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 78 for “"Pathogenic microorganisms"”.
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Evaluation of methodology for detection and quantification of coliform bacteria and their survival in soil and water.
… for the water supply to be contaminated with pathogenic microorganisms. With the increasing occurrence of severe illness from pathogens such as E. coli O157, which have been found in a number of private water supplies, there is an increasing concern with regards to groundwater quality. This …
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Selective microorganism concentration using a dielectrophoresis-based microfabricated device
Detection of pathogenic microorganisms is a significant challenge in medicine, environmental protection and biological threat safety because samples are often contaminated. This work presents a method of separating bacterial spores from typical air contaminants such as sand or soot by means of …
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Electrodisinfection of Municipal Wastewater Effluent
… of disease from sewage treatment effluents, pathogenic microorganisms present must be destroyed by one or a combination of disinfection methods. Chlorine remains the predominant disinfectant used although it consumes considerable amounts of energy and has associated exposure risks from …
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Colonization dynamics of oro-gastrointestinal microbes critical to infant health
… in infant formula is the promotion of pathogenic microorganisms. In preterm infants, the gastrointestinal tract lacks the maturity of term infants. A severe consequence of an immature gastrointestinal tract is an increased risk of local and disseminated infections. A common secondary …
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Lactoperoxidase System Effects on Escherichia Coli K-12 in the Manufacture of a High Moisture and High pH Cheese (Queso Fresco)
… in a cheese that can support the growth of pathogenic microorganisms. Lactoperoxidase is not completely inactivated at pasteurization temperatures; however, its activity decreases with the increase in the processing temperature. Reduced lactoperoxidase activity results in the reduction of …
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Studies on the quality of ice cream
… of four brands in the second sampling. No pathogenic microorganisms were detected in ice cream and the lack of residual phosphatase suggested that pasteurization had been adequate. Low numbers of thermoduric bacteria but variable numbers of coliform bacteria and mesophilic bacteria were …
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The discovery and evaluation of a novel bioactive peptide, QUB-3112, from the defensive skin secretion of Hylarana guentheri
… play a significant role in defence against pathogenic microorganisms, including bacteria, fungi, parasites, enveloped viruses and so on. They are a rich source of bioactive compounds, including bufogenins, steroids, peptides, etc. To date, many peptides with various bioactivities have been …
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Investigation of pathogens removal from wastewater using a hydroponic system
… and environment. It may lead to distribution of pathogenic microorganisms in water, which may lead to waterborne diseases outbreaks. The current municipal wastewater treatment systems employ the chlorination process for disinfection and inactivation of pathogenic microorganisms. This process has …
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The Presence of Pathogenic Bacteria in Recirculating Aquaculture System Biofilms and their Response to Various Sanitizers
… of aquaculture presents a great potential for pathogenic microorganisms to become established in the system through the formation of biofilms. Biofilms are capable of forming on all aquaculture system components, incorporating the various microflora present in the water. Pathogenic …
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Effectiveness of Wastewater Treatment for Selected Contaminants Using Constructed Wetlands in Mediterranean Climates
… chemical oxygen demand (COD). Removal rates for pathogenic microorganisms and nutrients such as total Kjeldahl nitrogen and total phosphorous were variable among the case studies. Overall removal effectiveness was affected by various factors such as the presence of macrophytes, temperature, …
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PESQUISA DE coliformes totais e coliformes termotolerantes EM QUEIJOS TIPO COALHO PRODUZIDOS COM LEITE CRU NA REGIÃO DO AGRESTE PARAIBANO
… risks to the population. One of the most pathogenic microorganisms 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 …
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Development of LDPE-based antimicrobial films for food packaging
… aimed at killing or inhibiting the spoilage and pathogenic microorganisms that may contaminate packaged food products. Over the years there has been an increased emphasis on naturally derived AM agents and polymer films containing AM agents derived from basil, for example, exhibit an AM effect …
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Identification and bioactivity evaluation of a novel peptide from the skin secretion of Pelophylax kl. esculentus
… system that protects the animal from invasion by pathogenic microorganisms.<br/>In this thesis, a novel peptide (QUB-1342) was discovered in the skin secretion of the European edible frog, Pelophylax kl. esculentus. The precursor structure was found through applying a “shotgun” cloning method, and …
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The Role of the C-terminus in Bacillus subtilis inorganic pyrophosphatase activity
… drugs effective against a significant number of pathogenic microorganisms depending upon these enzymes for macromolecular syntheses.
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Assessment of antibiotic resistance phenotypic patern in some commensal bacteria isolated from meat and dairy products
… health problem since resistance genes of pathogenic microorganisms can be transmitted from foodstuffs such as dairy and meat products to human. Therefore, the objective of this study was to assess the antibiotic resistance pattern of commensal bacteria isolated from meat and dairy products …
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Identification and functional study of the bioactive peptide QUB-2417 from the skin secretion of the tree frog, Phyllomedusa bicolor
… focused on AMPs. Generally, it is difficult for pathogenic microorganisms to develop resistance to AMPs because of their action mechanism. In this thesis, an AMP was identified from the skin secretion of Phyllomedusa bicolor, a tree frog from the Amazon rainforest, and was named QUB-2417. The …
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QUB-1985: a bioactive peptide from the frog skin secretion of Odorrana livida
… problem of drug resistance developed by multiple pathogenic microorganisms, scientists have been working on developing novel therapeutic agents to replace conventional antibiotics. Antimicrobial peptides (AMPs), possessing broad-spectrum antimicrobial activity, have raised great interests among …
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The discovery of a bioactive peptide, QUB-1957, from the defensive skin secretion of the Chinese piebald odorous frog, Odorrana schmackeri
More and more pathogenic microorganisms have developed drug resistance, which has led to the search for new alternatives to antibiotics as one of the hottest topics nowadays. The frog skin secretion may be a potential source where increasing numbers of antimicrobial peptides (AMPs) have been …
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Transport of copiotrophic bacteria in oligotrophic coarse soils: a Monte Carlo analysis
… and installed with the assumption that most pathogenic microorganisms will not pass unaltered through an unsaturated zone located in the soil below each system. Studies have shown that 0.6 to 1.2 m of unsaturated soil below an on-site system drainfield is sufficient to remove most bacteria …
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An Analysis of Current Standard Operating Procedures for Fresh and Fresh-Cut Produce in Retail Foodservice Operations
… consumption of raw produce and the fact that pathogenic microorganisms are not killed due to the lack of a kill step such as cooking. The foodservice industry has worked with regulatory agencies diligently to develop and implement food safety training materials for supervisors; however, this …
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