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Histo Exam 1 - P/F
Properties and Fixatives
| Property | Fixative |
|---|---|
| chromaffin granules | Orth (potassium dichromate) |
| connective tissue | Bouin's |
| electron microscopy | Glutaraldehyde, Modified Millonig, Osmium tetroxide, Paraformaldehyde, Zamboni |
| enzymes | Acetone. Frozen sections – no fixative |
| erythrocytes | Preserved by formalin; NBF, Helly Lysed by acetic acid: Bouin, Carnoy, Zenker |
| fat | osmium tetraoxide, Bouin's |
| Feulgen Reaction for DNA | avoid Bouin's |
| Frozen section | Routine stains - fix in formalin |
| Glycogen | absolute alcohol, Gendre |
| H. pylori | Avoid Glycoxal |
| Immunofluorescence | Frozen section without fixation |
| Immunoreactivity | Zinc Formalin |
| Lymph nodes/nuclear detail | B-5 |
| pheochromocytoma | Ortho |
| PTAH stain for muscle cross-striation | Zenker |
| urate crystals | absolute alcohol |
| other special stains | formalin, most commonly |
| Special studies requiring unfixed tissue | michel's transport media |
| nucleic acids | acetic acid, alcohol, and Carnoy |
| stains for DNA or RNA | Avoid picric acid |
| Dissolves small calcium deposits | Bouin's, Hollande, Zenker, acetic acid, glycoxal |
| Cell culture and tissue culture | RPMI |