Silica gels with the high specific surface area and the high adsorption activity have been prepared from water glass and HCL through the process of adding surfactant.
以水玻璃和盐酸为原料，通过添加表面活性剂制备出高比表面、高吸附活性的硅胶。
The effect of the pore volume and surface area of hydrotreating catalyst on its activity was studied.
考察了加氢精制催化剂的孔容和比表面对其活性的影响。
These signals are from the cardiac tissue closest to the electrode, displaying a localized area instead of the electrical activity of the whole heart, as in the case of a surface EKG.
这些信号来自于最接近电极的心脏组织，显示局部区域，而不是整个心脏的电活动，如在表面ekg的情况下那样。
The results showed that under certain condition, the trend of the properties of Kaolin Clays, such as surface area, pore volume, pore size distribution and cracking activity etc.
在不同的温度、时间、酸浓度等条件下，用不同的无机酸对高岭土进行改性处理，考察其改性后的比表面、孔容、孔径分布及裂化活性的变化。
The surface area, the pore volume and the activity of isopropanol decomposition reaction are only a function of exchange degree and are not affected by the exchange methods.
固相交换样品的比表面、孔容变化和异丙醇分解反应活性都与液相交换样品相同，只是交换度的函数，与交换方法无关。
The underlying surface conditions of Loess plateau area have been changing great because of human activity, which results in affecting the features of producing run-off and conveying sand.
在人类活动的影响下，黄土高原地区的下垫面条件发生了很大变化，这种变化影响了流域的产流输沙特性。
Experiments find activity of hydrogenation catalysts and product yields have direct relation with the copper crystalline size and surface area.
通过实验发现，加氢催化剂的活性和产物收率与催化剂中铜晶粒大小及表面积有着直接的关系。
The high purity, high surface area, large pore volume and proper pore structure of active carbon as a support for ruthenium catalyst usually lead to high catalytic activity for ammonia synthesis.
具有高纯度、高比表面、大孔容及合理孔分布的活性炭载体有利于活性组分有效均匀的分散，制备出高活性的氨合成钌催化剂。
Effects of amount of DEAE, surface area and pore diameter on the activity of immobilized aminoacylase were investigated.
考察了树脂功能基含量、比表面和孔径对固定化酶活的影响。
The resu1ts show that the larger the pore volume and surface area based on loading volume of hydrotreating catalyst, the higher of the catalyst activity based on LHSV.
实验结果表明，单位装填体积催化剂的孔穿和比表面越大，则对应体积空速的催化剂活性越高。
Catalyst activity was determined by not only specific surface area of catalyst but also the distributions of active center and utilization ratio of internal surface.
催化剂活性不仅与比表面有关，还与其活性中心分布情况、内表面利用率有关。
Physical and chemical characterization of the catalysts as well as some import catalysts also was carried out by means of atomic spectra, activity and BET surface area measurement, XRD and IR etc.
用原子吸收、碘价分析、BET比表面测定、XRD和IR等手段对上述催化剂以及进口催化剂进行了物理和化学表征。
Physical and chemical properties of the catalysts were studied using activity measurement, BET surface area measurement, XRD, TG DTA and IR spectra etc.
用原子吸收、碘价分析、活性和BET比表面积测定及XRD、TG -DTA、IR等手段，对催化剂和产物进行了物理和化学表征。
The results showed that the properly high temperature could reduce the specific surface area and surface activity, at the same time increased the stability of the catalysts.
结果表明，适当高的焙烧温度降低了催化剂的比表面积和表面酸性，提高了催化剂的稳定性。
Effects of amount of DEAE (diethylaminoethyl), surface area and pore diameter on the activity of immobilized aminoacylase were investigated.
考察了树脂功能基含量、比表面和孔径对固定化酶活的影响。
The BET surface area of the catalysts and the amount of oxalate in the preparation process did not show significant influence on the activity.
草酸络合剂与偏钒酸铵的比例对催化剂的性能影响不大，所制备的催化剂在氯苯催化燃烧中具有良好的稳定性。
The BET surface area of the catalysts and the amount of oxalate in the preparation process did not show significant influence on the activity.
草酸络合剂与偏钒酸铵的比例对催化剂的性能影响不大，所制备的催化剂在氯苯催化燃烧中具有良好的稳定性。
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