Fig 4. Cyclic voltammetry of Vero cells on pre-treated carbon electrodes after 72 hours of incubation in the absence of oxygen.

Inoculation with 15 000 cells; potential scan rate 10 mV.s^-1. Black: with cells; blue: controls without cells; in each case dotted lines are duplicates. Potentials are expressed vs. the DropSens pseudo-reference (DSref), values vs. SHE can be obtained by adding 0.290 V.