沉淀

Then, acid precipitation method and chilled alcohol precipitation method were applied to extract sericin.

采用酸析法和低温乙醇沉淀法对粗粉末中的丝胶进行提取，结果表明：低温乙醇沉淀法的提取率较高，采用体积分数为75%的乙醇溶液提取率达到64%。

Based on the preparation of silica in a rotating packed-bed reactor, an in-situ modification of silica is carried out by addition of silicane coupling agent during the final stage of carbonization reaction.

在超重力反应沉淀法制备白炭黑的基础上，在沉淀反应的后期加入硅烷偶联剂，实现沉淀法白炭黑的原位改性。

Based on the preparation of silica in a rotating packed-bed reactor, an in-situ modification of silica is carried out by addition of silicane coupling agent during the final stage of carbonization reaction.

摘要在超生力反应沉淀法制备白炭黑的基础上，在沉淀反应的后期加入矽烷偶联剂，实现沉淀法白炭黑的原位改性。

The cytoplasm of the tapetum cells of Zhenshan 97A deposited a few Ca(superscript 2+) precipitates at the pollen mother cell stage. At the meiosis stage, there were many large Ca(superscript 2+) precipitates at the inner longitudinal cell wall; there were a layer Ca(superscript 2+) precipitates around the tapetal cells.

珍汕97A绒毡层细胞从花粉母细胞时期开始，细胞质内有少量颗粒状的Ca(上标 2+)沉淀；减数分裂时期，绒毡层细胞的内切向壁表面有大量大颗粒的Ca(上标 2+)沉淀；单核花粉时期绒毡层细胞周围集聚一层Ca(上标 2+)沉淀。

Oxygen precipitation in CZ and GCZ silicon during the prolonged anneals at 800 ℃ and 1000℃ for up to 225 h was intensively investigated.

研究发现，Ge的掺入对氧沉淀有显著的促进作用，这种促进作用表现在对氧沉淀的量以及密度两方面的增加，并且TEM的观察证明了Ge的掺入对硅中氧沉淀的微观形态和尺寸都有所改变。

In the orthogonal designable experiment ,the analysis results of zirconium source, precipitation , the sulfating agent is 1.54%, 2.27%, 5.11%,respectively. This result show that the influence of sulfating agent to the catalytic activity is the biggest. Under the same density of the sulfuric acid soaks, the effect of sulfuric acid is well compared to ammonium sulfate .The second is the precipitation, but the influence of the zirconia source is the smallest.

正交设计实验中锆源、沉淀剂、硫酸化试剂的极差分析结果分别为1.54%，2.27%，5.11%，此结果说明硫酸化试剂对催化剂的影响最大，其次是沉淀剂，锆源的影响最小，同时表明以Zr(NO3)4·5H2O为锆源、乙胺为沉淀剂、硫酸为硫酸化试剂是催化剂的最佳制备方案。

In the second part, we discuss the mechanism and factors of deposit-tion forming. The factors are temperature, rate of titrating the sulphurc acid, rate of stiring, consistency of sulphuric acid and consistency of sodium hydroxide.

接下来本文探讨了沉淀的形成机理和沉淀形成时影响沉淀纯度的因素，并确定了碱减量废水中回收对苯二甲酸的影响因素为温度、加酸速度、搅拌、加入的酸浓度、废水的碱度。

The effects of magnetic seed, aluminum sulphate and pH value on phosphorus adsorption, precipitation and coagulation were surveyed. The results made it clear that Al ion as precipitant and coagulant was the main effect factor on P removal; as adsorbent magnetic seed had little effect on P removal, but made the phosphate precipitate sink faster; pH value had effect on both precipitation and adsorption.

研究了磁种、硫酸铝、pH值等对磷的吸附、沉淀、凝聚的影响，结果表明：铝离子的沉淀作用是除磷的主要原因；磁种的吸附作用对除磷的贡献较小，但使磷酸盐沉淀物的沉降性能大大提高；pH值既影响沉淀作用，也影响吸附作用。

The isothermal anneal at an elevated temperature of 1150℃ ramped up from a starting temperature （600-1000℃） was employed to enable the growth of the grown-in oxygen precipitates that are larger than the critical size at the starting temperature. Flourier transformation infrared spectroscopy and scanning infrared microscopy are used to measure the amount of precipitated oxygen and the oxygen precipitate density in a 300mm nitrogen-doped Czochralski silicon wafer, respectively.

文章摘要：采取从某一温度（600-1000℃）开始缓慢升温至高温（1150℃）并保温若干时间的方法，使得直拉si片中大于起始温度对应的氧沉淀临界尺寸的那一部分原生氧沉淀得以长大，然后通过傅里叶红外光谱测量氧浓度变化以及利用扫描红外显微术测量氧沉淀密度。

With increase of the precipitate volume fraction, the influence of the inter-particle diffusional interaction on the precipitate morphology and the composition will become stronger.

随着沉淀相体积分数的增大，沉淀颗粒间的扩散场相互作用加强，对其沉淀相组织形貌及其成分的影响也更加显著。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。