cation-exchange resin

cation-exchange resin

n.

An insoluble organic polymer having negatively charged radicals attached to it that can attract and hold cations in a surrounding solution.

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cation-exchange resin,

any one of various insoluble organic polymers with high molecular weights that exchange their cations for other cations in solution. Cation-exchange resins are used especially to restrict intestinal sodium absorption in patients with edema. Compare anion-exchange resin.

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cation

a positively charged ion.

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cation-anion balance

the balance in serum or plasma between the anions and cations must equilibrate near to the level of 155 mEq/l. Estimation of any imbalance, usually by chloride and bicarbonate measurement, is basic to any determination of acid-base abnormality.

cation channels

channels through selectively permeable membranes via which only cations can migrate.

dietary cation-anion difference

prepartum has a major influence on the incidence of hypocalcemia (milk fever) in dairy cattle and, in the control of the disease, is manipulated so as to result in a metabolic acidosis which facilitates the mobilization of calcium. Defined as milliequivalents of (Na+K)-(Cl+S) per kg DM diet.

cation-exchange resin

ion-exchange resin.

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resin

1. a solid or semisolid, amorphous organic substance of vegetable origin or produced synthetically. True resins are insoluble in water, but are readily dissolved in alcohol, ether and volatile oils.

2. rosin.

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acrylic r's

products of the polymerization of acrylic or methacrylic acid or their derivatives and used in the fabrication of surgical prostheses and equipment.

anion-exchange resin

see ion-exchange resin.

cation-exchange resin

see ion-exchange resin.

cholestyramine resin

a synthetic, strongly basic anion-exchange resin in the chloride form which chelates bile salts in the intestine, thus preventing their reabsorption.

composite resin

usually a mixture of organic matrix and inorganic filler, used in restorative dentistry.

ipomoea resin, jalap resin, scammony resin

severe cathartics and irritants; little used because of their disastrous effects.