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 50 for “"coliform bacteria"”.
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Studies on the survival of coliform bacteria from human and animal wastes
Pages 62, 97 and 127 missing from original copy
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The modeling of fecal coliform bacteria in the North and South rivers
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1999.
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The usefulness of multiple antibiotic resistance (MAR) indexing technique in differentiating fecal coliform bacteria from different sources
… microbial risk-free water. For decades fecal coliform counts have been used as indicators of fecal contamination and the potential presence of intestinal pathogens in surface waters. However, fecal coliforms fail to provide information about the source of fecal contamination. Knowing the …
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Evaluation of methodology for detection and quantification of coliform bacteria and their survival in soil and water.
… the risk of contamination. The presence of coliform bacteria and in particular E. coli, in private water supplies is an indication of the potential for the water supply to be contaminated with pathogenic microorganisms. With the increasing occurrence of severe illness from pathogens such as …
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Groundwater contamination by selenium, nitrate, coliform bacteria, and volatile organic compounds in the Las Vegas Valley, Nevada, shallow aquifer zone
… Nevada, was sampled for selenium, nitrate, coliform bacteria and 37 volatile organic compounds. A distinct pattern of elevated levels of selenium, nitrates, and chloroform was observed in the developed portions of the valley. Evidence suggests that the probable sources for these contaminants …
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Evaluation of Constructed Wetlands for the Waste Management of a Large Scale Swine Production Unit
… demand, and to reduce the levels of the Fecal Coliform Bacteria from a swine operation was evaluated. The indicator of proper waste purification will be the result of testing for the following: ammonia nitrogen, nitrate nitrogen, total phosphorus, total suspended solids, dissolved solids, …
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Stormwater Treatment by Two Retrofit Infiltration Practices
… through increases in sediment, nutrient, and bacteria concentrations. In response to water quality and quantity issues within the Stroubles Creek watershed, the Town of Blacksburg and Virginia Tech designed and constructed two innovative stormwater best management practices (BMPs). The goal of …
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Studies on the quality of ice cream
… had been adequate. Low numbers of thermoduric bacteria but variable numbers of coliform bacteria and mesophilic bacteria were found in the ice cream samples suggesting some post-pasteurization contamination. Examination of isolates on plates poured with violet red bile agar showed that many of …
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American Alligator Fecal Coliform and Pathogen Identification, Genotypic Fingerprinting, and REP-PCR Bacterial Source Tracking in South Carolina
… cold-blooded) wildlife sources, including fecal coliform identification, genotypic fingerprinting, and bacterial source tracking. The overall goals were to identify, fingerprint, and detect American alligator (<em>Alligator mississippiensis</em>) fecal coliform bacteria in surface waters, as …
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Determination of Urban Land Use Variables That Accurately Predict Fecal Coliform Levels In Shellfish Harvesting Waters Within Estuarine Salt Marsh Ecosystems of the Southeastern United States of America.
… level within a coastal watershed, and fecal coliform bacteria levels in the adjoining receiving waters. Regression modeling was used to determine a simple model to represent the relationship between fecal coliform and urban land use metrics. Sources used included a parcel level dataset for a …
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Investigations of freshwater surface microlayers: comparisons of methods for sampling various microlayer thicknesses with observations on select chemical and microbiological features of microlayers of three aquatic ecosystems relative to the bulk of subsurface water
… (3) select metals, (4) fungal populations, (5) bacterial populations, (6) most probable numbers of coliform bacteria, and (7) algal populations and distributions. The results showed that surface microlayers were often microbiologically and chemically enriched relative to the subsurface water. …
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Assessing the Contamination Risk of Private Well Water Supplies in Virginia
… unsafe for consumption. Nitrate and total coliform bacteria are both health contaminants and are both regulated in public water systems. A nitrate concentration of 10 mg/L or higher is considered unsafe, as is the presence of total coliform bacteria. Well degradation, inadequate well …
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A mycological survey of commercial whirlpools in Delaware and Madison counties, Indiana
… for one that clustered with female facilities. Coliform bacteria were found in 43% of all samples, and blue-green fluorescent pseudomonads were found in 54% of all samples. Most dermatophytes were isolated from the step access surface of the facilities tested, and more Candida species were …
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The Impact of Land Use on Water Quality: a Comparison of the Roaring River and Piney Creek Drainage Basins of Southwest Missouri
… parameters: dissolved oxygen, nitrate, fecal coliform bacteria, fecal streptococcus bacteria, and conductivity. The two drainage basins studied were the pristine Piney Creek Wilderness basin and the more developed Roaring River basin. The physical variables and land used for the basins were …
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Spring Studies and A Decision-Making Process to Guide Groundwater Contamination Prevention in an Agricultural Karst Basin
… contribute to the elevated levels of fecal coliform bacteria in the groundwater. Six sites in Buckeye Creek basin were monitored for fecal coliform contamination and then analyzed in order to determine where best management practices (BMPs) could result in the most effective water quality …
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Microbial and Chemical Affects on Leachate from Calcareous Soils Treated with Wastewater Effluent
… one field lysimeter contained increased fecal coliform counts than the effluent. Leachate coliform counts were decreased or not significantly changed in two field lysimeters. Electrical conductivity (EC), sodium adsorption ratio (SAR), chloride and nitrate concentrations also increased …
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Ability of Klebsiella spp. mastitis isolates to produce virulence factors for enhanced evasion of bovine innate immune defenses
Klebsiella spp. are coliform bacteria that cause mastitis in dairy cattle and account for high mortality rates in infected cows leading to a significant financial loss. Recent outbreaks indicate that within farms a single strain can be responsible for clinical signs in multiple animals. …
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Development of a water sample concentrator for the concentration of bacteria in drinking water
… a membrane adsorption/elutriation procedure for bacterial recovery was developed and field-tested. Influent sample volumes of 19.0 liters were processed by the concentrator within 10 minutes. Standard MPN and membrane filtration tests were conducted to determine the efficiency of the …
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As Evaluation of Methods Employed in the Detection of Pathogenic Escherichia Coli
… have investigated and discussed the role of coliform bacteria in summer diarrhea and infantile enteritis. Early investigators were hampered by the fact that only biochemical studies had been employed. Unfortunately this was not adequate, because it has been found that the E. coli group is …
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Water Quality Study and Plume Behavior Modeling for Lake Pontchartrain at the Mouth of the Tchefuncte River
… impacted by the presence of high levels of Fecal Coliform bacteria following periods of rainfall. This is a potential problem for recreational uses of the area. In 2003 a field sampling study was initiated in the north shore area of the Lake at the mouth of the Tchefuncte River. The objectives …
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