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.
Results
Showing 1 to 16 of 16 for “"environmental persistence"”.
-
Mechanisms and ecological implications of resistance to predation by heterotrophic ciliates expressed by marine bacteria
… bacteria and heterotrophic protists. The environmental persistence of marine bacteria can be attributed to multiple intra- and inter-specific strategies such as biofilm formation on biotic and abiotic surfaces, as well as interactions with other organisms, e.g. algae and heterotrophic …
-
EVALUATING METHODS OF CLEANING AND CLEANING VERIFCATION FOR THE REMOVAL OF ENVIRONMENTAL PATHOGENS IN FOOD PROCESSING PLANTS
Environmental harborage of the foodborne pathogens Listeria monocytogenes and Salmonella enterica in food processing facilities remains a challenging issue in the safe production of food. Once these pathogens enter a food processing environment they may persist for extended periods of time despite …
-
Part 1. A comparison of enantioselective uptake and degradation of chiral pesticides through biotic and abiotic processes in the aquatic environment; and Part 2. Development of a soybean oil based epoxy resin system and its application in composite material fabrication and Part 3. Development of an environmentally benign process for the recovery of scrap polystyrene.
… aquatic organisms and determine trends in their environmental persistence as a function of time."--Abstract, page iii. Part 2. "The current study investigates the development of effective epoxy resin systems using derivatives of soy oil"--Abstract, page iii. Part 3. "The process described here …
-
Dissipation of the herbicides endothall, diquat, and a 1:1 mixture in water, sediment, and Egeria densa
… macrophytes was evaluated to determine the environmental persistence of the combination and its components and phytotoxicity for egeria (Egeria densa). The tests were conducted in wooden pools illuminated with a 15 hr photoperiod with flourescent lights. Diquat was assayed by a …
-
Environmental Fate of Animal Manure-associated Antibiotics and Seed-coated Pesticide in Soils
There is growing concern over the environmental and human health impacts of chemical contaminants in agricultural systems. The environmental persistence of veterinary antibiotics applied to agricultural fields during manure fertilization could lead to increased antibiotic resistance. New …
-
Toxicity assessment of pesticides and biopesticides on wild and managed bees (Hymenoptera, Apoidea), and richness evaluation in mediterranean and tropical agroecosystems
… for wild and cultivated plants, being of crucial environmental and economic importance. Their global decline, driven by anthropogenic factors, including the use of synthetic pesticides, is an alarming concern. Biopesticides can be a viable alternative for the protection of cultivated plants due to …
-
Connecting consumer plastic formulations to marine fates and impacts
… impeded by knowledge gaps surrounding plastic’s environmental persistence and implications. To fill some of these gaps, this thesis aims to connect consumer plastic formulations (the specific mixture of polymers and additives) to marine fates and impacts. First, I explored relationships between …
-
Developing novel natural and synthetic tools for a more sustainable management of Euschistus heros (Hemiptera: Pentatomidae)
… should focus on improving formulations, reducing environmental persistence, and evaluating field-scale efficacy to enhance sustainable pest management. Keywords: sustainable pest control; non-target organisms; selective toxicity; soybean insect management.
-
Connecting Consumer Plastic Formulations to Marine Fates and Impacts
… impeded by knowledge gaps surrounding plastic’s environmental persistence and implications. To fill some of these gaps, this thesis aims to connect consumer plastic formulations (the specific mixture of polymers and additives) to marine fates and impacts. First, I explored relationships between …
-
p,p' DDE Regulated Gene Expression and Possible Mechanisms of Action in Breast Tumor
… to increase breast cancer risk due to its environmental persistence, levels of bioaccumulation in breast adipose tissue, and endocrine disrupting actions. Epidemiological studies have had inconsistent findings, however a study in MMTV-neu mice determined that localized, developmental …
-
Caracals as sentinels for metal exposure in a human-transformed landscape
… into the environment. Due to their toxicity, environmental persistence and bioaccumulative nature, these chemical pollutants threaten wildlife and human health. As urbanisation increases and top predators are forced to utilise more urban spaces, they will likely be exposed to more toxic heavy …
-
The Functional Characterization of the LysR-Type Transcriptional Regulator QseD and the SorC-Type Transcriptional Regulator LsrR in Enterohemorrhagic Escherichia coli
… systems QseBC and QseEF, and abiotic environmental cues, such as phosphate and sulfate levels through QseEF [1-2]. Additionally, quorum sensing (QS) signaling cascades have evolved to sense microbial population density and diversity through the recognition of bacterially produced …
-
Regulation of to xin Synthesis By Clostridium Difficile
… resistance, spore-forming ability, and environmental persistence. The incidence of <em>C. difficile</em> infection (CDI) has been increasing exponentially in the last decade. Virulent strains of <em>C. difficile</em> produce either toxin A and/or toxin B, which are essential for the …
-
Understanding the fate of active pharmaceutical compounds in waters receiving poorly or untreated wastewater for the development of a dedicated environmental risk assessment approach
… ingredients (APIs) is of a growing environmental concern. The inherently biological activity of APIs creates a concern of potential ecotoxicological effects even at very low concentrations. Such risk is particularly exacerbated in low and low-middle income countries (LLMICs) where it …
-
Removal of Perfluorooctane Sulfonate (PFOS) and Related Compounds From Industrial Effluents
… of increasing public concern due to their environmental persistence, toxicity, and bioaccumulation. These perfluorinated compounds have been used for more than half a century in a wide variety of industrial and consumer products ranging from stain repellents such as Teflon® to aqueous …
-
EPIDEMIOLOGY AND DISTRIBUTION OF PARASITES OF ANIMAL - SPECIFIC AND ZOONOTIC IMPORTANCE IN PIG FARMS IN NORTHERN ITALY.
… from the host and reducing their survival and persistence in the environment. Given the growing concern about the anthelmintic resistance, an effective approach requires an integrated strategy that combines pharmacological interventions with optimized management practices. The review of the …