极性

Buna-N should not be used in highly polar solvents such as acetone and methyl ethyl ketone, nor should it be used in chlorinated hydrocarbons, ozone or nitro hydrocarbons.

Buna-N不能用于高极性溶剂，如丙酮和丁酮，也不能用于氯代烃类，臭氧或硝基烃类。

Its Nonlinearity holds at 160 degree C, it is one of the materials that have the best thermal stability. 3. polarization inversion films that consist of melamine formaldehyde resin and polymer/silica hybrid material were fabricated, a simulation model for calculating frequency doubling from multi-layer waveguides was established.

是迄今为止所发现的热稳定性最好的光学基质材料之一。3、利用密胺材料和聚合物/氧化硅复合材料最佳极化温度的差异，制备出重复性好、有较好热稳定性的极性翻转薄膜，并建立了多层波导结构光倍频计算模型。

Therefore, the EL spectra of (Znq_2)_4 is wider than that of Znq_2. 4._2 was synthesized. The analysis of molecular spatial structure and the characterization of material performance of_2 and Liq showed that two Liq molecules and two Naq molecules were connected by Na-O-Na bond bridges to form_2. Compared with Liq,_2 exhibits stronger rigidity in planar molecular structure, larger steric hindrance and intermolecular distance, and much smaller molecular polarity, thus resulting in much longer fluorescence lifetime, much higher fluorescence quantum efficiency, wider energy bandgap and better film formability. When used as light-emitting layer in OLED,_2 shows lower formation probability of excited dimmer and exciplex formation than Liq, thus emits bluer light with higher current efficiency than Liq. When_2 ultrathin film is used as electron injection layer in OLED, it exhibits higher current density, higher luminance, lower turn-on voltage and higher current efficiency than Liq ultrathin film for the existence of sodium ions in_2 ultrathin film. 5. The summarization the relationship between molecular spatial structure and material performance of Alq_3,(Znq_2) and Liq, lead the conclusion that the molecular spatial structure of Mq_n affects its material performance in such aspects as the rigidity of planar molecular structure, intermolecular interaction, molecule stacking mode and intermolecular distance.

制备了_2，通过对_2和Liq的分子空间结构与性能进行分析与讨论，发现_2是通过两个Na-O-Na键桥将两个Liq和两个Naq连接构成的，其分子平面结构的刚性程度强于Liq，空间位阻大于Liq，分子之间的距离大于Liq，分子极性远远小于Liq；_2的荧光寿命长于Liq，荧光量子效率高于Liq，成膜性优于Liq；_2的禁带宽度比Liq大，光致发光光谱中_2的最大发射峰较Liq发生蓝移；当_2在OLED中作为发光层时，激发二聚体与激基复合物的生成几率远远小于Liq，发的光比Liq更蓝，电流效率大于Liq；_2超薄膜中有Na离子的存在，与Liq超薄膜相比，当其在OLED中作为电子注入层时，具有更大的电流密度，更高的发光强度，更低的阈值电压和更高的电流效率 5、对上述Alq_3、Znq_2和Liq的分子空间结构与材料性能之间的关系进行了归纳总结，认为Mq_n的分子空间结构主要在分子平面结构的刚性程度，相邻分子之间的相互作用，分子堆叠的方式和分子之间的距离这四个方面影响其性能。

Oil solubilization for AES/benzene and AES/n-octanol was different because of the oil structural distinction. 2. Mesoscopic Simulation Study on the Aggregation Behavior between Lauryl Alcohol Polyoxyethylene and Sodium Lauryl Sulfate The MesoDyn method was used to study the interactions between lauryl alcohol polyoxyethylene (C12E10) and sodium Lauryl sulfate.

结果表明：由于极性头的结构差别，AES和SDS在临界胶束浓度和聚集数方面都有差异，同时两种表面活性剂之间又存在着较强的协同效应。

Formally,a control net without boundary is a polar net if it consists of extraordinary mesh nodes surrounded by triangles,and of quadrilaterals that have nodes of valence four.

正式地，没有界限的控制网是极性网，如果它包括三角围拢的非凡滤网结，有结化学价四的和四方形。

SF and collagen films were treated by negative corona discharge, homothermal surface potential decay was tested to detect the charge stability. Result showed circums- tance humidity influenced severely the surface charge stability. There were polar groups on the surface after corona discharge, and hydrogen bonds existed between these groups. On the other hand, ATR-FTIR analysis indicated the conformation transition of SF was induced by strong electric field and a part of random coil conformation was converted into β-sheet structure.

采用自制的负电晕极化装置对丝素、胶原膜进行了表面处理，等温表面电位衰减法测试材料在不同环境中表面电位的变化，发现环境湿度对材料表面电荷稳定性的影响较大；XPS光谱分析表明材料表面有极性基团产生，这些基团之间有可能会形成氢键，同时ATR-FTIR分析表明丝素的构象在强电场的作用下发生了变化，由无规线团转变为β折叠结构。

We found, on the one hand, urea can cause cytochrome cboth on the electrode surface and in the solution to be denatured and then the denaturedprotein lends to move the formal potential of the native protein in the bulk solution to amore negative value; and on the other hand, urea can also cause the formal potential ofnative protein in the bulk solution to shift positively with decreasing the degrees ofdissociation of electrolytes and polarity of the urea-water solvent.

我们发现脲能引起电极表面和溶液中的细胞色素C的变性，变性蛋白质能导致本体溶液中天然蛋白质的标准式电位的负移；另一方面，通过降低电解质的离解度和脲-水溶剂的极性，脲能使本体溶液中天然蛋白质的标准式电位正移。

One manner in which such extremes may be resolved is in the re-empowering of underpowered nations.

可以解决这些极性的一个方式，就是给那些没有力量的国家重新赋予力量。

We propose that nl1 locus function in maintaining the expression pattern of LjAS1a in normal Lotus compound leaf development.

因此在百脉根复叶发育中NLl位点的正常功能可能是维持LjASla的极性表达模式和表达水平。

We propose that NL1 locus function in maintaining theexpression pattern of LjAS1a in normal Lotus compound leaf development.

因此在百脉根复叶发育中NL1位点的正常功能可能是维持LjAS1a的极性表达模式和表达水平。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。