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 ...

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 ...

The description of transport phenomena in biological membranes is still unclear from the viewpoint of physical chemistry. Transport phenomena in ion exchange membranes can be controlled by several factors such as ionic concentration within the membrane, fixed charge concentration, solution composition, ionic fluxes, and water content. The ionic transport as well as distinctive selectivity is pr...

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 realistic model of a fixed-charge membrane was constructed to elucidate the principles involved in the Teorell-Meyer-Sievers theory. Polyelectrolyte solutions (polystyrene sulfonic acid or gelatin) were used in a multicompartment cell to serve as the "membrane." The ionic concentration and potential differences between the compartments served as a finite increment approximation to a continuou...

Abstract This article explores a gradual shift towards metrical and linguistic imprecision in the four major commentaries on Old Norse Eddic poems produced from 1930s to today. trend both affects reflects state of scholarship at large. Many scholars today do not avail themselves criteria dating textual restitution but approach these issues either with agnosticism or by presenting vague argument...

In this paper we present the theory of Timed Modal Specii-cations (TMS) together with its implementation, the tool Epsilon. TMS and Epsilon are timed extensions of respectively Modal Speciications 7, 9] and the Tav system 6, 4]. Also, the theory of TMS is an extension of real{timed process calculi with the speciic aim of allowing loose or partial speciications. This allows us to deene a notion ...

Transcranial magnetic stimulation (TMS) is an effective method used to diagnose and treat many neurological disorders. Although repetitive TMS (rTMS) has been used to treat a variety of serious pathological conditions including stroke, depression, Parkinson's disease, epilepsy, pain, and migraines, the pathophysiological mechanisms underlying the effects of long-term TMS remain unclear. In the ...