查询词典 ammonia nitrogen

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

An enzyme of nitrogen-fixing bacteria that activates the conversion of nitrogen to ammonia .

组胺酶一种消化系统中的酶，能减弱组胺的活性

Igneous electricity flue gas takes off saltpetre system whether achieve take off saltpetre rate and low ammonia gas high to escape rate, depend on greatly the flue gas is medium nitrogen oxide before entering saltpetre reactor and reducer ammonia gas blend even degree and flue gas speed to distributing.

梗概： 火电烟气脱硝系统能否达到高脱硝率和低氨气逃逸率，很大程度上取决于进入脱硝反应器之前烟气中的氮氧化物和还原剂氨气混合均匀程度和烟气速度分布。

Removal of high concentration of ammoniacal nitrogen discharged in rare earth production process by VMD is basically studied in this paper, and VMD can achieve the purpose of ammoniacal nitrogen removal and reuse of recovered ammonia at the same time.

进行了减压膜蒸馏法处理含高浓度氨氮的稀土冶金所排废水的基础研究，该法可达到脱除废水中高浓度氨氮及回收氨回用于生产过程的目的。

Based on this principle, the mathematical model of an exothermic reactor is established to caculate Exothermic reator length L corresponding to reation temperature T, reation temperature T corresponding to ammonia mole fraction y and the average internal reactor wall temperature Tave corresponding to exergy output Enet and thermal power output Q. The curves of L-T, T-y, Q/Enet –Tave are drawn with the caculated date which can directly reflect the influence of reactor inlet gas temperature and reactant flow rate on ammonia synthesis reaction for the reactor under the conditions of definite design pressure and hydrogen/nitrogen ratio. Furthermore, the design parameters to realize maximum exergy output and thermal output are presented.

文章分析了储能体系的选择，介绍了氨基热化学储能的基本原理，在此基础上建立了放热反应器的数学模型，计算和绘制出了L-T、T-y以及热量和佣输出与反应器内壁平均温度之间的关系曲线，直观地反映了在一定的设计压力和氢氮比条件下，进气温度和进气流率对放热反应的影响，给出了实现佣最优化和热能最优化的操作参数。

Nitrogen fertilizer sources subject to ammonia volatilization losses are urea, urea-ammonium nitrate solutions, and anhydrous ammonia.

容易形成氨挥发损失的氮肥品种有：尿素、尿素-硝酸铵溶液和液氨。

I plant specializing in the production of carbon dioxide gas, nitrogen, hydrogen, oxygen, torch gas, nitrogen, vinyl chloride, propylene gas, liquefied petroleum gas, natural gas, liquefied petroleum gas, ammonia, sulfur dioxide and other processes of the compressor.

我厂专业生产二氧化碳、煤气、氮氢气、氧气、火炬气、氮气、氯乙烯、丙烯气、石油气、天然气、液化气、氨气、二氧化硫等工艺性压缩机。

The mainly conclusions in our research are as flowing: tungsten trioxide powders with 100 nm primary particle are obtained by spray drying,calcination and wet milling process, and an average size of quadric particle composed of agglomerated particles is 0.64 μm; tungtsen powders with 39 nm grain size and 60 -100 nm primary particle are produced directly from previous tungsten trioxide using one step reduction in hydrogen at 700℃, and an average size of quadric particle of tungsten powder is 2.91 μm; tungsten trioxide and copper tungstate compound powders with 100 nm - 200 nm primary particle are produced using ammonia metatungsten and copper nitrate as raw materials by spray drying,calcination and wet milling process;the compound powders are transformed completely into tungsten and copper compound powders by reduction in hydrogen at 700℃,in which tungsten grain size is 59 nm and copper grain size is 51 nm; primary particle size of compound powders is 80 - 120 nm,and an average size of agglomerated quadric particle is 1.86 μm; tungsten nitride powders with 35 nm grain size are prepared from tungsten trioxide powders by nitrogen treatment thoroughly in pure ammonia at 650℃, and an average size of agglomerated quadric particle is 0.64 μm in normal temperature.

研究结果表明：采用喷雾干燥—焙烧—球磨工艺可以制备出粒度约为100nm的WO_3粉体，它们在团聚后形成的二次颗粒平均粒度为0.64μm；采用一步直接氢还原方法可在700℃下从上述WO_3粉体制备出晶粒尺寸为39nm的、一次颗粒粒度为60-100nm的W粉体，其二次颗粒的平均粒度为2.91μm；以偏钨酸铵、硝酸铜为原料，采用喷雾干燥—焙烧—球磨工艺可制备出一次粒度为100-200nm的WO_3和CuWO_4混合粉体；采用氢还原工艺可在700℃下将这种粉体完全转变为W、Cu复合粉体，其中W的平均晶粒粒尺寸为59nm，Cu的平均晶粒尺寸为51nm；复合粉体的一次颗粒尺寸为80-120nm，在常温下团聚后形成的二次平均粒度为1.86μm；采用纯氨氮化工艺可以在650℃下由WO_3粉体制得WN，其晶粒尺度为35nm，在常温下团聚后的二次平均粒度为6.4μm。

Results show that ammonia emission occurred within the first 6 days after fertilizer application, and it was less after the basal dressing and the first top-dressing than after the second top-dressing-N loss through ammonia emission accounted for 0.4%~12% of the total nitrogen applied for the basal and the first top dressings. However for the second top-dressing the percentage was 5.8%, 9.7%, 25.6%, 15.6%, 11.6% during the 2002 rice season, and 27.4%, 26.2%, 30.0%, 35.1%, 27.6% during the 2003 rice season for Treatments LN, OPT, LP, HP and HN, respectively.

结果表明，稻田氨挥发损失主要发生在施肥后6d内，基肥和第一次追肥后各处理氨挥发量占施氮量的0.4%~11.5%，而第二次追肥后氨挥发损失比例较大，对照、低氮、优化、低磷、高磷和高氮处理的氨挥发在2002年稻季分别占施氮量的5.8%、9.7%、25.6%、15.6%和11.6%，在2003年稻季则分别为27.4%、26.2%、30.0%、35.1%和27.6%。

Haber-Bosch process(Haber ammonia process,synthetic ammonia process):First economically feasible method of directly synthesizing ammonia from hydrogen gas and atmospheric nitrogen.

哈伯－博施法(亦称哈伯制氨法或合成氨法)：用氢和空气中氮直接合成氨的方法。

He and Nina moved to California and lived at 2005 Ivar Street, Apt.

他和Nina搬到加州，并在2005年伊瓦尔街，公寓生活。

Droperidol （ potently inhibits transfected HERGchannels and this is the probable mechanism for QT prolongation.

氟哌利多有效地抑制了转染的 HERG 钾通道，可能是 QT 间期延长的机制。