molecular sieve

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mo·lec·u·lar sieve

a gellike material with pore sizes of such ranges as to exclude molecules above certain sizes; used in fractionating or purifying macromolecules.
Farlex Partner Medical Dictionary © Farlex 2012

molecular sieve

A material (e.g., oxides: silicate, aluminate, zeolite crystals with pores) which is capable of separating molecules based on size.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

molecular sieve

A type of sieve in which the molecular material present in the gel or crystal will adsorb molecules of a certain kind and let others pass.
See also: sieve
Medical Dictionary, © 2009 Farlex and Partners
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