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Showing 1 to 20 of 34 for “"Alkaline Solution"”.
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Corrosion of steel reinforcement in concrete. Corrosion of mild steel bars in concrete and its effect on steel-concrete bond strength.
… of mild steel in different environments (saline, alkaline solutions and concrete media) using potentiodynamic polarization technique. The study also included the effect of corrosion on bond strength between reinforcing steel and concrete using pull-out test. Corrosion of mild steel and 316L …
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Characterization of nanostructures ZnO synthesized through hydrothermal method
… crystallinity of ZnO nanostructures are types of alkaline solution, the alkaline pH value used and the application hours of the hydrothermal process. This research focuses on the fabricated ZnO nanostructures via hydrothermal synthesis and the effects of alkaline solution on the morphology of ZnO …
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Highly Ordered Hexagonal Mesoporous Silica as Hosts and Templates for Encapsulation of Germanium Semiconductor Clusters
… several morphologies have been synthesized in an alkaline solution using cationic amphiphilic surfactant CTAB as template. The size and the morphology were controlled by varying the reaction temperature and time or by controlling the crystallization process of silica. The characterization results …
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Surface structural changes of perovskite oxides during oxygen evolution in alkaline electrolyte
… for the oxygen evolution reaction (OER) in alkaline solution reported to date. In this work it is shown via high resolution transmission electron microscopy (HRTEM) and Raman spectroscopy that oxides such as BSCF82 rapidly undergoes amorphization at its surface under OER conditions, which …
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Alkaline durability tests for E-glass/vinyl ester-reinforced polymer with nanoclay
… 10A nanoclay. These samples were aged in an alkaline solution (pH = 13.2) with 3560N (800-lbs), 2225N (500-lbs) and 885N (200-lbs) of sustained load, which were 50%, 31% and 12.5% of the tensile strength, respectively. Time to failure or tensile strength reduction was measured and used to …
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Electrodeposition and characterization of metals and metal oxides for energy conversion and storage
… reducing tris(ethylenediamine)cobalt(III) in alkaline solution. Paper II presents a scheme to convert the ß-Co(OH)<sub>2</sub> to CoOOH and Co<sub>3</sub>O<sub>4</sub> and compares their catalytic activity for the oxygen evolution reaction. Co<sub>3</sub>O<sub>4</sub> appears to be a more …
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Bioanalytical applications of microfluidic devices
… polymorphisms (SNPs). SNP discrimination using alkaline dehybridization has long been neglected because the pH range in which thermodynamic discrimination can be done is quite narrow. We found, however, that SNPs can be discriminated by the kinetic differences exhibited in the dehybridization of …
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Surface and interphase studies of the adhesion of a siloxane- modified-polyimide coating on metals
… surface can be modified by pretreatment in an alkaline solution. This surface pretreatment etched away the top siloxane surface layer, activated the surface by exposing and creating polar functional groups, particularly carboxylic acid groups, and roughened the surface. These changes on the …
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Zinc alloy powders for alkaline batteries
<p>"Zinc (Zn) powders form the anode of a modern alkaline battery. During discharge of the battery, zinc oxidizes to produce zinc oxide and electrons. Alkaline batteries are prone to leakage during storage. This phenomenon is caused by zinc dissolving into the alkaline solution and producing …
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3D printing of polyblend calcium carbonate (grout) using binder jetting technology
… thickness, binder saturation levels, curing solutions and curing time on the 3D printed tiles. The deviation from nominal, the breaking strength, and surface roughness were measured and considered in determining the process parameters. The statistical analysis of the results indicated that …
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Composite materials made of chitosan and nanosized apatite : preparation and physicochemical characterization
… occurs as hydrogel as suspended in aqueous alkaline solution. In order to get solid composites various drying procedures including freeze-drying technique, air-drying at room temperature and at moderate temperatures, between 50oC and 100oC were used. Physicochemical studies showed that the …
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Methodological and biological studies of the amino acid oxidases.
… by the increase in fluorescence due to NAD[+] in alkaline solution (excitation maximum 365 nm, emission maximum 455 nm). The former provided the basis for a kinetic spectrophotometric assay which was sensitive and precise and lent itself to valid kinetic studies of the enzymes. The fluorescence …
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An Experimental and Numerical Study on Metakaolin-based Geopolymers
… powder such as metakaolin (MK) with an alkaline solution. Several parameters such as composition and curing conditions influence the characteristics of GPs, and appropriate selection of material proportions is necessary to achieve the desired performance. This research aims to (i) model …
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Comparison of Extraction Techniques for Δ-9-Tetrahydrocannabinol from Urine
… procedures. In past research, either a strong alkaline solution or β-glucuronidase has been used to cleave the bond between the Δ-9-THC and glucuronic acid before an alkaline extraction. Δ-9-THC has a pKa of 10.6 and therefore is always extracted at an alkaline pH. In this study, both a strong …
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Bioremediation of chlorinated ethanes and ethenes in vertical flow engineered wetland systems
… wetland system to near neutral pH by applying alkaline solution was observed to be necessary for biodegradation to occur. The potential for plant assisted remediation of 1,1-DCA through the root system of Scirpus americanus indicated possible plant uptake and enhanced system performance. …
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Several new methods for the development of latent and blood fingerprints
… of latent fingerprints was also investigated. Solution trials proved that the reaction products of 2,3-naphthalenedicarboxaldehyde (NDA) and 2,3- anthracenedicarboxaldehyde (ADA) with analine produce favourable “red-shifts” in emission wavelengths which would make them stand out from the blue …
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Performance of a multiple stage hot water pretreatment on sugarcane bagasse and its economic analysis
… biomass was deacetylated by soaking in a mild alkaline solution prior to pretreatment with hot water and by fermenting with a mixture of two commercial Saccharomyces yeast strains. The original glucose-xylose cofermenting yeast strain was combined with a standard glucose-fermenting strain. The …
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