查询词典 silica

Afterward, people found the silica gel, guar gum and carrageenan also could be used in some situation.

后来，又发现无机硅胶、瓜尔胶、卡拉胶在某些情况下可用作凝固剂。

The procedure can be simply described as follows: heteroatoms source such as AlCl3 or TiCl4 is added into the reaction system together with silica source and surfactant and heteroatom species will uniformly dispersed in the form of ions.

调节pH值的目的在于使杂原子物种不再以离子形式而以酸根形式存在从而可以与孔壁上的硅羟基通过缩合结合在一起从而进入介孔骨架。

When the mesostructure is basically formed, the pH value of the reaction system is adjusted to 7-8 and then the hydrothermal crystallization is prolonged for some time to obtain heteroatom-incorporated mesoporous silica. The aim of adjusting pH value to near neutral is to change heteroatom species from the cationic to oxo form and therefore can enter the mesoframework through condensation with silanol groups in the wall.

该方法主要的特点是：操作简单（以调节体系pH值代替繁琐的后处理过程），效率高（可以得到Si/Al=5且铝物种全部处于四配位的骨架位置的Al-SBA-15），不破坏产物有序结构（产品具有高度有序的介孔结构），具有普遍性（适用于多种杂原子的掺杂如铝、钛、钒）。

The water-soluble holothurian glycosides were purified by macroporous resin and silica gel column chromatograghy, and the antifungal activities of different glycoside fractions were investigated.

先后利用大孔树脂柱层析和硅胶柱层析对水溶性海参皂苷进行了纯化，并对各种纯化组分的抗真菌活性进行了测定。

Results show that silicon of high crystalline quality is homogeneously distributed inside the voids of silica template.

研究结果表明：Si在SiO2微球空隙内具有较高的结晶质量，填充致密均匀；通过控制沉积条件，可控制硅的填充率；制备的硅反蛋白三维光子晶体在近红外区（1.4μm左右）具有明显的光学反射峰，表现出光学带隙效应，测试的光学性能与理论计算基本吻合。

Horsetail is a plant source of silica.

马尾草是一个植物来源的二氧化硅。

Contains Horsetail Herb Extract, a natural source of silicic acid, and silica, traditionally associated with healthy hair and nails.

包含马尾提取物，一种天然的硅酸和硅石，传统上认为与头发和指甲健康有关。

It combines the organic sulfur of MSM and the silica of horsetail extract with key B vitamins to provide optimum nourishment for beauty maintenance.

它结合了有机硫MSM和二氧化矽的提取与马尾的关键 B族维生素，以提供最佳营养美容保养。

The thermal conductivity of the silica aerogels was determined using the transient hot-wire ...

结果表明：两种方法制备的气凝胶均是典型的纳米孔超级绝热材料，后者热导率略高但成本低许多，所以更具应用推广潜力。

The ordered mesoporous material MCM-41 was synthesized by a hydrothermal method using fumed silica,sodium hydroxide/tetraethyl ammonium hydroxide/hydrogen chlorideand cetyl trimethl ammonium bromide.

用X射线衍射、氮气吸附-脱附等手段对比分析了合成的3种MCM-41介孔材料的物相、比表面积、孔径、孔体积等，发现酸性介质中合成的介孔材料的孔径最大。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。