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单词 ruberythric
释义

ruberythricadj.

Brit. /ˌruːbᵻˈrɪθrɪk/, U.S. /ˌrubəˈrɪθˌrɪk/
Origin: A borrowing from Latin, combined with an English element; modelled on a German lexical item. Etymons: Latin rubia , erythric adj.
Etymology: < classical Latin rubia madder (see rubiaceous adj.) + erythric adj. In ruberythric acid n. after German Ruberythrinsäure (F. Rochleder 1851, in Sitzungsberichte der Kaiserlichen Akad. der Wissensch. 6 431).
Chemistry.
ruberythric acid n. a yellow crystalline compound isolated from madder root.Ruberythric acid is a diglucoside of alizarin. Formula: C26H28O14.
ΘΚΠ
the world > matter > chemistry > organic chemistry > acids obtained from plants or trees > [noun] > from roots
verdous acid1836
virginic acid1837
krameric acid1838
angelic acid1843
ruberythric acid1852
rubianic acid1855
cellulic acid1859
1852 Chem. Gaz. 15 Jan. 21 A very pale yellow liquid passes through, which contains the sulphuric, phosphoric, citric, traces of ruberythric and rubichloric acids.
1875 H. E. Roscoe Lessons Elem. Chem. (new ed.) xxxviii. 427 Alizarine, the colouring principle of madder, is contained in the root as a glucoside (called ruberythric acid).
1948 W. W. Pigman Chem. Carbohydrates xi. 470 The presence of these glucosides along with the ruberythric acid in madder is the probable explanation for the well-known color difference between the natural and the synthetic alizarin.
1998 D. S. Seigler Plant Secondary Metabolism vi. 87/1 Ruberythric acid, a diglucoside, can be converted to alizarin by hydrolysis.
This entry has been updated (OED Third Edition, March 2011; most recently modified version published online March 2022).
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adj.1852
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