Online Google Dictionary

chelation 中文解釋 wordnet sense Collocation Usage Collins Definition
  1. (medicine) the process of removing a heavy metal from the bloodstream by means of a chelate as in treating lead or mercury poisoning
  2. the process of forming a ring by forming one or more hydrogen bonds
  3. (chelated) chelate: relating to or characterized by chelation
  4. Chelation is the formation or presence of two or more separate bindings between a polydentate (multiple bonded) ligand and a single central atom. Usually these ligands are organic compounds, and are called chelants, chelators, chelating agents, or sequestering agents.
  5. the formation of a polydentate chelate compound from a metal salt; the use of this process to remove metal ions from solution, especially to counter poisoning by heavy metals
  6. (Chelated) The word chelate by definition means to combine with a metal (mineral). It is the bonding between a mineral and an organic molecule. ...
  7. (Chelated) the attachment of an organic or carbon-containing chemical compound to amineral. Chelating agents are often used to increase the absorption of minerals in thebody. Amino acids are very commonly used as chelating agents.
  8. (Chelating) A deep cleansing process which strips the hair lightly before a chemical service. Also known as clarifying.
  9. (Chelating) contain two or more atoms that tend to bind to a single metal atom, example - acetylacetonate (acac); abbreviation usually k^2.
  10. (CHELATOR) A chelating agent is a water soluble molecule that can bond tightly with metal ions, keeping them from coming out of suspension and depositing their stains and scale onto pool surfaces and equipment. Similar to sequestering agents.
  11. (Chelator) A compound that grabs free-floating metals in test tubes, cells, or tissues
  12. (Chelator) A molecule that binds a metal ion to itself. This can be used to remove an ion from participation in biological processes.
  13. (Chelator) Any of a class of relatively stable coordination compounds consisting of a central metal atom attached to a large molecule, called a ligand, in a cyclic or ring structure.
  14. (Chelator) Chemical compounds that neutralize metals such as iron, copper, lead and zinc, ­which absorb into the skin after washing with tap water or are excreted from the skin during perspiration. ...
  15. (Chelator) binds the excess copper in the body and increases the excretion of copper in the urine.
  16. (chelator) substance that binds particular ions, removing them from solution, e.g., EDTA is a chelator of divalent cations such as Mg^++.
  17. A therapy used to remove excess iron from the blood and tissues by providing drugs to which iron is bound and then excreted.
  18. A chemical complexing (forming or joining together) of metallic cations (such as copper) with certain organic compounds, such as EDTA (ethylene diamine tetracetic acid). Chelation is used to prevent the precipitation of metals (copper).
  19. a form of chemical weathering. Organic acids released during decomposition release iron and aluminium from the A horizon and combine with them to form chelates.
  20. the process by which both naturally occurring and artificial agents can be used as sequestering agents, thereby making radionuclides and other chemicals in a particular media available for transfer to another environment. ...
  21. Chemical binding of metals by organic compounds. Especially important in soil chemistry and the formation of Spodosols. Decreases the chemical reactivity and increases the mobility of iron and aluminum in soils.
  22. Chelation is the solubilization of a metal salt by forming a chemical complex or sequestering. One way of doing this is with ethylenediaminetetra-acetic acid (EDTA) salts, which have a multidentate spiral ligand form that can surround metallic and other ions.
  23. combining of metallic ions with certain heterocyclic ring structures so that the ion is held by chemical bonds from each of the participating rings; chelating agents are commonly used to remove toxic metals from the body.
  24. The process of removing toxic, unwanted heavy metals from the tissues and organs of the body.
  25. Process by which certain micronutrients are treated to keep them readily available to a plant once they are introduced into the soil. Some of the micronutrients which would not remain available without chelation are copper, iron, magnesium, manganese and zinc.