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 63 for “"ESEM"”.
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Transmission-mode imaging in the environmental scanning electron microscope (ESEM)
… quantity of gas into the sample chamber, termed ESEM. The most recent evolution in this line was the combination of ESEM and STEM in 2005, a procedure termed Wet STEM. The focus of this work is on investigating applications of this new technique, along with the contrast mechanisms involved in …
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Scanning Methods as Monitoring, Verification, and Accounting tools for CO₂ Sequestration in Unconventional Gas Reservoirs
… both environmental scanning electron microscope (ESEM) and micro CT demonstrate that distributions of cleat porosity in coals are anisotropic and not correlated to the seam depth or location. ESEM is used with micro CT scanning to verify the results before and after the impregnation of the …
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Examining the Factor Structure of the Substance Use Risk Profile Scale (SURPS) in Emerging Adults: An Exploratory Structural Equation Modelling Approach
… if exploratory structural equation modelling (ESEM) better captured the optimal SURPS factor structure in a large Canadian sample, tested measurement invariance across sex and alcohol use differences, and assessed the predictive validity of SURPS subscales for alcohol use motives and problems. …
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In operando SEM for the accelerated exploration of nanomaterials and their scalable device integration
… an environmental scanning electron microscope (ESEM) that is suitable for operando imaging of nanoscale dynamics at high temperatures and pressures of reactive gases is outlined. Key to the microscope's operation is a gas injection nozzle that allows high gas pressures to be locally generated at …
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Morphology Tuning and Mechanical Properties of Nanoporous Gold
… an environmental scanning electron microscope (ESEM). A specially designed tensile stage and sample holders are used to deform the sample inside the ESEM, allowing us to observing both the macro and microscopic structure changes. Our experimental results advance our understandings of how porous …
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Thermophysical Properties and Microstructural Changes of Composite Materials at Elevated Temperature
… An environmental scanning electron microscope (ESEM) was used in conjunction with a heating platform to record real-time video of microstructural changes of materials during decomposition and cooling following decomposition. A gas infusion technique was devised to measure porosity, in which …
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Membrane Processing of Ethanol -Extracted Corn Oil
… scanning microscopy with field-emission gun (ESEM-FEG) and matrix-assisted laser desorption ionization (MALDI) mass spectroscopy. Economics of the dry grind process with the new membrane processes for oil recovery were shown to add considerable value.
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Exploring the application of instrumental analysis for the conservation of textiles excavated in Greece
… coupled with energy dispersive spectroscopy (ESEM-EDS), FTIR and Raman<br/>microspectroscopy, and XRF spectroscopy, with the aim of material characterisation and<br/>identification. A survey through the Archives of the Hellenic Ministry of Culture revealed 65<br/>different cases where textiles …
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Solubility enhancement of poorly water soluble drugs using liposome technology
… Environmental scanning-electron microscopy (ESEM) was used to dynamically follow the changes in liposome morphology in real time during dehydration thereby providing a alternative assay of liposome formulation and stability. The ESEM analysis clearly demonstrated ibuprofen incorporation …
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Identification of quantitative second-harmonic generation imaging metrics for collagenous tissue
… from environmental-scanning electron microscopy (ESEM). In this case, the 2D metrics employed to analyze the structural alteration of tissues were obtained by measuring the SHG signal intensity and the intensity distribution in the spatial-frequency domain. SHG images obtained before and after …
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Test Development and Material Characterization of Hot Poured Crack Sealant at Low Temperature
… environmental scanning electron microscopy (ESEM), gel-permeation chromatography (GPC), Fourier-transform infrared spectroscopy (FTIR), and thermo-gravimetric analysis (TGA). These techniques reveal the composition of sealant as well as the interaction between the components and are used to …
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Effect of carbon based nanoadditives on external gear pump performance
… environmental scanning electron microscope (ESEM) images of the additives were obtained before and after extended run periods within the pump. The results indicate that graphite and CNTs retained significant resilience, i.e. no breakage and deformation was observed. However, the very long …
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Effect of intermediate solvents on poly(ether ether ketone)
… the environmental scanning electron microscope (ESEM)), which were first verified with another semi-crystalline thermoplastic polymer, isotactic polypropylene. PEEK specimens were stressed in the inside of glass cones and immersed in a series of solvents. Differences among solvent uptakes of …
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COGNITIVE MODELING FOR HUMAN FACTORS TESTING: DEVELOPING A STRUCTURED TASK ANALYSIS FRAMEWORK FOR DESIGNERS
… subjects using exploratory structural modeling (ESEM) to ensure the model was designer accessible and that it aligned with its theoretical underpinnings. ESEM factor loadings demonstrated theoretical coherence, supporting the validity of the standardized structure. The outcome of this research is …
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Nutrient profile, functional properties, and microstructure of dried waste milk products for use as a potential animal feed
… environmental scanning electron microscopy (ESEM). The objectives to this study were to: 1) further concentrate and dry RMP into a powder to reduce hauling cost, improve consistency, and increase the storage life of the product; 2) add other by-products to the RMP to improve the nutrient …
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Characterisation of the cross-linking and calcification associated with glutaraldehyde-treated cardic bioprostheses.
… environmental scanning electron microscopy (ESEM). This is thought to be an important step in the analysis of tissues in their native state. Investigation of the calcification process with samples from clinical investigations (explanted human calcified valves), in-vivo screening (rat …
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Heat transfer through a condensate droplet on hydrophobic and nanostructured superhydrophobic surfaces
… condensed water droplet growth using optical and ESEM microscopy on bi-philic samples consisting of hydrophobic and nanostructured superhydrophobic regions, showing excellent agreement with the simulations for both constant base area and constant contact angle growth regimes. Our results …
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Biotribology: articular cartilage friction, wear, and lubrication
… load, and LVDT displacement; photomacrographs; ESEM and SEM surface studies; stained cross-sectional slides of cartilage; and hydroxyproline analysis of cartilage wear. Detailed procedures and discussion of results are presented along with recommended changes for future biotribology research.
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Tribopolymerization: ceramic lubrication under high loads and high speeds
… not decrease wear; in some cases wear increased. ESEM surface studies show a relationship between the anti-wear effectiveness and the consistency of a formed wear debris layer on the alumina surface. The surface films of wear debris and the formed polymeric products may reduce wear by providing …
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Effect of zinc substitution on the structure of calcium Fluoro-Alumino-Silicate glasses and glass-ceramics
… by Helium Pycnometer, DSC, TGA, FTIR, Raman, ESEM and EDX. The density of the resulting glass ceramics was measured also by Helium pycnometer and X-ray diffraction was conducted to identify the crystal phases formed. The density of zinc substituted glasses and glass-ceramics increased with …
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