Sponsors have been able to download OS 8.1.1 release candidates since last week, so if getting things before anyone else is important to you, consider sponsoring us on GitHub
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.
，详情可参考heLLoword翻译官方下载
Daniel Larlham Jr.
Nick TriggleHealth correspondent