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- 3Lactobacillus reuteri
- 2Escherichia coli
- 1Acid resistance
- 1Amino acid based acid resistance
Results for "supervisors_tesim:"Gänzle, Michael (Agricultural, Food, and Nutritional Science)""
Lactobacillus reuteri is a common organism in cereal-based foods and a gut symbiont in humans and animals, yet the molecular mechanisms allowing its persistence in various niches are not well understood. L. reuteri LTH2584 produces reutericyclin and persists in industrial sourdoughs, where acidic...
Isomalto-oligosaccharides (IMO) with α(1→6) and α(1→4) glucosidic linkages are produced by enzymatic conversion of starch. Isomalto-oligosaccharides are partially digested in the intestine but little information is available regarding their metabolim in vivo. It was the aim of this study to...
Genomic and phenotypic comparison of Lactobacillus reuteri isolates from food and intestinal ecosystems provides insights to probiotic applicationsDownload
Some of the food fermenting lactobacilli are derived from the animal intestine. Lactobacillus reuteri provides a model organism to study molecular mechanisms of ecological adaptation from gut to food. The overall objective of this dissertation was to characterize ecological fitness of L. reuteri...
Inactivation of Saccharomyces cerevisiae and Candida humilis in Potassium Phosphate Buffer by Pulsed Electric FieldsDownload
Pulsed electric field (PEF) is a promising athermal food preservation technology, having the potential to provide a better balance between food safety and food quality. But the high cost of PEF treatment has limited the commercial application of this technology. The aim of this MSc thesis...
Lactic acid bacteria produce glycans that may be applied in food and pharmaceutical industries as prebiotics, food additives, to prevent pathogen adhesion, or to modulate the host immune system. The recent identification of the structure of galacto-oligosaccharides (GOS) preparations demonstrates...
Microbiological and chemical characterisation of ting, a sorghum-based gluten-free fermented cereal product from BotswanaDownload
Fermented cereal foods produced in Africa involve a wide range of raw materials, e.g. millets, sorghum and maize, which are fermented using various microorganisms. Fermentation of these foods progresses under the influence of microorganisms and their enzyme activities. Fermentation processes...
Strains of Escherichia coli may survive heat or pressure stress, acquire specific virulence genes and cause severe human diseases. The locus of heat resistance (LHR) has been identified as an important heat resistant element in E. coli. The objective of this thesis was to explore the role of the...
Lactobacilli are commonly used in food fermentations. Preservation and changes in food quality due to fermentation arise because of the growth, metabolism and enzymatic activity of these organisms. Enzymatic pathways of lactobacilli can also be exploited for the production of bioactive...
The use of crude cell extracts of lactic acid bacteria optimized for beta-galactosidase activity to form galactooligosaccharides with lactose, mannose, fucose, and N-acetylglucosamineDownload
Several lactic acid bacteria contain β-galactosidases. Beta galactosidases catalyze lactose hydrolysis and transfer acceptor sugars onto galactose, producing galactooligosaccharides. The aim of this work was to exploit β-galactosidases of lactic acid bacteria as crude cell extracts to produce...
Pathogenic fungi cause significant yield losses and quality reductions to major crops including wheat, canola, and barley. Toxic metabolites produced by some phytopathogenic fungi also pose significant risks to animal and human health. Extensive application of synthetic fungicides is not a...