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 32 for “"Antimicrobial efficacy"”.
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Antimicrobial efficacy of nisin, oregano and ultrasound treatments against foodborne pathogens in ready-to-eat vegetables
Submitted in fulfillment of the academic requirements for the Master of Applied Sciences in Food Science and Technology degree at the Department of Biotechnology and Food Science, Faculty of Applied Sciences Durban University of Technology, Durban, 2020.
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Investigating the impact of three washing methods on antimicrobial efficacy, texture, and color of spinach and tomatoes
… after treatment and throughout storage. The antimicrobial efficacy of three washing methods (water, 100 ppm sodium hypochlorite, and 1% citric acid) were investigated on spinach and tomatoes. The washing method parameters were optimized and the immediate impact of the three washing methods on …
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An assessment of medicinal hemp plant extracts as natural antibiotic and immune modulation phytotherapies
This study aimed to evaluate the antimicrobial efficacy of medicinal hemp plant extracts to determine the antibacterial effects of indigenous Sansevieria species and exotic Cannabis sativa phytotherapy varieties. This study also assessed whether aqueous o
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Influence of an Irrigation System Utilizing Apical Negative Pressure on Bacterial Elimination during Endodontic Therapy: a prospective randomized clinical study
… Previous investigations of irrigants and the efficacy of delivery systems have yielded mixed results in obtaining microbe-free (MF) root canals. Recent in-vitro studies evaluating root canal debridement using an apical negative pressure irrigation system, EndoVac<sup>TM </sup>(EVI), have …
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pH Stability of Calcium Hydroxide Preparations in a Simulated Acidic Environment
… effects and promotes healing. However, its efficacy is challenged by the acidic pH of purulent exudates in infected root canals. This study aimed to evaluate the pH stability of three calcium hydroxide preparations—BC Temp (bioceramic-based), UltraCal XSTM, and mixed Ca(OH)₂ powder with …
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Antimicrobial hand rub : an investigation of the various chemicals used in the concentrate skin formula to enhance the product performance
… project was conducted in order to evaluate the antimicrobial efficacy of an alcohol-free skin concentrate formula intended for use on hands. Substitute compounds for alcohol in antimicrobial formulae is receiving much interest due to the tendency of alcohol to dry and irritate the skin after …
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Calorimetric studies of microbiological systems
… a variability of 2 to 4% were used to test the antimicrobial efficacy of Aquacel-Ag compared with silver nitrate on P. aeruginosa, S. aureus, and a 50:50 mixed culture in both nutrient broth and simulated wound fluid (SWF). Results show that a small amount (1 cm2) of wound dressing containing …
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Antimicrobial pharmacodynamics: The gentamicin - Escherichia coli relationship
… the relationship in an attempt to better predict antimicrobial efficacy. A unique in vitro dynamic culture system was constructed to subject bacteria growing in broth culture to drug concentrations simulating in vivo gentamicin exposure. Changes in viability were monitored as a function of …
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An analysis of the cellular and humoral immune responses of Galleria mellonella larvae
… of pathogenicity of microorganisms or the antimicrobial efficacy of drugs. Due to the low cost, fast turnover of results and lack of ethical constrictions the insect screening model has been used widely. The work presented here in this thesis sought to establish the effects of using …
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Effects of heat and acid stress on bacterial populations of beef, and on susceptible and multi-antimicrobial resistant Salmonella isolated from beef
… to serve as initial investigations evaluating antimicrobial efficacies of decontamination treatments applied to beef carcass tissue following chilling, prevalence of susceptible and antimicrobial resistant Salmonella on beef animal hides and carcasses, and whether antimicrobial resistance …
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Avaliação do uso de nano carreadores de ramnolipídeos associados ao fotossensibilizador azul de Taylor na terapia fotodinâmica antimicrobiana contra Staphylococcus aureus: estudo in vitro
… the search for alternative therapies, such as Antimicrobial Photodynamic Therapy (PDT). With the advancement of science, nanotechnology techniques are increasingly present, promoting the enhancement of existing techniques. This study evaluated, in vitro, the efficacy of PDT coupled with carrier …
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An investigation into the effects of shape and structure on the antibacterial efficacy of metal nanoparticles
… (AgNPs), copper (CuNPs) and gold (AuNPs) exhibit antimicrobial properties against bacteria, including Escherichia coli and Enterococcus faecium. E. coli O157:H7, which is known to be virulent and infectious, causing bowel discomfort, diarrhoea, nausea or vomiting. Enterococci frequently causes …
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ASSESSMENT OF ANTIBACTERIAL EFFECT AND FLOWABILITY OF BIOCERAMIC SEALER MODIFIED WITH BaTiO3 NANOPARTICLES
… significantly enhanced the antibacterial efficacy compared to BC sealer. However, there was no significant difference between the BC+BTO 5% and BC+BTO 10% groups (BC: 3.90 ± 0.27, while both the BC+BTO 5%: 3.31 ± 0.12, BC+BTO 10%: 3.01 ± 0.22). Conclusion: An antibacterial piezoelectric …
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Experimental Studies on the Microbiota associated with Urinary Tract Infections
… in urine. This study also investigated the antimicrobial efficacy of cetylpyridinium chloride (CPC). CPC coated latex catheters were able to prevent biofilm formation at very low concentrations. This finding provides promising evidence for the potential application of CPC impregnated …
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An investigation of the effects of an antimicrobial peptide on the survival of Acanthamoeba and intracellular bacteria associated with Cystic Fibrosis
… It is vital to develop alternative therapies. Antimicrobial peptides are predominant candidates for combatting pathogenic bacteria. Free Living Amoebae is widely distributed in the environment and may also contaminate CF lung. It is well known that Acanthamoeba feed on and protect bacteria. The …
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Investigation of the presence and activity of the innate immune component, Complement, in bovine milk
… processing disciplines. In order to retain the antimicrobial efficacy associated with xi Complement in raw bovine milk, milder process treatments than hitherto practised in industry should be adopted.
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Role of extended spectrum beta lactamases producing E. coli and Acanthamoeba in urinary tract infections
… Acanthamoeba. The indiscriminate use of various antimicrobial drugs has resulted in the development of drug resistance. Therefore, looking for new or additional antimicrobial compounds is urgent. Four clinical strains of E. coli (three ESBL+ve (TEM, AmpC, and OXA-48) and one ESBL–ve used as a …
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In Vitro Evaluation of the Biolase ER,CR:YSGG Side-Firing Tip For Bacterial Biofilm Reduction and Smear Layer Removal in Root-End Cavity Preparation
… of this in vitro study was to evaluate the antimicrobial efficacy and smear layer removal capacity of a Biolase Waterlase iPlus Er,Cr:YSGG laser equipped with a side-firing tip on Enterococcus faecalis biofilm-contaminated retroprepared root-end surfaces. Methods Twenty-five extracted …
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DEVELOPMENT OF NOVEL COPOLYOXETANES: ANTIMICROBIAL AGENTS
<p>This thesis focuses on solution antimicrobial effectiveness for copolyoxetanes with quaternary ammonium and PEG-like side chains. Ring opening copolymerization of 3-((4-bromobutoxy)methyl)-3-methyloxetane (BBOx) and 3-((2-(2-methoxyethoxy) ethoxy) methyl)-3-methyloxetane (ME2Ox) yielded random …
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Dipeptide nanotubes for biomedical applications
… characteristics and their biomedical efficacy. To this end, a small library of FF and FF analogues were synthesised (NH<sub style="color: rgb(32, 31, 30); font-family: Calibri, Helvetica, sans-serif;">2</sub>-FF-COOH, NH<sub style="color: rgb(32, 31, 30); font-family: Calibri, …
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