The element composition of CN is analyzed by X ray electron energy spectrum ( XPS ).

用X光电子能谱 ( XPS ) 分析了氮化碳的元素组成.

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Objective Research element composition of producing power in foundry work and quarry work.

调查研究某铸造作业和采石作业生产性粉尘成分的元素含量.

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Objective: To analyse the fatty acid and trace element composition and antioxidant capacity of Trionyx sinensis.

摘要: 目的研究甲鱼脂肪酸和微量元素组成及含量特点,揭示其抗氧化作用效果.

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