Fig. 1
From: Detection of viable but non cultivable Escherichia coli after UV irradiation using a lytic Qβ phage
Kinetics of Escherichia coli ATCC 13965 inactivation following exposure to UV-C irradiation according to Chick-Watson model. y axis: reduction = N/N 0 where N is the number of viable and cultivable cell after exposure to UV-C irradiation and N 0 is the number of viable and cultivable cell before exposure to UV light; x axis = I n t where I is UV intensity (mW/cm2), t is exposition time (s), n is threshold level of series-event model, and n = 1 for the first order Chick–Watson model where error bars are not shown; differences between duplicates were not detected