查询词典 methyl alcohol

The preparation process of equisetum pratense total alkaloid includes the following steps: coarse pulverizing equisetum pratense to obtain rough powder, methyl alcohol percolation to obtain percolate, recovering methyl alcohol, concentrating, degreasing by means of petroleum ether, alkalifying concentrate, CHCl3 extracting, soda lye washing, neutral water washing, recovering CHCl3 to obtain rough alkaloid, adsorption by using silica gel column, eluting, recovering solvent so as to obtain refined EPR.

该发明是通过两个步骤来实现的：第一步，提取草问荆总碱，流程：草问荆粗粉――渗漉液――浓缩液(析胶、石油醚脱脂、氨水碱化)――碱化浓缩液(CHCl3萃取)――CHCl3层――CHCl3液(回收CHCl3)――粗生物碱――吸附硅胶柱――精致EPR。第二步，选择实验试剂、仪器、用小鼠作为实验对象，进行中枢神经系统实验，研究作用及作用机制。

Formalin A mixture of about 40% formaldehyde, 8% methyl alcohol, and 52% water (the methyl alcohol is present to prevent polymerization of the formaldehyde). It is a powerful reducing agent and is used as a disinfectant, germicide, and fungicide and also as a general preserving solution.

福尔马林：40﹪的甲醛、8﹪的甲醇以及52﹪的水的混合物（加甲醇目的是避免甲醛聚合），它是很强的还原物质，通常用作消毒、杀菌剂、杀真菌剂或作为常规储存液。

The results showed that the optimum conditions were as follows: methyl alcohol as the solvent, the ratio of oil to methyl alcohol 1:2.0, extraction temperature 32℃, extracting 4 times for once 10min.

通过实验得到的最佳工艺条件为：以甲醇为溶剂，油与甲醇比为1：2.0，温度32℃，萃取次数4次，每次萃取时间10min。

However, it is to be noted that activity of sodium hydroxide with respect to the ester exchange reaction is not sufficient, and in order to improve the conversion rate of the waste edible oil to 90%, it is necessary to add methyl alcohol (stoichiometrically required amount of methyl alcohol is about 3 mole with respect to 1 mole of vegetable oil) and catalyst excessively.

不过，这是必须指出的活动氢氧化钠与尊重向酯交换反应是不足够的，并且为了提高转换率的废油脂至90 ％，这是必要的添加甲醇（ stoichiometrically要求金额甲醇约3摩尔与尊重，以1摩尔植物油）和催化剂过分。

Goal compound synthesis namely: Take the vanillic acid as outset raw material, obtains 4- hydroxyl - 3- anisole methyl formate with the methyl alcohol reflux conditions, then after the etherification, the nitration, the return to original state, the ring closure response obtains 6- methoxy - 7- animal pen oxygen radical kui zuo lin - 4- alkone, then passes through the chlorination, the substitution aniline, to escape responses again and so on animal pen oxygen radical, etherification to obtain the goal compound; The goal compound and the diethylamine had the amine substitution reaction to obtain TM1, namely 4- benzene amino - 6- methoxy - 7- [2- hydroxyl - 3-(N, N- two ethyl aminos) third oxygen radical] kui zuo lin; Through zuo has the etherification with the Austria niter to respond obtains TM2, namely 4- benzene amino - 6- methoxy - 7- [2- hydroxyl - 3-(2- methyl - 5- nitryl imidazole) third oxygen radical] kui zuo lin.

目标化合物的合成即：以香草酸为起始原料，与甲醇回流条件下得到4-羟基-3-甲氧基苯甲酸甲酯，然后经过醚化、硝化、还原、环合反应得到6-甲氧基-7-苄氧基喹唑啉-4-酮，然后再经氯化、取代苯胺、脱苄氧基、醚化等反应得到目标化合物；目标化合物与二乙胺发生胺取代反应得到了TM1，即4-苯氨基-6-甲氧基-7-[2-羟基-3-丙氧基]喹唑啉；通过与奥硝唑发生醚化反应得到TM2，即4-苯氨基-6-甲氧基-7-[2-羟基-3-(2-甲基-5-硝基咪唑)丙氧基]喹唑啉。

Some research and analysis on the reaction of 2,4-difluoronitrobenzene and nucleophilic reagent alcohol sodium (methyl alcohol ,ethyl alcohol, propyl alcohol, n-butyl alcohol, t-butyl alcohol, et hl) and the reaction choice of opposite -F in different solvent and conditions have done in this paper.

论文以2，4-二氟硝基苯为主要原料，研究了其与亲核试剂醇钠(甲醇、乙醇、丙醇、正丁醇、叔丁醇等)在不同溶剂中的反应情况，讨论了在几种代表性的溶剂——醇、四氢呋喃、苯、N，N-二甲基甲酰胺中亲核取代反应的情况，研究了温度、反应时间、亲核试剂、溶剂等条件对亲核取代反应的影响。

The production method as defined in claim 7, wherein the alcohol is selected from the group consisting of methyl alcohol, ethyl alcohol, isobutyl alcohol and mixtures thereof.

生产方法所界定的索赔七，其中，酒精是选自小组，甲醇，乙醇，异丁醇及其混合物。

A direct method to prepare nanometre catalyst of positive electrode for methyl alcohol fuel battery is to add strong oxidant to a mixed solution of manganese nitrate and some other metal nitrate, to coat them on the graphite electrode to have catalyst precursor produced, then to prepare the non-platinum nanometre catalyst of metal ion-doped manganese dioxide with carbon as a carrier by thermolytic reaction of the in-situ precursor. The prepared catalyst has the advantages of high electrical catalytic activity of methyl alcohol, high performance to protect against CO poison and low price, and it can lower the battery manufacturing cost effectively as well as can raise the entire electrical property of the battery so that the price performance and the market competitive edge of the battery are enchnaced effectively.

一种直接甲醇燃料电池阳极纳米催化剂的制备方法是在硝酸锰和其它金属硝酸盐的混合溶液中加入强氧化剂，涂抹于石墨电极上制成催化剂先驱体，通过先驱体在原位的热分解反应来制备以碳为载体的金属离子掺杂二氧化锰非铂纳米催化剂；制得的催化剂具有高的甲醇电催化活性、高的抗CO毒化性能以及低廉的价格等优点，可以有效地降低电池的制造成本，提高电池的整体电性能，从而有效地提高直接甲醇燃料电池的性能价格比及市场竞争能力。

At last, the effective approach was found that the 024-antibiotic can be purified by freez-dry, methyl alcohol soaking, acetone, chloroform, and methyl alcohol continuously washing, alumina and silica gel column chromatography.

粗提制品的理化性质研究表明，024放线菌所产抗生素为无色晶体，易溶于水，可溶于甲醇和乙醇，且在甲醇中的溶解度较大，不溶或难溶于丙酮、氯仿、正丁醇、乙酸乙酯与苯。

The methyl alcohol crude extract and phalloidin had theobvious inhibitory action on on H_(22) mice, the inhibition rate of the methyl alcohol crude extract andphalloidin were 43.48% and 65.15%.

甲醇粗提物和单体化合物二羟鬼笔毒肽对H_(22)荷瘤鼠有抗肿瘤活性，抑瘤率分别为43.48％和65.15％。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。