英语词汇“rubian”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	rubian
释义	rubian Chem.\|ˈruːbɪən\| [f. L. rubia + -an: named by E. Schunck (cf. prec.).] The bitter principle of madder-root. 1851Schunck in Phil. Trans. CXLI. 436 The intensely bitter taste of madder and its extracts is due to a peculiar substance, to which I have given the name of Rubian.1868Watts Dict. Chem., Rubian is a hard, dry, brittle, perfectly amorphous mass, resembling dried varnish or gum-arabic. Hence rubiˈanic a.; ˈrubianin(e. (See quots.) 1851Schunck in Phil. Trans. CXLI. 445 The orange-coloured flocks..now consist of four different substances..; the fourth substance I shall denominate Rubianine.1868Watts Dict. Chem., Rubianin, a body obtained..by boiling aqueous rubian..with dilute sulphuric acid.Ibid., Rubianic acid,..an acid, produced..by the oxidation of rubian in contact with alkalis.
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