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The Petri dish was developed by German physician Julius Richard Petri (after whom the name is given) while working as an assistant to Robert Koch at Berlin University.Petri did not invent the culture dish himself; rather, it was a modified version of Koch's invention [9] which used an agar medium that was developed by Walther Hesse. [10]
The basic design of the Petri dish has not changed since being created by Petri in 1887. [4] It was a challenge to keep dishes free of dust and extra bacteria that could collect and alter samples; heavy bell jars used for this purpose having proved ineffective, six years later Petri created a transparent plate slightly larger than the dish ...
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Sam's Choice, originally introduced as Sam's American Choice in 1991, is a retail brand in food and selected hard goods. Named after Sam Walton, founder of Walmart, Sam's Choice forms the premium tier of Walmart's two-tiered core corporate grocery branding strategy that also includes the larger Great Value brand of discount-priced staple items.
However, Petri dishes are sometimes used for mammalian cell culture as an alternative to tissue culture flasks. In that case the cells can be viewed using an Inverted microscope. Of course these dishes don't contain any agar which is one of the things that prevents you from using the same technique on a standard bacterial culture plate.
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