Fig. 4. a) Inactivation of E. coli in (:) carrots, (-) lettuce and (C) tomatoes using
ozone at 5 ppm; (b) profile of temperature during disinfection of vegetables with
ozone, (6) carrots, (,) lettuce and (B) tomatoes. Each experiment was run at least in
duplicate and at least five samples were analyzed in each experiment. Initial count was
107
e108 cfu/m