Fig. 3From: Analysis of bioavailable toluene by using recombinant luminescent bacterial biosensors with different promotersa Effects of incubation temperature on luminescence of T7-lux-E. coli induced by 100 μM toluene for 2 h. b Effects of ionic strength on the luminescence of T3-lux-E. coli, SP6-lux-E. coli and T7-lux-E. coli induced by 100 μM toluene for 2 h (T3-lux-E. coli and T7-lux-E. coli) or 1 h (SP6-lux-E. coli)Back to article page