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SSS 2008-10-08

时间:2010-05-15 02:36来源:互联网 提供网友:木渐浅。   字体: [ ]
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    (单词翻译:双击或拖选)

This is Scientific American's 60-Second Science. I'm Steve Mirsky . Got a minute ?

 

The Nobel Prize in chemistry goes to three men who revolutionized molecular1 life science, Japan’s Osamu Shimomura and Americans Martin Chalfie and Roger Tsien. They developing tools to light up and see individual proteins inside living cells. These tiny molecular flashlights make it possible to study numerous events that take place in cells and whole organisms that were previously2 invisible—such as the development of nerve cells or the spread of cancer cells.

In 1962 Shimomura, now emeritus3 professor at the Marine4 Biological Laboratory at Woods Hole, discovered that jellyfish produce a green fluorescent5 protein, GFP, that glows when exposed to ultraviolet light. Some 30 years later, Columbia University’s Chalfie showed that the GFP gene6 could be put into any organism. By making sure the fluorescent protein was expressed at the same time as other proteins of interest, researchers could literally7 light up events they want to follow. Then Tsien, at the University of California, San Diego, engineered fluorescent proteins in various colors. The multicolor palette enables researchers to follow multiple biological processes at the same time.

 

Thanks for the minute for Scientific American's 60-Second Science. I'm Steve Mirsky .

 


点击收听单词发音收听单词发音  

1 molecular mE9xh     
adj.分子的;克分子的
参考例句:
  • The research will provide direct insight into molecular mechanisms.这项研究将使人能够直接地了解分子的机理。
  • For the pressure to become zero, molecular bombardment must cease.当压强趋近于零时,分子的碰撞就停止了。
2 previously bkzzzC     
adv.以前,先前(地)
参考例句:
  • The bicycle tyre blew out at a previously damaged point.自行车胎在以前损坏过的地方又爆开了。
  • Let me digress for a moment and explain what had happened previously.让我岔开一会儿,解释原先发生了什么。
3 emeritus ypixp     
adj.名誉退休的
参考例句:
  • "Perhaps I can introduce Mr.Lake Kirby,an emeritus professor from Washington University?"请允许我介绍华盛顿大学名誉教授莱克柯尔比先生。
  • He will continue as chairman emeritus.他将会继续担任荣誉主席。
4 marine 77Izo     
adj.海的;海生的;航海的;海事的;n.水兵
参考例句:
  • Marine creatures are those which live in the sea. 海洋生物是生存在海里的生物。
  • When the war broke out,he volunteered for the Marine Corps.战争爆发时,他自愿参加了海军陆战队。
5 fluorescent Zz2y3     
adj.荧光的,发出荧光的
参考例句:
  • They observed the deflections of the particles by allowing them to fall on a fluorescent screen.他们让粒子落在荧光屏上以观察他们的偏移。
  • This fluorescent lighting certainly gives the food a peculiar color.这萤光灯当然增添了食物特别的色彩。
6 gene WgKxx     
n.遗传因子,基因
参考例句:
  • A single gene may have many effects.单一基因可能具有很多种效应。
  • The targeting of gene therapy has been paid close attention.其中基因治疗的靶向性是值得密切关注的问题之一。
7 literally 28Wzv     
adv.照字面意义,逐字地;确实
参考例句:
  • He translated the passage literally.他逐字逐句地翻译这段文字。
  • Sometimes she would not sit down till she was literally faint.有时候,她不走到真正要昏厥了,决不肯坐下来。
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