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 445 for “"pesticide"”.
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Respiratory complications of organophosphorus pesticide poisoning
… globally every year, over a third are due to pesticide ingestion, the majority of which occur in rural Asia with organophosphorus (OP) compounds. These anticholinesterase pesticides cause an acute cholinergic syndrome characterised by decreased consciousness, excessive airway secretions and …
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Ethical pesticide policy : beyond risk assessment
This thesis sets out to develop a pesticide policy process that is ethical, one that fairly addresses the needs of society whilst at the same time minimizing the impact of pesticides on nature. The process that is developed here is context dependent: it is not a prescription for all public policy …
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Microbial Ecology: Spatial Aspects of Pesticide Degradation
The influence of discontinuous water films on bioavailability of xenobiotics to soil microorganisms was examined in the third study. Comparisons were made between two scenarios for distributing the xenobiotic relative to an inoculated degrader under a range of soil moisture conditions. Spatial …
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Multimethod Analysis of the Federal Pesticide Policy
Pesticides that have been tested as posing a risk to humans and$\\$or the environment have been banned for use in the United States. However, federal law allows exportation of these pesticides to countries for agricultural production. Consequently, these chemicals may return to the U.S. on imported …
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Pesticides and pesticide combinations on brain neurochemistry
Pesticides have been suggested to play a role in the development of many neurodegerative diseases including Parkinson's disease and Alzheimer's disease. Additionally, it has been suggested that exposure to pesticides and other environmental chemicals during the early stages of life could result in …
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Analysis of Policies Affecting Pesticide Use in Ecuador
… (NPR) were calculated to quantify the degree of pesticide subsidy in Ecuador from 1991 to 1996. Equilibrium exchange rates were computed first to determine the indirect and total NPR's in addition to the direct NPR's. The computed equilibrium exchange rates from 1987 to 1996 indicated a …
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Quantification of spray drift from aerial applications of pesticide
With widespread use of pesticides in modern agriculture, the impacts of spray drift have become a topic of considerable interest. The drifting of sprays is a highly complex process influenced by many factors. Advances in aerial application technology and in our ability to measure drift, coupled …
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U.S. apple market response to change in pesticide regulations
… imidacloprid, not being renewed for pesticide use in the United States. Supply and demand equations are designed to develop a model that projects apple bearing acreage, yield, imports, exports, residual supply, domestic use, and production to solve for market price. The model …
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The damaging potential of pesticide formulations on human skin
Percutaneous absorption is the major route of pesticide entry into the body. Impairment of skin barrier function may increase systemic exposure and toxicological risk. This project examines barrier function impairment of human skin in vitro due to commercial liquid formulations of the pesticides …
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Pesticide Interactions in the Laboratory Rice Paddy Model Ecosystem
Made available in DSpace on 2014-12-14T07:04:06Z (GMT). No. of bitstreams: 1 8004126.pdf: 5740672 bytes, checksum: ee6a1adba5d3a01b34611da297faa2bf (MD5) Previous issue date: 1979
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Simulation of pesticide availability and transfer into overland flow
… the availability and transfer of soil applied pesticides to runoff water on the soil surface were investigated. This research was composed of three major components: field investigation of pesticide transport as a function of pesticide formulation and application technique, development of PATS, …
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Biodegradation of pesticide and indolic compounds under methanogenic conditions
… inocula obtained from three different sites. Pesticides were monitored by high-performance liquid chromatography (HPLC) and the production of methane was measured with a gas chromatograph (GC). Dicamba was the most susceptible to degradation in the microcosms, followed by cyanazine. Atrazine …
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Organochlorine Pesticide Residue in Fish Fillets From Lake Springfield, Missouri
A method for extracting organochlorine pesticides from fish fillets using solid phase extraction techniques was developed. Fish fillets (10 and 20 g) were ground with 20 g of anydrous sodium sulfate. This mixture was then extracted with 100 mL of hexane, filtered and passed through a Chem Elut …
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Chlorinated Pesticide Levels in Knox County, Nebraska Farm Pond Fish
Chlorinated hydrocarbon pesticide levels were analyzed from blue gill (Lepomis Machrochirus) fillets. Hexane was used to extract the pesticide residues. A gas chromatograph equipped with an electron capture detector was employed for detection and quantitation of the pesticide residues. The results …
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Occupational Hazards Among Mosquito Control Operators And Other Pesticide Handlers
… stinging or biting insects, pathogen vectors), pesticides, physical demands of carrying/lifting heavy equipment, heat stress, and solar ultraviolet (UV) radiation. Mosquito control employees may take part in employer-provided training sessions and workshops focused on pesticide safety, …
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Environmental Risk Choices: An Empirical Analysis of EPA's Pesticide Rules
… targeted at the development of minor use pesticides.
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Pesticide Mixtures Induce Immunotoxicity: Potentiation of Apoptosis and Oxidative Stress
… the following concentrations were chosen for the pesticide mixture studies: 70μM lindane (Lind), 50μM malathion (Mal) and 55μM PBO. In the AlamarBlue cytotoxicity assay, individual pesticide and mixtures of malathion/PBO (MP) and malathion/lindane (ML) prompted cytotoxicity with varying …
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Immunotoxicity of Pesticide Mixtures and the Role of Oxidative Stress
The immunotoxic effects of multiple pesticide exposure were evaluated. C57BL/6 mouse thymocytes were exposed to lindane, malathion, and permethrin, either separately or in mixtures of two pesticides, in concentrations ranging from 37.5 uM to 1mM. These exposures caused both apoptotic and necrotic …
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