allophanicadj.¹

Brit.

/aləˈfanɪk/, U.S.

/ˌæləˈfænɪk/

Origin: A borrowing from Greek, combined with an English element; originally modelled on a German lexical item. Etymons: Greek ἀλλοϕανής , -ic suffix.

Etymology: < Byzantine Greek ἀλλοϕανής appearing otherwise ( < ancient Greek ἀλλο- allo- comb. form + -ϕανής -phane comb. form) + -ic suffix, originally (in allophanic acid ) after German Allophansäure (J. Liebig & F. Wöhler 1846, in Ann. der Chemie 59 292, the paper summarized in the source cited in quot. 1847 for allophanic acid n. at sense 1). Compare French allophanique (in acide allophanique: 1846 in various abstracts of the German paper).

Chemistry.

1. allophanic acid n. an unstable organic acid, urea-1-carboxylic acid, known chiefly in the form of derivatives such as esters and amides.Formula: NH₂CONHCOOH.

ΘΚΠ

the world > matter > chemistry > organic chemistry > organic salts > [adjective] > other

gummate1823

oxalatic1846

allophanic acid1847

succinic1857

uratic1876

cyanogenetic1902

cyanogenic1961

1847 Chem. Gaz. 1 Mar. 89 Whether we assume this body to contain cyanic or cyanuric acid, it does not possess a composition analogous to that of the other æther compounds, since it is decomposed by barytic water, forming a baryta salt which neither behaves like the cyanate nor the cyanurate of baryta, but belongs to a new acid, allophanic acid.

1922 J. J. Sudborough Bernthsen's Text-bk. Org. Chem. (new ed.) xiii. 300 Allophanic acid itself is not known in the free state, as it immediately breaks up into urea and carbon dioxide.

1971 Jrnl. Org. Chem. 36 3582 The elusive allophanic acid thus was directly observed for the first time in its stable diprotonated form.

2008 G. F. Combs Vitamins (ed. 3) ii. 24/2 In 1936, Evans isolated from unsaponifiable wheat germ lipids allophanic acid esters of three alcohols, one of which had very high biological vitamin E activity.

2. Of or derived from this acid.

ΚΠ

1849 R. Kane Elements Chem. (ed. 2) 788 Allophanic ether..is formed when the vapours of hydrated cyanic acid are passed into ether, as long as they are absorbed.

1872 H. Watts Dict. Chem. Suppl. 350 Biuret is also produced by the action of ammonia on allophanic ether; in fact, it has the composition of allophanic amide.

1909 Brit. Med. Jrnl. 22 May 1234/1 Only recently has a santalol preparation in solid form been put upon the market under the name of ‘allosan’, which is the allophanic ester of santalol.

1992 Jrnl. Colloid & Interface Sci. 150 473 The kinetics of esterolysis of three allophanic esters and p-nitrophenylacetate were studied in benzene and 1,2-dichloroethane as a function of surfactant concentration.

This entry has been updated (OED Third Edition, September 2012; most recently modified version published online December 2021).

allophanicadj.²

Brit.

/aləˈfanɪk/, U.S.

/ˌæləˈfænɪk/

Origin: Formed within English, by derivation. Etymons: allophane n., -ic suffix.

Etymology: < allophane n. + -ic suffix.

Soil Science.

Of the nature of or containing the clay mineral allophane; esp. designating soils dominated by allophane and related minerals, typically occurring on substrates of volcanic ash and weathered volcanic rocks.

ΚΠ

1911 Trans. Eng. Ceramic Soc. 10 117 Classification of the Aluminosilicates... I.—Alumino-monosilicates—Allophanic type... This is represented by allophane—Al₂O₃.SiO₂ n H₂O.

1940 Proc. Linn. Soc. New S. Wales p. ix. (caption) Siallitic (allophanic) accumulation.

1963 Clay Minerals Bull. 5 237 A Quaternary or Recent tuff or pumice has weathered to an allophanic soil.

2008 W. Chesworth Encycl. Soil Sci. 41/2 Soils on slopes of volcanoes often show a trend from less weathered vitric or andic soils at high elevations..to allophanic soils..and finally to more weathered soils.

This is a new entry (OED Third Edition, September 2012; most recently modified version published online December 2021).

单词	allophanic
释义	allophanicadj.¹ Brit. /aləˈfanɪk/, U.S. /ˌæləˈfænɪk/ Origin: A borrowing from Greek, combined with an English element; originally modelled on a German lexical item. Etymons: Greek ἀλλοϕανής , -ic suffix. Etymology: < Byzantine Greek ἀλλοϕανής appearing otherwise ( < ancient Greek ἀλλο- allo- comb. form + -ϕανής -phane comb. form) + -ic suffix, originally (in allophanic acid ) after German Allophansäure (J. Liebig & F. Wöhler 1846, in Ann. der Chemie 59 292, the paper summarized in the source cited in quot. 1847 for allophanic acid n. at sense 1). Compare French allophanique (in acide allophanique: 1846 in various abstracts of the German paper). Chemistry. 1. allophanic acid n. an unstable organic acid, urea-1-carboxylic acid, known chiefly in the form of derivatives such as esters and amides.Formula: NH₂CONHCOOH. ΘΚΠ the world > matter > chemistry > organic chemistry > organic salts > [adjective] > other gummate1823 oxalatic1846 allophanic acid1847 succinic1857 uratic1876 cyanogenetic1902 cyanogenic1961 1847 Chem. Gaz. 1 Mar. 89 Whether we assume this body to contain cyanic or cyanuric acid, it does not possess a composition analogous to that of the other æther compounds, since it is decomposed by barytic water, forming a baryta salt which neither behaves like the cyanate nor the cyanurate of baryta, but belongs to a new acid, allophanic acid. 1922 J. J. Sudborough Bernthsen's Text-bk. Org. Chem. (new ed.) xiii. 300 Allophanic acid itself is not known in the free state, as it immediately breaks up into urea and carbon dioxide. 1971 Jrnl. Org. Chem. 36 3582 The elusive allophanic acid thus was directly observed for the first time in its stable diprotonated form. 2008 G. F. Combs Vitamins (ed. 3) ii. 24/2 In 1936, Evans isolated from unsaponifiable wheat germ lipids allophanic acid esters of three alcohols, one of which had very high biological vitamin E activity. 2. Of or derived from this acid. ΚΠ 1849 R. Kane Elements Chem. (ed. 2) 788 Allophanic ether..is formed when the vapours of hydrated cyanic acid are passed into ether, as long as they are absorbed. 1872 H. Watts Dict. Chem. Suppl. 350 Biuret is also produced by the action of ammonia on allophanic ether; in fact, it has the composition of allophanic amide. 1909 Brit. Med. Jrnl. 22 May 1234/1 Only recently has a santalol preparation in solid form been put upon the market under the name of ‘allosan’, which is the allophanic ester of santalol. 1992 Jrnl. Colloid & Interface Sci. 150 473 The kinetics of esterolysis of three allophanic esters and p-nitrophenylacetate were studied in benzene and 1,2-dichloroethane as a function of surfactant concentration. This entry has been updated (OED Third Edition, September 2012; most recently modified version published online December 2021). allophanicadj.² Brit. /aləˈfanɪk/, U.S. /ˌæləˈfænɪk/ Origin: Formed within English, by derivation. Etymons: allophane n., -ic suffix. Etymology: < allophane n. + -ic suffix. Soil Science. Of the nature of or containing the clay mineral allophane; esp. designating soils dominated by allophane and related minerals, typically occurring on substrates of volcanic ash and weathered volcanic rocks. ΚΠ 1911 Trans. Eng. Ceramic Soc. 10 117 Classification of the Aluminosilicates... I.—Alumino-monosilicates—Allophanic type... This is represented by allophane—Al₂O₃.SiO₂ n H₂O. 1940 Proc. Linn. Soc. New S. Wales p. ix. (caption) Siallitic (allophanic) accumulation. 1963 Clay Minerals Bull. 5 237 A Quaternary or Recent tuff or pumice has weathered to an allophanic soil. 2008 W. Chesworth Encycl. Soil Sci. 41/2 Soils on slopes of volcanoes often show a trend from less weathered vitric or andic soils at high elevations..to allophanic soils..and finally to more weathered soils. This is a new entry (OED Third Edition, September 2012; most recently modified version published online December 2021). < adj.¹1847adj.²1911
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allophanicadj.1

allophanicadj.2

allophanicadj.¹

allophanicadj.²