It is proved that the method of selection modificators by chemical bond parameter is suitable to the study of Cr cast iron.
证明了用键参数函数选择变质剂的方法也适用于中铬铸铁的研究。
The selection principal of low toxic mixed solvent of CR adhesive is depended upon hydrogen bond index and solubility parameter of the solvent.
氯丁胶粘剂的低毒混合溶剂的选择原则是：根据溶剂的氢键指数及溶解度参数。
By using the inductive effect index I as a characteristic bond-parameter, a formula is given describing the relation between the structure of N-nitrosamines and its acute toxicity.
亚硝胺类化合物的结构与毒性之间存在着一定的相互关系。用诱导效应指数I作为结构的特征键参数可以得到烷基亚硝安的结构与毒性的定量关系。
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