The Petri dish or culture plate is a round container, made of glass or polystyrene with a lid in the same material, of different diameters (the diameters being more common around ten centimeters), with a low bottom, with a cover of the same shape than the plate, but slightly larger in diameter, so that it can be placed on top and close the container. It was invented by Julius Richard Petri in 1887. It is used in laboratories mainly in the culture of bacteria or other microorganisms, covering the bottom with different culture media (eg agar gel) depending on the microorganism to be used. to cultivate.
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