#descriptoroftheday #moleculardescriptors #qsar #cheminformatics #alvatips #chemsky
Valence vertex degree has been proposed in "Derivation and Significance of Valence Molecular Connectivity" doi.org/10.1002/jps....
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#descriptoroftheday #moleculardescriptors #qsar #cheminformatics #alvatips #chemsky
First Zagreb Index has been proposed in "Graph theory and molecular orbitals. Total φ-electron energy of alternant hydrocarbons" doi.org/10.1016/0009...
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#descriptoroftheday #moleculardescriptors #qsar #cheminformatics #alvatips #chemsky
Wiener Index has been proposed by Harry Wiener in (1947). Structural Determination of Paraffin Boiling Points. via
@pubs.acs.org doi.org/10.1021/ja01...
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New paper: Chandra, Banerjee & Roy (2026) used #alvaDesc descriptors to build ML/QSPR models for predicting log CMC of PFASs and surfactants, identifying key structural drivers and property cliffs.
Paper: pubs.acs.org/doi/full/10....
alvaDesc: alvascience.com/alvadesc/
#QSPR #QSAR #chemsky
#descriptoroftheday #moleculardescriptors #qsar #cheminformatics #alvatips #chemsky
Distance/detour ring indices have been described in Randić, M. (1997). On Characterization of Cyclic Structures. via @pubs.acs.org
doi.org/10.1021/ci97...
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#descriptoroftheday #moleculardescriptors #qsar #cheminformatics #alvatips #chemsky
The aromatic ratio is computed as the ratio of the number of aromatic atoms and the number of non-hydrogen atoms of the molecule.
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#descriptoroftheday #moleculardescriptors #qsar #cheminformatics #alvatips #chemsky
The aromatic ratio is computed as the ratio of the number of aromatic bonds and the number of non-hydrogen bonds of the molecule.
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You can also create custom standardizers tailored to your workflow.
🔗 alvascience.com/alvamolecule/
#Cheminformatics #DataCuration #QSAR
🎥 Video Highlight: Standardizing Molecular Datasets with alvaMolecule
alvaMolecule provides 16 predefined standardizers to correct molecular representations, remove unwanted features, and normalize structures.
▶️ youtube.com/watch?v=Zy03...
#Cheminformatics #DataCuration #QSAR
#descriptoroftheday #moleculardescriptors #qsar #cheminformatics #alvatips #chemsky
The normalised number of ring systems is computed as the ratio of the number of ring systems to the cyclomatic number of the molecule.
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New in Chemosphere (Das et al., 2026): a PLS-based q-RASAR model predicts acute oral LD50 for 614 chemicals using 2D descriptors from alvaDesc + read-across similarity.
🔗 Paper doi.org/10.1016/j.ch...
🔗 alvaDesc alvascience.com/alvadesc/
#QSAR #Toxicology #Cheminformatics #chemsky
#descriptoroftheday #moleculardescriptors #qsar #cheminformatics #alvatips #chemsky
Number of ring systems has been described in "Property Distributions: Differences Between Drugs, Natural Products, and Molecules..." doi.org/10.1002/chin...
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#descriptoroftheday #moleculardescriptors #qsar #cheminformatics #alvatips #chemsky
Ring Complexity Index has been proposed in "An Algorithm for the Perception of Synthetically Important Rings" doi.org/10.1021/ci60...
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A strong example of alvaDesc + interpretable ML accelerating inhibitor discovery.
🔗 alvascience.com/alvadesc/
#Alvascience #alvaDesc #MachineLearning #Corrosion #QSAR #moleculardescriptors #cheminformatics #machinelearning
#descriptoroftheday #moleculardescriptors #qsar #cheminformatics #alvatips #chemsky
Molecular Cyclized Degree has been proposed in "Implementing the Fisher’s Discriminant Ratio in a k -Means Clustering Algorithm..." doi.org/10.1021/ci03...
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#descriptoroftheday #moleculardescriptors #qsar #cheminformatics #alvatips #chemsky
The cyclomatic number is the minimum number of edges to be removed from a graph in order to remove all its cycles and gives the cardinality of the SSSR.
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#descriptoroftheday #moleculardescriptors #qsar #cheminformatics #alvatips #chemsky
MWcorr is a modified version of molecular weight designed to better correlate with the McGowan volume when working with halogenated compounds.
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🔬 New study (Mizuno et al., 2026) combining alvaDesc molecular descriptors with mechanism-based in vitro assays to improve read-across prediction of rat thyroid carcinogenicity.
📖 Paper: doi.org/10.1016/j.fc...
🔗 alvaDesc: alvascience.com/alvadesc/
#alvaDesc #ReadAcross #QSAR #NAMs #chemsky
#descriptoroftheday #moleculardescriptors #qsar #cheminformatics #alvatips #chemsky
The total charge, also know as Electronic Charge Index (ECI) has been described in "Amino Acid Side Chain Descriptors for..." doi.org/10.1021/jm00...
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High-risk pollutants such as TCDD and Chlorpyrifos were consistently identified.
A strong example of descriptor-based, interpretable QSAR supporting ecological risk assessment.
📖 Paper: doi.org/10.1016/j.en...
🔗 alvaDesc: alvascience.com/alvadesc/
#Alvascience #alvaDesc #QSAR
Five key shared descriptors (P_VSA_LogP_5, R8s, ATS4m, Eta_betaS_A, BLTA96) captured hydrophobicity, topology, symmetry, and baseline toxicity, improving cross-species generalization under data-limited conditions.
#toxicity #Ecotoxicology #insilico #machinelearning #cheminformatics #QSAR
#descriptoroftheday #moleculardescriptors #qsar #cheminformatics #alvatips #chemsky
Fsp3 is a complexity index, also known as aliphatic indicator (i_ali) has been proposed in doi.org/10.1002/qsar... and doi.org/10.1021/jm90...
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#descriptoroftheday #moleculardescriptors #qsar #cheminformatics #alvatips #chemsky
Graph density represents the ratio between the number of bonds and the number of all possible bonds in a graph.
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#descriptoroftheday #moleculardescriptors #qsar #cheminformatics #alvatips #chemsky
Rotatable Bond Fraction is calculated as the ratio between the number of rotatable bonds and the total number of bonds of a molecule.
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Using alvaDesc, the authors calculated thousands of 2D descriptors for PCA, drug-likeness analysis, and SAR interpretation, supporting docking and pharmacophore studies targeting PI3Kα.
🔗 alvascience.com/alvadesc/
#alvaDesc #Cheminformatics #DrugDiscovery #QSAR #chemsky
#descriptoroftheday #moleculardescriptors #qsar #cheminformatics #alvatips
Coulomb matrix has been proposed by
@profvlilienfeld.bsky.social et al. in "Fast and accurate modeling of molecular..." doi.org/10.1103/Phys... via @physrevlett.bsky.social
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Discovery of Niclosamide Analogs with Potent Mitochondrial Uncoupling Activity and Reduced Mitochondrial Inhibition–Associated Toxicity
pubs.acs.org/doi/10.1021/...
#KellyChibale #MedicinalChemistry #CancerResearch #MitochondrialBiology #OncologyResearch #DrugDiscovery #QSAR
In a few minutes, see how to:
✔ Load molecules
✔ Generate 3D coordinates
✔ Calculate descriptors & fingerprints
✔ Analyze and export results
🔗 Learn more:
www.alvascience.com/alvadesc/
#Alvascience #alvaDesc #QSAR #Cheminformatics #MolecularDescriptors #chemsky
#descriptoroftheday #moleculardescriptors #qsar #cheminformatics #alvatips
Barysz matrix has been proposed in "QSAR Comparative Study of Wiener Descriptors for Weighted Molecular Graphs" doi.org/10.1021/ci00... @pubs.acs.org
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#descriptoroftheday #moleculardescriptors #qsar #cheminformatics #alvatips
Burden matrix has been proposed in Burden, F. R. (1989). Molecular identification number for substructure searches. via
@pubs.acs.org
doi.org/10.1021/ci00...
Check #alvaDesc at: alvascience.com/alvadesc/
