烯

The optimized structures and energies of the reactants, intermediates, transition states and products of two reaction channels (corresponding to syn-acraldehyde and anti-acraldehyde) in gas or in methanol solvent were obtained. The potential energy profiles reveal the processes of the trimethylamine-catalyzed Baylis-Hillman reaction between acraldehyde and formaldehyde in gas or in methanol solvent at the microscope level.

通过研究，获得了三种情况下两种反应通道(分别对应于顺式-和反式-丙烯醛)中涉及的反应物、产物、中间体、过渡态的优化结构及其能量，并由此得到了反应的势能面图，在电子微观层次上揭示了三甲胺催化的丙烯醛和甲醛的Baylis-Hillman反应的微观过程。

The method has been used to determine Phthalic esters in drinking water and seawater sample. 3. Single drop microextraction, followed by gas chromatography with flame ionization detection has been applied to determine Formaldehyde, Acetaldehyde and Acraldehyde in water based on 2,4-Dinitrophenylhydrazine derivatization. Extraction solvent, extraction time and stirrer speed were optimized. Optimal experimental conditions were as follows: 1.6μL toluene microdrop exposed for 30 min in a 3ml aqueous sample placed in 4ml vial and stirred at 600 rpm/min.

以2，4-二硝基苯肼衍生，单滴液相微萃取与气相色谱火焰光度检测器联用测定水样中的甲醛、乙醛、丙烯醛，考察了萃取溶剂、液滴大小、萃取时间、搅拌速度、盐效应等对该方法的影响，并对影响液相微萃取的各种因素进行了系统的阐述，确定了该体系的最佳实验条件，实现了甲醛、乙醛、丙烯醛的提取和富集。

Methacrylic acid-acraldehyde/ montmorillonite nanocomposites were prepared using Na+- montmorillonite via in-situ polymerization of methacrylic acid and acraldehyde in aqueous medium.

采用水溶性聚合单体甲基丙烯酸和丙烯醛在钠基蒙脱土层间直接原位插层聚合制备水溶性MAA-AL/MMT纳米复合材料，通过XRD和TEM对纳米复合材料的结构进行表征，采用TGA、DSC研究了纳米复合材料的热性能，同时考察了甲基丙烯酸与丙烯醛配比及体系pH值对纳米复合材料结构及应用性能的影响。

In supercritical carbon dioxide, the Wacker oxidations of acrolein and of acrylic acid were also studied.

在超临界二氧化碳中对其它邻位有吸电子基团的端烯如丙烯醛、丙烯酸的Wacker反应也进行了研究。

Further increasing the Mo content results in the remarkable decrease of acrolein selectivity.

Mo含量进一步增加，催化剂的丙烯选择性增加而丙烯醛选择性下降。

In Fig. 2 the UV-VIS spectrum of acrolein in "allyl alcohol solution" demonstrates that in the range of in- 147 KIRICSI eta.

在图。 2紫外可见光谱中的丙烯醛"丙烯醇解决方案"表明，在范围中， 147 KIRICSI埃塔。

The homogeneous hydrogen transfer of acrolein to allyl alcohol was carried out with aluminium isopropoxide as catalyst.

采用异丙醇铝为催化剂，丙烯醛与异丙醇进行均相氢转移反应合成烯丙醇，对催化剂的再利用及催化剂的失活原因进行了研究。

Esides, Ce ions can accelerate the oxidation-reduction cycle of catalysts in the process of propane oxidation to acrolein.

i-Mo二元复合氧化物催化剂中添加适量的Ce和V组分可进一步提高催化剂晶格氧选择氧化丙烯生成丙烯醛的反应活性。

The results showed that the optimal conditions were as follows: H3PW12O40/Al2O3 exhibited high activity and selectivity at the optimal temperature 330℃ and the load content of heteropoly acid 40%, the glycerol conversion reached 100% with acrolein selectivity of 83.7%.

结果表明，由甘油制备丙烯醛的较优条件为：当催化剂为H3PW12O40/Al2O3，负载量为40%，反应温度为330℃时，丙烯醛的选择性可达83.7％，甘油的转化率为100％。

By adopting phosphowolframic acid loaded by Al2O3 as catalyst for preparing acrolein, the corrosion of equipments could be avoided and the environmental pollution was decreased and the glycerol conversion and mole selectivity of acrolein would be increased greatly.

结论］采用Al2O3负载的磷钨杂多酸作为催化剂制备丙烯醛可避免对设备的腐蚀，减少对环境的污染，大大提高甘油的转化率和丙烯醛的摩尔选择性。

The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.

此刻阴唇已经几乎完全的缝在一起了，排除多余淤血体液的管子和Foley导管从顶端冒出来。

To get the business done, I suggest we split the difference in price.

为了做成这笔生意，我建议我们在价格上大家各让一半。