SSS 2009-01-15
时间：2019-01-08 作者：英语课 分类：Scientific American(一)月
This is Scientific American's 60-Second Science. I'm Adam Hinterthuer. Got a minute?
Forget the scalpel, researchers at Johns Hopkins University have created a tool that can move easily through tissue, potentially making biopsies much less invasive. They call it a "microgripper." And the wireless 1, dust-particle sized device is able to grab single living cells from hard-to-reach places. Their report appeared in the online early edition of the Proceedings 2 of the National Academy of Sciences.
The researchers assembled out of tiny metallic 3 plates a "palm" with six three-jointed "fingers." This metal hand is truly tiny: just one-tenth of a millimeter in diameter. In the lab, scientists used magnets to pilot the microgripper through a tube of animal tissue and up to a living cell. Then, by applying heat as a trigger, the joints 4 softened 5 and the "fingers" closed around the cell.
The researchers hope the device will have applications beyond cell retrieval. It could be used to manufacture microchips or deliver medicine to specific locations in the body. But first, they must refine its motor skills. Right now, the microgripper can only grab—it can’t let go. And we're still years away from shrinking Raquel Welch to go in after it.
Thanks for the minute for Scientific American's 60-Second Science. I'm Adam Hinterthuer.
- There are a lot of wireless links in a radio.收音机里有许多无线电线路。
- Wireless messages tell us that the ship was sinking.无线电报告知我们那艘船正在下沉。
- He was released on bail pending committal proceedings. 他交保获释正在候审。
- to initiate legal proceedings against sb 对某人提起诉讼
- A sharp metallic note coming from the outside frightened me.外面传来尖锐铿锵的声音吓了我一跳。
- He picked up a metallic ring last night.昨夜他捡了一个金属戒指。
- Expansion joints of various kinds are fitted on gas mains. 各种各样的伸缩接头被安装在煤气的总管道上了。
- Expansion joints of various kinds are fitted on steam pipes. 各种各样的伸缩接头被安装在蒸气管道上了。