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单词 methylol
释义

methyloln.

Brit. /ˈmiːθʌɪlɒl/, /ˈmɛθ(ɪ)lɒl/, U.S. /ˈmɛθəlɔl/, /ˈmɛθəlɑl/
Origin: Formed within English, by derivation. Etymons: methyl n., -ol suffix.
Etymology: < methyl n. + -ol suffix.
Chemistry.
The hydroxymethyl group, CH2OH.Originally in chemical names, but not now used in formal chemical nomenclature. Only attributive.
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the world > matter > chemistry > organic chemistry > alcohols > [noun] > alcohol radicals, by number of carbon atoms > other
tetradecatyl1868
methylol1898
1898 Jrnl. Chem. Soc. 74 i. 506 Nitrobutylic alcohol..readily condenses with formaldehyde (1 mol.) to form a glycol (2-methylol-2-nitro-1-butanol).
1937 F. C. Whitmore Org. Chem. 521 Formaldehyde condenses with urea to give methylol ureas, NH2CONHCH2OH etc. The methylol groups can combine with more urea to form more and more complex molecules until a resin is formed.
1962 J. T. Marsh Self-smoothing Fabrics i. 3 The fundamental basis of the process remains unchanged and depends on the application of methylol compounds within the fibre of the fabric followed by their further condensation.
1973 Materials & Technol. VI. viii. 587 A methylol group is here left over which can again react with a further monomethylol phenol molecule to give a polynuclear product.
1996 Crop Sci. 36 1297/1 Our objective was to investigate the response of..Kentucky bluegrass to urea, ureaform, methylene urea, and methylol urea applied as liquid sprays.
This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2022).
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n.1898
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