chelation
Học thuậtThân thiện
Definition
- Noun:
- (Chemistry) The process of forming a chelate: A chemical process where a central metal ion is bonded to a surrounding molecule (ligand) at two or more points, forming a stable, ring-like structure.
- (Medicine) A therapeutic process: The use of chelating agents to remove heavy metal ions (like lead or mercury) from the body by binding them into soluble complexes that can be excreted.
Usage Examples
Noun (Chemistry):
- The chelation of iron by the EDTA molecule is a classic example in coordination chemistry.
- Chelation is a key mechanism in many biological systems, such as the binding of magnesium in chlorophyll.
Noun (Medicine):
- The doctor recommended chelation therapy for the patient with severe lead poisoning.
- Chelation is an effective treatment for certain types of metal toxicity.
Advanced Usage
- "Chelation therapy": A specific medical treatment involving the administration of chelating agents.
- Despite its use for heavy metal poisoning, the efficacy of chelation therapy for heart disease remains controversial.
Variants and Related Words
- Chelate (noun/verb): The ring-shaped compound formed, or the act of forming such a compound.
- The chelate was stable in solution. (noun)
- This agent can chelate copper ions. (verb)
- Chelating agent (noun): A substance, like EDTA, that causes chelation.
- EDTA is a common chelating agent used in medicine and industry.
Synonyms
- Sequestration: The process of forming a stable complex with an ion, especially a metal ion.
- Complexation: A broader term for the formation of a complex, which includes chelation as a specific type.
Related Phrases
- Undergo chelation: To be subjected to the chelation process.
- The contaminated soil must undergo chelation to remove the toxic metals.
Noun
- the process of forming a ring by forming one or more hydrogen bonds
- (medicine) the process of removing a heavy metal from the bloodstream by means of a chelate as in treating lead or mercury poisoning