TABLE 1.

Quantitative characterization of EET reaction rate to DHNA and riboflavin^a

Condition	Mean ± SD max current density (μa/cm2)	Half-time to max current density (s)
DHNA
0.2 μg/mL	15.86 ± 2.82	792
20 μg/mL	70.36 ± 1.55	14.4
Riboflavin
0.2 μg/mL	24.32 ± 0.22	3,096
2 μg/mL	45.02 ± 1.80	2,988
20 μg/mL	55.17 ± 5.26	684

^aL. plantarum was grown in microaerobic 3-chamber bioelectrochemical reactors for 3 h on an electrode poised at 0.2 V versus Ag/AgCl (3 M KCl) before the indicated concentration of riboflavin or DHNA was injected. Current density measurements were taken every 36 s for 24 h. Half-time was determined as 1/2 the time at which maximum current was achieved. Data are representative of 3 bioreactors.