离子交换

The 3propanesulphonic acid was separated by cationic exchange resin,and its content was determined with electrometric titration .

先用离子交换树脂处理合成3-丙基磺酸的反应液，再用电位滴定法准确定量产物MOPS。

It is also used for regeneration of ion exchange resin, cleanser for electroplate and metal surface.

还用于离子交换树脂的再生以及电镀、金属表面的清洗剂。

The method of ferricyanide elution was explored.This paper aims to provide foundation of theory and technology for industry application.

研究了声场强化对离子交换纤维吸附性能的影响，探索了铁氰络合物解吸的途径，旨在为工业应用提供理论和技术支撑。

Acetone extractives in masson pinegroundwood pulp were isolated and analyzed through the employment of DEAE-Sephadex ion exchange chromatography and GC/MS.

利用DEAE－Sephadex离子交换色谱和气相色谱－质谱联用技术，对马尾松磨木浆丙酮抽出物的化学成分进行了分离及分析。

Combining ion exchange process and silicon hydrolyze process Silicon dioxide mother nuclide with a specific particle size was prepared from sodium silicate through the dropwise technique , then the large particle size , high concentration and stable silica sol was prepared . The stability of silica sol also can be improved by enwrap .

和"单质硅一步溶解法"相结合的方法，用离子交换法制备晶种，并采用滴加工艺制备一定粒径大小的二氧化硅作为母核，在催化剂和分散剂共同作用下水解单质硅的方法使二氧化硅母核颗粒进一步增长成大粒径的二氧化硅颗粒，并另外还采用水溶性高分子对纳米SiO_2粒子进行"原位表面包覆"提高其稳定性，制备了大粒径，高浓度，稳定的纳米硅溶胶。

Based on the recent trends, research advances of sulfonic acid resin, zeolite, heteropolyacid is reviewed, and the effect of zeolites structure, acid density, acid strength on etherification property is discussed in this paper.

针对近期的发展动态，着重综述了大孔磺酸型离子交换树脂、分子筛、杂多酸等新型醚化催化剂的研究进展，详细讨论了分子筛催化剂的结构、酸密度、酸强度对醚化性能的影响。

METHODS Using a combination of cryoglobulin precipitation,euglobulin precipitation, ion-exchange chromatography,(NH4)2SO4 precipitation and affinity chromatography, the impurity protein of different quality was removed, and the easy and effective condition was selected toincrease the purity and content of C2 in the final product.

方法利用冷球蛋白沉淀、优球蛋白沉淀、离子交换色谱、硫酸铵沉淀和亲和色谱几种方法，将血清中不同性质的杂蛋白除去，选择相对简单且分离效果好的条件，提高终产物中目标蛋白C2的纯度和含量。

Commonly used products: Brass wire, including zinc line, polishing lines, filters, ion exchange resins, conductive block, wire mold, insulation board, guide pulley, bearings, water spray nozzles, descaling agent K200, KC12, eye discharge mode discharge brass, discharge chucks, belts as well as a strong magnet, clamp, charge plates, screws, etc. have the cash, and other great products: Tension brushless motor, sets up nose snakes belly, auxiliary sprinkler head, cluster-type sprinkler head Block, Block, and the mother spray, sprinkler head connected·, sprinkler head covered by panels, round round of vice-axis spindle, folder line wheels, power wheels, flow meter, electric plate fixed to the pad, round round, wire wheels, gears, axle win hearts catheter, vertical meter cable, pole lines, grounding line, guide line wheels, micro switch, on the nose, eyes mold base, the wheel seat, rectifier ring, nose mounting insulation, automatic threading catheters, eye mold base assembly, pressure gauge and chuck ER group, eyes fixed mold plate and so have the cash or stock.

常用产品：黄铜线、包锌线、抛光线、过滤器、离子交换树脂、导电块、导丝模、绝缘板、导轮、轴承、喷水嘴、除锈剂K200、KC12、放电眼模、放电铜管、放电夹头、皮带以及强力磁石、夹具、押板、螺丝等均有现货，其他非常用产品：张力马达碳刷、上机头蛇腹套、辅助喷水头、子母型喷水头喷座和母座、喷水头连接铜环、喷水头盖板、出线轮主轴副轴、夹线轮、强力轮、流量计、给电板固定垫、出线轮、引线轮、齿轮、出线轮轴心、导管、垂直度计连接线、极间线、接地线、引导线轮、微动开关、上机头、眼模座、滚轮座、整流环、机头绝缘固定座、、自动穿线导管、眼模座总成、压力表以及ER夹头组、眼模固定板等有现货或备货。

It was found that TPS4-1 was a polysaccharide-protein-nucleic acid conjugate by using the methods of UV, IR, NMR, HLPC, GC, gelose electrophoresis, periodate oxidation, smith degradation.

通过吸附柱层析、离子交换柱层析和葡聚糖凝胶柱层析等多级层析纯化的方法获得了茶多糖的相对均一组分TPS4-1。

In this paper we combined three chromatographic separation and purification technique such as affinity chromatography, ion exchanger chromatography and hydrophobic interaction chromatography to develope a new technology of stimutaneous extraction of three enzyme from pancreatin. We optimized the technology by studying the methods of purification and assured the technology as: The crude extraction from the dissolution of Pancreatin is directly absorbed on the DEAE gelose fast flow columnEquilibrating buffer is 0.01mol/L NaoAc-HoAc buffer(pH4.5; eluting buffer is 0.2～0.35mol/LNaCl in 0.01mol/LNaoAc-HoAc buffer (pH4.5), and then be eluted by two steps to acquire the peak of kallikrein.The solution which can"t be adsorbed by DEAE gelose fast flow column is adsorbed on affinity chromatographic column Equilibrating buffer is 0.01mol/LTris-HCl buffer(pH7.5, eluting buffer is 0.5mol/LNaCl in 0.01mol/Ltris-HCl buffer(pH7.5)and then be eluted by one step to acquire the peak of trypsin.The solution which can"t be adsorbed by is pretreated with 30%～80%(NH_4)_2SO_4 fractional precipitation, the deposition of the precipitation is dissolved to beabsorbed on phenyl gelose fast flow columnhydrophobic interaction chromatography condition is Equilibrating buffer is lmol/L(NH_4_2SO_4 in 0.01mol/LNaoAc-HoAc buffer(pH4.5), eluting buffer is 0～0.6mol/L(NH_4)_2SO_4 in 0.01mol/LNaoAc-HoAc buffer (pH4.5) and then be eluted by two steps to acquire the peak of chymotrypsin.

本研究考察了各种纯化方法，将离子交换层析、亲和层析和疏水层析三种分离纯化法相结合，建立了激肽释放酶、胰蛋白酶和糜蛋白酶三酶的联产工艺：胰酶用pH4.5醋酸缓冲溶液提取后，粗提液直接上DEAE-琼脂糖快胶柱吸附平衡缓冲液：0.01mol／LNaoAc-HoAc缓冲液(pH4.5，洗脱缓冲液：0.01mol／LNaoAc-HoAc缓冲液(pH4.5)含0.2～0.35mol／LNaCl分两步洗脱，收集激肽释放酶的洗脱峰；DEAE-琼脂糖快胶的未吸附液上亲和层析柱分批吸附平衡缓冲液：0.01mol／LTris-HCl缓冲液(pH7.5，洗脱液：0.5mol／LNaCl溶液，一次洗脱，收集胰蛋白酶洗脱峰；最后，亲和层析未吸附液用30％～80％硫酸铵分级盐析处理，沉淀溶解后用上苯基—琼脂糖快胶吸附平衡缓冲液：0.01mol／LNaAc-HAc缓冲液(pH4.5含1mol／L(NH_4)_2SO_4，洗脱缓冲液：0.01mol／LNaAc-HAc缓冲液(pH4.5)含0～0.6mol／L(NH_4)_2SO_4，分两步洗脱，收集糜蛋白酶的洗脱峰。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐