氢离子

The results have shown that P-RE-USY has good hydrothermal stability owing to the migration of hydroxy rare earth cation from the super cages to the sodalite cages enhanced by phosphorus addition, inhibiting the frame...

结果表明，由于磷促进了稀土离子由超笼向方钠石笼中的迁移，阻止了沸石在水热条件下的脱铝作用，从而改善了P RE USY沸石的水热稳定性；P RE USY沸石酸性分布更集中在中强酸范围，有利于发生氢转移反应，而强酸数量的降低有利于减少焦炭形成，改善了焦炭选择性。

Within this study, we found some interesting results, for example, the type of ring opening mode of methylene cyclopropyl ketones was changed from distal to proximal under the catalysis of palladium with the addition of two equivalents of sodium iodide.

我们发现了一个非常有趣的现象：亚甲基环丙烷基酮的开环方式可以得到有效的调控：在没有外加卤离子的情况下，开环方式为distal断裂，从而得到了4—氢吡喃化合物，而在两当量的碘化钠的存在下却发生了proximal断裂，从而能够得到2，4—双取代的呋喃。

Companies in strict accordance with American Petroleum Institute (AP1), American Society of Automotive Engineers, American Society for Testing and Materials, Japan Automobile Standards Organization classification criteria and the People's Republic of China home standards, Sinopec standard, the military standards and enterprise standards, the use of Exxon compound additive and imports of refined base oil dewaxing wide secondary hydrogenation treatment, it is technically feasible and widely Chevron USA, the British-run joint, DuPont, ExxonMobil and other companies to fully communicate using American spin magnetic ions and organic synthesis technology boron molybdenum additives for cutting-edge technology available in the market "in the stone fly" vehicle lubricants, industrial lubricants, engineering machinery oil, Grease, Ice-free fluid, brake fluid and other products with reasonable product mix, excellent quality assurance, accurate market positioning, establishing a good corporate image.

公司严格按照美国石油学会（AP1），美国汽车工程师学会，美国材料实验学会，日本汽车标准组织分类标准及中华人民共和国家标准，中石化标准，中国军工标准和企业标准，采用埃克森复合添加剂和进口精制基础油进行全脱腊二次加氢处理，在技术上广泛与美国雪佛龙，英润联，杜邦，埃克森美孚等公司充分交流合作，利用美国旋磁离子合成技术与有机硼钼添加剂的尖端技术为市场提供的"中石飞天"车用润滑油，工业润滑油，工程机械专用油，润滑脂，不冻液，制动液等系列产品，以合理的产品组合，优良的品质保证，准确的市场定位，树立了良好的企业形象。

The present research work focuses on two aspects. On one hand, the most successful alkaloid-derived ligands have been attached to a soluble or insoluble support covalently, but additional OsO〓 is necessary to maintain the consistent catalytic activity during the reuse of supported chiral ligand in the next AD reaction. On the other hand, immobilization of osmium tetroxide based on microencapsulation, ion-exchange techniques, and osmylation of resins has made it possible to recover and reuse of the osmium, but failed to recover the chiral ligand at the same time.

目前的研究主要集中在两个方面：一方面，将手性配体共价键合到不溶或可溶性载体上制成负载手性配体，但在重复使用负载配体时必须补充OsO〓，才能保证催化活性不降低；另一方面，将OsO〓包裹在高聚物微囊内，或运用离子交换技术或共价键合的方法将OsO〓固载在树脂、硅胶或层状双金属氢氧化物材料上，但手性配体却不能同时回收。

Such one-dimensional chains interconnect via hydrogen bonding and π-π interaction to form an extended undulated sheet-like structure.

经配体桥联的两个金属离子的距离是6.703〓。这样的一维链通过配体的NH部分〓Cl及溶剂分子甲醇相互之间形成的氢键连接扩展成二维波浪状结构。甲醇分子被包容在层间。

The hydrogen gas was evolved in the cathodic reaction region,and led to the evolution of uranyl ion hydrolysis.

在阴极反应区，由于氢的不断释放，导致铀酰离子在不锈钢电极上析出。

Methods Under the acid condition, fluorine could be separated by distillation, then fluorine is absorbed by washing liquid. The electricity lead detection-ion chromatogram with Ionpac AS14 column was employed to determine the content of fluoride, 3.5 mmol/L of sodium carbonate-1.0 mmol/L of soda as the washing liquid at 1.2 ml/ mm.

氟在酸性条件下，蒸馏分离，蒸出的氟化氢被淋洗液吸收，采用电导检测－离子色谱仪和IonpacAS14色谱柱，3.5 mmol/L碳酸钠－1.0 mml/L碳酸氢钠为淋洗液，流量为1.2 ml/min，样品及标准系列在酸性条件下经水蒸气蒸馏－吸收，直接进样测定。

A hydrogen sensor based on integrated optical waveguide structure is one of the most promising types of the field.

基于离子交换波导的集成型器件是氢敏传感器中很有发展潜力的一种。

When pH is 5 or so, molecules and ions of xanthate account for 50% respectively .While pH is above 5, the major effect is from ions, or from molecules.

离子的吸附作用是主要机制，在pH值较大时效果显著，但不能排除氢氧化物的沉淀作用。

The activity of superoxide dismutase in the myocardial cells was determined by the diphenol method, plasma malondialdehyde content was measured by TBA assay, the culture medium LDH content was measured by the acetonic acid method, the intracellular calcium concentration was measured by fluorescence spectropho- tometer- The results was shown that aspartate-K.

结果显示，门冬氨酸钾镁能减少阿霉素中毒心肌细胞乳酸脱氢酶的释放量，降低细胞内丙二醛含量及游离钙浓度，同时可升高细胞内超氧化物歧化酶活力；结果表明，门冬氨酸钾镁可能通过抗脂质过氧化及逆转细胞内钙离子过负荷作用进而保护中毒心肌细胞。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。