a brush with the law
a brief encounter or experience with the police because of a crime
The man had a brush with the law when he was young but now he is totally honest.
Precautions while using Centrifuge
Centrifuges can create aerosols and this must be considered with each use. The necessary precautions taken will depend upon what is being used. If hazardous materials such as carcinogens, highly toxic, or infectious agents will be placed in a centrifuge, then precautions must be taken to prevent an exposure of lab personnel to aerosols or liquids.