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.
Sign up for our Tech Decoded newsletter to follow the world's top tech stories and trends. Outside the UK? Sign up here.
。关于这个话题，heLLoword翻译官方下载提供了深入分析
This week, Jonathan Freedland speaks to Newsom about why he believes the Democrats suffered such heavy losses in 2024, why the party needs to be less judgmental, and whether he intends to run for president in 2028，更多细节参见搜狗输入法2026
メモリ高騰でPCの原価のうち35％をメモリが占めるほどに
Nature, Published online: 24 February 2026; doi:10.1038/s41586-026-10294-0