Conducting Solids: In the Search for Multivalent Cation Transport

AbstractIonically conducting materials containing PEO were prepared from telechelic di(methyl-diethoxy-silane) PEO, synthesized by the hydrosilylation of telechelic diallyl-PEO with methyldiethoxysilane. The network is obtained by the usual sol-gel chemistry. Then, it is filled with LiClO4 by diffusion of the salt and further drying. A comparison is made with the same kind of materials crosslinked using urethane chemistry. Diffusion studies show that the diffusion coefficient of solvent is similar for both types of materials, whilst the ionic conductivity is higher for the networks crosslinked with siloxane bonds. An experiment of diffusion of LiClO4 without solvent showed that this salt has a diffusion coefficient of the order of 2.10-8 cm2.sec-1 at 34°C. The conductivity calculated from this determination is compatible with the mechanism of lithium cation transport by the diffusion of salt molecules. Elasticity modulus measurements show that the salt aggregates are essentially located within the crosslinks at low concentration, but also in the PEO chains for salt concentrations higher than 1 mol/l.

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Cation transport and specificity of ionomycin. Comparison with ionophore A23187 in rat liver mitochondria.

Journal of Biological Chemistry ◽

10.1016/s0021-9258(19)85799-x ◽

1980 ◽

Vol 255 (7) ◽

pp. 2735-2739

Author(s):

R.F. Kauffman ◽

R.W. Taylor ◽

D.R. Pfeiffer

Keyword(s):

Rat Liver ◽

Cation Transport ◽

Liver Mitochondria ◽

Rat Liver Mitochondria ◽

Ionophore A23187

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Polarization Effects in Water-Mediated Selective Cation Transport across a Narrow Transmembrane Channel

Journal of Chemical Theory and Computation ◽

10.1021/acs.jctc.0c00968 ◽

2021 ◽

Vol 17 (3) ◽

pp. 1726-1741

Author(s):

Van Ngo ◽

Hui Li ◽

Alexander D. MacKerell ◽

Toby W. Allen ◽

Benoît Roux ◽

...

Keyword(s):

Cation Transport ◽

Polarization Effects ◽

Transmembrane Channel

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Functional Impairment of Renal Organic Cation Transport in Experimental Diabetes

Pharmacology & Toxicology ◽

10.1034/j.1600-0773.2002.900402.x ◽

2002 ◽

Vol 90 (4) ◽

pp. 181-186 ◽

Cited By ~ 22

Author(s):

Brett Grover ◽

Christopher Auberger ◽

Rangaprasad Sarangarajan ◽

William Cacini

Keyword(s):

Functional Impairment ◽

Organic Cation ◽

Experimental Diabetes ◽

Cation Transport ◽

Organic Cation Transport

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Kinetics of bumetanide-sensitive Na+-K+ co-transport in erythrocytes of essential hypertensive patients

Clinical Science ◽

10.1042/cs0690607 ◽

1985 ◽

Vol 69 (5) ◽

pp. 607-611 ◽

Cited By ~ 6

Author(s):

Pietro Delva ◽

Mario De Gasperi ◽

Maurizio Degan ◽

Grazia Covi ◽

Alessandro Lechi

Keyword(s):

Kinetic Parameters ◽

Transport System ◽

Clinical Data ◽

Laboratory Data ◽

Cation Transport ◽

Hypertensive Patients ◽

Apparent Affinity ◽

Normotensive Subjects ◽

Kinetics Of

1. Outward bumetanide-sensitive Na+-K+ co-transport was studied in the erythrocytes of 51 subjects, 24 normotensive subjects and 27 hypertensive patients, matched for sex and age. 2. Three kinetic parameters of this cation transport system were considered: velocity of efflux at saturating internal sodium (Nai) concentrations (Vmax.), apparent affinity for sodium (K50%) and index of co-operativity among Nai sites (Hill's n). 3. We correlated these values with clinical and laboratory data determined routinely in hypertension. 4. There were no significant differences between normotensive and hypertensive subjects for the values considered and we did not find any significant correlations between co-transport and clinical data.

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