查询词典 ethyl

Propargyl alcohol was protected by dihydrophran with the catalysis of PPTS ,and then reacted with Ethyl Mag bromide to prepare its corresponding Grignard reagent.

炔丙醇在 PPTS 催化下由二氢吡喃保护，与溴乙烷格氏试剂反应生成相应的格氏试剂，然后与氯甲酸甲酯反应得到羟基丁炔酸甲酯四氢吡喃醚，在 PPTS 催化下脱保护后进行甲磺酰化，由溴化钠进行溴取代后合成了4-溴-2-丁炔酸甲酯，总收率达53%。

An improved procedure for the lithiation of ethyl propiolate is also reported.

改良程序的锂酸乙酯DBN也是报道。

Acetyl propionyl,methyl ethyl diketone

机器翻译参考：乙酰丙，甲基乙基酮

Pteridium aquilinum flavanoe extract has protective effect on ethyl alcohol hepatic toxicity in mice.

蕨菜黄酮提取物对小鼠急性乙醇肝毒性有保护作用。

In order to find new pyrazole leading compounds, 14 1--4-(pyrazol- 5-ylcarbony)semicarbazide devivatives were synthesized from 4-chloro-3-ethyl-1-methyl-5-pyrazole car-bonydrazide and substituted phenylisocyanate.

为了寻求新的吡唑先导化合物，用4-氯-1-甲基-3-乙基-5-吡唑甲酰肼与取代苯基异氰酸酯反应得到了14个新的1-吡唑酰基-4-芳基氨基脲类化合物。

The best result is obtained for the film of 1-ethyl-4-[5--1,3,4-oxadiazol-2-yl] pyridinium tetrafluoroborate.

在这些离子液体中，N-乙基-4-[5--1，3，4-噁唑-2-]吡啶四氟硼酸盐的摩擦学性能最好。

In order to solve the problems of complex cellulose production process and serious pollution, The paper investigated the solubility of cotton stalk cellulose in ionic liquid N-ethyl pyridinium bromide. The structural differences between cotton stalk cellulose and cellulose regenerated from the ionic liquid were investigated using infrared spectroscopy and chemical analysis. Recovery ratio of ionic liquids was also studied.

为解决纤维素生产加工过程复杂且污染严重问题，试验探讨了棉秆纤维素在离子液体溴代N-乙基吡啶中的溶解性能，采用红外光谱等手段对棉秆纤维素在离子液体中溶解和再生前后的结构变化进行了分析，并探讨了离子液体的回收。

At the initial isolation to the extract from ethyl acetate, tow kinds of crystal a and b with higher purity were found, and the primary components were 98.45%. Quinic acid and 69.34% L-Proline, 5-oxo-, methyl ester.

在乙酸乙酯部分进行初次分离时，还得到了两种纯度较高的晶体a和b，经GC-MS分析可知其主要成份分别为98.45%奎宁酸和69.34%的5-脯氨酸甲酯。

80% ethyl alocohol dissolvent and 2.0 ml/min repercolation speed are optimal repercolation conditions, normal pressure aqueous bath condense preparing casting material with the method of thick mastic is fundamentally feasible, the extractive technology of dependable effective component is prepared for advanced development of semen cassiae drop pill.

以80%乙醇为溶剂和2 ml/min渗漉速度为最适宜的重渗漉条件，常压水浴浓缩制备投料用稠膏的方法基本可行，为研制决明子滴丸提供可靠的有效成分提取工艺。

The insecticidal activities of the ethanol extracts and 5 kinds of extracts with petroleum ether, chloroform, ethyl acetate, n-butanol, aqueous from Rubia cordifolia L. against wolfberry aphis was investigated.

采用点滴法，测定了茜草乙醇提取物和石油醚、氯仿、乙酸乙酯、正丁醇和水5种不同极性萃取物对枸杞蚜虫的触杀活性。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。