The system uses plasma to briefly turn oxygen inside sealed packaging into ozone in order to sterilise food.

BBC: Plasma device developed to 'sterilise' food

It then generates plasma to split the bonds between oxygen molecules inside the packaging, which then reform as ozone.

BBC: Plasma device developed to 'sterilise' food

Dr Jiang reckoned that a cold plasma, particularly one rich in oxygen ions (which are notoriously destructive of organic materials), would be enough to do the job of breaking up a biofilm without harming the patient.

ECONOMIST: Using a plasma torch to clean your teeth