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Articles 1 - 6 of 6
Full-Text Articles in Pharmacology, Toxicology and Environmental Health
Linking Microbial Phylogenetic And Functional Gene Diversity To Microbial Mat Ecosystem Function Following Environmental Disturbance, Eva Christine Preisner
Linking Microbial Phylogenetic And Functional Gene Diversity To Microbial Mat Ecosystem Function Following Environmental Disturbance, Eva Christine Preisner
Theses and Dissertations
The ability of ecosystems to adapt to environmental perturbations depends on the duration and intensity of change and the overall biological diversity of the system. In this study, a microbial mat ecosystem located on San Salvador Island, the Bahamas was used as a model to examine how environmental disturbance affects microbial community resistance, their protein synthesis potential (PSP), ecosystem function as measured by biogeochemical cycling, community stability, and resilience. This ecosystem experienced a large shift in salinity (230 to 65 g kg-1) during 2011–2012 following the landfall of Hurricane Irene on San Salvador Island. High throughput sequencing and analysis of …
Application Of Polymer-Coated Magnetic Nanoparticles For Oil Separation, Seyyedali Mirshahghassemi
Application Of Polymer-Coated Magnetic Nanoparticles For Oil Separation, Seyyedali Mirshahghassemi
Theses and Dissertations
Oil spills and storm water runoffs can have serious impact on the environment with potentially major economic impacts. Given the limitation of current oil clean-up technique, the application of nanotechnology for oil remediation has been widely studied showing a promising avenue of research. This dissertation reports a cheap, facile and cost-effective nanotechnology-based oil clean-up technique that has been optimized for effectiveness and feasibility and reduced adverse environmental impacts. The synthesized polyvinylpyrrolidone (PVP)-coated magnetic nanoparticles (NPs) have been characterized using different techniques and the oil removal efficiency investigated under a wide range of environmentally relevant conditions. Based on the characterization data, …
Effect Of Environmental Factors On The Aggregation Behavior Of Silver Nanoparticles In The Aquatic Environment, Kamelia Afshinnia
Effect Of Environmental Factors On The Aggregation Behavior Of Silver Nanoparticles In The Aquatic Environment, Kamelia Afshinnia
Theses and Dissertations
Understanding the environmental factors that affect the fate and effects of engineered nanoparticles (ENPs) in the environment is crucial for NP risk assessment. Silver nanoparticles (Ag NPs) readily transform in the environment, which alters their properties and subsequently their transport, fate, and toxicity. The overall aim of this dissertation was to evaluate the effects of Ag NPs physicochemical properties (e.g., size, surface charge, surface coating) and water chemistry (e.g., buffer concentration, organic ligands, natural organic matter) in controlling Ag NPs colloidal stability. This aim was achieved by systematically 1) review and rationalize many studies that investigated the aggregation kinetics of …
Inhibition Of Aflatoxin Biosynthesis With Vibrio Gazogenes, Phani Madhuri Gummadidala
Inhibition Of Aflatoxin Biosynthesis With Vibrio Gazogenes, Phani Madhuri Gummadidala
Theses and Dissertations
Aflatoxin, a mycotoxin, is one of the world’s most potent carcinogen. It contaminates major food products such as milk, grains, nuts, corn, etc., leading to greater than $ 1 billion in economic losses and when ingested causes hepatocellular carcinoma (HCC). It is the primary risk factor for 75% HCC cases in the developing world and 3% HCC cases in developed world. Most common methods used in agriculture to reduce aflatoxin contamination are expensive, time consuming and have low efficiency with limited success rates where as biological controls were proven to be most effective in inhibiting aflatoxins and aflatoxin producing fungi. …
Environmental Impacts On Enterococcus In Shem Creek, South Carolina, And Characterization Of Changing Land Use, Maria Elizabeth Zubizarreta
Environmental Impacts On Enterococcus In Shem Creek, South Carolina, And Characterization Of Changing Land Use, Maria Elizabeth Zubizarreta
Theses and Dissertations
Zoning and land-use practices have a direct influence on hydrologic systems and can impact water resources. Linkages between change in land uses and degradation of water quality in stream and watershed environments have been well established. Shem Creek, located in Mount Pleasant, SC, has a history of fecal indicator bacteria levels that exceed the Environmental Protection Agency’s recreational water quality standards. With recent coastal population and development trends, proper management and the sustainability of beach and estuary environments are a rising public health concern. The objective of this study is to determine what climatic and water quality parameters are associated …
Understanding The Impact Of Land Use On Microbial Water Quality To Support Decisions For A Future Land Use Plan, Mohammed Tawfiq Aljassim
Understanding The Impact Of Land Use On Microbial Water Quality To Support Decisions For A Future Land Use Plan, Mohammed Tawfiq Aljassim
Theses and Dissertations
May River meandering through the Town of Bluffton, South Carolina has been known for its high level of water quality. The May River is one of the major sources of shellfish harvesting in South Carolina. Due to the non-point source pollution of fecal coliform, the water quality of the May River became degraded. As a result, shellfish harvesting classification in the May River was downgraded for the first time in its history. The rapid growth of the Town has led to a change in land use, which might be related to the increased levels of fecal coliform in the stream …