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 165 for “"Surface Analysis"”.
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Surface analysis of self-assembled monolayers by mass spectrometry.
Surface analysis of self-assembled monolayers by mass spectrometry.
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Cell surface analysis of the basidiomycete yeast cryptococcus neoformans
Cell surface properties of the basidiomycete yeast Cryptococcus neoformans were investigated with a combination of novel and well proven approaches. Non-specific cell adhesion forces, as well as exposed carbohydrate and protein moieties potentially associated with specific cellular interaction, …
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Surface Analysis Applied to Thin Films of Molecular Solids
Finally, some preliminary results with polymer film assemblies were presented. Although the major problems of charging and film rupture were avoided, the research was handicapped by a loss of the components of interest, which were low concentration of organic compounds dispersed in the polymer …
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Trend-Surface Analysis of the Trunk Lake Granitic Pluton, Maine
<p>A trend-surface modal analysis of the Tunk Lake granitic pluton was performed using a program for the IBM 30/40 computer (Appendix 1) by Heiner and Geller (MIRL Report No. 9) and data from Karner (1968). The quartz, total mafics, oligoclase, perthite, and albite in perthite percentages were …
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Surface analysis of a black coating from Little Lost River
… spectroscopy (XPS) to characterize the outermost surface of the black coating to understand how it was formed. Carbon and oxygen predominated in the XP spectra, whereas nitrogen was detected at varying levels in different samples. High-resolution carbon 1s XP spectra showed that carbon was present …
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Thin optic surface analysis for high resolution X-ray telescopes
… x-ray telescopes require thin optics with large surface area to thickness ratio and a surface flatness of -500 nm. A novel method utilizing porous ceramics, which provide a thin layer of air for sheet glass to rest on during the shaping process, is investigated. The shaping process involves …
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Surface analysis of sodium oleate coated poly (ethylene terephthalate) films
Polymer films are often pre-treated to alter surface properties resulting in improved adhesion and wettability. The objective of the present work was to demonstrate the applicability of surface-sensitive techniques in the analysis of polymer films coated with thin overlayers. The surface or …
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Surface analysis of sheet molded composite (SMC) material as related to adhesion
The surface chemical properties of Sheet Molded Composite (SMC) materials, formulated to contain polyester binder, calcium carbonate filler, and glass fibers, have been investigated with emphasis on how the surface properties are related to adhesion. These surface properties, relative elemental …
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Design and Construction of a High Vacuum Surface Analysis Instrument to Study Chemistry at Nanoparticulate Surfaces
… laboratory used to investigate fundamental gas-surface interactions require extensive time and effort to achieve operating conditions. This thesis describes the design and construction of a high-throughput, high vacuum surface analysis instrument capable of studying interactions between CWA …
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Vibrational Spectroscopy and Potential Energy Surface Analysis of the X˜ And B˜ States of Thiophosgene
… A full six-dimensional potential energy surface transformed to a normal coordinate representation has been fit to the experimental X˜(1 A1) levels up to 8,000 cm-1. A six-dimensional multi-reference PES has also been fit, to a series of CASSCF ab initio calculations modeling the …
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The role of surface pretreatment and surface analysis in the bondability of carbon fiber-polyimide matrix composites
The effect of surface pretreatment on the physical and chemical properties of carbon fiber-polyimide matrix composite surfaces was evaluated. Eight pretreatments were studied: methanol wash, gritblast, sulfuric acid soak, ammonia plasma, argon plasma, argon plasma followed by ammonia plasma, …
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Response surface analysis of high fructose corn syrup cakes emulsified with sucrose esters and mono- and diglycerides
… oil phase with and without emulsifiers. Response surface methodology (RSM) was employed to predict the levels of HFCS required with and without emulsifiers to produce cakes of relatively high volume, moistness, tenderness and low aftertaste. Cakes prepared with HFCS as a partial or complete …
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Laser surface thermal lensing (STL): An optical method for surface analysis of glass transition effects in transparent polymers
… cyclic thermal expansion and contraction of the surface at the pump beam focus. This minute distortion of the surface forms a transient optical lens structure, which can be monitored by the changes it induces in a second laser beam reflected at an angle off the same focal point. The Surface …
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Predictive modeling of the aerobic growth of <i>Staphylococcus aureus</i> 196E using a nonlinear model and response surface analysis
… using a modified Gompertz function and response surface methodology. Each predictive equation required the estimation of only 23 parameters with a biological meaning. These models determined the significance of time, incubation temperature, sodium chloride (NaCI) concentration, and either pH or …
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The use of 3D surface analysis techniques to investigate the wear of matt surface finish femoral stems in total hip replacement
… of wear behind the loosening and failure of matt surface finish femoral stems. By examining stems which have been explanted from patients, a method of wear classification has been developed, and also 3D surface measurement techniques have been employed to quantify wear through parametric …
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I. Mechanism of Ethylidyne Formation on Ni(111) and II. Design of a Molecular Beam-Surface Scattering and Surface Analysis Instrument
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1997.
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Design and development of a time of flight fast scattering spectrometer : a quantitative surface analysis technique and a new approach towards the experimental investigation of the surface particle interactions
A new surface analysis technique has been developed which has a number of benefits compared to conventional Low Energy Ion Scattering Spectrometry (LEISS). A major potential advantage arising from the absence of charge exchange complications is the possibility of quantification. The instrumentation …
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Adsorption of cobalt on gamma-Fe{u2082}O{u2083}
… in solution under alkaline conditions. The surface of cobalt-treated gamma-Fe₂O₃ was characterized using the surface analysis techniques of x-ray photoelectron spectroscopy (XPS) and secondary ion mass spectroscopy (SIMS). Characterization was also accomplished using infrared spectroscopy …
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An Analysis Of Phenetic Variation In The Least Shrew Cryptotis Parva (Say)
… from 37 localities were subjected to an analysis of variance, a Student-Newman-Keuls multiple range test and trend surface analysis. A phenogram was computed by cluster analysis by the unweighted pair-group method using arithmetic averages. The phenogram was not found to show distinct …
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