What's the difference between ammonia and hexamine?
Ammonia
Definition:
(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.
Hexamine
Definition:
Example Sentences:
(1) Actinomycin inhibits Mbo I activity in the presence of cobalt hexamine but not in the absence.
(2) At temperatures of 200-300 degrees C hexamine decomposition is reported to produce mainly ammonia and formaldehyde.
(3) Knee joint menisci from osteoarthritic and rheumatoid knees were analyzed for nitrogen, collagen, non-collagenous proteins (NCP) and hexamine content.
(4) BZ-IV is equally digestible in the presence and absence of cobalt hexamine by Hha I, further indicating that the structure of BZ-IV is fully B-like under these conditions.
(5) The available literature on hexamethylenetetramine (hexamine) was reviewed with emphasis on its toxicology and epidemiology, its thermal decomposition and regulatory concerns related to its uses.
(6) Hexamine was also found in biological samples taken from victims of the Damascus attacks, and soil samples taken from the scene.
(7) In order to preserve and enhance the visibility of negatively charged tissue components, particularly the glycosaminoglycan-containing proteoglycans, the cationic stains ruthenium red (RR) and ruthenium hexamine trichloride (RHT) were used.
(8) At neutral pH in the presence of Co hexamine, both strands of the insert have modification maxima situated at one-third of the distance from both ends.
(9) Globule leucocytes in two goats were positive for argentaffin reaction with Gomori hexamine silver stain.
(10) Hexamine cobalt chloride (HCC) increases the efficiency of blunt end ligation by T4 DNA ligase about 50 fold.
(11) The kinetics of electron transfer between cytochrome-c oxidase and ruthenium hexamine has been characterized using the native enzyme or its cyanide complex either solubilized by detergent (soluble cytochrome oxidase) or reconstituted into artificial phospholipid vesicles (cytochrome oxidase-containing vesicles).
(12) Morphological examination of incubated tissue after fixation in the presence of ruthenium hexamine trichloride (RHT) (included to preserve PG in situ) revealed, however, that the PG staining profiles across cartilage matrix varied with the composition of the incubation medium used.
(13) Fixation with ruthenium hexamine trichloride (RHT) and embedding in LR White served to preserve chondrocytes in the expanded state and matrix proteoglycans were observed as a reticular network of filaments.
(14) The effect of the simultaneous administration of hexamine mandelate and methionine on the urinary excretion of calcium, magnesium and phosphate is reported in 3 groups of paraplegic patients.
(15) Although hexamine produces a positive Ames test, most animal studies have shown hexamine to be of very low genetic risk even in very high doses.
(16) A new method for morphological diagnosis of various forms of amyloidosis based on the use of a hot buffered hexamine-silver solution is suggested.
(17) The results of gel mobility studies in the absence and presence of cobalt hexamine indicate that a B-Z junction corresponds to a stiff bend of the helix axis, with two or more conformers accessible at the junction site.
(18) The studies reviewed are in general agreement that hexamine thermal decomposition in the temperature range of 300-800 degrees C is characterized by an increase in HCN and a decrease in NH3 emissions with increasing temperature.
(19) With pentaethylene hexamine, when used alone, it is possible to create a linear pH 4-10 interval, provided the molarity ratios are altered in the two chambers of the gradient mixer.
(20) The effectiveness of hexamine as an antibacterial agent has been attributed to its slow hydrolysis to ammonia and formaldehyde.