pyrocarbonaten.

Brit.

/ˌpʌɪrə(ʊ)ˈkɑːbəneɪt/,

/ˌpʌɪrə(ʊ)ˈkɑːbənət/, U.S.

/ˌpaɪroʊˈkɑrbənət/

Origin: Formed within English, by compounding. Etymons: pyro- comb. form, carbonate n.

Etymology: < pyro- comb. form + carbonate n. In sense 1 after pyrogallic adj., pyrogallol n. In sense 2 after pyrophosphate n., pyrosulphate n., compounds in which there is a characteristic P—O—P and S—O—S linkage, respectively.

†1. Photography. A solution of pyrogallol and sodium carbonate, used as a developer. Obsolete.

ΚΠ

1873 C. L. Lochman tr. German Pharmacopœia 163 Take of Pyro-carbonate of Ammonium [Ger. Brenzlich-kohlensaures Ammon] one part.

1890 Internat. Ann. Anthonys Photogr. Bull. 312 I have developed a good many dozens of exposures, and with pyro-ammonia or pyro-carbonate I have not yet got an unevenly developed film.

2. Chemistry. Any of a class of organic compounds (dicarbonates) of the general formula RO—CO—O—CO—OR′; esp. (in full diethyl pyrocarbonate) a viscous liquid with a fruity odour that is a ribonuclease inhibitor formerly used as an antimicrobial preservative for wine and soft drinks.

ΚΠ

1962 Jrnl. Org. Chem. 27 1901/1 Since 1939 a number of alkyl and mixed alkyl aryl dicarbonates (pyrocarbonates) have been prepared and characterized.

1969 Jrnl. Cell Biol. 43 10a/2 Degradation of RNA prepared by using phenol-sodium dodecyl sulfate (SDS) methods was reduced but not eliminated by the addition of..diethyl pyrocarbonate.

1988 Ž. Procházka tr. J. Farkaš Technol. & Biochem. Wine I. 387 Attempts were made to replace sulphur dioxide by diethyl pyrocarbonate, which decomposes in wine to ethanol and carbon dioxide.

1995 Inorg. Chem. 34 1020/2 Three classes of agent that can be used..are..anhydrides, which release a comparatively weak carbonxylic acid upon reaction; the pyrocarbonates, which release CO₂ and alcohol; and isocyanates.

This entry has been updated (OED Third Edition, December 2007; most recently modified version published online March 2022).

单词	pyrocarbonate
释义	pyrocarbonaten. Brit. /ˌpʌɪrə(ʊ)ˈkɑːbəneɪt/, /ˌpʌɪrə(ʊ)ˈkɑːbənət/, U.S. /ˌpaɪroʊˈkɑrbənət/ Origin: Formed within English, by compounding. Etymons: pyro- comb. form, carbonate n. Etymology: < pyro- comb. form + carbonate n. In sense 1 after pyrogallic adj., pyrogallol n. In sense 2 after pyrophosphate n., pyrosulphate n., compounds in which there is a characteristic P—O—P and S—O—S linkage, respectively. †1. Photography. A solution of pyrogallol and sodium carbonate, used as a developer. Obsolete. ΚΠ 1873 C. L. Lochman tr. German Pharmacopœia 163 Take of Pyro-carbonate of Ammonium [Ger. Brenzlich-kohlensaures Ammon] one part. 1890 Internat. Ann. Anthonys Photogr. Bull. 312 I have developed a good many dozens of exposures, and with pyro-ammonia or pyro-carbonate I have not yet got an unevenly developed film. 2. Chemistry. Any of a class of organic compounds (dicarbonates) of the general formula RO—CO—O—CO—OR′; esp. (in full diethyl pyrocarbonate) a viscous liquid with a fruity odour that is a ribonuclease inhibitor formerly used as an antimicrobial preservative for wine and soft drinks. ΚΠ 1962 Jrnl. Org. Chem. 27 1901/1 Since 1939 a number of alkyl and mixed alkyl aryl dicarbonates (pyrocarbonates) have been prepared and characterized. 1969 Jrnl. Cell Biol. 43 10a/2 Degradation of RNA prepared by using phenol-sodium dodecyl sulfate (SDS) methods was reduced but not eliminated by the addition of..diethyl pyrocarbonate. 1988 Ž. Procházka tr. J. Farkaš Technol. & Biochem. Wine I. 387 Attempts were made to replace sulphur dioxide by diethyl pyrocarbonate, which decomposes in wine to ethanol and carbon dioxide. 1995 Inorg. Chem. 34 1020/2 Three classes of agent that can be used..are..anhydrides, which release a comparatively weak carbonxylic acid upon reaction; the pyrocarbonates, which release CO₂ and alcohol; and isocyanates. This entry has been updated (OED Third Edition, December 2007; most recently modified version published online March 2022). < n.1873
随便看	θ91236 θ912360 θ912361 θ912362 θ912363 θ912364 θ912366 θ912367 θ912368 θ91237 θ912371 θ912373 θ912374 θ912375 θ912376 θ912378 θ912379 θ91238 θ912380 θ912382 θ912384 θ912385 θ912386 θ912387 θ912388