Global ETD Search
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Showing 1 to 20 of 62 for “"Bacteriocin"”.
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Potential of bacteriocin producing bacteria to control VRE infection
… need to develop therapeutic alternatives. Bacteriocins, small ribosomally synthesised peptides, have been proposed as one such alternative. Bacteriocins are non-toxic to producer strains and have been shown to exhibit antimicrobial ability against multi-drug resistant species including VRE …
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An investigation into novel bacteriocin producers isolated for shelf life extension of dairy products
… peptides, and antimicrobial peptides known as bacteriocins which affect the product and the consumer are described. Chapter 2 outlines the production and techno-functional characterization of yoghurt produced using milk derived from different diets, perennial ryegrass (GRS) and total mixed …
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The influence of bacteriocin-producing probiotic starter cultures on fermentation time and post-acidification in yoghurt
The main objective of this study was to use bacteriocin producing Lactobacillus acidophilus strain LA-5 for the in situ lysis of Lactobacillus delbrueckii subsp. bulgaricus for reducing fermentation time, enhancing viability and survival of probiotic bacteria in fermented dairy foods, and for …
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An in silico analysis of bacteriocin production in the human microbiota and its relationship with health
… of antimicrobials with this potential is the bacteriocins – antimicrobial peptides produced by many lineages of bacteria that kill or inhibit the growth of specific competitors. This thesis focuses primarily on the first step toward harnessing the bacteriocin-producing capacity of the human …
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The structure of trifolitoxin : A bacteriocin from Rhizobium leguminosarum biovar trifolii strain T24 / by Benjamin James Lethbridge.
… biochemical and chemical characteristics of a bacteriocin produced by Rhizobium leguminosarum biovar trifolii Strain T24 (trifolitoxin). A stable biological active derivative of trifolitoxin has been purified by reverse phase chromatography, gel filtration and high voltage paper …
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Molecular genetic studies of bacteroides fragilis
… have been successfully investigated. Firstly the bacteriocin produced by the B.fragilis BF-1 strain was purified and partially characterized. This bacteriocin was found to be cell bound and constitutively produced by the bacteria. The purified bacteriocin was a protein with an apparent Mr of …
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Elimination of Listeria monocytogenes in a Soft Cheese, Fromage Blanc, Using Processing Methods, Formulation Changes, and Additive Bacteriocin Nisin
… instead of 22oC), addition of the anti-listerial bacteriocin nisin (Danisco Nisaplin) in formulation at different levels (125 ppm, 250 ppm, 400 ppm), and combinations of these treatments. Characteristics including pH, fat content, protein content, and color were evaluated for each treatment …
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Coexistence of paralogous quorum sensing systems leads to diverse network topology for coordinating competence and bacteriocin biosynthesis in cariogenic streptococci
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2024-05-01
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Harnessing the bacteriocin-producing capacity of the gut with a view to controlling microorganisms that have been associated with obesity and related metabolic disorders
… The aim of this project was to (1) harness the bacteriocin-producing capacity of the gut and (2) develop a bacteriocin-producing probiotic that can contribute to the prevention/treatment of obesity and related metabolic disorders. Firstly, bacteriocin production among a selection of commercial …
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Discovery and evaluation of novel and characterised bacteriocins for future applications
Bacteriocins are a heterogeneous group of small, ribosomal-synthesised, antimicrobial peptides produced by bacteria, capable of inhibiting bacteria both closely related or indeed those from other genera than the producer. These peptides are often active in the nanomolar range making them highly …
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Evaluation of Prebiotic Fibers and Pectin on Probiotic Strains and Effect of Bacteriocin-like Substance on the Survival of Listeria Monocytogenes
… acid or other antibacterial substance (eg: bacteriocin). Therefore, the objective of this research is to study the fermentability of fructooligosaccharides (FOS), galactooligosaccharides(GOS), inulin agave (IA), high methoxy pectin (HMP), and low methoxy pectin (LMP) with three strains of …
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A deadly hug : contact-dependent killing by Caulobacter crescentus, via cell surface-associated glycine-zipper proteins
… or delivered in a contact-dependent manner. Bacteriocins are one ubiquitous type of such antimicrobials, and collectively constitute a very diverse group of ribosomally-synthesized diffusible proteinaceous toxins. The majority of well-characterized bacteriocin systems belong to a limited …
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Identification et caractérisation de bactériocines produites par deux bactéries lactiques (Enterococcus faecium CWBI-B1430 et Enterococcus mundtii CWBI-B1431) isolées à partir de fromages frais artisanaux péruviens
A screening of lactic acid bacteria (LAB) with bacteriocin-like inhibitory activity against Listeria monocytogenes was performed. The screening was conducted in 27 traditional artisanal-produced cheeses obtained from different Peruvian regions. Two thousand two hundred and seventy seven strains …
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Computational Insights into the Antimicrobial Mechanism of Action of Class II Bacteriocins.
… including discovery of alternative drugs. Bacteriocins are bacteria-produced, antimicrobial peptides that are potentially powerful antibiotic drug candidates. Despite considerable scientific interest around bacteriocins, and despite their promise as potent, latent antibiotics, their …
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Structural and Biochemical Studies of Nisin *Biosynthesis and Autoimmunity
The lantibiotic nisin is a 34-residue bacteriocin produced by the Gram-positive bacteria Lactococcus lactis spp. It is first ribosomally synthesized as an inactive precursor which is then post-translationally modified into its mature biologically active form. Described herein is a two-part study …
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Multiscale modeling of microbial communities
… in shaping the outcome of competition between a bacteriocin (i.e. toxin) producing and sensitive strain. In natural systems, bacteriocin production is often conditional, governed by underlying quorum sensing regulatory circuitry. By developing an ordinary differential equation (ODE) model …
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Detección y caracterización de péptidos con actividad antimicrobiana en aislados de Staphylococcus. Aplicación al ámbito agroalimentario y en salud pública
Bacteriocins have been considered an effective tool to address the problem of antibiotic resistance. Staphylococcus is normally found as commensal microorganisms of the nasal and skin microbiota of animals and humans, although some species can be opportunistic pathogens, especially S. aureus. …
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Identification and characterisation of lactic acid bacterial secondary metabolites with functional and health benefits
… application. In Chapter Five the properties of a bacteriocin produced by Streptococcus gallolyticus LL009 were examined. LL009 was one of the high EPS producing strains identified in an earlier chapter. Gallocin D is a narrow spectrum two component bacteriocin with potent activity against …
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Identification and characterization of beneficial microbiota in beef biltong from Namibia Central regions
… and, profiling LAB isolates for enzymatic and bacteriocin activities. Beef biltong is produced by a dry curing process. Its average pH ranged from 5.1±0.15 to 5.98±0.16, average sodium chloride content ranged from 3.16±0.62 to 3.98±0.86 g/100g, the average moisture content ranged from …
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