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SSS 2009-07-22

时间:2010-05-18 05:38来源:互联网 提供网友:mark@li   字体: [ ]
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This is Scientific American 60-Second Science. I'm Cindey Graber. This will just take a minute.

 

When TV sets die, they usually end up incinerated or in landfills. But now researchers from England’s University of York believe they’ve found a valuable use for told TVs—in medicine.

Liquid crystal displays—or LCDs—are becoming increasingly popular. One key component1 of the display is a compound called polyvinyl-alcohol, or PVA. The researchers recovered the PVA from television screens. They then heated the material in water with microwaves, cooled it back down and washed it with ethanol. That process creates a new material called expanded PVA. And our bodies fail to mount an immune response against expanded PVA, so it’s a good substance for biomedical applications.

It’s porous2 with a large surface area, so the expanded PVA is a good material for cellular3 scaffolding that can be implanted and on which tissues can regenerate4. It can also be used for pills and dressings5 that deliver drugs. The research was published in the journal Green Chemistry.

The study authors say billions of televisions with LCD technology are nearing the end of their lives. Which means that medical dramas that once played out on the TVs may soon come from the TVs.

 

Thanks for the minute. For Scientific American 60-Second Science, I'm Cindey Graber.
 


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1 component epSzv     
n.组成部分,成分,元件;adj.组成的,合成的
参考例句:
  • Each component is carefully checked before assembly.每个零件在装配前都经过仔细检查。
  • Blade and handle are the component parts of a knife.刀身和刀柄是一把刀的组成部分。
2 porous 91szq     
adj.可渗透的,多孔的
参考例句:
  • He added sand to the soil to make it more porous.他往土里掺沙子以提高渗水性能。
  • The shell has to be slightly porous to enable oxygen to pass in.外壳不得不有些细小的孔以便能使氧气通过。
3 cellular aU1yo     
adj.移动的;细胞的,由细胞组成的
参考例句:
  • She has a cellular telephone in her car.她的汽车里有一部无线通讯电话机。
  • Many people use cellular materials as sensitive elements in hygrometers.很多人用蜂窝状的材料作为测量温度的传感元件。
4 regenerate EU2xV     
vt.使恢复,使新生;vi.恢复,再生;adj.恢复的
参考例句:
  • Their aim is to regenerate British industry.他们的目的是复兴英国的工业。
  • Although it is not easy,you have the power to regenerate your life.尽管这不容易,但你有使生活重获新生的能力。
5 dressings 2160e00d7f0b6ba4a41a1aba824a2124     
n.敷料剂;穿衣( dressing的名词复数 );穿戴;(拌制色拉的)调料;(保护伤口的)敷料
参考例句:
  • He always made sure that any cuts were protected by sterile dressings. 他总是坚持要用无菌纱布包扎伤口。 来自辞典例句
  • I waked the orderly and he poured mineral water on the dressings. 我喊醒勤务,他在我的绷带上倒了些矿质水。 来自辞典例句
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