负电荷

In order to study the aldol condensation of 2.15-hexadecanedione on the surface of aluminium, the intermolecular condensation mechanism of acetone occurring on aluminum was simulated by using semi-empirical AM1 method embodied in MOPAC 6.0 program package. The optimized structures and geometry parameters of 5 transition complexes and 4 intermediates were given.First, 2 molecules of acetone coordinated with aluminum by electrostatic attraction.One atom of hydrogen of acetone migrated to aluminum because of t...

为了研究2，15－十六烷二酮在氧化铝表面的环合机理，选择小分子丙酮为模型化合物，用量子化学半经验AM1方法研究双分子丙酮在氧化铝表面的醛醇缩合机理，给出了反应过程中的5个过渡态和4个中间体的结构和几何参数，该催化反应可以认为是氧化铝分子与两分子丙酮分子发生静电络合作用，然后借助氧原子的负电荷导致脱氢并实现缩合，根据中间体的能量变化，推测有较稳定的铝复合物生成。

First, 2 molecules of acetone coordinatedwith aluminum by electrostatic attraction . One atom of hydrogen ofacetone migrated to aluminum because of the pulling of the negativeoxygen of aluminum, and then aldol condensation occured.

该催化反应可以认为是氧化铝分子与两分子丙酮分子发生静电络合作用，然后借助氧原子的负电荷导致脱氢并实现缩合。

Additionally, the nanodots were measured by EFM, and the experiment indicated that the charge of chromium oxide is negative.

此外，我们用静电力显微镜观察铬氧化点的静电荷分布情形，发现在铬氧化点内的静电荷为负电荷，并且随著铬氧化点高度的增加而变多。

Additionally, the nanodots were measured by EFM, and the experiment indicated that the charge of chromium oxide is negative. As the height of chromium oxide increases , negative charge of chromium oxide increases.

此外，我们用静电力显微镜观察铬氧化点的静电荷分布情形，发现在铬氧化点内的静电荷为负电荷，并且随著铬氧化点高度的增加而变多。

An atom of antihydrogen, for instance, is composed of a negatively-charged antiproton being orbited by a positively-charged positron.

举例来说，一个反氢原子，由带正电荷的正电子围绕带负电荷轨道运行的反质子组成。

Similarly the positively charged proton has a negatively charged antiparticle, the antiproton.

同样的，带正电荷的质子具有其带负电荷的反粒子—即反质子。

So adsorption of the cariogenic bacterium on the dental surface increased,incidence of the caries also possibly increasd.

口腔内带负电荷的致龋菌在牙齿表面的吸附增加，因而牙齿的龋患率可能也会相应增加。

In this manner, the negative charge hops downward from leader to leader like a frog jumping from lily pad to lily pad across a pond.

以这样的方式，负电荷向下跳跃，&先驱&一个接一个地就像是池塘中睡莲的叶子——一个搭着另一个。

In this manner, the negative charge hops downward from leader to leader like a frog jumping from lily pad to lily pad across a pond.

而负电荷就是以这样的先导区至先导区的方式，如同青蛙从一朵睡莲叶子跳至另一朵睡莲叶子越过池塘，到达地面。

In this manner, the negative charge hops downward from leader to leader like a frog jumping from lily pad to lily pad across a pond.

负电荷的这种跳跃方式就好像青蛙在睡莲上跳跃一样，从这个睡莲跳到另一个睡莲，从而跃过池塘。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。