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quaternary |
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quaternary /qua·ter·nary/ (kwah´ter-nar?e) 1. fourth in order. 2. containing four elements or groups.
quaternary (kwä´turnerē), adj having four elements. Widely used in medicine, quaternary ammonium salts are molecules containing four alkyl or aryl groups attached to a nitrogen atom. quaternary 1. fourth in a series. 2. made up of four elements or groups. quaternary ammonium compounds synthetic cationic detergents commonly used as disinfectants. They act against cell wall lipids in bacteria. An example is benzalkonium chloride. Effective in teat dips for mastitis control. Called also QUATs. quaternary structure the arrangement of separate polypeptide subunits in the structure of a multimeric protein. |
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