查询词典 isomerization

Different preparative conditions were required in Esterificational Reaction and Pentane Isomerization Reaction.

在异构化反应中，焙烧温度在500℃时制备的催化活性最高，当反应温度50℃最高转化率24.070/0，35℃时最高转化率7.23%。

Using the Esterificational Reaction and the Pentane Isomerization Reaction as probes, catalytic activity of these superacids which were prepared by different process conditions such as different concentration of H2SO4, immersing time.

研究了不同的H_2SO_4浓度，H_2SO_4浸泡时间，焙烧温度，焙烧时间，包覆次数制备的催化剂催化酯化反应及正戊烷异构化反应的活性，并将其结果和表征结果进行了关联。

Nanometer composite S2O(superscript 2- subscript 8)/SnO2-TiO2 was used as a catalyst in α-pinene isomerization.

首次将纳米复合S2O(上标 2-下标 8)/SnO2-TiO2用于催化α-蒎烯异构化反应。

This way of isomerization adapts to safrole oils with both high and low concentration.

此方法结果更理想，温度更低、时间明显缩短，污水量少，适用黄樟油素的含量范围较宽。

Mordenite has a significant effect on the activity of catalyst, results of test showed: with soluble glass as main feedstock and addition of crystal precursor, thecrystalization time can be reduced, and the synthesized mordenite has higher surface area and structure of small crystal particulate and big pore diameter. Through ion exchange with ammonium and acid, the synthesized mordenite is suitable to prepare isomerization catalyst.

丝光沸石对催化剂活性有较大影响，试验结果表明：以水玻璃为主要原料，加入晶种可缩短晶化时间，合成的丝光沸石具有较高的比表面积及小晶粒大孔径结构，经铵交换及酸交换后适于制备异构化催化剂。

The problem of photophysics, spectrum and photo-isomerization of bisbenzoxadyl stilbene in different solvents were studied carefully.

对双苯并唑茋化合物在不同极性溶剂中的光谱、光物理及光顺反异构化问题进行了详细研究。

Therefore, the metabolic pathway from soybean oil to erythromycin was presumed as follows: soybean oil is metabolized into TCA pathway to generate much α ketoglutaric acid and then generate succinyl CoA by strengthening TCA pathway, and the methylmalonyl CoA is formed from succinyl CoA by isomerization. Finally, methylmalonyl CoA can be used as the precursor for the biosynthesis of erythromycin.

推测豆油经过红色糖多孢菌代谢后进入红霉素合成的一条可能途径：豆油经过代谢后进入TCA循环，并强化了TCA循环的通量，产生了大量α酮戊二酸，再生成琥珀酰CoA，琥珀酰CoA在甲基丙二酰CoA异构酶的作用下生成甲基丙二酰CoA作为红霉素合成的前体。

CoA by strengthening TCA pathway, and the methylmalonyl??CoA is formed from succinyl??CoA by isomerization. Finally, methylmalonyl??CoA can be used as the precursor for the biosynthesis of erythromycin.

餐？戊二酸，再生成琥珀酰CoA，琥珀酰CoA在甲基丙二酰CoA异构酶的作用下生成甲基丙二酰CoA作为红霉素合成的前体。

Second, using DBU as the base for enolization of propargylic esters of unsaturated acids 18e-k, we developed a tandem Ireland-Claisen rearrangement /isomerization reactions. It has been shown that the reaction sequence affords triene molecules 42a-b and 43a-b in moderated to high yields. Interestingly, with allyl hexa-3,5-dienoates 18i-j as the substrate, the rearranged products underwent further aromatization to give uniquely substituted benzyl acids 44a-b.

其次，以含有活泼质子的烯酸炔丙酯18e-k为底物，在DBU为烯醇化碱、TMSCl为硅试剂的条件下，底物18e-h发生了Ireland-Claisen重排/异构化串联反应，得到完全共轭的三烯类化合物42a-b及43a-b；而以己二烯酸炔丙基酯18i-j为底物时，重排/异构化后的产物进一步发生电环化等反应最终得到芳构化产物——取代苯甲酸类化合物44a-b。

Rosin acids ; isomerization ; abietic acid ; orthogonal experiment

松香树脂酸；异构；枞酸；正交实验

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。