chemical change


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Noun1.chemical change - (chemistry) any process determined by the atomic and molecular composition and structure of the substances involvedchemical change - (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 ?
The food that one eats is supposed to undergo certain chemical changes during the process of digestion and assimilation, the result, of course, being the rebuilding of wasted tissue.
The chemical changes take place through both direct and indirect suggestion, and we live and thrive.
They looked at whether a chemical change (methylation) in the function of the SKA2 gene measured in blood predicted the thickness of brain cortex (a measure of neuronal health) and psychological symptoms, specifically PTSD and depression.
Microorganisms in cosmetics may cause spoilage or chemical change in the product and can possibly harm consumers.
An enzyme is a protein that acts as a catalyst for a chemical change in the body - that is, it greatly speeds up the rate at which the chemical change occurs.
Widespread in the environment, the spores of these organisms arc more resistant than vegetative cells to physical and chemical change, and to chlorination, often surviving in water for long periods.
005%, PET (polyethylene terephthalate) material will undergo a chemical change during melt processing, losing viscosity and physical properties, according to Conair.
Hogan said the feeling infiltrates his body, as an uninvited chemical change.
The temperature "switch" is reversible because it is based on a physical rather than chemical change.
Smelter--Device that melts or fuses (as ore), often producing an accompanying chemical change to separate the metal.
The title of Serra's installation, The Matter of Time, references many things, among them the experiential narrative visitors undergo as they weave in and out of Serra's massive curving blades, as well as the mutable processes of chemical change evident in the surface of the oxidising steel sculptures.