| ¿µ¹® | exchange transfusion | ÇÑ±Û | ±³È¯¼öÇ÷ |
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| MPRD | cation-dependent mannose 6-phosphate receptor |
|---|---|
| SCE | Sister Chromatid Exchange; Àڸſ°»öºÎü ±³È¯ |
| AE | above-elbow [amputation]; acrodermatitis enteropathica; activation energy; adult erythrocyte; advers... |
| CIE | Canberra interview for the elderly; cellulose ion exchange; counter-current immunoelectrophoresis; c... |
| DCX | double charge exchange |
| SCX | Strong cation-exchange |
|---|---|
| CEC | cation exchange capacity |
| Ca+2 | cation |
| NSC | Nonselective cation |
| NSCC | Nonselective cation channels |
| cation exchange resins | High molecular weight insoluble polymers which contain functional cationic groups that are capable of undergoing exchange reactions; used in various types of chromatography; also to treat hyperkalaemia. (12 Dec 1998) |
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| cation exchange | The process by which a cation in a liquid phase exchanges with another cation present as the counter-ion of a negatively charged solid polymer (cation exchanger). A cation-exchange reaction in removal of the Na+ of a sodium chloride solution is RSO3-H+ + Na+ → RSO3-Na+ + H+ (R is the polymer, RSO3- is the cation exchanger); if this is combined with the anion-exchange reaction, NaCl is removed from the solution (desalting). Cation exchange may also be used chromatographically, to separate cations, and medicinally, to remove a cation; e.g., H+, from gastric contents, or Na+ and K+ in the intestine. See: anion exchange. (05 Mar 2000) |
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| cation-exchange resin | See: cation exchange, cation exchanger. (05 Mar 2000) |
| ion exchange resins | <chemistry> High molecular weight, insoluble polymers which contain functional groups that are capable of undergoing exchange reactions (ion exchange) with either cations or anions. See: ion exchange, ion exchanger. (12 Dec 1998) |
| carbacrylamine resins | A mixture of the cation-exchange resin's, carbacrylic resin and potassium carbacrylic resin (87.5%) and of the anion-exchange resin, polyamine-methylene resin (12.5%), used to increase the faecal excretion of sodium in oedema associated with excessive sodium retention by the kidneys, e.g., in congestive heart failure, cirrhosis of the liver, and nephrosis. (05 Mar 2000) |
| cation | <chemistry> A positively-charged ion. (16 Mar 1998) |
| cation-anion difference | <biochemistry> The difference between the sum of the measured cations and anions in the plasma or serum calculated as follows: (Na + K) -(Cl + HCO3) = < 20 mmol/l. Elevated values may occur in diabetic or lactic acidosis; normal or low values occur in bicarbonate-losing metabolic acidoses. Synonym: cation-anion difference. (05 Mar 2000) |
| cation exchanger | An insoluble solid (usually a polystyrene or a polysaccharide) that has negatively charged radicals attached to it (e.g., -COO-, -SO3-), which can attract and hold cations that pass by in a moving solution if these are more attracted to the acid groups than the counter ion present. (05 Mar 2000) |
| cation exhange resin | <chemistry> An insoluble resin with fixed anionic groups which is used in chromatography to separate cationic molecules. (16 Mar 1998) |
| resins | Flammable, amorphous, vegetable products of secretion or disintegration, usually formed in special cavities of plants. They are generally insoluble in water and soluble in alcohol, carbon tetrachloride, ether, or volatile oils. They are fusible and have a conchoidal fracture. They are the oxidation or polymerization products of the terpenes, and are mixtures of aromatic acids and esters. most are soft and sticky, but harden after exposure to cold. (12 Dec 1998) |
| resins, synthetic | Polymers of high molecular weight which at some stage are capable of being molded and then harden to form useful components. (12 Dec 1998) |
| composite resins | Synthetic resins, usually acrylic based, to which a high percentage (usually about 75% to 80%) of an inert filler has been added. Glass beads or rods, borosilicate glass powder, and natural silica are the most commonly used fillers. Filler particles are coated with a coupling agent that binds the particles to the resin matrix. They are used chiefly in dental restorative procedures. (12 Dec 1998) |
| epoxy resins | Thermosetting resins based on the reactivity of the epoxide group, which is characterised by toughness, adhesibility, chemical resistance, dielectric properties, and dimensional stability. Several modified types are used as denture base material. (12 Dec 1998) |
| anion exchange | 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. It 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); combined with cation exchange, NaCl is removed from solution. 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. (05 Mar 2000) |
| anion exchange resin | <chemistry> A resin with fixed cationic groups which is used in chromatography to separate anionic molecules. A High molecular weight, insoluble polymers that contain functional anionic groups capable of undergoing exchange reactions. These resins are used for ion exchange chromatography, as gastric antacids, hypocholesteraemics, etc. (14 Aug 2000) |
| maternal-foetal exchange | Exchange of substances between the maternal blood and the foetal blood through the placental barrier. It excludes microbial or viral transmission. (12 Dec 1998) |
Synonyms : Cation Exchangers (Resins), Exchange Resins, Cation, Resins, Cation Exchange
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