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 ?
Marandu, cultivated in soil with liming and fertilized with single superphosphate and urea had the same production of shoot part and leaf blades of the grass cultivated in soil without liming and fertilized with reactive natural phosphate and ammonium sulfate. This demonstrates that the natural acidity of the Oxisol (Table 1) associated to the acidification resultant from the nitrification of the ammonium (Table 3) in the soil is capable to achieve that the reactive natural phosphate reaches the same efficiency of a soluble source of phosphorus.
Population peaks were observed in the 9th evaluation in most treatments, except in conditions of absence sulphur (0 kg/ha [(N[[H.sub.4]).sub.2] S[O.sub.4]] or 0 kg/ha CaS[O.sub.4]), and when applied calcium sulfate, with ammonium sulfate following concentrations 208 kg/ha [(N[[H.sub.4]).sub.2] S[O.sub.4]] + 0 kg/ha (CaS[O.sub.4]); 208 kg/ ha [(N[[H.sub.4]).sub.2] S[O.sub.4]] + 750 kg/ha (CaS[O.sub.4]); 0 kg/ha [(N[[H.sub.4]).sub.2] S[O.sub.4]] + 1,500 kg/ha (CaS[O.sub.4]); 208 kg/ha [(N[[H.sub.4]).sub.2] S[O.sub.4]] + 1,500 kg/ha (CaS[O.sub.4]) and 312 kg/ha [(N[H.sub.4])2S[O.sub.4]] + 1,500 kg/ha (CaS[O.sub.4]).
Lowest weed dry weight obtained after adding Volck oil (8.533 g) or ammonium sulfate (7.400 g) to nicosulfuron, and highest one belonged to control (14.10 g) and atrazine application (13.10 g) treatments (Fig.
Similarly, analysis of the sample doped with ammonium sulfate was also performed (fig.
quinquefasciatus larvae were transferred to larval pans (23 x 29 cm) containing 0.422 g, 0.845 g, 1.2675 g and 1.690 g of either muriate of potash or ammonium sulfate dissolved in one litre of deionised water.
In brief, we treated plasma samples with ammonium sulfate (50% of saturation) at 4[degrees]C, and after centrifugation, we measured testosterone in supernatant by RIA after organic extraction and diatomaceous earth (Celite) purification.
In an upcoming Proceedings of the National Academy of Sciences, Thomas and Raja say that their catalyst can produce caprolactam without requiring sulfuric acid or generating ammonium sulfate.
Run a blank titration on25 ml of the ferrous ammonium sulfate solution, as used above, in 50ml of water and 5ml of 25% sulfuric acid.
Nitrogen sources for rice production commonly include urea and ammonium sulfate; however, Japanese rice production relies almost exclusively on ammonium chloride (Tisdale et al., 1985).
Farmers previously using ammonium nitrate fertilizer now must use ammonium sulfate, urea or other nitrogen fertilizers such as potassium nitrate, calcium nitrate and sodium nitrate.
The flagella were separated from outer membrane proteins and other contaminants by precipitation with 60% saturation of ammonium sulfate for 18 h at 4[degrees]C.