查询词典 nitrogen

The combined application of strains ZW38 and ZL5 could effectively degrade the ammoniacal nitrogen in marineculture wastewater into the gaseous nitrogen with the poisonless and harmless in the environment.

结论］将ZW38和ZL5联合应用可以有效地将海水养殖废水中的氨态氮降解成为对环境无毒无害的气态氮。

Blowing can take off the ammonic nitrogen efficiently, the rate of removing the ammonic nitrogen reaches 90%....

实验结果表明，采用吹脱法能有效去除氨氮，控制PH在7.5左右，氨氮去除率可达90％以上。

The influence of organic loading, hydraulic loading, the ratio of gas and water and the height of filling to removal efficiency of COD, ammonic nitrogen and total nitrogen has been studied in BAF by using the self-confected wastewater.

中文摘要：本文以自配生活污水为实验用水，研究了有机负荷、水力负荷、气水比以及填料高度对BAF去除COD、氨氮、总氮的影响，并在沸石吸附饱和后对其进行生物再生。

3 Effects of zinc levels on endogenous hormone and nitrogen metabolism in leaves of balsam pear The results showed that zinc application could increase IAA, GA〓, protein, nuclear contents and NRase activity, but decrease tryptophane, nitric nitrogen , free ammonic acids contents and RNase activity in leaves of plants.

1.3 锌对苦瓜叶片内源激素与氮代谢的影响结果表明：施锌可提高叶片吲哚乙酸、赤霉素、蛋白质、核酸含量以及硝酸还原酶活性；降低色氨酸、游离氨基酸和NO〓含量以及RNase活性。

After 26 d composting,ammonical nitrogen and total nitrogen were improved obviously,which were 10.7 g·kg-1 and 36.9 g·kg-1 respectively in amended treatment,while they were 7.7 g·kg-1 and 26.8 g·kg-1 in un-amended trial.

结果发现，添加固定剂的堆肥处理B中铵态氮含量显著提高，堆肥结束时，NH+4-N含量为10.7 g·kg-1，是未添加固定剂的处理A的3倍，全氮含量为36.9 g·kg-1，比处理A提高10 g·kg-1。

In order to ensure efficient use of the nitrogen source compounds, the metabolic flux of elemental nitrogen was analyzed for L-tryptophan biosynthesis using the 15N anthranilic acid as a tracer in the experimental process.

为了有效的利用含氮的化合物，实验过程中，采用15N标记的邻氨基苯甲酸为示踪剂，分析了N元素在15NL-色氨酸合成过程中的代谢通量。

Basial nitrogen fertilizer of traditional treatment can beget leaching loss of soil nitrate before top-dressing, but top-dressing beget hardly the leaching loss because cotton assimilated large numbers of nitrogen for accelerated growing.

传统处理施肥量高，基肥比例大易引起土壤硝态氮的淋移损失，损失数量与棉花生育时期有关，棉花生育期追氮由于棉花对氮素的大量吸收，硝态氮淋移损失相对较小。

The present invention has the hot treating furnace pre-vacuumized to 10-100 Pa, introduced with high purity nitrogen and heated to 900-1050 deg.c, before maintaining and introducing acetylene gas to carburize at nitrogen pressure of 0.1-0.11 MPa and acetylene gas pressure of 5000-20000 Pa.

本发明通过向设有炉内循环风机的热处理炉进行预抽真空至10-100Pa，通入高纯氮气，再将炉温升至900-1050℃，保温后再通入乙炔气进行渗碳，炉膛内氮气的压力为1×10 5 -1.1×10 5 Pa之间，充入的乙炔分压为5000-20000Pa之间。

Relationship between soil nutrient and growth of Castanea mollissima was studied by stepwise regress and Path analysis.The results showed that, 4 soil factors of organic matter, hydrolytic nitrogen,rapid phosphorus and rapid potassium had significant effects on its yield and growth of fliage branch, and that the most significant factors affecting yield and growth of foliage branch were rapid phosphorus and hydrolytic nitrogen, respectively.

应用逐步回归和通径分析，对土壤养分与板栗株产和徒长枝生长的相关关系进行研究，结果表明，所选的有机质、水解氮、速效磷和速效钾4个土壤养分因子对板栗株产和徒长枝的生长都有着显著和极显著的相关关系，其中以速效磷对产量影响最为显著，水解氮对徒长枝生长影响最为显著。

As the results show: The two submerged macrophytes can also adapt to the polluted water. Under the condition of high nitrogen in the sediment, they can remove the nitrogen effectively, and the removal effect of Ceratophyllum demersum L.is better than Hydrilla verticillata Royle. Hydrilla verticillata Royle activates the TP in the sediment more effectively than Ceratophyllum demersum L.. The submerged macrophytes can intensify the removal effect of turbidity. But the CODMn removal effect of submerged macrophytes are not obvious.

结果表明：生长晚期的黑藻和金鱼藻仍可适应污染河水；在底泥含氮量较高的情况下，生长晚期的沉水植物对氮素具有明显的去除效果，且金鱼藻的脱氮能力高于黑藻；黑藻对底泥中TP的活化能力高于金鱼藻；沉水植物可以强化浊度的净化效果；沉水植物生长晚期对CODMn的去除效果不高。

I can not negligent, he should do what?

我不能不在意了，他要做什么呢？

It is very dangerous to swim in the river alone.

一个人到河里游泳是很危险的。