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Scanning electron micrograph (SEM) of asbestos fibers. Asbestos is a fibrous mineral form of impure magnesium silicate. It is often used in building materials, chemical filters, and electrical insulation. Inhalation of asbestos fibers may cause asbestosis or lung cancer. Calibration bar in the image is 10 um and was taken at 4,140x.
June 1st, 2013
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