نتایج جستجو برای: z descriptors

تعداد نتایج: 165797  

In this work the electrooxidation half-wave potentials of some Benzoxazines were predicted from their structural molecular descriptors by using quantitative structure-property relationship (QSAR) approaches. The dataset consist the half-wave potential of 40 benzoxazine derivatives which were obtained by DC-polarography. Descriptors which were selected by stepwise multiple selection procedure ar...

The antioxidant properties of coumarin derivatives using the 2,2ˈ -diphenyl-1- picrylhydrazyl (DPPH) radical scavenging assay were investigated by the application of Quantitative Structure Activity Relationship (QSAR) studies. The molecular structures were optimized and submitted for the generation of quantum chemical and molecular descriptors. Genetic Function Algorithm (GFA) was employed in m...

2013
Matthias Dehmer Frank Emmert-Streib Shailesh Tripathi

Molecular descriptors have been explored extensively. From these studies, it is known that a large number of descriptors are strongly correlated and capture similar characteristics of molecules. In this paper, we evaluate 919 Dragon-descriptors of 6 different categories by means of clustering. Also, we analyze these different categories of descriptors also find a subset of descriptors which are...

2010
Gerard J. P. van Westen Jörg K. Wegner Adriaan P. IJzerman Herman van Vlijmen Andreas Bender

The early phases of drug discovery use in silico models to rationalize structure activity relationships, and to predict the activity of novel compounds. However, the performance of these models is not always acceptable and the reliability of external predictions both to novel compounds and to related protein targets is often limited. Proteochemometric modeling [1] adds a target description, bas...

Journal: :journal of physical & theoretical chemistry 2009
z. bayat j. movaffagh

it is important to determine whether a candidate molecule is capable of penetrating the plasma-brain barrier indrug discovery and development. the aim of this paper is to establish a predictive model for plasma-brainbarrier penetration using simple descriptors the usefulness of the quantum chemical descriptors, calculated atthe level of the dft and he theories using 6-310* basis set for qsar st...

Journal: :Journal of chemical information and computer sciences 2002
Viviana Consonni Roberto Todeschini Manuela Pavan Paola Gramatica

In a previous paper the theory of the new molecular descriptors called GETAWAY (GEometry, Topology, and Atom-Weights AssemblY) was explained. These descriptors have been proposed with the aim of matching 3D-molecular geometry, atom relatedness, and chemical information. In this paper prediction ability in structure-property correlations of GETAWAY descriptors has been tested extensively by anal...

2009
Marcelo F. Caetano Xavier Rodet

There has been a great collective effort in the search for perceptually meaningful sound transformation techniques. The transformation of sounds matching target sound descriptors is a promising candidate because the descriptors are thought to capture timbral dimensions corresponding to relevant perceptual features. However, matching the descriptors alone is not enough because there are a large ...

Journal: :International Journal of Computing and Digital Systemss 2017

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