查询词典 methyl

My favorite vitamin B12 supplement is sublingual methylcobalamin (or "methyl-B12"), which is the most neurologically active form of vitamin B12 - Dr.

我最喜爱的补充维生素B12是舌下含服甲（或称"甲基维生素B12 "），这是最神经的活性形式，维生素B12 -威尔博士

The 1,5-Bis(4-aminophenylazo) anthraquinone, 1,5-bis(4-hydroxyphenyl azo) anthraquinone and 1,5-bis(3-methyl-4-hydroxyphe nylazo) anthraquinone were synthesized by diazotizing 1,5-biaminoanthraquinone with nitrosyl sulfuric acid and coupling with aniline, phenol and o-cresol.

合成以1，5-二氨基蒽醌为原料，经亚硝酰硫酸重氮化，分别和苯胺、苯酚及邻甲酚偶合，得到双（4-氨基苯）－1，5-二偶氮蒽醌，双（4-羟基苯）－1，5-二偶氮蒽醌和双（3-甲基－4-羟基苯）－1，5-二偶氮蒽醌，反应产率达47%~62%。

At the same time, the enthalpy change of 212 kJ/mol for Tempo trapping methyl radical, namely O-〓 bond dissociation energy has been also obtained. This value is close to that of nitrous acid ester and far less than that of nitric acid ester. It is probably due to the relatively strong electron withdrawing capability of nitryl group.

同时我们还测得了甲基自由基与Tempo的反应的焓变，即O—〓键离解能为212 kJ／mol，它接近于亚硝酸甲酯中C—O键的离解能，而小于硝酸甲酯中的键离解能，这可能和硝酸根的吸电子能力较大有关。

For Nitro derivatives of methylbenzenes, the pyrolysis initial reaction is an isomerization reaction. It means the alpha C-H bond in methyl rupture, then the Hydrogen atom transfer to the Oxygen atom in nitryl to form isomer.

甲苯的硝基衍生物的热解引发反应为异构化反应——α_中的C-H键断裂，氢原子转移到邻位硝基(-NO_2)中的氧原子上，生成新的异构体化合物。

Methods We investigated the alterations of N-methyl-D-aspartate receptor 1 (NMDAR1) mRNA in rat cerebral cortex and hippocampus by using digoxigenin labled cDNA probe,nonradioactive in situ hybridization technique.

采用原位杂交技术，研究了马桑内酯致痫大鼠大脑皮层、海马N-甲基-D-天门冬氨酸受体亚单位1(NMDAR1)mRNA表达的变化。

The nonsolvent process of the preparation for oxamyl is suitable for mass production due to its low production cost, high purity, no methyl isocyante remains, easy operation and lower equipment cost.

水相法合成杀线威不需催化剂和溶剂，产品制造成本低，纯度高，反应结束异氰酸甲酯无残留，出料环境好，操作方便，设备投资少，是一种适合大生产的工艺方法

Preparation of low density poly (4 methyl 1 pentene) foam is described.The thermal analysis method is utilized to measure on line the gelation of pmp polymer in the binary solvent (durene/naphthalene) or nonsolvent system.

在聚-4-甲基-1-戊烯pmp）低密度泡沫的制备中，利用示差扫描量热分析仪对pmp聚合物在均四甲苯/萘所组成的溶剂/非溶剂二元体系中的凝胶化过程进行在线测量。

The bio-degradation pathways of NP would be that the long branches in nonyl of NP are firstly degraded into short methyl branches, which come into being a series of short chain alkyl phenols with different branch structures. The middle products should be further metabolized into simpler compounds, such as benzene acetic.

污水生物处理过程中壬基酚可能的初级生物代谢途径是壬基上的长支链断裂为短的甲基链，生成一系列带有不同分支结构的短链烷基酚类代谢产物，进一步的代谢产物有苯乙酸。

There are different methyl branch structures correlated with isomerous nonyl of NP in the alkyls. The primary metabolites from the dominant bacteria experiment have alkyl phenols and benzene acetic.

研究结果表明，活性污泥降解壬基酚的初级代谢产物主要为C4～C6烷基取代苯酚，烷基链的结构差异与其母体壬基的异构方式有关，烷基上的支链主要为甲基；优势降解菌群代谢壬基酚的初级产物除烷基苯酚外，还有苯乙酸等。

The factory produces gasoline, diesel oil,naphtha,LPG,nonyl phenol,methyl ethyl ketone,MTBE,chemical auxiliaries,dodecene and nonene, etc.

主要产品：汽油，柴油，石脑油，液化石油气，壬基酚，甲乙酮，甲基叔丁基醚，化学助剂，十二烯，壬烯等。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。