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 7 of 7 for “"Ion fragmentation"”.
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Characterization of an iodine-based ionic liquid ion source and studies on ion fragmentation
… a well studied source of charged droplets and ions. A specific subclass is the ionic liquid ion source (ILIS), which produce ion beams from the electrostatically stressed meniscus of ionic liquids. ILIS have several applications, two of which include space propulsion and focused ion beam …
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Application of scanning micro-tip and UHV Kelvin probes in surface and material characterisation.
… mapping and monitoring changes in work function due to environmental influences in ambient and UHV conditions. The SKP is a truly non-contact technique which determines local work function changes and surface states on conductors, semiconductors and even insulators. It measures the contact …
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Identification of fire gases in early stages of fire in laboratory scaled and full scale fire experiments
A series of reduced scale emulations of standard fires in a 2 m3 enclosure have been developed for studies at laboratory scale enabling useful comparison and correlation with full scale EN54/7 and UL268 test fires. This makes study of standard test fire conditions and products substantially more …
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Heavy-Ion Interaction Models for Radiation Transport
<p>This dissertation is concerned with finding the values for the nuclear cross sections used in the Boltzmann equation for space radiation transport and dose estimates. An extraordinary number of cross sections are required because of the large number of ion types and their extensive energy range, …
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Theoretical and experimental investigation into the IR-VUV ion dip spectroscopy of amino acids and analogue systems
… studies can be very useful in obtaining information about molecular species (in this case various naturally occurring amino acids), the use of computational and theoretical methods can aid these studies in providing a more complete understanding of the properties and behaviors of these species. …
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Novel methods for manipulating ion types in the solution and gas phases for the structural analysis of biomolecules using Mass Spectrometry
… to many fields. The advent of nanoelectrospray ionization (nESI) as a soft/low energy ionization technique has enabled the analysis of large, intact biomolecules. Most mass spectrometry experiments consist of three main steps: ionization, probe step(s), and mass analysis. The present work …
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Stability of bioactive isoflavones and glycolytic enzymes produced by probiotic bacteria in soy based food during processing and storage
… enzyme that could be used in the bioconversion of the predominant soy isoflavone glycosides to their bioactive aglycone forms. Fifteen probiotic micro-organisms that included Bifidobacterium sp., Lactobacillus acidophilus and Lactobacillus casei were screened for β-glucosidase activity using …