查询词典 SN

To achieve this purpose, the authors have investigated the current technological conditions in delead and dearsenic processing and made detailed analysis of alkalescency solution laden with arsenic and lead content as well as the influential factors involved.

实验结果表明，经脱砷和脱铅后，Sb以锑精矿形式产出，可作为炼锑的原料；Pb以 Pb Cl2 或铅渣形式、Sn以锡渣形式产出，其品位较高，可作 Pb或 Sn冶金的原料；该工艺具有化工试剂消耗少、综合利用率高、污染小、易于实现大规模工业化等优

A hyperbolic sine relationship can satisfactorily correlate strain rate with flow stress by introducing an Arrhenius term which involves thermal activation parameters, i.

探求了Al-Sn-Si合金的高温变形流变特征及其软化机制，指出了Sn造成的晶间粘滞性流动的变形机制，建立了热变形稳态流变应力方程式。

Then M is a hypersurface of a (n +1)-dimensional totally geodesic submanifold Sn+1 of Sn+p .

则M是S~的一个(n+1)-维全测地子流形S~(n+1)中的超曲面。

The crystal belongs to monoiclinic with space group P2 1/n, a=1.7073(7)nm, b=1.7447(7)nm, c=2.4333(10)nm,β=109.694(7)°, Z=4,V=6.824(5)nm 3, D x=1.282g/cm 3,μ=0.793mm -1, F(000)=2696, R 1=0.0563, WR 2=0.1539. In the crystals of compound, the tin atoms rendered seven-coordinate in a distorted pengonal bipyramidal structure.

我们以 NEt3 作缚酸剂，用 Ph3 Sn Cl与 2 ，6 -吡啶二甲酸以 1∶ 1摩尔比反应时，没有得到预期产物 Ph3 Sn O2 C(2 ，6 - Py)CO2 H ，而是得到一种 Sn- Ph键断裂的离子型有机锡化合物(Scheme1 )。

Finally, the properties of the drug-loaded SN have been evaluated with the help of UV spectrophotometer, and with the small molecular and water insoluble drug-sulpiride as a model drug. It is found that the entrapping efficiency of drug-loaded SN in entrapping method can amount to 96.87% and that in adsorption method is 87.63%, which show that the loading mechanism of SN is mainly adsorptive mechanism.

最后，利用紫外分光光度计，以疏水性小分子药物舒必利为模型药物，对所制备的淀粉纳米粒的载药性能进行了评价，发现淀粉纳米粒包埋载药的包封率可达到96.87％，吸附载药的包封率达到87.63％，淀粉纳米粒对舒必利的载药机理主要是吸附机理。

Then, lithium ions reacted with Sn to form Li-Sn alloy. In charge process, lithium ions extracted from Li-Sn alloy.

由球磨SnS的电化学性能比较得出：随着球磨时间的增加，放电容量增大，循环性能越好。

ABSTRACT in the first part of this thesis, the interaction between cu-sn and ni-sn interfacial reactions in a soldering system has been studied by using a ni-sn3.5ag-cu sandwich structure. a layer of cu-sn intermetallic compound was observed at the interface of the ni foil after 30 seconds reflowing.

在电子元件高功率及及轻、薄、短、小化的要求下，热一直是造成电子元件失效的原因之一，BGA封装的主要失效原因是作为接点的锡铅共熔合金（63Sn-37Pb；或称锡球）的疲劳破裂，这是导因於封装体不同材料间热膨胀系数的差异所造成的热应变。

So it is very important to start the study in the field of measurement of nuclear data for the long-lived nuclides.

在~(126)Sn~(127)Sn~g和~(127)Sn~m热中子反应截面测量研究中，主要开展了以下五方面的工作：(1)试剂中杂质检验及试剂纯化。

Monophenyltin trichloride reacts withdicarbonyl dicyclopentadienyl titanium immediately at room temperature, but no ti-tanium-tin complex produced, and the products were diphenyltin dichloride〓 and tin or stannous Chloride. When diaryltin dihalides were used, only the chlorides and bromides reacted with 〓form the complexes containing titaninm-tin bond,〓. but the corresponding iodide complex was not found. This reaction is Sensitive totemperature,when the temperature is belw 10℃,the reaction hardly takes place,but as the temperature is above 25℃,more 〓 will be found and the reactionbecome more complex.

Ph-SnC〓室温下即可与Cp〓迅速反应，但不生成含钛一锡链的化合物，而是生成Ph〓和Sn或Sn〓二芳基二卤化锡化物中，只有氯化物和溴化物才能和〓反应生成含钛〓锡键的化合物〓相应的碘化物则不行，而且反应对温度比较敏感，低于10℃，反应几乎不能进行，而高于25〓，则会生成更多的〓，在回流条件下得不到含钛〓锡键的化合物，只能得到分解产物，〓和Sn或〓。

Starch nanoparticles have been prepared with W/O starch microemulsion as microreader and epichlorohydrin as cross-linking agent. The factors affecting the preparation of SN have been investigated via the characterization of TEM. The results show that the size and size distribution of SN are mainly controlled by the interfacial strength of microreactor, and the interfacial strength of microreactor is chiefly influenced by W value (the molar ratio of water / surfactant) and concentration of starch. The SN with controllable size and size distribution can be obtained by adjusting preparation parameters.

利用所得到的W／O型淀粉微乳液作为微型反应器，以环氧氯丙烷为交联剂制备出淀粉纳米粒，并借助透射电镜的表征研究了各制备因素的影响，研究结果表明：淀粉纳米粒的粒径及粒度分布主要受微型反应器的界面强度控制，而影响界面强度的因素主要是R值(即水与表面活性剂的摩尔比值)及淀粉液浓度。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。