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 or oxygen contents
氮、氧元素
5) platinum group element
铂族元素
1.
Neutron activation analysis or platinum group elements in geological materials;
地质样品的铂族元素中子活化分析研究
2.
Two Co-rich seamount crust reference materials(MCPt-1 and MCPt-2) for platinum group elements(PGEs) with ultra-fine particle size were prepared.
2个富钴结壳铂族元素(PGEs)标准物质MCPt-1和MCPt-2的原样分别由中国和俄罗斯取自中太平洋海山和西太平洋麦哲伦海山区。
6) platinum group elements
铂族元素
1.
Comparison of platinum group elements (PGE) between Jianchaling and Jinchuan nickel sulfide deposits and its significance;
煎茶岭与金川硫化镍矿床的铂族元素地球化学特征对比及其意义
2.
Geochemical characteristics of Platinum group elements of the sulfide nickel ores and related rocks in Jianchaling, Lueyang county, Shannxi province, China and their implication for genesis;
煎茶岭硫化镍矿床的铂族元素地球化学特征及其意义
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。
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。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条