单词 | roccellic |
释义 | roccellicadj. Chemistry. 1. roccellic acid n. a crystalline carboxylic acid related to succinic acid, and found in certain lichens of genera that include Roccella and Lecanora.Systematic name: (2R,3S)-2-dodecyl-3-methylbutanedioic acid; C17H32O4. ΘΚΠ the world > matter > chemistry > organic chemistry > acids obtained from plants or trees > [noun] > miscellaneous others rheumic acid1816 arabic acida1836 rubiacic acid1835 aspartic acid1836 sylvic acid1836 tannic acid1836 oenanthic acid1837 gummic acid1838 retinic acid1838 roccellic acid1838 rubinic acid1838 lobelic acid1840 polychromatic acid1840 rhabarbaric acid1840 roccelline1840 humic1844 sumbulolic acid1844 isatic acid1845 opianic acid1845 parthenic acid1845 polychromic acid1847 styphnic acid1848 metapectic acid1849 tanningenic acid1852 jalapic acid1853 jalapinolic acid1855 sinapic acid1857 amalic acid1863 phycic acid1864 filicic acid1865 isamic acid1865 tannocaffeic acidc1865 tricarballylic acid1865 guaiaretic acid1866 pectous acid1866 phytomelin1866 porphyric acid1866 thujetic acid1868 turpetholic acid1868 viridic acid1868 rheotannic acid1869 arabinic acid1870 frangulic1872 sclerotic acid1876 theobromic acid1878 gynocardic acid1897 chaulmoogric acid1904 1838 T. Thomson Chem. Org. Bodies 128 Of roccellic acid. This acid was discovered by Dr. Heeren in the Rocella tinctoria. 1884 H. E. Roscoe & C. Schorlemmer Treat. Chem. III. ii. 289 Roccellic acid is insoluble in boiling water, but dissolves very easily in alcohol and ether. 1946 Thorpe's Dict. Appl. Chem. (ed. 4) VII. 287/2 Roccellic Acid..is found in several lichens of different types. 1998 Lichenologist 30 21 It is close to other Fellhanera species,..but it differs in the paler soredia, smaller, 1-septate and constricted ascospores and the presence of roccellic acid. 2. roccellic anhydride n. rare the anhydride of roccellic acid, an oily liquid obtained by heating the acid.Formula: C17H30O3. ΚΠ 1864 H. Watts tr. L. Gmelin Hand-bk. Chem. XVI. 477 (heading) Roccellic anhydride. 1975 Jrnl. Chem. Soc.: Perkin Trans. 1 847/1 Natural roccellic acid was heated under reflux with an excess of acetyl chloride for 3 h. Evaporation and distillation of the residue gave roccellic anhydride. This entry has been updated (OED Third Edition, June 2010; most recently modified version published online March 2022). < |
随便看 |
英语词典包含1132095条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。