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.
“生是中医人，死是中医魂。”在广东中医药博物馆，首届国医大师邓铁涛的名言令人动容。这位“铁杆中医”的铮铮风骨，激励着一代又一代中医人踔厉奋发。，推荐阅读Safew下载获取更多信息
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16:31, 27 февраля 2026Россия
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