查询词典 silica

Two times hydrolyzation of Fe~(3+) and Cr~(3+) was firstly pointed out in the process of pillar preparation with hydrothermal method. In order to improve the thermal stability, Fe/Cr-Si-pillaring agent solution was synthesized by hydrolyzing Fe~(3+) and Cr~(3+) solution on the surface of silica sol, and Fe/Cr-Si-pillared montmorillonite (Fe/Cr-Si-PILM) was prepared with conventional method and hydrothermal method. Because the technical innovation of preparation is the best way to improve the PILM properties, two novel methods (Microwave method and Ultrasonication method) have been studied to synthesize Fe/Cr-PILM.In order to expand PILMs new application in the field of coal conversion, catalytic activity of Fe/Cr-Si-PILM catalyst in LongKou lignite and ShenHua coal residue liquefaction was discussed and characterized in the last part of this paper.

研究证明：蒙脱石的预处理是可行的，我们以预处理后的Ca-M为原料，研究并优化了PILM的水热法制备工艺，提出了金属离子的二次水解法；为了提高PILM的热稳定性，我们自制了硅溶胶，合成了Fe／Cr-Si三元复合柱化剂，并制备了Fe／Cr-Si-PILM；在PILM合成中，制备技术的革新是改进PILM性能的重要方法，为此我们探索了微波合成法和超声波合成法在制备Fe／Cr-PILM中的应用；最后，我们选择龙口褐煤和神华煤液化残渣为研究对象，探索了Fe／Cr-Si-PILM催化剂在煤炭液化中的应用，希望能开拓PILM应用的新领域。

IC(50)=25.02 μg/ml was detected, The compound came from n-butanol extract of Plantago asiatica L. via silica column chromatography.

实验结果表明，车前子正丁醇提取物经硅胶柱层析所得到的第二段收集物中所含物质对DU145细胞生长具有很强的抑制活性，其IC_(50)值为25.02μg／ml。

Some evidences prove that the viscosity of straw soda pulping black liquor will be reduced after it is circulated for several times in the cooking, and the contents of silica and polyose are decreased.

结果表明，随着黑液循环达到平衡，抽提的黑液黏度下降，黑液中二氧化硅含量以及聚糖含量减少。

In addition, highly pozzolanic ash can be produced by means of controlled combustion, when silica is kept in non-crystalline form and cellular structure.

此外，高火山灰性灰可以通过控制燃烧来产生，此时，二氧化硅保持在非结晶形式和蜂窝状结构。

The analysis indicates that micropacking silica fume works to the density and relative density of RPC, and its pozzolanic effect helps the strength of RPC.

硅灰的微填充效应有利于提高活性粉末混凝土的密度和相对密度，而火山灰效应有利于提高其强度。

C18 esterified silica monolithic column emerging from chromatogram realm was made by use of solid-phase extraction medium material in μ-TAS. Several simple solid-phase extraction pretreatment units were set up to preconcentrate dobutamine hydrochloride which was detected by dobutamine hydrochloride-KMnO4-Luminol chemiluminescence system.

以改性C18反相硅胶整体柱为微流控芯片分析系统中固相萃取介质材料，构建不同功能单元的样品预处理微分析系统，实现了血清样品中痕量盐酸多巴酚丁胺的富集。

Even carbon number alkenes, phthalic esters and nitrogen heteroatom-containing components were detected in the elution fractions, while such components were not detected without silica gel column separation, indicating that preseparation is very important for increasing the sensitivity of GC/MS analysis.

各洗脱馏分用GC/MS分析，其可测成分与直接检测相比，多检测出偶碳烯烃、邻苯二甲酸酯类和含氮化合物等，表明合适的预分离对提高GC/MS分析的灵敏度非常重要。

Their pure products of the six compounds were obtained by silica gel column chromatography and recrystallization in propanone solution.

通过硅胶柱色谱分离和重结晶对所得的六种化合物纯化后获得它们的纯化合物。

Pure silicalite only exposed at surface is silica-bearing rocks of protore beds experiencing extreme oxidation at surface as additional production while generating oxidized manganese ores

纯硅质岩仅见于地表，是含硅质的矿胚层岩石，在地表经强烈氧化作用形成氧化锰矿石同时产生的&副产品&。

Geochemical study indicates that constant elements, microelements and trace elements in manganese ores and protore wholly take on thermal sedimentary characteristics, the siliceous limestone, silica-bearing limestone and bioclastic limestone is predominant protore beds of manganese-capped ores.

通过对锰矿石和矿胚层岩石中常量元素、微量元素及稀土元素等地球化学的研究，均具有热水沉积的特征，硅质灰岩、含硅质灰岩和生物碎屑灰岩是锰帽型矿石最主要的矿胚层。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。