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Description:Francis Chandler, D.V.M., Ph.D., former Chief of the Experimental Pathology Branch at the Centers for Disease Control and Prevention, was shown here using a transmission electron microscope (TEM) to identify changes in ultrastructural morphology within cells.
From the end of an electron gun, a TEM sends a focused beam of electrons through an extremely thin sample of material. Striking the specimen causes electrons in the beam to behave in various ways due to characteristics inherent to the structural nature of the specimen. When the altered beam exits the surface of the sample, it can be focused by an electromagnetic lens to project an image upon a fluorescent surface that can be seen by the human eye.
High Resolution: Click here for hi-resolution image (6.21 MB)
Content Providers(s):CDC
Creation Date:1983
Photo Credit:
CDC Organization
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Copyright Restrictions:None - This image is in the public domain and thus free of any copyright restrictions. As a matter of courtesy we request that the content provider be credited and notified in any public or private usage of this image.