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 31 for “"Environmental Scanning Electron Microscopy"”.
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Test Development and Material Characterization of Hot Poured Crack Sealant at Low Temperature
… were also investigated by confocal laser scanning microscopy (CLSM), 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 …
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A nanomechanical investigation of the crack tip process zone of marble
… assess the macrostructure and crack formation, environmental scanning electron microscopy (ESEM), to visually assess microstructure, and nanoindentation, to yield nanomechanical properties and assess nano/microheterogeneities. Nanoindentation testing was comprised of lines and grids of single …
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Exploring the possibility of low temperature glazing in faience from the Djoser Step Pyramid through compositional analysis
… results using methods of x-ray fluorescence, environmental scanning electron microscopy, x-ray energy dispersive spectroscopy, x-ray diffraction and microcomputed tomography. It appears that the tile was glazed by the method of "application." There is evidence that may support hypotheses of …
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Composite Films for Modifying Evanescent Wave Characteristics in Long-Period Grating Biosensors
… of the hydrogel was estimated to be 500 nm using Environmental Scanning Electron Microscopy. The affinity film was probed by an evanescent wave to detect changes in refractive index due to the binding of anti-BSA IgG. Under these conditions, the sensor yielded a signal ratio of approximately 10-4 …
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A deeper look into the morphology and receptors found in the tick (Acari: Ixodidae) chemoperception structure, the Haller's organ
… and females for each species were observed using environmental scanning electron microscopy (ESEM). Analyses using geometric morphometrics resulted in low levels of intraspecific, within sex variation in the morphology of Haller’s organ and high variation between species. Differences between …
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Composite gelatin delivery system for bone regeneration
… measurements, swelling studies, optical microscopy, environmental scanning electron microscopy (ESEM), and collagenase degradation. Compressive tests and mercury porosimetry were performed to study the mechanical and structural properties of the scaffold. The biocompatibility of the …
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A study of bone chemistry in forensic applications
… type, soil pH, moisture content and temperature. Environmental Scanning Electron Microscopy (ESEM) allowed the classification of bone samples into two categories of young and old based on differences in surface morphology. X-ray Diffraction (XRD) results showed no changes in crystallinity for a …
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Formulation and characterisation of an effective particulate delivery vehicle for the novel sub-unit vaccine antigen, Ag85B-ESAT-6
… a stable freexe-dried product. Finally, environmental scanning electron microscopy (ESEM) was investigated as a potential alternative to conventional SEM for the morphological investigation of microsphere formulations. Results revealed that the DDA-TDB liposome system proved to be the …
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Solubility enhancement of poorly water soluble drugs using liposome technology
… is governed by the log P of the drug candidate. 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 …
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Investigation of microstructural evolution by real-time SEM of high-temperature specimens.
… boundaries in face centred cubic metals, using Environmental Scanning Electron Microscopy (ESEM).The original aim proved impractical without considerable modification to the microscope technique. The result of this was an imaging technique suitable for "real-time" . characterisation of dynamic …
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Nutrient profile, functional properties, and microstructure of dried waste milk products for use as a potential animal feed
… the microstructure was examined using 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 …
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The dynamics of ultrafast motion in biological and bio-inspired systems: the case study of click beetles
… shapes and sizes is imaged and quantified using environmental scanning electron microscopy (ESEM) and computerized tomography (CT). The kinematics of the ultrafast motion are derived from synchrotron x-ray and natural light high-speed videos. High-speed synchrotron x-ray imaging allows for the …
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Droplet growth kinetics on superhydrophobic surfaces and future work on combating cryogenic surface contamination
… are crucial. In this work, using high-angle environmental scanning electron microscopy (ESEM), I report visualizations of the effect that larger droplets have on the growth rates of nearby smaller droplets. Furthermore, I also hypothesize the underlying mechanism behind this phenomenon and …
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Contributions and New Methods in Paleontology: Geochemical, Ultrastructural, and Microstructural Characterization of Archean, Proterozoic, and Phanerozoic Fossils
… field of study, advanced instruments–commonly electron- and ion- microbeam equipment–have been employed for numerous fossils over the entire range of geologic time, from microfossils to macrofossils and from the Archean (beginning at 3800 Ma) to the Cenozoic (ending at the recent). These …
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Biodegradation studies of polyether polyurethane in a landfill site
… years: the foams were able to absorb water and Environmental Scanning Electron Microscopy (ESEM) photomicrographs taken of the foams have shown a complete disruption of the polymer structure (July 1999). A susceptibility study (July 2000), using microorganisms isolated from the buried foams …
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Development and characterization of micro/nano structured surfaces for enhanced condensation
… same surface during condensation was observed. Environmental scanning electron microscopy was used to demonstrate that initial droplet growth rates of partially wetting droplets were 6 times larger than that of suspended droplets. A droplet growth model was developed to explain the experimental …
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Geo-chemo-mechanical modeling of sedimentary rocks: application to unconventional reservoirs and geological CO2 sequestration
… problems worldwide. Technical challenges and environmental concerns slow the growth of organic-rich shale exploration and exploitation worldwide. Similarly, the technical challenges and lack of financial incentives continue to slow the growth of geological storage of CO¬2 worldwide. The …
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Multidisciplinary research in Raman spectroscopy, phase imaging and their applications in heat transfer
… on transport of intensity equation and depth scanning technique and proved the ultrahigh sensitivity of phase in nanoscale inspection. This developed technology was validated through a number of simulations and experiments, including detecting the deep subwavelength defects on 9 nm …
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Microstructural changes and micronutrient bioaccessibility in soft-solid foods, using a model fresh cheese and in vitro digestion
… pore size, and porosity was analyzed by Environmental Scanning Electron Microscopy (ESEM) micrographs. Three experimental units (containing the lowest and highest protein to fat ratios and lowest and highest homogenization pressures) were selected for vitamin D3 bioaccessibility analysis …
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Seed Germination Performance and Seed Coat Mucilage Production of Sweet Basil (Ocimum basilicum L.)
… sweet basil seeds were examined using light and environmental scanning electron microscopy. The mucilage of basil seeds is held together by columnar structures that unfolded from the pericarp and helped hold and stabilize the mucilage to the outer surface. The mucilage was removed using diluted …
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