电荷密度

Then, inhibition mechanism and the relations between inhibition efficiency and molecular structure of inhibition of carbon steel in chlorhydric acid by benzene nitriles and quaternary ammonium salts are studied from microscope through quantum chemistry calculation, and according to the results, theory predicting and proof testing of a benzene nitrile (2-benzo butyl nitrile) are made.

利用Hansch关系的研究结果表明，苯腈类化合物在盐酸溶液中对碳钢缓蚀的缓蚀效率，可用苯腈类化合物氰基氮原子的净电荷密度和分子最高占据轨道能量或分子最低空轨道能量构成的表达式表达。量子化学计算研究结果表明：1、苯腈类化合物在盐酸溶液中对碳钢缓蚀的缓蚀机理可能是：苯腈类化合物分子以其氰基氮原子上的电子提供给铁的3d空轨道，形成配位键；同时铁的3d轨道上的电子提供给苯腈类化合物分子的能量最低空轨道，形成&反馈键&。

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。

The bonding energy of a lateritic soil was chan...

作者根据实验材料认为，土壤体系中局部的电场强度较整个体系的平均体积电荷密度在决定离子的结合能方面具有更大意义；在 pH 低时，氢铝离子对交换点的竞争是钾、钠离子的结合能减小的一个重要原因。

It has been found that the cation exchange on diffusivity may play the role in different ways for different zeolites. When the diameter of the diffusant molecule is much smaller than the pore or cage size of the zeolite, the influence of exchanged cations is mainly by way of altering the electric field intensity (or the density of electric charge), the large the Z/r of the exchanged cations, the smaller the diffusivity; while the diameter of the molecule is apporsi- mately equal to the pore or channel size of the zeolite, the exchanged cations may affect the diffusivity by means of blocking up or narrowing the channels of the zeolite.

金属阳离子交换对扩散的影响表现为：当扩散分子的直径比分子筛孔道直径小得多时，交换阳离子以改变分子筛内部电场强度或电荷密度的方式影响扩散速度，阳离子的Z/r越大，扩散系数越小；当扩散分子直径与分子筛孔道直径相近时，交换阳离子则因堵塞或窄化孔道而改变分子的扩散速度。

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 light fastness of pyrazolone coupled acid azo dyes has the relationship with 5 independent factors:the NK N2 charge (E-N1 E-N2),the dipole moment,the frontier orbit energy. The equation revealing the relationship was founded.

以吡唑啉酮为偶合组份的偶氮型酸性染料在羊毛纤维上的光牢度主要与下述5个分子结构独立因素有关：N1、N2上的电荷密度（E-N1、E-N2，分子偶极矩（μ，前线轨道的能量Ehomo、Elumo），并建立线性关系式。

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 -300V and -500V electrets were applied on 3T3 cells for 24 and 48h, respectively, then the surface charge density on 3T3 cells and the intracellular free Ca2+ concentration and the number of apoptosis were measured by means of cell electrophoresis and flow cytometry method, respectively.

利用Fluo—3/AM Ca2+指示剂，采用流式细胞术测定3T3细胞内钙离子浓度的变化和3T3细胞的凋亡量，探讨驻极体诱导3T3细胞凋亡与细胞表面电荷密度和游离钙浓度变化之间的关系。

It includes the effects of π electron hopping between the alternate radicals and associated carbons on the bond order wave along the polyacetylene chain,the formation of charge density wave,and the effects of next-nearest-neighbor hoppings and electronic interactions.

其中包括侧链基团与主链的共轭性对主链键序波的作用，电荷密度波的形成，次近邻跃迁和电子相互作用的影响等。

A relative formula was nrived between the ionization equilibrium constant and the chnarge density on that oxygen of hydroxide radical, and then the pH values of the colour ranges of these indicators was calculated with satisfaction.

提出了此系列指示剂的电离平衡常数和羟基中氧上的电荷密度的关系式，计算了这类指示剂的变色pH范围。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。