ammonium

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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.
References in periodicals archive ?
The reason for this could be the use of ammonium oxalate, which is a weak organic acid and calcium-chelating agent.
juncea shoots was increased with the addition of the HCl and a mixture containing ammonium oxalate, oxalic acid, and ascorbic acid to the soil after 6 weeks of plant growth.
There was little evidence of land use impact on plant-available P (Mehlich 1 P), HCl P as measured using ICP, and ammonium oxalate P, suggesting that these P fractions may not be useful indicators of P impacts.
(2002) showed that only a fraction of water treatment residual total Al and Fe was extractable with ammonium oxalate (only 16 to 45 percent of total Fe and 45 to 80 percent of total Al was extractable with ammonium oxalate) which is important since ammonium oxalate extractable Al and Fe is considered an indicator of P sorption potential in water treatment residual (Dayton and Basta, 2005).
Aluminium and iron extracted from the soil by ammonium oxalate were measured using a procedure similar to that of Schwertmann (1964).
1971), ammonium oxalate (0.2) mol/L, pH 3.0, 4 h in dark) (McKeague and Day 1966), and DCB (Mehra and Jackson 1960), respectively, and determined with a Perkin-Elmer Model 5000 atomic absorption spectrophotometer.