| Birch-Hirschfeld | Felix V., German pathologist, 1842-1899. See: Birch-Hirschfeld stain. (05 Mar 2000) |
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| Birch-Hirschfeld stain | <technique> An obsolete stain for demonstrating amyloid, using Bismarck brown and crystal violet; amyloid is usually stained a bright ruby red, whereas the cytoplasm of cells is not stained and nuclei are brown. (05 Mar 2000) |