智能手机可改装成手持生物传感器-凯发k8官网

智能手机可改装成手持生物传感器
文章来源:未知 文章作者:enread 发布时间:2013-05-27 08:41 字体: [ ] 
(单词翻译:双击或拖选)
researchers and physicians in the field could soon run on-the-spot tests for environmental 1, medical diagnostics, food safety and more with their smartphones. university of illinois at urbana-champaign researchers have developed a cradle and app for the iphone that uses the phone's built-in camera and processing power as a biosensor to detect toxins, proteins, bacteria, viruses and other 2.
 
having such sensitive biosensing 4 in the field could enable on-the-spot tracking of groundwater contamination, combine the phone's gps data with biosensing data to map the spread of pathogens, or provide 5 and inexpensive medical diagnostic tests in field clinics or contaminant checks in the food processing and distribution chain.
 
"we're interested in biodetection that needs to be performed outside of the laboratory," said team leader brian cunningham, a professor of electrical and computer engineering and of bioengineering at the u. of i. "smartphones are making a big impact on our society -- the way we get our information, the way we communicate. and they have really powerful 6 7 and imaging. a lot of medical conditions might be monitored very inexpensively and non-invasively using mobile platforms like phones. they can detect 8 things, like pathogens, disease biomarkers or 9, things that are currently only done in big diagnostic labs with lots of expense and large volumes of blood."
 
the wedge-shaped cradle contains a series of optical 10 -- lenses and filters -- found in much larger and more expensive laboratory devices. the cradle holds the phone's camera in 11 with the optical components.
 
at the heart of the biosensor is a photonic crystal. a photonic crystal is like a mirror that only reflects one 12 of light while the rest of the 13 passes through. when anything biological attaches to the photonic crystal -- such as protein, cells, pathogens or dna -- the reflected color will shift from a shorter wavelength to a longer wavelength.
 
for the handheld iphone biosensor, a normal microscope slide is coated with the photonic material. the slide is primed to react to a specific target 3. the photonic crystal slide is inserted into a slot on the cradle and the spectrum measured. its reflecting wavelength shows up as a black gap in the spectrum. after exposure to the test sample, the spectrum is re-measured. the degree of shift in the reflected wavelength tells the app how much of the target molecule is in the sample.
 
the entire test takes only a few minutes; the app walks the user through the process step by step. although the cradle holds only about $200 of optical components, it performs as 14 as a large $50,000 spectrophotometer in the laboratory. so now, the device is not only portable, but also 15 for fieldwork in developing nations.


点击收听单词发音收听单词发音  

1 18c3f40d432ba8dc33bad8fb82873ea8     
n.毒素( toxin的名词复数 )
参考例句:
  • the seas have been used as a receptacle for a range of industrial toxins. 海洋成了各种有毒工业废料的大容器。
  • most toxins are naturally excreted from the body. 大部分毒素被自然排出体外。 来自《简明英汉词典》
2 187c25e49d45ad10b2f266c1fa7a8d49     
分子( molecule的名词复数 )
参考例句:
  • the structure of molecules can be seen under an electron microscope. 分子的结构可在电子显微镜下观察到。
  • inside the reactor the large molecules are cracked into smaller molecules. 在反应堆里,大分子裂变为小分子。
3 y6tzn     
n.分子,克分子
参考例句:
  • a molecule of water is made up of two atoms of hygrogen and one atom of oxygen.一个水分子是由p妈?f婘??妈?成的。
  • this gives us the structural formula of the molecule.这种方式给出了分子的结构式。
4 f7b11037f2050959293aafb493b7653c     
n.能力( capability的名词复数 );可能;容量;[复数]潜在能力
参考例句:
  • he was somewhat pompous and had a high opinion of his own capabilities. 他有点自大,自视甚高。 来自辞典例句
  • some programmers use tabs to break complex product capabilities into smaller chunks. 一些程序员认为,标签可以将复杂的功能分为每个窗格一组简单的功能。 来自about face 3交互设计精髓
5 aapxh     
adj.立即的;直接的,最接近的;紧靠的
参考例句:
  • his immediate neighbours felt it their duty to call.他的近邻认为他们有责任去拜访。
  • we declared ourselves for the immediate convocation of the meeting.我们主张立即召开这个会议。
6 tvbzxs     
n.计算
参考例句:
  • to work in computing 从事信息处理
  • back in the dark ages of computing, in about 1980, they started a software company. 早在计算机尚未普及的时代(约1980年),他们就创办了软件公司。
7 jsgzz     
n.能力;才能;(pl)可发展的能力或特性等
参考例句:
  • she has the capability to become a very fine actress.她有潜力成为杰出演员。
  • organizing a whole department is beyond his capability.组织整个部门是他能力以外的事。
8 me9xh     
adj.分子的;克分子的
参考例句:
  • the research will provide direct insight into molecular mechanisms.这项研究将使人能够直接地了解分子的机理。
  • for the pressure to become zero, molecular bombardment must cease.当压强趋近于零时,分子的碰撞就停止了。
9 4u3z1l     
(缩)deoxyribonucleic acid 脱氧核糖核酸
参考例句:
  • dna is stored in the nucleus of a cell.脱氧核糖核酸储存于细胞的细胞核里。
  • gene mutations are alterations in the dna code.基因突变是指dna密码的改变。
10 4725dcf446a342f1473a8228e42dfa48     
(机器、设备等的)构成要素,零件,成分; 成分( component的名词复数 ); [物理化学]组分; [数学]分量; (混合物的)组成部分
参考例句:
  • the components of a machine 机器部件
  • our chemistry teacher often reduces a compound to its components in lab. 在实验室中化学老师常把化合物分解为各种成分。
11 lk8yz     
n.队列;结盟,联合
参考例句:
  • the church should have no political alignment.教会不应与政治结盟。
  • britain formed a close alignment with egypt in the last century.英国在上个世纪与埃及结成了紧密的联盟。
12 8ghwn     
n.波长
参考例句:
  • the authorities were unable to jam this wavelength.当局无法干扰这一波长。
  • radio one has broadcast on this wavelength for years.广播1台已经用这个波长广播多年了。
13 trhy6     
n.谱,光谱,频谱;范围,幅度,系列
参考例句:
  • this is a kind of atomic spectrum.这是一种原子光谱。
  • we have known much of the constitution of the solar spectrum.关于太阳光谱的构成,我们已了解不少。
14 ojhyf     
adv.准确地,精确地
参考例句:
  • it is hard to hit the ball accurately.准确地击中球很难。
  • now scientists can forecast the weather accurately.现在科学家们能准确地预报天气。
15 kz6zfq     
adj.支付得起的,不太昂贵的
参考例句:
  • the rent for the four-roomed house is affordable.四居室房屋的房租付得起。
  • there are few affordable apartments in big cities.在大城市中没有几所公寓是便宜的。
上一篇:白虎体色发白原因被发现 下一篇:
tag标签: computer tests
发表评论
请自觉遵守互联网相关的政策法规,严禁发布色情、暴力、反动的言论。
评价:
表情:
验证码:点击我更换图片
最新评论
网站地图