19版 - 深圳方方乐趣中英文学校 以教育为桥,以文化为基,培育时代新人

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Dec 06 20237th Dec 2023

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专利创造有力支撑了我国加快实现高水平科技自立自强。截至2025年底,我国国内高价值发明专利拥有量达到229.2万件,其中七成属于战略性新兴产业。比如,我国拥有全球60%的人工智能专利,机器人相关专利数量占全球比重约2/3,绿色低碳技术的PCT(专利合作条约)国际专利申请公开量连续多年位居世界第一,成为我国加快发展新质生产力的有力注脚。

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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.