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 97 for “"SEM-EDX"”.
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Development and Implementation of an Automated SEM-EDX Routine for Characterizing Respirable Coal Mine Dust
… microscopy with energy dispersive x-ray (SEM-EDX). SEM-EDX is a powerful tool that allows determination of the size, shape, and chemistry of individual particles, but manual operation of the instrument is very time consuming and has the potential to introduce user bias. The automated …
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Development and Demonstration of a Standard Methodology for Respirable Coal Mine Dust Characterization Using SEM-EDX
… microscopy with energy dispersive x-ray (SEM-EDX). In addition to a thorough description of the developed particle level characterization approach, the method is demonstrated with underground respirable dust samples collected from an underground coal mine in Central Appalachia. Results of …
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An Improved Thermogravimetric Analysis Method for Respirable Coal Mine Dust and Comparison to Results by SEM-EDX
… microscopy using energy dispersive X-ray (SEM-EDX). TGA and SEM-EDX results are compared to gain insights regarding the analytical methods and general trends in dust composition within and between mines.
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Investigating the Effects of Particle Loading and Agglomeration on Respirable Coal Mine Dust Particle Classification by SEM-EDX
… with energy dispersive X-ray spectroscopy (SEM-EDX) is a powerful tool that can analyze RCMD on a particle-level. The images produced by the SEM can size and characterize morphology of micron and submicron-sized particles. In addition, the EDX can determine elemental content, which can be …
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Chemical Differentiation of Human Osseous, Non-human Osseous, and Non-osseous Materials Using Scanning Electron Microscopy - Energy Dispersive X-ray Spectrometry (SEM/EDX) and Multivariate Statistical Analysis
… Ubelaker and colleagues (2002) proposed using SEM/EDX to achieve this distinction and Christensen and colleagues (2012) have validated X-ray Fluorescence Spectrometry (XRF) for this application. An alternative method of analysis involves performing principal component analysis (PCA) on element …
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A Multi-instrument Investigation of Pigments, Binders and Varnishes from Egyptian Paintings (AD 1300-1900): Molecular and Elemental Analysis Using Raman, GC-MS and SEM-EDX Techniques
The focus of this study was analytical investigations of Egyptian paintings, mainly Coptic icons and Islamic wooden ceilings, dating from 1300-1900 using multiinstrumental techniques. Twenty three Coptic icons and three wooden ceilings dated from different periods and painted by different painters …
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Green approach to treat institutional wastewater by using cassava peels starch (CPS) as coagulant aid
… Characteristics of CPS were characterized by SEM-EDX, FTIR, XRF, XRD, particle size and zeta potential. Removal efficiency of dual coagulant (alum+CPS) were achieved at optimum dosage of 40:60 mg/L at pH 8 with 60 mins settling time with removal efficiency of COD (41%), TSS (86%) and Turbidity …
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Lead-Free Gunshot Residues as Forensic Evidence
… Microscopy Energy-Dispersive X-ray Spectroscopy (SEM-EDX) as means of characterizing simulations of lead-free primers and GSR originating from the discharge of lead-free blank training rounds, typically used by law enforcement. As a result, forensic investigators will be provided with: a chemical …
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Demonstration of Direct-on-filter FTIR to Estimate Silica, Kaolinite, and Calcite Mineral Fraction in Respirable Coal Mine Dust Samples
… microscopy with energy dispersive X-ray (SEM-EDX). Results indicate the usefulness of the DOF FTIR method, and comparison suggests the presence of significant non-carbonate minerals other than silica and kaolinite in the coal mine dust. The results also show that SEM-EDX frequently …
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Development of Carbon-Based, Controlled-Release Soil Ameliorants Through Chemical Pathways
… using elemental analysis, FTIR, TGA/DTG, BET, SEM-EDX, and XPS. Switchgrass chars exhibited the highest porosity (423.97 m2/g) and surface oxygenation (COOH up to 13.51%), promoting nutrient loading but associated with lower thermal stability. Coconut chars, with high aromaticity (C-C/C=C …
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Sequestration of carbon dioxide (CO2) using bio-foamed concrete brick incorporating bacillus tequilensis bacteria
… in the form of CaCO3 were analysed by SEM, EDX and XRD. Microstructure analysis confirmed the improvement of the compressive strength and physical properties of B-FCB compared to FCB, which was analysed via SEM, EDX and XRD.
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Exploration of Respirable Dust Particles Sourced From Rock Strata in an Underground Coal Mine
… microscopy with energy dispersive X-ray (SEM-EDX) to determine particle size and mineralogy distributions. Where comparable, results were generally consistent with those from other central Appalachian mines. However, the unique production sampling scheme offered new insights regarding the …
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Formation, modification and new applications of orderly structured titanium oxide nanostructures /
… in a liquid medium were investigated using SEM, EDX, Raman, EPR, XPS, XRD methods. In this dissertation, it was first time determined that hydrothermal synthesis and subsequent calcination under oxygen-free atmosphere allow the formation of high surface area titanium suboxide nanostructures …
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Study on the surface chemistry behavior of pyrochlore during froth flotation
… scheme at the Niobec plant, Quebec, Canada. The SEM-EDX analysis revealed that pyrochlore from the Niobec deposit occurs as high and low iron varieties, and that recovery favours varieties with a lower Fe content. To understand a potential relationship between pyrochlore matrix composition and …
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A study of antimicrobial properties of fabric treated with silane and N-halamine complex
… at the surface of the fabric are evaluated using SEM- EDX and peak of NCO was determined using FTIR analysis. The fabrics were tested for antimicrobial properties using ATCC 2695 gram positive bacteria <em>Staphylococcus aureus</em> and ATCC 8739 gram negative bacteria <em>Escherichia col</em>i. …
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Synthesis study of size-controlled noble metal nanoparticle systems of Re, Ir, and Os using AOT-reverse microemulsion based methodologies
… including UV-Vis spectroscopy, ESI-MS, FE-SEM/EDX, and HR-TEM, were employed to thoroughly analyse the synthesized NPs. UV-Vis confirmed the successful reduction of the metal precursors, while FE-SEM/EDX provided valuable information on surface morphology and elemental composition. HR-TEM …
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Synthesis and Characterization of Methylammonium Strontium Bromide Hybrid Perovskite
… thin film were further confirmed using XRD and SEM-EDX. We explored the stability of the MASrBr3 thin films in three solvents and the electrochemical stability of MASrBr3 in an ionic liquid, 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide. From this study, we observed that MASrBr3 …
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Reactive magnetron deposition and characterization of ZrN thin films for decorative and field emission applications
… well as temperature, and were characterized by SEM/EDX, AFM, Colour photospectrometer, RBS and resonant RBS. The films were found to be transparent and semiconducting. They tended to absorb oxygen. The films were found to adhere well to the substrates. The colours of the films varied depending …
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Polarized Light Microscopy and Image Processing as a Near Real-time Monitoring Tool for Coal Mine Dust Monitoring
… This approach eliminated the need for post hoc SEM-EDX analysis by assigning particle identities based on deposition order. Classification models were constructed by establishing grayscale intensity thresholds under plane- and cross-polarized lighting conditions. The results demonstrated the …
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Phosphate stabilization by non-chromate post-rinse treatment
… advanced surface analysis techniques such as SEM/EDX, AES, SIMS, and XRD and polarization measurements.
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