A recent study highlights how in silico workflows can accelerate the search for new Ebola virus glycoprotein inhibitors. In this work, #alvaDesc supported the #QSAR stage through molecular descriptor calculation.

Paper: doi.org/10.3390/ijms...
AlvaDesc: alvascience.com/alvadesc/

#chemsky

#descriptoroftheday #moleculardescriptors #qsar #cheminformatics #alvatips #chemsky

Kupchik vertex degree has been proposed in "Molar Refraction Relationships of Alkylgermanes Using Molecular Connectivity" doi.org/10.1002/qsar...

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Second Zagreb Index

#descriptoroftheday #moleculardescriptors #qsar #cheminformatics #alvatips #chemsky

Second Zagreb Index has been proposed in "Graph theory and molecular orbitals. XII. Acyclic polyenes" The Journal of Chemical Physics doi.org/10.1063/1.43...

Check #alvaDesc at: alvascience.com/alvadesc/

#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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Advances in the applications of machine learning for cosmetic formulation development - Chemical Papers Chemical Papers - Machine learning (ML), a core branch of AI, enhances efficiency, accuracy, and systematization in cosmetic formulation development through advanced data processing and analytical...

Machine learning is reshaping cosmetic formulation development, from ingredient screening and QSAR/QSPR modeling to quality control and personalization. This review highlights the opportunities and the challenges

Paper: doi.org/10.1007/s116...
alvaDesc: alvascience.com/alvadesc/

#chemsky #alvaDesc

#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...

Check #alvaDesc at: alvascience.com/alvadesc/

🔗 Explore alvaDesc and see how it can support your cheminformatics and QSAR workflows: alvascience.com/alvadesc/

#Cheminformatics #QSPR #RASPR #Antioxidants #FoodChemistry #Nutraceuticals #alvaDesc #Alvascience

New in Food Chemistry (Kumar et al., 2026): a similarity-augmented q-RASPR model predicts antioxidant activity from DPPH data (1911 molecules) and screens ~70,000 food compounds from FooDB using 2D descriptors from alvaDesc.

📄 Paper: doi.org/10.1016/j.fo...

#alvaDesc #QSPR

#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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Development of stacked ensemble models for estimating the physicochemical properties of organic chemicals - Structural Chemistry Structural Chemistry - The physicochemical properties of chemicals are essential for understanding their behaviour within biological systems and their environmental impacts. With the rapid increase...

📢 New Publication | Stacked Ensemble QSPR Models for Physicochemical Properties

Using a large and diverse dataset of 14,207 chemicals and descriptors calculated with #alvaDesc.

🔗 Paper: doi.org/10.1007/s112...
🔗 alvaDesc: alvascience.com/alvadesc/

#QSPR #MachineLearning #chemsky

#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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#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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🔥 ML-guided design of flame-retardant polyurethane foams (Sun et al., 2026).

Using 800 #moleculardescriptors from #alvaDesc + formulation data, an #XGBoost model predicted LOI with R² = 0.84.

📖 Paper doi.org/10.1016/j.po...
🔗 alvaDesc: alvascience.com/alvadesc/

#cheminformatics #chemsky

#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

🌍 New publication using alvaDesc in Environment International (2026)

Wang et al. developed interpretable multi-species QSAR models to predict aquatic toxicity across five native species, using 5,305 molecular descriptors calculated with alvaDesc.

#alvaDesc #moleculardescriptors #paper

#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...

Check #alvaDesc at: alvascience.com/alvadesc/

#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.

Check #alvaDesc at: alvascience.com/alvadesc/

Molecular Descriptors-Based Analysis for Computation of Polyurethane Melting Temperature - Multiscale Science and Engineering Multiscale Science and Engineering - Polyurethane (PU) is a highly popular polymer used in several industrial spheres, the thermal and mechanical functioning of which is determined most important...

New study using #alvaDesc & #alvaModel to predict polyurethane melting temperature (Tm) via #QSPR
5,600+ descriptors tested; PLS delivered the best performance, supporting fast, cost-effective polymer design.

📖 doi.org/10.1007/s424...
🔗 alvascience.com/alvadesc/

#Polymers #cheminformatics #chemsky

#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.

Check #alvaDesc at: alvascience.com/alvadesc/