硝酸

Nanocrystalline ZnO was prepared by the combustion synthesis method for the first time.

首次以硝酸锌和甘氨酸为原料，用燃烧合成法制备了纳米ZnO粉体。

In these experiments, we have choosen the activated carbon as the support, and copper nitrate, copper acetate and copper sulfate were used as precursors to prepare the supported activated carbon-copper catalysts. Toluene was chosen as pollutant for activity test.

本实验选择活性碳当担体，而前驱物为硝酸铜、醋酸铜、硫酸铜制备金属活性相为铜之触媒，并假设目标污染物为甲苯来进行实验探讨。

During the process of acidic potassium chloride zinc plating for iron workpiece,the deposit obtained at low current density was shown to be foggy with white spots,and the phenomena failed to disappear even after bright dipping and passivation in nitric acid.

在对某铁件制品进行酸性氯化钾镀锌过程中，镀层出现低位发雾，而且有白斑，在硝酸出光及钝化后依然存在。

PAN-ACF was modified by different methods, such as heat oxidation, nitric acid dipping and hydrogen peroxide dipping, the characteristics changes of the PAN-ACF before and after modification such as kinds of surface functional groups, amounts of oxygen function groups, surface microstructure and specific surface were analyzed by FT-IR, Boehm.

采用热氧化、硝酸浸渍、过氧化氢浸渍等方法对聚丙烯腈基活性炭纤维进行改性处理，使用FT-IR、Boehm滴定法、SEM、BET等分析技术表征了改性前后PAN-ACF表面官能团种类、含氧基团数量、表面微观结构及比表面积等表面特性。

The results showed that nitrate and sulfate were more favorable electron acceptors compared to ferric iron.

结果表明，苯、甲苯和乙苯在以硝酸根和硫酸根为电子受体、污染物初始浓度较低的条件下，降解效率可达95％，而以3价铁为电子受体或者初始浓度较高时降解效率较低。

The corrosion characteristics in water, 5% HCl solution and 5% HNO3 solution of the coatings on 45 steel cladded by electrospark deposition with Cr, W, Mo and Ni anode was studied.

对正火45钢基体上的Cr、W、Mo和Ni电极电火花熔涂层在水、5vol%盐酸及硝酸水溶液中的腐蚀行为进行了研究。

Fresh Alocrom 1200 coatings may be removed without seriously etching the aluminium by immersing in 50% nitric acid or in the Deoxidiser bath.

刚做的ALCOCROM 1200镀层可以浸没在50%的硝酸里或者脱氧剂Deoxidiser浴缸里去除镀层，而不会明显地腐蚀铝材。

Fluoride ion and iodide ion adsorbed on the PAN fiber could be desorbed by Al(NO_3)_3 and NaOH. And this process showed the fiber was easy to desorb and can be used repeatedly.

又以硝酸铝和氢氧化钠分别用来对吸附了两种离子的纤维进行解吸，表明该纤维易于解吸，容易再生，而且多次重复使用性能良好。

In the H〓SO〓 system, the interfacial tension decreased much lower in three diluents compared with that of HNO〓 and HCl system.

在硫酸水溶液中，BODMAC在三种稀释剂中的界面张力最低；而对于盐酸和硝酸体系，不同稀释剂中，BODMAC的界面张力降低的情况不同。

The effects on desorption of eluent concentration,desorption time and eluent volume were examined.

实验结果表明HCl、HNO3、NaCl、Na2S2O3、EDTA和柠檬酸都是有效的解吸剂，以硝酸的解吸效果为最好。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。