Their catalytic activity were evaluated by comparing their structure and basicity. The mechanism of the reaction has also been discussed.

通過結(jié)構(gòu)特點和堿性強(qiáng)弱解釋評價其催化活性91亚洲精品福利在线播放，并且對反應(yīng)機(jī)理進(jìn)行了初步探討。

The match of the acidity and basicity is very important to obtain good reactivity and high yield in the bifunctional organocatalyst system.

在雙功能催化的Aldol反應(yīng)中99精品视频精品精品视频，要獲得高的反應(yīng)活性和好的收率午夜成年人网站，催化劑的酸性基團(tuán)和堿性基團(tuán)的酸堿強(qiáng)弱匹配非常重要。

It is a very important step to establish a bench rapid aging test cycle which should be comparable with the road running test.

如何對安裝在摩托車上的催化轉(zhuǎn)化器進(jìn)行可靠性考核www.污黄视频在线看，是很關(guān)鍵的環(huán)節(jié)人人人澡人人人看人人人看。

This catalytic system can be used in the preparation of a broad range of esters.

該催化劑適用于醛與多種底物醇的氧化酯化反應(yīng)，尤其是對于一些長鏈飽和醇也有很好的催化活性狂插乱捅。

Applied conductance law is kinetic to reaction of bee glue enzymatic catalysis undertake study, result discovery, in bee glue - in enzymatic system, be in without oscillation phenomenon; bee glue - enzymatic - inside NaCl system, electrical conductivity lifts quickly, appeared only 3 more apparent fluctuant peaks, accumulate period longer, it is 10~20 Min about, accumulate period afterwards, electrical conductivity lifts quickly reduce quickly again, fluctuant and gently; is in after 40 Min bee glue - enzymatic - inside KCl system, response is quick, oscillation period is 20 Min about, the wave motion after 30 Min is slow till platform reacts,stop.

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Synthesis of novel sulfonamide-prolinols and their application on the asymmetric addition of diethylzinc to benzaldehyde.

三禁18在线观看免费视频、研究了脯氨酸衍生的新型手性磺酰胺-氨基醇的合成及其催化二乙基鋅對苯甲醛的不對稱加成反應(yīng) 1。

There are many methods of preparing benzaldehyde, but it has been little reported in civil that benzaldehyde is prepared through hydrogenation of benzoic acid.

它的制備方法較多欧美性爱在线免费观看视频，而用苯甲酸為原料800avzaixian热久久，采用催化加氫還原法文獻(xiàn)報道較少。

Dozens of analogues with modification at benzene ring were synthesized by using a metal-catalysis coupling.

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It is an economic, efficient method to treat the waste of Benzene by the catalytic combustion.

采用催化燃燒的方法治理苯系廢棄物是一種經(jīng)濟(jì)、高效的方法欧美性在线观看视频。

When benzene is used as carbon source, there is a higher yield of CNTs.

系統(tǒng)研究了浮動催化法制備碳納米管的工藝規(guī)律日婬片A片AAA毛片在线少妇。