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Serial sectioning epoxy embedments by steel knife permits rapid light microscope survey of large tissue volumes, and preselection of areas of interest for electron microscopy. Acetate film (Hollander 1970) and Turtox plastic slides (West 1972) have been suggested as substrates upon which the sections may be “cleared” with an added layer of cured epoxy. In our experience, these substrates are excessively adherent to Epon, and “cleared” sections thinner than 40-50 μm cannot be released from them reliably. The following method is suitable for processing Epon sections 10 or more microns thick.
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Davidowitz et al. (1976) studied this question.
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