| Helly's fixative | A combination of potassium dichromate, mercuric chloride, formaldehyde, and distilled water, used as a microanatomic fixative for cytoplasmic granules and nuclear staining; has the same disadvantages as Zenker's fixative. (05 Mar 2000) |
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| Helly, Konrad | <person> Swiss pathologist, *1875. See: Helly's fixative. (05 Mar 2000) |