查询词典 methyl

The conventional process for the synthesis of rubber antioxidant 4020 from the 4-anino diphenylamine and methyl isobutyl ketone under high pressure can be replaced by a new three-step process using p -aminophenol, methyl-isobutyl ketone, formic acid and aniline as raw materials.

以橡胶防老剂4020合成新工艺小试条件为依据，完成了放大试验过程的工艺研究，改变了传统的在高压下以较大分子为原料合成橡胶防老剂4020的工艺路线。

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。

Methods Gelators of N-lauroyl-l-alanine methyl esterand N-lauroyl-l-alanine ethyl esterwere synthesized with l-alanine methyl ester,l-alanine ethyl ester and lauroyl chloride as materials.

方法以l-丙氨酸甲酯盐酸盐、l-丙氨酸乙酯盐酸盐和月桂酰氯为原料，合成月桂酰-丙氨酸甲酯凝胶因子及月桂酰-丙氨酸乙酯凝胶因子，采用IR、1H-NMR、MS对其结构进行表征，并对其熔点、热稳定性、在各种植物油中的最小胶凝质量浓度、相转变温度等基本性质进行了研究。

Results the resolution and linearity of eucalyptol, camphor, synthetic borneol, menthol, methyl salicylate, cinnamaldehyde and eugenol were good with the recovery rate of eucalyptol at 98.7 %(rsd=1.1 %) camphor at 99.0 %(rsd=1.0 %), synthetic borneol at 99.4 %(rsd=0.8 %), menthol at 99.7 %(rsd=0.4 %), methyl salicylate at 99.6 %(rsd=0.5 %), cinnamaldehyde at 99.5 %(rsd=0.8 %), eugenol at 99.5 %(rsd=0.9 %), respectively.

结果在该色谱条件下桉油精、樟脑、冰片、薄荷脑、水杨酸甲酯、桂皮醛、丁香酚的分离度和线性关系良好，平均回收率（n＝6）分别为98.7 %（rsd＝1.1 ％）、99.0 %（rsd＝1.0 ％）、99.4 %（rsd＝0.8 ％）、99.7 %（rsd＝0.4 ％）、99.6 %（rsd＝0.5 ％）、99.5 %（rsd＝0.8 ％）、99.5 %（rsd＝0.9 ％）。

They were eucalyptol, bicyclo［2.2.1］heptan-2-one,1,7,7-trimethyl-,(1R)-, borneol, 1-methyl-2-(1-methyl ethenyl)-(1R-cis)-cyclobutaneethanol, limonene, 1-hydroxymethyl-7,7-dimethy lbicyclo［2.2.1］heptan-2-one,-spathulenol, 3,7,11,15-Tetramethyl-2-hexadecen-1-ol, isocitronellol,-9-Octadecenoic acid, heneicosane, respectively.

阿给中共有11个阿给炭没有检测出的成分，包括桉油精、D-樟脑、冰片、(1R-cis)- 1-甲基-2-(1-甲基乙烯基)环丁基乙醇、二戊烯、1-羟甲基-7，7-二甲基-双环［2.2.1］庚-2-酮、-匙叶桉油烯醇、3，7，11，15-四甲基-2-十六碳烯-1-醇、异香茅醇、-9-十八碳烯酸和廿一烷。

Methanol heterogeneous selective oxidation to methyl formate is developed recently. As methyl formate is more and more important, study of this process is of significance.

甲醇非均相的选择性氧化制甲酸甲酯是一个崭新的课题，由于甲酸甲酯在一碳化学中地位的提高，这项研究有预见性的创新性。

In the aspect of the photocatalytic activity, we did some experiments and tests: TiO_2 hydrosol degradated methyl orange, TiO_2 powder degradated acetone, TiO_2 films degradated formol and TiO_2 films degradated methyl orange, confirming that the as-prepared sample possessed preferable photocatalytic activity.

在光催化活性方面，测试了TiO_2水溶胶降解甲基橙、TiO_2粉末降解丙酮、TiO_2薄膜降解甲醛和TiO_2薄膜降解甲基橙的实验，证实了所制备的试样具有较好的光催化活性。

Research on methyl bromide alternatives is one of the hot issues in the area of current pest control. To study and develop new alternative fumigant, re-evaluate current fumigants are the focus of methyl bromide alternatives research.

溴甲烷替代研究是当前有害生物控制领域的热点问题之一，研究开发新的替代熏蒸剂，重新评估已有熏蒸剂，是溴甲烷替代研究工作的重点。

Separation of 2-methyl-1-butanol and 3-methyl-1-butanol from fusel oil can not only change wastes into valuables but have important economic, social and technology innovative benefits.

回收利用杂醇油中的旋性戊醇和异戊醇不仅可以变废为宝，而且具有重要的经济、社会效益和技术创新意义。

By using efficient padding, fusel oil was exactly distilled twice after being preliminarily dealt with. And then we got highly pure 2-methyl -1-butanol and--2-methyl -1-butanol.

采用高效填料，通过对预处理后的杂醇油进行两次精密精馏，得到了高纯度的2-甲基-1-丁醇和--2-甲基-1-丁醇。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。