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Showing 1 to 20 of 24 for “"microchemistry"”.
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Microchemistry of Copper Infiltrated Iron Powder Compacts
Made available in DSpace on 2014-12-12T01:04:05Z (GMT). No. of bitstreams: 1 7212172.pdf: 992449 bytes, checksum: 14c9a338ff737e84d92e7596a96204c2 (MD5) Previous issue date: 1971
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Microstructure and Microchemistry of Rapidly Solidified Nickel-Base Powders
An investigation of the microstructure and microchemistry of rapidly solidified powders was conducted using transmission electron microscopy in the scanning (STEM) and conventional (CTEM) modes. Using these high resolution techniques, it was possible to study the morphologies of the resultant …
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Microstructure and Microchemistry of Titanium-Carbide Coated Cemented Carbides
A microchemical and microstructural analysis of TiC-coated cemented carbides has been performed using a variety of contemporary micro-analytical techniques: Auger Electron Spectroscopy, STEM X-ray microchemical analysis and electron energy loss spectroscopy. As most of the analytical technique
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Phases, microstructures, and microchemistry of silicon carbide-based ceramics
Pure SiC. Transparent, translucent and opaque regions of high purity bulk SiC grown by chemical vapor deposition (CVD) were characterized for physical properties as well as for microstructure and chemical purity to correlate the degree of optical transparency with other material characteristics. A …
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Variability in red snapper otolith microchemistry among Gulf of Mexico regions
Red snapper, Lutjanus campechanus, has been an economically important reef fish in the Gulf of Mexico (Gulf) for over 150 years and is currently overfished. Catch statistics and demographic differences have lead to the population being categorized into eastern and western substocks divided by the …
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A laser-assisted microchemistry system for the fabrication of small electromechanical devices
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1994.
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Processing and microstructure of standard and modified macro-defect-free cements
Evolution of macro-defect-free microstructure and microchemistry was studied by TEM/EDS and SEM/EDS. MDF samples were prepared through an alternative, Banbury mixing route. Experiments with varying mixing time at constant mixing rate showed that an intimate distribution of constituents in the …
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Role of low-energy ion/surface interactions in controlling microstructure and texture evolution during film growth
The effects on microstructure and microchemistry of ion irradiation during AlCu film growth on a-SiO$\sb2$ by two directional sputtering techniques--collimated magnetron sputter deposition (CMSD) and ionized magnetron sputter deposition (IMSD)--were investigated. Both sets of films have dense …
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The Degradation of Spatial Resolution in Thin Foil X-Ray Microchemical Analysis Due to Plural Scattering of Electrons
… has been made to determine how the apparent microchemistry of a feature of finer dimensions than the broadened beam differs from the actual composition of the given feature.
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Preparation and characterization of metal/sapphire and metal/polyimide thin film laminates
… laminates through studies of microstructure and microchemistry. Systems studied were: Ti/sapphire, Au/Cu/Ti/PI/Si and Cr/Cu/Cr/PI/Si. In the Ti/sapphire system, there was an additional interest to understand the effect of growth temperature on growth orientation and crystal quality of the films. …
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Pelagic dispersal and population connectivity of the green-lipped mussel (Perna canaliculus) in the Bay of Plenty
… were confirmed to correlate with the shell microchemistry and have the potential to improve the performance of the microchemical methods. In addition, the pathways of mussels traveling to the offshore mussel farm were specifically cross-validated by two biophysical particle modelling …
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A Study of Amorphous Hydrogenated Titanium-Carbide Films: Structure, Stability, and Role of Hydrogen Doping
… to an understanding of the film morphology and microchemistry, and to a quantitation of H concentrations in the coatings. This work necessitated, in a preliminary stage, performing MOCVD of the Ti-coordination compound titanium-bipyridine and completing the characterization studies started by …
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Relating Water and Otolith Chemistry in Chesapeake Bay, and Their Potential to Identify Essential Seagrass Habitats for Juveniles of an Estuarine-Dependent Fish, Spotted Seatrout (<i>Cynoscion nebulosus</i>)
… and [Sr/Ca]<sub>water</sub>. Otolith microchemistry of juveniles collected in 1998 and 2001 was significantly different among habitats within and between years, but the ability of trace elements to allocate individual fish to natal habitats was variable (0–82%). However, the …
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Stress corrosion cracking behavior of friction stir processed ultrafine grained light metal alloys
… peak aged was attributed to the alteration in microchemistry and precipitate morphology in the matrix"--Abstract, page iv.</p>
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The Importance of Thermal Habitat Quality for Pumpkinseed (Centrarchidae: Lepomis gibbosus) in Small and Constructed Coastal Embayments Along the Northwest Shoreline of Lake Ontario
… from warmer to cooler embayments. Using otolith microchemistry to identify natal embayments of fish, I confirm that age-0 and age-1 pumpkinseed, as well as age-0 largemouth bass (Micropterus salmoides) and age-0 yellow perch (Perca flavescens), exist in metapopulations. Embayment bathymetry is a …
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Microemulsions formation, stability and their characterisations
… been used to characterise and understand the microchemistry of the microemulsion systems. Ultra-low interfacial tensions (>0.1 µN/m) can be achieved in the microemulsion systems. Surfactant transfer between phases, and phase inversion of micro emulsions are shown to occur around the condition …
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Maturation, Fecundity, and Spawning Frequency of the Albemarle/Roanoke Striped Bass Stock
… since their study and in recent years, otolith microchemistry with concentrations of elements such as strontium (⁸⁸Sr) has been used to determine movement and migration of different species to delineate movement from freshwater to more saline environments. The objectives of this study were to …
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Survival, Abundance, and Relative Predation of Wild Rainbow Trout in the Deerfield Reservoir System, South Dakota
… the use of stable isotope analysis and otolith microchemistry for the classification of wild and hatchery Rainbow Trout origins. Juvenile Rainbow Trout were not found in the diets of Rock Bass Ambloplites rupestris, Yellow Perch Perca flavescens, and adult (>200 mm) Rainbow Trout in Deerfield …
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A study of amorphous hydrogenated titanium carbide films: Structure, stability, and role of hydrogen doping
… to an understanding of the film morphology and microchemistry, and to a quantitation of H concentrations in the coatings. This work necessitated, in a preliminary stage, performing MOCVD of the Ti-coordination compound titanium-bipyridine and completing the characterization studies started by …
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Ecology, Growth, and Migration of Pseudoplatystoma fasciatum in the Amazon Basin
… catfish P. fasciatum. Finally, I used otolith microchemistry to understand the migration ecology of P. fasciatum in the Amazon Basin. I found an inverse relationship between increment width in fish hard parts and hydrological indices. I also found that growth of P. fasciatum was no different in …
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