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 135 for “"Coliforms"”.
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Coliforms, Salmonella, and Shigella in the James River Basin
… per month for 6 months, and analyzed for fecal coliforms, E. coli and total phosphorous. The location, date, flow rate, air temperature, precipitation, water temperature, and dissolved oxygen were recorded for each sample. A portion of each sample was concentrated onto filter paper and enriched …
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Persistence of Culturable Antibiotic Resistant Fecal Coliforms From Manure Amended Vegetable Fields
… and persistence of antibiotic-resistant fecal coliforms, a common family of fecal indicator bacteria used to track the environmental spread of antibiotic resistance. Soil samples were collected eight times over a 120-day period and analyzed for fecal coliforms utlizing a suite of MacConkey …
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The effects of rhodamine WT and chlorine on the recovery of fecal coliforms
Fecal coliforms suspended in a natural stream water were exposed to rhodamine WT dye, chlorine and both in combination. Samples were analyzed for coliforms by three enumeration techniques. Statistical analyses of data by the paired-t test showed that for non-chlorinated samples no significant …
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Hydrodynamic and Water Quality Simulation of Fecal Coliforms in the Lower Appomattox River, Virginia
… current water quality standards for fecal coliforms. To advance the analytical process by which various scenarios for improving water quality within the estuary are examined, an array of computer-based hydrodynamic and water quality models were investigated. The Dynamic Estuary Model …
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A comparison of two membrane filter techniques for the enumeration of total coliforms in potable water
… of two membrane filter techniques on coliforms exposed to varying chlorine residuals and contact times. An enrichment-step membrane-filter method (E-MF) involved the incubation of a filtered water sample on lauryl tryptose plus 1.5 per cent agar for two hours at 35°C prior to transfer …
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An evaluation of a modified membrane filter procedure for enumerating stressed fecal coliforms in chlorinated sewage effluents
… in Blacksburg, Virginia and analyzed for fecal coliforms using three procedures. Physical parameters including total suspended solids, DO, pH, turbidity, temperature and total chlorine residual were measured in effort to ascertain their effect on fecal coliform recoveries. The three procedures …
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A study of a modified membrane filter technique for the enumeration of stressed fecal coliforms in urban runoff
… stressed organisms. though growth of non-fecal-coliforms was increased and made enumeration of the fecal coliforms more difficult.
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An evaluation of a modified membrane filter technique for the recovery of fecal coliforms exposed to selected heavy metals
… for their efficiency in recovering fecal coliforms exposed to selected heavy metals. The effects on recovery by increasing time and metal concentration were also examined. The recovery methods employed included the standard membrane filter technique (S-MF) and a modified membrane filter …
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PESQUISA DE coliformes totais e coliformes termotolerantes EM QUEIJOS TIPO COALHO PRODUZIDOS COM LEITE CRU NA REGIÃO DO AGRESTE PARAIBANO
… found in milk and consequently cheeses are coliforms. Coliforms are gram-negative rods, not sporulated, that ferment lactose within 48 hours. In general, the coliforms are represented by four genera of the family Enterobacteriaceae: Citrobacter, Enterobacter, Escherichia coli and …
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Monitoring of Selected Bacteriological Parameters Associated with the Sinking Creek Total Maximum Daily Load (TMDL).
… to the state 303 (d) list and a TMDL for fecal coliforms developed. The study objectives were to 1) identify areas in Sinking Creek with elevated levels of fecal coliforms and 2) compare data collected to results from watershed models used in the TMDL. Fourteen sites on Sinking Creek were …
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Effects of distillers dried grains with solubles and dietary fiber on the intestinal health of young pigs and chicks
… growth depression and diarrhea; changes in fecal coliforms by culturing; changes in bacterial populations of intestinal mucosa by molecular methods, targeting the V3 region of the bacterial 16S ribosome; and intestinal morphology. In pigs, the inoculation with Ecoli changed the populations of …
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Some ecological factors affecting the input and population level of total and faecal coliforms and salmonella in Twelve Mile Creek, Lake Ontario and sewage waters near St. Catharines, Ontario
… Input and Population Levels of Total and Faecal Coliforms and Salmonella in Twelve Mile Creek, Lake Ontario and Sewage Waters Near St. Catharines, Ontario. Supervisor: Dr. M. Helder. The present study was undertaken to investigate the role of some ecological factors on sewage-Dorne bacteria in …
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An investigation of the effects of ozone in a recirculating aquacultural production system
… including: heterotrophic plate count, total coliforms, fecal coliforms, total solids, and total volatile solids. Results indicated ozone had a significantly positive effect in the recirculating aquacultural production system. Further study is recommended, however, to better understand the …
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Colonization of Biofilms in a Freshwater Stream by Escherichia Coli and Bacteroides
… streams has traditionally been assessed by fecal coliforms and Escherichia coli, but new research methods have allowed for the use of the anaerobic, enteric bacterium Bacteroides for molecular marker fecal detection. However, a confirmation of the presence of E. coli and Bacteroides in media other …
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Densities of indicator bacteria in urban and rural runoff
… Results indicated that mean values for total coliforms and fecal coliforms during dry flow were within Virginia State standards for urban runoff, but exceeded those two standards 100 percent and 91.9 percent of the time, respectively, during storm flow conditions. Mean values for total …
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Water quality and business aspects of sachet-vended water in Tamale, Ghana
… sachet-water samples had some total coliforms (range from 1 CFU/100ml to 115 CFU/100ml). All the 15 hand-tied sachet-water samples had total coliforms (range from 4 CFU/100ml to 2010 CFU/100ml). One sample recorded TNTC at a dilution factor of 10. The MF method showed little …
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ΜΙΚΡΟΒΙΟΛΟΓΙΚΗ ΜΕΛΕΤΗ ΘΑΛΑΣΣΙΟΥ ΝΕΡΟΥ ΣΕ ΣΧΕΣΗ ΜΕ ΡΥΠΑΝΣΗ, ΧΛΩΡΟΦΥΛΛΕΣ, ΘΕΡΜΟΚΡΑΣΙΑ, ΧΡΟΝΟ ΕΞΕΤΑΣΕΩΣ ΚΑΙ ΑΛΛΟΥΣ ΠΑΡΑΓΟΝΤΕΣ
… SOLAR RADIATION REDUCES THE ORIGINAL NUMBER OF COLIFORMS 2,1-2,86 TIMES OF AIR TEMPERATURE 1,67-1,74 TIMES. THE CORRESPONDING REDUCTION IN FACIAL COLIFORMS IS 2,45-3.37 AND 1,62-1,95. THE TIME (T) DID NOT SIGNIFICANTLYEFFECT OF THE ORIGINAL NUMBER OF MICROBES IN THE SAMPLE POSSIBLE CORRELATION …
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Microbiological Safety and Quality of Raw, Ready-to-Eat (RTE) Seafood Sold in Orange County, California
… 2021. The presence of <em>E. coli </em>and total coliforms can indicate fecal or environmental contamination. The objective of this study was to evaluate the microbiological safety and quality of raw, RTE seafood sold in Orange County, CA. A total of 105 raw, RTE samples of sushi, ceviche, and …
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Isolation, Enumeration and Identification of Enterococci
… indicators. |It is still debatable whether the coliforms or the enterococci are better indicators of contamination in food and water. However, there is a definite trend toward the use of the enterococci in preference to the coliform group for the detection of bacterial contamination.|It is of …
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