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用L - 苯丙氨酸,L - 纈氨酸,L - 亮氨酸制得相應(yīng)的N- 羧酸內(nèi)酸酐,并分別與二乙胺,叔丁胺, 異丙胺,正丁胺反應(yīng).L - Phenylalanine, L - valine and L - leucine were used to prepare the corresponding NCAs.目的觀察雙氯芬酸二乙胺鹽凝膠經(jīng)皮用藥的安全性.Objective To observe the safety of diclofenac...
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葡萄糖氧化酶的多醣構(gòu)造中,含有N - 乙醯胺基葡萄糖及甘露糖.The polysaccharide moiety of glucose oxidase contains N - acetylglucosamine and mannose....
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本文介紹了羥乙基纖維素的一般性質(zhì), 應(yīng)用和生產(chǎn)方法.The general properties, application and manufacturing methods of HEC were introduced.研究了高取代度羥乙基纖維素 ( H-HEC ) 的精制工藝.The refining process of high - substitution hydroxyethyl cellulose ( H - HEC ) ...
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“二乙苯”的英語可以翻譯為：[有化] diethylbenzene ...
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“羥乙胺”的拼音為：qiǎng yǐ àn...
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“乙硫醇”的英語可以翻譯為：[化] ethanethiol，ethyl mercaptan，[醫(yī)] aethyl mercaptan，sulfur alcohol ...
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證實1-羥基乙叉 -1,1-二膦酸配體 ( hedp ) 中的季碳為手性碳原子.Moreover , there is a chiral quaternary carbon in the 1 - hydroxyethylidenediphosphonic ( hedp ) ligand....
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以二異丙胺 ( DIPA ) 、硫酸二乙酯 ( Et2SO4 ) 為原料合成N, N二異丙基乙基胺 ( DIPEA ).N, N - Diisopropylethylamine ( DIPEA ) was prepared from diisopropylamine ( DIPA ) and diethyl sulfate ( Et _ 2 SO _ 4 ).論述了高效液相色譜法測定馬來酸二乙酯含量的方法.RP - HPLC absol...
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了解三氯 乙醛 的毒性和致突變作用.Acute toxicity test , mutation test and single - cell gel electrophoresis ( SCGE ) were used.三氯乙醛是無色揮發(fā)性的液體,帶有刺激性很強的氣味,在97.7℃沸騰.Chloral is a colorless, volatile liquid with a very penetrating odor and bo...
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為了凝結(jié)氯乙烷氣體,必須使用大量的冷卻水.Great quantities of cooling water must be available for condensation of the ethylchloride.簡述了二氯乙烷的理化性質(zhì) 、 作業(yè)標(biāo)準(zhǔn)和法規(guī).The article describes the physico - chemical properties, operative standers and laws o...
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乙二醇迅速地被它氧化,生成草酸和羥基醋酸.Glycol is oxidized rapidly by it to oxalic and glycolic acids.結(jié)果表明,聚乙二醇縮水甘油醚對絲膠蛋白具有明顯的交聯(lián)作用.The result showed that polyethylene glycol diglycidyl ether cross linked sericin obviously.摘要 聚乙二醇 是一類親水性長鏈聚...
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報道了在低溫條件下, 以鄰二酮和α-環(huán)烯酮為原料與炔鈉反應(yīng),合成了2,3, 4,5-四甲基-1-乙炔基-2-烯-環(huán)戊醇、1, 2 - 二苯基 -2 - 羥基 -3 - 丁炔 -1 - 酮、3, 4 - 二苯基 -1,5-己二炔-3,4 - 二醇和3,4 - 二苯基 -3 - 環(huán)戊烯 -1 -酮4種化合物.In low temperature, reaction of ketone with sodium acetylide synthe...
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“乙酰胺”的英語可以翻譯為：[化] acetamide，acetylamine，acetic acid amide，ethanamide ...