您現在的位置: > Language Tips > Audio & Video > Special Speed News  
 





 
Bringing nanotechnology to health care for the poor
[ 2007-03-05 10:05 ]

This is the VOA Special English Development Report.

Nanotechnology uses matter at the level of molecules and atoms. Researchers are finding different uses for particles with a length of one nanometer, or one-billionth of a meter. These include things like beauty products and dirt-resistant clothing. But one area where many experts believe nanotechnology holds great promise is medicine.

Last week, speakers at a program in Washington discussed using nanotechnology to improve health care in developing countries. The program took place at the Woodrow Wilson International Center for Scholars.

Peter Singer at the University of Toronto says a nanotechnology called quantum dots could be used to confirm cases of malaria. He says it could offer a better way than the traditional process of looking at a person's blood under a microscope.

In poor countries, this process is often not followed. As a result, sick people may get treated for malaria even if they do not have it. Such misuse of medicines can lead to drug resistance.

Quantum dots are particles that give off light when activated. Researchers are studying ways to program them to identify diseases by lighting up in the presence of a targeted molecule.

Experts say nanotechnology shows promise not just for diagnosing diseases, but also for treating them. Piotr Grodzinski of the National Institutes of Health talked about how nanotechnology could make drugs more effective.

He talked about cancer drugs already developed with nanotechnology. He says if a drug can target a cancer locally in the body, then much less of it might be needed, and that means lower side effects.

Andrew Maynard is chief scientist for the Project on Emerging Nanotechnologies at the Woodrow Wilson Center. He noted that Brazil, India, China and South Africa are currently doing nanotechnology research that could help poor countries.

But he also noted that there is some risk in using nano-materials. He says nanometer-sized particles behave differently in the body and the environment compared to larger particles. Experts say more investment in research is needed to better understand these risks.

And that's the VOA Special English Development Report, written by Jill Moss. I'm Steve Ember.


nanotechnology : 納米技術

點擊進入更多VOA慢速


(來源:VOA  英語點津姍姍編輯)

 
 
相關文章 Related Stories
 
         
 
 
 
 
 
         

 

 

 
 

48小時內最熱門

     

本頻道最新推薦

     
  McCain enters US 2008 presidential race
  《越獄》1(精講十二)
  Studying in the US: Rules about alcohol
  UN chief hopes US to do more about climate change
  Link between air pollution and heart disease

論壇熱貼

     
  “你太有才了”英文怎么說?
  校園英語迷你慣用語
  Is the homework fresh?
  how to say "職稱" in english?
  糾錯語料庫:品牌意識
  請大家幫助找錯 - 幫專家糾錯




主站蜘蛛池模板: 99国产在线视频| 久久精品无码一区二区三区不卡| 中国老人倣爱视频| 精品人妻系列无码一区二区三区| 国产精品中文久久久久久久| 久久狠狠高潮亚洲精品| 激情内射日本一区二区三区| 国产三级电影免费观看| 18女人水真多免费高清毛片| 少妇粉嫩小泬喷水视频| 久久精品道一区二区三区| 浮力国产第一页| 四虎成人精品在永久免费| 1000部拍拍拍18勿入免费视频软件 | 久久精品视频99| 毛片视频网站在线观看| 变态Sm天堂无码专区| 成人免费大片免费观看网站| 国内精品久久久久伊人av| 二区久久国产乱子伦免费精品| 男人j桶女人j免费视频| 国产一级在线播放| 亚洲成熟人网站| 在线天堂新版在线观看| 中出视频在线观看| 日韩人妻一区二区三区免费 | 免费人成在线观看网站视频| 调教贱奴女警花带乳环小说| 国产精品二区三区免费播放心| av无码免费永久在线观看| 成人性生交大片免费看| 亚洲欧美另类色图| 精品国产欧美一区二区| 国产精品视频久久| 一本到视频在线| 日日躁夜夜躁狠狠躁超碰97| 亚洲一区二区三区免费观看| 毛茸茸bbw亚洲人| 免费播看30分钟大片| 色94色欧美一区| 国内精品伊人久久久久妇|