查询词典 nitric acid

The results showed that removal rates of five metals were 3.79%, 2.04%, 1.66%, 0% and 0%, respectively, under conditions of ultrasound time of 20 minutes. When nitric acid was added to the sludge, the removal rates were 2.32%, 40.67%, 68.15%, 26.98% and 27.24%, respectively.

结果表明，在超声时间为20分钟时，未加酸时五种重金属Cu、Zn、Pb、Cd和Cr的去除率分别为：3.79%、2.04%、1.66%、0%和0%，而加酸时其去除率分别为：2.32%、40.68%、68.16%、26.98%和27.24%。

Passive film was formed onto the surface of stainless steel in nitric acid solution.

在90℃温度均匀腐蚀条件下，经过40天后，321不锈钢样品在低酸度的硝酸铀酰溶液中的腐蚀速率小于0.04g／m〓。h，铀酰离子以六水硝酸铀酰的形式吸附于321不锈钢表面，在含氯离子和次氯酸根离子的硝酸铀酰溶液中，321不锈钢发生了点蚀，出现了点蚀坑。

Influence of fluorine on filtration of acidinsoluble matter, crystal and filtration of calcium nitrate , ammonia neutralization of mother liquor and evaporation process of slurry are discussed based on its increasing slurry viscosity, growing fine crystal and troubling filtration in production of nitrophosphate by nitric acid decomposing phosphate rock.

介绍在硝酸分解磷矿生产硝酸磷肥的过程中，杂质氟对酸不溶物过滤、硝酸钙结晶及过滤、母液的氨中和及料浆蒸发过程的影响。

Oxygen,nitrogen,liquid oxygen,liquid argon,hydrogen peroxide,carbon monoxide,carbon dioxide,sodium bicarbonate,sodium carbonate,hydrogen,hydrogenized oil,liquid ammonia,ammonia liquor,nitric acid,synthetic ammonia,fatty alcohol and so on.

氧气，氮气，氢气，一氧化碳，二氧化碳，液氧，液氩，液氨，氨水，硝酸，双氧水，碳酸氢钠，碳酸钠，合成氨，脂肪醇等。

Therefore, it is very important to make some research on the issue of management communication in order to improve the operational efficiency of large-scale construction projects. Adopting the method of case study, this article takes the LiaoYang Petrochemical Fiber Company's 116,600 ton/year dilute nitric acid 40,000 ton/year high density aqua fortis project as an example,...

文章采用案例描述的方法，对中国石油集团公司旗下的辽阳石油化纤公司11.6万吨/年稀硝酸4万吨/年浓硝酸项目中的P042.5水泥质量问题事件、氧化炉设备拖期事件和吸收塔吊装事件中存在的管理沟通问题进行了详细的描述，并分析了其中由于项目主体分工不明而导致的沟通不畅、利益分配不均等问题。

Products to sponge cadmium, cadmium oxide, cadmium nitrate, sulphate cadmium, nickel foam, metal cadmium powder as the main products of the coexistence of a variety of operations, monthly production reached: 200 tons of cadmium oxide, cadmium off more than 50 tons, cadmium powder 30 Tons, 300 tons of nitric acid cadmium, nickel foam 12,000 square meters, and so on, the annual turnover to reach 36 million.

产品以海绵镉、氧化镉、硝酸镉、硫酸镉、发泡镍、金属镉粉为主要产品的多种经营方式并存，月产量达到：氧化镉200吨、海面镉50多吨、镉粉30多吨、硝酸镉300吨、发泡镍12000平方米等等，年营业以达到3600万。

The effect of refluxing treatment of nitric acid and adding of nickel oxide to carbon nanotubes on the properties of supercapacitors was also studied.

分析了复合电极材料的结构和形貌，研究了碳纳米管与氧化镍复合、回流表面改性对超大容量离子电容器性能的影响。

Methods The various trace elements in marten' s heart and chicken's heart were measured by inductively coupled plasma atomic emission spectroscopyafter they were treated with concentrated nitric acid.

应用电感耦合等离子体原子发射光谱法测定经消化后的貂心和鸡心中的微量元素。

A new technology for making chromium trioxide and potassium nitrate simultaneously by using nitric acid to decompose potassium dichromate has been analyzed according to phase diagrams of the K2Cr2O7-CrO3-KNO3-HNO3-H2O quaternary system at 0oC, 25oC and 45oC based on experimental results.

以实验测得的K2Cr2O7-CrO3-KNO3-HNO3-H2O四元体系相图为依据，对用硝酸酸化重铬酸钾联产铬酸酐和硝酸钾工艺过程进行分析，确定了铬和钾利用率最大时的操作条件。

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。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。