氨氮

Four sheep with ruminal and duodenal cannulas were used in a 4×4 Latin square design to study the effects of rumen protected fat on the function of rumen metabolize.

选择体重相近并安装有瘤胃瘘管和十二指肠瘘管的小尾寒羊4只，采用4×4拉丁方实验设计方法，研究了脂肪酸钙、植物脂肪粉和硬脂肪对绵羊瘤胃PH、氨氮浓度、采食量、营养物质消化率、血液生化指标以及瘤胃营养物质降解率的影响。

Porous chitosan membranes were prepared with different amount of dibutyl phthalate as porougen and characterized by IR spectrum.

以邻苯二甲酸二丁酯为致孔剂，制备了多孔壳聚糖膜，研究了多孔壳聚糖包膜对尿素的包膜及包膜尿素对氨氮的缓释溶出并经红外光谱表征。

As the raise of ammonia-N concentration, survival rate and daily growth of unexuviated larvae decreased gradually, while the metamorphosis rate and daily growth of exuviated larvae increased gradually firstly and then decreased. As the raise of sulfureted hydrogen concentration, all the parameters measured decreased gradually.

在本试验浓度范围内，随着氨氮浓度的升高，三疣梭子蟹各期幼体存活率和未变态个体的日生长率都逐渐降低，变态率和变态个体的日生长率则先逐渐升高，达到一个峰值后又逐渐降低；随着硫化氢浓度的升高，三疣梭子蟹各期幼体存活率和日生长率A均呈现逐渐降低趋势，变态率和日生长率B也逐渐减小。

The macrobenthos are an important constituent in the estuarine and tidal flat ecosystem that play a key role in the cycling of nutrient in the ecosystem.

因此，氨氮的再生对维持长江河口滨岸潮滩生态系统的高生产力和高生物量具有重要的生态意义。

A low cost process for municipal wastewater treatment using a new porous concrete eco-film membrane biological bed was studied. The system operated with inflowing continuously and recycling partly. The results showed that the removal efficiency of CODcr, BOD5, NH3-N and TP was 82％, 84％, 83% and 33%, respectively.

采用新型低成本渠式透水混凝土生态膜反应床处理城市污水，以连续进水，部分回流的方式运行，对CODcr、BOD5、氨氮和TP的去除率分别为82％、84％、83％和33％。

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。

HRT had little effect on organic and ammonia removals when it was changed from 2 to 4h.

当HRT在2-4h时，HRT对有机物和氨氮的去除效果影响很小。

The Hach 2100P is used to test for ammonia, nitrites, turbidity and phosphates

Hach 2100p 是用来测试氨氮，亚硝酸盐，浊度和磷酸盐。

This Waste water containing tar, phenol, ammonia, cyanide, benzene, pyridine, quinoline and indole dozens of other pollutants, it is very complex and is high concentrations of pollutants, it is color, toxicity and stable, after biological treatment,there are still a large number of non-degradable organic pollutants, it is a typical example of intractable industrial wastewater.

焦化废水是煤在高温干馏过程中以及煤气净化、化学产品精制过程中形成的废水，其中含有焦油、酚、氨氮、氰、苯、吡啶、吲哚和喹啉等几十种污染物，其水量大，成分复杂，污染物浓度高、色度高、毒性大，性质稳定，经生化处理后，仍有大量难降解的有机污染物，是一种典型难处理的工业废水。

Aerobic leachate recirculated landfill appears to be the most effective option in the removal of organic matter and ammonia.

好氧渗滤液循环垃圾在移除有机物和氨氮上似乎最有效。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。