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 6 of 6 for “"ultra-high resolution mass spectrometry"”.
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Investigating the Molecular Composition of Rainwater and Secondary Organic Aerosol using Ultra-High Resolution Mass Spectrometry
… were observed in the rainwater. HYSPLIT air mass backward trajectories revealed that both air mass origin and seasonality had strong influences on the sample composition. Samples collected during the summer and samples influenced by the Sahara desert contained the most compounds due to …
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Microbial adaptation to dissolved organic matter in freshwater ecosystems
… Using full length 16S amplicon sequencing and ultra-high resolution mass spectrometry, I tracked how the six-species community changed in composition over a 14-day incubation on each source and characterized how the microbes reworked the DOM. I further correlated changes in species abundances …
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The role of copper in aquatic photochemistry of dissolved organic matter
… degradation of all contaminants occurred even in high chloride solutions. The inhibitory effect of Cu was found to decrease with the increase in Cl‒ concentration due to the change in the Cu(I) speciation from reactive Cu(I)-DOM complexes to less reactive Cu(I)‒Cl complexes. In Chapter 3, …
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IMPACT OF CONVENTIONAL AND PRECISION CATTLE MANURE APPLICATION METHODS ON HORMONE CONCENTRATIONS AND ACTIVITIES IN SURFACE WATER AND SOIL
… and quantified by liquid chromatography ultra-high resolution mass spectrometry, while hormone activities were assessed by in vitro bioassays. Targeted analytes included trenbolone acetate, 17α-trenbolone, 17β-trenbolone, trendione, melengestrol acetate, and melengestrol. No target …
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The complexity of bioinformatics: techniques for addressing the combinatorial explosion in proteomics and genomics
… from the development and proliferation of high-throughput data gathering and analysis pipelines. In order to transform this data into useful hypotheses and conclusions, it is necessary to determine which of it is pertinent to the problem being studied, and sometimes, conversely, which of …
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Unravelling the impacts of palaeoecology, palaeoenvironment and lithofacies on sedimentary organic NSO compounds
… but now this range has been extended, thanks to ultra-high resolution mass spectrometry. This thesis utilises that technique to provide information on biomass input, depositional conditions and lithofacies-influenced fractionation using heavy NSO compounds, thus complementing and supplementing …