Guar gum, a plant colloid, costs less than agar and is better suited for growing thermophilic bacteria, but is also more difficult to handle, being more viscous and less transparent. The bacterial polysaccharide xanthan is cheaper as well but forms weaker jellies that, as with carrageenan, might result in puncturing its surface. Other colloids, like alginate (from brown seaweed) and gellan gum (from a bacterium), don’t set solely based on temperature and require additives for gelation. These additives might interfere with microbial growth and make the preparation of those jellies less handy than agar plates.
"Huh, that's strange. Trump's DOJ did that?" Lydic said. "The same DOJ that promised to release the Epstein files and then gave influencers binders filled with old documents and they wouldn't release more, so Congress had to pass a law saying that they had to, but they still missed the deadline to release the files, and then when they finally did, the files were riddled with sketchy redactions? That DOJ? Nah, I can't see it."
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Stirling Council