查询词典 direct-axis

Methods The treatment group of 20 cases was treated with 1% ethoxy scelerotic alcohol and the contrast group of 20 cases was treated with 5% sodium morrhuate,both under the direct vision of gastroscope.

4 0例患者随机分为A、B两组，患者各 2 0例，分别应用 1%乙氧硬化醇、5 %鱼肝油酸钠在胃镜直视下对曲张静脉注射治疗。

There were egregious acts of piracy - for instance, the illicit copying of the Aldine Latin "pocket books", or the all-pervasive piracy in England in the 17th century (a direct result of over-regulation and coercive copyright monopolies).

有恶性海盗行为--例如，非法复制该aldine拉丁"袖珍图书"还是无孔不入的盗版在十七世纪的英国(直接造成过度监管和强制著作权垄断)。

The catalytic effects of 1a on the direct aldol reaction in water were much better than that of 1b.

与有机相中的反应相比，在水中反应时，1a比1b催化活性更高。

Its zinc complex was applied in asymmetric direct aldol reaction of acetone and p-nitrobenzal...

设计合成了一种NOBIN衍生的手性配体，初步研究了该手性配体的双核锌配合物在对硝基苯甲醛和丙酮的不对称直接醇醛缩合反应中的催化应用，20℃和20mol％催化剂量下，获得了32.5％ee和72％收率的产物。

Synthesis of novel 4-long alkoxyl-L-prolines and their application in catalytic asymmetric direct aldol reaction.

一、研究了新型长链烷基脯氨酸的合成及其作为有机小分子催化剂催化的直接不对称Aldol反应 1。

The catalytic mechanism of prolinamide phenol on the direct aldol reaction was studied using quantum mechanics theory.

利用量子力学理论研究了脯氨酰胺酚类催化剂催化直接不对称Aldol反应的机理。

In order to examine the catalytic activity of the new catalysts, we have carried out the direct asymmetric Aldol reaction of tetrahydro-4H-thiopyran-4-one with aldehydes.

催化剂的基本结构单元如下：为了检验新型有机催化剂的催化活性，我们研究了硫代四氢吡喃酮和各种醛的直接不对称Aldol反应。

We first examined the ability of the catalyst to promote the direct aldol reaction between acetone and 4-nitrobenzaldehyde under various conditions.

通过偶联反应将催化剂1固载到硅胶上，并将其用于催化环己酮和硝基苯甲醛的aldol反应，dr值最高达到90：10，ee最高76%。

In part Ⅰ, the aquous direct aldol reactions catalyzed by small organo-catalyst—imidazolc were studied in detailed.

本文第一部分详细研究了咪唑为有机小分了催化剂催化水相直接羟醛缩合反应。

We found that when acetone was used as solvent, in the presence of TFA, cis-4-pyrrodin-1-yl-L-proline could catalyze the direct asymmetric aldol reaction between acetone and 4-nitrobenzaldehyde with 84% ee.

研究发现，该催化剂以丙酮为溶剂时，加入催化剂等当量的三氟乙酸可以较好的催化丙酮与对硝基苯甲醛之间的直接不对称Aldol反应，得到84%的ee值。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。