SSS 2011-03-29
时间：2018-12-24 作者：英语课 分类：Scientific American(三)月
This is Scientific American’s 60-Second Science. I’m Steve Mirsky. Got a minute?
To keep your car purring, you have to change the oil. Such maintenance produces eight billion gallons of used motor oil annually 1. Some waste oil does get re-refined to produce oil for lubrication or heating. And some just gets dumped. So it would be more environmentally friendly and provide fresh fuel if we could convert the old motor oil to something really valuable: new gasoline. And that’s what a research team thinks they’ve done. They presented their work at the annual meeting of the American Chemical Society.
Their approach involves pyrolysis, decomposing 2 organic material with heat in the absence of oxygen. Pyrolysis can break down waste oil into gases, liquids, a little bit of solids. The gases and liquids can be converted into gas or diesel 3. But conventional pyrolysis methods don’t do a great job with motor oil.
The new technique mixes the oil with a material really good at absorbing microwave radiation. Tests showed that heating this mixture with microwaves was about 90 percent efficient at creating precursors 4 to fuel—which beats tossing the oil down the drain.
Thanks for the minute. For Scientific American’s 60-Second Science, I’m Steve Mirsky.
- Many migratory birds visit this lake annually.许多候鸟每年到这个湖上作短期逗留。
- They celebrate their wedding anniversary annually.他们每年庆祝一番结婚纪念日。
- The air was filled with the overpowering stench of decomposing vegetation. 空气中充满了令人难以忍受的腐烂植物的恶臭。
- Heat was obtained from decomposing manures and hot air flues. 靠肥料分解和烟道为植物提供热量。
- We experimented with diesel engines to drive the pumps.我们试着用柴油机来带动水泵。
- My tractor operates on diesel oil.我的那台拖拉机用柴油开动。
- Phenyl (or polyphenyl) substituted epoxides serve as excellent precursors to phenyl (or diphenyl) carbenes. 某些苯代（或多苯）环氧乙烷是制取带苯环（或二苯）碳烯的极好原料。 来自辞典例句
- Note the presence of megakaryocytes, erythroid islands, and granulocytic precursors. 可见巨核细胞，红细胞岛和粒细胞前体细胞。 来自互联网