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the claim

Defined growth media contain a known chemical composition.

the verdict
SUPPORTED
the evidence backs this
Recorded sources
5 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that defined growth media contain a known chemical composition?

Yes. Defined growth media are specifically formulated to have a completely known chemical composition, with exact concentrations of every ingredient identified.

Verdict: SUPPORTED · 5 sources for, 0 against · Last checked

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Judged against reference works: claims of this kind are settled by reference works, not journal abstracts.

Evidence for · 5
Wikipedia: Growth medium
Reference article covering this claim directly
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Wikipedia: Growth medium. (n.d.). Wikipedia. https://en.wikipedia.org/wiki/Growth_medium

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More for · 4
Wikipedia: Chemically defined medium
Reference article covering this claim directly
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Wikipedia: Chemically defined medium. (n.d.). Wikipedia. https://en.wikipedia.org/wiki/Chemically_defined_medium

2 recorded entries grouped as this source

Additional records of the same source are shown below. They are not counted as additional sources.

Wikipedia: Wikipedia: Chemically defined medium
States that chemically defined media require all components to be identified and exact concentrations known.
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Wikipedia: Wikipedia: Chemically defined medium. (n.d.). Wikipedia. https://en.wikipedia.org/wiki/Chemically_defined_medium

PLOS (all journals): MediaDB: A Database of Microbial Growth Conditions in Defined Media
Describes chemically defined media formulations listing names and amounts of each compound.
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PLOS (all journals): MediaDB: A Database of Microbial Growth Conditions in Defined Media. (n.d.). PLOS (all journals). https://doi.org/10.1371/journal.pone.0103548

LibreTexts: LibreTexts: 8.6: Media Used for Bacterial Growth
Explains that when complete chemical composition is known, it is called a chemically defined medium.
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LibreTexts: LibreTexts: 8.6%3A Media Used for Bacterial Growth. (n.d.). LibreTexts. https://bio.libretexts.org/Courses/Portland_Community_College/Cascade_Microbiology/08%3A_Microbial_Growth/8.6%3A_Media_Used_for_Bacterial_Growth

OpenStax: OpenStax Microbiology: 9.6 Media Used for Bacterial Growth
Notes that when the complete chemical composition of a medium is known, it is a chemically defined medium.
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OpenStax: OpenStax Microbiology: 9.6 Media Used for Bacterial Growth. (n.d.). OpenStax. https://openstax.org/books/microbiology/pages/ad652a22-f0c2-4569-a6ee-9fe3fac98e90@

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