(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.
Snuff
Definition:
(v. t.) The part of a candle wick charred by the flame, whether burning or not.
(v. t.) To crop the snuff of, as a candle; to take off the end of the snuff of.
(v. i.) To draw in, or to inhale, forcibly through the nose; to sniff.
(v. i.) To perceive by the nose; to scent; to smell.
(v. i.) To inhale air through the nose with violence or with noise, as do dogs and horses.
(v. i.) To turn up the nose and inhale air, as an expression of contempt; hence, to take offense.
(n.) The act of snuffing; perception by snuffing; a sniff.
(n.) Pulverized tobacco, etc., prepared to be taken into the nose; also, the amount taken at once.
(n.) Resentment, displeasure, or contempt, expressed by a snuffing of the nose.
Example Sentences:
(1) The relatively high levels of potentially carcinogenic TSNA in the saliva, together with the current popularity of snuff usage by teenagers, is of particular concern.
(2) Individual effects of tobacco on, a.o., the blood vessel supply of the oral mucosa were, thus, documented photographically every five minutes after cigarette smoking and snuff-dipping respectively in three healthy volunteers, aged 45, 35 and 30 years.
(3) The use of smokeless forms of tobacco, such as snuff and chewing tobacco, is growing at alarming rates.
(4) The dose-response relationship between pancreatic bicarbonate production and varying doses of synthetic secretin administered intravenously and in the form of snuff, was good.
(5) Twenty-nine subjects, 3 showing Degree 2 lesions, 21 Degree 3 lesions and 5 Degree 4 lesions, all of them loose snuff users were identified.
(6) These data confirm that a water-soluble extract of snuff has anti-cytolytic and anti-proliferative effects on peripheral blood lymphocytes.
(7) During the last ten years, over 900 samples of foods, snuff and other products on the Swedish market were analysed for N-nitrosamines.
(8) 184 using exclusively loose and 68 portion-bag snuff.
(9) Most of the snuff brands were rich in nitrate (greater than or equal to 1.5%), total polyphenols (greater than 2%), and in nicotine (greater than or equal to 1.5%), which is the habituating factor in tobacco use.
(10) Based on 133 cases diagnosed between 1976-1982 and 948 controls, there were significant excesses associated with use of the drug chloramphenicol (odds ratio (OR) = 5.4, 95% confidence interval (Cl) 1.2-23.9) and chewing tobacco or snuff (OR = 1.8, 95% Cl 1.1-2.9).
(11) Smokeless tobacco (chewing tobacco and snuff) contains known carcinogens shown to increase the risk for oral cancer.
(12) However, the formation of N-nitrosoproline in cigarette smokers and snuff dippers proves that smoke and snuff have a measurable potential for the endogenous formation of carcinogenic nitrosamines.
(13) It was found that 50 (81%) of the 62 questioned patients used snuff in the form of saffa.
(14) Various Indian tobacco products--cigarette, bidi, chutta and their smoke, chewing tobacco and snuff (used for inhalation as well as a dentifrice) were analysed for their content of tobacco-specific nitrosamines (N'-nitrosonornicotine, 4-(N-nitrosomethylamino)-1-(3-pyridyl)-1-butanone and N'-nitrosoanatabine) by means of a gas chromatograph interfaced with a thermal energy analyser.
(15) After 3000 chewing strokes on each plate, the wear of the plate used while chewing snuff was significantly less compared to the plate used while chewing with nothing in the mouth.
(16) To estimate the risk of myocardial infarction in snuff users, cigarette smokers, and non-tobacco users in northern Sweden, where using snuff is traditional.
(17) Loose snuff users showed predominantly histologic Type 1 changes while portion-bag users showed more histologic Type 2 or only very discrete changes.
(18) The response of the human pancreas to varying doses of pure synthetic secretin administered intravenously and, for comparison, 8 days later in the form of snuff was examined, intraindividually, in 10 healthy test subjects.
(19) The suppression of ulcers was most evident for those groups smoking pipe or cigarettes without filter and only moderate for those using snuff.
(20) Why, it's Sepp Maier demonstrating how to use a snuff feather, of course.