(n.) A gaseous compound of hydrogen and nitrogen, NH3, with a pungent smell and taste: -- often called volatile alkali, and spirits of hartshorn.
Example Sentences:
(1) This method provided myocardial perfusion images of high quality which were well correlated with N-13 ammonia images.
(2) Studies were performed to characterize the determinants of proximal tubule ammonia entry (and retention) in vivo.
(3) Confirmation of the striking correlation between increased urinary ammonia and lowered neonatal ponderal index may afford a simple test for the identification of nutrient-related growth retardation.
(4) However, almost all of the numerous compounds found to inhibit ammonia oxidizers also inhibit methanotrophs, and most of the inhibitors act upon the monooxygenases.
(5) An otherwise progressive rise in blood ammonia concentration was halted in the treatment group.
(6) The high rate of H pylori ammonia production in uraemic patients should accentuate any ammonia induced effects.
(7) The determination of ammonia in plasma, using glutamate dehydrogenase, is complicated by non-specific oxidation of the coenzyme, promoted by components of the sample matrix.
(8) The methanol-ammonia (20:1) and chloroform-methanol-ammonia (2:2:1) systems, used with silica-gel plates, are the most promising for rapid preliminary screening of tuna fish extracts for histamine.
(9) The effect of ammonia is partially reversed by nitrate.
(10) The addition of glutamine or ammonia increased glycine incorporation of control cultures, but failed to do so in treated cultures.
(11) Plasma dextrose and bicarbonate declined in concentration while potassium, lactate, LDH, ammonia, and hemoglobin rose with storage.
(12) The changes were proportional to the concentration and duration of ammonia treatment.
(13) The Km for ammonia of carbamyl phosphate synthetase was determined by preincubating isolated liver cells for 30 min in the absence of ammonia and bicarbonate and in the presence of ornithine, chloroquine, which blocks lysosomal proteolysis, and aminoxy acetic acid, which inhibits transaminases.
(14) The highest predictive values for the exclusion of TiC are shown by inconspicuous concentration capacity accompanied by normal ammonia excretion, total acid excretion, water diuresis, free water clearance or urine dilution capacity.
(15) All dogs were evaluated at the beginning of the study by complete physical examination; total and differential WBC counts; serum biochemical analysis (alanine transaminase and alkaline phosphatase activities and bilirubin and albumin concentrations); sulfobromophthalein excretion, ammonia tolerance, and glucagon response testing; portal and intraparenchymal pressure determinations; operative mesenteric portography; and histologic assessment of hepatic biopsy specimens.
(16) The significant differences (p=0.001) are found by lysine, ammonia, histidine, arginine, threonine, glutaminic acid, and phenyl alanine.
(17) Formation of anthranilate will proceed in the presence of partially pure subunit I provided ammonia is available in place of glutamine.
(18) Net synthesis of microbial N (Nn) was calculated from ammonia-N incorporation.
(19) Attachment of sufficient quantities of PEG to phenylalanine ammonia-lyase substantially reduces immunological recognition and clearance of the conjugated enzyme in mice.
(20) No direct relationship exists between glutamate dehydrogenase (NADP+) and glutamate-ammonia ligase in P. denitrificans, while the glutamate synthase (NADPH) activity changes in parallel with that of the latter enzyme.
Ammonium
Definition:
(n.) A compound radical, NH4, having the chemical relations of a strongly basic element like the alkali metals.
Example Sentences:
(1) Thus, saponin and ammonium chloride can be used to isolate whole infected erythrocytes, depleted of hemoglobin, by selective disruption of uninfected cells.
(2) Both SAA and non-SAA enhanced ammonium excretion but only non-SAA enhanced organic anion excretion, an indicator of incomplete oxidation of organic acids.
(3) Substrate availability or accumulations of lactate and ammonium could have significant roles.
(4) The first step is the preparation of a globulin-enriched fraction by precipitation with ammonium sulfate at 50% saturation, or of an immune-complex-enriched fraction by precipitation with 5% polyethylene glycol 6000.
(5) The enzyme extracted from strains containing the recombinant plasmid was identical to N. crassa catabolic dehydroquinase by the criteria of heat stability, ammonium sulfate fractionation, immunological crossreactivity, molecular weight, and purification characteristics.
(6) Hydropathic analysis of the inferred amino acid sequence of the gene product predicts that amtA encodes a cytoplasmic component of the ammonium transport system.
(7) Ratfish serum proteins have been fractionated by ammonium sulfate, followed by gel filtration on Sepharose 6B.
(8) The relationship between urine pH, modified by the oral administration of either ammonium chloride or sodium bicarbonate, and the urinary excretion of prostaglandin E (PGE) was studied in healthy female subjects.
(9) These results suggest that ammonium ions influence the appetite through their effect on prepyriform cortical areas.
(10) Murine liver extract (LEx) purified by ammonium sulfate (45-70% saturation) possesses a strong inhibitory effect on human lymphocyte proliferation.
(11) The method was based on a pre-column reaction; a fluorescent substance was formed by a coupling reaction between 2 mol of cyclohexan-1,3-dione and 1 mol of acetaldehyde with ammonium acetate.
(12) The purification involved the following steps: (a) ammonium sulfate fractionation; (b) Sephadex G-100 chromatography; (c) DEAE-cellulose chromatography; and (d) hydroxylapatite chromatography.
(13) Two additional quaternary ammonium compounds, tetraethylammonium and N1-methylnicotinamide, were not significantly bound to either tissue.
(14) These effects are due to residual silanols on the surface of the column material and may be remedied by adding suitable amines or quaternary ammonium ions to the eluent as anti-tailing agents.
(15) The crystals grow from solutions of ammonium sulfate during growth periods from several months to a year.
(16) A quantitative thin layer chromatographic (TLC) method has been developed for determination of the antiarrhythmic quaternary ammonium compound N,N-bis (phenylcarbamoyl methyl) dimethylammonium chloride (QX-572) in biological materials.
(17) While currently available antiarrhythmic agents fail to achieve the desired effect, the recent evidence dealing with the quaternary ammonium derivatives of propranolol, lidocaine, and bretylium provides some hope for the future development of drugs with antiarrhythmic as well as antifibrillatory properties which may provide a therapeutic approach to the prevention of SCD.
(18) Ammonium sulphate fractionation followed by immunoaffinity chromatography on a three column system using Protein A-Sepharose coupled D5, produced purified p29.
(19) (a) Ammonium sulphate precipitation and gel filtration on Sepharose 4B.
(20) Separation of bound and free lactoferrin was accomplished by either of two procedures, a double-antibody technique or precipitation in the presence of 50% saturated ammonium sulfate.