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Routine use of backscattered electron imaging to visualize cytochemical and autoradiographic reactions in semi-thin plastic sections

A Nanci, S Zalzal and CE Smith

Department of Anatomy, Universite de Montreal, Quebec, Canada.

The scanning electron microscope (SEM) was used to examine cytochemical and autoradiographic reactions in 2-microns semi-thin sections of tissues conventionally fixed and embedded in various resins. The sections were examined using both the secondary and backscatter modes of the SEM at magnifications within the range attainable with the light microscope. Both modes allowed the imaging of phosphatase reaction product using cerium and lead capture, lectin-gold, and immunogold labeling, with and without silver enhancement, and autoradiography. Backscattered electron imaging (BEI), however, provided images with more contrast and structural details. This approach allows examination of large sections, with more contrast and resolution than the light microscope, and visualization of reactions not visible with this instrument. The improved imaging and the simple and conventional preparation of specimens indicate that BEI can be used routinely to examine tissue organization, cell structure, and the content of the various cell compartments with a resolution approaching that of transmission electron microscopy.

Volume 38, Issue 3, pp. 403-414, 03/01/1990
Copyright © 1990 by The Histochemical Society


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