运用XPS分析方法研究一系列复合氧化物催化剂中毒前后硫在其表面的各种形态及催化剂活性组分中毒前后的组成、价态、化学机理及其变化。
By using XPS, before and after the intoxication of mixed oxide catalysts, the various appearance and the composition. valence and chemical mechanism of the active component of catalysts were studied.
昆虫对寄主植物的识别是由于识别了植物气味的由一定组分、按照严格比例组成的化学指纹图。
Host recognition of insect is the result of perception of the chemical spectrum which constructed from definite chemical components and ratios.
本文在前文的分子模型基础上，提出了似化学局部组成的基团模型，可用于极性分子混合物申组分活度系数的预测。
Based onthe molecular QCLC model, a group contribution quasi-chemical local composition model is proposed, in which polar molecule is divided into several non-polar functional groups.
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