chemical action


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Related to chemical action: chemical reaction
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Noun1.chemical action - (chemistry) any process determined by the atomic and molecular composition and structure of the substances involvedchemical action - (chemistry) any process determined by the atomic and molecular composition and structure of the substances involved
chemical science, chemistry - the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions
acylation - the process of introducing an acyl group into a compound
agglutinating activity, agglutination - the coalescing of small particles that are suspended in solution; these larger masses are then (usually) precipitated
amylolysis - conversion of starch to sugar
association - (chemistry) any process of combination (especially in solution) that depends on relatively weak chemical bonding
blueing, bluing - a process that makes something blue (or bluish)
calcification - a process that impregnates something with calcium (or calcium salts)
catalysis, contact action - acceleration of a chemical reaction induced the presence of material that is chemically unchanged at the end of the reaction; "of the top 50 commodity chemicals, 30 are created directly by catalysis and another 6 are made from raw materials that are catalytically produced"
chelation - the process of forming a ring by forming one or more hydrogen bonds
chemical reaction, reaction - (chemistry) a process in which one or more substances are changed into others; "there was a chemical reaction of the lime with the ground water"
chlorination - the addition or substitution of chlorine in organic compounds
cleavage - the breaking of a chemical bond in a molecule resulting in smaller molecules
corroding, corrosion, erosion - erosion by chemical action
cracking - the process whereby heavy molecules of naphtha or petroleum are broken down into hydrocarbons of lower molecular weight (especially in the oil-refining process)
deamination, deaminization - removal of the amino radical from an amino acid or other amino compound
decalcification - loss of calcium from bones or teeth
decarboxylation - the process of removing a carboxyl group from a chemical compound (usually replacing it with hydrogen)
de-iodination - the removal of iodine atoms from organic compounds
demineralisation, demineralization - the removal of minerals and mineral salts from a liquid (especially from water)
desalination, desalinisation, desalinization - the removal of salt (especially from sea water)
digestion - the process of decomposing organic matter (as in sewage) by bacteria or by chemical action or heat
dissociation - (chemistry) the temporary or reversible process in which a molecule or ion is broken down into smaller molecules or ions
gasification - the process of changing into gas; "coal gas is produced by the gasification of coal"
gassing - the process of interacting with gas
hydrogenation - a chemical process that adds hydrogen atoms to an unsaturated oil; "food producers use hydrogenation to keep fat from becoming rancid"
intumescence, intumescency, swelling - the increase in volume of certain substances when they are heated (often accompanied by release of water)
inversion - a chemical process in which the direction of optical rotation of a substance is reversed from dextrorotatory to levorotary or vice versa
iodination - the substitution or addition of iodine atoms in organic compounds
chemical mechanism, mechanism - the atomic process that occurs during a chemical reaction; "he determined unique mechanisms for the photochemical reactions"
natural action, natural process, action, activity - a process existing in or produced by nature (rather than by the intent of human beings); "the action of natural forces"; "volcanic activity"
nitrification - the chemical process in which a nitro group is added to an organic compound (or substituted for another group in an organic compound)
peptisation, peptization - the process of converting to a sol; bringing to a colloidal solution
photosynthesis - synthesis of compounds with the aid of radiant energy (especially in plants)
polymerisation, polymerization - a chemical process that combines several monomers to form a polymer or polymeric compound
precipitation - the process of forming a chemical precipitate
proteolysis - the hydrolysis of proteins into peptides and amino acids by cleavage of their peptide bonds
pyrochemical process, pyrochemistry - processes for chemical reactions at high temperatures
sequestration - the action of forming a chelate or other stable compound with an ion or atom or molecule so that it is no longer available for reactions
synaeresis, syneresis - the separation of liquid from a gel that is caused by contraction (as in cheese making)
synthesis - the process of producing a chemical compound (usually by the union of simpler chemical compounds)
References in classic literature ?
And where it came upon water some chemical action occurred, and the surface would be instantly covered with a powdery scum that sank slowly and made way for more.
Fancy a surgeon, with his nippers lifting tendons, muscles and such things into view, out of the complex machinery of a corpse, and observing, "Now this little nerve quivers--the vibration is imparted to this muscle--from here it is passed to this fibrous substance; here its ingredients are separated by the chemical action of the blood--one part goes to the heart and thrills it with what is popularly termed emotion, another part follows this nerve to the brain and communicates intelligence of a startling character--the third part glides along this passage and touches the spring connected with the fluid receptacles that lie in the rear of the eye.
A great deal of chemical action then commences, salts of various kinds effloresce on the surface, and the mass becomes hard.
It is now known that the sentiments and emotions reside in the stomach, being evolved from food by chemical action of the gastric fluid.
A medical expert said Tina's skull had been subjected to "corrosive chemical action" and suggested the sadistic killer had tried to dissolve her remains in some kind of chemical bath.
Highlighting on Drug, Pills and Medication, she said that a drug refers to a substance that could bring about a change in the biological function through its chemical action. In order to keep away youth from using the drugs, she advised to parents to talk openly about the danger of both illegal and prescription drug use with their kids, lay down rules and consequences, monitor their kids activities and keep prescription medicine in a safe place.
Ancient mariners found out that it was not age alone that improved the quality of the fibre of wood in a ship, but the straining and wrenching of the vessels by the wind and the waves, the chemical action of the bilge water and the weight of many kinds of cargo she carried.
The exact chemical action of the drug is still not clearly known, but it is a depressant, which means it slows down your brain and therefore your body's responses.
Handle construction is in highly polished AISI 316 for easy cleaning with a high degree of resistance to corrosion, temperature and chemical action, e.g.
Washington Chemical Chemical Action Plan with policy Action Plans for recommendations for reducing potential PBTs (11) human health and environmental risks associated with exposure to PBDEs.
However, skeptical researchers have evaluated many studies supporting antidepressants (including those submitted to the FDA) and have found that most of their benefits derive from placebo effect rather than chemical action. (1) I remember simpler days of telling patients that their physician was prescribing their medication for a "chemical imbalance." They would typically nod in acceptance of this simplistic biological hypothesis, which they mistakenly assumed to be well-validated, about what was impacting their lives.
Therefore, under the coupling effect of ion exchange and seepage, it is the chemical action of ion exchange, and not the physical action of seepage, that influences the microstructure.

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