(a.) Destitute of water; as, anhydrous salts or acids.
Example Sentences:
(1) The quantitative effects of theophylline anhydrous upon exercise-induced asthma (EIA) were evaluated in asthmatic children.
(2) A cyclotron target system for the production of anhydrous [18F] fluoride ion has been developed and used for the synthesis of carrier-free [18F]-3-deoxy-3fluoro-D-glucose (3-FDG).
(3) In 30 patients affected with prevalent nocturnal asthma the authors assessed the efficacy of salbutamol (controlled release of osmotic type) compared with anhydrous theophylline (sustained release).
(4) The reaction in anhydrous ethanol of some substituted 2-aminopyrazines with ethyl 2-benzoyl-2-bromoacetate or with ethyl 3-bromo-4-oxopentanoate afforded a group of ethyl 2-phenylimidazo[1,2-a]pyrazine-3-carboxylates and a group of ethyl 2-methylimidazo[1,2-a]pyrazine-3-acetates, respectively.
(5) We compared the effects of treatment of clinical grade hCG powders with anhydrous HF (hydrogen fluoride) or TFMS (trifluoromethane sulfonic acid).
(6) When 1 was treated with anhydrous acid for 16 h both the H-phosphonate diester and the t-BDMSi group remained intact.
(7) The dimethyl ester of bovine pancreatic ribonuclease-A (dimethyl RNAase-A), the initial product of esterification of RNAase-A in anhydrous methanolic HCl, was isolated in a homogeneous form.
(8) The organic phase was dried with anhydrous sodium sulphate before evaporation.
(9) Police have refused to speculate whether the blast was caused by anhydrous ammonia igniting in the heat of the fire, or if there could be a criminal connection.
(10) Eight healthy volunteers received in a cross-over design GTR-80 (300 mg) and the control preparation (350 mg) at single doses - nine volunteers received the solution in a quantity corresponding to 200 mg anhydrous theophylline.
(11) When L-proline or O-benzyl-trans-4-hydroxy-L-proline phenacyl ester was coupled with Boc-amino acids in dimethylformamide using water-soluble carbodiimide (WSCI) in the presence of anhydrous 1-hydroxybenzotriazole (HOBt) as coupling reagents, extensive racemization was observed at the C alpha of the proline or hydroxy-proline residue.
(12) Influence of the injection site on bioavailability in dogs was investigated for injections with ampicillin anhydrate or amoxycillin trihydrate suspensions.
(13) The effect on acne of 6.25 percent aluminum chloride in anhydrous alcohol is probably due to the disinfectant and antiperspirant action of aluminum chloride whereas the effect of placebo can be assigned to the sebostatic action of alcohol.
(14) An extracellular lipase catalyzing the synthesis of macrocyclic lactones in anhydrous organic solvents was purified to homogeneity from Pseudomonas nov. sp.
(15) The addition of water to anhydrous phospholipids has profound effects on the intermolecular interactions and packing order of phospholipid molecules.
(16) On the basis of selective cleavage with anhydrous hydrogen fluoride and analysis by 1H- and 13C-n.m.r.
(17) Extensive clinical and pharmacokinetic evaluation of Uniphyl (anhydrous theophylline) tablets, 400 mg, shows that once-daily morning dosing is at least equivalent to twice-daily administration of theophylline.
(18) Compound 9 was also obtained by condensation of 1 with 2,3,4-tri-O-benzyl-6-deoxy-6-fluoro-beta-D-glucopyranosyl fluoride (4) in the presence of silver perchlorate and anhydrous stannous chloride.
(19) L-3-(3,4-Dihydroxyphenyl)alanine (DOPA) and its 3-O-methyl metabolite (OMD) were measured in plasma and cerebrospinal fluid by a new assay which combines N,O-acetylation of amino acids in aqueous media, preparation of pentafluorobenzyl esters under anhydrous conditions, and analysis by gas chromatography-electron capture negative ion mass spectrometry.
(20) During dehydration, hydrated alpha-form (decahydrate) crystals and beta-form (pentahydrate) crystals became anhydrate gamma-form crystals, with the diffraction angle shifting toward shorter spacing accompanied by line broadening.
Aragonite
Definition:
(n.) A mineral identical in composition with calcite or carbonate of lime, but differing from it in its crystalline form and some of its physical characters.
Example Sentences:
(1) The calcium carbonates-calcite, aragonite, and vaterite-constitute most of the remainder of the calculi.
(2) It is suggested that these substances may be vaterite and aragonite.
(3) Its absence in all analyzed invertebrate tissues (including calcitic, aragonitic, and apatitic mineral phases) indicates that matrix protein-bound gamma-carboxyglutamic acid is not obligatory for the calcification process in the invertebrates.
(4) Skeletal walls of more than one mineralogy have the magnesium-rich layer (calcite) surrounding the living chamber and the strontium-rich layer (aragonite) on the outside.
(5) The biocompatibility of mammal bone with aragonite and calcite skeletons of aquatic invertebrates (Corals, Molluscs) led us, after animal experimentation, to implant in humans artificial dental roots derived from such invertebrates.
(6) Toothpastes contain substances which promote dental health, such as abrasives (silicium dioxide, brushite, calcite, calcite and aragonite, gibbsite etc.
(7) But because cold water absorbs CO2 more quickly, the study predicts that levels of aragonite will fall by 60% to 80% by 2095 across the northern hemisphere.
(8) Aragonite seems to be formed slowly in undisturbed conditions.
(9) A gallstone of almost perfect octahedral symmetry was composed of a mixture of crystallites of the three polymorphous forms of calcium carbonate: calcite, aragonite, and vaterite.
(10) Peak milk yield paralleled dry matter intake and was higher when calcite flour and aragonite provided .9% calcium, intermediate when all sources provided .6% calcium, and lower when albacar provided .9% calcium.
(11) Dumbbell-like concretions of aragonite predominate during pregnancy and pseudopregnancy.
(12) The presence of calcite, aragonite and iron-containing pigment materials in the concretion is suggested.
(13) The variation in the amount of calcium carbonate formed with time was studied by weighing the precipitate, and the percentages of calcite, vaterite, and aragonite were determined by x-ray diffraction (XRD) analysis.
(14) But in our gallstone series in man, aragonite was most commonly found, with an occurrence rate of 90.6%, while that of calcite was 62.5%.
(15) In contrast, the distribution of gamma-carboxyglutamic acid in the vertebrates has been further extended by this study to include an apatitic shark tooth and an aragonitic fish otolith.
(16) Moreover three cases contained all three forms of calcium carbonate polymorphs; calcite, aragonite and vaterite.
(17) Such acidification spells problems for coral reefs, which rely on calcium minerals called aragonite to build and maintain their exoskeletons.
(18) The crystalline phases at the first few lamellae were mostly imperfect while the whole nacreous layer acquitted itself into a highly oriented biomineralized aragonite.
(19) The three cholesterols-cholesterol monohydrate, anhydrous cholesterol, and cholesterol II-account for 71% of the total crystalline material in the stones; the calcium carbonates-vaterite, aragonite, and calcite-contribute 15%, and calcium palmitate contributes 6%.
(20) It says that levels of aragonite, the type of calcium carbonate which is essential for marine organisms to make their skeletons and shells, will fall worldwide.