The equilibrium Nernst potential plays a critical role in neural cell dynamics. A common approximation used in studying electrical dynamics of excitable cells is that the ionic concentrations inside and outside the cell membranes act as charge reservoirs and remain effectively constant during excitation events. Research into brain electrical activity suggests that relaxing this assumption may p...

The vortex-Nernst effect is a highly sensitive probe for detecting vortex motion in a type II superconductor [1]. In the past 3 years, we have used it to map out the region in the fieldtemperature (H-T ) plane in which vorticity may be observed [2,3,4,5]. The results provide a fresh perspective on the cuprate phase diagram which we sketch here. When a superconductor (in the vortex-liquid state)...

Two different analyses of impedance data obtained from ultra-pure water allowed to equilibrate with the atmosphere have recently appeared. They both thus show much smaller low-frequency resistances than does ultra-pure water. Different fitting models were used in these analyses and led to appreciably different parameter estimates from their data fits. Their two “pure” water experimental data se...

The use of Sm-doped Ceria electrolytes (SDC) in SOFCs (solid oxide fuel cells) lowers the open circuit voltage (OCV) below the Nernst voltage (Vth) obtained using Yttria-stabilized Zirconia (YSZ) electrolytes. The OCV is classically calculated with Wagner’s equation. However, using the SDC electrolytes requires both qualitative and quantitative experimental verification of leakage currents. Fur...

In the present paper we extend our theory that calculates the fastest reaction step observable in suspensions containing charged microcrystals and heavy metal cations. The calculation requires the solution of the nonlinear Poisson-Boltzmann equation for nonsymmetric electrolytes plus the Nernst-Planck equation for transport of ions in electric fields. We find that the diffusional transport of i...

Equilibrium in the electronic subsystem across the solution-metal interface is considered to connect the standard electrode potential to the statistics of localized electronic states in solution. We argue that a correct derivation of the Nernst equation for the electrode potential requires a careful separation of the relevant time scales. An equation for the standard metal potential is derived ...

In thesis we propose a mathematical model of electrolyte fluid and interface systems. The model is based on a coupling between the Navier-Stokes equations of an incompressible fluid, the Nernst-Plank-Poisson equations of a diffuse, binary electrolyte, and the phase field Allen-Cahn equation. The coupling is derived in the energetic variational framework and guarantees the consistent exchange of...

The concentrations of K, Na, and CI in the cytoplasm and vacuole, the tracer fluxes of these ions into and out of the cenocyte, and the electrical potential difference between bathing solution and vacuole and cytoplasm, have been measured in Hydrodictyon africanum. If the ions were acted on solely by passive electrochemical forces, a net efflux of K and CI and a net influx of Na would be expect...

A KNOWLEDGE OF MOLECULAR BIOLOGY in health and disease has been a goal of the modern-day physician. Until recently , understanding of the electrocardio-gram has been based mostly on the sequence and duration of the myocardial activation process. The introduction of the Lmg-Gerard1 microcapillary electrode has permitted a study of the resting and action potential of an individual cell. Consequen...

Redox systems MenFc/MenFc+ (n=6, 8, 10) consisting of symmetric polymethylferrocene and the corres-pon¬ding polymethylferricinium cation have been studied by cyclic voltammetry in organic solvents - acetonitrile, dichloromethane dimethylsulfoxide. The values diffusion coefficient reagents (MenFc MenFc+) redox calculated Randles-Sevcik equation, which are consistent with conclusion that "a one-e...