二价镍

According to AAS data, Fe, Ni and Mn in pits dissolved into ions in form of divalence, and Cr in form of trivalence both in the presence and absence of PD.

结果表明：304不锈钢蚀孔内，铬元素以三价，铁、镍和锰以二价离子形式溶解，缓蚀剂PD不改变各元素溶解的价态。

Time course of expression of hydrogenase activity showed that the derepression of hydrogenase activity depended on nickel.

除镍外其他二价金属离子如钼、铜、锌、钴、铁、镁、锰、钙等未发现对吸氢活性有促进作用。

On the NiO/SiO〓 catalyst prepared by IM, the main hydrogenation product of MA was SA, the activity and selectivity were almost no relation with the nickel content and nickel species 3. Summarizing the characterization and activity evaluation of the catalysts, we concluded: On nickel based catalyst, when NiO was crystallite, and the Ni〓 that was prepared by reducing, hydrogenation of the MA could lead to SA but not to γ-BL; when NiO was cluster and had a properly interaction with the support, the Ni〓 prepared by reducing, could hydrogenate MA to SA then to γ-BL. When NiO cluster and crystallite were both existed on the catalyst, the hydrogenation products were mixture of SA and γ-BL, and the amounts of SA and γ-BL were related with the ratio of cluster and crystallite.

综合催化剂的表征和活性评价得出：当镍基催化剂上氧化镍以结晶态存在，经氢还原后的零价镍可使顺丁烯二酸酐加氢得到丁二酸酐，丁二酸酐难以进一步加氢为γ-丁内酯；当镍基催化剂上氧化镍以簇团形式存在，与载体之间有适当的相互作用时，经氢还原后的零价镍可使顺丁烯二酸酐加氢得到的丁二酸酐进一步加氢为γ-丁内酯；若催化剂上氧化镍既有结晶态又有簇团形式时，随二者含量比例不同而得到丁二酸酐和γ-丁内酯的混合物。

After it was adjusted with ammonia until the test paper turned purple,in subacid medium of pH 6～7 ammonium acetate buffered solution,bivalent nickel was precipitated quantificationally by dimethylglyoxime.

试样以稀硝酸溶解高氯酸冒烟后，酒石酸掩蔽剂将铁等干扰元素配位掩蔽，以氨水调节至刚果红试纸呈紫色后，在pH6～7的乙酸铵缓冲溶液微酸性介质中，二价镍定量地被丁二酮肟沉淀。

Since xylenol orange interferes to determine some metal ions, such as iron, nickel, the author researched to determine them using EDTA.

6对二甲酚橙有封闭作用的金属离子如三价铁、镍，本文研究了用EDTA法测定它们的方法。

Pure inorganic ladderlike polyhydrosilsequioxane was prepared by the way of subsection hydrolysis.

第二部分超常价态过渡金属Ni引发接枝聚合的研究本论文第四章主要研究了利用二过碘酸合镍Ni为引发剂于碱性条件下在纤维素上接枝丙烯酸甲酯，接枝以后的共聚物显示了很好的热稳定性和抗潮性。

In this paper,the discussion is emphasized on the following process flowsheets in Chinese nickel metallurgy,such as the current smelting of low nickel matte with electric furnace and flash furnace concerting of high nickel matte with concterer separation of nickel from copper in grinding and flotation process anode electrolyting of nickel sulphide;two stage counter current ...

本文重点论述了我国镍冶金现有的电炉、闪速炉熔炼低冰镍－转炉吹炼高冰镍－铜镍磨浮分离－硫化镍阳极电解；高冰镍两段逆流硫酸选择性浸出－黑镍沉钴－电积；二次镍精矿制粒－沸腾焙烧生产氧化镍等工艺流程。同时，介绍了我国自行研究开发的高冰镍氯化精炼；焙烧－氨浸－氢还原；镍精矿微波脱硫－热等离子体熔炼高冰镍；大洋多金属结核常压氨浸和硫酸选择性浸出回收镍等有价金属的新工艺新技术。

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。