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单词 ureas
释义

urea /ū-rēˈə or ūˈrē-ə/

noun

Carbamide, CO(NH2)2, a substance found in mammalian urine, the chief form in which nitrogenous waste is excreted and the first natural product to be synthesized

ORIGIN: Gr ouron urine

urēˈal (or /ūˈri-əl/) or ūrēˈic adjective

ureide /ūˈrē-īd/ noun (chem)

  1. Any of several organic compounds derived from urea
  2. An acyl derivative of urea, such as urethan

ūˈridine noun

A pyrimidine nucleoside found in RNA and formed from uracil and ribose

urea-formalˈdehyde resin noun

A resin produced by condensation of urea with formaldehyde

urea resins plural noun

Thermosetting resins used eg in adhesive, made by heating urea and aldehyde, usu formaldehyde

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更新时间:2024/11/10 15:18:32