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UND 363 Luxol/cresyl
UND 363 luxol blue/cresyl echt
Question | Answer |
---|---|
purpose | demo BOTH myelin and nissl substance |
luxol fast blue principle | stains due to lipoproteins. it is an adic-base reaction that forms salt. the base of lipoprotein replaces the base of the dye. |
cresyl echt violet principle | Nissl susbstance is basophilic and stains sharply with basic aniline dyes. Varying the PH and differentiation, nissl substance and nuclei will stain or only nissl substance will demo. |
fix | formalin |
tech | 10-15 |
qc | spinal cord or medulla |
reagents in procedure | luxol (stain myelin), lithium carbonate (diff'r), 70% alcohol (diff'r), cresyl echt violet (counterstain), alcohol (diff'r) |
results | myelin - blue, nissl/nuclei - violet/rose (purplish) |
issues with this stain are typicall the result of which part | the cresyl echt violet causes typical issues |
if acetic acid isn't added to cresyl echt what will occur | the background will get a diffuse violet stain (entire slide will be purplish) |
if the cresyl echt violet isn't heated what will occur | there will be decreased staining of the nissl substances |
what does the cresy echt violet do for this stain | intensifies the staining of the myelin sheath |