沉淀剂

De Wit seeds with petrol ether,purified water and 95% ethanol was studied using test tube method.The chemical components of Leucaena leucocephala de Wit seeds were preliminarily demonstrated using precipitation reaction and color reaction of multiple indicators.

方法采用试管反应法，对银合欢种子的石油醚、水、95%乙醇提取物进行研究，通过多种指示剂和显色剂的沉淀反应或颜色反应，对银合欢种子可能含有的化学成分进行初步研究。

MethodsThe mixture was extracted from Leucaena leucocephala de Wit seeds with petrol ether,purified water and 95% ethanol was studied using test tube method.The chemical components of Leucaena leucocephala de Wit seeds were preliminarily demonstrated using precipitation reaction and color reaction of multiple indicators.

方法采用试管反应法，对银合欢种子的石油醚、水、95%乙醇提取物进行研究，通过多种指示剂和显色剂的沉淀反应或颜色反应，对银合欢种子可能含有的化学成分进行初步研究。

It could accelerate the protein sedimentation of malt extract,particularly remove the cold protein effectively and improve the turbidity of malt extract greatly, thus the nonbiological stability of beer could be improved.

麦汁澄清剂──卡拉胶能够加快麦汗中蛋白质沉淀，特别是除去冷浊蛋白质十分有效，大大改善麦汗的浊度，从而提高啤酒的非生物稳定性。

It could accelerate the protein sedimentation of malt extract,particularly remove effectively the cold protein and improve greatly the turbidity of malt extract,thus the nonbiological stability of beer could be improved.

主要论述麦汁澄清剂———卡拉胶能够加快麦汁中蛋白质沉淀，特别是除去冷浊蛋白质十分有效，大大改善麦汁的浊度，从而提高啤酒的非生物稳定性。

A kind of spherical microporous silica was synthesized by precipitation with the tetraethyl orthosilicate as a silica precursor and the block ploymer P_(123 as a template. The characterizations by the BET, FSEM and XRD showed that the spherical microporous silica has diameter of 3～4 μm, amorphous pore size of 0.9～1 nm and the specific area of 216±

以正硅酸乙酯作硅源，嵌段共聚物为模板剂，采用沉淀法合成均匀的实心球形二氧化硅微孔材料，BET、FSEM和XRD等表面分析手段表征表明，我们合成的二氧化硅微孔材料具有3～4μm的粒径和不规则分布的0.9～1nm的孔径以及216±3.5m2/g的比表面积。

College of Life Science,Hebei University, Baoding 071002,ChinaAbstract: The activesite of immobilized penicillin G acylase can be determined according to the precipitantproduced in the reaction between phenylacetic acid and capture reagent. Moreover, thelocalization of the immobilized penicillin G with different activity is done as well.

固定化青霉素G酰化酶活性的X射线微分析—活性定位姚子华黄永章仇满德王书香张贺迎武金霞潘延云周艳芬摘要：利用苯乙酸与捕捉剂反应天生的沉淀，确定固定化青霉素G酰化酶的催化活性部位。

In addition, the interaction between polysilicic acid and hydrolysis aluminum species in PASiS was discussed.

水处理实验结果表明，PASiS的絮凝效果优于PAC，PAS，PASC和PAM等絮凝剂，而又以共聚法制备的PASiS的絮凝效果更佳；不同碱化度、硅酸聚合度及铝硅摩尔比的PASiS表现出不同的絮凝性能，吸附架桥及捕获沉淀是其主要絮凝机理。

Compared with other flocculants, the polymeric ferric sulfate has much better performance and characteristics, such as better adsorption, bridge erection, flocculation, floc formate fast, not easy to breaking, better repolymerization and weak corrosion. So it was widely used in the wastewater purification and treatment which contains industrial wastewater, urban sewage, water for industrial use and potable water etc.

与其它的絮凝剂相比较，聚合硫酸铁不但具有较强的吸附、架桥、絮凝沉淀性能，而且在水处理过程中有生成絮体速度快、絮体不易破碎、重聚性能好、腐蚀性小等特点，因此广泛用于工业废水、城市污水、工业用水以及生活饮用水等的净化处理。

A functionalized superparamagnetic iron oxide nanoparticles were synthesized by reduction-precipitation method, and were modified by silicane coupling agent. The nanoparticles were evaluated by diffraction, scanning electron microscope and X-ray energy spectrometer.

用部分还原－共沉淀法制备了四氧化三铁Fe3O4纳米材料，用硅烷偶联剂进行了表面修饰，用扫描电镜，X-射线粉晶衍射，磁强计，X射线能谱仪等分析仪器对材料的相关性能进行了测定。

And the chemical constituents of Stachys geobombycis was primarily demonstrated according to precipitation reaction or color reaction with various indicator.

采用试管法和滤纸法，对地蚕的酸性EtOH，纯化水，MeOH提取物进行研究，通过多种指示剂和显色剂的沉淀反应或颜色反应，初步推断地蚕中可能含有的化学成分。

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。