| 单词 |
pterin |
| 释义 |
pterin Chem.|ˈtɛrɪn|
Also -ine.
[a. G. pterin (Wieland & Schöpf 1925, in Ber. d. Deut. Chem. Ges. LVIII. 2178), f. Gr. πτερ-όν wing, feather: see -in1.]
Any of a class of naturally occurring pteridine derivatives found esp. as insect pigments; more generally, any pteridine.
1934Chem. Abstr. XXVIII. 1353 (heading) Occurrence of pterins in wasps and butterflies. 1943A. H. Cook tr. Mayer's Chem. Natural Coloring Matters v. 264 The pterins occur as small colored or colorless granules in association with chitin. 1950Thorpe's Dict. Appl. Chem. (ed. 4) X. 264/1 The name ‘pterin’ denotes a group of heterocyclic compounds, of both natural and synthetic origin, the molecules of which contain..a pyrazine ring fused to a pyrimidine ring. 1954Sci. News XXXIV. 91 The purines and pterines constitute a major source of colour to the wings of butterflies;..the latter as white, red, yellow, and orange pigments, which are also found in the integument of wasps. 1970A. L. Lehninger Biochem. xxiv. 543 Folic acid..contains three characteristic building blocks (1) a substituted pterin, (2) p-aminobenzoic acid, and (3) glutamic acid. |
英语词典包含277258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。
相关内容：
相关热词搜索：pterin英英词典英英释义英语词汇意思用法释义英语
单词 pterideous 释义 pterideous, a. Bot.|pt-, trdis|[f. mod.L. Pteride (f. pteris) + -ous.......