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.
Results
Showing 1 to 20 of 28 for “"Time-of-flight secondary ion mass spectrometry"”.
-
Time-of-Flight Secondary Ion Mass Spectrometry Analysis of Microbial Induced Corrosion of Glasses
Microbially-induced corrosion (MIC) is an emerging topic that has huge environmental impacts, such as long-term evaluation of microbial interactions with radioactive waste glass, environmental cleanup and disposal of radioactive material, and weathering effects of microbes. Improved understanding …
-
The role of complexing agents in the flotation of pentlandite-pyroxene mixtures
… agents play in pentlandite-pyroxene flotation and focuses on the surface chemistry and interaction between valuable and gangue minerals as well as the interaction of complexing agents and reagents (xanthate, copper sulphate) in the system at pH 9. Microflotation, zeta potential …
-
Pentlandite-pyroxene and pentlandite-feldspar interactions and their effect on separation by flotation
… focused on exploring the extent to which metal ion activation occurs and influences flotation and how this can be managed so as to increase the separation of pentlandite from pyroxene and feldspar. The aim was to minimise the percentage pyroxene and feldspar reporting to the concentrate and …
-
Site-specific immobilization of tetrazine-modified green fluorescent protein on trans-cyclooctene surfaces
The ability to control the orientation of proteins attached to a surface, one of the goals of this work, has applications within areas such as microarrays, biomaterials, tissue engineering and biosensors. Non-covalent protein adsorption (physisorption), the easiest of all protein-attachment …
-
Gold Nanomaterial–Biomolecule Interactions: Influence of Size, Gold Nanomaterial–Biomolecule Interactions: Influence of Size, Surface Chemistry, and Environment Surface Chemistry, and Environment
… as great candidates for biomedical applications because of their physicochemical properties and high biocompatibility. However, their performance strongly depends on their interactions with biomolecules and their stability under physiological environments. This dissertation investigates the …
-
Hybrid organic-inorganic nanomaterials for applications at the biointerfaces
In the last few years, the application of nanomaterials (NMs) as theranostic devices, which combine diagnostic and therapeutic features, has gained a tremendous interest and development. Still, the major challenge is the understanding of the many and often complex processes that occur during the …
-
Identification of esters in carious dentine Staining and chemo-mechanical excavation
… clinically seen as a yellowish-brown discoloration that can be explained by the reactions between proteins and sugars resulting in Maillard products. However, the discoloration of carious dentine is an imprecise indicator of whether or not the dentine is caries free. Other processes might act in …
-
CRYOGENIC MICROSCOPIES OF ENERGY STORAGE MATERIALS: INSIGHTS INTO METAL ANODES, SOLID-ELECTROLYTE INTERFACES, AND MXENES
… global energy demand has intensified the pursuit of high energy density storage technologies, focusing on metal anode systems that promise higher energy density at lower cost. This dissertation presents comprehensive research that advances our understanding of energy storage materials, including …
-
Nanomechanical Properties of Polymer-Grafted Nanoparticle Ultrathin Films
Polymer thin films have recently become one of the most emerging research areas due to their profuse applications in energy storage, flexible electronics, and photonics. The mechanical response of polymer thin films is crucial in defining a high-performance device encompassing the film’s …
-
Characterization, Functionalization and Applications of Alkyl Monolayers on Silicon Surfaces
<p>Investigations were performed on the stability, mechanism of formation and an application of alkyl monolayers chemomechanically prepared on silicon surfaces. A new method of surface modification, laser-activation modification of surfaces (LAMS), and multivariate analyses of time-of-flight …
-
Identification and imaging different lipid species within phase-separated model membranes by integration of TOF-SIMS and principal component analysis
Time of flight secondary ion mass spectrometry (TOF-SIMS) enables chemically imaging the distributions of various lipid species in model membranes. However, discriminating the TOF-SIMS spectra of structurally similar lipids is very difficult because the low mass fragment ions that are abundant in …
-
Role of nitrogen in the structure and properties of proton irradiated 12Cr1MoWV ferritic/martensitic steel for advanced nuclear reactor cores, The
… development. As such, understanding the relationship between microstructure and mechanical properties in the context of irradiation environments for these steels is critical. Nitrogen content has been hypothesized to have a significant effect on the irradiated properties of alloy HT9. In this …
-
Analysis of Endogenous Particles in Exhaled Air
… from the respiratory tract. The precise location in which exhaled particles are formed is unknown, and details on their chemical content are scarce. The aim of this work was to chemically characterize and to study the mechanisms of formation of endogenous particles in exhaled air. A new …
-
Lithium protects the juvenile brain from ionizing radiation
Radiotherapy used in the treatment of brain tumours in children results in a range of cognitive dysfunctions that impact the quality of life in the surviving population. In past decades, great strides were made in understanding the cellular and molecular aetiology of these deficits. Postnatal …
-
Application of imaging TOF-SIMS in cell and tissue research
This thesis is aimed at extending the use of TOF-SIMS (time of flight secondary ion mass spectrometry) as an analytical tool in cell and tissue research. TOF-SIMS is a relatively new method that allows analysis of the chemical composition of sample surfaces. Originally, it was used for imaging the …
-
Small molecule profiling and imaging of the zebra finch song system
The ability of songbirds to communicate though learned vocalization and the discovery of discreet interconnected “song nuclei” involved in vocal learning has made them a valuable model to study the neuronal mechanisms behind learning and memory. This dissertation focuses on studying small molecules …
-
Methods for the analysis of low-Z plasma facing surfaces in magnetic fusion applications
A number of advances in the design and operating performance of magnetic fusion devices have been made in recent decades. While the optimization of reactor components and magnetic topologies have led to considerable improvements in plasma density, temperature, and confinement time, research also …
-
Investigation of the Structure of Alkyne Self-Assembled Monolayers on Gold and the Development of Matrix-Enhanced Secondary Ion Mass Spectrometry Methods
Characterization of thin films is critical to the understanding of many technological and biological processes. The focus of this dissertation is to develop methods to characterize very low concentration species present on surfaces. A reflection adsorption infrared spectroscopy: RAIRS) system was …
-
Influence of impurities on the crystallisation of pharmaceutical materials
The major part of this thesis describes work done to investigate the organic and inorganic impurity content in metformin hydrochloride samples and their effect on induction time and nucleation kinetics. Crystallisation from solution plays a significant role in the pharmaceutical, chemical and food …
Page 1 of 2