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Plasma spray can be used to produce coatings. of virtually any metallic, cermet, or ceramic ma-. terial. The coatings are used for most of the types. of applications described in a subsequent section. The transferred plasma-arc process adds to. plasma spray the capability of substrate surface heat-. ing and melting. Figure 7 is a schematic repre-. sentation of the process.
1 Coomassie blue-stains proteins a brilliant blue, and is often used in gel electrophoresis. 2  Crystal violet-stains cell walls purple when combined with a mordant. 3  This stain is used in Gram staining. 4  DAPI-a fluorescent nuclear stain that is excited by ultraviolet light, showing blue fluorescence when bound to DNA. Hematoxylin-a nuclear stain that, with a mordant, stains nuclei blue-violet or brown. 2  Hoechst stains-two types of fluorescent stains, 33258 and 33342, these are used to stain DNA in living cells. 3  Iodine-used as a starch indicator. 4  When in solution, starch and iodine turn a dark blue color.