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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91视频
I suppose at this point, fermaw assumed he was dealing with someone who wasn’t going to just fuck off. And I wasn’t. It was as fun for me to try and beat as it was for him to develop.，这一点在同城约会中也有详细论述
В Финляндии предупредили об опасном шаге ЕС против России09:28