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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 65 for “"Polycyclic aromatic hydrocarbon"”.
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Revisiting polycyclic aromatic hydrocarbon emission in Photodissociation regions
… molecules made of carbon and hydrogen known as polycyclic aromatic hydrocarbons (PAHs). These molecules account for ~15% of the cosmic carbon and ~20% of the total IR power of the Milky Way and star-forming galaxies. They are strong absorbers of ultraviolet (UV) photons and release the absorbed …
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Dietary Influences on Polycyclic Aromatic Hydrocarbon Metabolism and Carcinogenesis
Made available in DSpace on 2015-05-13T15:26:58Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7913412.PDF: 6860257 bytes, checksum: f4ebce04061d1ca88e5e4b73e6c41ef8 (MD5) Previous issue date: 1978
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Predictive modeling of polycyclic aromatic hydrocarbon formation during pyrolysis
Polycyclic aromatic hydrocarbons (PAHs), large molecules comprised of multiple aromatic rings like anthracene or pyrene, are a notable intermediate and byproduct in combustion or pyrolysis of hydrocarbon fuels. On their own, they have been shown to pose a significant health risk, with certain PAHs …
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Polycyclic aromatic hydrocarbon production in a jet stirred combustor
Thesis (Sc.D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1983.
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Low-Energy Electron Impact Fragmentations of the Polycyclic Aromatic Hydrocarbon Anthracene
The aim of the study undertaken for this Masters of Science thesis was to investigate the fragmentation processes induced by low-energy electron impact with anthracene. This research is relevant in the study of low-energy electron interactions with molecules in gaseous environments, including …
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Polycyclic Aromatic Hydrocarbon (PAH)-Based Conjugated Macrocycles and Polymers For Electronic Applications
… high tendency to form π-stacked ordered phases, polycyclic aromatic hydrocarbons (PAHs) are attractive building blocks for the assembly of conjugated systems for electronic applications. The body of this dissertation focuses on the synthesis, structure-property and device studies of PAH-based …
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Advancing Polycyclic Aromatic Hydrocarbon Bioremediation using Genetic Bioaugmentation in Soil Microbial Communities
Polycyclic aromatic hydrocarbons (PAHs) are introduced into the environment through forest fires, fossil fuel combustion, and crude oil spills, posing significant health and ecological risks. These compounds are carcinogenic and disrupt soil microbial processes essential for ecosystem functions. …
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Polycyclic aromatic hydrocarbon sorption kinetics in three iron oxide-coated aquifer sands
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1995.
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ASSESSMENT OF POLYCYCLIC AROMATIC HYDROCARBON BIOAVAILABILITY FROM SOIL USING THE JUVENILE SWINE MODEL
Polycyclic aromatic hydrocarbons (PAHs) are common soil contaminants due to their lipophilic nature which limits partitioning to water or air. Soil properties such as organic carbon can affect PAH release from soil, and thus affect PAH bioavailability of ingested soil. Risk assessment of PAHs in …
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Synthetic and Computational Studies on Polycyclic Aromatic Hydrocarbon Derivatives, Nucleoside Analogs and Peptides
… and computational modeling studies performed. Polycyclic aromatic hydrocarbons (PAHs) and β-peptides are among synthetic organic compounds known to interact with natural biological macromolecules. This interaction may affect the specific biological functions of the biomacromolecules. A variety …
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Experiment and Modeling Combined Kinetic Study of Bottom-up Polycyclic Aromatic Hydrocarbon Formations
… their importance, the chemical mechanisms of polycyclic aromatic hydrocarbon (PAH) formation are not well understood. Therefore, a combined theoretical and experimental study of the chemical kinetics PAH formation is essential to deepen our understanding to draw a complete picture of aromatic …
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Assessing Regional Sources of Atmospheric Polycyclic Aromatic Hydrocarbon Pollution and Associated Human Cancer Risk
… of atmospheric pollutants, toxic, carcinogenic polycyclic aromatic hydrocarbons (PAHs), are globally ubiquitous chemicals of interest to domestic and international policy decision-makers. Previous studies of PAHs use a single carcinogenic PAH, benzo[a]pyrene, to perform policy-relevant analyses …
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Assessment of exposure and effects associated with polycyclic aromatic hydrocarbon contamination in south Chattanooga, Tennessee
… and soil of the surrounding floodplains. Many polycyclic aromatic hydrocarbons (PAHs) are found in these areas, specifically the 16 PAHs the EPA and ATSDR consider to be priority pollutants. The close proximity of residents to contaminated sites in southern Chattanooga initiated an assessment …
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Polycyclic Aromatic Hydrocarbon determination in liver of Menhaden exposed to the Deep Water Horizon Oil Spill
… in the Gulf of Mexico. Crude oil contains polycyclic aromatic hydrocarbon (PAHs) and oil spills increase the exposure of aquatic organisms to this class of chemicals. The overall detrimental health effects associated with PAH exposure depend on the exposure period, the concentration of …
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A method for using polyethylene passive samplers to measure polycyclic aromatic hydrocarbon chemical activity in sediments
In order to aid in the determination of the hazards posed by hydrophobic organic compounds (HOCs) in sediment beds, a method for the use of polyethylene (PE) sheets as passive sampling devices for measuring chemical activities was explored. A model which depends on a concentration gradient and two …
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Ambient Polycyclic Aromatic Hydrocarbon Exposure and Breast Cancer Risk in a Population-Based Canadian Case-Control Study
Background: Polycyclic aromatic hydrocarbons (PAHs) represent a class of ubiquitous pollutants which are emitted through combustion of organic materials and are recognized as established human carcinogens and endocrine-disrupting chemicals. There is a lack of epidemiological research investigating …
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Petrogenic Polycyclic Aromatic Hydrocarbon Levels and Health of Gulf Coast Communities Following the Deepwater Horizon Oil Spill
… barrels of crude oil, containing petrogenic polycyclic aromatic hydrocarbons (PAHs), into the Gulf of Mexico. Few studies have described the effects that the Deepwater Horizon oil spill has had on human health. Utilizing an ongoing longitudinal cohort study we set out to investigate the …
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Understanding polycyclic aromatic hydrocarbon degradation by soil microbial communites: the concentration and distribution of aromatic dioxygenase genes
… The following thesis therefore compares two aromatic dioxygenase genes, nidA and nahAc, which confer the ability for the bacteria carrying the genes to metabolize polycyclic aromatic hydrocarbons (PAHs), persistent pollutant byproducts of coal coking. The deposition of PAHs influences the …
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