Reverse electrodialysis is a promising membrane technology to generate energy from controlled mixing of water streams different salinities. Electrical potentials on the ion exchange membranes (IEMs) when selective transport cations and anions across driven by concentration difference. The accurate determination developed IEMs critical fairly assess feasibility technology. Nernst–Planck–Poisson ...

The development of models that predict membrane performance has contributed a better understanding of the basic principles and mechanisms of solute rejection and deposition. It also serves as fundamental properties that allow specific characterization determination. This work fabricates hollow fiber membranes using Polyethersulfone (PES). The membranes were fabricated in-house using phase inver...

a difference in salt concentration in two solutions separated by a membrane leads to an electrical potential difference across the membrane, also without applied current. a literature study is presented on proposed theories for the origin of this membrane potential (ϕm). the most well-known theoretical description is teorell-meyer-sievers (tms) theory, which we analyze and extend. experimental ...

Four extracellular glycolipids produced under growth-limiting conditions were isolated from the culture broth of Pseudomonas spec. DSM 2874. After purification by column and thick-layer chromatography they were identified as anionic rhamnolipids. 1H and 13C-NMR studies showed that two of these, beta(beta(2-O-alpha-L-rhamnopyranosyloxy)decanoyl)decanoic acid and beta(beta(2-O-alpha-L-rhamnopyran...

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Recently a new method was introduced to operate an immunological field effect transistor (ImmunoFET). By changing the electrolyte concentration of the sample solution stepwise (the so-called ion-step), a transient diffusion of ions through the membrane-protein layer occurs, resulting in a transient membrane potential, which is measured by the ImmunoFET. It became apparent that the maximum of th...

A "translation" of the phenomenological permeability coefficients into friction and distribution coefficients amenable to physical interpretation is presented. Expressions are obtained for the solute permeability coefficient omega and the reflection coefficient sigma for both non-electrolytic and electrolytic permeants. An analysis of the coefficients is given for loose membranes as well as for...

Suppose one injects a drug into an animal. What is the time course of the drug concentration in the blood and in the various organs of the body? Although preliminary attempts to set up mathematical models of this problem were made by Teorell [1], [2] and models of certain special cases have been considered by von Schrotter [3], Smith and Morales [4], and Morales and Smith [5], [6], it continues...

In preceding papers *-3 it was shown that electrochemical behavior of collodion membranes (at least in solutions of strong, weakly adsorbable electrolytes) is due to the presence of acidic impurities in the collodion. Highly purified preparations exhibit only low electrochemical activity (as measured by concentration potentials, anomalous osmosis, etc.), and in our opinion, even this low activi...