选择性

Objective To evaluate the effect of ultraselective renal artery embolization with hydrogel spring coil in the treatment of renal injury.

目的评价以水凝胶弹簧圈为材料的超选择性肾动脉栓塞术在肾损伤中的应用效果。

The selective reduction of sulfur dioxide with hydrogen to elemental sulfur is studied over Ru/Al 2O 3 in this paper.

本文对用H2 来使SO2 选择性催化还原为单质硫在Ru/Al2 O3催化剂上的行为进行研究。

The contacting may be executed in the presence of hydrogen at conditions effective to selectively hydrogenate the highly unsaturated hydrocarbon to an unsaturated hydrocarbon.

该接触可在氢气的存在下在有效地将所述高度不饱和烃选择性加氢成不饱和烃的条件下实施。

The reaction results showed that the complex ctalytic system consisted of ethanol and a kind of promoting agents was very effective to hydrogenate selectively avermectin into ivermectin.

研究结果表明，在合适反应温度和压力的两相催化体系中，阿维菌素的转化率可以达到99%以上，生成伊维菌素的选择性高于95%。

It is important in theory and practice to study new technology in preparation high capability catalyst of MA hydrogenation.

随使用催化剂和工艺条件的不同，原料的转化率和目标产物选择性将有较大差别。

The effects of temperature and catalyst concentration on hydrogenation activit...

同时讨论了该氢化体系的温度和催化剂的浓度对氢化活性和选择性的影响。

In chapter 5, we study the rule of selective hydrogenation of CNB.

第五章对氯代硝基苯选择性加氢规律进行探讨。

Hydrozinolysis and hydrogenolysis reduction with high yield and excellent selectivity was the best process among the three.

肼解还原法是三种方法中产率最高，选择性最好的方法。

The transition metal carbides were a new class of catalysts which had good catalytic activity and selectivity and were widely used in hydrogenolysis,dehydrogenation,desulfidation,denitrification,reforming,and other hydrocarbon conversion reactions.

过渡金属碳化物作为一种催化新材料得到了人们广泛的关注，在催化加氢、脱氢、脱硫、脱氮和重整等方面，表现出优良的催化活性和选择性。

Adding Cr in the catalyst enhances the selectivity to benzaldehyde (from 85.6 to 91.2％ at 400℃). Cu or Ti is very beneficial for the hydrogenation of methyl benzoate to toluene or the hydrogenolysis of methyl benzoate.

Cr调变的催化剂提高了甲醛选择性(在400℃，从85.6提高到为91.2％)，Cu和Ti调变的催化剂则显示较高的苯甲酸甲酯深度加氢活性，即氢解活性。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。