| Liesegang rings | Coloured ring's of precipitated silver chromate formed when a drop of concentrated silver nitrate is added to the surface of a gel (such as gelatin, agar, or silica gel) containing potassium dichromate. (05 Mar 2000) |
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| Liesegang, Ralph | <person> German chemist, 1869-1947. See: Liesegang rings. (05 Mar 2000) |