Resembling a low-tech, gravitation/settle plate, a small, rotating mechanism is placed windward, and aerosol particles will adhere to the sampling or petri dish.
After obtaining the genes from a laboratory which creates genetic sequences on demand, he implanted the genes into e.coli bacteria, which he then grew in a petri dish.
The weakening hold of pragmatism acted as a Petri dish allowing for new concepts such as communitarianism to implant itself in the national consciousness.
When the filter is placed in a sterile petri dish and saturated with an appropriate medium, growth of the desired organisms is encouraged, while that of other organisms is suppressed.
