Liesegang rings

Liesegang rings
Lie·se·gang rings 'lē-zə-.gäŋ- n pl a series of usu. concentric bands of a precipitate that are separated by clear spaces and that are often formed in gels by periodic or rhythmic precipitation called also Liesegang phenomenon
Liesegang Raphael Eduard (1869-1947)
German chemist. Liesegang was an outstanding colloid chemist. Investigating the chemical reactions occurring in gels, he discovered the periodic precipitation reactions in gels that are now known as Liesegang rings.

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1. see under phenomenon. 2. concentric laminations due to deposition of calcium, such as occur within some tumors or other lesions.

Medical dictionary. 2011.

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  • Liesegang rings — are a phenomenon seen in many, if not most, chemical systems undergoing a precipitation reaction, under certain conditions of concentration and in the absence of convection. HistoryThe phenomenon was first noted over one hundred years ago (in… …   Wikipedia

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  • Liesegang — Ralph E., German chemist, 1869–1947. See L. rings, under ring …   Medical dictionary

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