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 “"bioconcentration"”.
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Impact zone delineation for biological assessment of power plant effluent effects on snail populations in the Clinch River
… habitat alterations (e.g. periphyton changes and bioconcentration) was unclear. Feeding studies were conducted to estimate impact of aufwuchs bioconcentration of metals on snails. Leptoxis significantly bioconcentrated Cu when fed aufwuchs containing 564 (±269) ug Cu/g in artificial stream feeding …
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The use of Chironomus riparius (Diptera: Chironomidae) in benthic toxicity tests and its response to selenium
… burden. 3. Determine whether bioaccumulation or bioconcentration contributed more to the selenium content and body burden of individual larvae. 4. Determine selenium concentrations which were acutely and chronically toxic to C. riparius, and whether previous exposure changed the acutely toxic …
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Bioprospecting of plants species with potential to uptake inorganic chemical species from gold mine tailings and acid mine drainage
… the shoots except Se. Cortaderia selloana showed bioconcentration factor greater than 1 for chemical species such as B, Mn, Zn, Sr, Ca, Mg, P, and Si. Similarly, Populus alba showed the bioconcentration greater than 1 for Mn, Ni, Cu, Sb, Na and Mg. In addition, Populus alba showed bioconcentration …
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Characterizing the Developmental and Reproductive Toxicities of Cannabidiol and Δ9-Tetrahydrocannabinol
… during waterborne exposure as well as the bioconcentration in zebrafish. Following a developmental exposure, CBD posed similar risk to development, reproduction, and behavior as THC, but at much lower concentrations. Also, CBD bioconcentrated in zebrafish more readily than THC. To our …
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Characterising the functional homology of central nervous system drug targets in larval zebrafish (Danio rerio)
… zebrafish. Compound-specific differences in bioconcentration and toxicity were observed, and bioconcentration factors (BCFs) were determined for 8 of the 9 compounds. The uptake of gabapentin was below the instruments limit of detection. Sub-lethal endpoints, including touch responsiveness, …
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Development of Alternative Methods to Assess the Toxicity and Bioaccumulation Potential of Chemicals in the Aquatic Environment
… the whole body biotransformation rate and bioconcentration factor of chemicals in fish. As a consequence of this investigation, an insight into the main challenges and future perspectives for each of the methods evaluated was conducted to provide a foundation for future research. The last …
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Tolerance Determination of Certain Benthic Invertebrates as Indicators in River Water Quality Monitoring
… variable conditions of water hardness, and the bioconcentration of zinc was demonstrated by the use of radioisotopes. Additional experiments investigated the acute toxicity of ammonia and two pesticides to the larvae. The effect of temperature, dissolved oxygen and pH on the respiration rate of …
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Development and Standardization of a Short-Term Assay for Evaluating Polluted Estuarine and Coastal Environments: The Medaka Embryo-Larval Assay
… embryos. In addition, it appears that if the bioconcentration factor (BCF) is well established for a chemical, it may be possible to extrapolate to an equivalent medium concentration for a given topical dose. The permeability data indicate that the toxicants penetrate into the eggs at levels …
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Spatially distributed bioaccumulation risk analysis: a GIS-based tool and a case study of polychlorinated biphenyls in the Great Lakes
… have a great fi ltration capacity and high bioconcentration rates, increasing the bioavailability of contaminants for predator species. PCBs concentrations in different-level predators are predicted. Furthermore, health risks for humans that consume sport fi sh are estimated for different …
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Development of a three-trophic level toxicity test utilizing an alga (Chlorella vulgaris), rotifer (Brachinous calyciflorus), and fish (Pimephales promelas)
… day 20 indicating a more subtle trophic impact. Bioconcentration factors ranged between 100 and 1000 µg/L and were found to be dependent on the species, treatment, and day.
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Development of new tools for the agroindustrial effluent control : risk-hazard quantitation
… effluent toxicity of a mixture, but also the bioconcentration potential and the persistence of the compounds present in the effluents. Additionally, a mathematical model has been set up allowing the prediction of the environmental risk produced by effluents spilling into a specific river basin …
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Pharmaceuticals removal in soil following wastewater land application
… to trimethoprim while the calculated plant bioconcentration factor for trimethoprim was higher than carbamazepine. The results indicate that the mean accumulated amount in the grass samples are significantly (p<0.05) higher than the mean accumulated mass in the soil samples. The total mass …
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Combining phytoremediation with bioenergy production; exploring options for sustainable remediation
… contaminants into its aboveground tissues (with bioconcentration factor and translocation factor ranging from 0.81 – 0.94), and this was enhanced significantly by the application of plant growth promoting bacteria, Bacillus aryabhattai (with bioconcetration and translocation factor > 1 for all …
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Pharmaceuticals in the Environment: Assessing Potential Risks to Fish
… samples were used to study tissue-specific bioconcentration of APIs, as well as changes in gene transcript levels and metabolic enzyme activity following in vivo exposures to three of the case-study APIs (quetiapine, MPA and olaparib). These studies revealed the complexity and heterogeneity …
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Bioaccumulation and Toxicokinetics of Polycyclic Aromatic Compounds and Metals in Giant Floater Mussels (Pyganodon grandis) Exposed to a Simulated Diluted Bitumen Spill
… day-1, n=87) kinetic rate constants, as well as bioconcentration factors (log values from 3.85 – 6.12 L kg-1, n=87) for the 29 PACs that bioaccumulated in mussels suggested that alkylated PACs have greater bioaccumulation potential compared to their parent PAC counterpart. Results from this study …
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Climate Change and Dissolved Organic Matter in Subarctic Lakes: Relevance to Methylmercury Bioavailability
One of the first steps of methylmercury (MeHg) bioaccumulation, uptake by phytoplankton, is regulated by dissolved organic matter (DOM). Methylmercury binds strongly with DOM, especially high-molecular weight (HMW) compounds containing reduced sulphur; this binding decreases MeHg bioavailability. …
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Quantification of the bioccumulation potential of various chemical elements from coal fly ash using Brassia juncea and Spinacia oleracea L and its implication for phytoremediation of coal fly ash dumps
… human beings, hence phytoremediation is vital. Bioconcentration factor (BCF) was used to estimate the metal species accumulation ability of the plants from the FA, FA/soil mixtures, while translocation factor (TF) was used to assess the plant species potential for phytoremediation of coal fly …