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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除 Pohlen 外，Jimmy Ba 和 Tony Wu 于本月早些时候离职，Greg Yang 上月因确诊莱姆病宣布退居幕后；而 Kyle Kosic、Igor Babuschkin 和 Christian Szegedy 则已于 2024 年至 2025 年间相继退出。
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Alison Francis,Senior Science Journalist