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 46 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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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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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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Posouzení vlivů běžně používaných hasiv na vybrané složky životního prostředí
… na organismech akvatického prostředí - perloočka Daphnia magna a zelená řasa Scenedesmus subspicatus a organismech terestrického prostředí - chvostoskok Folsomia candida, vyšší rostlina salát setý Lactuca sativa a žížala hnojní Eisenia fetida. Pro ověření platnosti výsledků byly provedeny …
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Prymnesium parvum effects on green algae, cladocerans and fish in field and laboratory studies.
… subcapitata and a model cladoceran predator, Daphnia magna. Prymnesium parvum reduced D. magna survival and reproduction in laboratory and field studies, providing the first evidence of P. parvum impacts on cladocera. Nutrient treatment of N:P = 20 in the field decreased aquatic toxicity of P. …
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Techniques for Evaluating Power Plant Discharges Using In-Situ Breakdown and Flow Though Laboratory Sediment Bioassays
… test organisms including Chironomus tentans, Daphnia magna and Hyalella azteca for survival and growth endpoints in 10-day exposures. Survival and growth effects for Corbicula juveniles were seen at 25 ppb copper in the sediment.
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Multispecies toxicity tests using indigenous organisms: predicting the effects of hazardous materials in streams
… to responses observed in acute tests with Daphnia magna, Ceriodaphnia dubia and Pimephales promelas and chronic survival and reproductive tests with C. dubia The predictive utility of these various tests was then evaluated against observed effects in the receiving stream. The …
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Evaluation of Novel Carbamate Insecticides for Neurotoxicity to Non-Target Species
… concentration. Further in vivo bioassay using Daphnia magna was conducted to compare the aquatic toxicity of commercial and novel carbamates. The data showed that except for PRC331 (3-tert-butylphenylmethylcarbamate), all novel carbamates were of similar potency as bendiocarb (LC50 = 611 nM) …
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Light Enhanced Toxic/tumorigenic Potential of Trinitrotoluene (Tnt) and Analogs
… Photobacterium phosphoreum (Microtox reagent), Daphnia magna (daphnia), and Dugesia dorotocephala (planaria) was enhanced by near-ultraviolet light (nUV) coexposure. The light enhanced toxicity of TNT, 2A and 4A must be considered to fully evaluate the environmental hazards of these compounds. …
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Approaches for assessing toxicity of selected contaminants to freshwater mussels (Bivalvia: Unionidae)
… used to assess environmental risk (i.e.Ceridaphnia dubia, Daphnia magna, Pimephales promelas), whereas they were far more tolerant to TRC than many species. Twenty-one day chronic test endpoints for juveniles were substantially lower than those calculated during acute bioassays with …
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