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side chain |
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side chain [′sīd ‚chān] (organic chemistry) A grouping of similar atoms (two or more, generally carbons, as in the ethyl radical, C2H5‒) that branches off from a straight-chain or cyclic (for example, benzene) molecule. Also known as branch; branched chain. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Key statement: A rubber composition comprising (A) an organopolysiloxane end-capped with alkenyldialkylsiloxy, radicals and free of aliphatic unsaturation, (B) an organipolysiloxane containing three alkenyl radicals on molecular side chains, (C) an organohydrogenpolysiloxane, (D) fumed silica and (E) an addition reaction catalyst forms a seal member having improved strength and reduced compression set and useful for sealing a polymer electrolyte fuel-cell separator. Sheiko of the University of North Carolina at Chapel Hill and his colleagues synthesized molecules with a carbon backbone and long, densely packed side chains arranged as bristles on a bottle brush are. The high-level resistance to ethidium bromide and the increased susceptibility of the strains to ciprofloxacin in the presence of Phe-Arg-[beta]-naphthylamide were strongly suggestive of an activated drug efflux system, such as AcrAB, the substrates of which also include cephalosporins with lipophilic side chains (2,14). |
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