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 43 for “"source tracking"”.
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Particle labeling for sediment source tracking on hillslopes
… which evolves temporally and spatially. Sediment source tracking can be used to identify the areas within a watershed where erosion is greatest. This study evaluated three sediment source tracking techniques, rare earth element (REE) particle labeling, interrupted rills, and ground based LIDAR, on …
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Bacterial Source Tracking of E. coli in a Constructed Wetland
<p>Bacterial source tracking was used to identify sources of fecal contamination in a constructed wetland. Nucleotide sequence differences in the <em>Escherichia coli </em>malate dehydrogenase (<em>mdh</em>) gene were used to distinguish between strains isolated from pigeon and cattle feces. …
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Microbial Source Tracking in a Mixed Use Watershed in Northern Virginia
… levels of fecal indicator bacteria (FIB). The sources of fecal pollution in neighboring watersheds within the county were determined over the 12 months previous to this project by performing Antibiotic Resistance Analysis (ARA, a microbial source tracking protocol) on Enterococcus and …
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Examining Fluorescent Decay Rates For Microbial Source Tracking In South Carolina Blackwater Systems
<p>Richland County, South Carolina, has many watersheds appearing on the EPA's 303(d) list, including the Gills Creek watershed. This study interprets current water quality data within the Gills Creek watershed through the use of intensive target stream sampling for Escherichia coli (E. coli) as …
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Bacterial Source Tracking in the Sinking Creek Watershed Using Antibiotic Resistance Analysis and Ribotyping.
… with the presence of pathogens. Bacterial source tracking is a term describing methods to determine the origin of fecal pollution based on bacterial traits. The objective of this research is to evaluate the use of 2 bacterial source tracking techniques, antibiotic resistance analysis (ARA) …
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Density-Based Clustering of High-Dimensional DNA Fingerprints for Library-Dependent Microbial Source Tracking
… have developed a new Library-Dependent Microbial Source Tracking method for identifying the host animals causing fecal contamination in local water sources. The Cal Poly Library of Pyroprints (CPLOP) is a database which stores E. coli representations of fecal samples from known hosts acquired from …
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Microbial Source Tracking of Bacteroides to Identify Human and Bovine Fecal Loading in McDaniel Lake
… health hazards to humans. By determining the source of fecal pollution, practices can be implemented to reduce the amount entering waterways. Bacteroides sp. have previously shown high host specificity allows for species-specific identification of fecal sources. Using quantitative real-time …
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Use of Escherichia coli for Microbial Source Tracking in a Mixed Use Watershed in Northern Virginia
… were chosen for E. coli monitoring and microbial source tracking (MST). MST was performed using antibiotic resistance analysis (ARA) and fluorometric analysis. Escherichia coli was chosen as the indicator bacterium for purposes of comparison with previous project data and because a large body of …
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Fecal Matters: Fate and transport of traditional fecal indicator bacteria and source-tracking targets in septic drainfields
… and/or E. coli at the point of use. Non-point sources of pollution, including septic tank leakages and poorly constructed drain fields, have been identified as the leading risk factors associated with outbreaks in households dependent on groundwater. Ideally, the integration of emerging source …
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American Alligator Fecal Coliform and Pathogen Identification, Genotypic Fingerprinting, and REP-PCR Bacterial Source Tracking in South Carolina
… performed to assess numerous coastal nonpoint source pollution components from poikilothermic (i.e. cold-blooded) wildlife sources, including fecal coliform identification, genotypic fingerprinting, and bacterial source tracking. The overall goals were to identify, fingerprint, and detect …
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A Comparative Study of Three Bacterial Source Tracking Methods and the Fate of Fecal Indicator Bacteria in Marine Waters and Sediments
… (FIB) in sand and sediments. The microbial source tracking (MST) methods antibiotic resistance analysis (ARA), Bacteroides human-specific primer test, and fluorometry were compared against the FIBs to determine how reliable each method was in detecting the presence of human fecal …
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Evaluation, Development and Improvement of Genotypic, Phenotypic and Chemical Microbial Source Tracking Methods and Application to Fecal Pollution at Virginia's Public Beaches
The microbial source tracking (MST) methods of antibiotic resistance analysis (ARA) and fluorometry (to detect optical brighteners in detergents) were used in the summers of 2004 and 2005 to determine the origins of fecal pollution at beaches with a past history of, or the potential for, high …
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Host Specific Microbial Source Tracking and Quantification Using the Partial 16SrRNA Gene Sequence of Bacteroides on the Wilson's Creek Tributary in Southwest Missouri
… problems. Many different point and non-point sources of fecal contamination influence Wilson's Creek in Southwest Missouri. Use of Escherichia coli for identification of fecal contamination in fresh water streams is the commonly used method approved by the EPA, but is limited in the ability to …
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Host Specific Microbial Source Tracking and Quantification Using a Partial 16SrRNA Sequence of Bacteroides on the Finley River, a Tributary of the James River in Southwest Missouri
<p>Microbial source tracking (MST) is a general term given to any process which aims to determine the source of microbial contamination found in an environmental (usually water) sample. These methods include both phenotypic and genotypic strategies. In this study, quantitative PCR was used to …
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Quantifying Potential Sources of Microbial Contamination in Household Drinking Water Samples
… Engineering Department. Microbial and chemical source tracking were used to identify possible sources of contamination. A logistic regression was employed to investigate potential correlations between TC contamination and chemical parameters (e.g. NO3-, turbidity) as well as homeowner provided …
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Effects of 2015 earthquake on biological stability of water in Nepal
… in biological stability of the water sources compounded by poor sanitation practices in Kathmandu (severe earthquake damage) and Jhapa (no earthquake damage) using microbial source tracking and 16S rRNA sequencing. Samples from the same locations were taken before the earthquake in …
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The usefulness of multiple antibiotic resistance (MAR) indexing technique in differentiating fecal coliform bacteria from different sources
Pollution of water sources with human fecal matter and associated intestinal pathogens poses a great risk to public health. Fecal contamination of water is not the only problem to communities that consume untreated water. The extent of the microbial contamination of water sources also needs to be …
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Evaluating human fecal contamination sources in Kranji Reservoir Catchment, Singapore
… above recreational water quality criteria; their sources and distribution under dry and wet weather are also unknown. The goal of this study was to evaluate the distribution of E. coli under dry and wet weather, to determine the sources of the human fecal contamination, and to validate the use of …
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Human Adenoviruses As Indicators Of Faecal Contamination And Pathogen Indices In The Environment And Shellfish
… and so should be used as part of a multi-tool source tracking system. Shellfish studies showed a low occurrence of HAdVs and HPyVs, probably due to poor virus recovery. Further studies are required to investigate this. The results of this study strongly supported the hypothesis that HAdVs and …
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