查询词典 silica

The combined capacity for siloxane and pyrogenic silica is planned to be approximately 200,000 metric tons per year.

该硅氧烷和气相二氧化硅工厂合作项目的一期工程已于2008年11月中旬完工并投入运营。

Polyimide/silica (PI/SiO2) nano-hybrid films of different solid content were prepared based on pyromellitic dianhydride and 4, 4'-oxydianiline using tetraethoxysilane as the inorganic precursors.

以均苯四甲酸二酐和4，4'-二氨基二苯醚为有机单体，正硅酸乙酯为无机前驱体，制备了SiO2含量一定，PAA杂化胶液固体含量不同的PI/SiO2纳米杂化薄膜。

Free silica in geological exploration dust is measured by both Xray diffraction and pyrophosphoric acid methods.

对粉尘中游离二氧化硅含量进行了X线衍射法和焦磷酸消化法的对比测定。

Methods Combined normal silica pressure column with L-aa-OCH3HCl as chiral pool, four racemic mixtures were synthesized and separated.

利用普通的硅胶加压柱联合L-氨基酸甲酯盐酸盐作为手性衍生化试剂将具有同一结构式的4个外消旋混合物进行了分离。

Take silica gel chromatography eluting with EtOAc / petroleum ether(1:9～5:5). The production was washed several times by MeOH, and dissolved in dimethyl formamide to recrystallize, we got yellow power crystal.

结果：(1)HPLC检测含量大于95％，符合对照品的要求；(2)理化鉴别实验均与文献吻合；(3)紫外、红外、质谱、核磁共振的光谱结果均与文献值一致，确定产物为金松双黄酮。

Methods:Purchased spherical silica particles (5 μm) were refluxed in anhydrous toluene with vinyl-triethoxysilane for 18 h, to modify the surface with vinylsilyl groups.

将商品球形硅胶颗粒(粒径5μm)与乙烯基三乙氧基硅烷通过在无水甲苯中回流18 h，进行硅烷化修饰。

Dust from brick cutting may contain respirable particles, which may also include harmful silica dust.

切割砖块时产生的灰尘中含有可吸入的颗粒，它含有害的二氧化硅。

WARNING:This product contains crystalline silica,which in airborne particles of respirable size is known to cause cancer.

注意：如眼神接触、洗净，用温水如过敏现象持续发生，就医，在皮肤接触，用肥皂和水警告：本品含硅晶体，在空气中的微粒的大小是呼吸致癌让儿童接触不到的地方。

A factory has more crystalline free silica proportion in respirable dust than B factory.

可呼吸性粉尘中之石英含量则A厂显著高於B厂。

The coupling agents has no obvious effect on the hardness when nano powders were used as strengthened particles.When liquid silica was used to fabricate the composites,nano particles were wraped by PTFE,reunition was prevented.Whil...

其作用机理为当用固体纳米粉末填料时，由于纳米粉末的团聚作用，丧失了部分纳米颗粒的表面特性，界面结合较差，硬度较低；而使用液体纳米硅溶胶制备PTFE复合材料时，纳米颗粒在搅拌蒸发的过程中被PTFE大分子包裹，可以有效防止团聚的发生。

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。