查询词典 methanol

Secondly,a mixture of acetone and methyl formate was added into the methanol solution of sodium methoxide to prepare sodium formyl acetone by Claisen reaction.

以金属钠为原料，甲醇为溶剂，先制成甲醇钠的饱和甲醇溶液，再滴加丙酮和甲酸甲酯进行Claisen酯缩合制得丁酮烯醇钠，最后在强酸作用下与甲醇进行缩醛化反应合成了4，4-二甲氧基-2-丁酮，过程总收率达到73.1%，纯度98.7%。

Then, N-for-aspartame was obtained from the reaction of 3-formyl-4-carboxymethyl-1,3-oxazolidine-5-one and L-phenylalanine methylester hydrochloric acid under sodium acetate anhydrous in ethyl acetate, and the target product was prepared after removing formyl in the mixture system of hydrochloric acid, methanol and water, the yield of aspartame reaches 89.2%.

最后，用3-甲酰-4-羰基口恶唑烷-5-酮乙酸与L-苯丙氨酸甲酯盐酸盐在溶剂中进行接肽反应，然后在甲醇/盐酸混合体系中进行脱甲酰保护基，从而得到最终目标产物，产率为89.2%。

The antifungal activities of methanol extract and ethanol extract from Inula,helenium and different extract component from ethanol extract against Sphaerotheca fuliginea,Pseudoperonospora cubensis,Colletotrichum orbiculare,Botrytis cinerea,Fulvia fulva were tested.

以黄瓜白粉菌、黄瓜霜霉菌、黄瓜炭疽菌、番茄灰霉菌、番茄叶霉菌为供试菌，测试了土木香甲醇、乙醇提取物以及乙醇提取物不同萃取组分的抑菌活性。

The dimethyl fumarate is synthesized by one-step from maleic anhydrid and methanol in the presence of mixed catalyst.

马来酸酐与甲醇在混合催化剂的作用下，一步合成了富马酸二甲酯。

The method was suitable to determine methanol and fusel oils in distilled spirit simultan...

该方法适用于白酒中甲醇和杂醇油的同时分析测定。

A new method for the determination of methanol, ethyl acetate and fusel oils in the Chinese spirits by capillary gas chromatography was studied.

建立了一种用毛细管气相色谱法测定白酒中甲醇、乙酸乙酯和杂醇油的方法，并对色谱条件进行了优化。

A new method for the determination of methanol, Ethyl Acetate and fusel oils in sticky rice alcohol by capillary gas chromatography was studied.

建立了一种用毛细管气相色谱法测定糯米酒中甲醇、乙酸乙酯和杂醇油的方法，并对色谱条件进行了优化。

Space time yield of methanol and conversion of gas increase with pressure.

随着压力的升高，反应的时空产率和气体的转化率都在增加。

The expression of spinach glycolate oxidase in pichia pastoris appeared to be induced by methanol, the molecular weight of glycolate oxidase was about 39.8kDa by SDS-PAGE and consisted with the data of literature.

甲醇诱导重组菌表达，并对诱导的条件进行优化，确定甲醇最适剂量为0.5%，最佳表达时间为72hr，最适温度为28℃，最佳pH为5.5，最佳表达菌体密度A600为0.8。

Reservation ability of gossypol in methanol phase at different conditions was investigated.

用水稀释法提取甲醇相中的棉酚，并对提取工艺进行了优化研究。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。