3.2. Electroanalytical performance of the NADH sensorAmperometric technique was used to determine NADH by applying a potential of 300 mV and the resulting calibration plots reflect the sensitivity of SWNT-GC electrodes for the range of concentration explored (Fig. 2).Figure sellectchem 2.Calibration curve of PXD101 SWNT-GC electrode using successive addition of NADH (E = 300 mV vs. Ag/AgCl).After each addition of NADH, the anodic current increased and reached a steady state within 4 s. The sensitivity is about 4.6 mA/M (with a SD of ��0.25, for n=3), a linear response range is Inhibitors,Modulators,Libraries observed up to 3 mM NADH and a detection limit of 0.5 ��M (based on signal/noise = 3) was calculated.

The oxidation of NADH was shown to occur at lower potential at
PEMFC (Proton Exchange Membrane Fuel Inhibitors,Modulators,Libraries Cell) using very thin polymer membrane has been considered Inhibitors,Modulators,Libraries as a Inhibitors,Modulators,Libraries promising candidate of future power sources for transportation application and residential power.

This type of fuel cell has many advantages such as high efficiency, clean, quiet, low temperature operation, and quick startup capability. However its performance and durability under Inhibitors,Modulators,Libraries harsh environments and high cost should be optimized to be competitive to conventional combustion power plants[1-3].Typical schematics of a Proton Exchange Membrane Inhibitors,Modulators,Libraries Fuel Cell (PEMFC) is shown in Figure 1-(a) The cell is a sandwich of two graphite bipolar plate with micro flow channels separated by MEA(Membrane Electrode Assembly) which consists of a membrane and two electrodes with dispersed Pt catalyst.

The gas diffusion layer Inhibitors,Modulators,Libraries (GDL) is porous to supply reactants to the electrodes at unexposed areas of micro flow channel [4].

Figure 1.Schematics of a fuel cell assembly displaying different essential components of the system (a) and micro serpentine bipolar Inhibitors,Modulators,Libraries flow plate (b).As shown Figure 1-(b), the typical micro serpentine AV-951 bipolar flow plates in fuel cells contain many micro flow channels that distribute the reactant gas flow over the catalytic reactive surface. The shape, size Entinostat and pattern of the micro flow channels were known to greatly affect the fuel cell performance.

Modeling and simulation of the heat and mass transport in micro channel are being used extensively in researches and industrial applications selleck screening library to gain better understanding of the fundamental processes of fuel cell and to optimize fuel cell designs before building a prototype for engineering application.

The Ganetespib price first application of CFD (Computational Fluid Dynamic method) to PEMFC focused on one dimensional model by Bernard and Verbrugge[5-6] and Springer[7], who presented several important principles related to the electrochemical reaction process in fuel cell. Recently, a two dimensional model emphasizing the effects of two-phase water and heat transport was developed by Fuller and Newman[8], Nguyen and White[9] and Gurau and Liu[10].