Chelation

The trapping of a multi-valent ionic species by ionic bonding to a larger water soluble molecule so as to render the ion inactive in the biological matrix and to aid excretion.

Chelation

In chemistry, this describes the combination of a metallic ion with heterocyclic ring structures in such a way that the ion is held by bonds from each of the rings.

chelation

Binding of a metal ion by a larger molecule such as EDTA or protein (iron in haem is held as a chelate). The binding is strong but reversible and chelating agents can be used to buffer the free concentration of the ion in question.

Chelation

Chelation describes a particular way that ions and molecules bind metal ions. According to the International Union of Pure and Applied Chemistry (IUPAC), chelation involves the formation or presence of two or more separate coordinate bonds between a polydentate (multiple bonded) ligand and a single central atom. Usually these ligands are organic c...
Found on http://en.wikipedia.org/wiki/Chelation

chelation

(ke-la┬┤shәn) combination with a metal in complexes in which the metal is part of a ring. See also chelate.
Found on http://www.encyclo.co.uk/local/21001

chelation

[n] - (medicine) the process of removing a heavy metal from the bloodstream by means of a chelate as in treating lead or mercury poisoning 2. [n] - the process of forming a ring by forming one or more hydrogen bonds
Found on http://www.webdictionary.co.uk/definition.php?query=chelation

chelation

<biochemistry, chemistry> Combination with a metal in complexes in which the metal is part of a ring. ... (21 May 1997) ...
Found on http://www.encyclo.co.uk/local/20973

chelation

A chemical process involving formation of a heterocyclic ring compound that contains at least one metal cation or hydrogen ion in the ring.
Found on http://www.encyclo.co.uk/local/20742

chelation

A chemical process involving formation of a heterocyclic ring compound that contains at least one metal cation or hydrogen ion in the ring
Found on http://www.encyclo.co.uk/local/21115

chelation

A chemical reaction in which a certain type of organic compound, known as a chelating agent, combines with a metal ion by forming coordinate bonds with two or more atoms of the organic compound. Examples of chelating agents include tartaric acid (CHOHCOOH)2 and ethylenediamine...
Found on http://www.daviddarling.info/encyclopedia/C/chelation.html

Chelation

A combiation of a mineral with a larger molecule.
Found on http://www.superglossary.com/Glossary/Health/Vitamins/

chelation

A process in which a metal ion is coordinatively bound to an organic molecule forming a heterocyclic ring.
Found on https://www.encyclo.co.uk/local/22437

Chelation

Chemical means of removing heavy metals, such as mercury from the body. Some people believe that autism is caused by an excess of heavy metals in people with autism.
Found on http://www.researchautism.net/glossary.ikml?l=c

Chelation

Chemical weathering process that involves the extraction or metallic cations from rocks and minerals by chelates.
Found on http://www.physicalgeography.net/physgeoglos/c.html

chelation

combination with a metal in complexes in which the metal is part of a ring.
Found on http://users.ugent.be/~rvdstich/eugloss/DIC/dictio16.html

chelation

In chemistry, this describes the combination of a metallic ion with heterocyclic ring structures in such a way that the ion is held by bonds from each of the rings.
Found on http://www.chemicalglossary.net/definition/391-Chelation

Chelation

The formation of bonds between organic compounds and metals, some of which are insoluble, as in humus. Soluble chelates are used in fertilizers to help keep nutrient metals, such as iron, mobile in the soil and thus available to plants rather than locked up in insoluble mineral salts.
Found on https://www.planetnatural.com/vegetable-gardening-guru/garden-terms/

chelation

The formation or presence of bonds (or other attractive interactions) between two or more separate binding sites within the same ligand and a single central atom. A molecular entity in which there is chelation (and the corresponding chemical species) is called a 'chelate'. The terms bidentate (or didentate), tridentate, tetradentate... multidentate...
Found on http://www.chem.qmul.ac.uk/iupac/gtpoc/CaCl.html

chelation

Type: Term Pronunciation: kē-lā′shŭn Definitions: 1. 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...
Found on http://www.medilexicon.com/medicaldictionary.php?t=16633

Chelation

Using a chelating agent that will bind with metals in order to try to release them from the body. With autism, this might be done in order to test for mercury levels.
Found on http://www.encyclo.co.uk/local/20540
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