anion exchange


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Related to anion exchange: cation exchange, Anion exchange membrane, anion exchange resin

an·i·on ex·change

(an'ī-on eks-chānj'),
The process by which an anion in a mobile (liquid) phase exchanges with another anion previously bound to a solid, nonmobile, positively charged phase, the latter being an anion exchanger. For example, the process takes place when Cl- is exchanged for OH- in desalting. The reaction is Cl- (in solution) + (OH- on anion exchanger+) → (Cl- on anion exchanger) + OH- (in solution); in combination with the cation exchange, NaCl is removed from solution. Anion exchange may also be used chromatographically, to separate anions, and, medicinally, to remove an anion (for example, Cl-) from gastric contents or bile acids in the intestine.

an·i·on ex·change

(an'ī-on eks-chānj')
The process by which an anion in a mobile (liquid) phase exchanges with another anion previously bound to a solid, positively charged phase, the latter being an anion exchanger. Anion exchange may also be used chromatographically, to separate anions, and medicinally, to remove an anion (e.g., Cl-) from gastric contents or bile acids in the intestine.

exchange

(eks-chanj')
1. To give up or substitute something for something else.
2. In dietetics, the substitution of an equivalent amount of one food substance for another so that the caloric intake remains the same. Exchange diets are used frequently to help manage diabetes mellitus, and they have been adapted for use in proprietary weight loss programs.
3. In peritoneal dialysis, to drain fluid from the peritoneal cavity and replace it with fresh dialysate.

anion exchange

See: resin, ion-exchange

cation exchange

The transfer of cations between those in a liquid medium and those in a solid polymer. The polymer is termed the cation exchanger. Cation exchange is used in ion-exchange chromatography and in certain water purifiers.

food exchange

A grouping of commonly consumed foods according to similarities in composition so that the foods may be used interchangeably in diet planning.

sister chromatid exchange

The exchange of corresponding parts of homologous maternal and paternal chromosomes during the first meiotic division. This contributes to genetic diversity in the offspring. Synonym: crossing over

transcapillary exchange

The passage of substances between blood and tissue (interstitial) fluid.

anion exchange

the process by which a liquid-phase ion exchanges with an ion that was previously bound to a positively charged solid
References in periodicals archive ?
Decolorization of crude filtered vancomycin using a strong base anion exchange resin improved the purification of the vancomycin with subsequent reversed phase chromatography.
The data presented from the controlled environment experiment demonstrate the application of anion exchange membranes for non-destructive collection of organic anions from discrete regions of soil-grown plants (Fig.
15,46] Furthermore, 2 groups have failed to detect AB in erythrocytes from patients with AD,[28,47] and phosphorylation of band 3 by this mechanism is not likely to contribute to abnormal anion exchange.
Conditions of preparation and ion-exchange capacity of various PAN-silica gel anion exchange composite fibers.
In contrast, pH of anion exchange film is higher than isoelectric point.
Anion exchange chromatography separated the decolourised fraction into two major peaks, i.
Most surface soils have low anion exchange capacities even at low pH, and also have low p[H.
In addition to using strong anion exchange chromatography (SAX) to analyze purification of the sample fractions, mass spectrometry was used to provide the most accurate and sensitive measure of purity.
The versatile ClinProt MB magnetic bead assays include various choices of hydrophobic bead types, weak anion exchange (WAX) beads, weak cation exchange (WCX) beads, immobilized metal affinity capture (IMAC) beads with both copper and iron variants, as well as MagAB antibody beads for biologically selective, very sensitive clinical assays.
Typical use includes protein purification with size exclusion chromatography and anion exchange resins using 5-500 mL column bed volumes.
Topics addressed include small community integrated water resources supply and recycling, recycling and reuse of high purity water from semiconductor integrated circuits manufacturing processes, cleaner production by using electrodialysis in organic or aqueous-organic systems, recovery and recycling of waste acids from industrial spent liquors using diffusion dialysis with new series of anion exchange membranes, improving resource cascading, environmental impacts of oil shale and coal electricity, strategies for reducing carbon dioxide emissions in rural communities of Botswana, the impact of economic incentives on recycling behavior, ulta-compact biofilm reactors for wastewater treatment and recovery, and decision support systems for material recovery and energy production.
Our goal was therefore to develop a robust liquid chromatographytandem mass spectrometry (LC-MS/MS) urine oxalate assay that uses online anion exchange clean-up to minimize the effects of ion suppression.