n.— «The discovery, reported in the latest issue of Science magazine, has proven to be the ideal cleaner for waters infested with heavy metals like cadmium, lead or mercury. Chalcogel is a rigid material that can be used to clean not only waters, but also other environments where the so-called “molecular sieves” are required. A molecular sieve is a material containing tiny pores of a precise and uniform size that is used as an adsorbent for gases and liquids.» —“Chalcogel Could Clean Water of Heavy Metals” eFluxMedia July 28, 2007. (source: Double-Tongued Dictionary)

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