氮循环

The mechanism in nutrient recycling and the function in water ecosystem of heterotrophic flagellate were also discussed.

综述了异养鞭毛虫多样性、群落结构、摄食生态学以及在氮、磷循环中的作用，分析了其在生态系统中的功能。

Keywords: nitrogen cycle;heterotrophic ammonia oxidizing bacteria;bacillus;The metabolism of Carbon and Nitrogen

中文关键词：氮素循环；异养氨氧化细菌；芽孢杆菌；碳氮代谢

The integrated wastewater treatment system consists of three units, an integrated oxidation ditch with vertical circle for wastewater treatment, an oligochaete reactor for sludge reduction, and a combined bacterial and fungal reactor for odors removal.

项目简介：清洁型污水处理一体化系统利用立体循环一体化氧化沟去除污水中的有机污染物，同时去除氨氮、总悬浮固体；利用原/后生动物寡毛类蠕虫吞食污泥颗粒，实现污泥减量；利用细菌和真菌去除臭味气体。

Arginase, which converts arginine to ornithine and urea, is a kind of enzyme in urea cycle. It plays a significant role in N mechabolism.

精氨酸酶是尿素循环中的一种酶，催化精氨酸水解产生鸟氨酸和尿素，在机体氮代谢方面起了重要作用。

The Benson-Calvin cycle is restricted to the BS cells, minimizing photorespiration and allowing increased carbon, nitrogen, and water use efficiency.

在本森，卡尔文循环的限制细胞的学士学位，尽量减少光呼吸和使更多的碳，氮和水的使用效率。

A 5. 5h anti-impinge test indicated that the whole technical process had a better anti-impinge ability The feasibility modeling test of water quality showed that the quality of reclaimed water after the treatment by the above process, when used as supplementary circular cooling water and boiler water, met the nation standards in the respect of corrosion, scaliness and bacteria breeding, and even better than the normally used cooling water.

以炼厂实际外排污水为原水，通过两期水力负荷分别为0.2m3/h和0.5m3/h中试规模测试，当本工艺处理水力负荷0.5m3/h、水力停留时间1.49h，污水中COD、氨氮、石油类、悬浮物、挥发酚的浓度变化分别为44.07～102.13mg/l、28.37～50.01mg/l、4.68～19.36mg/l、7.2～34.5mg/l、0.14～0.31mg/l时，平均去除率分别达到94％、96.1％、91.9％、98.2％、100％，出水各项指标均符合循环水补充水水质要求；且通过5.5h抗冲击实验结果显示，整体工艺具有较强的抗冲击能力。

Objective To investigate the protective effects of L-arg and antegrade selective cerebral perfusion through right subclavian artery on brain during deep hypothermic circulatory arrest.

目的：研究一氧化氮前体L-精氨酸和经右锁骨下动脉选择性脑灌注在深低温停循环中对脑组织的保护效果。

Investigation was performed from various aspects, such as the filtrability and properties of mixed liquor, configuration and flow pattern of internal loop airlift submerged membrane bioreactor, nitrogen removal and the control measure of membrane fouling.

并就气升内循环浸没膜生物反应器的结构和运行流态、各类膜生物反应器体系的脱氮效率以及膜污染控制技术进行了探讨。

10 kt/a anti-block industrial potassium nitrate is using magnesium nitrate and potassium chloride as raw materials,with the new production techniques of producing potassium nitrate with the newly-developed double decomposition circulating reaction method.By-product magnesium chloride hexahydrated with a small amount of potassium nitrate is called nitrogen-potassium-magnesium fertilizer.

张罡摘要： 1万t防结块工业硝酸钾的生产装置选用硝酸镁与氯化钾为原料，采用新研究开发的复分解循环反应法生产硝酸钾新工艺，副产品为六水氯化镁，六水氯化镁含少量硝酸钾，故称之为氮钾镁肥。

A 8-week growth experiment was conducted to estimate the quantitative requirement of tourmaline for GIFT strain of Nile tilapia [initial body weight(15.90±0.1) g] by feeding five isonitrogenous(33%) and isoenergetic(17.2 MJ/kg) diets containing five levels of tourmaline at 0, 0.5％, 1%, 2% and 3%, respectively.

试验以（15.90±0.1） g的吉富罗非鱼为试验对象，在等氮（33%）等能（17.2 MJ/kg）的基础上，在其日粮中分别添加0、0.5％、1％、2％和3％的固相负离子粉，在循环水养殖系统中进行8周的生长试验。每种饲料设计3个重复，每桶放鱼30尾。

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。