dichromaten.

Brit.

/dʌɪˈkrəʊmeɪt/, U.S.

/ˌdaɪˈkroʊˌmeɪt/

Origin: Formed within English, by compounding. Etymons: di- comb. form, chromate n.

Etymology: < di- comb. form + chromate n. N.E.D. (1895) gives the pronunciation as (dəikrō^u·mĕt) /daɪˈkrəʊmət/.

Chemistry.

A salt containing the anion Cr₂O₇²⁻; = bichromate n. Cf. chromate n.Salts of this anion are typically oxidizing agents and red or orange in colour.

ΘΚΠ

the world > matter > chemistry > chemical substances > salts > [noun] > salts named by atomic number > chromates > bichromates

dichromate1827

bichromate1854

bichrome1896

1827 Philos. Trans. (Royal Soc.) 117 221 The dichromate of lead is easily formed by digesting chromate of lead in caustic potash.

1871 Jrnl. Chem. Soc. 24 126 Isobutyric acid..is scarcely attacked by a mixture of potassium dichromate and dilute sulphuric acid.

1938 R. Hum Chem. for Engin. Students xxviii. 773 Sodium dichromate is largely used in the chrome-tanning process.

1978 G. C. Hill & J. S. Holman Chem. in Context xxix. 464/1 (caption) A ‘breathalyzer’ contains orange crystals of potassium dichromate( vi), which is reduced to green chromium( iii) by ethanol.

2001 O. Sacks Uncle Tungsten viii. 78 We made a ‘volcano’ together with ammonium dichromate, setting fire to a pyramid of the orange crystals.

Derivatives

diˈchromated adj. treated with a dichromate.

ΚΠ

1831 T. Thomson Syst. Chem. (ed. 7) II. 582 Dichromated peroxide of iron.

1878 W. de W. Abney Treat. Photogr. xxiv. 164 The insolubility of dichromated gelatine.

1973 Materials & Technol. VI. ix. 652 Despite their short keeping life, dichromated colloids are widely used in various photomechanical printing processes.

2011 Appl. Optics 50 5534 Dichromated gelatin (DCG) is one of the best light-sensitive materials for holographic recording.

This entry has been updated (OED Third Edition, March 2014; most recently modified version published online March 2022).

单词	dichromate
释义	dichromaten. Brit. /dʌɪˈkrəʊmeɪt/, U.S. /ˌdaɪˈkroʊˌmeɪt/ Origin: Formed within English, by compounding. Etymons: di- comb. form, chromate n. Etymology: < di- comb. form + chromate n. N.E.D. (1895) gives the pronunciation as (dəikrō^u·mĕt) /daɪˈkrəʊmət/. Chemistry. A salt containing the anion Cr₂O₇²⁻; = bichromate n. Cf. chromate n.Salts of this anion are typically oxidizing agents and red or orange in colour. ΘΚΠ the world > matter > chemistry > chemical substances > salts > [noun] > salts named by atomic number > chromates > bichromates dichromate1827 bichromate1854 bichrome1896 1827 Philos. Trans. (Royal Soc.) 117 221 The dichromate of lead is easily formed by digesting chromate of lead in caustic potash. 1871 Jrnl. Chem. Soc. 24 126 Isobutyric acid..is scarcely attacked by a mixture of potassium dichromate and dilute sulphuric acid. 1938 R. Hum Chem. for Engin. Students xxviii. 773 Sodium dichromate is largely used in the chrome-tanning process. 1978 G. C. Hill & J. S. Holman Chem. in Context xxix. 464/1 (caption) A ‘breathalyzer’ contains orange crystals of potassium dichromate( vi), which is reduced to green chromium( iii) by ethanol. 2001 O. Sacks Uncle Tungsten viii. 78 We made a ‘volcano’ together with ammonium dichromate, setting fire to a pyramid of the orange crystals. Derivatives diˈchromated adj. treated with a dichromate. ΚΠ 1831 T. Thomson Syst. Chem. (ed. 7) II. 582 Dichromated peroxide of iron. 1878 W. de W. Abney Treat. Photogr. xxiv. 164 The insolubility of dichromated gelatine. 1973 Materials & Technol. VI. ix. 652 Despite their short keeping life, dichromated colloids are widely used in various photomechanical printing processes. 2011 Appl. Optics 50 5534 Dichromated gelatin (DCG) is one of the best light-sensitive materials for holographic recording. This entry has been updated (OED Third Edition, March 2014; most recently modified version published online March 2022). < n.1827
随便看	pisaca pisacha pisan pisan assistance pisane pisang pisang fig pisang tree phototoxicities phototoxicity phototracing phototransduction phototransfer phototransformation phototransient phototransistor phototransistors phototrichromatic phototrope phototropes phototroph phototrophic phototrophically phototrophs phototrophy