(n.) The metallic base of alumina. This metal is white, but with a bluish tinge, and is remarkable for its resistance to oxidation, and for its lightness, having a specific gravity of about 2.6. Atomic weight 27.08. Symbol Al.
Example Sentences:
(1) Examination on day 9 and 15 the magaldrate group showed significantly (p less than 0.05) lower aluminium levels than the aluminium hydroxide group.
(2) Al added as AlCl3 or aluminium citrate had no effect, and there was no significant difference in the response of cells from renal failure patients with or without high serum Al levels or controls.
(3) These experimental results demonstrate that aluminium interferes with iron absorption and iron transfer, and suggest that these mechanisms may be responsible for maintaining and even increasing the anaemia observed in aluminium overload.
(4) The latter compounds were reduced with lithium aluminium hydride to the respective amines (II a-c) and then N-alkylated by reaction with 2-propynyl-, 2-butynyl- or 2,3-butadienyl bromides to the corresponding amines (III a-j).
(5) 47 children were immunized in 1968 and 1969 during the first year of life with 3 injections of aluminium free triple vaccine given with an interval of 4--6 weeks.
(6) Rabbits fed a cholesterol-rich diet developed atherosclerosis after 3 months and these rabbits possessed high concentrations of calcium, phosphorus and aluminium in the central nervous system, determined by neutron activation analysis.
(7) These findings suggest that although in rats with normal renal function aluminium absorption appears to be partly vitamin D dependent, 1,25(OH)2D3 does not further augment the enhanced gastrointestinal absorption of aluminium in uraemia.
(8) The entrance window is 12 microns Melinex foil with a thin aluminium surface.
(9) For inactivation of rad54-3 mutant cells, the r.b.e.-values relative to 60Co gamma-rays were 2.6 and 2.4 for carbon K and aluminium K X-rays, respectively.
(10) The absorption of factor VIII from gel filtration fractions, concentrates and plasma by aluminium hydroxide has been studied.
(11) Lymphocytes cultured in the presence of Al-Tf showed a dose-dependent uptake of Al, whereas uptake from aluminium citrate was low and not dose-dependent.
(12) Very small PVC particles, polymerized by the emulsion process, were mounted on an aluminium adhesive tape and pressed with a similar tape.
(13) The antibody responses of animals immunised with keyhole limpet hemocyanin (KLH) in Freund's Incomplete Adjuvant (FIA), diethylaminoethyl dextran (DEAE-dextran) and aluminium hydroxide (alum) were compared with the response to antigen administered in the absence of adjuvants.
(14) to aluminium chronic poisonning; the source of the aluminium intoxication is not aluminium containing phosphate-binding gels but intravenously administreted tape-water.
(15) Bile acids were extracted from serum samples by chromatography on Amberlite XAD-2 and, after alkaline or enzymic hydrolysis, purified by chromatography on aluminium oxide.
(16) As new aluminium equals energy use and environmental destruction, this raises the question: why can't computers be made from recycled aluminium, given that this uses 95% less energy?
(17) In a multicentre study, 146 peptic ulcer patients who had recently healed with H2 antagonists (38 gastric, 108 duodenal ulcers) received randomly for a year one of the following mucosal protecting antiulcer drugs: aceglutamide aluminium salt (AAL), zinc acexamate (ZAC) and magaldrate (MAG).
(18) It permits the absorption of aluminium in amounts similar to aluminium-containing antacids, and toxicity has been demonstrated in the presence of renal insufficiency.
(19) The method consisted first in preconcentrating the samples collected on immersed gauze pads, secondly in the concentration of the virus samples by the following methods-used either separately or in parallel: the Amberlite method, the yeast cell and the aluminium bydroxide concentration method.
(20) The concentrations of 17 trace elements (e.g., copper, cobalt, iron, manganese, chromium, silicon and magnesium) were determined in whole blood samples of 81 persons working with different welding methods on stainless steel or aluminium and 68 nonwelders.
Corundum
Definition:
(n.) The earth alumina, as found native in a crystalline state, including sapphire, which is the fine blue variety; the oriental ruby, or red sapphire; the oriental amethyst, or purple sapphire; and adamantine spar, the hair-brown variety. It is the hardest substance found native, next to the diamond.
Example Sentences:
(1) Guinea pig splenic lymphocytes and peritoneal macrophage cultures were incubated with quartz (DQ12), Corundum and aspirin as prostaglandin inhibitor.
(2) 3M discs and the rough corundum discs caused significantly more surface roughness of the Cosmic surface.
(3) The maximum values of tensile strength were measured when 200-250 microns corundum was used.
(4) Experiments carried out over a long period have shown that corundum ceramic is a strong material and is biologically inert.
(5) At desired time of incubation, the bacteria were washed with water, disintegrated with powdered corundum and in resulting cell-free extracts L-asparaginase activity was determined by the Conway method.
(6) Corundum produced no significant effect on the enzyme activity.
(7) The results showed that quartz induced a substantial increase of lipid peroxide in PAMs compared with both samples (dust-free or exposed to corundum).
(8) No adverse effects of corundum ceramics were noted.
(9) Corundum, which is sapphire, is number nine.” “The relative hardness of sapphire is 400, compared to quartz which is 100, so it is a lot harder than quartz,” Alford stressed.
(10) The results were compared with quartz dust as the known fibrogenic dust and emery dust (Corundum) was used as a control dust.
(11) Raman spectroscopy showed that both the socket and the beads are composed of alpha-Al2O3 (corundum), while the bioactive glass (alkaline and alkaline earth alumosilicate with a small quantity of zirconium oxide) showed this to have an intermediate structure between that of vitreous silica and that of the alkaline and alkaline earth disilicate glasses.
(12) All the lungs contained quartz and silicates and in most of the necropsy cases carborundum and corundum could also be shown.
(13) Quartz treatment did not alter esterase activity whereas corundum exposed cultures showed a decline.
(14) NH, a producer of glucoamylase, were cultivated in the presence of various supporting materials (three microspherical zeolitic particles, alpha-alumina and foam corundum).
(15) The results obtained showed that a significant inhibition of antibody formation to human albumin took place in animals with experimental silicosis in comparison with control rats that were given physiological saline or corundum as established by passive haemagglutination reaction according to Boyden as well as enhancement of the intensity of the delayed-type hypersensitivity to tuberculin.
(16) A complex of implanted dentures was manufactured with a corundum ceramic compound "Kador" made in the USSR.
(17) According to the present in vitro study it is possible to bond NPM alloy restorations with Panavia Ex several days after air brushing with corundum.
(18) Implants of corundum ceramic have been used in the treatment of 38 patients with bony tumours of the limbs.
(19) The patient's spine has been fixed by means of implant, made of corundum porous ceramic, metal plate and lavsan band.
(20) The values of the R(a) and Rmax were grown proportionally with the grain of corundum, but it was not resulted in the same increase of the tensile strength.