单词 | pheno- |
释义 | pheno-comb. form 1. Forming nouns and adjectives where the first element has the sense ‘visible, evident’, e.g. phaenozygous adj. 2. Chemistry. Used as a formative element in the names of organic compounds containing one or more phenyl groups or benzene rings in the molecule. ΚΠ 1864 E. Parrish Treat. Pharmacy (ed. 3) iv. viii. 663 Anilina..also known by the names of phenylamina, phenamide, kyanole, crystalline and benzidam. ΚΠ 1852 W. Gregory Handbk. Org. Chem. (ed. 3) 166 Phenamylole. Carbolate of Oxide of Amyle. 1857 W. A. Miller Elements Chem. III. 570 Phenate of amyl, Phenamylole. phenanthraquinone n. Brit. , U.S. , ΚΠ 1876 H. E. Armstrong Introd. Stud. Org. Chem. 135 Phenanthraquinone crystallises in orange-yellow needles, and melts at about 200°. 1968 I. L. Finar Org. Chem. (ed. 4) II. x. 419 An example of the latter [sc. an internal Friedel-Crafts reaction] is the preparation of phenanthraquinone from benzil. 1991 Phytochemistry 30 2094/1 Phenanthraquinone was prepared by chromic acid oxidation of phenanthrene in the usual manner. phenazine n. Brit. , U.S. , ΚΠ 1886 Jrnl. Chem. Soc. 50 1024 Phenazine..can be obtained by heating 2 grams of orthophenylenediamine with the same amount of pyrocatechol for 30 hours at 200–210°. 1968 I. L. Finar Org. Chem. (ed. 4) II. xii. 554 Many dyes are derived from phenazine, e.g., the safranines. 1984 M. J. Taussig Processes in Pathol. & Microbiol. (ed. 2) iv. 588 Colonies are greenish-blue due to characteristic production of pigments, including pyocyanin (a blue-green phenazine pigment) and fluorescin. This entry has been updated (OED Third Edition, December 2005; 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。