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ammonium
am·mo·ni·um A0258500 (ə-mō′nē-əm)n. The univalent chemical ion NH4+, derived from ammonia, whose compounds chemically resemble the alkali metals.
[ammon(ia) + -ium.]ammonium (əˈməʊnɪəm; -njəm) n (Chemistry) (modifier) of, consisting of, or containing the monovalent group NH4– or the ion NH4+: ammonium compounds. am•mo•ni•um (əˈmoʊ ni əm)
n. the univalent ion, NH4 + , or group, NH4, which plays the part of a metal in the salt formed when ammonia reacts with an acid. [1808;< New Latin; see ammonia, -ium2] am·mo·ni·um (ə-mō′nē-əm) A positively charged ion, NH4, derived from ammonia and found in a wide variety of organic and inorganic compounds.Thesaurus| Noun | 1. | ammonium - the ion NH4 derived from ammonia; behaves in many respects like an alkali metal ionammonium ionammonia - a pungent gas compounded of nitrogen and hydrogen (NH3) |
Translationsammonium
ammonium [ah-mo´ne-um] a hypothetical radical, NH4, forming salts analogous to those of the alkaline metals.ammonium carbonate a mixture of ammonium compounds used as a liquefying expectorant in the treatment of chronic bronchitis and similar lung disorders. It is sometimes used as a reflex stimulant in “smelling salts” because of the strong ammonia odor it gives off.ammonium chloride colorless or white crystals, with a cool, salty taste, used as an expectorant because it liquefies bronchial secretions. In the body it is changed to urea and hydrochloric acid, and thus is useful in acidifying the urine and increasing the rate of urine flow. Excessive dosage may produce acidosis.ammonium lactate lactic acid neutralized with ammonium hydroxide, applied topically in the treatment of ichthyosis vulgaris and xerosis.am·mo·ni·um (ă-mō'nē-yŭm), An ion, NH4+, formed by combining NH3 and H+ (the pKa value is 9.24); acts as a univalent metal in forming ammonium compounds.storage lesion Transfusion medicine The constellation of changes occurring in a unit of packed red cells during storage. See Red cell preservatives. Storage lesions ↑ Ammonium to 470 µmol/L–US: 800 µg/dL ↑ Free Hb in plasma from 82 to 6580 mg/L–US: 8.2 to 658 mg/dL ↑ K+ from 4.2 to 78.5 mmol/L–US: 4.2 to 78.5 mEq/L ↓ ATP from 100% to 45% ↓ 2,3 DPG to < 10% of original levels–replenished within 24 hours of transfusion ↓ Labile proteins, eg complement, fibronectin and coagulation factors ↓ to negligible ↓ Na+ from 169 to 111 mmol/L–US: 169 to 111 mEq/L ↓ pH from 7.6 to 6.7 Adverse physiologic effects of stored blood is negligible in the absence of a previous compromise of the Pt's–recipient's status am·mo·ni·um (ă-mō'nē-ŭm) The ion, NH4+, formed by combination of NH3 and H+; behaves as a univalent metal in forming compounds. ammonium
Related to ammonium: ammonium nitrate, ammonia, ammonium alum, ammonium oxalate, Ammonium persulfateSynonyms for ammoniumnoun the ion NH4 derived from ammoniaSynonymsRelated Words |