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.
Results
Showing 1 to 20 of 98 for “"Escherichia coli (E. coli)"”.
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Genomic Approaches for the Characterization of Shiga-toxigenic Escherichia coli (E. coli)
… disability, and loss of life. Shiga-toxigenic E. coli (STEC) are a significant cause of foodborne illness in Canada, and consequently, it is of high priority to improve detection, isolation, and characterization methods to mitigate their impact on public health. While current methods generally …
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Enumerating Escherichia coli (E. coli) Concentrations and Evaluating Optical Brighteners as a Potential Indicator of Human Wastewater Contamination in La Nana Bayou, Banita Creek, and their tributaries, Nacogdoches, Texas
… primary contact recreation due to elevated <em>Escherichia coli </em>(<em>E. coli</em>) levels. <em>E. coli</em> is a bacterial species commonly found in the intestines of humans and warm-blooded animals. It serves as an indicator of fecal contamination in freshwater, though its presence alone …
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Examining Tantalum-Based Photocatalysts for Photoinactivation of E. coli
Escherichia coli (E. coli) is a bacterium that contaminates potable water sources, and can cause a host of gastrointestinal infections. It is valuable to explore alternative cost-effective, efficient ways to reclaim wastewater and sterilize potable water outside of the current methods. Solar power …
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Particalized Eggshell Membrane (PEM) for Biomedical Applications
… Pseudomonas aeruginosa (P. aeruginosa) and Escherichia coli (E. coli) species. A dose-dependent anti-inflammatory activity for PEM was observed in an in vitro model but no significant difference between two finest sizes. Additionally, the antioxidant activity of PEM was significantly …
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Mechanistic studies of the Class I ribonucleotide reductase from Escherichia coli
… of two homodimeric subunits: R1 and R2. RNR from Escherichia coli (E. coli ) serves as the prototype of this class. R1 has the active site where nucleotide reduction occurs, and R2 contains the diferric-tyrosyl radical (Y · ) cofactor essential for radical initiation on R1. The rate-determining …
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A bioactive peptide, QUB-1813, from the defensive skin secretion of the Chinese Large Odorous Frog, Rana (Odorrana) livida
… against the standard Gram-negative bacterium, Escherichia coli (E. coli), the Gram-positive bacterium, Staphylococus aureus (S. aureus), and the yeast, Candida albicans (C. albicans). The peptide did not inhibit the proliferation of the human cancer cell lines, PC-3, H-157, MB-435s, and U251MG. …
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Experiment-Based Quantitative Modeling for the Antibacterial Activity of Silver Nanoparticles
… antimicrobial effect of Ag nanoparticles against Escherichia coli (E. coli) bacteria. It was observed that the presence of Ag nanoparticles increased the lag time of bacterial growth while not affecting the maximum growth rate significantly. Besides, they can inhibit bacterial growth in the …
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Étude structurale des riborégulateurs thiB et thiM
… de réguler l’expression de son transcrit. Chez Escherichia coli (E. coli), trois riborégulateurs lient la thiamine pyrophosphate (TPP) : le riborégulateur thiB qui contrôle le transport de TPP, le riborégulateur thiM qui encode le gène du sauvetage de TPP et le dernier, le riborégulateur thiC …
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The discovery and functional study of a bioactive peptide, QUB-3273, from the skin secretion of the frog, Odorrana schmackeri
… concentration (MIC) of QUB-3273 was 16 µM (Escherichia coli, E. coli), 32 µM (Staphylococcus aureus, S. aureus), and 64 µM (Candida albicans, C. albicans), respectively. The results showed consistency with the bioactivities of most peptides in brevinin-2 family. QUB-3273 showed no …
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A bioactive peptide from the defensive skin secretion of <i>Odorrana versabilis</i>
… effects against the Gram-negative bacterium, Escherichia coli (E. coli), the Gram-positive bacterium, Staphylococcus aureus (S. aureus) and the yeast, Candida albicans (C. albicans) with minimal inhibitory concentrations of 128 μM, 64 μM and 128 μM, respectively. Unfortunately, QUB-1966 has no …
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Survey of Storm Water Quality in an Urban Environment
… total suspended solids, total volatile solids, Escherichia coli (E. coli), coliform, pH, conductivity, nitrate, ammonium, phosphorus, and soluble metals. Samples were collected during ten rain events between the months of October 2011 to May 2012. Water quality analysis of the collected storm …
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Predicting and Equipping Private Well Owners at Risk of Microbial Contamination After Flooding Events in the Alabama Black Belt
… periods, potentially exposing households to Escherichia coli (E. coli) and fecal coliforms. Here, the impact of flooding on well water users across the Black Belt was quantified. A case-study approach was employed to identify microbial contamination in shallow groundwater wells and geospatial …
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Discovery and functional study of the novel bioactive peptide QUB-1980 from the skin secretion of Odorrana grahami
… aureus (S. aureus) (ATCC CRM 6538), Escherichia coli (E. coli) (ATCC CRM 8739) and Candida albicans (C. albicans) (ATCC CRM 10231) than the natural peptide. Compared with natural peptide, QUB-1347NH2 showed better ability against Klebsiella pneumoniae (K. pneumoniae) (ATCC 43816) and …
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Identification and functional study of a bioactive peptide QUB-1962 from the skin secretion of the yellow-bellied toad (Bombina variegata)
… aureus (S. aureus), Gram-negative bacteria Escherichia coli (E. coli), and fungus Candida albicans (C. albicans) and has relatively weak haemolytic activity (HC50 is 691.6 μl). The anti-cancer activity assay showed that the peptide had a significant anti-cancer effect (IC50: 3.471×10-5 M) on …
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Nanobiossensor a fibra óptica revestido com filme fino de ouro para detecção da bactéria Escherichia coli
Escherichia coli (E. coli) is a bacterial type that inhabits the intestinal tract of humans and animals, therefore, its presence in water and food is used as indicator of fecal contamination. Depending on the species, it can be harmful to health if ingested. The main method for this microorganism …
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Biochemical Analysis of the Molecular Factors of Leucyl-Trna Synthetase That Ensure Aminoacylation Fidelity
… has been identified within the CP1 domain of Escherichia coli (E. coli) LeuRS, which is distal to the hydrolytic editing active site, and contributes to translocation of mischarged tRNA products. Mutational analysis of this peptide distinguished two classes of LeuRS mutants. Both classes …
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Evaluation of sewer leakage into the stormwater drainage system in Singapore
… Chu Kang. The samples were analyzed for total coliform, Escherichia coli (E. coli), and enterococci to identify locations with high bacterial concentrations or hot spots. Then, a tracer study was conducted near a hot spot to determine if pathways exist between the sewer system and the …
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CRISPR-integrated Biosensors for Human Health: Novel strategies for pathogen detection and cancer screening
… rapid antimicrobial susceptibility testing in Escherichia coli (E. coli). Second, a CRISPR/Cas12a-based electrochemical sensor was designed for the detection of Salmonella Typhimurium in food samples. Third, a CRISPR/Cas14a system combined with blocker displacement amplification enabled …
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Identification and functional study of a bioactive peptide QUB-2007 from the skin secretion of the bicolour tree-frog Phyllomedusa bicolor
… activities against the Gram-negative bacterium, Escherichia coli (E. coli ATCC CRM 8739), and the yeast, Candida albicans (C. albicans ATCC CRM 10231) at concentration of 32 μM, and the Gram-positive bacterium, Staphylococcus aureus (S. aureus ATCC CRM6538) at a concentration of 8 μM. In terms of …
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Identification and functional study of a bioactive peptide QUB-2413 from the skin secretion of the Red-Eyed Tree Frog, Agalychnis callidryas
… activities against the Gram-negative bacterium, Escherichia coli (E. coli ATCC CRM8739), and the yeast, Candida albicans (C. albicans ATCC CRM10231) at concentration of 512 µM, while it had inhibitory effects on the Gram-positive bacterium, Staphylococcus aureus (S. aureus ATCC CRM6538). In terms …
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