(n.) A mineral of a white or a slightly bluish color, usually massive. It is anhydrous sulphate of lime, and differs from gypsum in not containing water (whence the name).
Example Sentences:
(1) The second shrinkage between 300 degrees C and 400 degrees C was due to the transformation of soluble anhydrite to insoluble anhydrite.
(2) However, the SEM observations of the fractured surface of compacts suggested that the second shrinkage corresponded to the grain growth of insoluble anhydrite.
(3) The third shrinkage beginning at the temperature range 700 degrees C approximately 800 degrees C is considered to be related to the sintering of insoluble anhydrite.
(4) The sintering kinetics of insoluble anhydrite were studied by measuring the isothermal shrinkage of compacts of insoluble anhydrite powders in air.
(5) The dehydration of gypsum (calcium sulfate dihydrate) was not completed until the initial stage of this large shrinkage was reached, but the phase transition of calcium sulfate anhydrite (III-CaSO4 to II-CaSO4) was the major cause for the large shrinkage.
Anhydrous
Definition:
(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.