surface-active cation

The surface enhanced effect has been observed when the cation dye crystal violet was added to the silver sol. The signal of resonance scattering at 345 nm and 700 nm is enhanced greatly. The sensitive surface enhanced resonance scattering spectra was obtained.

当加入带正电的阳离子染料结晶紫后，产生表面增强效应，345nm和700nm处的共振散射信号大为增强，从而获得灵敏的表面增强共振散射光谱。

Many factors lead the clay mineral to swell and disperse, it is not only determined the composition and structure of glues on the mineral but also related to the factors of particle surface exchangeable cation ingredient, the dispersion medium nature and son on.

引起粘土矿物膨胀、分散的因素较多，除取决于组成粘上矿物的组分和结构外，还与颗粒表面交换阳离子成分、分散介质性质等有关。

When the cation from outside the cell membrane into the cell membrane, the membrane surface polarization in response to retire, so that channel open.

当这个阳离子从细胞膜外进入细胞膜内时，细胞膜表面则发生退极化反应，从而使通道开放。

( iii) a coordination bond, formed by ammonia atom with a surface cation ( Lewis acid site).

与催化剂表面的阳离子（即表面Lewis位）形成共价结构。

As compared to montmorillonite, the total surface area, micro-pore surface area and micro-pore volume of copper-loaded montmorillonite are reduced, while the cation exchange capacity, external surface area, pore volume and pore diameter are increased.

与蒙脱石相比，载铜后的蒙脱石总比表面积、微孔比表面积、微孔体积减少，而离子交换容量、外比表面积、孔体积和孔径增大。