单词 | gentianine |
释义 | gentianinen. Biochemistry. 1. Any of several compounds isolated from gentian root; esp. gentisin. Now rare. ΚΠ 1823 C. T. Haden tr. F. Magendie Formulary New Remedies 87 Gentianin [Fr. gentianin] does not sensibly change the colour of turnsol either when blue or when reddened by acids. 1843 Chem. Gaz. 15 Nov. 446 Gentianine crystallizes in slender, pale yellow, acicular needles. 1874 C. D. F. Phillips Materia Medica & Therapeutics Veg. Kingdom 311 The active principle of gentian is not, as was formerly supposed, the gentianine or gentianic acid, C14H10O5. 1904 S. E. Jelliffe Introd. Pharmacognosy 117 The coloring-matter is gentisin (gentianin or gentisic acid) in yellow tasteless crystals. 2007 Nat. Sources Flavourings: Rep. No. 2 (Council of Europe) 85 Mainly gentisin [1,7-dihydroxy-3-methoxy-xanthone; also known as gentianin]. 2. In form gentianin. A plant pigment of the anthocyanin class, originally isolated from the blue flowers of a species of gentian ( Gentiana acaulis).Formula: C30H27O14. [After German Gentianin (P. Karrer & R. Widmer 1927, in Helvetica Chimica Acta 10 73).] ΘΚΠ the world > matter > colour > named colours > blue or blueness > blue colouring matter > [noun] > blue pigment > specific azurec1374 lapis lazulia1425 litmusc1503 verditer1505 florey1527 bice1548 smalt1558 smalts1591 smalt1598 ultramarine1598 litmus blue1612 verditer1665 ultramarine blue (or colour)1686 blue sublimate1700 Prussian blue1724 terre bleue1728 starch blue1742 king's blue1778 verditel1778 Antwerp brown1787 Berlin blue1794 lacmus1794 Antwerp blue1795 French blue1802 lapis1811 Waterloo blue1815 Waterloo1823 cobalt1835 Thénard's blue1837 iron blue1839 turnsole1839 permanent blue1863 opal blue1880 Haarlem blue1885 cyanine blue1886 cerulean blue1889 Victoria blue1890 Milori blue1899 Prussian1911 Windsor blue1912 gentianine1927 Monastral1936 Alcian Blue1947 1927 Brit. Chem. Abstr. A. 253/1 About 0.1% of a pure anthocyanin (gentianin) may be extracted from the dried flowers of the blue gentian, Gentiana acaulis. 1963 T. A. Geissman in M. Florkin & E. H. Stotz Comprehensive Biochem. IX. x. 238 Gentianin is a p-hydroxycinnamoyl derivative of a delphinidin glucoside. 2000 W. Steglich et al. RÖMPP Encycl. Nat. Products 256/1 Gentianin (p-coumaric acid ester of delphinidin 3-O-glucoside). 3. Usually in form gentianine. A monoterpenoid alkaloid present in gentians and certain other plants, experimentally demonstrated to have hypotensive, muscle relaxant, and anti-inflammatory properties.Formula: C10H9NO2. ΚΠ 1946 Chem. Abstr. 40 7213 Extn. [= extraction] of ground Gentiana kirilowi..gave 0.1% gentianine. 1949 T. A. Henry Plant Alkaloids (ed. 4) 742 This plant [sc. Gentiana kirilowii] contains the alkaloid gentianine, C10H9O2N. 1963 R. Hegnauer in T. Swain Chem. Plant Taxon. xiv. 399 The majority of the Gentianaceae contain only gentianine. 1992 W. Tang & G. Eisenbrand Chinese Drugs of Plant Origin lxxii. 553 Antiinflammatory activity of gentianine was also demonstrated. 2006 Canad. Jrnl. Physiol. & Pharmacol. 84 652/2 Alkaloids like choline and gentianine, flavonoids, and quercitin are some of the other components of Trigonella seeds, which have antidiabetic and hypoglycemic effects. This entry has been updated (OED Third Edition, March 2021; most recently modified version published online March 2022). < n.1823 |
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