Parallel conductance (electric current flow through surrounding tissue) is an important determinant of accurate measurements of arterial lumen diameter, using the conductance method. The present study is focused on the role of non-uniform geometrical/electrical configurations of surrounding tissue, which are a primary source of electric current leakage. Computational models were constructed to ...

Electric behavior of biological cells is driven by ion transport through the membrane induced by specific proteins. The cable model classically describes the membrane potential dynamics by analogy with an electrical circuit. We show the failure of this description when the various ion species get different diffusion times. The pertinent parameter which describes the membrane electrical stabilit...

OBJECTIVE Intercellular conduction of electrical signals underlies spreading vasodilation of resistance arteries. Small- and intermediate-conductance Ca(2+)-activated K(+) channels of endothelial cells serve a dual function by initiating hyperpolarization and modulating electrical conduction. We tested the hypothesis that regulation of electrical signaling by small- and intermediate-conductance...

Electron transport properties of B-fullerenes, B80 and B100, are investigated with the use of the first-principles density functional theory (DFT), in conjunction with the Landauer-Büttiker formalism and compared with C-fullerene, C60, under similar conditions. The differential conductance and the tunnel current for B-fullerenes sandwiched between Au contacts are calculated to be much higher th...

The one-dimensional structure of carbon nanotubes leads to a variety of remarkable optical and electrical properties that could be used to develop novel devices. Recently, the electrical conductance of nanotubes has been shown to decrease under optically induced heating by an amount proportional to the temperature change. Here, we show that this decrease is also proportional to the initial nano...

We propose an objective and robust method to extract the electrical conductance of single molecules connected to metal electrodes from a set of measured conductance data. Our method roots in the physics of tunneling and is tested on octanedithiol using mechanically controllable break junctions. The single molecule conductance values can be deduced without the need for data selection.

BACKGROUND/PURPOSE Water absorption is important for the overall function of keratinized tissues like the stratum corneum and nail. Hence, measurement of water sorption dynamics and water content of these tissues is of great interest. METHODS We have studied water sorption and electrical properties of a human nail in a measuring cell where the temperature and relative hydration could be contr...

One of the main factors that impacts the efficiency of solar cells is due to the scattering of electrons inside the cells. Carbon nanotubes (CNTs) have proposed to use in solar cells due to their ballistic transport properties: electrons travel through CNTs without experiencing scattering or experiencing negligible scattering. The conductance of CNTs is shown to be quantized and has a multiple ...