离子结合

Cyclodextrin linked to the guanidine causes more positive charge localizing at the central Cu cation of {[Cu (H2O)]2}(superscript 3+), which is favorable to catalyze the dismutation reaction.

与其它配位原子相比，与两个五元环连接的N原子与Cu配位能力相对下降，这也将有利于提高Cu离子与底物的结合能力。

Cyclodextrin linked to the guanidine causes more positive charge localizing at the central Cu cation of {[Cu(H2O)]2}3+, which is favorable to catalyze the dismutation reaction.

与其它配位原子相比，与两个五元环连接的N原子与Cu配位能力相对下降，这也将有利于提高Cu离子与底物的结合能力。

Advanced electrodeionization combines features of ion exchange and membrane-based electrodialysis into an energy efficient process for removing dissolved salts.

先进的电镀消电离作用结合在具能源效益的过程中起消除作用的离子交换和膜基电渗析的特点来溶解盐类。

Electrokinetics can enhance the mass-transfer process, thus remove the heavy metal to a given direction fast and efficiently; meanwhile electrokinetics can combine other remediation technology, thus possessing broad application foreground.

电动技术能够强化土壤物质的传质过程，能够高效、快速定向迁移土壤中重金属离子达到去除的目的；同时电动技术可以与其它修复技术结合发展出系列组合修复技术，具有广泛的应用前景。

Milk fiber.The influence of pH value,dyeing temperature and neutral electrolytes on percent exhaustion were studied.The dyeing rates and buildingup properties of these dyes were also discussed.The effect of pH value was prominent on percent exhaustion,showing that the electrovalent bond between the dyes and the casein component of the fiber played an important role in the uptake of dyes.The ...

染液pH值、染色温度、元明粉等对上染率的影响，以及这两类染料在牛奶丝上的染色速度和提升性能的研究表明，牛奶丝染色受pH值影响很大，说明染料与酪素蛋白之间的离子键结合对染料上染起重要作用；元明粉在各pH值下对上染率的影响显示，牛奶丝的等电点约为4；酸性染料对牛奶丝的初染率高、初染速度快，但80℃恒温下的上染速度却慢于蚕丝和羊绒；牛奶丝染色对pH值的敏感性大于蚕丝和羊绒，且其酸性染料上的提升力较蚕丝和羊绒差。

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。

A warning signal from the system which indicates high EC or EC ratio of a dairy cow is used to inform the milker to pay attention to the suspected cow. The detection thresholds of EC and ECR to determine whether a quarter or a dairy cow is infected with mastitis correspond with the criterion of SCC = 500×103 cells/ml for quarter foremilk of a dairy cow. The performance of online system for mastitis detection in dairy cows is evaluated with several methods, such as the detection thresholds, running analysis and discrimination analysis.

以分房乳 SCC 500 × 103 cells/ml 作为乳房炎感染与否的门槛值，由牛旁采样分房乳样的检测与分析，探讨影响牛乳 EC 大小的相关因素及其关系，如分房乳中的氯离子浓度、挤乳时间、挤乳前后及乳成份，利用变异数分析探究未感染与感染乳房炎的分房乳之间，其 EC 及 ECR 物理性质，SCC、乳酸去氢酵素及 pH 化学性质及乳脂率、蛋白质及乳糖等乳成份的差异，进而利用统计鉴别分析探讨 EC 相关参数结合乳成份参数对乳房炎检测的准确度。

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。

Nicotianamine synthase gene has an important function in the Fe-deficiency response of graminaceous monocots, and it catalyzes substance to nicotianamine which plays an important carrier in the internal transport of Fe(superscript 2+) and other divalent metal ions. Nicotianamine can bind with Fe(superscript 2+) to form Fe(superscript 2+)-NA complex and protect plants from toxicity in acidic soil.

烟酰胺合成酶基因在单子叶禾本科的缺铁胁迫应答反应中起着关键作用，它的催化产物烟酰胺是铁及其他二价金属离子在体内吸收和转运的重要载体，且能与Fe(上标 2+)结合形成Fe(上标 2+)-NA复合物，从而使植物在酸性土壤中免受铁毒害。

The formation of polyhalide depends on the combination of central halide ions.

多卤化物的形成取决于中心卤化物离子的结合。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。