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Showing 1 to 20 of 52 for “"Sodium sulfate"”.
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Sodium sulfate corrosion of silicon carbide fiber-reinforced lithium aluminosilicate glass-ceramic matrix composites
Sodium sulfate hot corrosion of a SiC fiber-reinforced lithium aluminosilicate (LAS) glass-ceramic matrix composite was studied using Scanning Electron Microscope (SEM) and X-ray Diffraction (XRD). Changes in the microstructural chemical composition of the specimens were investigated. The samples …
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Phase equilibria and precipitation phenomena of sodium chloride and sodium sulfate in sub- and supercritical water
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1993.
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Factors Affecting Size and Swelling of Poly(ethylene glycol) Hydrogel Microspheres Formed in Aqueous Sodium Sulfate Solutions
… of poly(ethylene glycol): PEG) in aqueous sodium sulfate solutions was exploited to fabricate hydrogel microspheres under mild conditions without the use of other monomers, polymers, surfactants or organic solvents. Reactive PEG derivatives underwent thermally induced phase separation to …
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BIO/ORGANIC COMPOUND DETECTION USING SODIUM SULFATE MINERALS: IMPLICATIONS IN THE SEARCH FOR LIFE ON MARS AND EUROPA
With the discovery of Na-sulfate minerals (thenardite, mirabilite) on Mars and Europa, recent studies using these minerals have focused on their ability to assist in the detection of biosignatures. On Earth, biotic and biotic processes can assist in the formation and deposition of these minerals. A …
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BIO/ORGANIC COMPOUND DETECTION USING SODIUM SULFATE MINERALS: IMPLICATIONS IN THE SEARCH FOR LIFE ON MARS AND EUROPA
With the discovery of Na-sulfate minerals (thenardite, mirabilite) on Mars and Europa, recent studies using these minerals have focused on their ability to assist in the detection of biosignatures. On Earth, biotic and biotic processes can assist in the formation and deposition of these minerals. A …
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The Effects of Excess Dietary Sulfur Using Supplemental Sodium Sulfate on Beef Steer, Heifer, and Progeny Productive and Physiological Responses
… with an additional 0.25% S provided from sodium sulfate (Na2SO4; 0.58% total dietary S; HS) for a 114-d growing phase. Steers were moved to feedlot (373 ± 0.2 kg), remained on prior dietary S treatments, and fed corn and soybean meal diets (0.19 and 0.42% total dietary S; LS and HS …
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Measurements and modeling of deposition rates from near-supercritical, aqueous, sodium sulfate and potassium sulfate solutions to a heated cylinder
… The salts that are formed upon neutralization (sulfates, chlorides, phosphates, etc.) have low solubility in supercritical water (SCW) and consequently precipitate as solid phases. These salts can form agglomerates and coat internal surfaces, leading to plugging of transport lines and inhibition …
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An investigation of some of the factors affecting spray drying
… Preliminary tests were made with magnesium sulfate and sodium sulfate in order to get the dryer to function properly. Four tests were made, using sodium sulfate solutions, in order to determine the effect of the degree of atomization. Three tests were made, using sodium sulfate solutions, in …
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Effect of Sulfur Supplementation on in Vitro Cellulose Digestion and on Nutrient Utilization and Nitrogen Metabolism of Lambs Fed Various Forages
… with an isofulfurous quantity of either sodium sulfate or DL methionine.
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An Ecotoxicological Assessment of a Treated Coal-mining Effluent in the Leading Creek Watershed, Meigs County, Ohio
… and its toxicity could be attributed to sodium/sulfate-dominated TDS, which is significantly ameliorated by water hardness. Finally, although testing with lentic cladocerans, such as Ceriodaphnia, is consistent, cost-effective and sensitive to TDS related toxicity, the ecological …
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Lysozyme Separation from Tobacco Extract by Aqueous Two-Phase Extraction
… the concentration of phase forming salt, sodium chloride concentration, and pH on protein partitioning. The results showed that PEG/sodium sulfate system was most suitable for lysozyme purification. Detailed experiments were conducted by spiking lysozyme into the tobacco extract. The …
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Groundwater-lake interactions, Wood Lake, Benson County, North Dakota
… bicarbonate, and calcium-magnesium-sodium bicarbonate. In one isolated case, one water table piezometer produced a sodium sulfate water type, reflecting cation exchange of calcium for sodium from sodium-montmorillonitic clays, and sulfate derived from either the oxidation of iron …
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Investigating a Mitochondrial Fission Inhibitor as a Therapeutic for Inflammatory Bowel Diseases
… model of IBD, chemically induced by dextran sodium sulfate (DSS). Treatment with P110 was found to reduce macroscopic symptoms of colitis and provides evidence that aberrant mitochondrial dynamics contribute to IBD. The results provide motivation for further investigation into the specific …
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The Fate of Flame Volatized Sodium During the Combustion of Pulverized Coal in Reaction With Silica and Sulfur (Studied with the Aid of a Synthetic Coal)
<p>The interaction of flame volatilized sodium with sulfur and silica (quartz) was studied under coal fired boiler conditions in a laminar flow reactor. Measured compositions of sodium, sulfur and quartz were bound together in a synthetic coal matrix and subject to various temperature profiles …
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Organochlorine Pesticide Residue in Fish Fillets From Lake Springfield, Missouri
… (10 and 20 g) were ground with 20 g of anydrous sodium sulfate. This mixture was then extracted with 100 mL of hexane, filtered and passed through a Chem Elut cartridge (65% Diatomaceous Earth and 35% crystalline silica). The solution was collected after it has passed through the cartridge and an …
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Corrosion resistance of modified β-Eucryptite
… up to 100°C and environments containing sodium sulfate up to l000°C. The corrosion resistance was characterized by dilatometry, scanning electron microscopy, X-ray diffraction, energy dispersive x-ray analysis, weight variations, and mechanical properties variations. The results show that …
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Numerical modeling of chemical recovery from black liquor char
… a multiphase CFD code MFIX. Rate equations for sulfate reduction by carbon, gasification of carbon by CO2 and H2O, and, COS and H2S formation, are incorporated into MFIX, to simulate the chemical kinetics occurring in the char burning stage. Oxidation of carbon and Na 2S by O2 are also …
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Macromolecular Complexes of Cystic Fibrosis Transmembrane Conductance Regulator Alter Fluid Transport in inflammatory Bowel Disorders
… and iNOS activity attenuates diarrhea in dextran sodium sulfate (DSS) induced colitis. Dissolution of the macromolecular complex in Nherf2 -/- mice renders them resistant to CFTR-mediated secretory diarrhea in murine colitis models compared to Nherf2+/+. Our findings have important therapeutic …
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Electrochemical Measurement of Metal Ions in Water
… 9 and conductivity 300, 600, and 900 uS/cm with sodium sulfate electrolyte are measured. In pH 5 solution the magnitude of the Pb0 anodic stripping peak is lower compared to pH 7 and pH 9 for the same lead concentration. Pbx(OH)y(x-y)+ forms at pH 7 and 9 and adsorbs to the gold working electrode …
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Hydrogeology of the Shell Creek area, Mountrail County, North Dakota
… a few thousand feet wide, characterized by sulfate and bicarbonate waters, and a flow duration of a few years; (3) intermediate magnitude flow systems, a few miles wide, characterized by lignite and sand and gravel aquifers, which are the principal aquifers in the area, and by the high …
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