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This is Scientific American's 60-Second Science. I'm Christopher Intagliata. Got a minute? Asbestos increases the risk for certain cancers. The fibers are thought to do so by skewering cells, setting off chemical reactions that lead to inflammation,

发表于:2018-12-24 / 阅读(68) / 评论(0) 分类 Scientific American(九)月

Nano Tool Watches Teardrop Protein Destroy Bacteria About a hundred years ago, a Scottish biologist discovered that proteins called lysozymes in human tears can kill bacteria. Scientists have studied the enzyme extensively, but molecular biologist Gr

发表于:2019-01-13 / 阅读(40) / 评论(0) 分类 VOA标准英语2012年(一月)

At the same time, methanogens can use hydrogen and carbon dioxide produced by other bacteria to generate methane, 同时,产甲烷菌可以使用其他细菌产出的氢和二氧化碳以生成甲烷, which can reduce the total volume of gas by u

发表于:2019-01-17 / 阅读(53) / 评论(0) 分类 TED演讲教育篇

By Tom Rivers London 05 October 2009 Three U.S.-based scientists have won the 2009 Nobel prize for medicine for their discovery into how chromosomes are copied and protected. The work casts important light on cancer and the aging process. . Elizabet

发表于:2019-02-06 / 阅读(57) / 评论(0) 分类 VOA标准英语2009年(十月)

Rev Up Photosynthesis To Boost Crop Yields 提高光合作用能使作物增加产量 Photosynthesis is surprisingly inefficient, only of the order of one to two percent. And one of the main culprits is an enzyme called RuBisCo. 光合作用效率低得

发表于:2019-02-14 / 阅读(40) / 评论(0) 分类 2018年科学美国人4月

本期内容: The 2018 Nobel Prize in Chemistry has been awarded to three scientists for their discoveries in enzyme research. Americans Frances Arnold and George P Smith will share the prize with Briton Gregory Winter, who is based at Cambridge Un

发表于:2019-02-20 / 阅读(33) / 评论(0) 分类 夏说英语新闻晨读
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