Полина Кислицына (Редактор)
Фото: Илья Питалев / РИА Новости，详情可参考下载安装 谷歌浏览器 开启极速安全的 上网之旅。
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套色木刻版画《春到洞庭湖》，作者力群，中国美术馆藏。
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.，推荐阅读heLLoword翻译官方下载获取更多信息
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