Nonequilibrium thermodynamic studies of electrokinetic effects across an artificial lipid-coated membrane

Rizvi, S. A.; Zaidi, S.

doi:10.1016/0021-9797(84)90325-4

Cited by 11 publications

(10 citation statements)

References 10 publications

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“…Electrokinetic effects, i. e. the hydraulic permeability, electroosmosis, the streaming potential, current and resistance of the permeant between the electrodes were measured in the usual way [1,2]. All necessary precautions were taken and possible sources of error avoided [7].…”

Section: Methodsmentioning

confidence: 99%

“…(a) Purification of Chemicals: é Phospholipids (Bovine Brain Koch Ltd., England) acetone, methanol and Chloroform (A. R., B. D. H.) were purified in the same way described earlier [1,2]. The pure lipids were stored in a vacuum desiccator in order to prevent decomposition.…”

Section: Methodsmentioning

confidence: 99%

“…In previous studies, single lipid membranes, supported by pyrex sintered G 4 glass discs, have been considered and electrokinetic effects of water, acetone and their mixtures of various compositions have been measured [1][2][3], Water and acetone are present in most bookes of animals and the plasma membrane, surrounding a biological cell contains a mixture of lipids, proteins, enzymes etc. In order to have some basic information of the transfer of liquids across cellular membranes, artificial membranes, having two lipids together, were prepared.…”

Section: Introductionmentioning

confidence: 99%

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Studies on Electrokinetic Effects Across Supported Mixed Lipid Membranes

Rizvi¹,

Zaidi²

1987

Journal of Non-Equilibrium Thermodynamics

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We considered artificial mixed lipid membranes, supported by a pyrex sintered G 4 glass disc and measured the hydraulic permeability, electroosmosis, the streaming potential and current of acetone in this system. The phenomenological coefficients have been calculated by applying the formalism of non-equilibrium thermodynamics. The cross coefficients L 12 and L 2i were found nearly equal showing the validity of the Onsager reciprocal relation for the system studied. The thermodynamic fluxes and forces were found to be linearly related. The maximum of the electrokinetic energy conversion of electroosmosis and of the streaming potential has been calculated.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Studies on Electrokinetic Effects Across Supported Mixed Lipid Membranes

Rizvi¹,

Zaidi²

1987

Journal of Non-Equilibrium Thermodynamics

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“…The hydraulic permeability, electroosmosis, streaming potential and current were measured in an electroosmotic cell by the same method which already has been described in [9,10]. All necessary precautions were taken and sources of error avoided, [11].…”

Section: (B) Membrane Preparation and Measurement Of Electrokinetic Ementioning

confidence: 99%

“…Lipid membranes of cephalin and phosphatidyl inositol were prepared in the same way described earlier [9,10]. The hydraulic permeability, electroosmosis, streaming potential and current were measured in an electroosmotic cell by the same method which already has been described in [9,10].…”

Section: (B) Membrane Preparation and Measurement Of Electrokinetic Ementioning

confidence: 99%

Electrokinetic Effects off Aqueous Acetone Transmitting Supported Lipid Membranes

Rizvi¹,

Zaidi²

1984

Journal of Non-Equilibrium Thermodynamics

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Electrokinetic phenomena like hydraulic permeability, electroosmosis, streaming potential and current of water -acetone mixtures of different compositions, through cephalin and phosphatidyl inositol membranes, supported by a pyrex sintered G 4 glass disc, have been studied. The results obtained have been analysed with the help of non-equilibrium thermodynamics. Onsager's reciprocal relation has found to be valid and the efficiency of the electrokinetic energy conversion for electroosmosis and the streaming potential has been calculated. The concentration dependence of the phenomenological coefficients L l± and L 12 has also been taken into account.

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Transport studies with model membrane

Siddiqi¹,

Alvi²

1989

J Polym Sci B Polym Phys

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The most recent theory for salt concentration dependence of biionic potential, developed by Ikeda and his colleagues on the basis of thermodynamics of irreversible processes, has been compared with that of Nozaki et al. to get a relationship for the calculation of theoretical values of biionic potential. The latter are in good agreement with the experimental data gathered for the parchment‐supported manganese ferricyanide membrane in contact with various alkali chloride solutions. The conclusion of selectivity sequence of group Ia cations, reached on the basis of measurements of biionic potentials, is consistent not only with the findings of thermodynamic effective fixed charge density, evaluated by utilizing membrane potential equations provided by nonequilibrium thermodynamics, but also with the data on activation parameters calculated by making use of the theory of absolute reaction rates. The values of impedance Z, membrane resistance Rm, and membrane capacitance Cm have also been evaluated on the basis of a simple equivalent circuit model. Impedance values follow the theoretical predictions at high frequencies, but at lower frequencies there is a marked deviation from the ideal behavior probably due to roughness and nonhomogeneity of the membrane used in this investigation.

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Nonequilibrium thermodynamic studies of electrokinetic effects across an artificial lipid-coated membrane

Cited by 11 publications

References 10 publications

Studies on Electrokinetic Effects Across Supported Mixed Lipid Membranes

Studies on Electrokinetic Effects Across Supported Mixed Lipid Membranes

Electrokinetic Effects off Aqueous Acetone Transmitting Supported Lipid Membranes

Transport studies with model membrane

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