氮化

The results of clinical assessment showed that levosimendan was safe and effective which could improve the prognosis of the patients and kept normal blood kinetics. By improving the reported synthetic route, levosimendan was synthesized from acetanilide via eight steps of reaction.

本论文探索了左西孟旦的合成路线，对文献报道的合成工艺进行了合理有效的改进，以乙酰苯胺为原料，最终经Friedel-Crafts反应，羰基α-位溴代，丙二酸二乙酯缩合，水解，脱羧，环合，拆分及重氮化加成等八步反应合成了左西孟旦。

And the lattice distance expands anomalously with decreasing particle size. Using the model of long-range interaction and its cooperative phenomena altered by particle size, the size-induced cubic-tetragonal phase transition, the anomalous lattice expansion, and the change in chemical bonding characters have been well understood.

采用长程相互作用的晶粒尺寸效应模型，对钛酸钡纳米晶结构相变、晶格间距异常增加、价键性质变化等实验现象给出了合理的统一的解释；并把该模型扩展到解释与钛酸钡晶体具有不同共价性成分的氮化镓等纳米体系的相变以及晶格结构变化现象。

Because the atomic lattice structure of gallium nitride is better matched to sapphire than it is to silicon, making LEDs on silicon without distortions has proved extremely tricky.

由于氮化镓的原子格栅结构能更好的与蓝宝石匹配，所以在硅片上不发生变形地制造发光二极管就特别难以把握。

The alternate stacking sequence of conducting and insulating layers blocks in t-BC3 crystal constructs a sandwichlike lattice at an atomic level; which will bring some potential applications expected for novel electronic devices.

设计了一种类金刚石结构导电的BC3超硬材料，预测t-BC3晶体的硬度为79.0 GPa，高于立方氮化硼的硬度；t-BC3晶体是一种具有原子级导体-绝缘体交叠的三明治结构的晶体；可望在新型电子学器件上获得应用

GPa exceeding that of cubic BN. The alternate stacking sequence of conducting and insulating layers blocks in t-BC〓 crystal constructs a sandwichlike lattice at an atomic level, which will bring some potential applications expected for novel electronic devices.

设计了一种类金刚石结构导电的BC〓超硬材料，预测t-BC〓晶体的硬度为79.0GPa，高于立方氮化硼的硬度。t-BC〓晶体是一种具有原子级导体-绝缘体交叠的三明治结构的晶体，可望在新型电子学器件上获得应用。

2B acid was diazotised and coupled with 2,3-acid, an anionic surfactant was added after 30 min., then laked with CaCl2 to give the title pigment.

2B酸重氮化与2，3酸偶合，30分钟后，填加阴离子表面活性剂，用氯化钙进行色淀化得标题颜料。

To investigate the wear mode of the silicon nitride balls in lapping process, a series of abrasion tests were carried out on a ball-plate wear test apparatus with different loads, abrasive girt diameter, and slurry concentrations.

为掌握不同研磨条件下氮化硅(Si3N4)陶瓷球表面的磨损形式，在球－盘式磨损实验装置上，采用不同载荷及磨料粒度和浓度的碳化硼(B4C)磨料进行了磨损实验。

The company specially produces screws and molten-rubber cylinders for homemade and imported 30-20000 gram plastic injection machines,15-300mm single screw extruders,30-130mm tapered and parallel double screw extruders rubber machinery,petroleum machinery,etc.using quality steel 38CrMoAlA,all products accord with the national standards after the treatment of structural improvement,nitriding,grinding, and polishing,.

本厂专业制造系列螺杆、熔胶筒产品适用于国产、进口的30-20000克注塑机，15-300mm单螺杆挤出机、30-130mm锥形，平行双螺杆挤出机及橡胶机械、化织机、石油机械等。采用优质钢材38CrM。 ALA，产品经过调质、定性、氮化、精磨、抛光等工艺精良制造，可达到国际级标准。

The results indicated that effect of silicon carbide or sodium silicate on inhibiting crystallization of fused quartz was not obvious,5wt% boric a.

以粒径。16mm的熔融石英颗粒为原料，以硼酸、碳化硅、氮化硅、水玻璃为晶化抑制剂，以聚乙烯醇(浓度1%)为结合剂，试样成型压强为20MPa，试样经1200℃保温2h烧成，对烧后试样进行1500℃保温1h的强化脱玻处理、RT～1300℃的差热分析以及RT-1300℃的热膨胀测定。

Seven type II UV absorbers of benzotriazol structure were prepared by diazotization,coupling,reduction and alkylation.Their structures were characterized by IR,MS and elem entary analysis.

通过重氮化、偶合、还原和烷基化反应合成了7个I型苯并三唑类紫外线吸收剂，并经红外光谱、质谱、元素分析等手段确证结构，其中6个为新化合物。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。