查询词典 ammonia

By the determination of different additives influence on the crystal rules of the potassium nitrate, the primary selection to methanol, alcohol, acetone and ammonia is carried out. The results show that the methanol and ammonia have the best separation effect.

通过测定不同浓度下甲醇、乙醇、丙酮、氨四种添加剂对硝酸钾结晶的影响规律，发现甲醇和氨对硝酸钾的析出效果最好，乙醇次之，丙酮最差。

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。

The experimental results indicate that the nitrite oxidizers are more sensi-tive to free ammonia than ammonia oxidizers in the wastewater.

结果表明，在高游离氨条件下，硝酸菌比亚硝化菌对游离氨更为敏感，反应体系中亚硝酸盐的平均积累速率远大于硝酸盐的平均积累速率。

Six strains of aerobic ammonia oxidisers and three strains of anaerobc ammonia oxidisers were isolated and their ability for ANAMMOX were proved.

从上述富集培养物中分离了6株好氧氨氧化菌和3株ANAMMOX菌，并证实它们都具有ANAMMOX能力。

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。

The ammonia electrochemical oxidation happened in the above five organic solvents, the ammonia oxidating peak partly overlap with the organic solvent own oxidation peak.

在THF中氨气的氧化峰很宽，峰电流很小。

The total amount of N loss through ammonia volatilization was N 0.37~3.04kg hm^(-2), accounting for1.31%~3.69% of the total N applied to Winter Radish The total N loss through ammonia volatilization enhanced with the increase in N application rate (p.05) and ex-pressed as y=0.1576e(superscript 0.0146x) and y=0.1826e(superscript 0.0112x) respectively.

不同施氮处理，春季累计氨挥发量为N0.67~5.16kg hm^(-2)，占施入肥料N的0.74%~2.24%；秋季累计氨挥发量为N0.37kg~3.04kg hm^(-2)，占施入肥料N的1.31%~3.69%。红壤旱地春秋二季氨挥发量均随施N量的提高而指数递增，其关系式分别为：y=0.1576e(上标 0.0146x)和y=0.1826e(上标 0.0112x)。

The test data indicate when the vapor mixtures with 82% ammonia at 120℃ passing through a molecular sieve module, the concentration of ammonia can be increased to 98%.Once the zeolite bed is saturated, the absorbed vapor is desorbed by microwave heating of the bed.

从目前的实验结果得到，在温度为120℃、压力为9 atm的条件下，通过分子筛后的氨气浓度从82%提高至98%左右，显示分子筛对於分离氨水混合蒸气有良好的效果。

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%。

The affection of aqua ammonia pressure and temperature and the furnace body temperature on the tar ammonia water separation effect was analysed.

讨论了炼焦过程中影响焦油产率的因素，从实践的角度就氨水压力、温度和炉体温度对焦油氨水分离效果作了分析研究，指出焦油氨水分离效果的好坏和炉体温度的操控直接影响产品煤气和焦油的产率。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。