- chemical fractionation
- химическое фракционирование
English-Russian small dictionary of medicine. 2015.
chemical fractionation
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Fractionation — See also: Fractionated spacecraft Fractionation is a separation process in which a certain quantity of a mixture (solid, liquid, solute, suspension or isotope) is divided up in a number of smaller quantities (fractions) in which the composition… … Wikipedia
chemical element — Introduction also called element, any substance that cannot be decomposed into simpler substances by ordinary chemical processes. Elements are the fundamental materials of which all matter is composed. This article considers the… … Universalium
chemical industry — Introduction complex of processes, operations, and organizations engaged in the manufacture of chemicals and their derivatives. Although the chemical industry may be described simply as the industry that uses chemistry and… … Universalium
Chemical process — Part of Chemical engineering History Concepts Unit operations Unit processes Chemical engineer Chemical process Process integration Un … Wikipedia
Chemical equilibrium — In a chemical reaction, chemical equilibrium is the state in which the concentrations of the reactants and products have not yet changed with time. It occurs only in reversible reactions, and not in irreversible reactions. Usually, this state… … Wikipedia
isotopic fractionation — ▪ chemistry enrichment of one isotope relative to another in a chemical or physical process. Two isotopes of an element are different in weight but not in gross chemical properties, which are determined by the number of electrons. However,… … Universalium
Mass-independent fractionation — Mass independent (isotope) fractionation refers to any chemical or physical process that acts to separate isotopes, where the amount of separation does not scale in proportion with the difference in the masses of the isotopes. Most isotopic… … Wikipedia
Equilibrium fractionation — Equilibrium isotope fractionation is the partial separation of isotopes between two or more substances in chemical equilibrium. Equilibrium fractionation is strongest at low temperatures, and (along with kinetic isotope effects) forms the basis… … Wikipedia
Foam fractionation — is a chemical process in which hydrophobic molecules are preferentially separated from a liquid solution using rising columns of foam … Wikipedia
List of chemical analysis methods — A list of chemical analysis methods with acronyms.List of methods* Atomic absorption spectroscopy (AAS) * Atomic emission spectroscopy (AES) * Atomic fluorescence spectroscopy (AFS) * Alpha particle X ray spectrometer (APXS) * Capillary… … Wikipedia
rare-earth element — /rair errth /, Chem. any of a group of closely related metallic elements, comprising the lanthanides, scandium, and yttrium, that are chemically similar by virtue of having the same number of valence electrons. Also called rare earth metal. [1955 … Universalium
