## Which is a molecular descriptor for QSAR?

A molecular descriptor is a structural or physicochemical property of a molecule or part of a molecule. A QSAR model for predictive toxicology is a mathematical relationship between a chemical’s quantitative molecular descriptors and its toxicological endpoint [9,44].

## What is molecular descriptors in drug design?

Molecular descriptors are readily calculated from the chemical structure and provide an abundance of chemical and physical information about the compounds [42-48]. Molecular descriptors are generally correlated with structure-activity relationships, which are expected to include a compound’s ability to obtain a charge.

**What is the meaning of QSAR?**

Quantitative Structure Activity Relationship

Quantitative Structure Activity Relationship (QSAR) models are theoretical models that relate a. quantitative measure of chemical structure to a physical property, or a biological activity.

**What are the topological descriptors explain in detail?**

Topological indices (TIs) are two-dimensional descriptors which take into account the internal atomic arrangement of compounds, and which encode in numerical form information about molecular size, shape, branching, presence of heteroatoms and multiple bonds.

### What is the use of QSAR?

Structure-activity relationship (SAR) and quantitative structure-activity relationship (QSAR) models – collectively referred to as (Q)SARs – are mathematical models that can be used to predict the physicochemical, biological and environmental fate properties of compounds from the knowledge of their chemical structure.

### What is QSAR Slideshare?

A quantitative structure-activity relationship (QSAR) is a mathematical relationship which correlates measurable or calculable molecular properties to some specific biological activity in terms of an equation QSAR attempts to find consistent relationship between biological activity and molecular properties, so that …

**What is meant by 3D QSAR?**

The acronym 3D-QSAR or 3-D QSAR refers to the application of force field calculations requiring three-dimensional structures of a given set of small molecules with known activities (training set).

**What is QSAR used for?**

## How many topological indices are there?

Since then, over 3000 topological graph indices are registered in Chemical Data Bases. This research area is studied by mathematicians and chemists.

## Why do we use topological indices?

Topological indices are used for example in the development of quantitative structure-activity relationships (QSARs) in which the biological activity or other properties of molecules are correlated with their chemical structure.

**What is QSAR in drug discovery?**

Quantitative structure-activity relationships (QSAR) have been applied for decades in the development of relationships between physicochemical properties of chemical substances and their biological activities to obtain a reliable statistical model for prediction of the activities of new chemical entities.