| 释义 |
chelationenUK
che·late C0268900 (kē′lāt′)adj. Zoology Having chelae or resembling a chela.n. Chemistry A chemical compound in the form of a heterocyclic ring, containing a metal ion attached by coordinate bonds to at least two nonmetal ions.tr.v. che·lat·ed, che·lat·ing, che·lates 1. Chemistry To combine (a metal ion) with a chemical compound to form a ring.2. Medicine To remove (a heavy metal, such as lead or mercury) from the bloodstream by means of a chelate, such as EDTA.
che′lat·a·ble adj.che·la′tion n.che′la′tor n.chelation (ˈkiːleɪʃən) n1. (Chemistry) chem the process by which a chelate is formed2. (Zoology) animal husbandry the process by which trace elements in an animal's feed are bonded to amino acids, ensuring their absorption into the animal's body3. (Physical Geography) geology the chemical removal of metallic ions in a mineral or rock by weatheringche•la•tion (kiˈleɪ ʃən)
n. 1. the process of chelating. 2. a. a method of removing certain heavy metals from the bloodstream, used esp. in treating lead or mercury poisoning. b. a controversial treatment for arteriosclerosis that attempts to remove calcium deposits from the inner walls of the coronary arteries. [1930–35] Thesaurus| Noun | 1. | chelation - (medicine) the process of removing a heavy metal from the bloodstream by means of a chelate as in treating lead or mercury poisoningphysical process, process - a sustained phenomenon or one marked by gradual changes through a series of states; "events now in process"; "the process of calcification begins later for boys than for girls"medical specialty, medicine - the branches of medical science that deal with nonsurgical techniques | | 2. | chelation - the process of forming a ring by forming one or more hydrogen bondschemical action, chemical change, chemical process - (chemistry) any process determined by the atomic and molecular composition and structure of the substances involved |
TranslationschelationenUK
chelation[kē′lā·shən] (organic chemistry) A chemical process involving formation of a heterocyclic ring compound which contains at least one metal cation or hydrogen ion in the ring. chelationenUK
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.ChelationThe process by which a molecule encircles and binds to a metal and removes it from tissue.Mentioned in: Heavy Metal Poisoningche·la·tion (kē-lā'shŭn) Complex formation involving a metal ion and two or more polar groupings of a single molecule. [G. chēlē, claw]chelationenUK
Related to chelation: EDTAWords related to chelationnoun (medicine) the process of removing a heavy metal from the bloodstream by means of a chelate as in treating lead or mercury poisoningRelated Words- physical process
- process
- medical specialty
- medicine
noun the process of forming a ring by forming one or more hydrogen bondsRelated Words- chemical action
- chemical change
- chemical process
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