氮的

The results showed that the grain yields of all varieties increased significantly with the increase of nitrogen application.

结果表明：随着施氮量的增加各品种的产量都有所提高，提高的幅度与品种对氮的敏感性有关。

Such a regularity indicates that nitrogen isotope abundance could serve as a sensitive indicator in evaluating the plant decomposition degree and the total nitrogen level and potential in soil.

氮的同位素自然丰度组成对于植物分解程度的灵敏响应，使其可以作为一种指示植物-土壤体系中氮素转化程度与趋势以及评估土壤中氮的有效性的指标，应用于自然生态研究。

In aluminothermic reduction and nitridation, the reaction speed increases with the temperature, the optimum temperature is 1460℃.

严格控制反应条件，产物的氮含量可达到22.0wt％（对于z=3的β'-Sialon，氮的理论含量为24.7wt％，此转化率在有关天然原料合成β'-Sialon粉体的报道中目前是最高值。

As a kind of low-priced nonmetallic mineral, zeolite has good selective adsorption ability for NH4＋-N. Modifying can even increase this capacity. Clinoptilolite and mordenite have much applying prospect in this aspect. The research on NH4＋-N removal with natural zeolite is sufficient in many countries.

沸石是一种廉价的非金属矿物，对氨氮具有较高的选择吸附性，通过改性处理能大大提高其对氨氮的去除能力，特别是斜发沸石和丝光沸石在这方面有很好的应用前景。

The effect of PPC preoxidation on nitrification was conducted by measuring the quantity of nitrite bacteria and nitrate bacteria ,nitrosification performance and nitrification performance in the BAC process.

结果表明，高锰酸盐预氧化后的生物活性炭与单独生物活性炭上亚硝酸菌和硝酸菌的分布具有相同规律；但高锰酸盐预氧化后生物活性炭工艺中亚硝酸菌和硝酸菌数量、亚硝化速度及硝化速度都要高于单独的生物活性炭，这是高锰酸盐促进后续生物活性炭工艺去除氨氮和亚硝酸盐氮的主要原因

On the normotensive rat, bilateral microinjection of L-arginine (16 n mol/0.1 ul/site), a precursor of nitric oxide into the rVLM, caused a decrease in BP, HR and the pressor response induced by the dPAG stimulation, while microinjection of NG-methyl-Larginine (L-NMMA, 16 n mol/0.1 ul/site), a blockade for NO to form, into the rVLM bilaterally, caused an increase in BP, HR and the pressor response induced by the dPAG stimulation. There was no effect of both drugs mentioned above on the tachycardiac response induced by the dPAG stimulation.

五、在正常血压大鼠，于双侧rVLM微量注射一氧化氮前体(16nmol/0.1μl/site)可引起BP降低、HR减慢、以及电刺激dPAG诱发的防御性升压反应减弱；而于同区微量注射生成一氧化氮的拮抗剂N〓-甲基-L-精氨酸(16nmol/0.1μl/site)则可引起BP升高、HR加快、以及电刺激dPAG诱发的防御性升压反应增强；而上述两药对电刺激dPAG诱发的防御性加快心率反应均无明显作用。

Na-alginate was selected as an entrapping agent to immobilize ammonia-oxidizing bacteria in this experiment, designed to explore optimal entrapping condition and to compare immobilized bacteria with non-immobilized bacteria in ammonium removal efficiency.

以海藻酸钠作为氨氧化细菌的包埋固定载体，以固定化氨氧化细菌对氨氮的去除率为主要指标，研究氨氧化细菌的最佳包埋条件，并比较了未固定细胞与固定化细胞两种处理对水中氨氮去除效果的影响。

Microbial biomass carbon and microbial biomass nitrogen, respiration CO2 and mineralized nitrogen in plant straw fertilized soil were determined under laboratory incubation conditions of constant temperature and moisture based on field above- ground yields of intercropped sweet maize straw and white clover straw.

根据田间甜玉米／白三叶草套种各作物的秸秆产量，在恒温恒湿条件下进行室内培养，探讨秸秆不同方式还田后土壤微生物量碳、微生物量氮、呼吸产生的CO2和矿化产生的无机氮的变化规律。

The adsorption of NH〓 in the 〓CO〓 solution and the adsorption of NH〓-N in the waste water from the Coking plant,Capital Iron and Steel Coripo ration by bentonite were investigated. The results show that the amount of 〓 adsorbed by particulate betonite (〓1. 68mm) and -200 mesh bentonite are 26. 39 and 8. 87mg/g, respectively; and the amount of NH〓-N in the waste water from the coking plant adsoybed by particulate bentonite, acid activated bentonite and -200 mesh bentonite are 32. 00, 21. 85 and 15. 62mg/g, respectively.

对膨润土吸附溶液中的 NH〓离子和从首钢公司焦化厂焦化废水中去除氨氮进行的试验研究结果表明，该膨润土对碳酸铵溶液中 HN〓离子的饱和吸附量是颗粒膨润土26.39mg/g、粉状膨润土8.87mg/g；对焦化废水中氨氮的饱和吸附量是颗粒膨润土32.00mg/g、活性膨润土21.85mg/g和粉状膨润土15.62mg/g。

However, many of the researches have concentrated on the areas with higher application of water and nutrients. There is limited information available on the uptakes, accumulations and translocation of nitrogen for the different varieties on dryland regions of China.

但应该看到，这些研究工作多集中在水肥条件供应充足的地区，对于旱地不同小麦品种对氮的吸收、转运，以及不同施氮水平下不同品种的氮素营养特性及诊断的研究尚待深入。

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。