查询词典 nitrogen-free

Whereas, the predicted results of ammoniac nitrogen degradations in case of different refuse densities display that once the refuse density is less than 535 kg/m3, the refuse density has little effect on the leachate ammoniac nitrogen degradation.(2) the diameters of leacheate collection pipes is also one of important factors to influence the leachate quality degradation.

但是，对不同压实密度的准好氧填埋场的渗滤液氨氮衰减预测显示，当压实密度小于535 kg／m~3时，其对准好氧填埋场的渗滤液氨氮降解效果影响不甚明显；(2)渗滤液收集管管径也是影响准好氧填埋场降解效果的重要因素之一。

But ammoniac nitrogen content increased in every organ of cotton with the increase of NH4~ density, and the maximum of ammoniac nitrogen accumulation in each cotton presented in the solution of 75/25 ratio, not in the solution of 100/0 (NH4/NO3~) ratio.

田间条件下，随着氮肥水平的提高，棉田土壤中残留全氮含量和铵态氮含量呈明显增加的趋势。

The content of total Phosphorus was very high, with the average of 2.63mg/g, while the nitrite was very low and there was no relative chemic counterbalance among nitrate, nitrite and ammoniate, because the inorganic nitrogen circle was also affected by organic nitrogen in water and sediments.

以滇池马村湾和海东湾为研究对象，对其沉积物－间隙水－上覆水三界面中的磷、氮形态作研究，其中钙结合态磷占的比例最大，其次是有机/细菌聚合态磷和残渣磷；总氮含量很高，平均值为2.63 mg/g，而亚硝酸盐氮含量很低，其它三种无机氮形态（硝酸盐氮、亚硝酸盐氮和氨氮）之间并不存在恒定的化学计量关系，这主要是无机氮循环还受水体和沉积物中有机氮的影响。

The reason was that Available-N was restraining the ammonification of organic nitrogen with the improving nitrogen.

而有机肥与化肥配合施用虽然可以提高可矿化氮含量，但与单施氮肥和单施有机肥处理差异不大。

Terrestrial microorganisms play a vital role in soil nitrogen cycling. They participate in important ecological processes such as nitrogen fixation, ammonification, nitrification and denitrification.

土壤微生物在土壤氮循环中发挥着不可替代的作用，参与了包括固氮作用、氨化作用、硝化作用和反硝化作用等重要生态过程。

Adjusting pH to 12, air-liquid ratio to the range of 3 000～4 000 and temperature to the range of 35～45℃, after the washing wastewater from deposited ammonium carbonate that the initial concentration of ammonia nitrogen was 1 570 mg/L was treated by ammonia stripping, the residual concentration of ammonia nitrogen was controlled to below 100 mg/L and removal efficiency reached to over 94%.

发现pH、温度和气液比是氨氮去除效率高低的关键因素，废水初始浓度对去除率无影响。调节废水pH=12，气液比在3 000~4 000，温度在35~45℃范围，浓度为1 570 mg/L的碳铵沉淀洗涤废水经氨吹脱处理可使出水残余氨氮浓度控制在100 mg/L以下，去除率达94%以上。

By measuring and analyzing the total nitrogen,α-amino nitrogen and component, the effect of high pressure on the autolysis of anchovy, and the effect of salt addition as well as enzyme added on the high pressure hydrolysis were investigated.

以水解液总氮含盆、α-氨基氮及游离氨基酸组成成分等为指标，研究了超高压在鳀鱼自身降解过程中所起的作用，同时讨论了超高压下添加盐、外源酶对超高压作用效果的影响。

It is composed of fly ash or mud, nitrogen and water arid formed by physical mixture. It makes use of the all-around capability of solid, liquid and gas states to prevent mine fire. In other words, the fly ash or mud can cover the combustible, the nitrogen can asphyxiate it and the water can cool it.

由粉煤灰或黄泥、氮气和水通过物理机械方式形成的防灭火三相泡沫，具有集固、液、气三相材料的防灭火性能于一体，充分利用粉煤灰或黄泥的覆盖性、氮气的窒息性和水的吸热降温性进行防灭火的特性。

In the successful achievement of autotrophic nitrogen removal for nitrite,the effect of nitrite concentration on nitrogen removal in anoxic bio-film filter was investigated.

在成功实现亚硝酸盐自养脱氮的基础上，探讨了亚硝酸盐浓度对缺氧生物膜滤池脱氮性能的影响。

Nitrogen fixation caused by azotobacter was one of the important origins of nitrogen resources in alpine grassland.

固氮菌的固氮作用是高寒草地土壤氮素的重要来源之一。

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。