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Showing 1 to 15 of 15 for “"Barium sulfate"”.
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A Potentiometric Method for the Determination of Sulfate
The precipitation of barium sulfate is the basis of many sulfate analyses. The literature cites many direct volumetric methods using diphenyl benzidine as indicator. Other methods make use of ethylene diamine tetracetic acid sodium salt for direct precipitation titrations.
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Anti wetting additives for aluminosilicate refractories in molten aluminum contact applications
… to understand the corrosion process.</p> <p>Barium sulfate, which is widely used as an anti-wetting additive to improve refractory performance by limiting physical contact between molten metal and the refractory, has proved ineffective at temperatures above 1000⁰C. A literature review …
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Modeling and experimental validation of a single-feed semi-batch precipitation process
… single-feed semi-batch precipitation process of barium sulfate in a stirred tank was experimentally studied and numerically predicted using a micromixing model based on CFD. A commercial CFD package (FLUENT) was used to simulate the flow field and predict the energy dissipation rate distributions …
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Determination of radium-226 in drinking water by alpha spectroscopy
… concentrating radium by coprecipitation with barium sulfate; separating radium from barium and other alkaline earth metals by ion exchange; and electrodepositing radium onto stainless steel disc for radioactivity counting. The procedure requires the using a chemical yield tracer, Ra-223. Two …
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Quantitative Photoacoustic Reaction-Rate Measurements Under Microcomputer Control
… size distributions of samarium oxide and barium sulfate.
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Toughening mechanisms in composites of miscible polymer blends with rigid filler particles
… The blend 90% PVC / 10% DOP was mixed with barium sulfate filler and evaluated for toughness in slow tension. In general, the composites showed decreasing toughness with increasing filler content. However, several specimens at 5 vol% filler exhibited a large increase in ductility and …
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Barium carbonate treatment of sulfuric acid wastewater
Two methods of removing sulfates from sulfuric acid wastewater through the addition of barium carbonate and the formation of a barium sulfate precipitant were investigated. Optimization of barium carbonate dosage, reaction time and mixing conditions was accomplished for each method prior to …
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Response to parameter variation of a one-inch diameter hydrocyclone for pyritic sulfur removal
… synthetic material, made from casting resin and barium sulfate, duplicated the coal with respect to particle size, shape, and specific gravity distribution. The synthetic coal had the advantage of not degrading during the course of the experiment. Three coals were simulated for the purposes of …
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Development of Anti-corrosive Polyester Powder Coatings
… combined effects of the additives with a filler barium sulfate were also investigated. The effect of the film thickness was studied and optimized by the statistical method Mixture Design. The additives and functional filler significantly improved the anti-corrosive performance of the coatings, …
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Die Gefäßarchitektur der Bauchwand und ihre Stellung in der Plastischen Chirurgie : eine anatomische Untersuchung
… above the inguinal ligament. A mixture of barium-sulfate, lead-mennige and pulverised gelatine is then injected. All the abdominal walls are dissected en bloc. Afterwards some specimens are partially dissected in longitudinal stripes. Finally x-rays, both in standard and mammography …
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Sulfur forms in crude viscose rayon
… with sodium hydroxide solution, oxidation to sulfates with bromine, and precipitation as barium sulfate. This method is accurate to one percent. A more rapid method for the analysis of total sulfur consists of boiling the rayon in a dilute solution of sodium sulfite followed by titration of …
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Implantable Bioelectronics with Integrated Shape Actuation for Minimally Invasive Neural Interfacing
… on human cadaveric models that Bismuth and Barium sulfate-mixed silicone markers mixed at 2:1 and 1:1 ratios respectively are visible under X-ray fluoroscopy and that the composites are biocompatible. Therefore, this work provides a tool that enables imaging of thin-film bioelectronics …
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Microangiographic comparison of the effects of the three-loop pulley and six strand Savage tenorrhaphy techniques on the equine superficial digital flexor tendon
… euthanatized, and forelimbs perfused with barium sulfate solution then fixed with formalin under tension. The tendons were transected every 5mm and microangiographic images were obtained using a Faxitron X-ray cabinet with computed radiography imaging. Microvascular analysis of sections …
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Improving Bioactivity and the Anti-Bacterial Properties of Two-Solution Bone Cement Containing Cross-Linked Polymethylmethacrylate (PMMA) Nanospheres (η-TSBC)
… bone. Also, addition of radiopacifiers such as barium sulfate and zirconium dioxide is required for fluoroscopy guided procedures and is known to be detrimental to the cement mechanical and bioactive properties. In this sense, η-TSBCs containing strontium-substituted hydroxyapatite (SrHA) …