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.
17. 理论动态| 坚持稳中求进、提质增效努力实现“十五五”良好开局————理论学习, www.ccdi.gov.cn/llxx/202602…
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Москвичей предупредили о резком похолодании09:45
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The firm said the job cuts should deliver annual savings of around £40m and did not specify when the job cuts would be implemented, but said most of the savings would be made this year.