微生物检测新方法将问世
文章来源:未知 文章作者:meng 发布时间:2010-03-21 01:22 字体: [ ]  进入论坛
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We are surrounded by microorganisms. They inhabit our skin, the air we breathe, the surfaces we touch. In most cases this is not a problem, but there are situations in which these constant companions can be dangerous or even life-threatening. They are unwelcome, for example, on medical instruments, in culture fluids(培养液) or on laboratory-grown tissue transplants such as cartilage(软骨) . Constant sterility1(无菌,不育) checks are therefore required during the production of artificial cartilage. Conventional(传统的,惯例的) testing methods for detecting germs are, however, time-consuming. Specimens2 have to be taken and then cultivated and reproduced in culture fluid because bacteria and fungi3(真菌,菌类) can only be detected in large quantities. Research scientists at the Fraunhofer Institute for Physical Measurement Techniques (IPM) in Freiburg, working in collaboration4 with(与……合作) the Fraunhofer Institute for Interfacial Engineering and Biotechnology (IGB) and the Fraunhofer Institute for Biomedical Engineering (IBMT), have succeeded in drastically(激烈地,彻底地) shortening this process. Within just a few hours the experts can identify contaminations(污染,玷污) ; one single germ is enough.

»Using conventional methods it takes up to two weeks to test the purity of specimens, for example autologous(自身的) tissue grown in a culture medium. The patient is given an implant5 although the sterility check has not been completed,« explains Carsten Bolwien, project manager at the IPM.

»With our automated6 Raman system we can check specimens immediately before they are implanted. We tested this on artificial knee cartilage. Our device combines a microscope with a Raman spectrometer(分光仪) . The aqueous solution(水溶液) containing the piece of cartilage is first filtered through a micromembrane(微膜) . Only particles exhibiting a suspicious size are trapped in the tiny holes of the micromembrane, and we examine them spectroscopically. In comparison with the known spectra7 the Raman spectra enable the particles to be identified and contaminations by bacteria or fungi can be detected.«

A demonstration8 Raman spectrometer has already been built and can be seen at the Analytica trade show in Munich from March 23 to 26 (Hall A1, Stand 471). Initial blind tests(盲测) checked by health agencies are scheduled to take place this year. The research scientists will examine artificially infected cartilage cultures and detect the contaminations. If everything goes well, the testing method will be officially approved.



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1 sterility 5a6fe796564ac45f93637ef1db0f8094     
n.不生育,不结果,贫瘠,消毒,无菌
参考例句:
  • A major barrier to interspecific hybridization is sterility in the F1 progeny.种间杂交的主要障碍是F1代的不育性。
  • Sterility is some permanent factor preventing procreation.不育是阻碍生殖的一种永久性因素。
2 specimens 91fc365099a256001af897127174fcce     
n.样品( specimen的名词复数 );范例;(化验的)抽样;某种类型的人
参考例句:
  • Astronauts have brought back specimens of rock from the moon. 宇航员从月球带回了岩石标本。
  • The traveler brought back some specimens of the rocks from the mountains. 那位旅行者从山上带回了一些岩石标本。 来自《简明英汉词典》
3 fungi 6hRx6     
n.真菌,霉菌
参考例句:
  • Students practice to apply the study of genetics to multicellular plants and fungi.学生们练习把基因学应用到多细胞植物和真菌中。
  • The lawn was covered with fungi.草地上到处都是蘑菇。
4 collaboration bW7yD     
n.合作,协作;勾结
参考例句:
  • The two companies are working in close collaboration each other.这两家公司密切合作。
  • He was shot for collaboration with the enemy.他因通敌而被枪毙了。
5 implant YaBxT     
vt.注入,植入,灌输
参考例句:
  • A good teacher should implant high ideals in children.好教师应该把高尚理想灌输给孩子们。
  • The operation to implant the artificial heart took two hours.人工心脏植入手术花费了两小时。
6 automated fybzf9     
a.自动化的
参考例句:
  • The entire manufacturing process has been automated. 整个生产过程已自动化。
  • Automated Highway System (AHS) is recently regarded as one subsystem of Intelligent Transport System (ITS). 近年来自动公路系统(Automated Highway System,AHS),作为智能运输系统的子系统之一越来越受到重视。
7 spectra RvCwh     
n.光谱
参考例句:
  • The infra-red spectra of quinones present a number of interesting features. 醌类的红外光谱具有一些有趣的性质。
  • This relation between the frequency and the field spectra was noted experimentally. 实验上已经发现频率和场频谱之间的这种关系。
8 demonstration 9waxo     
n.表明,示范,论证,示威
参考例句:
  • His new book is a demonstration of his patriotism.他写的新书是他的爱国精神的证明。
  • He gave a demonstration of the new technique then and there.他当场表演了这种新的操作方法。
TAG标签: medical system cartilage
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