Just not to add any aerated contaminant to the culture present in tube or Petri dish
Petri dish.
The closer you can keep it near the flame, the less like for an accidental contamination of the plate.
The only culture medium I know are called petri dishes. The bottom is coated with a media that encourages growth, if any bacteria are present in the specimen. The petri dish remains covered/closed and placed in an area that incubates the specimen. IF bacteria are present, it will grow and multiply into colonies often big enough to see with the naked eye, i.e. without a microscope.
Serve as a platform on which to place a slide culture
Petri Sarvamaa's birth name is Petri Ilari Sarvamaa.
Miguel Petri's birth name is Miguel Angel Petri.
Petri Liski's birth name is Petri Juhana Liski.
Petri Rajala's birth name is Petri Kimmo Juhani Rajala.
Petri Hohenthal's birth name is Nils Petri Bogislaus Hohenthal.
August Petri was born in 1878.
Petri Matikainen was born in 1967.
Petri Keskitalo was born in 1967.