Transient current voltage effects

Figure 4.11 Transient current and voltage waveforms showing effect of trapping and detrapping, (a) No trapping, (b) Trapping, no detrapping, (c) Trapping and detrapping (from Ref. [13]).

It does have an effect, i.e., a drop in "current" transiently as the tip enters the cell, and only if there is a flat plateau in the current-voltage curve do we consider it an absolute measurer of p02 It is especially troublesome in the beating heart where the action potential (intracellular) varies with the applied voltage. 

Blaustein and Goldman, using the voltage clamp technique, studied the effects of aluminum on action potential generation in lobster axons in vitro. When aluminum in concentrations as low as 0.03 mEq/L was substituted for calcium in the bathing medium, the action potential was blocked. They also observed a significant effect when aluminum was added to normal seawater. Aluminum caused a marked reduction of early transient current and also reduced the steady-state current. 

In this paper we report the effect of varying loads on a small size DMFC stack (10 cells with 9 cm active-area each). The transient responses of the stack voltage have been investigated upon variable current load conditions to obtain the information on the dynamic characteristics of the stack. Also, the transient responses of the stack current upon changing fuel flow rates have been monitored to obtain the optimal operating conditions for the staek. 

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