| 单词 | xanthine |
| 例句 | In 1881-1882 he published papers which established the formulae of uric acid, xanthine, caffeine, theobromine and some other compounds of this group. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 4 "Finland" to "Fleury, Andre" 2011-03-20T02:00:30.697Z Xantheine, or the Coloring Matter soluble in water.—By the preparation of the substance which colors yellow certain dahlias, it is at once perceived that it has no analogy to xanthine. The Art of Perfumery And Methods of Obtaining the Odors of Plants The xanthine bases are closely related to uric acid. The Chemistry of Food and Nutrition The artificial preparation of theobromine and caffeine from xanthine, and guanine also show clearly their relations. Scientific American Supplement, No. 415, December 15, 1883 The yellow deposit which is obtained in this way, is not pure xanthine, as it contains a rather considerable quantity of oil. The Art of Perfumery And Methods of Obtaining the Odors of Plants This precipitate we treat with cold alcohol, which leaves behind the fatty acids, and dissolves the xanthine. The Art of Perfumery And Methods of Obtaining the Odors of Plants One is completely insoluble in water, which we have termed xanthine, a name which Runge has given to a yellow matter from madder. The Art of Perfumery And Methods of Obtaining the Odors of Plants It comprises the xanthine group and the uric acid group of bodies. The Chemistry of Food and Nutrition Both theobromine and caffeine, its methyl derivative, have been made from xanthine, which itself can be formed from guanine, a constituent of guano. Scientific American Supplement, No. 415, December 15, 1883 To obtain the xanthine we treat the petals of yellow flowering dahlias with alcohol, which quickly dissolves the yellow coloring matter, besides the fat and resin. The Art of Perfumery And Methods of Obtaining the Odors of Plants |
| 随便看 |
|
英语例句辞典收录了117811条英语例句在线翻译词条，基本涵盖了全部常用单词及词组的例句翻译及用法，是英语学习的有利工具。