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 ?
A Dow spokesperson said: "The option to idle the facility comes on the back of increasingly challenging operational and market conditions; lack of cost effective and reliable raw material supply, alongside overcapacity in the liquid chelant sector.
In this new clinical development initiative, DOTA-based bifunctional chelant technology will be used to attach a therapeutic radionuclide to the same murine monoclonal antibody utilized in Cytogen's PROSTASCINT(R) (capromab pendetide) molecular imaging agent.
Customer programs can go all the way from feasibility/optimization studies through kit formulation to process development and custom manufacturing of cGMP materials including chelant and bio-conjugate.
These factors resulted in the business needing to review its long-term strategic options for the chelant and sodium sarcosinate production at Seal Sands.
These factors resulted in the business needing to review its long term strategic options for the chelant and sodium sarcosinate production at Seal Sands.
EDDS and EDTA-enhanced phytoextraction of metals from artificially contaminated soil and residual effects of chelant compounds.
Phytate was chosen because phytic acid is an inexpensive chelant that was shown to interact well with a fiber matrix (Mancosky et al.
Because of differences in metal ion contents in the wood and water from place-to-place, or even season-to-season, chelant optimization must be tailored to the specific situation.
Tenders are invited for Z114 Pa Hd 250 Concentrated Powder Blend Of Dispersants And Non-Foaming Surfactant Fortified With A High Percent Of Chelants For The Fast And Effective Removal Fo Grease Cabon Rust Scale And Paint 01 Kgs.
Global market for chelants is quite mature, with demand increasing primarily on account of growth in end use industries.
Specifically, the Green Chemistry Institute is looking for greener antimicrobials, solvents, small amines, chelants, boron alternatives, fragrance raw materials, corrosion inhibitors, alkanolamide replacements, surfactants and UV filters.