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1)  nitrogen or oxygen contents
氮、氧元素
2)  nitrogen element
氮元素
1.
During the combustion process of coal, the nitrogen element in coal may turn to various oxides of nitrogen, thereby, resulting in ambient pollution.
煤中氮元素在煤燃烧过程中会转化为各种氮的氧化物,从而造成环境污染。
2.
Analysis by EPMA shows that the peak value of distribution of nitrogen element inside the pure iron with ion RE-nitridation is about 100 μm deeper than that with ion nitridation.
采用辉光放电离子溅射法成功地将稀土元素Ce,La和氮元素以较高浓度渗入纯铁。
3)  nitrogen [英]['naɪtrədʒən]  [美]['naɪtrədʒən]
氮元素
1.
Research Progress of Nitrogen Transformation in Water Eco-environment
氮元素转化规律在生态水环境中的研究进展
2.
By analyzing the content of nitrogen, sulfur and lead in leaves of plants in every function district of Nanjing city, the index of air environment pollution of plants was studied, and the relationship between seasonal changes of the content of nitrogen, sulfur and lead in leaves of plants and air environment pollution of the city was discussed.
结果表明,植物叶片中,硫、铅元素的含量随季节变化不断增加,而氮元素含量相应减少;各功能区的硫、铅元素含量明显高于清洁对照区;用植物污染指数可以综合评价大气环境的质量状况。
3.
The nitrogen cycle is closely related to the ecological environment.
通过对长白山圆池4个泥炭剖面样品的分析,揭示了其氮元素分布规律。
4)  nitrogen group elements
氮族元素
5)  Nutritional Character
氮磷钾元素
1.
Study on Nutritional Character of Rape and Potassium Fertilizer Application Effect;
油菜氮磷钾元素的需肥规律和施肥研究
6)  Nitrogen element of soil
土壤氮元素
补充资料:氮族元素
分子式:
CAS号:

性质:元素周期表中第15族(VA)元素。包括氮(N)、磷(P)、砷(As)、锑(Sb)、铋(a)。其中氮、磷是非金属元素;砷、锑是准金属元素;铋是金属元素。元素原子的电子构型为ns2np3。性质呈现出由典型的非金属变为金属的周期性递变规律。

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