| 单词 |
thymine |
| 释义 |
thymine|ˈθaɪmɪn|
Also thymin.
[f. thymic a.1 + -ine5.]
1. Chem. A colourless crystalline alloxur base, C5H6N2O2, obtained by the action of dilute sulphuric acid on thymic acid (thymic a.1 2).
1894Jrnl. Chem. Soc. LXVI. i. 156 Thymic acid..on heating with sulphuric acid.., thymin..is formed. This substance has neither basic nor acidic properties; it..is deposited from water in quadratic and hexagonal crystals. 1898Schäfer's Text Bk. Physiol. I. 66. 1900 Jrnl. Chem. Soc. LXXVIII. i. 319 Thymin was originally described by Kossel as one of the decomposition products of the nucleic acid of the thymus gland. It has since been obtained from nucleic acid from other sources. 1903Amer. Chem. Jrnl. XXIX. 481 On boiling this mercapto derivative with hydrochloric acid we obtained thymine. 1954New Biol. XVI. 15 In desoxyribose nucleic acid the purine is either adenine or guanine, the pyrimidine either cytosine or thymine. 1976Sci. Amer. Jan. 64/3 The DNA molecule consists of two long chains of nucleotides wound in a double helix... Each nucleotide consists of a deoxyribose sugar, a phosphate group and one of four nitrogenous bases: adenine, guanine, thymine or cytosine.
2. Biochem. = thymopoietin.
1968G. Goldstein in Lancet 20 July 122/1 ‘Thymin’..seems an appropriate name for this substance, which not only is present in normal thymus but also appears to be secreted normally and to have an effect in physiological concentrations on neuromuscular transmission. 1974[see thymopoietin].
Hence thyminic |θaɪˈmɪnɪk|, a. Chem. in thyminic acid, a synonym of thymic acid (thymic a.1 2).
1898J. A. Mandel tr. Hammarsten's Physiol. Chem. 100 From adenylic acid and..other nucleic acids Kossel and Neumann have prepared an acid called by them thyminic 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：thymine英英词典英英释义英语词汇意思用法释义英语
字词 真菌毒性 释义 【医】 fungitoxicity 汉译英翻译词典收录405719条汉英翻译词条，基本涵盖......