1)
From the experimental aspect:
Because the concentration of
agar
in the same
dish
is the same everywhere in the experiment, the rate of diffusion of various substances, e.g., nutrients, etc., is equal in all
directions.
Direction
is equal. In other words, the shape
of the substance diffusing out of the petri dish
is
circular
. Plus
colonies
are also circular. So, designing the petri dish as a circle facilitates the complete diffusion of the substance of the experiment throughout the dish, favoring the conduct of scientific experiments that require
controlled variables
.
2)By the durability of the equipment and
laboratory
hygiene considerations:
Round petri dishes have no
corners
, easy to clean, there will be no experimental
bacterial flora
and other
residues
accumulation of Petri dishes
.
corner
positions causing contamination and affecting subsequent experiments.
Additionally, petri dishes are usually sterilized by
steam
pots or fire baking
high-temperature
methods, and without the corners, the petri dish won't be cracked due to thermal expansion and contraction.
3)Consideration by ease of production:
Early petri dishes were made of
glass
, and round shapes are easier to produce than other shapes with corners, such as
square
, because the corners are very easy to break or wear out during the demolding and cooling
process
. wear and tear.
Thanks for the adoption !!!! (: