Construct · 2 fields · 2 citations
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In histology a silver stain is a method that deposits metallic silver on particular tissue structures (nerve fibres, reticular fibres, neurofibrils) so that otherwise invisible elements stand out dark under the microscope. Brown and Vogelaar's 1956 Amino-silver staining of nervous tissue is one of many protocols in which silver ions are reduced selectively onto argyrophilic structures. Here the term names a contrast technique for microscopy whose goal, revealing anatomy, has nothing to do with colouring a window. The referent is a selective silver deposit on tissue.[1]
In protein biochemistry a silver stain is a highly sensitive way to detect proteins and peptides separated in a polyacrylamide gel: silver ions bind the protein bands and are reduced to visible metallic silver, revealing far less material than dye stains can. Switzer, Merril, and Shifrin's 1979 A highly sensitive silver stain established the approach as a standard of the electrophoresis bench. The referent is a band-detection technique measured by its sensitivity, again sharing only the name with the glass colorant and the tissue stain. The common thread across all three is silver reduced to produce contrast, put to three unrelated ends.[2]
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