methonium compound

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• compound — 1. In chemistry, a substance formed by the covalent or electrostatic union of two or more elements, generally differing entirely in physical characteristics from any of its components. 2. In pharmacy, denoting a preparation containing several… …   Medical dictionary

• quaternary ammonium compound — noun a compound derived from ammonium with hydrogen atoms replaced by organic groups; used as surface active agents, disinfectants, and in drugs • Hypernyms: ↑organic compound * * * noun also quaternary ( es) : any of a large class of strong… …   Useful english dictionary

• Neuromuscular-blocking drug — Global view of a neuromuscular junction: 1. Axon 2. Motor end plate 3. Muscle fiber 4. Myofibril …   Wikipedia

• Quaternary ammonium muscle relaxants — are quaternary ammonium salts used as drugs for muscle relaxation, most commonly in anasthesia. It is necessary to prevent spontaneous movement of muscle during surgical operations. Muscle relaxants inhibit neuron transmission to muscle by… …   Wikipedia

• carbonium ion — /kahr boh nee euhm/ an organic ion containing a positively charged carbon atom (opposed to carbanion). [CARBON + IUM] * * * ▪ chemical ion Introduction       any member of a class of organic molecules with positive charges localized at a carbon… …   Universalium

• hexamethonium — ˌheksəməˈthōnēəm noun ( s) Etymology: New Latin, from hexa + methonium : the bivalent substituted ammonium ion [(CH3)3N(CH2)6N(CH3)3]++ derived by methylation of hexamethylenediamine; …   Useful english dictionary