The aim is to collect a very broad range of physical, chemical, morphological, and structural data for crystals on an encyclopedic scale and to seek all possible useful and revealing correlations of properties with internal structure.

Alkanes ( also known as paraffins or saturated hydrocarbons ) are chemical compounds that consist only of hydrogen and carbon atoms and are bonded exclusively by single bonds ( i. e., they are saturated compounds ) without any cycles ( or loops ; i. e., cyclic structure ).

The chemical structure of penicillin was determined by Dorothy Crowfoot Hodgkin in 1945.

Antibacterial antibiotics are commonly classified based on their mechanism of action, chemical structure, or spectrum of activity.

This classification was justified by the lack of knowledge about the chemical structure of alkaloids and is now considered obsolete.

The chemical structure of venlafaxine ( Effexor ), an Serotonin-norepinephrine reuptake inhibitor | SNRI

The typical antipsychotics are classified according to their chemical structure while the atypical antipsychotics are classified according to their pharmacological properties.

Teeth of the radula of chiton Chaetopleura apiculata has been studied by atom-probe tomography for the chemical structure and it have been published in 2011.

The chemical structure of 6, 6 ′- dibromoindigo, the main component of Tyrian Purple

The exact chemical composition and the sequence in which these units are arranged is called the primary structure, in the case of proteins.

Botany covers a wide range of scientific disciplines including structure, growth, reproduction, metabolism, development, diseases, chemical properties, and evolutionary relationships among taxonomic groups.

A benzodiazepine ( sometimes colloquially " benzo "; often abbreviated " BZD ") is a psychoactive drug whose core chemical structure is the fusion of a benzene ring and a diazepine ring.

Benzodiazepines share a similar chemical structure, and their effects in humans are mainly produced by the allosteric modification of a specific kind of neurotransmitter receptor, the GABA < sub > A </ sub > receptor, which increases the conductance of this inhibitory channel ; this results in the various therapeutic effects as well as adverse effects of benzodiazepines.

Chemistry is the science of matter, its properties, structure, composition and its changes during interactions and chemical reactions.

Chemistry is the science of matter, especially its chemical reactions, but also its composition, structure and properties.

Chemical substances are classified in terms of their structure, phase, as well as their chemical compositions.

) the structure of polyatomic molecules, that are constituted of more than six atoms ( of several elements ) can be crucial for its chemical nature.

* Analytical chemistry is the analysis of material samples to gain an understanding of their chemical composition and structure.

* Organic chemistry is the study of the structure, properties, composition, mechanisms, and chemical reaction of organic compounds.

The atoms in molecules, crystals, metals and diatomic gases — indeed most of the physical environment around us — are held together by chemical bonds, which dictate the structure and the bulk properties of matter.

* The prediction of the molecular structure of molecules by the use of the simulation of forces, or more accurate quantum chemical methods, to find stationary points on the energy surface as the position of the nuclei is varied.

: General chemical structure of one type of condensation polymer

While the overall structure of archaeal pseudopeptidoglycan superficially resembles that of bacterial peptidoglycan, there are a number of significant chemical differences.

Chemistry – science of atomic matter ( matter that is composed of chemical elements ), especially its chemical reactions, but also including its properties, structure, composition, behavior, and changes as they relate the chemical reactions.

In his work on optics just as much as in his work on thermodynamics, Gibbs deliberately avoided speculating about the microscopic structure of matter, which proved a wise course in view of the revolutionary developments in quantum mechanics that began around the time of his death.

The entropy of a pure crystalline structure can be 0 J mol < sup >− 1 </ sup > K < sup >− 1 </ sup > only at 0 K, according to the third law of thermodynamics.

Later chapters in the books deal with atomic structure ( Mr Tompkins spends time as a conduction electron, returning to consciousness when he is annihilated in an encounter with a positron ) and thermodynamics ( the Professor expounds an analogy between the second law of thermodynamics and the bias towards the casino in gambling before being confounded by a local reversal of the second law through the intervention of Maxwell's demon who has introduced himself to Maud in one of her dreams ).

The weak nature of interactions is responsible for the flexibility of the architecture and allows for rearrangements of the structure in the direction determined by thermodynamics.

Some concepts of particular importance for non-equilibrium thermodynamics include time rate of dissipation of energy ( Rayleigh 1873, Onsager 1931, also ), time rate of entropy production ( Onsager 1931 ), thermodynamic fields, dissipative structure, and non-linear dynamical structure.

* Social thermodynamics theory, which attempts to describe social phenomena using an approach with the mathematical structure of thermodynamics.

He was described as " one of the most influential physical chemists of his era " whose work " spanned almost all of the important fields of physical chemistry: thermodynamics, statistical mechanics, molecular structure, quantum mechanics, spectroscopy, chemical bonding, relativistic chemical effects, properties of concentrated aqueous salt solutions, kinetics, and conformational analysis.

Typically, the topics are, in order, descriptive chemistry / laboratory techniques, stoichiometry, gases / liquids / solids, thermodynamics, kinetics, equilibrium, electrochemistry, electronic structure / periodic trends, bonding theories, and organic chemistry.

Molecular modelling methods are now routinely used to investigate the structure, dynamics, surface properties and thermodynamics of inorganic, biological and polymeric systems.

) The concept of nationalism is the political principle that epitomizes and glorifies the territorial state as the characteristic type of socal structure.

It is a splendid structure.

The proprietor is able to create a leadership impossible in the corporate structure with its board of directors and stockholders.

I refer to the notion that the structure of society is a microcosm of the cosmic design and that history conforms to patterns of justice and chastisement as if it were a morality play set in motion by the gods for our instruction.

In order to attract additional industry that is compatible with this community it is all the more important to present to the industrial prospect an orderly balance in the tax structure.

The first part of the new structure -- that for supporting the basic program of vocational rehabilitation services -- is described in this Section.

The structure is complete.

The transducer itself moves the beam in a sector scan, just like a radar antenna, while the entire transducer structure is moved over a 90-degree arc in front of the eye to `` look into '' all corners.

One way to formalize this is in the job structure.

It is important to consider and experimentally verify this influence since quantitative nuclear resonance is becoming increasingly used in investigations of structure.

Af appeared to be well suited for the study of these matters, since it is a normal paramagnet, with three unpaired electrons on the chromium, its crystal structure is very simple, and the unknown position of the hydrogen in the strong Af bond provides structural interest.

A drawing of the structure is to be found in reference 6.

The structure appears to be unique among OOH compounds, but is the same as that assumed by Af.

Whereas the usual organic surface-active agent is strongly sorbed at oil - water interfaces, the highly charged ions are most strongly sorbed at interfaces between water and insoluble materials exhibiting an ionic structure ( see Table 26-2 on p. 1678 ).

However, the conversion from mass to size is unreliable, since many photographic meteors give evidence of a fluffy, loosely bound meteorite structure with densities as low as Af.

The nest itself, the structure that in some cases housed about 2,000 individuals when the season was at its peak, is now rapidly destroyed by the scavenging larvae of certain beetles and moths.

The nuclei of these fibers, as is shown in Figures 3 and 4, showed remarkable proliferation and were closely approximated, forming a chainlike structure at either the center or the periphery of the fiber.

What Parker and his contemporaries -- Gillespie, Davis, Monk, Roach ( Tristano is an anomaly ), etc. -- did was to absorb the musical ornamentation of the older jazz into the basic structure, of which it then became an integral part, and with which it then developed.

Ornament is confabulation in the interstices of structure.

In continuation of these theoretical studies, a more precise elucidation of the effects of imperfections in network structure is sought.

Helping foreign countries to build a sound political structure is more important than aiding them economically, E. M. Martin, assistant secretary of state for economic affairs told members of the World Affairs Council Monday night.