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 73 for “"Microbial Contamination"”.
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Quantifying Potential Sources of Microbial Contamination in Household Drinking Water Samples
… Previous literature acknowledges bacterial contamination in private water supplies as a significant public health concern in the United States. The present study tested private wells and springs in 20 Virginia counties for total coliforms (TC) and E. coli (EC) along with a suite of chemical …
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Microbial contamination in the Kathmandu Valley drinking water supply and Bagmati River
… investigation was to determine and describe the microbial drinking water quality problems in the Kathmandu Valley. Microbial testing for total coliform, E.coli, and H2S producing bacteria was performed in January 2000 on drinking water sources, treatment plants, distribution points, and …
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Microbial contamination and removal from drinking water in the Terai region of Nepal
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2001.
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Bursting bubbles and water-to-air-transfer : interplay between underlying physics and microbial contamination
… We then studied the influence of microorganism contamination. We discovered that bacterial secretions can make bubbles live longer and indirectly enhance their thinning. As a consequence, bubbles in contaminated water emit smaller, faster, and more numerous droplets than in clean water: …
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EVALUATION AND MODELING OF RISK FACTORS ASSOCIATED WITH MICROBIAL CONTAMINATION IN PRODUCE PRE-HARVEST ENVIRONMENT
… outbreaks have been traced back to contamination occurring at pre-harvest production level. The overall goal of this dissertation was to identify risk factors for produce pre-harvest contamination and develop models to predict the introduction, survival, and persistence of enteric …
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Predicting and Equipping Private Well Owners at Risk of Microbial Contamination After Flooding Events in the Alabama Black Belt
… A case-study approach was employed to identify microbial contamination in shallow groundwater wells and geospatial modeling was used to characterize flooding risk across the Black Belt. The compilation of available and reliable resources into a single-point source will aid in educating and …
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Engineering antimicrobial strains of saccharomyces cerevisiae as industrial platform for non-sterile bioprocesses
Microbial contamination is a major challenge in fuel ethanol facilities, especially during the fermentation stage. Bacterial contaminants compete with yeast for fermentable sugars and nutrients, which obstructs starch to ethanol conversion. This leads to a reduction in ethanol yield. At large …
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Assessing microbial quality of beer heat treated by flash and tunnel pasteurization.
… carbon dioxide and energy. A large percentage of microbial contamination occurs when the yeast strains are introduced into the process. Beer is a high nutrient product that is susceptible to microbial contamination. Beer contamination is when microorganisms are present in the product. These …
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Evaluation of the Correlation Between the Oxidation Reduction Potential and Free Chlorine Residual for Different Chlorine Sources Used in Poultry Drinking Water Sanitation
… of free chlorine is present for controlling microbial contamination regardless of the actual amount of total or free chlorine or the water pH. A recent bench top evaluation of a new chlorine product revealed microbial contamination even when the oxidation-reduction potential read 650 mV. …
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Development of xylem-based water filters
Diarrheal diseases caused due to microbial contamination are one of the leading causes of fatalities amongst children. Despite the availability of numerous commercial products for water filtration and treatment, there continues to be a need for technological solutions that can make safe drinking …
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Prevalence of Salmonella and E. coli on Produce from Seattle Farmers Markets
This study surveyed the extent of microbial contamination on lettuce and tomatoes purchased from farmers markets, an increasingly popular source of local produce. Foodborne outbreaks in the U.S. have implicated <italic>Salmonella</italic> and <italic>E. coli</italic> as etiologic agents associated …
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Improving beef quality through pre-slaughter cattle management
… this procedure at controlling hide and carcase microbial contamination is questionable. Additionally, it has been shown to negatively affect meat quality and may adversely affect welfare. Lairage factors affecting dark cutting incidence and animal behaviour were identified and spanned from the …
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Oral Cavity: A Biosystems and Potential Source of Infectious Material // Устната кухина – биосистема и възможен източник на инфекциозен материал
[EN] Oral Cavity is the main entry of microbial contamination, an environment breeding many pathogens and a habitat of different viruses. It’s the entrance to digestive tract and is often the subject of studies in dental medicine. Compared to other body cavities, the oral cavity and its …
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URBAN WASTEWATER REUSE IN AGRICULTURE: RECENT PERSPECTIVES FROM CASE STUDIES IN SICILY
… was characterized by a certain persistence of microbial contamination and among the studied vegetable crops, lettuce responds better, than zucchini and eggplants, to the irrigation with low quality water, evidencing a bettering of nutraceutical properties and production parameters.
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CPLOP: The Cal Poly Library of Pyroprints
<p>To date, microbial source tracking (MST), i.e. determining the source of microbial contamination based on the specific strains observed in the environment, often uses methods that are time-consuming, expensive and not always reliable. The biology department at Cal Poly, San Luis Obispo has …
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Feasibility study of surface applications for Flashblast[TM] radiation in the food industry
… to eliminate or significantly reduce surface contamination. FLASHBLAST™ is the trademark of a pulsed power electromagnetic radiation apparatus developed by Maxwell Laboratories, Inc., San Diego, CA. A FLASHBLAST™ transforms electrical energy into high intensity, short duration pulses of …
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The source, cost and prevention of central venous catheter-related infection
… of such infections and the efficacy of an antimicrobial catheter have been undertaken. Thirty patients who required a CVC as part of their medical management and underwent cardiac surgery had the distal tips of their catheters sampled whilst in situ. Sampling took place within 1 h of catheter …
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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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A study to determine the efficacy of A 0,2 μm air venting final in-line intravenous filter in reducing the complications of intravenous therapy
… was most pronounced when intravenous antimicrobial agents, especially the cephalosporins, were administered. Micro-organisms were isolated from 13% (28/209) of filters which originated from 31% (16/32) of infusions with filters in-line. A relationship could not be established between the …
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