硝酸

The effects of solvent on the bromization reaction and oxidant on the formolation reaction of the target product were studied. The results show that the optimum solvent for the bromization reaction and the optimum oxidant for the formolation reaction of the target product were carbon tetrachloride and ceric ammonium nitrate, and their yields were 86.7% and 89.3% respectively.

同时就溴化反应中的溶剂以及甲酰化反应中的氧化剂对两类反应的影响分别进行了研究，结果表明溴化反应的最佳溶剂为四氯化碳，反应产率达到86.7%，甲酰化反应的最佳氧化剂为硝酸铈铵，产率达到89.3%。

The research progresses in degradation technologies of benzene or some of its derivatives in water are reviewed.The macroscopical reaction mechanism of HNO2(NO2-)and C6H5Br in aqueous solution has been studied.Different influence factors have been discussed,including different pH condition,initial concentration,irradiation time,different anions and the optimization of experimental conditions.By using liquid chromatography,the degradation rate of bromobenzene has been qualitatively analyzed.The concentration variations of Br~and NO2- have been analyzed by using ion chromatography.

本文介绍了苯及其衍生物对水环境所造成的污染和危害，研究了365nm光照下HNO2(NO2-)与C6H5Br混合溶液的宏观反应过程，初步考察了混合体系中溴苯的降解及衰减行为，较为系统地探讨了影响溴苯降解过程的各种影响因素，包括溶液的pH值、初始浓度、光照时间、不同离子的影响以及实验条件的优化，并利用液相色谱法进行定量研究溴苯的降解率，利用离子色谱法分析检测实验过程中溴离子和亚硝酸根离子的变化。

Six Treatments of foliage sprays on 18-year-old satsuma mandarintreeswith 1000 ppm calciferous solutions plus 5 ppm GA_3 thrice at interval of 15 days before fruitcoloring reduced intensively the occurrence of peel puffing.

以18年生枳低砧温州蜜柑为试材，采用叶面喷施，分别设醋酸钙、硝酸钙、碳酸钙各1000ppm，另在以上3种试剂中各1000ppm加5ppm赤霉素(GA_3)及清水对照共7个处理，于果实将近着色时，每半月喷施1次，共喷3次。

Newborn rat calvaria osteoblastic cells were incubated with TNF-α(20、30、40ng/ml) for 24 and 48h.

用TNF-α 20、30、40ng／ml的量刺激成骨细胞，观察24、48小时，测定细胞培养液中亚硝酸根含量。

It was found that the condensation could be completed within 24 hours at 60°C in a solution containing 10mg CAWs, 20mg 2-aminoethyl mercaptan, 10mL CH2Cl2, 1 mL triethyl amine and 0.2g DCC (N, N'-dicyclohexyl carbodiimide).

实验结果表明：10mg经浓硝酸氧化处理过的碳原子线在含有20mg巯基乙胺、10mL CH2Cl2、1mLN3、0.2g DCC的液相反应体系中，60℃温度下作用24h可完成缩合反应，生成巯基化碳原子线。

Extraction of fish oil is done in the temperature of 65℃,70℃, 75℃,80℃,85℃,90℃and95℃ in turn in the condition of pH8.0,55mins in hydrolyzing,20mins in salting out with 4.5 percent of potassium nitrate and 30mins in centrifugalization with 3000r/min.

在传统淡碱水解工艺的基础上，将氢氧化钾和硝酸钾分别替换原工艺中的氢氧化钠和氯化钠，在pH8.0、水解时间55min、用4.5%的硝酸钾盐析30min、用3000转的离心机离心30min的条件下，分别在65℃、70℃、75℃、80℃、85℃、90℃、95℃时提取粗鱼油。

Based on traditional technology of light alkaline bydrolysis,sodium hydroxide and sodium chloride in original technology will be replaced by potassium hydroxide and potassium nitrate differently.Extraction of fish oil is done in the temperature of 65℃,70℃, 75℃,80℃,85℃,90℃and95℃ in turn in the condition of pH8.0,55mins in hydrolyzing,20mins in salting out with 4.5 percent of potassium nitrate and 30mins in centrifugalization with 3000r/min.

在传统淡碱水解工艺的基础上，将氢氧化钾和硝酸钾分别替换原工艺中的氢氧化钠和氯化钠，在pH8.0、水解时间55min、用4.5%的硝酸钾盐析30min、用3000转的离心机离心30min的条件下，分别在65℃、70℃、75℃、80℃、85℃、90℃、95℃时提取粗鱼油。

First of all, acrylamide, pentaerythrite and ammonium ceric nitrate were mixed by some concentration in an aqueous solution.

首先将丙烯酰胺、季戊四醇和硝酸铈铵分别配制成一定浓度的水溶液。

In this paper,we have reported the regularities of graft copolymerization of butyl acrylate onto potato starch using ceric ammonium nitrate as an initiator.

本文以硝酸铈铵为引发剂，研究了丙烯酸丁酯与土豆淀粉接枝共聚的反应规律。

A homogeneous redox initiator system with ceric ammonium nitratein N,N-dimethyl-formamidewas reported in this paper.

研究了均相氧化还原体系硝酸铈铵/N，N-二甲基甲酰胺在无外加还原剂的条件下，引发丙烯酸甲酯，苯乙烯和甲基丙烯酸甲酯等烯类单体的聚合。

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。