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 57 for “"toxic chemicals"”.
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Molecules and materials for the optical detection of explosives and toxic chemicals
… detection of both explosives and highly toxic chemicals, including chemical warfare agents. There are varieties of analyte targets, however, that remain challenging for detection by these methods. Research towards improving this technology has obvious implications for homeland security …
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MEMS-based resonant sensor arrays : selective detection of volatile and toxic chemicals
With growing concerns about homeland security, public health, and environmental cleanliness, there is a strong need today for robust chemical sensing systems that are portable in addition to being highly sensitive. While there are many options available for gaseous chemical detection and …
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Environment risk assessment for toxic chemicals and genetically-engineered microorganisms: a microcosm approach
… genetically-engineered microorganisms (GEMs) and toxic chemicals. Approaches used to evaluate the potential environmental impact of these two stressors are fundamentally different, and arise mainly from the fact that the GEMs are living and capable of replication. Risk assessment for …
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Elucidating the Response of Activated Sludge Cultures to Toxic Chemicals at the Process, Floc and Metabolic Scales
… in these systems can be severely affected by toxic chemicals present in the influent wastewater. The effects of chemical toxins at the treatment process level are determined by the mechanisms that occur at the biofloc and cellular levels, which can be physical, chemical and physiological in …
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The Chemistry of Metal Oxyhydroxides and their 3D Porous Hybrid Materials for the Capture, Transport and Degradation of Toxic Chemicals
Growing concerns regarding chemical weapons and toxic chemicals require the development and testing of robust materials and methods to capture and destroy these harmful chemicals. This dissertation discusses the fundamental properties (e.g., structure, stability and activity) of metal oxyhydroxide …
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Examining women’s knowledge, health risk perceptions, beliefs and behaviours in relation to toxic chemicals commonly found in personal care and household products: a mixed-methods approach
… care and household products (PCHP) contain toxic chemicals harmful to health. For instance, parabens, commonly found in shampoos, are endocrine disruptors that increase the risk of hormonal and reproductive disorders among women. Despite safer alternatives, research suggests women are …
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Treatment of inhibitory wastewaters using expanded-bed anaerobic GAC reactors
… to effectively treat wastewaters which contain toxic chemicals that resist biodegradation and inhibit the utilization of the biodegradable constituents of the wastewater.
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Evaluation of the Development and Effectiveness of Copper Total Maximum Daily Loads (Tmdls) to Achieve Marine Water Quality Criteria
<p>Elevated concentrations of certain chemicals in surface water are known to be toxic to aquatic organisms (e.g., barnacles, algae, and fish). For a number of these chemicals (e.g., tributyltin [TBT], copper) federal and state water quality standards exist to protect aquatic organisms. As a means …
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Structural mechanism for multidrug efflux systems
… have developed various mechanisms to overcome toxic environments that are otherwise unfavorable for their survival. One important strategy that bacteria use to expel toxic compounds, including heavy metal ions, is the expression of membrane efflux transporters that recognize and actively export …
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Evaluating the Source-Effect Relationship of Industrial Toxins in Wastewater Treatment
Upset events due to the inflow of toxic chemicals are a critical issue for wastewater treatment facilities. Understanding the source-effect relationship of toxic chemicals can facilitate the prevention or improved reaction to upset events. Part one of this study was conducted to investigate the …
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Synthesis of pinane thromboxane A₂ via suzuki-miyaura coupling
… steps within the synthesis and the use of less-toxic chemicals. Accomplishing the Suzuki-Miyaura coupling has proven to be the greatest challenge and will be described in detail (Scheme).</p>
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The Examination of the Link Between Pesticides in Food and Learnig Disorders in Children
… Young children ingesting foods contaminated by toxic chemicals are more susceptible to cellular damage such as nerve damage, cancers, and liver damage than adults.</p>
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Engineering Biocatalytic And Living Materials
… human activity contaminates waters with toxic chemicals, making it unsafe for consumption. Bioremediation utilizing encapsulated bacteria has emerged as an efficient method for the removal of toxic chemicals from the environment, and can permanently remove a wide range of pollutants by …
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From a Public Health Perspective: Fracking and Other Unconventional Oil and Gas Extraction Techniques in California
… the need for a cleaner environment, free of toxic chemicals, the Center for Environmental Health (CEH) establish a Healthy Energy Choice campaign. CEH and the Healthy Energy Choice Program collaborate with other organizations and communities to shine light on the public health impacts …
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End Use Packaging: A Survey of Customer Perception of Recycling and Environmental Impact of Packaging Materials
… food packaging for the fast food industry leach toxic chemicals into the food products. Some of these toxins are known endocrine disruptors, which results in reproductive issues as well as hormone imbalances. Alternatives to traditional food packaging have been addressed with special attention to …
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Synergistic effects of mixtures of the kresoxim-methyl fungicide and medicinal plants extracts in vitro and in vivo against Botrytis Cinerea
… health problems associated with the build up of toxic chemicals, (particularly in food products), have resulted in pressure to reduce the use of chemical pesticide volumes as well as its residues. An emerging alternative to random synthesis is the study and exploitation of naturally occurring …
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Synergistic effects of mixtures of the kresoxim-methyl fungicide and medicinal plants extracts in vitro and in vivo against Botrytis Cinerea
… health problems associated with the build up of toxic chemicals, (particularly in food products), have resulted in pressure to reduce the use of chemical pesticide volumes as well as its residues. An emerging alternative to random synthesis is the study and exploitation of naturally occurring …
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Design, Synthesis and Characterization of Heme-proteins: Developing Potential Catalysts for Bio-remediation
The next generation of toxic chemicals and hazardous wastes from sophisticated chemical industries will demand the environmental agencies to employ biological methods over the conventional physical and chemical remediation methods. Over the past decade, natural metallo-enzymes have been identified …
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Contamination Running Deep: Oral Histories of Environmental Racism, Injustice, and Outrage of One Family in a Southern African-American Community
… the family has learned that they were exposed to toxic chemicals. After a highly publicized flood in October 1990, the residents of Hyde Park were devastated when they found that the toxic chemicals had contaminated the soil and water. My father Ernest Jordan was the first to sue the industrial …
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