查询词典 charge density

It is also found that the value of maximum energy conversion efficiency depends on the values of κa and surface charge density.

此外，最大能量转换效率随κa改变时，可发现一极值，此极值之大小，及κa值发生处，随壁面电荷密度之增加而增加。

An organic cationic flocculant containing quaternary ammonium ion was synthesized using epichlorohydrin, diethylamine and 1, 2-diaminoethane as raw materials. The intrinsic viscosity, charge density and turbidity removal rate of PEFD were determined and its structure was characterized by FT-IR.

以环氧氯丙烷、二乙胺和乙二胺为原料合成了有机阳离子絮凝剂PEFD，对其电荷密度、特性粘度以及絮凝性能进行了测试，并采用红外光谱对其结构进行了表征。

Nontronite modified copper-plated electrodes possess the largest reductive currents of paraquat due to their larger charge density and electronic transferability of octahedral iron. Overall, based on this study, clay modified copper-plated electrodes show high potential in future research for determining biochemical compounds.

黏粒修饰镀铜电极对巴拉刈的侦测结果显示三种黏土矿物仍以具有较高电荷密度及八面体层中铁的电子传导之多铁蒙特石所测到的还原电流量最大，黏粒修饰镀铜电极未来在生化物质的侦测上应具有研究发展的潜力。

The paper interprets alternant polarization phenomen on of even alternant hydrocarbons by discussing charge density on every position of even alternate when it is polarized using perturbational molecular orbitals.

文摘：本文用微扰分子轨道法讨论了偶交替烃被极化时各位置上的π电荷密度，解释了偶交替烃π电荷的交替极化现象。

The structure layer turns from TOa type to TOaT type (balanced by interlamellar cations), then to TOaT type for kaolinite, illite and pyrophyllite, respectively; alumina to silica mass ratio turns from 0.86 to 0.42; the surface zeta potentials turn small, but they show little relation with their surface charge density.

通过红外光谱分析可知，十二胺和油酸钠在一水硬铝石、高岭石、伊利石和叶蜡石表面的吸附主要以静电力作用的物理吸附为主，与矿物的表面电性有关。

ABSTRACT Power electronics devices are developed rapidly. There are some factors which influence the protective properties of the devices, including such as electrical characteristics of protection materials, the interface conditions of protective materials-pn junction, the surface effective charge density, the polarizable or unpolarizable properties of organic protective materials, etc.

电力半导体器件是近期发展起来的一类功率电子器件，其表面保护与其它电气元件不同，一方面要考虑器件表面绝缘保护材料的电性能和含杂等因素；另一方面，器件的表面钝化保护材料与器件接触后，器件的界面情况、材料与器件接触带电情况、以及材料所含官能团的极性等情况，也是影响器件性能的主要因素。

The structures of the intercalates formed by reaction of four guests with Zn, Al-HTlc were characterized by XRD and IR techniques. And the charge density on the oxygens of each of the carboxylate groups for each of the four anions was investigated utilizing ab initio (HF/6-31G) method by G98w. The orientation of 1,2-,1,3-,1,4-benzenedicarboxylate or benzenecarboxylate anions between the layers was also proposed.

利用XRD和IR测试技术对样品结构进行表征，UV及HPLC对有机酸的反应量进行定量，并采用Gaussian-98软件包中ab initio分子轨道法(HF/6-31G)计算了各有机酸阴离子的分子结构，分析了其结构与插层行为的关系，并理论结合实验给出了各有机酸阴离子在锌铝类水滑石层间可能的空间构型。

Secondly, effects on the structure and topographies of self-assembled enzyme films of assembling conditions that were substrates with different charge density, assembling time, pH value and concentration of enzyme solution, were studied.

其次探讨酶自组装过程中酶溶液的浓度、pH值、组装时间以及基材的电荷密度等因素对酶/PET-CO〓自组装膜的表面形态结构与特性的影响。

The material properties that have the greatest impact on the high-speed performance of HEMTS are the high sheet charge density in the two-dimensional electron gas (2DEG) and the superior electron velocity.

在这篇报告中，我们将要报告高电子迁移率电晶体发展历程与结构特性，应用在小讯号等效电路模型的建立上。

Their piezoelectric responses are investigated by means of decay measurement of isothermal piezoelectric coefficient and charge density.

借助准静态压电系数测量，研究了制备工艺对复合膜压电活性的影响。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。