SSS 2010-10-06
时间：2019-01-08 作者：英语课 分类：Scientific American(十)月
This is Scientific American’s 60-Second Science, I’m Steve Mirsky. Got a minute?
The 2010 Nobel Prize in Chemistry goes to the University of Delaware’s Richard Heck, Purdue’s Ei-ichi Negishi and Hokkaido University’s Akira Suzuki for their work in developing new ways to synthesize complex organic molecules 1 by way of what are called palladium-catalyzed cross-couplings.
Two organic compounds that ordinarily would not readily react with other easily both bond to an atom of palladium. Carbon atoms on the two molecules, now in close proximity 2, bond to each other, forming a new compound.
Biochemist Lars Thelander at the announcement from the Royal Swedish Academy of Sciences: “Palladium-catalyzed cross-coupling has made it possible to synthesize carbon based molecules, for example, new medicines, agricultural chemicals and organic compounds used in the electronics industry.”
A prime example is discodermalide, produced naturally by a marine 3 sponge, but in very small quantities. After it was found to have anti-tumor properties, large quantities were able to be made using palladium-catalyzed cross-coupling.
Thanks for the minute, for Scientific American’s 60-Science, I’m Steve Mirsky.
- The structure of molecules can be seen under an electron microscope. 分子的结构可在电子显微镜下观察到。
- Inside the reactor the large molecules are cracked into smaller molecules. 在反应堆里，大分子裂变为小分子。
- Marriages in proximity of blood are forbidden by the law.法律规定禁止近亲结婚。
- Their house is in close proximity to ours.他们的房子很接近我们的。