ammonium

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Related to ammonium ion: Ammonium salt, Quaternary Ammonium Ion

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 ?
With respect to the results found in the in vitro test of qualitative activity of ammonium ion production by endophytic bacteria isolated from colossal grass, values of 0.23 to 1.17 mg/L were found.
Therefore, it is recommended that most of ammonia gas promotes the formation of ammonium ions on the surface of sulfated zirconia.
Among them, high concentration of ammonium ions is the a major pollutant and is harmful to animal and human health and also attacks the water plumbing systems [8].
It can be seen that higher efficiency of ammonium ion removal is achieved by prolonging the period in which sludge liquid remained in the filter.
Ammonium ion and seventeen free amino acids, specifically, alanine (Ala), arginine (Arg), aspartate (Asp), cysteine (Cys), glutamate (Glu), glycine (Gly), histidine (His), isoleucine (Ile), leucine (Leu), lysine (Lys), methionine (Met), phenylalanine (Phe), proline (Pro), serine (Ser), threonine (Thr), tyrosine (Tyr) and valine (Val) were purchased from Sigma-Aldrich (Saint Louis, MO, USA).
Poultry manure supplies nitrogen in form of ammonium ion. The process depends on the amount of manure incorporated into the soil, soil temperatures and amount of soil microbes [31].
Maximal allowable concentrations (MAC) used as limit values are for the III class of water according to the mentioned Regulation, because, respecting national directives only I, II and III class of water can be used for irrigation without prior treatment.Chemical analysis detected high levels of: CODBOD5, organic matter with low degradability(COD/BOD5 ratio 5.7) which results in almost total absence of oxygen, high conductivity, suspended substances, total nitrogen, ammonium ion, orthophosphates, total phosphorus, TOC, arsenic and chromium.Bioassay: The results of bioassay, presented in Table 2, indicate that germination and seedlings early growth were differently affected by total chemistry of the water from Aleksandrovacki canal and mixed pollution.
With ammonium ion as nitrogen source, the removal of Agp1p activity (strain Y294[DELTA]agp1[DELTA]gap1) also affects the total phenylalanine uptake capability, but to a lesser degree.
The spectrum of pure MSDQA (Figure 2(a)) shows the peak whose wave numbers are in the region of 1470 [cm.sup.-1] due to the substance's quaternary ammonium ions. The peaks at 2920 [cm.sup.-1] and 2850 [cm.sup.-1] were characteristic of CH3 and CH2 absorption peaks, respectively.
With nitrogen limitation, occurs activation of AMP deaminase that fills the cell lacking of ammonium ion. As a result, the concentration of mitochondrial AMP decreases, causing the fall of activity of citrate dehydrogenase.
Wu, "Fluorometric determination of ammonium ion by ion chromatography using postcolumn derivatization with o-phthaldialdehyde," Journal of Chromatography A, vol.
Dincel, "Ammonium ion adsorption with sepiolite: use of transient uptake method," Chemical Engineering and Processing, vol.