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Estudio de la Relación Cuantitativa Estructura-actividad de Pesticidas Mediante Técnicas de Clasificación

Translated title of the contribution: Study of the Quantitative Structure-activity Relationship of Pesticides Using Classification Techniques
  • Fernando Rene Cardenas Alvarez
  • , Piercosimo Tripaldi
  • , Cristian Rojas

Research output: Contribution to journalArticle

Abstract

The objective of this work was the comparison between nearest neighbor classification methods (κ-NN) and counterpropagation artificial neural networks (CP-ANN) to model the toxicity of a set of 192 organochlorine, organophosphorus, carbamate and pyrethroid pesticides, measured as Effective Concentration (EC50) and which were divided into three classes, i. e., low, intermediate and high toxicity. A total of 4885 molecular descriptors were calculated using the DRAGON program, which were simultaneously analyzed using the κ-NN method coupled with the Genetic Algorithms variable selection technique (GA-VSS). The models were appropriately validated by means of a prediction subset. The results clearly suggest that the 3D descriptors do not provide relevant information for modeling the classes. On the other hand, κ-NN shows better results than CP-ANN.
Translated title of the contributionStudy of the Quantitative Structure-activity Relationship of Pesticides Using Classification Techniques
Original languageSpanish (Ecuador)
Pages (from-to)1-11
Number of pages11
JournalAvances en Ciencias e Ingenierías
Volume6
Issue number6
DOIs
StatePublished - 19 Dec 2014

Keywords

  • Cp-ann
  • Ga-vss
  • K-nn
  • Pesticides
  • qsar theory

CACES Knowledge Areas

  • 215A Biochemistry

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