As the lag was primarily seen in a higher potential range during CV, the multiple peaks observed in G. The use of spectroscopic methods during potentiometric analysis has provided a new tool to directly measure the redox status of multiple cofactors in electrode-reducing bacteria. Such rates of apparent electron migration are easily achieved in redox polymer systems without addition of other conductive agents. The first cells to attach are able to double as fast as cells respiring soluble Fe III , and electron transfer rates per unit protein remain constant as new cells are added; 15 — 19 the work presented here shows that all cytochromes can be oxidized by the electrode. However, by identifying the causes of steps rate-limiting to electron transfer within this network, improvements to biofilm conductivity may not require such exhaustive knowledge. Such independent peak movement may confound electrochemical measurements aimed at tracking peak areas or location. All media were adjusted to pH 6. Bacterial strain, culture media, and biofilm growth: G. By plotting the derivative of the redox profile, only a slight flattening of the response was evident, but both forward and reverse scans remained centered on the same midpoint potential.
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