查询词典 methanol

The results suggest,(1) With the increase of methanol density,the foaming height and the antifoaming time all drop.(2) With the increase of methanol density and treatment time,the desulphurization efficiency of MDEA solutions drops when the solutions were refluxed at hermetic constant temperature(115～120℃)...

研究结果表明，随甲醇浓度的增大，MDEA溶液的起泡高度下降、消泡时间减少；在115~120℃下密闭恒温处理时，随甲醇浓度的增大及处理时间的延长，MDEA溶液的脱硫效率下降，含1%甲醇的MDEA溶液密闭恒温24h时MDEA脱硫效率下降达0.35%。

Root activity of eggplant seedling decreased with the concentration of the methanol isolatable components increasing. Autotoxic substances in the methanol isolatable fraction suppressed the absorption of NO〓, PO〓, K〓, Mg〓 and Ca〓, implying the inhibition effect of the substances on ion uptake was one of the important mechanisms in allelopathy.

茄子幼苗的根系活力随水提物中醇溶性组分浓度的增加而降低，同时植株对NO〓、PO〓、K〓、Mg〓、Ca〓等离子的吸收受阻，因此抑制离子吸收是水提物中自毒物质的重要效应之一。

In this thesis betulin was purified by recrystallization with chloroform and methanol mixture, and orthogonal design had been taken to optimize the conditions of recrystallization including the volume and ratio of chloroform and methanol mixtures.

在白桦酯醇的纯化方面目前比较成熟的方法是氯仿+甲醇混合溶剂重结晶来纯化白桦酯醇，本文通过正交设计，得到最优化的溶剂比例和用量。

Methyl-2,3,5,6-tetrafluoro-benzene methanol was synthesized by chlorination, acylation, fluorination, esterifica- tion, reduction, bromization, reduction from terephthalic acid. Tefluthrin was obtained from-(1RS,3RS)-3-(2-chloro-3,3,3-trifluoro-1-propenyl)-2,2-dimethyl cycolpropa-necarboxylate acid by reacting with 4-methyl-2,3,5,6-tetrafluoro-benzene methanol.

以对苯二甲酸为原料，经氯化、酰氯化、氟化、酯化、还原、溴化、还原七步反应合成了4-甲基-2，3，5，6-四氟苄醇，甲基苄醇与-(1RS，3RS)-3-(2-氯-3，3，3-三氟丙-1-丙烯基)-2，2-二甲基环丙甲酸一步酯化合成了七氟菊酯。

Given the current complexity of industrial recovery of 3'-methyl-2'-butenyl 3, 3-dimethyl-pentenoate and the decomposition problems with 2-methyl-1-butene, research was conducted on a process for direct recycling of MBDP involving an ester exchange reaction of MBDP with either methanol, trimethyl orthoacetate, or solutions of methanol and trimethyl orthoacetate.

针对目前工业上回收3，3-二甲基－4-戊烯酸－3'-甲基－2'-丁烯酯工艺复杂、异戊烯大量分解问题，研究了MBDP直接返回循环使用工艺，MBDP与甲醇、原乙酸三甲酯或与甲醇原乙酸三甲酯混合溶液进行酯交换反应的回收新工艺，比较了四异丙基钛酸酯、甲醇钠、氢氧化钾用作酯交换催化剂的效果，筛选出回收MBDP&一锅煮&最佳工艺：按照n：n：n：n＝1.0：9.8：9.2：0.05物质的量比投料，74℃~78℃反应21h，MBDP转化为贲亭酸甲酯和异戊烯醇，单程转化率87.7%，用85%的磷酸中和甲醇钠，蒸出甲醇，直接用于合成贲亭酸甲酯。

When it passed over the surface of TiO2-Y2O3 with the mass ratio of 3∶1, methanol gas was catalytically oxidized by O2 in air that resulted in intensive chemiluminescence. A novel methanol gas sensor based on this kind of CL was developed.

发现当甲醇气体通过TiO2-Y2O3 (质量比为3∶1)粉体表面时，可被空气中的O2催化氧化产生强烈的化学发光，基于此研制了一种新型的甲醇气体传感器。

Technology program: there are two methods to produce methane chloridate, one is methane chlorination which methane as the original material, the other is methanol hydrochlorinate which methanol as the original material.

技术方案。生产甲烷氯化物的原料路线主要有两种：以甲烷为原料的甲烷热氯化法和以甲醇为要料的甲醇氢氯化法。

The raw material technology that manufactures methane chloride at present basically has methane to heat up chloridize law and law of methanol hydrogen chloridize two kinds, latter already took absolutely advantage, the whole world makes an appointment with the methane chloridize products of 15% only can be to be based on methane law, the others uses methanol method entirely.

目前生产甲烷氯化物的原料工艺主要有甲烷热氯化法和甲醇氢氯化法两种，后者已占绝对优势，全球只有约15%的甲烷氯化物产能是基于甲烷法，其余全部采用甲醇法。

There are two synthetic methods for the two carboxylates starting from pyrrole,(1) the carbonylation of pyrrole using trichloroacetyl chloride and then the esterification reaction in methanol, or 2-MPC can be directly synthesized from pyrrole and methyl chloroformate,(2) the insertation of CO2 to pyrrole for the corresponding 1-pyrrole carboxylic acid or 2-pyrrole carboxylic acid and then the esterification reaction in methanol.

两种吡咯甲酸甲酯的合成从吡咯为起始原料有两种方法：（1）使用酰氯将吡咯酰化，然后与甲醇完成酯化反应，或者吡咯与氯甲酸甲酯直接合成吡咯甲酸甲酯；（2）先将吡咯通过CO2插入反应得到1-吡咯甲酸或2-吡咯甲酸，然后与甲醇反应完成酯化。

Mono-cinnamyl maleate was prepared by esterification of maleic anhydride and cinnamyl alcohol of 1 mol:2 mol at 95 ℃ for 2～4 h.Then added isomeric catalyst and mono-cinnamyl fumarate was made by reacting at 90 ℃ for 4 h.After methanol (methanol:mono-cinnamyl fumarate = 6 mol:1 mol) was added,the mixture maintained at 90 ℃ for 4.0 h to synthesize CMF.

合成试验表明：以摩尔比为1：2的马来酸酐与肉桂醇在95 ℃醇解反应2～4 h后加入异构化催化剂，90 ℃转型反应4 h后，添加6倍摩尔质量的甲醇，在90 ℃恒温反应4 h，反丁烯二酸桂醇甲酯的合成产率较高。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。