Cell survival and deoxyribonucleic acid (DNA) degradation wave measured for wild-type Escherichia coli B251 cells after exposure to different concentrations of ozone. The results show that extensive breakdown of DNA occurs after ozonation and that the extent of ozone-induced DNA degradation generally correlates with the colony-forming ability of the cells.

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Identification of canine adenovirus-1 ( CAV -1) and canine adenovirus-2 ( CAV -2) strains was done by electrophoresis of restriction endonuclease-fragmented viral DNA. Results obtained with this sensitive and reproducible technique clearly show that CAV -2 is not a variant of CAV -1 but a distinct virus.