Artículos de revistas
A Study Of Octanol/water Partition Coefficient Of Polychlorinated Biphenyls (pcbs) Using Topological Indices [estudo Do Coeficiente De Partição Octanol-água De Bifenilas Policloradas (pcbs) Utilizando Parâmetros Topológicos]
Registro en:
Quimica Nova. , v. 26, n. 3, p. 312 - 318, 2003.
1004042
2-s2.0-0037705417
Autor
Da Silva L.R.
Ferreira M.M.C.
Institución
Resumen
A model based on chemical structure was developed for the accurate prediction of octanol/water partition coefficient (Kow) of polychlorinated biphenyls (PCBs), which are molecules of environmental interest. Partial least squares (PLS) was used to build the regression model. Topological indices were used as molecular descriptors. Variable selection was performed by Hierarchical Cluster Analysis (HCA). In the modeling process, the experimental Kow measured for 30 PCBs by thin-layer chromatography - retention time (TLC-RT) has been used. The developed model (Q2 = 0,990 and r2 = 0,994) was used to estimate the log Kow values for the 179 PCB congeners whose Kow data have not yet been measured by TLC-RT method. The results showed that topological indices can be very useful to predict the Kow. 26 3 312 318 Rachdawong, P., Christensen, E.R., (1997) Environ. Sci. Technol., 31, p. 2686 Ballschmiter, K., Zell, M., (1980) Fresenius' J. Anal. 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