查询词典 nitrification

Bromo-5-formyl -3-methylpyrrole is an important intermediate of tolyporohin. On the base of introducing the present research and development of tolypo- rohin and pyrroles ramification at home and abroad, an emphasis was made on synthesis of 2-Bromo-5-formyl -3-methylpyrrole and the technical conditions of all steps, which was described as follows. Diethyl 3,5-dimethylpyrrole-2,4-dicarboxylate was made by nitrification, reduction and cycle of ethyl acetoacetate.

由于2-溴-5-甲酰基-3-甲基吡咯是合成托尼卟吩的重要中间体，本文在阐述了当前托尼卟吩及吡咯衍生物的国内外研究和开发的基础上，重点研究了2-溴-5-甲酰基-3-甲基吡咯的合成，并对各步反应进行了工艺研究，具体合成步骤如下：本文通过对乙酰乙酸乙酯的亚硝化、还原、成环，反应生成吡咯单环衍生物2，4-二乙氧羰基-3，5-二甲基吡咯。

The removal of micro-organic pollutants in the polluted water sources by the bio-nitrification process of oxygen enrichment with the elastic filling and micropore aerators has been studied for raw water in the polluted river.

为提高微污染水源水的饮用水质安全性，采用弹性填料微孔曝气富氧生物接触氧化工艺处理受污染的某水源原水，进行了除微量有机化学污染物的比较研究。

The expression of one-dimensional mathematical model of vertical migration of ammonia in the CRI system is:The parameters in the CRI model are determined as following: the retardarce coefficient is determined by static isothermal absorption experiment, the velocity of sewage travel through the soil column is determined by permeability test, the vertical dispersion coefficient is determined by test the electric conductivity of tracer in the dispersion experiment, the rate of nitrification and denitrification is determined by test of Baps technology.

依据单一氨氮、硝氮配水条件下的试验结果，引入多孔介质的溶质运移理论及对流-弥散方程，考虑NH4+-N在CRI系统中的运移受到对流和水动力弥散作用的影响，并吸附-解吸、硝化与反硝化3个过程，首次将配水流经CRI土柱的孔隙水流速方程与CRI土柱内发生的、以氧为约束条件的硝化、反硝化过程联系起来，建立了CRI系统一维垂向氨氮运移转化数学模型，表达式为：研究分别通过静态等温吸附实验率定了模型方程中的阻滞系数、通过渗滤试验测定了土柱中的孔隙水流速、通过测定弥散试验中示踪剂的电导率确定了纵向弥散系数、通过气压过程分离技术测定了土柱中的总硝化与反硝化反应速率常数，最后通过测定土柱沿程氧化-还原电位的方法分析氨氮在CRI系统中的运移转化机理。

After two rice-wheat rotations, 11%–13% of applied labeled N remained in 0-60 cm soil (mostly in the 0-20 cm soil); leaching of labeled urea applied in rice season was little (only 0.6%–1.1% of the applied N accumulated in 20-60 cm soil), and the leaching of fertilizer N occurred in wheat season and the beginning flooding period of the next rice season; 47%–54% of applied fertilizer N was lost and ammonia emission and nitrification-denitrification were the main pathways.

水稻季施用的肥料氮向耕层以下移动很少，20—60 cm土层中累积肥料氮仅占施氮量的0.6%～1.1%，主要发生在小麦季及水稻泡田时期，肥料氮损失占施氮量的47～54%，氨挥发和硝化反硝化气态损失是主要途径。

Results show that the leachates from the acid soils were not necessarily acid, and their pH values depended on combined effect of H(superscript +)release rate from nitrification and acid buffering capacity of the soils.

结果表明：酸性土壤的渗漏液并不一定呈酸性。

Based on incubation tests with labelled and unlabelled urea, this payer discussed the effects of hydroquinone on hydrolysis of urea, release and volatilization of ammonium, nitrification, denitrification and immobilization.

本文根据用标记和非标记尿素进行的培养试验，论述了氢醌对于尿素的水解、氨的释出和挥发、硝化和反硝化作用以及生物固持的影响。

According to the production mechanism and characteristic of NOx,the technologies of NOx inhibiting and removing in the process of coal combustion were classified into three kinds:nitrogen-free combustion,low NOx combustion and de-nitrification of flue gas.

根据NOx产生的机理和特点，燃煤过程NOx抑制与脱除技术主要包括无氮燃烧技术、低NOx燃烧技术以及烟气脱硝三类。

The isolated anaerobic ammonia oxidisers could carry out both anaerobic ammonia oxidation and nitrification.

反之，所分离的ANAMMOX菌除了能进行ANAMMOX外，也能进行亚硝化作用。

At the same time, the rhizosphere is favourable to the nitrification, the rhizosphere effect R/S is about 4.5;②The loss rate of -N in 24 h in flooded and anaerobic incubation is 52%?

58％，占第10天的55％？71％，且表土层-N的消失率比底层土大；③参与同化反硝化作用的还原酶活性较强，在培养24h后，被还原的基质数量占加入基质数量的70％？

NH4 +-N in the wetlands to remove the hydrazine mainly by microorganisms, nitrification and demystification. Plants absorb and volatile, matrix adsorption, filtration, sedimentation and ammonia volatilization.

中文摘要： NH4+-N中N的去除主要是通过微生物的氨化、硝化与反硝化作用，植物的吸收和挥发作用，基质的吸附、过滤、沉淀和氨的挥发等。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。