沉淀剂

Methods: from prepation of crude drug as start, study the technology of extract and defat with L9 (3~4) orthogonal test. With EtOH extraction and water sed, alkali washing, EtOAC extraction as main methods of eliminate dopant. Finally with alky AlzO3 chromatographic column, rich and gain anticancer active site. The maximum response was achieved at a 40 min extracting time with 10 times volume 90% EtOH added to the sample for the first time and 30 min for the second time. Adding 10 times water will produce precipitation; Place the precipitation into 6 times petroleum benzin to de-fat at 60℃.

云南红豆杉中抗癌活性物制备工艺研究方法：利用正交设计试验L9(3~4)确定原料药提取工艺为：10倍量90％乙醇提取两次，第一次40分钟，第二次30分钟；醇提液用10倍量水沉；沉淀加6倍量石油醚40℃脱脂；用1mol／L的NaOH溶液碱洗，除去酸性杂质；以碱性氧化铝柱，以环己烷／丙酮为洗脱溶剂，在环己烷-丙酮(6：4)段富集到所需活性部位，洗脱剂用量为3VB。

Spent solutions were finally drained into a mixing trough forneutralization, and subsequently, calcium or barium hydroxide and flocculant were added. Precipitate producedsuch as calcium or barium sulfate, calcium fluoride were separated, and recovered water was obtained after pu-rified by ion-exchange column.

分析了铝合金生产工艺中各步骤的化学成分，根据分析结果将常温脱脂、碱蚀、出光、阳极氧化和封孔等不满足生产要求的溶液排放至混合槽内进行中和，再加入氢氧化钠和絮凝剂分离沉淀后，经离子交换柱，得到的回收水可返回生产槽重复使用。

The effects of the composition of catalyst (the structure and amount of bident ligand and strong acid, the cocatalytic activity of Cu〓, the roles of methanol and phenol etc.) and the copolymerization condition (the reaction time, temperature, amount of ST and CO, the structure and amount of dilution reagent etc.) on catalytic activity were studied in detail. Also the optimum copolymerization condition was chosen.

深入考察了催化体系组成（含氮双齿配体的结构与用量、强酸的结构与用量、铜盐的助催化作用、醇类与酚类化合物的作用等）和沉淀共聚反应条件（共聚反应的温度与时间、稀释剂结构与用量、苯乙烯与一氧化碳量等）对该共聚反应的催化活性的影响，优化共聚反应的聚合条件。

Brownian movement and the hydraulic condition required is only that the coagulant can be dispersed in the water rapidly;As the floc is growing further,the condition of making the floc diameters controlled in a certain limit is to be provided as well as the condition favorable for the collision of the floc.

得到细小粒子的凝集动力由布朗运动决定，此阶段只需要有将混凝剂迅速分散于水中的水力条件；在絮体进一步成长过程中除造成有利于絮体碰撞的水力条件外，还要造成絮体粒径控制在某一限度之内的水力条件，这样可以得到密度高、沉淀效果好的絮体。

With only 2% chromium powder, the nano-composite tanning agent can thicken the leather by 124.5%, the shrinkage temperature reaches to 95 DEG C.; compared with a chrome tanned leather, a leather tanned by the nano-composite tanning agent has a tensile strength, peeling strength and elongation at break improved by 51.8%, 8.2% and 13.3% respectively, has no obvious stratification or sedimentation during over 12 months of storage period.

所述复合鞣剂只需配入2％的铬粉，就可使皮革增厚高达124.5％，收缩温度达到95℃以上；其鞣革相较于铬鞣革，革的抗张、撕裂强度分别提高了51.8％和8.2％，断裂伸长率也提高了13.3％，存放期12个月以上无明显分层和沉淀。

As for the sulfide precipitation-coagulation, the function of coagulator is proved by both sweep-floe coagulation and charge neutralization.

硫化沉淀-混凝联用法中混凝剂的作用机理为卷扫絮凝和电性中和。

The flame retardant type magnesium hydroxide has been prepared with brine,halide,and magnesium chloride hexahydrate as raw materials by two-step process i.

以卤水、卤块和六水氯化镁为原料，采用两步法即氨水沉淀-水热处理过程制备出氢氧化镁阻燃剂。

The effects and performances of dephosphorization of the common coagulant and the flocculants: the calcium salt, the molysite and the aluminum salt and polyacrylic amide were studied on the post-positioned precipitation of municipal sewage which was processed through biological treatment.

本实验以常用混凝剂及絮凝剂：钙盐、铁盐和铝盐及聚丙烯酰胺为研究对象，研究它们对经生物处理后的城市生活污水出水，进行后置沉淀除磷的性能及除磷效果。

Based on the precipitation reaction principle of defluorination in wet-process phosphoric acid production,sodium carbonate and diatomite have been experimented to defluorine from phosphoric acid with different conditions.

基于湿法磷酸沉淀法脱氟工艺的反应原理，以碳酸钠为脱氟剂，硅藻土为助脱氟剂，研究了不同的碳酸钠和硅藻土用量、作用时间、作用温度条件下的脱氟效果。

In most cases, the medical profession do not advocate drug use of tea, in particular, ferrous sulfate, ferrous carbonate, iron citrate iron drink containing amine such as aluminum hydroxide of aluminum-containing agents, such as the western face of tea tea and more phenolic material and metal ion binding and precipitation, will be reduced or loss of efficacy.

在多数情况下，医学界不主张用茶水服药，尤其是硫酸亚铁、碳酸亚铁、枸橼酸铁胺等含铁剂喝氢氧化铝等含铝剂的西药，遇到茶汤中的茶多酚类物质与金属离子结合而沉淀，会降低或失去药效。

What would he tell Judith and the children?

他将怎样告诉朱迪丝和孩子们呢？

I this is at that time, the opinion with peacockish true girl is full of in a heart.

这就是当时的我，一个心中布满虚荣的女孩子真实的想法。