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.
1. 前置环境要求 (Prerequisites)，详情可参考Line官方版本下载
。同城约会是该领域的重要参考
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"It's a support for women who maybe don't know what's going on with their bodies."
7Julius Petri once wrote: “These shallow dishes are particularly recommended for agar plates…Counting the grown colonies is also easy.” (Translated by Corrado Nai from the original, 1887 German manuscript.)