chelation

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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]

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

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]
References in periodicals archive ?
Because a sequestering agent is now added to the tower inlet, this source could not be used in research.
* Sequestering agents do function to maintain manganese in solution to inhibit oxide formation.
He points out that a sequestering agent will keep the staining at bay, which is important because iron can wreak havoc on a pool's surface when certain chemicals are added to the water.
Mycotoxin sequestering agents: Practical tools for neutralisation of mycotoxins.
Absorbents, Active Ingredients, Anti-Oxidants, Binders, Chelating / Sequestering Agents, Compression Aides, Conditioning Agents, Delivery Systems, Botanical Extracts, Emollients, Emulsifiers, Esters, Extenders/Fillers, Flow and Matting Agents, Odor Absorbers, Oil Absorbers, Oleochemicals, Organic / Inorganic Sunscreens, Performance Concentrates, Pigments and Figment Extenders, Polymers, Preservatives, Rheology Modifiers / Pearlizing Agents, Silicones, Solubilizers, Spreading Agents, Sunscreen Actives (SPF), Surfactants, Texture Enhancers, UV Absorbers/Light Stabilizers, Waxes and Wetting Agents
Rows upon rows of sanitizers, clarifiers, algaecides, flocculants, sequestering agents, balancers, shocks and more can intimidate even the hardiest consumer.
* Scale and stain control: Most sequestering agents can control metal staining and scaling in hot tubs.
Sequestering agents will help keep these minerals in solution, while clarifiers and filter aids can help remove them from the water.