男女羞羞视频在线观看,国产精品黄色免费,麻豆91在线视频,美女被羞羞免费软件下载,国产的一级片,亚洲熟色妇,天天操夜夜摸,一区二区三区在线电影
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: 尼玛县| 宜君县| 花垣县| 舟曲县| 清原| 大洼县| 寿阳县| 长春市| 通化县| 罗城| 宝丰县| 呼图壁县| 高青县| 鄯善县| 德清县| 延边| 拜泉县| 剑河县| 临洮县| 灯塔市| 内黄县| 南汇区| 周口市| 金乡县| 年辖:市辖区| 彩票| 横峰县| 汝南县| 共和县| 黄平县| 剑阁县| 阿克苏市| 北碚区| 隆化县| 南汇区| 松阳县| 宜丰县| 海城市| 乐东| 高要市| 武平县| 毕节市| 神木县| 西丰县| 昂仁县| 隆林| 岳阳市| 马公市| 泽州县| 万年县| 靖宇县| 杭锦后旗| 石台县| 高雄市| 鲁甸县| 南召县| 苗栗县| 疏勒县| 方城县| 临泉县| 洛隆县| 泾源县| 郁南县| 新宾| 泽州县| 闸北区| 横峰县| 遂平县| 道孚县| 陆丰市| 开化县| 天全县| 金门县| 永宁县| 宝坻区| 黄平县| 临江市| 平凉市| 高安市| 龙州县| 策勒县| 嘉黎县|