SSS 2010-06-02
时间：2019-01-08 作者：英语课 分类：Scientific American(六)月
After hundreds of years, the most common, basic microscopes still operate by means of the same old hardware: the lens. But what if you could do away with that lens and create a microscope that fits on a cell phone? That’s what researchers led by Aydogan Ozcan at U.C.L.A. have developed. Ozcan recently won an NSF (National Science Foundation) Early Career Development award for his work.
Normal microscopes image cells themselves. But Ozcan’s team is imaging their shadows. Tissue cells and bacteria are semi-transparent—light penetrating 1 through cells causes shadings and reveals texture 2. Ozcan uses an LED as his light source, creating cellular 3 shadows. An algorithm turns those shadows into an image of the cells.
Millions of people in the developing world suffer because they’re misdiagnosed, or because simple diseases are missed. With this system, a blood sample can be loaded into a small imaging device attached to a cell phone. The cellular image generated from the sample can be transmitted to a central computer in a nearby hospital. The image can be assessed for disease, with the resulting diagnosis 4 sent back to the field in just minutes. Tests of the device begin in Africa this summer.
Thanks for the minute for Scientific American Sixty-second Science. I am Cynthia Graber.
- He had an extraordinarily penetrating gaze. 他的目光有股异乎寻常的洞察力。
- He examined the man with a penetrating gaze. 他以锐利的目光仔细观察了那个人。
- We could feel the smooth texture of silk.我们能感觉出丝绸的光滑质地。
- Her skin has a fine texture.她的皮肤细腻。
- She has a cellular telephone in her car.她的汽车里有一部无线通讯电话机。
- Many people use cellular materials as sensitive elements in hygrometers.很多人用蜂窝状的材料作为测量温度的传感元件。