SSS 2009-07-22
时间：2018-12-24 作者：英语课 分类：Scientific American(七)月
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 component 1 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 porous 2 with a large surface area, so the expanded PVA is a good material for cellular 3 scaffolding that can be implanted and on which tissues can regenerate 4. It can also be used for pills and dressings 5 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.
- 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。
- 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。
- 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。
- 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。