查询词典 nitrification

The soil nitrogen status is a function of the processes of nitrogen fixation , microbial decomposition, nitrification and denitrification

土壤氮状况是一个固氮、微生物分解、硝酸化和脱氮过程的作用。

Nitrite oxidoreductase was responsible for the nitrification of nitrite-oxidizing bacteria, which was coded by norB gene and others.

硝化菌主要由两大生理群组成：氧化氨氮为亚硝酸盐氮的是亚硝酸菌；氧化亚硝酸盐氮为硝酸盐氮的是硝酸菌，硝酸菌中负责硝化作用的酶是亚硝酸氧化还原酶，这个酶由norB等基因编码，因而对这个酶和基因的研究将有助于氮污染的控制和防治。

Inhibition to biological treatment process by seven naphthalene derivatives was investigated with Rank Cell respirometer, and all the test chemicals were proved to be potential inhibitors to both activated sludge process and nitrification at different level.

用Rank Cell呼吸仪研究了2-萘酚、1-萘胺、5-氨基-1-萘酚、1-氨基-4-氯萘、2-萘磺酸、2-氨基-1-萘磺酸和7-氨基-4-羟基-2-萘磺酸等七种萘系列有机化合物对生物处理过程的抑制，证明被测化合物对活性污泥过程和硝化过程均有不同程度的抑制作用。

It could be concluded that soil temperature and water content were the two most critical factors controlling the gross nitrification in subalpine coniferous forest soil.

总之，土壤温度和水分含量很可能是影响总硝化速率的两个最主要的因素。

Nitro-4-methylsulfonylbenzoic acid was prepared from 4-toluene sulfonyl chloride by the reaction of Alkylation (in the condition of sodium sulfite and baking soda), Nitrification (in the condition of nitric acid and vitriol) and Oxidation reaction (in the condition of nitric acid and catalyzer).

研究了以对甲苯磺酰氯为起始原料，首先通过亚硫酸钠和碳酸氢钠的水溶液进行烷基化、其次在浓硝酸和浓硫酸加热回流的条件下峭化、最后在浓硝酸和催化剂的条件下进行氧化，3步反应合成了玉米田高效除草剂甲基磺草酮的重要中间体2-硝基－4-甲磺酰基苯甲酸。

Exploratory study was made on the Guanting reservoir influent treatment by using two-stage BAF at extreme low temperature.The results show that the removal of organics and ammonia nitrogen is seriously inhibited due to low temperature,and the conversion of nitrite into nitrate is no longer a limiting factor of complete nitrification.One possible hypothesis is that the activity of nitrobacter is hi gher than that of nitrosomonas at extreme low temperature.

摘 要：两级曝气生物滤池在极低温度下(1℃以下)处理官厅水库入库水的探索性研究试验结果表明，有机物和氨氮的去除受到了低温的严重抑制，亚硝酸盐转化成硝酸盐不再是完全硝化反应的限制步骤，这可能是在极低温度条件下硝酸菌的活性高于亚硝酸菌活性的缘故。

The kinetics of nitrification biofilm in upflow and pure oxygen has been studied.

对上向流直接供氧生物膜硝化动力学进行了试验和讨论。

In order to optimize the nitrification design of the bioreactor,the influence of applied loading and temperature on the population structure of microorganisms in a two-stage upflow biological aerated filter was investigated.

为优化反应器的脱氮设计，就水力负荷、温度对二级上向流曝气生物滤池内微生物种群结构的影响进行了研究。

Reducing ammonic volatilization and nitrification,using high N use efficiency and low N responsiveness simultaneously are the main approaches of sustainable development in agriculture to improve utilization ratio of nitogen,decrease environmental pollution and waste of resources.

减少氨的挥发和反硝化作用，选育氮高效、耐低氮品种是提高氮素利用率、减少环境污染与资源浪费和实现农业可持续发展的主要途径。

Reducing ammonic volatilization and nitrification,using high N use efficiency and low N responsiveness simultaneously are the main approaches of sustainable development in agriculture to improve utilization ratio of nitogen,decrease environmental pollution and waste of resources.

因此如何提高肥料利用率、降低肥料用量，研制高效无污染，成本较低，农民易于接受的新型肥料已成为现代农业科学发展的重大课题[3，4]。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。