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Articles 1 - 30 of 34
Full-Text Articles in Pharmacology, Toxicology and Environmental Health
Pharmaceuticals And Personal Care Products In Pacific Northwest Coastal Ecosystems: Spatial Variation, Organism Effects, And Consumer Perspectives, Amy Lynne Ehrhart
Pharmaceuticals And Personal Care Products In Pacific Northwest Coastal Ecosystems: Spatial Variation, Organism Effects, And Consumer Perspectives, Amy Lynne Ehrhart
Dissertations and Theses
Anthropogenic pollution poses a threat to marine organisms and ecosystems worldwide. Common chemical pollutants that enter the marine environment include legacy contaminants, which are well known and heavily regulated or banned pollutants, and emerging contaminants, which are more recently recognized as pollutants and often lack regulatory limits for their use and discharge. Wastewater treatment plant (WWTP) effluent is a major source of various contaminants of concern, particularly pharmaceutical and personal care products (PPCPs) that are not fully removed during treatment. PPCPs exist at low concentrations in the environment and may have unknown and subtle effects on marine life. Data gaps …
Eelgrass (Zostera Marina) Population Decline In Morro Bay, Ca: A Meta-Analysis Of Herbicide Application In San Luis Obispo County And Morro Bay Watershed, Tyler King Sinnott
Eelgrass (Zostera Marina) Population Decline In Morro Bay, Ca: A Meta-Analysis Of Herbicide Application In San Luis Obispo County And Morro Bay Watershed, Tyler King Sinnott
Master's Theses
The endemic eelgrass (Zostera marina) community of Morro Bay Estuary, located on the central coast of California, has experienced an estimated decline of 95% in occupied area (reduction of 344 acres to 20 acres) from 2008 to 2017 for reasons that are not yet definitively clear. One possible driver of degradation that has yet to be investigated is the role of herbicides from agricultural fields in the watershed that feeds into the estuary. Thus, the primary research goal of this project was to better understand temporal and spatial trends of herbicide use within the context of San Luis …
Chemically Induced Phytoextraction Of Lead (Pb) Contaminated Soil By Switchgrass (Panicum Virgatum L.), Austin Gilly
Chemically Induced Phytoextraction Of Lead (Pb) Contaminated Soil By Switchgrass (Panicum Virgatum L.), Austin Gilly
Master of Science in Integrative Biology Theses
Soils contaminated with lead (Pb) from human activities including industrial byproducts create an environmental and human health risk. Phytoextraction through chemical acquisition of Pb in soils offer a potentially cost effective and ecologically driven approach to remediation. Switchgrass (Panicum virgatum L.) is known to have a tolerance for a wide range of heavy metals including Pb. Switchgrass is also able to grow in a wide range of climates. Soil chemistry manipulation, using chelates and plant growth promoters could provide an effective field method for phytoremediation using switchgrass. In this study chemically enhanced phytoextraction using the soil-fungicide Infuse (active ingredient …
A National Approach To Address The Impact Of Land-Based Pollution On Marine Environment In Liberia, Kansualism Berk Kansuah
A National Approach To Address The Impact Of Land-Based Pollution On Marine Environment In Liberia, Kansualism Berk Kansuah
World Maritime University Dissertations
No abstract provided.
Can Viruses Cause Lupus?, Stephen I. Reeder
Can Viruses Cause Lupus?, Stephen I. Reeder
Selected Honors Theses
Like so many autoimmune diseases, the exact cause of systemic lupus erythematosus (SLE) remains unknown. Evidence points to both genetics and environment playing roles in the onset of the disease, but neither acts independent of the other. Genetics are the easier of the two to study with recent advances in the field making it easier to isolate genes shared by individuals with the disease. However, genetic studies reveal that there is almost certainly an environmental component to the development of SLE. The underlying pathology and existing research on environmental contributors to the development of SLE suggest that viruses could potentially …
Identifying Seasonal And Daily Variations In Arg-Containing Bioaerosols Generated During The Wastewater Treatment Process, Mirza Isanovic
Identifying Seasonal And Daily Variations In Arg-Containing Bioaerosols Generated During The Wastewater Treatment Process, Mirza Isanovic
Theses and Dissertations
Antibiotic resistance is a growing problem with the current global death count topping 700,000. In the United States alone there are 2.8 million antibiotic resistant bacterial (ARB) infections each year and approximately 35,000 deaths. If current trends continue the global ARB death count will reach 10 million surpassing current chronic disease deaths. Wastewater treatment plants play a vital role in protecting both the environment as well as local communities. The WWTP process allows for the removal of chemicals and contaminants from water that eventually makes its way back into the environment as well as into drinking water plants. Despite the …
The Effects Of Radical Containing Combustion Derived Particulate Matter In Adult Mouse Respiratory System, Jeffrey Harding
The Effects Of Radical Containing Combustion Derived Particulate Matter In Adult Mouse Respiratory System, Jeffrey Harding
LSU Doctoral Dissertations
Epidemiological data associates high levels of combustion-derived particulate matter (PM) with deleterious respiratory outcomes, but the mechanism underlying those outcomes remains elusive. It has been acknowledged by the World Health Organization that PM exposure contributes to more than 4.2 million all-cause mortalities worldwide each year. Current literature demonstrates that PM exacerbates respiratory diseases, impairs lung function, results in chronic respiratory illnesses, and is associated with increased mortality. The proposed mechanisms revolve around oxidative stress and inflammation promoting pulmonary physiological remodeling. Our data demonstrate that environmentally persistent free radicals (EPFRs) stabilized on the surface of PM are capable of inducing oxidative …
Determinants Of The Carbon Footprint Of German Swimmers 2020., Ann-Marie Muehlbauer
Determinants Of The Carbon Footprint Of German Swimmers 2020., Ann-Marie Muehlbauer
Master's Theses
The current climate situation is placing our planet and future generations at risk, which demonstrates the urgency to combat climate change and conduct research to support this effort. Calculating the carbon footprint of active sport participation represents an important opportunity to conduct additional research. This study examined the environmental attitudes and practices of swim club members in Germany. The study had three goals: First, to calculate the total and partial carbon footprint of German swimmers; second, to understand how sport organizations induce participants to engage in pro-environmental behavior; and third, to analyze various factors associated with carbon footprint, such as …
Prevalence Of Anticoagulant Rodenticides In Ferruginous Hawk Nestlings And Evaluation Of A Novel Method To Rapidly Assess Exposure, Ariana Joyce Dickson
Prevalence Of Anticoagulant Rodenticides In Ferruginous Hawk Nestlings And Evaluation Of A Novel Method To Rapidly Assess Exposure, Ariana Joyce Dickson
Boise State University Theses and Dissertations
Anticoagulant rodenticides (ARs) are compounds commonly used to control rodent pests by inhibiting an enzyme critical for synthesis of clotting factors in their blood. Secondary and tertiary poisoning of non-target species frequently occur, especially of predators that consume rodents, including many species of raptors. Although raptor exposure to ARs has been documented on at least three continents, patterns, pathways and the sub-lethal effects of exposure are not well studied. This has created a substantial need to monitor the effects of ARs in free-living populations. I evaluated the prevalence of secondary, non-target exposure to anticoagulant rodenticides experienced by a predatory raptor, …
Mechanistic Insight On Vibrio Gazogenes Mediated Intervention Of Aflatoxin Biosynthesis In Aspergillus Flavus, Rubaiya Jesmin
Mechanistic Insight On Vibrio Gazogenes Mediated Intervention Of Aflatoxin Biosynthesis In Aspergillus Flavus, Rubaiya Jesmin
Theses and Dissertations
Aflatoxin is a liver carcinogen, mycotoxin, and a secondary metabolite that is produced by some plant pathogens within the genus Aspergillus when they infect crops such as corn, peanuts, and cotton. Given the significant adverse health and economic impacts of aflatoxin and a predicted rise of crop contamination with mycotoxins caused by a changing climate, there is a pressing need for exploring new aflatoxin mitigation methods. Previous studies in our laboratory have shown that metabolites from Vibrio gazogenes, an estuarine non-pathogenic bacterium, can inhibit aflatoxin synthesis. However, a direct interaction study between V. gazogenes and aflatoxin producing strains has …
Using A 3d In Vitro Ovarian Tissue Culture Model To Screen For The Female Reproductive Toxicity Of Pharmaceutical Compounds, Jingshan Xu
Theses and Dissertations
Ovarian toxicity (ovotoxicity) is one of the major side effects of pharmaceutical compounds for women at or before reproductive age. The current gold standard for screening of compounds for ovotoxicity largely relies on preclinical investigations using whole animals. However, in vivo models are time-consuming, costly, and harmful to animals. Here, we developed a three-tiered ovotoxicity screening approach starting from encapsulated in vitro follicle growth (eIVFG) and screened for the potential ovotoxicity of 8 preclinical compounds from AstraZeneca (AZ). Results from Tier 1 and 2 screenings using eIVFG showed that the first 7 tested AZ compounds, AZ-A, -B, -C, -D, -E, …
Temporal Differences In The Emission And Atmospheric Dispersion Of Particulate Matter From Waste And Drinking Water Treatment Facilities, Abdulmalik Alsaif
Temporal Differences In The Emission And Atmospheric Dispersion Of Particulate Matter From Waste And Drinking Water Treatment Facilities, Abdulmalik Alsaif
Theses and Dissertations
Many countries encounter a growing shortage of water, and the reuse of treated or untreated wastewater is their main source. Wastewater Treatment Plants (WWTPs) are mainly designed to remove organic nutrients, large solids, and chemical substances. There are some possible issues regarding WWTPs that are close to residential areas around the world. One of the environmental effects from WWTP that might cause air pollution would be the emission of toxic chemical gases and microorganisms via aerosols that transport bacteria as well as viruses and fungal spores which can be harmful to human health. Therefore, particulate matters (PM) and metrological parameters …
Nanocarbon Modification Of Membranes For Enhanced Water Desalination And Water Treatment, Worawit Intrchom
Nanocarbon Modification Of Membranes For Enhanced Water Desalination And Water Treatment, Worawit Intrchom
Dissertations
Water scarcity is foreseen to be one of the great global issues in the coming decades. The challenges are not only in providing water supply to cope with the growing public demand, but recovering clean water to natural resources. Clean water supply, from brackish and seawater is attractive. Membrane distillation (MD) is an emerging thermal membrane-based process that has been used for desalination and other pollutant separations from water. MD can be operated at low temperature, so low-grade energy sources are a good alternative heat source for MD. High salt rejection and low membrane fouling also make MD interesting for …
Does Circularizing Source-Separated Food Waste Present A Risk To Our Food?, Astha Thakali
Does Circularizing Source-Separated Food Waste Present A Risk To Our Food?, Astha Thakali
Electronic Theses and Dissertations
About a third of the food produced annually is wasted. Food waste recycling can be a way to close the loop and attain a more sustainable food system, however, the system must be carefully monitored and managed to avoid the introduction and build-up of contaminants. To study the potential presence of contaminants in food waste, source-separated food waste was collected and screened for five classes of contaminants (physical contaminants, heavy metals, halogenated organic contaminants, pathogens, and antibiotic resistance genes) from two separate regulatory environments (voluntary vs mandated food separation). The regulatory environment did not affect the level of contamination, except …
Per- And Polyfluoroalkyl Substances In Consumable Fish & Surface Waters Near Sites Using Aqueous Film-Forming Foams: Potential Risks, Suggested Regulatory Standards And Policy Approaches For Massachusetts, Tachalla Gibeau
International Development, Community and Environment (IDCE)
Per- and polyfluoroalkyl substances (PFAS) are emerging contaminants of concern with potential for adverse effects on both human and environmental health. Hence, long-chain PFAS compounds used in legacy aqueous film-forming foams (AFFFs) are being phased out, resulting in the stockpiling of them at various commercial installations. PFAS contaminated runoff from these facilities has the potential to contaminate nearby surface water bodies and the fish inhabiting them. An analytical approach was used to identify surface water bodies in Massachusetts that are habitats for fish susceptible to PFAS contamination and where said fish are also popularly consumed by locals – thereby representing …
Volatile Organic Compound Exposure And Cardiometabolic Syndrome Risk In A Nationally Representative Cohort., Stacey Lane Konkle
Volatile Organic Compound Exposure And Cardiometabolic Syndrome Risk In A Nationally Representative Cohort., Stacey Lane Konkle
Electronic Theses and Dissertations
BACKGROUND: The relative importance of environmental exposures such as volatile organic compounds (VOCs) is one of the paramount public health priorities of our time, yet is presently unstudied. VOCs are ubiquitous in the environment and have been associated with numerous adverse health effects, including a number of cardiovascular and metabolic effects that are components of Cardiometabolic Syndrome (CMS). OBJECTIVES: To examine the relationship between CMS and individual-level exposures to VOCs, measured as urinary metabolites of VOCs (UM-VOCs), in a nationally representative sample. METHODS: Associations between urinary biomarkers of exposure to 19 parent VOCs and CMS were assessed using the National …
The Relationship Between Tree Canopy And Social Capital On Physical Activity In Unlv Students, Melissa Bartshe
The Relationship Between Tree Canopy And Social Capital On Physical Activity In Unlv Students, Melissa Bartshe
UNLV Theses, Dissertations, Professional Papers, and Capstones
Despite the numerous health benefits, rates of physical activity are low, especially among the college student population. Neighborhood tree canopy is one aspect of the built environment that has been shown to positively impact physical activity. Social capital has also been correlated with higher rates of physical activity. The sprawling urban design and arid desert climate of Las Vegas pose unique challenges to both tree canopy and social capital. Additionally, the relationship between tree canopy, social capital, and physical activity is understudied in the college student population. The purpose of this study was to assess the relationship of tree canopy …
Tobacco Product-Derived Aldehydes: Effects On Circulating Angiogenic Cells & Implications For Cardiovascular Disease., Jordan B. Lynch
Tobacco Product-Derived Aldehydes: Effects On Circulating Angiogenic Cells & Implications For Cardiovascular Disease., Jordan B. Lynch
Electronic Theses and Dissertations
Cardiovascular disease (CVD) is the leading cause of death worldwide. Tobacco smoke is the most significant modifiable risk factor in CVD development and contains numerous toxic compounds, including aldehydes, which have been linked to CVD. Formaldehyde, acetaldehyde, acrolein, and crotonaldehyde have been identified as significant contributors to cigarette-induced health effects, but the mechanism of these effects is not well understood. These aldehydes are also found in aerosols produced by e-cigarettes (e-cigs). The goal of this dissertation was to explore the systemic, hematological, and endothelium-related effects of exposure to tobacco products and constituent aldehydes and to identify potential mechanisms of injury. …
Understanding The Toxicity Of Single Hydrocarbons, Oil, And Dispersed Oil: A Species Sensitivity Assessment For Five Atlantic Coral Species, Nicholas R. Turner
Understanding The Toxicity Of Single Hydrocarbons, Oil, And Dispersed Oil: A Species Sensitivity Assessment For Five Atlantic Coral Species, Nicholas R. Turner
HCNSO Student Theses and Dissertations
Coral reefs are keystone coastal ecosystems that are at risk of exposure to petroleum hydrocarbons from a range of sources, including oil spill incidents and chronic runoff, and are usually one of the highest valued natural resources for protection in Net Environmental Benefit Analysis (NEBA)/Spill Impact Mitigation Assessment (SIMA) of response methods and environmental damage. Previous research evaluating hydrocarbon impacts to corals has resulted in no clear characterization of sensitivity, as work has generally focused on higher-level effects, compounded by significant variability in experimental methodology. This represents an important knowledge gap in oil spill preparedness and response as it relates …
Computational Tools For Analyzing Correlations Between Microbial Biological Diversity And Ecosystems, Behzad Torkian
Computational Tools For Analyzing Correlations Between Microbial Biological Diversity And Ecosystems, Behzad Torkian
Theses and Dissertations
Metagenomics has developed into a reliable mechanism to analyze microbial diversity of microbial communities in the recent years. Through the use of next-generation sequencing, metagenomic studies can generate billions of short sequencing reads that are processed by computational tools. However, with the rapid adoption of metagenomics, a large amount of data has been produced. This high level of data production requires the development of computational tools and pipelines to manage data scalability and performance. In this thesis, we developed several tools that will aid in the exploration of the large amount of DNA sequence data, and we further developed a …
Bacterial Water Quality Monitoring As Citizen Science In Congaree National Park, South Carolina, Shea Mccarthy
Bacterial Water Quality Monitoring As Citizen Science In Congaree National Park, South Carolina, Shea Mccarthy
Theses and Dissertations
Congaree National Park aims to preserve its natural and cultural resources while protecting these benefits for current and future enjoyment. Hydrologic features make up a large portion of the park and attract visitor recreation. There are several known sources of pollution that enter these waterways, mainly from upstream sources of waste discharge. The national park and its surrounding areas hold great ecological significance, however, there are many threats to the surface water quality in this area. Water quality degradation can impact the ecosystem, wildlife, and visitor experience. This project specifically considers exposure to fecal contamination in surface waters from upstream …
The Use Of Polymer-Coated Magnetic Nanoparticles For Amelioration Oil Toxicity And Enhancement Microbial Remediation, Amjed Alabresm
The Use Of Polymer-Coated Magnetic Nanoparticles For Amelioration Oil Toxicity And Enhancement Microbial Remediation, Amjed Alabresm
Theses and Dissertations
Oil spills from different sources such as natural seeps, waste waters, runoffs and accidental oil spills can have serious effects on the environment while also resulting in potentially major economic damage. Due to the harmful effects of crude oil components on ecosystems, a rapid response to sequestrate oil is required to minimize any resulting environmental impact. Currently used oil removal methods, in addition to their advantages, also have severe limitations. New techniques have been developed including nanotechnology to address these limitations. A new type of nanoparticle (NP), composed of polyvinylpyrrolidone (PVP) coated iron oxide (magnetite), has been successfully used to …
Microbiome Targeted Therapies In Gulf War Illness, Diana Agnes Kimono
Microbiome Targeted Therapies In Gulf War Illness, Diana Agnes Kimono
Theses and Dissertations
Gulf war illness (GWI) is a chronic multisymptomatic disorder affecting about 30% of veterans of the 1990-1991 Persian Gulf war. Affected veterans complain of chronic symptoms which begun during or shortly after the war and persist 30 years later. This dissertation is a report of three studies which use a murine model to investigate the microbiome as a therapeutic target in GWI. Mice were exposed to pesticides and the prophylactic drug pyridostigmine bromide (PB) and studied these chemical’s impact on the microbiome in both an acute and persistence model of GWI.
The first study looks at the effect of altered …
Development, Validation, And Application Of A Novel Method To Separate And Quantify Silver Intracellular Uptake In Pseudomonas Aeruginosa, Mohammed A. Othman
Development, Validation, And Application Of A Novel Method To Separate And Quantify Silver Intracellular Uptake In Pseudomonas Aeruginosa, Mohammed A. Othman
Theses and Dissertations
Silver nanoparticles (AgNPs) have attracted tremendous attention as a potential broadspectrum antimicrobial agent to overcome multidrug resistant (MDR) infections. However, a comprehensive understanding to AgNPs bactericidal mechanism of action and the relative role of particulate versus ionic Ag in AgNPs antibacterial activity is lacking but essential for their optimization for potential medical applications. Therefore, a novel method to separate and quantify Ag internalization in P. aeruginosa was developed and validated through multimethod approach. The methods used were optical density at 600 nm (OD600), LIVE/DEAD staining, transmission electron microscopy (TEM), and sorbed Ag liberation assays. After optimizing the method, it was …
A Reexamination Of The Freshwater Mussel Community Of The Little Miami River, Emily Davis
A Reexamination Of The Freshwater Mussel Community Of The Little Miami River, Emily Davis
Undergraduate Honors Thesis Projects
Understanding the changes in biodiversity and local freshwater mussel populations is critical to mitigate the risks to these populations. Freshwater ecosystems continue to degrade rapidly. The freshwater mussel community of the Little Miami River is degraded and has been in decline for many years. The biodiversity contained within freshwater ecosystems is lost at unprecedented rates influenced by human activity. Freshwater mussels play a key role in understanding the effects of human activity on freshwater ecosystems as well as maintaining the health of freshwater habitats. However, they are also sensitive to changes and disturbances, in their ecosystems. This study involved monitoring …
The Connection Between Indoor Air Quality And Mental Health Outcomes, William L. Taylor
The Connection Between Indoor Air Quality And Mental Health Outcomes, William L. Taylor
Theses and Dissertations
Mental health among United States citizens, military members, and veterans warrant research into factors not fully considered for their effects on mental health. The built environment is increasingly recognized as a potential influence on the mental health of occupants. Specifically, indoor air quality is theorized to contribute to mental illness. Through the development of a literature review, specific air pollutants common in the built environment were identified, and the mechanisms behind their effect on mental health were explored. A model framework is outlined, estimating the number of cases of major depressive disorder attributable to indoor exposure to particulate matter. The …
Management Recommendations For Jacoby Creek Land Trust’S Off-Channel Pond Site At The Kotke Ranch And Nature Preserve, Marcos Adrian Sosa Morales, Maeve Flynn, Auston Tague
Management Recommendations For Jacoby Creek Land Trust’S Off-Channel Pond Site At The Kotke Ranch And Nature Preserve, Marcos Adrian Sosa Morales, Maeve Flynn, Auston Tague
Environmental Science & Management Senior Capstones
Now more than ever there is a need for conservation easements within California because of ongoing degradation, urbanization, clear cutting and loss of habitat to ecosystems due to wildfires. The Jacoby Creek Land Trust (JCLT) is in need of a restoration and conservation plan regarding constructed off-channel ponds along Jacoby Creek. One of the ponds is flourishing and supporting different types of fishes during their migration. The other pond, our project location, is struggling to meet the JCLT’s project objectives. The pond is overgrown with European grasses due to the surrounding grazing land and has yet to see the pond's …
Environmental Governance For Whom? Examining The Political, Institutional, Fiscal, And Legal Determinants Of State Environmental Agency Budget Policy In The Us, Andrew R. Duggan
Environmental Governance For Whom? Examining The Political, Institutional, Fiscal, And Legal Determinants Of State Environmental Agency Budget Policy In The Us, Andrew R. Duggan
Theses and Dissertations
Budgets are a prospective tool of governance, and appropriations are a planning vehicle reflecting: bureaucracies’ values, complex interactions, collective preferences, political influences, and available resources. Research spanning 30 years finds that environmental pollution is a key determinant of environmental budgets in the US, though myriad factors, actors, and subsystems are important to consider. Due to federalism and devolution of responsibilities and authorities, environmental governance falls largely to the states. While the dynamics that shape state environmental budget policy have received scholarly interest, theoretically-driven examinations of environmental appropriations remain limited within the public budgeting and environmental policy literature.
Using panel data …
Pulmonary Immune Responses To Respirable Elongate Mineral Particles Of Asbestiform And Non-Asbestiform Morphologies, Timur Khaliullin
Pulmonary Immune Responses To Respirable Elongate Mineral Particles Of Asbestiform And Non-Asbestiform Morphologies, Timur Khaliullin
Graduate Theses, Dissertations, and Problem Reports
Inhalation exposure to asbestiform elongate mineral particles (EMPs) may cause pulmonary fibrosis, lung and pleural cancer. At the same time, epidemiological evidence for non-asbestiform EMP pathogenicity is scarce, with little if any risk of cancer, but consistent findings of pneumoconiosis and increased mortality. Globally, conditions caused by asbestos exposures contribute most to the occupational cancer burden and are responsible for the increasing mortality for occupational respiratory diseases. Immunological components of the fiber-induced lesions are extremely understudied, partly due to the lack of comparable test articles. In this study I utilized respirable preparations of asbestiform and non-asbestiform riebeckite and tremolite to …
Environmental Contaminants, Parasitism, And Neoplasia In White Perch Morone Americana From Chesapeake Bay, Usa, Mark Arnold Matsche
Environmental Contaminants, Parasitism, And Neoplasia In White Perch Morone Americana From Chesapeake Bay, Usa, Mark Arnold Matsche
Graduate Theses, Dissertations, and Problem Reports
White perch are an abundant demersal fish species in freshwater and oligohaline habitats of the Chesapeake Bay. An avoidance of salinity > 12-15 ppt generally restricts the distribution and movements of fish to within tributaries in the mid to lower Bay, which over time has resulted in the formation of at least three separate stocks in Chesapeake Bay. Sub-populations of white perch that are partially isolated may serve as sentinels of the conditions or stressors in the tributaries in which they reside. Fish are exposed to a variety of environmental contaminants and other anthropogenic stressors that can vary in magnitude based …