摘要
基于分子拓扑邻接矩阵的分子形状指数mK及电性拓扑状态指数Ef,计算了29种取代芳烃的Kier指数.通过多元线性回归法,建立了拓扑指数与取代芳烃抑制黄瓜种子发芽率的毒性pC50的定量结构-活性相关模型,该模型相关系数R2为0.874,标准偏差S为0.116,计算值与实验值基本吻合.经Jack-knife逐一剔除法检验,所建模型具有良好的预测能力与稳健性.利用该模型探讨了取代芳烃抑制黄瓜种子发芽的毒性机理,证明这些化合物属于极性麻醉或反应性毒物.
Kier's shape indices of 29 substituted aromatic molecules were calculated based on the adjacency matrix of the molecular topology and the electrotopological state indices in this paper. A quantitative structure-activity relationship was developed between the topological indices and the inhibition phytotoxicity (pC50) of 29 benzene deriva- tives on seed germination rate of cucumis sativus using multiple linear stepwise regression. The correlation coefficient and the standard deviation of this model are 0. 874 and 0. 116, respectively. The calculated values of the pC50 based on this model is in accordance with their corresponding experimental values. It is verified, using leave-one- out of the Jackknifed method, that the model is predictable and robus. On the basis of the model, the mechanism of the toxicity of aromatic molecules on seed germination to polar narcotic and reactivity toxicants. rates has been studied. It shows that these compounds belong
出处
《深圳大学学报(理工版)》
EI
CAS
北大核心
2010年第2期205-210,共6页
Journal of Shenzhen University(Science and Engineering)
基金
国家自然科学基金资助项目(20776149)
徐州工程学院培育基金资助项目(XKY2008313)
关键词
计算化学
构效关系
分子形状指数
电性拓扑状态指数
取代芳烃
黄瓜种子发芽率
computational chemistry
quantitative structure-property/activity relationship
molecular shape index
electrotopological state index
substituted aromatic compound
seed germination rate of cucumis sativus