氮

The materiel balance of Nitrogen and Phosphorus in the static examination shows: In eliminating of the nitrogen, Ipomea aquatica absorbing and the artificial medium nitrify contributing up to 31.8% and 38.7%; in eliminating the phosphorus, the contribution that Ipomea aquatica absorbing is 26.7%.

静态运行条件下的氮磷物料衡算显示：在总氮的去除中，空心菜吸收及人工介质反硝化的贡献分别达到了31.8%、38.7%；在总磷的去除中，空心菜吸收的贡献为26.7%。

Yield components showed that number of effective pods per hectare was more important than 1000 seeds weight and number of seed per pod.

3随密度和施氮量增加，单位面积有效角果数呈先增后减的趋势。千粒重与施氮量关系密切，但过量施氮则降低千粒重。

The methods of improving t he high-temperature-properties and fracture toughness of silicon nitride ceram ics,as well as its research and development prospect are also discussed in this paper.

本文着重介绍了氮化硅陶瓷的制备工艺、提高氮化硅陶瓷高温性能的方法以及改善其断裂韧性的途径，并展望了氮化硅陶瓷的研究前景。

At intraspecific level,leaf N decreased with increase of altitude,while leaf P showed no clear pattern along altitude.Leaf N was significantly positively related to mean annual air temperature(r=0.616**),but negatively related to soil water content(r=-0.640**).

叶片氮含量与年均气温呈显著正相关关系(r=0.616**)，与土壤水分呈显著负相关关系(r=-0.640**)，与土壤有机质、全氮均呈显著负相关关系(r=-0.591**，r=-0.564**)；叶片磷含量与年均温、土壤水分之间的关系不显著；叶片氮、磷之间的比率为10.2。

Nearly all the isolates were likely to utilize NZ amine, sodium acetate, sodium propionate and Tween-80, but potassium nitrate and sodium benzoate, sodium succinate, sodium citrate occurred with different strains.

所有参试菌株能很好地利用乙酸钠、丙酸钠和丙酮酸钠，但对其它有机酸的利用各不相同。大多数菌株能利用酪蛋白、牛肉膏等有机氮，一些菌株可利用氨态氮和硝态氮。

The effect of N forms and Ratios on iron nutrition in hydroponically grown lettuce were investigated. It was found that suitable ratioNO3--N:NH4+-N:CO(NH22 =6:6:0 in nutrient solution can significantly promote plant growth, raise chlorophyll content, improve plant iron utilization efficiency, and reduces nitrate content accumulation in leaves, and the cost of nutrient solution was thus reduced.

硝态氮、氨态氮与酰胺态氮及其不同配比对水培油菜铁素营养的影响试验，结果表明，不同形态氮素显著影响植物的铁素营养状况，NO_3~--N：NH_4~--N：CO(NH_2)_2为6：6：0的处理比单一NO_3~--N使用处理，能促进水培油菜生长，提高叶绿素含量，增加植物体内铁的活性，降低叶片中硝酸盐含量的积累，降低营养液成本。

To obtain high cell density and high yield of MTG by Streptomyces hygroscopicus, the effects of exponential feeding of glucose and the addition of nitrogen source on MTG production were investigated.

在吸水链霉菌分批发酵研究的基础上，通过在菌体生长阶段指数流加葡萄糖，进行高细胞密度培养，获得了较高的菌体量；待菌体生长进入产酶期后，通过补加氮源，为产酶提供充足的氮源，其中通过流加蛋白质氮源，可以减少蛋白酶对成熟MTG的分解，促进产酶。

Nitrogen content increase by several times in Changjiang River and its estuary Over the past 40 years has been a major concern of oceanographers home and abroad.

1997年 1 1— 1 2月，1 998年 8月和 1 0月，对长江从金沙江至河口干流和主要支流、湖泊入江口总氮、总溶解氮、总有机氮等进行调查。

Super hybrid rice Gangyou 527 was used to investigate the effects of three irrigation regimes(submerged irrigation, dry cultivation, the treatment W2 that damp irrigation before booting stage, shallow irrigation at booting stage, wetting-drying alternation irrigation from heading stage to mature stage) and different amounts of N application on photosynthetic rate, activities of nitrate reductase, glutamine synthetase, glutamate synthase, endopeptidase in flag leaves, bleeding intensity in basal internodes and grain yield during grain filling, and studied correlations among the photosynthesis, nitrogen metabolism enzyme activity and root vigor at this stage.

以超高产杂交稻冈优527为材料，通过淹水灌溉、湿润灌溉＋浅水灌溉＋干湿交替灌溉（W2处理）和旱种3种灌水处理及不同的施氮量，研究水氮互作对结实期水稻剑叶光合特性、氮代谢关键酶及根系活力等生理性状和产量的影响，并探讨各生理指标间的相互关系。

The Haber process provided a new supply of "fixed" nitrogen to make fertilizers that are now responsible for sustaining one-third of the world's population.

哈勃过程开始于氮元素的一种非固定状态（氮气，这种状态下的氮元素是不容易被利用的），或者其他形式的包含氮元素的气体如氮氧化物。

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。