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 159 for “"aquatic environments"”.
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Antimicrobial resistance gene monitoring in aquatic environments
… resistance gene (ARG) dissemination in the aquatic environment. The work opens with a review of the relevant literature and outlines the importance of an environmental framework for monitoring ARG dissemination as part of antimicrobial resistance risk assessments. The ability to interrogate …
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Aspects of the biogeochemistry of carbohydrates in aquatic environments
… distribution and diagenesis of carbohydrates in aquatic environments. The following questions are studied: what is the carbohydrate composition of sediment in different environments (e.g., deep-sea oxic; shallow-sea oxic; deep-sea anoxic; fresh-water anoxic; brackish-water anoxic, etc.)? How does …
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Microplastics as a vector for micropollutants in aquatic environments.
… (16-97%). More worrying if available to aquatic life, the more toxic compounds (MC-LW, -LF, and fluoxetine) adsorbed in greater amounts onto the microplastics. For the microcystin analogues, results demonstrated the more toxic and more hydrophobic microcystin analogues (MC-LW and -LF) …
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Aspects of the biogeochemistry of carbohydrates in aquatic environments.
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Science, 1973.
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Modeling the Dissemination of Antibiotic Resistance in Aquatic Environments
The emergence of antibiotic resistance in riverine systems has become a growing issue worldwide. The use of watershed-scale models is popular with many other water quality issues but not in the case of antibiotic resistance. In this study, we introduce a watershed-scale bacteria fate and transport …
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Removal of organic compounds from aquatic environments by advanced oxidation processes.
… contamination and pesticide pollution in aquatic environments. Conventional treatments can be ineffective for the removal of high cell densities of cyanobacteria, dissolved toxins and pesticides. Therefore, complementary technologies are required to effectively remove these contaminants at …
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Modeling Fecal Indicator Bacteria and Antibiotic Resistance in Diverse Aquatic Environments
The detrimental influence of humans on the environment is of increasing concern. Humans, their livestock, and their pets have caused fecal contamination of waterways throughout the United States. Understanding the sources of fecal indicator bacteria (FIB) and the environmental processes that affect …
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Low temperature sequestration of photosynthetic pigments: Model studies and natural aquatic environments
… conditions that occur in many natural anoxic aquatic environments (low temperature, moderate pH, presence of H2S and limitation of oxygen). This has enabled a mechanism to be proposed to explain the formation of these derivatives in nature and provided valuable insight into their environmental …
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Potamanautes warreni biomarker assays to monitor silver nanomaterial contaminants in aquatic environments
… releases. Like many other toxins, the aquatic environment is particularly vulnerable as it acts as a sink for nanoparticles (NPs) (Scown et al., 2010). The escalating growth of NMs has not advanced without efforts to understand its properties. Despite the dramatic advances in both the …
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Chemical methods for the study of metal-ligand interactions in aquatic environments.
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Chemistry, 1977
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Monitoring the Transport of Microorganisms in Aquatic Environments Using Unmanned Surface Vehicles
… AWI is an important ecological zone in natural aquatic habitats that governs transport of material and energy between bodies of water and the atmosphere. Little is known about temperature profiles and biological transport across the boundary layers at the air-water interface, and how wind …
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Algorithm development for characterizing coastal and inland aquatic environments using satellite remote sensing
Coastal and inland aquatic environments are among the most ecologically rich and socioeconomically vital systems on Earth, playing a crucial role in sustaining ecological balance, supporting biodiversity, and enabling socio-economic activities. However, they are increasingly vulnerable to the …
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Improving the risk assessment of short-term stormwater and effluent discharges to aquatic environments
… with differing concentration-profiles to the aquatic environment, unintentionally (e.g., stormwater overflow) or intentionally (e.g., licensed industrial discharges). In the dynamic aquatic environment chemical concentrations can fluctuate, resulting in short-term exposures of organisms. …
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GENOMIC SURVEILLANCE AND RISK-BASED ASSESSMENT OF ANTIBIOTIC RESISTANCE TRANSMISSION ACROSS TROPICAL AQUATIC ENVIRONMENTS
… resistance (AMR) transmitted through aquatic environments poses a growing public health threat, yet the genomic mechanisms governing resistance gene flow across interconnected water systems remain poorly understood. This thesis investigates β-lactam resistance transmission across …
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A novel trimodal sensor for eddy correlation measurements of benthic flux in aquatic environments
Quantifying chemical fluxes between natural waters and their benthic sediments is a central problem in biogeochemistry, yet it is notoriously challenging. A relatively new method for measuring benthic fluxes, Eddy Correlation (EC) addresses many shortcomings of traditional techniques. Minimally …
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Optimization of extraction techniques for the isolation and pre-concentration of pharmaceuticals in aquatic environments
Dissertation submitted in fulfilment of the requirements for the degree Master of Applied Science: Chemistry, Durban University of Technology, 2021.
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Assessing Brook Stickleback (Culaea inconstans) as a bioindicator for endocrine disrupting compounds in aquatic environments
… reproduction, development and behaviour in aquatic organisms. A thorough evaluation of the impacts of EDCs on aquatic organisms is currently limited by a lack of robust biomarkers in small model fish, particularly for assessing EDCs with (anti-)androgenic activity. Male sticklebacks build …
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The Restorative Potential of Public Aquariums: Psychological and Physiological Effects of Viewing Sub-Aquatic Environments
The role of natural environments, especially ‘green space’, in promoting human health and well-being is well-researched. However, less is known about the benefits of ‘blue space’ (e.g. the coast) or ‘managed’ nature (e.g. zoos). In this thesis, six studies investigated the restorative potential of …
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Species distribution, phylogenetic structure and functional roles of detritus inhabiting fungi across contrasting aquatic environments
Freshwater fungi play a key role in plant debris decomposition, are pivotal in transferring energy and nutrients to higher trophic levels, and are essential for removing toxic heavy metals and degrading xenobiotics. In light of global climate change, habitat loss, and water pollution, it has become …
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