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.
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Bill Clinton, however, has emerged as a top target for Republicans amid the political struggle over who receives the most scrutiny for their ties to Epstein. Several photos of the former president were included in the first tranche of Epstein files released by the Department of Justice in January, including a number of him with women whose faces were redacted. Clinton has not been accused of wrongdoing in his relationship with Epstein.，推荐阅读51吃瓜获取更多信息