铬

The results of calculation will be fundmentally consistent with the experimental values.In addition, we calculated dibenzene chromium and its derivatives, ferroceneand its derivatives. The former had higher symmetry. We studied the substituenteffects by calculating their NMR spectra. The results show that: when we add asubstitute group on one ring of dibenzene chromium, the substitute group will affecttwo benzene rings. The effect is similar to the effect of branched alkanes, namely:the effect on neighbouring groups has transmissibility. Furthermore, the nearer theneighbouring group is, the stronger the effect is. This effect is observed not only onthe substituted ring, but also on the unsubstituted ring.

此外，我们重点计算了二苯铬及其衍生物和二茂铁及其衍生物的核磁共振谱，其中二苯铬及其衍生物选择的是对称性较好的体系，通过计算其核磁共振四川师范大学硕士学位论文谱，探讨其取代基效应，结果表明：在二苯铬的一个环上引入取代基后，取代基对两个苯环的影响，类似于支链院烃引入取代基后的影响：即对邻近基团的影响有传递性，并且对离得近的作用强，对离得远的作用弱，这种作用不仅体现在连有取代基的环上，也体现在没有带取代基的环上。

The temperature rising of lignite and slag containing chromium under microwave irradiation, and the detoxicated influences of slag containing chromium by using lignite as reducer were studied.

用褐煤作还原剂还原含铬废渣中Cr6+，考察了褐煤以及铬渣在微波场中的升温行为，研究了铬渣解毒的影响因素。

In order to solve chromium waste water by means of electrolyzed deoxidation, we apply polyacrylonitrile carbon blanket as pole, graphite as bipolar plate, positive ion film as diaphragm, to an oxidation-reduction system, in which negative pole electrolyzes and reduces chromium waste water; meanwhile, oxides Fe~{2+} into Fe~{3+} in positive pole.

为了电解还原处理含铬废水，以聚丙烯腈碳毡作电极，石墨板作双极板，以阳离子交换膜为隔膜，组装出氧化还原电池系统。此系统阴极电解还原处理含铬废水，同时阳极氧化Fe2+为Fe3+。电池系统的平均电流效率达92.29%，处理后废水中铬含量小于10-5mol/L，达到国家排放标准

Such customers will appreciate single-colour and 'b-colore' liveries in cool shades, a grille with a chrome frame, chrome exterior panels and chrome moulding on the sides.

这些客户将欣赏单一颜色，'B超冷色调，与镀铬框格栅colore'水桶，铬和铬合金外墙板成型两旁。

In Cr polluted area, leaf vegetable's Cr uptake is 2~3 times as much as fruit vegetable's. Aiming at optimization of manuring level of silicates and humic acid, pot experiments were carried out to study the effects of silicates and humic acid on physiology and Cr uptake by Brassica Chinensis.

针对在铬污染区土壤中的叶菜类吸铬量是果菜类2~3倍，以及硅酸盐或腐植酸在重金属污染土壤上的最佳施用量研究较少的问题，为保障蔬菜的品质安全，文章通过土壤盆栽试验，研究硅酸盐、腐殖酸不同用量对Cr污染土壤中小白菜生理指标和吸铬量的影响。

A fine quality of Zn-Cr coating can be synthesized as molar ratio of zinc powder:chromate=0.08-0.2,chromate:acrylic acid=0.8-4,the amount of polyvinyl alcohol in the coating bath reaches 20-40at%.

当铬酐与锌粉的质量比在0.08～0.2之间，铬酐与丙烯酸的质量比在0.8～4之间，10％聚乙烯醇含量在7～13wt％时，司·得到质量较好的锌铬涂层。

Rotary slag resistance method was used to make comparison tests of resistance to oil coke residue erosion of different fractories, such as zirconia brick, high purity corundum brick, chrome-corundum brick, 86 high chrome brick and 90 high chrome brick.

采用回转抗渣法进行氧化锆砖、高纯刚玉砖、铬刚玉砖、86高铬砖和90高铬砖等不同材质耐火材料抗石油焦渣侵蚀能力的对比试验，并采用扫描电镜和X衍射等分析方法对侵蚀试验砖的显微结构进行了观察与分析，研究了不同材质耐火材料抗石油焦渣侵蚀能力的差异。

Through the comparison, the method of directive recycling use of the used chrome liquor is more suitable than the one of chrome recovery from the used chrome liquor for tannery.

对目前国内外铬鞣废液的回收利用研究及方法进行了综述与比较，铬鞣废液的直接循环使用较回收铬的方法更易在制革厂实

The results of catalytic performance showed that chromium oxide has certain ammonia decomposition activity.

将氧化铬材料用于氨分解反应，发现氧化铬具有一定的氨解活性，在氨分解过程中，催化剂的组成发生了变化，氧化物部分氮化，氨解性能并没有明显的变化，表明氮化铬是氨解反应的活性中心。

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。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。