查询词典 cyclopentadiene

But network words, although has the rich multimedia resources, can the sound shape and the cyclopentadiene, but also has its shortcoming.

而网络的话呢虽然有丰富的多媒体资源，能声形并茂，但也有它的缺点。

Because of the instability of the cyclopentadiene monomer, it must be used immediately after distillation in the preparation of ferrocene.

由於环茂二烯单体是不稳定的，在蒸馏后必须立即用作制备二茂铁。

In there compounds, the cyclopentadiene ring has only four hydrogens.

在这些化合物里，环戊二烯环只有4个氢。

Because of the instability of the cyclopentadiene

由于环茂二烯单体是不稳定的

I cyclopentadiene companies from the methylation of MMT to the synthesis, entirely by domestic procurement of raw materials, in the "quantity" can be fully guaranteed for production.

我公司从环戊二烯的甲基化到MMT的合成，原料完全由国内采购，在&量&上可完全保证生产所需。

The preparation method of cyclopentadiene from bicyclopentadiene with liquid phase thermal decomposition method is studied.

研究了采用液相热分解法由双环戊二烯制备环戊二烯的实验条件。该法操作简单，环戊二烯纯度达95%，收率可达85

The preparation method of cyclopentadiene from bicyclopentadiene with liquid phase thermal decomposition method is studied.

研究了采用液相热分解法由双环戊二烯制取环戊二烯的方法。该法操作简单，连续化。环戊二烯纯度达98％－99％，收率85

Present status and application of isoprene,cyclopentadiene and m-pentadiene in cracking C_5 fraction products were reviewed.

重点介绍了国内外裂解C5分离产物异戊二烯、环戊二烯和间戊二烯利用近况，提出C5综合利用具有很广阔的发展前景和现实意义。

To establish a method for determination of cyclopentadiene,dimethylformamide and N-methylpyrrolidone simultaneously in isoprene by GC.

用毛细色谱法建立异戊二烯中各组分定性分析方法及环戊二烯，N-甲基吡咯烷酮，N，N-二甲基甲酰胺的测定方法。

The catalytic performance of a series of supported KNO3 solid bases for the synthesis of methylcyclopentadiene via cyclopentadiene methylation with methanol was investigated.

考察了负载型KNO3固体碱对环戊二烯和甲醇的甲基化制备甲基环戊二烯反应的催化性能。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。