3.6. Electron microscopy
In Fig. 6 the microstructure of carrots before and after treatment
with ozone is shown. In Fig. 6a, the carrot tissue is shown free of
any microorganism. However, Fig. 6b-d show how the cells of
E. coli spread out into the tissue. Even though these images were
taken after processing with ozone, bacterial cells seem to be
attached to the tissue and some of them are protected under the
folds of the tissue. According to microbiological counts, less than 1
log-reduction was achieved after 15 min of treatment with ozone,