Surfactants as resin modifiers and their effect on sectioning
1986
Ease of cutting thin sections with glass knives is markedly improved if the embedding resin contains a surfactant such as lecithin. With lecithin, it is possible to cut 50–100 thin sections from the same place on the knife edge even after facing off the block with 1–2-μm-thick sections. Image quality is similar to that of the unmodified resin if the resin formula is optimized. If not, some chatter or a “mottled” appearance of the tissue image may be present. Lecithin does not significantly affect sectioning with a diamond knife or the appearance of the section in the microscope. The increased ease of sectioning with glass presumably will be translated to diamond knives in the form of an increased useful life of the cutting edge.
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