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 18 of 18 for “"cyanotoxin"”.
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Investigation of novel methods to remove the cyanotoxin, Cylindrospermopsin, from drinking water.
… form toxic algal blooms. These toxins, known as cyanotoxins, are produced as secondary metabolites by several cyanobacterial species. Cyanotoxins affect not only aquatic ecosystems but also impact on human health. The current work focuses on the cyanotoxin cylindrospermopsin that was originally …
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A toxicological analysis of the cyanotoxin β-methylamino-L-alanine at multiple neural levels and identification of novel modes of activity
The cyanotoxin β-methylamino-L-alanine (BMAA) has long been associated with the elevated incidence of amyotrophic lateral sclerosis/Parkinsonism dementia complex (ALS/PDC). BMAA has been shown to be produced across the cyanobacterial order and its detection has been reported in a variety of aquatic …
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Uptake and depuration of cyanotoxins in the common blue mussel Mytilus edulis.
… shellfish. Currently, no regulations regarding cyanotoxin-contaminated seafood have been established, despite similar toxicity to routinely-monitored marine toxins such as domoic acid (DA). To facilitate regular monitoring, a high-performance liquid chromatography photo diode array (HPLC-PDA) …
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Raman Spectroscopy for Monitoring of Microcystins in Water
… their capacity to produce microcystins and other cyanotoxins that are deadly to humans, livestock, pets, and aquatic life at low doses. Unfortunately, the strategies currently employed for cyanotoxin detection involve laborious analyses requiring significant expertise or bioassay kits that are …
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Toxic cyanobacteria, cyanotoxins and drinking water production in Ghana: implications to human health
… their negative effects on population health. The cyanotoxin, microcystin, the main focus of this research has been responsible for much documented illness in humans and is the most wildly studied cyanotoxin. The World Health Organization has set a guideline limit of 1 µg/l in drinking water.A …
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Evaluating time-series smoothing algorithms for multi-temporal land cover classification
… groundwork to support cyanobacteria and cyanotoxin monitoring efforts. We used inter-class separability and intra-class variability, at varying levels of pixel homogeneity, to evaluate the effectiveness of three smoothing algorithms. Based on these initial tests, the algorithm which …
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The occurrence of toxic and non-toxic cyanobacteria species in water supplies destined for maize meal preparation process: A case study of Vhembe District
… produce secondary metabolites called cyanotoxins, which are harmful to human health. Human exposure to cyanotoxins can occur in various ways, however, the oral route is the most important. This is mainly through drinking water or eating contaminated food. Studies on cyanotoxin …
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Monitoring and regulating cyanobacterial metabolites (microcystins and geosmin) in aquatic systems.
… can cause serious harm to animals and humans (cyanotoxins) and can have a major financial impact on the potable water and aquaculture industries (taste and odour compounds). Understanding the factors that affect cyanotoxin production can help in exploring means for the control of these …
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Effects of Low Bioavailable Nitrogen and Phosphorus on Cyanobacteria Dynamics in Eutrophic Lake Erie
… during 2011, the concentration of the cyanotoxin microcystin was highly correlated with <i>Anabaena</i> biovolume. Genetic diversity of the <i>Microcystis</i> population was assessed during 2011 and showed that diversity was very similar spatially and temporally in spite of the wide …
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Cyanobacteria harmful algal blooms in South Louisiana estuaries : a synthesis of field research, management implications, and outreach
… in their viscera. The study found that the cyanotoxin, microcystin (MC) was present, where the native oysters inhabit (<10 g kg-1). When the oysters were exposed to toxic Anabaena sp. cells, they fed on these cells and retained MCs. This led to a concern for the public health. The last study …
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Understanding spatial and temporal aquatic exposure and hazards of contaminants of emerging concern.
… I identified the importance of understanding cyanotoxin exposure at depth, location, and season, including elevated in locations and during times of the year not commonly examined for routine field assessments. This dissertation identified key considerations for how, when, and where …
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Advanced Applications of Raman Spectroscopy for Environmental Analyses
… the capacity of DCDR to differentiate between cyanotoxin variants in aqueous solutions was demonstrated using principal component analysis (PCA) to statistically demonstrate spectral differentiation. A set of rules was outlined based on Raman peak ratios to allow an inexperienced user to …
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Chlorine dioxide impacts on microcystis aeruginosa cell stress, growth and microcystin production
… hypothesized to trigger increased production of cyanotoxins.;Here, chlorine dioxide (ClO2) was tested to inhibit a toxin-producing strain of Microcystis aeruginosa. Through a series of experiments, ClO2 was exposed to M. aeruginosa, and the production of microcystin was monitored. The first …
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Removal of organic compounds from aquatic environments by advanced oxidation processes.
… contribute to cyanobacteria proliferation, cyanotoxin 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 …
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The destruction of the cyanobacterial toxin microcystin-LR by semiconductor photocatalysis.
… human poisonings resulting from the presence of cyanotoxins in potable waters, some of which have resulted in fatalities. The most frequently cited cyanotoxin in these poisonings has been microcystin-LR, which has prompted the World Health Organisation (WHO) to set a guideline for the recommended …
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Factors affecting the growth and toxin content of key cyanobacteria species in a changing world.
… amongst these are many potent toxins (cyanotoxins), which can present substantial risks to human, animal and environmental health. Where risk mitigation strategies are implemented, they are usually based on cyanobacteria cell counts. However, not all cyanobacteria taxa produce toxins, …
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Cyanobacteria Abundance and Toxin Production in a Drinking Water Supply Reservoir
Cyanobacteria are prokaryotic organisms that live in marine and freshwater environments and are most common during the warmer months. Many cyanobacteria are also known to release toxins that target cellular processes and affect a wide range of organisms, including people. Although the effects of …
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Flow Cytometric Analysis for Cyanobacteria in 36 New Jersey Freshwater Bodies
<p>Eutrophication, a process that occurs due to excessive accumulation of nutrients such as nitrogen and phosphorous is primarily from anthropogenic nitrogen and natural occurrences. This phenomenon causes cyanobacterial overgrowth which can potentially lead to toxic algal blooms that affect public …