亚硝化

Diphenylamine contents in single base propellants were determined by means of a single-sweep-square-wave polarography after the treatment of nitrosation of DPA.

将单基发射药亚硝化后用单扫描方波极谱法测定溶液中的二苯胺含量，用丙酮溶解单基发射药试样，使用组成与待测样品相同的单基标准样品作工作曲线。

The experimental results showed that the nitrite accumulation obtained from selective inhibition of high concentration free ammonia to nitrifier was unstable.

论文摘要：采用沸石作滤料的生物滤池工艺，分别在高浓度氨、低溶解氧运行的条件下探讨了亚硝化过程选择性的实现。

Flavone compounds has a broad application in inhibiting nitrosamine reaction.

黄酮类化合物在抑制亚硝化反应中有着广泛的应用。

This paper play emphasis on the mechanism of flavone compounds inhibiting nitrosamine, the change of content in flavones and the results of scavenging nitrite nitrogen, offering some help to seek effective pharmaceutical.

重点探讨黄酮类化合物抑制亚硝化反应的机制，典型植物中黄酮含量变化规律及阻断亚硝胺合成或清除亚硝酸盐的效果，以期为寻求最佳的抗癌药物提供帮助。

The results show that the bud bacilli can oxidate ammonia to nitrous, and when ammonia concentration in wastewater ranges from 25 mg/L to 70 mg/L, ammonia removal amount is direct proportion to ammonia concentration in wastewater and ratio of ammonia removal ranges from 58% to 69%.

结果表明，芽孢杆菌主要进行亚硝化脱氮，在氨氮进水浓度25～70 mg/L范围内，氨氮去除量与进水氨氮浓度成正比，氨氮的去除率稳定在58%～69%。

The results show that the bud bacilli can oxidate ammonia to nitrous, and when ammonia concentration in wastewater ranges from 25 mg/L to 70 mg/L, ammonia removal amount is direct proportion to ammonia conce...

结果表明，芽孢杆菌主要进行亚硝化脱氮，在氨氮进水浓度25～70mg/L范围内，氨氮去除量与进水氨氮浓度成正比，氨氮的去除率稳定在58%～69%。

Taking piggery wastewater with high ammonia nitrogen and organic concentrations as treatment object,the ANAMMOX-based nitrosation process was investigated under the condition of ambient temperature of 25 ℃ and constant pH.

以高氨氮、高有机物浓度的养猪场废水为处理对象，在室温(25℃)、不调节pH的条件下，研究了基于厌氧氨氧化的亚硝化过程。

This paper deals with the effects of the extract from different parts of corn on capabilities of disconnecting nitrosodimethylamin synthesis and scavenging sodium nitrite.

在体外模拟胃液条件下，玉米各部位提取物均显示了较好的抑制亚硝化反应及阻断亚硝胺合成的作用，其阻断和清除率随提取物浓度的增加而增加。

Ontent of tyramine was determined in salted and dried small fish collected from high-risk area of gastric cancer in Zhuanghe County, Liaoning Province with high pressure liquid chromatography,and its mutagenicity after nitrosification was assayed.

胃癌高发区庄河县小咸鱼干中酪胺的致突变性孙长颢，陈炳卿，王舒然，王选杰摘要用高压液相色谱法对胃癌高发区小咸鱼干中的酪胺进行了测定及其亚硝化以后的致突变性检测。

Formyl-3-acetyl-4-methyl-5-carbobenzoxypyrrole (6) was synthesized via the selective oxidation of 2,4-dimethyl-3-acetyl-5-carbobenzoxypyrrole (5), which was produced from acetylacetic benzylester (1) via nitrosation, reduction and addition-cyclization with acetylacetone. The total yield of the product was about 34%.

以乙酰乙酸苄酯(1)为原料，经过亚硝化、还原、与乙酰丙酮加成环化生成2， 4-二甲基－3-乙酰基－5-苄氧羰基吡咯(5)，通过选择性氧化反应制得目标化合物2-甲酰基－3-乙酰基－4-甲基－5-苄氧羰基吡咯(6)，反应的总收率约为34%。

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。