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A typical Petrifilm plate has a 10 cm(H) × 7.5 cm(W) bottom film which contains a foam barrier accommodating the plating surface, the plating surface itself (a circular area of about 20 cm 2), and a top film which encloses the sample within the Petrifilm. A 1 cm × 1 cm yellow grid is printed on the back of the plate to assist enumeration.
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]
I took a quick scan of some online dictionaries. Most of them do not capitalize "petri dish". chouhouzi 14:17, 10 DEC 2008 Most paper dictionaries do not capitalize either, nor is capitalization the common usage in scientific writing. The article has been fixed. Piperh 19:29, 12 July 2009 (UTC) Petri should not contain a capital P.
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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, and heavy bell jars used for this purpose having proved ineffective, six years later Petri created a transparent plate slightly larger than then ...
The Republican-controlled House of Representatives passed a rules package on Friday that will make it far more difficult to remove a speaker, among other provisions.. Under the new rules package ...
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