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UND 363 Cresl vacca
UND 363 Cresyl Echt vacca
| Question | Answer |
|---|---|
| purpose of Cresyl Echt Vacca | demo nissl substance (chromatolysis ie injury and subsequent loss) |
| principle Cresyl Echt Vacca | 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. |
| what is the difference in principle from the Vacca method from the Luna method | Vacca uses cresyl violet at an acid PH (due to acetic acid in the working solution) |
| fix | formalin |
| tech | 6-8 |
| qc | spinal cord |
| reagents in order | cresyl echt violet/acetic acid mix (aniline dye) |
| results | nissl/nuclei - blue-purple, background - colorless |
| notes | appear unstained macroscopically (can lead to false conclusions, check with microscope) |
| what 3 types of cresyl can be used interchangeably with this tech | cresyl fast violet, cresyl echt violet, cresyl violet acetate |