<tt id="6hsgl"><pre id="6hsgl"><pre id="6hsgl"></pre></pre></tt>
          <nav id="6hsgl"><th id="6hsgl"></th></nav>
          国产免费网站看v片元遮挡,一亚洲一区二区中文字幕,波多野结衣一区二区免费视频,天天色综网,久久综合给合久久狠狠狠,男人的天堂av一二三区,午夜福利看片在线观看,亚洲中文字幕在线无码一区二区
          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: 少妇高潮激情一区二区三| 国内精品一区二区不卡| 老色99久久九九爱精品| 国产天美传媒性色av高清| 国产黄色一区二区三区四区| 亚洲综合久久一区二区三区| 中文无码热在线视频| 成人国产精品中文字幕| 大伊香蕉精品视频在线| 色综合色综合久久综合频道| 中国农村真卖bbwbbw| 国产精品国产精品偷麻豆| 天堂影院一区二区三区四区| 欧美肥婆性猛交xxxx| 中文字幕日韩精品人妻| 色吊丝av中文字幕| 国产在线一区二区在线视频| 日韩成人无码影院| 国产亚洲精品aaaa片app| 人妻丝袜中文无码av影音先锋| 亚洲一区精品一区在线观看| 成人看的污污超级黄网站免费| 国产福利片一区二区三区| 宝贝腿开大点我添添公视频免| 久久发布国产伦子伦精品| 国产一区二区三区禁18| 欧美天天综合色影久久精品| 老熟妇老熟女老女人天堂| 亚洲亚洲人成综合网络| 亚洲中文字幕无码一久久区| 国产成人精品亚洲精品日日| 中文字幕一区二区三区在线不卡| 嫩草成人AV影院在线观看| 国产成人福利在线| 少妇人妻偷人偷人精品| 永久免费不卡在线观看黄网站| 国产一区二区精品久久岳| 国产精品午睡沙发系列| 日韩精品一区二区高清视频| 国产成人免费高清激情视频| 日韩黄色av一区二区三区|