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 ?
ESI LC MS/MS of PROP and its TP: A reversed phase LC method was developed for separation of PROP and its TPs, employing an Xterra MS C18 column (100 x 4.6 mm; 5 um, Waters, Hertfordshire, UK) and a mobile phase comprising 0.01 M ammonium acetate (A) and methanol (B).
Ordinarily, the ratio between the quantity adsorbed and the amounts remain in solution at stable temperature at equilibrium, is employed to define isotherm [35] In this study, the adsorption isotherm study was conducted at room temperature using 50 mg of the chelating resin mixed with different concentrations of the tested ions in the rang 0.2-1.5 mg/l (prepared in ammonium acetate buffer at pH 6).
Table S1: the comparison of retention times and peak resolutions of investigated alkaloids in 30% of acetonitrile in water at different pH and ammonium acetate concentration.
A mixture of benzil (1 mmol), aldehyde (1 mmol), ammonium acetate (2 mmol), and Rochelle salt (10 mol%) was taken in a beaker (50 mL).
(2005) analyzed samples of vegetables types A and B for total zinc content by atomic absorption spectrometry in flame (FAAS), and the method of sequential extraction was applied with the following extractors: 1M calcium chloride, 0.1M acetic acid / 5% ammonium acetate (pH 5.0), 0.5M acetic acid, 0.5 hydrochloric acid.
The major problem of the soil is its salinity and high sodium content and the soil can be characterised as sodic soil as the Na content in ammonium acetate extract is more than 15% of total extractable cations.
A portion of the LW fraction (114 mg) was separated on an anion-exchange column (Carbopac PA1) using a gradient of ammonium acetate buffer as eluent.
An aerosol of the precursor solution, which consisted of zinc acetate, ammonium acetate, and YAG phosphor (at 1wt.%; NYAG4156 phosphor, INTEMATIX, Fremont, CA, USA) powder, was produced using a commercial ultrasonic nebulizer.
The column was equilibrated and washed with equilibration buffer (0.01 M ammonium acetate pH=4.5 containing 50 mM NaCl) and washing buffer (0.02 M ammonium acetate pH=5.2 containing 0.1 M NaCl), respectively.
Ammonium acetate and formic acid with HPLC grade were brought from Waters Company (America).Water was purified in-house using a Millipore Milli-Q water purification systems (Millipore, Volketswil, Switzerland).
Designed for use with the existing Optima solvent range, these new reagents, comprising ammonium formate, ammonium acetate and acetic acid, improve chromatographic peak shape and provide stable analyte signals in a MS detector.