软疣性肉瘤

Murchison Meteorite's Chemical Bonanza The 1969 Murchison meteorite was known to harbor complex organic compounds, but a new analysis in Proceedings of the National Academy of Sciences finds that it may also contain millions of chemicals and shed lig

发表于:2019-01-02 / 阅读(94) / 评论(0) 分类 60秒科学

This book stinks! is really a bad review. But even a classic work can start to smell when it gets old enough. Now chemists have developed a technique that identifies what kind of degradation process an old book or historical document is going through

发表于:2019-01-08 / 阅读(52) / 评论(0) 分类 Scientific American(十一)月

This is Scientific Americans 60-Second Science, Im Steve Mirsky. Got a minute? The 2010 Nobel Prize in Chemistry goes to the University of Delawares Richard Heck, Purdues Ei-ichi Negishi and Hokkaido Universitys Akira Suzuki for their work in develop

发表于:2019-01-08 / 阅读(67) / 评论(0) 分类 Scientific American(十)月

Air pollution 空气污染 A: I've heard of ground-level ozone but can you explain what it is exactly? A:我听说近地面臭氧,但是你能确切解释一下是什么吗? B:Yes, it's one of the main air pollutants. Factories don't emit it dire

发表于:2019-01-14 / 阅读(38) / 评论(0) 分类 职业技术英语口语

Judging a Book by Its Odor A study in the journal Analytical Chemistry identifies various organic compounds that old books give off and that can be analyzed noninvasively, offering important clues to an historic work's condition and prognosis. Steve

发表于:2019-01-30 / 阅读(143) / 评论(0) 分类 60秒科学

Wildfires Spike Wine with Smoky Notes The fires that ripped across Napa and Sonoma last year damaged some two dozen wineries, and burned others completely to the ground. 去年发生在纳帕和索马诺的大火损毁了二十多家酒厂,并将其他

发表于:2019-02-13 / 阅读(50) / 评论(0) 分类 2018年科学美国人2月