Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 126 for “"deionized water"”.
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Hydrocyclone fractionation of chickpea flour and measurement of physical and functional properties of flour and starch and protein fractions
… in two different media, isopropyl alcohol or deionized water. In both media, high inlet pressure resulted in smaller geometric mean diameter of particles collected in the overflow and underflow. Isopropyl alcohol as a medium resulted in particles with smaller geometric mean diameter than did …
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Investigation of tritium atom exchange in plastic liquid scintillation vials
… is an analyte of interest in many air, soil, and water samples. It has been shown that long term storage and study of tritium samples results in a reduction in tritium activity not attributed to the natural radioactive decay. Several explanations have been offered through past literatures …
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A STUDY OF THE METAL-BINDING ORGANIC CONSTITUENTS IN GREAT BAY SEDIMENTARY SYSTEMS
… of Great Bay estuary in New Hampshire. Pore water, a double-deionized water extract, and an artificial seawater extract were used to isolate organic matter from the sediments. Dissolved organic carbon measurements revealed that the seawater and deionized water extractants removed considerably …
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Self-healing properties of water filtration membranes containing amphiphilic comb polymer
… acid (Chromerge)) and/or annealed (in 90⁰C deionized water), and their elemental surface composition and specific carbon binding environments are determined by XPS. Filtration experiments are done by alternating feed solutions of deionized water and a foulant (either bovine serum albumin or …
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Evaluation of Nanobubble Water Irrigation For Removing Biofilm-Mimicking Hydrogel in Premolars With Type II Canal Systems
… study was to evaluate the efficacy of nanobubble water (NBW) irrigation for removal of a biofilm-mimicking hydrogel from premolars with Vertucci Type II canal systems and to compare its performance across different irrigant activation techniques. Materials and Methods: Extracted human premolars (n …
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Development and Use of Moisture-Suction Relationships for Geosynthetic Clay Liners
… tests, and relative humidity tests, then fitting water retention curves (WRCs) to the data. WRCs were determined for wetting processes and drying processes in terms of gravimetric moisture content and volumetric moisture content.</p> <p>The effects of GCL type, hydration solution, wet-dry cycles, …
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Defluoridation of Water Using Silica Based Aluminum Coated Adsorbents
Fluoride contamination in drinking water poses serious global health concerns, including fluorosis, cancer, and organ damage. To address this, the present study developed and evaluated aluminum-coated silica-based adsorbents for effective and sustainable fluoride removal. Silica sand and …
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Feasibility of using power steering pumps in small-scale solar thermal electric power systems
… regime. The test station was designed to pump deionized water; it was intended that measurements and calculations would then be non-dimensionalized and used to predict the ORC working fluid's properties. Unfortunately, deionized water caused the power steering pump shafts to seize; the …
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Multiphase flows in polymer microfluidic systems
… For gas-liquid two-phase flow, dry air and deionized water were driven into hot embossed PMMA microchannels with 200 μm square test microchannels. Flow regimes, flow maps and the lengths of the gas bubbles and liquid plugs in terms of the liquid volumetric flow ratio (βL) were determined. …
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Root cause analysis of solder flux residue incidence in the manufacture of electronic power modules
… the manufacture of power modules. The existing deionized water-based centrifugal cleaning process was analyzed and hypotheses for root causes of the problem were proposed. The experimentation included cleaning tests using agitation and soak cycles. Parameters such as chemical agent, time and …
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The dissolution rates of amorphous silica and opal-CT
… and a natural opal (opal-CT) in distilled and deionized water and two concentrations of NaCI solution from 25°C to 75°C were measured by molybdate blue method and determined by initial rate method. The specific surface area of the samples were determined by N2 BET procedure. XRD patterns were …
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INVESTIGATION OF CARBON DOTS BEHAVIOR: DIFFUSIOPHORESIS AND INFLUENCE ON THE OIL-WATER INTERFACES
… behavior of CDs was observed in both deionized water (DI) and seawater (SW), where CDs can move with or against solvent gradients. Additionally, CDs’ ability in altering surface wettability and interfacial tension (IFT) with notable jamming at high concentrations was recorded, …
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An in vitro study on the effect of organic derived nano hydroxyapatite on dentine permeability
… exposed to four groups of treatment including deionized water, Sensodyne Sensitivity and Gum toothpaste, Colgate toothpaste and organic derived nanohydroxyapatite derived from eggshells.
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Laboratory Investigations Into the Fate of Aromatic Pollutants in Natural Waters
… cloud droplets and aerosols, often contain both water and organic matter (OM). Reactivity can differ significantly between aqueous and organic phases. We have measured photolysis kinetics of the polycyclic aromatic hydrocarbons (PAHs) anthracene and pyrene in several organic solvents and in …
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UNDERWATER BONDING WITH POLYMER MIMICS OF MUSSEL ADHESIVE PROTEINS
When it comes to underwater adhesion, shellfish are the true experts. Mussels, barnacles, and oysters attach to rocks with apparent ease. Yet our man-made glues often fail miserably when trying to stick in wet environments. Results described herein focus on poly[(3,4-dihydroxystyrene)-co-styrene], …
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The amino acid and monosaccharide content of the cell walls of Thiobacillus thiooxidans
… cell rupture, coupled with either washing with deionized water or washing treatment with IR-120 and AG-1X2 ion exchange resins, were tested"--Abstract, page ii-iii.
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The development of a novel and potentially nondestructive pretreatment for the radiocarbon dating of archaeological artifacts
… with NaOH, phosphate buffer (pH 8), and deionized water were characterized using THM-GC-MS. Preliminary results show that both NaOH and phosphate buffer are at least equally effective. The phosphate treatment was also used on two archaeological artifacts that were prepared …
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Drain Diverter
The DI water is commonly used to rinse production wafers to remove mechanical and chemical residue without any problematic chemical reaction in rinse process. The semiconductor industry wants to save their manufacture cost and reduce the industrial residue by recycling the deionized water during …
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Thermal conductivity of fluids containing suspension of nanometer-sized particles
… enhancement observed for ethylene glycol than deionized water base fluids. However, most of the enhancement observed can be explained based on classical Maxwell-Garnett effective medium theory. Although ethylene glycol containing gold nanoparticles produces significantly higher enhancement in …
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GERMINACIÓN, VIGOR, VIABILIDAD, CALIDAD Y MEJORA DE SEMILLAS DE CEBOLLA (ALLIUM CEPA L.)
… essay, seeds were immersed in a circulating water flow from 30 minutes to 24 h. Best results were obtained with the 4 h hydration. Prehydration influences micro-organisms contamination percentage of non-germinated seeds. Furthermore, prehydration was combined to a disinfection using sodium …
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