查询词典 nitrogen

Furthermore, it's true that the nitrogen fertilize, remaining insectifuge and enduring organic pollution are increasing day after day.

氮肥污染、农药残留与持久性有机污染有所增加。

Despite their insolubility in many organic solvents, they are found to be soluble in nitrogen-containing solvents, such as DMF and pyridine.

这些化合物具有较好的稳定性，在胺类或其它含氮的有机溶剂中有较好的溶解度，如苯胺、二甲基甲酰胺或吡啶等。

The results show that the vertical flow wetland system can remove the total nitrogen to some extent,but instable.

结果表明：垂直流湿地对总氮有一定的净化效果，但稳定性较差。

This paper reviewed the progress in studies on the main non-halogen flame retardant systems for polypropylene cable insulant, emphatically introduced the development and application status of the typical flame retardants, such as organosilicon compound, nano-composite materials, metal hydroxide and phosphorus/ nitrogen intumescent flame retardant.

综述了用于无卤阻燃聚内烯电缆料的主要阻燃体系的研究进展，介绍了金属氧化物水合物体系、磷-氮膨胀型阻燃体系、有机硅复合体系和纳米复合材料阻燃体系的开发应用情况。

Interconversion between linear source resistivity and point source resistivity with the use of matrix method.;2. In the total discharge of point source wastewater,about 76% of nitrogen an.

对厦门市近岸海域近10年的废水和主要污染物质排放量估算的结果表明：万元产值工业废水排放量呈逐年下降的趋势，而各污染物的排放总量却逐年缓慢增长；在点源污水排放总量预测中，约76%的氮、磷来自于生活污水；在非点源污染负荷中，农业非点源中的氮、磷负荷占较大比例，城市非点源污染负荷比例最小。

In order to evaluate the restoration effect of cropping systems on continuous cropping soil, treatments of nitrogen-catching crop, rotation, and intercrop were adapted to study soil fertility and microbial indexes of the soil from an 8-year continuous cropping field using pot experiments. Fallow was used as a control. Cucumber yield were recorded.

为了评价栽培制度对连作障碍土壤的修复效果，采用盆栽方式，设置休闲、轮作、间作等处理，以生产中常用的栽培制度即夏季休闲的连作制度为对照，研究各处理对连作8年黄瓜的温室土壤生物修复效果及对后茬黄瓜产量的影响。

The influence of internal recycle ratio and influent loads on biological nitrogen removal was discussed.

结果考察工艺的启动挂膜性能以及硝化液回流比和进水负荷对脱氮效果的影响。

The influence of various factors on the efficiency of separation on ammonia nitrogen was investigated, including the surfactant dosage, the value of pH in the external phase, the concentration of sulfuric acid in the internal phase, the ratio between the volume of oil phase and the volume of water phase and so on.

用ME表面活性剂制作的乳液萃取冶金废水中的氨氮，考察了表面活性剂用量、外相水pH值、膜内相硫酸浓度、油内比、乳水比等因素对氨氮去除率的影响。

If it is supplied mainly by reduced nitrogen, the smaller cells would ultimately win in interspecific competition.

Eg.2 如果主要提供还原态氮，则较小的细胞将在种间竞争中占优势。

According to these results, it is considered that in the matrix of gray cast iron nitrogen solid-solubilizes as interstitial atom in the octahedron interstice of ferrite and cementite which is not occupied by carbon atom, and causes the crystal lattice of ferrite and cementite to distort, so that the micro-hardness of the matrix increases.

依据这一实验结果，作者认为，在灰铸铁基体组织中，氮以间隙原子的方式固溶在铁素体和渗碳体中未被碳原子占据的八面体间隙里，造成铁素体和渗碳体晶格畸变，从而提高了基体组织的显微硬度。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。