chelation

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Related to Chelant: chelate compound, chelator

che·la·tion

(kē-lā'shŭn),
Complex formation involving a metal ion and two or more polar groupings of a single molecule; in heme, the Fe2+ ion is chelated by the porphyrin ring. Chelation can be used to remove an ion from participation in biologic reactions, as in the chelation of Ca2+ of blood by EDTA, which thus acts as an anticoagulant.
[G. chēlē, claw]

chelation

[kēlā′shən]
a chemical reaction in which there is a combination with a metal to form a ring-shaped molecular complex in which the metal is firmly bound and isolated. See also chelating agent.

che·la·tion

(kē-lā'shŭn)
Complex formation involving a metal ion and two or more polar groupings of a single molecule; can be used to remove an ion from participation in biologic reactions, as in the chelation of Ca2+ of blood by ethylenediaminetetraacetic acid, which thus acts as an anticoagulant in vitro.
[G. chēlē, claw]

chelation

the binding of a metal ion to an organic molecule from which it can later be released. In complex molecules, chelation results in, for example, zinc binding with amino acids in carboxypeptidase enzymes. Some chelating agents, such as penicillamine, are drugs used to treat metal poisoning: the metal is bound to the drug and can then be excreted safely Chelation also enables plants to take up metal ions such as iron that are not readily available in a free state.

Chelation

The process by which a molecule encircles and binds to a metal and removes it from tissue.
Mentioned in: Heavy Metal Poisoning

chelation

removal of ions so that they are unavailable to participate in biological reactions; tea chelates dietary iron (Fe2+), preventing its absorption; excessive tea drinking can exacerbate tendency to iron-deficiency anaemia, especially in the elderly

chelation (kē·lāˑ·shn),

n 1. medical treatment in which heavy metals are flushed from the bloodstream by means of a chelator that binds metal ions; used in cases of mercury or lead poisoning.
2. the process of ring formation by forming one or more hydrogen bonds.

che·la·tion

(kē-lā'shŭn)
Complex formation involving a metal ion and two or more polar groupings of a single molecule.
[G. chēlē, claw]

chelation (kēlā´shən),

n chemical reaction of a metallic ion (e.g., calcium ion) with a suitable reactive compound (e.g., ethylenediamine tetra-acetic acid) to form a compound in which the metal ion is tightly bound.
chelation therapy,
n the use of a chelating agent to bind firmly and sequester metallic poisons.
References in periodicals archive ?
The Dow Amines and Chelants business at Seal Sands will idle production around the beginning of April due to "increasingly challenging operational and market conditions".
Rapid industrialization has escalated the market for chelants in various end-user industries.
Some of the most commonly used chelants in detergent industry are phosphates, EDTA, sodium citrate and zeolite compounds.
Chelating agents, or chelants, are ligands that interact strongly with metals and so are used in a wide array of applications.
This protective film is challenged by numerous factors such as low or falling pH (acidity), high chloride & sulfate, bacterial action, high or rising temperature, high flow velocity, chelants, complexing agents, and mechanical effects such as vibration & stress.
Components of a good disinfectant include the water quality used, an antimicrobial compound, an oxidant, chelants to tie up available ions like iron or calcium, solvents, and a base or acid component.
Hercules Industrial Cleaners include alkaline, solvent, chelants and organic acids for cleaning grease, oil and polymeric deposits.
ELLESMERE Port chemical company Associated Octel has won a Green Chemical Technology Award for its Octaquest product on reducing the harmful effect of chelants -chemicals used in toiletry and photographic products which end up in rivers.
Moreover, other solutes of the EPF such as magnesium, phosphate, small chelants that bind soluble calcium, and organic components like soluble shell proteins are all inhibitory to calcite formation.
Additionally, she has held the position of global business director for Amines and Chelants, a global business unit in Dow's Performance Materials Division, as well as chief executive officer of ANGUS, a wholly owned subsidiary of Dow, and global general manager of Dow Performance Additives, a global business unit in Dow's Advanced Materials Division.
Technologies include: sulfate free, mild surfactants, emollient esters, silicones, natural and synthetic polymers, environmentally friendly chelants and specialty additives.
HIC offers ingredients manufactured by many of the industry's leading producers, including I&I enzymes, surfactants, solvents, dispersants, thickeners, chelants, builders, sanitization and disinfection, shine and durability enhancers, foam control, color care, specialty acids, corrosion inhibitors and processing chemistries.