(n.) Calcium fluoride, a mineral of many different colors, white, yellow, purple, green, red, etc., often very beautiful, crystallizing commonly in cubes with perfect octahedral cleavage; also massive. It is used as a flux. Some varieties are used for ornamental vessels. Also called fluor spar, or simply fluor.
Example Sentences:
(1) Animal experiments showed that calcium fluorite can induce only a foreign body reaction in the lungs; the fibrous nodular lesions induced by the fluorite mine dust are due mainly to its silica component.
(2) On the basis of the investigations a complex filter made of silver plated minerals--dolomite and fluorite--has been developed.
(3) NMR analysis showed FAP or FHAP as a reaction product of fluoride uptake under all conditions, regardless of whether CaF2 was formed, unambiguously demonstrating fluorite as an additive rather than substitute form of F reactivity.
(4) The occurrence of fluorite in mysid statoliths confirms the earlier interpretations based on insufficient documentation.
(5) It was also demonstrated that having engulfed calcium fluorite, silica, or fluorite mine mixed dust, PAMs release an elastase-active substance.
(6) Use of acetyl hypo[18F]fluorite gives [18F]-4 in 60 min in 20-42% radiochemical yield.
(7) The environmental survey included measurements of the dust respirable fraction and fluorite concentration in the air.
(8) The authors suggest that the emphysematous lesion seen in autopsy material of pneumoconiosis of fluorite mine workers may be caused by calcium fluorite and silica.
(9) A compact autosynthesizer was developed and used successfully for the production of 2-deoxy-2-[18F]fluoro-D-glucose [18FDG] from gaseous acetyl hypo[18F]fluorite.
(10) X-ray diffraction patterns show that the statoliths of marine mysid crustaceans are composed of fluorite, and that this mineral is also a principal phase of the gizzard plates of some tectibranch gastropods.
(11) At pH's less than 5.0 to 6.0 the solubility product of fluorite, and not that of fluorapatite, is the governing principle under the experimental conditions used.
(12) It was demonstrated that either silica or the mixed dust of a fluorite mine can stimulate pulmonary alveolar macrophages (PAMs) to release fibrogenetic factors in vitro, but calcium fluorite cannot.
(13) Furthermore, fluorite (CaF2) makes the slag more fluid.
(14) The authors investigated the influence of working conditions--with particular reference to dust and fluorite pollution--on the epidemiology of chronic bronchitis in 197 subjects working in a fertilizer producing plant in Krakow (Poland).
(15) The pathogenicity of mixed dust from a fluorite mine was studied by animal experiments and in vitro tests.
(16) The unit has been similarly configured and programmed to synthesize 2-deoxy-2-[18F]fluoro-D-mannose (48% EOB), 3-(2'-[18F]fluoroethyl)spiperone (29% EOB), and [18F]fluoroacetate (66% EOB) from aqueous [18F]-fluoride ion, and 2-[18F]FDG from gaseous acetyl hypo[18F]fluorite (20% EOB).
(17) All sample fumes from low hydrogen welding in several atmospheric conditions contained fluorite (CaF2).
Flux
Definition:
(n.) The act of flowing; a continuous moving on or passing by, as of a flowing stream; constant succession; change.
(n.) The setting in of the tide toward the shore, -- the ebb being called the reflux.
(n.) The state of being liquid through heat; fusion.
(n.) Any substance or mixture used to promote the fusion of metals or minerals, as alkalies, borax, lime, fluorite.
(n.) A fluid discharge from the bowels or other part; especially, an excessive and morbid discharge; as, the bloody flux or dysentery. See Bloody flux.
(n.) The matter thus discharged.
(n.) The quantity of a fluid that crosses a unit area of a given surface in a unit of time.
(n.) Flowing; unstable; inconstant; variable.
(v. t.) To affect, or bring to a certain state, by flux.
(v. t.) To cause to become fluid; to fuse.
(v. t.) To cause a discharge from; to purge.
Example Sentences:
(1) It is concluded that amlodipine reduces myocardial ischemic injury by mechanism(s) that may involve a reduction in myocardial oxygen demand as well as by positively influencing transmembrane Ca2+ fluxes during ischemia and reperfusion.
(2) The main finding of this study is that diabetic adolescents with a high erythrocyte Na,Li countertransport rate have an arterial pressure significantly higher than patients with normal Na,Li countertransport fluxes.
(3) The role of adrenergic agents in augmenting proximal tubular salt and water flux, was studied in a preparation of freshly isolated rabbit renal proximal tubular cells in suspension.
(4) The effect of the peptides on carbachol-induced 22Na+ flux into BC3H-1 cells, which contain nicotinic acetylcholine receptors on their surfaces, was measured.
(5) Previous evidence includes changes in Ca2+ fluxes and intracellular activity, membrane potential changes, and effects of ion-channel blockers.
(6) The inhibition by DCMU of palmitoylcarnitine oxidation by isolated liver mitochondria was used to calculate a flux control coefficient of the respiratory chain towards gluconeogenesis.
(7) Under anaerobic conditions, glycolytic flux was decreased but this did not appear to be the result of inhibition of phosphofructokinase, since the concentrations of both substrates, fructose 6-phosphate and ATP, were decreased.
(8) By contrast, there was a rapid exchange of tracer Leu carbon between placenta and fetus resulting in a significant flux of labeled KIC from placenta to fetus.
(9) The current work utilizes an empirical relationship between HbO2 saturation measurements and reflected light oximetry, which is consistent with the two-flux theory of Kubelka and Munk (Z.
(10) The proportion of L-tryptophan metabolized via the latter flux increased over 10-fold (75% of total tryptophan metabolized) as the concentration of L-tryptophan was raised from 5 x 10(-5) to 5 x 10(-4) M. L-Tryptophan metabolized via the kynureninase flux was less than 5% of total tryptophan metabolized.
(11) The momentum flux theory describes such phenomena most appropriately.
(12) A state of net secretory fluid flux was induced in isolated jejunal loops in weanling pigs by adding theophylline or cholera toxin to the lumen of the isolated loops.
(13) The unidirectional Cl- fluxes may have significant contributions from both the transcellular and paracellular pathways, with the direction of departure from predicted values being consistent with the presence of Cl- exchange diffusion.
(14) cAMP decreased the incorporation of choline into phosphatidylcholine, but did not change the flux of metabolites through the step catalyzed by CTP:phosphocholine cytidylyltransferase.
(15) This was apparent by standard flux techniques only in low (65 mM) Na solutions, but was readily discernible in normal Na (125 mM) with the "lanthanum-residual" technique.
(16) But prealbumin-2, which has lower affinity towards thyroxine, participates mainly in a rapid flux of the free thyroxine pool.
(17) In the patients with aplastic anaemia the iron flux was diminished, but never eliminated, demonstrating that the exchangeable compartment was not solely erythroblastic, but included non-erythroid transferrin receptors.
(18) Outward Na+ cotransport fluxes significantly rose (p less than 0.05) after acetate hemodialysis and decreased (p less than 0.05) after bicarbonate hemodialysis.
(19) This "flux inhibition" was found to depend upon the velocity and the duration of water flow from mucosa to the serosa.
(20) In the microsac preparation, the PKC activators (-)-7-octylindolactam V and PMA inhibited the sustained phase of 36Cl- flux without altering the transient phase.