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 54 for “"Daphnia magna"”.
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QSAR studies of surfactant toxicity to Daphnia magna.
… of general formula R-CH(S03"Na +)-C02-R' to Daphnia magna. Due to structural similarities of this class of anionic surfactant to linear alkylbenzene sulphonate (LAS), it was considered that the log P based QSAR originally developed to describe the toxicity of LAS to D. magna (Roberts, 1989) …
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Novel approaches to toxicity testing in Daphnia magna
… as a novel method for toxicity testing using Daphnia magna. Initially I evaluated the potential application of Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) based metabolomics for use in regulatory toxicity testing. Subsequently, I aimed to use this approach to …
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Application of Adverse Outcome Pathway framework in assessing nanogold exposure to Daphnia magna
… of these NMs especially at the molecular level. Daphnia magna is a planktonic crustacean known to be a filter feeder ingesting particles, microorganisms, and many other unicellular and filamentous algae species found in aquatic environment. Daphnia magna is an internationally recognized test …
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Anti-Ecdysteroidal Activity and Associated Toxicity of Environmental Chemicals in the Crustacean Daphnia magna.
… and reduced fecundity in the crustacean Daphnia magna. The molting effect and embryotoxicity of fenarimol were abrogated by co-exposure to exogenous 20-hydroxyecdysone. These experiments demonstrated that ecdysteroids are critical to normal embryo development and chemicals that lower …
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Effets sous-létaux d'un mélange de contaminants d'intérêt émergent sur l'espèce modèle Daphnia magna
… variations de la concentration en 20E chez D. magna. Ce bioessai a été développé à partir d’une méthode LC-MS/MS existante et de la ligne directrice de l’Organisation du Commerce et du Développement Économique (OCDE) n°211. Grâce à la combinaison de ces deux méthodes, il a été possible de …
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Strong Interactive Species in Metacommunities: The Interaction Between Dispersal and Daphnia magna in Zooplankton Communities
… on metacommunity diversity and assembly. I chose Daphnia magna as my strong interacting species due to its biological and physical traits. Dispersal is known to create predictable patterns of diversity as it increases in a metacommunity. We made logical predictions based off of my knowledge of …
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The Role of the Nuclear Receptor E75 in the Molt Cycle of Daphnia magna and Consequences of its Disruption.
North Carolina State University Theses Environmental and Molecular Toxicology.
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Predicción del valor de concentración letal media, LC50 y del nivel de toxicidad de compuestos orgánicos para Daphnia Magna usando algoritmos de aprendizaje automático supervisado
… la concentración letal media (CL50) aplicadas en Daphnia Magna son ampliamente utilizadas para determinar el nivel de toxicidad acuática de diferentes compuestos. Una alternativa a estos ensayos son los estudios de relación cuantitativa estructura-actividad (QSAR). Este trabajo propone la creación …
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Individual and Combined Effects of Selected Emerging Safeners: Mefenpyr di-ethyl and Cyprosulfamide and their Co-Herbicides, Fenoxaprop-P-ethyl and Isoxaflutole on Daphnia magna and Danio rerio
… of the SESs on non-target organisms such as Daphnia magna-a cladoceran invertebrate, and Zebrafish (D. rerio)- an aquatic vertebrate animal model. Specifically, the primary objectives of this study were to 1) evaluate and further expand our knowledge on the toxicity of selected safeners for …
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Hazard assessment of a mixture of pharmaceuticals detected in the upper Tennessee River of Daphnia magna and the determination of riverine zooplankton assemblage as it relates to chitobiase activity
… found in the Tennessee River using Daphnia- magna as a surrogate. Endpoints measured were time to first brood, reproduction, mortality, and number of neonates produced per adult reproduction day. Reproduction was the only endpoint that showed a significant effect. The LOEC of the …
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Toxicity of aliphatic amines on the embryos of zebrafish Danio rerio - experimental studies and QSAR
… such as the fathead minnow Pimephales promelas, Daphnia magna and Tetrahymena pyriformis showed that the toxicity of each species is a good predictor for each other.
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