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Nature staff discuss some of the week’s top science news.
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The delivery giant issued the statement after filing a lawsuit in the US Court of International Trade, asking the Trump administration for a "full refund" of tariff payments. Though FedEx covers the cost of duties and tariffs on a customer's behalf when packages arrive in the US, it bills customers …
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.
“全国人大代表的身份，把我从一条生产线、一家企业，带到了更广阔的行业视野里。我有责任让那些平时在车间里、在水塘边听到的诉求被听见、被重视、被推动解决。”过去一年，陈阳曾到广东多个地市，开展海洋牧场建设、绿美广东生态建设、促进循环经济高质量发展等多个专题调研。当前，陈阳正把更多精力投向3个关键词：健康养殖、生态平衡、投入品安全。