization of phospholipids and phospholipid-supported interfacial lateral diffusion of protons in membrane model systems. BIOCHIMICA ET BIOPHYSICA ACTA 1990; 1031:111-42. [PMID: 2155023 DOI: 10.1016/0304-4157(90)90005-w] [Citation(s) in RCA: 266] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- J F Tocanne
- Centre de Recherche de Biochimie et Génétique Cellulaires du C.N.R.S., Toulouse, France
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21
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Pethig R, Kell DB. The passive electrical properties of biological systems: their significance in physiology, biophysics and biotechnology. Phys Med Biol 1987; 32:933-70. [PMID: 3306721 DOI: 10.1088/0031-9155/32/8/001] [Citation(s) in RCA: 612] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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22
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23
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Smith J, Coster H, Laver D. The dependence of the conductance of phosphatidylcholine bilayers upon the concentration and composition of the external electrolyte. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 1985. [DOI: 10.1016/0005-2736(85)90537-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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