A chemical structure of a molecule is a spatial arrangement of its atoms and their chemical bonds. Its determination includes a chemist's specifying the...

Material structures include man-made objects such as buildings and machines and natural objects such as biological organisms, minerals and chemicals. Abstract...

Atoms are the basic particles of the chemical elements. An atom consists of a nucleus of protons and generally neutrons, surrounded by an electromagnetically...

The structural formula of a chemical compound is a graphic representation of the molecular structure (determined by structural chemistry methods), showing...

The structure–activity relationship (SAR) is the relationship between the chemical structure of a molecule and its biological activity. This idea was first...

A chemical substance is a unique form of matter with constant chemical composition and characteristic properties. Chemical substances may take the form...

Quantitative structure–activity relationship models (QSAR models) are regression or classification models used in the chemical and biological sciences...

58)]. Chemical compounds have a unique and defined chemical structure held together in a defined spatial arrangement by chemical bonds. Chemical compounds...

format, which is similar to Structure Data Format (SDF) files. They are text files that represent multiple chemical structure records and associated data...

A chemical database is a database specifically designed to store chemical information. This information is about chemical and crystal structures, spectra...

chemical species can be described by a Lewis structure. For many chemical species, a single Lewis structure, consisting of atoms obeying the octet rule...

Markush structures are frequently used with chemical structures to indicate a group of related chemical compounds. They are commonly used in chemistry...

substance's internal structure must be affected greatly for its chemical properties to be investigated. When a substance goes under a chemical reaction, the...

chemical formula is not a chemical name since it does not contain any words. Although a chemical formula may imply certain simple chemical structures...

practice so that, when a chemical term is used it has a fixed meaning relating to chemical structure, thereby giving insights into chemical properties and derived...

quantum chemistry by Pauling's 1939 text The Nature of the Chemical Bond and the Structure of Molecules and Crystals: An Introduction to Modern Structural...

He was the principal founder of the theory of chemical structure and in particular the Kekulé structure of benzene. Kekulé never used his first given...

of the structure of molecules has increased. Earlier definitions were less precise, defining molecules as the smallest particles of pure chemical substances...

Ring structure may refer to: Chiastic structure, a literary technique Heterocyclic compound, a chemical structure Ring (mathematics), an algebraic structure...

back to their chemical structure; for this reason, two commodities produced by two different suppliers but with the same chemical structure and purity are...

electrons due to an absorption of energy performed by the chemical. The study of chemical structure by means of energy absorption and release is generally...

tautomeric structures, before generating the InChI, an input chemical structure is normalized to reduce it to its so-called core parent structure. This may...

usually toxic plant-derived secondary metabolites. They are organic chemicals that become foamy when agitated in water and have high molecular weight...

Chemical table file (CT file) is a family of text-based chemical file formats that describe molecules and chemical reactions. One format, for example,...

The chemical state of the water varies widely between different classes of hydrates, some of which were so labeled before their chemical structure was...

chemicals that try to take advantage of as much of the appropriate chemical space as possible. The chemical space of all possible chemical structures...

Optical chemical structure recognition (OCSR) is the translation of images that depict chemical structure information into machine-readable formats. It...

creating and modifying representations of chemical structures. Molecule editors can manipulate chemical structure representations in either a simulated two-dimensional...

A cyclopropyl group is a chemical structure derived from cyclopropane; it is typically produced in a cyclopropanation reaction. The group has an empirical...

rules for eliminating chemically unlikely structures and for determining the relative sizes of atoms. These rules led to the structure of brookite (1928)...