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27 results for “Dissolution”
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Research ArticleOpen accessEvery word in the titleGetting an Alternative Pitch Binder by Thermal Dissolution of CoalPeter Nikolayevich Kuznetsov, Elena Nikolaevna Marakushina, Anastasia Valerievna Kazbanova et al.The process of thermal dissolution of medium metamorphosed coals in anthracene oil to produce an alternative pitch binder was studied. The process was carried out at temperatures from 350 to 400°C and pressure not higher than 2.5 MPa, without the use of hydrogen and catalysts. It was determined that during thermal dissolution hard coal of gaseous-fat grade demonstrated a higher … …American Journal of Applied Sciences, Vol. 13, Issue 1 · 4 Jan 2016 · 8,138 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleDissolution Sintering Technique to Create Porous Copper with Sodium Chloride Using Polyvinyl Alcohol Solution through Powder MetallurgyCynthia Waters, Stephen Ajinola, Mustafa SalihThe main purpose of this paper was to investigate the relative densities, porosities, compression strength and energy absorbed by porous copper (Cu) formed via the dissolution sintering technique using Polyvinyl Alcohol (PVA) solution as a binder with Sodium Chloride (NaCl) as space holder. Porous Cu was fabricated through powder metallurgy route using dissolution sintering technique by mixing Cu with NaCl … …American Journal of Engineering and Applied Sciences, Vol. 9, Issue 1 · 13 Mar 2016 · 8,985 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleThe Dissolution of the National Partnership for Excellence and Accountability in TeachingFrank B. MurrayProblem statement: A heralded federal imitative known as The National Partnership of Excellence in Education (NPEAT), dissolved shortly after being formed. An analysis of some causes of the unexpected dissolution of NPEAT focuses on six causes (1) compromises in the initial competition for the partnership, (2) the funding mechanism as grant or contract, (3) the behavioral trap of sunk costs, … …Journal of Social Sciences, Vol. 6, Issue 1 · 31 Mar 2010 · 8,032 accessesView PDFCite
Research ArticleOpen accessIn the keywordsGeochemistry of Siloam and Tshipise Geothermal Springs, Limpopo Province, South AfricaOlatunde Samod Durowoju, John Ogony Odiyo, Georges-Ivo Ekosse EkosseGeothermal springs are natural geological phenomena that occur throughout the world, and South Africa (SA) is endowed with several springs of this nature. Most of the geothermal springs in SA (31%) are found in Limpopo Province. Assessment of geochemistry of Siloam and Tshipise geothermal springs were undertaken during 2014 winter (May – July) and summer (October – December) seasons. Water … …American Journal of Environmental Sciences, Vol. 14, Issue 2 · 30 Mar 2018 · 8,533 accessesView PDFCite
Research ArticleOpen accessIn the keywordsQuality evaluation of Ketoprofen Solid Dosage Forms Available in the Pharma-Market of BangladeshKamrun Naher, Gazi Md. Monjur Murshid, Md. Golam Hossain et al.Problem statement: Ketoprofen, a widely used analgesic and anti-inflammatory drug, was available in two types of solid dosage forms in the pharma-market of Bangladesh: enteric-coated tablet and capsule of sustained-release pattern. Seven brands of ketoprofen enteric-coated tablets and four brands of ketoprofen sustained release capsules were studied for their in-vitro release behavior as well as potency status. Approach: The studies … …American Journal of Applied Sciences, Vol. 7, Issue 10 · 31 Oct 2010 · 8,048 accessesView PDFCite
Research ArticleOpen accessIn the keywordsEffects of the Mass Transfer Process in Oil SpillFabián Betancourt, Arturo Palacio, Alejandro RodriguezA revision of the models used to study the behavior of the mass loss processes associated with petroleum spills on water and to compare those models with experimental data. The processes of mass transfer studied in this work are evaporating, dissolution, vertical dispersion, emulsification and the changes of properties associated with these. The comparison of the estimations with the field … …American Journal of Applied Sciences, Vol. 2, Issue 5 · 31 May 2005 · 7,502 accessesView PDFCite
Research ArticleOpen accessIn the abstractFiber Laser Beam Welding Between Niobium and TitaniumRafael Humberto de Mota Siqueira, Isabela Atilio, Caroline Cristine de Andrade Ferreira et al.Niobium and titanium are difficult to weld because of many factors, such as their tendency to oxidize and burn and the relatively high melting temperatures. Here, fiber laser beam welding has been proposed to weld Nb and Ti sheets in overlap geometry. In the current research, one millimeter thick CP-Ti was placed at the top and a 3 mm pure … …Journal of Aircraft and Spacecraft Technology, Vol. 4, Issue 1 · 9 Mar 2020 · 7,715 accessesView PDFCite
Research ArticleOpen accessIn the abstractHardening Effects of In-Situ Aging for a Laser Welded Maraging SteelMilton Sergio Fernandes de Lima, Rafael Humberto de Mota Siqueira, Sheila Medeiros de Carvalho, Antonio Jorge AbdallaMaraging steels are ultra-high strength alloys which have been successfully laser welded to obtain structural components. For most of the applications these steels are in an aged state to attain tensile strength up to 1.5 GPa, although welding induces local softening due to dissolution of precipitates. This paper aims to investigate the effect of in-situ aging of the maraging steel … …Journal of Aircraft and Spacecraft Technology, Vol. 3, Issue 1 · 12 Nov 2019 · 7,210 accessesView PDFCite
Research ArticleOpen accessIn the abstractInfluence of Bitumen Addition on Sabkha Soil Shear Strength Characteristics under Dry and Soaked ConditionsFahad A. Alotaibi, Humoud Melfi AldaihaniHigh salt content in sabkha soils means they are significantly affected by changes in water content. Dissolution of salts within sabkha soil mass decreases their shear strength upon inundation with water, resulting from the destruction of cementation bonds between soil particles. Therefore, successful improvement for these soils must be based on reducing the dissolution of sabkha salts to minimize their … …American Journal of Engineering and Applied Sciences, Vol. 11, Issue 4 · 13 Nov 2018 · 7,388 accessesView PDFCite
Research ArticleOpen accessIn the abstractThermodynamic Model of Calcium Carbonate System of Soil SolutionAbdulmalik A. Batukaev, Anatoliy P. Endovitsky, Andrey G. Andreev et al.Carbonate system determines the basic processes of soil formation and evolution. The aim of research was to show the importance of chemical Carbonate Calcium Equilibrium (CCE) in soil solutions. CCE causes a degree of soil solution’s saturation with CaCO3 as a factor of carbonate geochemical cycle. CCE depends on chemical composition, pH, Eh, buffering properties of liquid phase, dissolution, migration, … …American Journal of Agricultural and Biological Sciences, Vol. 11, Issue 2 · 18 May 2016 · 7,978 accessesView PDFCite