离子交换

Ferritin from the liver of a salt water fish, Dasyatis akajei, herein called DALF, was isolated and purified by thermal denaturation, ammonium sulphate fractionation and ammonium reverse extraction, Sephacryl S-300 gel filtration and DEAE- cellulose anion exchange chromatography.

通过热变性处理、硫酸铵分级沉淀、排阻层析和离子交换层析等技术，分离纯化了魟鱼肝铁蛋白Liver ferritin of Dasyatis akaiei。

Our country needs every year to import the equipment that is inserts with ion exchange fiber in great quantities and analytic instrument from abroad, use at pharmacy, gas to consider detachedly, scientificly to wait for an industry.

我国每年需从国外进口大量以离子交换纤维为填充料的设备和分析仪器(为某一特定用途所准备的一套装置或机器)，用于制药、气体分离、科学研究等行业。

Ion exchange resin is a new type FRF processing technology, whose capacity is 7 times higher than diatomite and it can decompose phosphate.

离子交换树脂是最新的抗燃油处理技术，其处理酸的能力是硅藻土的7倍，并且对已经存在的磷酸金属盐有分解作用。

Objective To establish an ion-exchange HPLC method for the determination of content of pamidronate disodium for injection.

目的 建立离子交换高效液相色谱法测定帕米膦酸二钠的方法。

After electroreduction of ZME loaded Hg, metallic mercury particles are located on the internal and external surface of microporous system, the sizes of which are limited by the sizes of the zeolite cages.

分子筛离子交换点位上的Hg〓通过电还原成为Hg〓，在表面张力的作用下，Hg〓聚集成汞束定位在沸石分子筛孔系统的内表面和外表面，其汞束的聚集程度受分子筛尺寸的限制。

Further purification was performed on a column of Q-sepharose FF, and the 50mM elute contained the active DM650 with a purity of about 95%.

复性后的蛋白用Q-Sepharose FF离子交换层析进行纯化，50mM NaCl洗脱峰中含有目的蛋白，纯度可达95％。

Three strains of bacteria were isolated from haemolymph, hepatopancreas, ascites and muscle of the diseased Eriocheir sinensis caused by aeromonas. All of the three isolates were Gram-negative rods, motile by means of single polar flagella, and were facultatively anaerobic; Glucoce was catabolized with production of acid and gas; Oxidase was positive.

利用硫酸铵盐析、Sephadex G-100凝胶层析和DEAE-Cellulose离子交换柱层析等方法，从其胞外产物中分离纯化出了2种胞外蛋白酶，用SDS-PAGE电泳测得两种蛋白酶的分子量分别为39.6kD和20kD.39.6kD蛋白酶活性在50℃～60℃范围内热稳定性最好，最适pH为9，而20kD蛋白酶的最适温度为50℃，最适pH为8。

Modified sepiolite is a kind of fibriform clay mineral with abount of magnesium, it has the advantages of stronger adsorption, larager ion capacity for its special samdwich structure, causing less repollution, and can be reused, so it will be widely used in pollution control.

改性海泡石是一种纤维状富镁粘土矿物，其独特的层状结构和巨大的比表面使其具有吸附性强、离子交换能力大的特点，且具有二次污染小、可重复使用的优点，因此在污染治理方面的应用较为广泛。

The origin of glauberite attributes to various processes, including(1) direct crysllization from sulphate solution;(2) substitution of glauberite for gypsum;(3) transformation from hydrous glauberite; and(4) ion exchange between sodium sulfate and calcium-bearing mud.

钙芒硝的成因可归纳为：(1)直接从硫酸盐溶液晶出；(2)交代石膏成因；(3)从卤水中先沉积水钙芒硝后脱水变为钙芒硝；(4)硫酸钠溶液与含钙淤泥之间发生离子交换而生成。与菱镁矿紧密共生产出于海相地层之钙芒硝很可能形成于潮坪盐湖环境。

Synthesis methods of bisphenols catalyzed by sulfuric acid, ion exchange resin IER and heteropoly acid were studied in this thesis.

本文研究了硫酸、离子交换树脂和杂多酸用作催化剂合成双酚的方法。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。