Racemic
[rә'si:mik]
解释:
(a.) Pertaining to, or designating, an acid found in many kinds of grapes. It is also obtained from tartaric acid, with which it is isomeric, and from sugar, gum, etc., by oxidation. It is a sour white crystalline substance, consisting of a combination of dextrorotatory and levorotatory tartaric acids.
手打:托马斯
例句:
- It was in that same year that Pasteur put on record his discovery of the nature of racemic acid, his first great service to science, from which all his o ther services were to proceed. 李贝. 西洋科学史.
- He had made a capital di scovery of far-reaching importance, namely, that racemic acid is composite, consisting of dextro-tartaric and l?vo-tartaric acids . 李贝. 西洋科学史.
- He succeeded in keeping alive one of the c ommonest moulds on the surface of ashes and racemic acid, and saw the l?vo-tartaric acid appear. 李贝. 西洋科学史.
- Racemic acid, however, which is identical with tartaric acid in i ts chemical constituents, is optically inactive, rotating the plane of polarized light n either to the right nor the left. 李贝. 西洋科学史.
手打:托马斯