FCC catalysts using silica sol as the binder features improved selectivity to coke and higher resistance to attrition. strength of the catalysts can be enhanced by adding surf…
含硅粘结剂的催化剂抗磨损能力和焦炭选择性较好，催化剂的强度可以通过添加表面活性剂和铝盐得到改善。
Selectivity may be improved for some analytes by incorporation of separation steps prior to immunoassay.
在免疫测定前加入分离步骤，一些分析物的选择性可能会提高。
Compared with free lipase, the thermostability(thermal stability) of immobilized lipase was improved(increased) by 30%; however, no significant changes in selectivity was observed.
与游离脂肪酶相比较，固定化脂肪酶热稳定性提高了30%，而选择性没有显著变化。
The hydrogenation efficiency, selectivity and life-time of copper-based catalysts have been improved after the modification of the catalysts.
铜催化剂改良后，提高了加氢效率、选择性和使用寿命。
The catalytic activity declined as the selectivity of paraxylene and ortho-xylene improved with increasing treated temperature.
随着处理温度的提高，催化剂的活性降低，对二甲苯和邻二甲苯的选择性上升。
For the purification process for complexing of cholesterol, change of complexing reagent from Ca-C to Ca-D improved complexing selectivity and cholesterol yield.
对胆甾醇配合及其提纯过程，将配合试剂从原来的钙盐C改为钙盐d，大大提高了配合的选择性和胆甾醇收率。
The poor acrolein selectivity of this catalyst was improved by continuous use in the catalytic oxidation for making the particle size of the dispersed bismuth molybdate larger.
我们还发现，在催化氧化环境中连续使用的钼酸铋粒径会越来越长，对丙烯醛的选择性会相应提高。
Selectivity of response for individual components of the measured gases can be improved by using specific material for the measuring electrodes, in particular semiconductors.
对每一个测量组分的选择性可通过测量电极材料的选择特别是通过加进半导体来改善。
The activity, olefin selectivity and thermal stability of F -T catalyst can be improved by using ultrafine particle with a suitable promoter.
利用超细粒子并选用适当的助剂提高了F-T过程的反应活性，选择性和热稳定性。
The perfermance test on a commercial riser cracker shows that meta-Y-3A molecular sieve cracking catalyst is of high activity and improved gasoline selectivity.
偏Y-3A分子筛裂化催化剂在提升管催化裂化工业装置上使用试验的结果表明，该催化剂的裂化活性较高，汽油选择性较好。
DU 122290 was developed from sultopride and shows improved activity and selectivity. Suggest possible reasons for this.
DU 122290是由舒多普利改进得到的，增强了活性和选择性。请解释可能的理由。
The results show that the selectivity for oxygen and nitrogen has been improved obviously due to the addition of TMS-MC, while the permeability velocity for oxygen is decreased.
研究结果表明，由于TMS-MC的加入，复合膜的透氧性能有所下降，但氧氮选择性能有了显著提高。
The slope selectivity and the stopband of the filters are further improved by utilizing a combination of source-load coupling and over-moded cavities in the same filter.
在同一个滤波器中同时使用源端负载端耦合和多模腔融合技术，使滤波器的频率选择斜率和阻带性能得到改善。
The method has the characteristics of simple operation, good selectivity, cleanness and environment protection, so the yield and the quality of the valine are obviously improved.
该方法具有操作简单、选择性好、清洁环保的特点，使缬氨酸的收率和质量得到显著提高。
The method has the characteristics of simple operation, good selectivity, cleanness and environment protection, so the yield and the quality of the valine are obviously improved.
该方法具有操作简单、选择性好、清洁环保的特点，使缬氨酸的收率和质量得到显著提高。
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