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 21 for “"bacterial fermentation"”.
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Biopolymer production through bacterial fermentation using circular economy approaches
L'abstract è presente nell'allegato / the abstract is in the attachment
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Genetic Manipulation and Characterization of Solvent-Producing Clostridia
… formulation of a new solventogenic clostridial fermentation medium based on the use of corn steep liquor (CSL). CSL is a by-product of the corn wet-milling industry, and has been used primarily as a feed supplement in the livestock industry. This nutrient-rich medium is an ideal base for use in …
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Development of antibacterial Polyhydroxyalkanoates for their use in nerve tissue engineering
… (PHAs), linear bio-polyesters derived from bacterial fermentation process with biocompatible and biodegradable properties. PHAs are divided into two categories, according on the number of carbon atoms in a monomer unit: short chain length (scl) and medium chain length (mcl). Depending on the …
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Fermentation of resistant starch: implications for colonic health in the monogastric animal.
… being maintained by the production of SCFA. The fermentation of carbohydrates within the colon is beneficial to the health of the gut, as the beneficial bacterial species such as Lactobacillus and Bifidobacterium spp. are maintained, and a low pH reduces the activity of potentially harmful …
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SHORT-CHAIN FATTY ACIDS INDUCED AUTOPHAGY SERVES AS AN ADAPTIVE STRATEGY FOR RETARDING MITOCHONDRIA-MEDIATED APOPTOTIC CELL DEATH
… fatty acids are the major by-products of bacterial fermentation of undigested dietary fibers in human large intestine. SCFAs, mostly propionate and butyrate, inhibit proliferation and induce apoptosis in colon cancer cells, but clinical trials had mixed results regarding the anti-tumor …
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Removal of Cyanogenic Glycosides in Whole Flaxseed via Lactobacillaceae Fermentation
… over 72 h for both bench-scale and scale-up bacterial fermentation experiments. The consortium culture was largely from members of the family Lactobacillaceae. Furthermore, fatty acid composition remained unchanged during fermentation, while concentration of flaxseed oil and SDG significantly …
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An investigation of the effects of diet on the gastrointestinal microbiota, inflammation, and metabolic endotoxemia in adults
… of the gastrointestinal (GI) microbiota and bacterial fermentation end-products, GI barrier structure and function, and the enterohepatic circulation of bile acids. One of the mechanisms by which consumption of dietary fibers may contribute to decreased whole-body inflammation is through the …
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Digestive metabolism of glucosinolates: a novel approach using urinary markers for estimating the release of glucosinolate breakdown products in the gastro-intestinal tract of mammals.
… the relative influence of plant and bacterial myrosinase on isothiocyanate production was quantified in rats. A proportion of 0.80 (s.e.m. 0.076) of benzyl glucosinolate was hydrolysed to isothiocyanate by plant myrosinase. In the presence of both plant and microbial activity,, the …
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Antibiotic-free PHA-based antibacterial materials for bone regeneration
The current world problem of antibacterial resistance to antibiotics has driven the need to develop new therapeutics as alternatives to antibiotic to prevent and fight infections. In the biomedical field, bone regeneration is one of the applications with the highest risk of infection. Therefore, …
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A Modified Prill and Hammer Method Used in The Study of Diacetyl Production by Single Strain Lactic Streptococci
… past the diacetyl found in butter resulted from bacterial fermentation of the cream before churning. In recent years commercial lactic cultures have been used, which are added to the fat granules before ''working" of the butter. Bacterial cultures used by the dairy industry generally consist of a …
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Studies in beta cells and adipocytes in the context of obesity and T2D - focusing on PDE3B, OPN and SCFAs
… fatty acids (SCFAs), produced through bacterial fermentation of dietary fibers, on glucose and lipid metabolism in adipocytes. We show that the SCFAs propionic acid and butyric acid inhibit cAMP-stimulated lipolysis, a mechanism that is not dependent on the cAMP-degrading enzyme PDE3B. …
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Improved Polyhydroxyalkanoate Production from Selected Volatile Fatty Acids using Cupriavidus necator
… of the PHA production process by pure culture bacterial fermentation using Cupriavidus necator. Optimisation strategies involved the following investigations using shake flasks and 5 litre based batch fermentations:<br/><br/>Shake flask investigations determined that the temperature of 30oC and …
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The bacteriome and metabolome of human breast milk and their association with infant growth
… of its composition, especially the bacteriome (bacterial communities) and metabolome (complete set of metabolites), and their relationship to infant health and growth have not yet been comprehensively characterized. This is particularly true in low- and middle-income countries. We therefore …
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Studies into the relationship between GPCR43 and BuA-induced effects on colorectal cancer.
… until it reaches the colon. Here it undergoes bacterial fermentation to produce the short chain fatty acids (SCFAs) acetate, propionate and butyrate (BuA). Each of the SCFAs are bioactive in the colon, with the most active being BuA. The beneficial effects of fibre have been linked to BuA’s …
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The Modulating Effects of Dietary Fiber and Short-Chain Fatty Acids on Enterocyte Differentiation, Maturation and Turkey Coronavirus Infection
… lumen. These compounds are by-products of the bacterial fermentation of dietary fiber and serve as the primary energy source for enterocyte metabolism. The overall objective of this dissertation was to evaluate the effects of dietary fiber and short-chain fatty acids on enterocyte …
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Influence of intestinal inflammation on bacterial protein expression in monoassociated mice
… mice had lower caecal concentrations of bacterial fermentation products than the control mice. Differentially expressed proteins also included the Fe-S cluster repair protein NfuA, the tryptophanase TnaA, and the uncharacterised protein YggE. NfuA was upregulated nearly 3-fold in both E. …
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Elucidating mechanisms of toxicity and engineering Escherichia coli for tolerance of short chain fatty acids
… of short chain carboxylic acids during bacterial fermentation is described. This work offers new insights into carboxylic acid toxicity and methods for improvement of microbial tolerance that is important for improving productivity, titer, and yields for economical production of …
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Biosynthesis of polyhydroxyalkanoates, their novel blends and composites for biomedical applications
… 4-, 5- and 6- hydroxyalkanoic acids produced by bacterial fermentation in a nutrient limiting conditions with excess carbon. They can be produced easily using renewable carbon sources. They are biodegradable and biocompatible in nature. Their physical properties are highly tailorable and a range …
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AGRONOMIC AND ECO-PHYSIOLOGICAL RESPONSES OF BRASSICACEAE SUBJECTED TO BIOSTIMULANT TREATMENT AND ABIOTIC STRESS
… of a biostimulant prototype, obtained from bacterial fermentation of sugarcane. Two distinct trials were designed to investigate the efficacy of counteracting the adverse effects of heat stress: in the first trial, the aim was to establish the possibility of a priming effect by applying a …
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Nerve tissue engineering using blends of Polyhydroxyalkanoates
… and 6-hydroxyacids, synthesized by a variety of bacterial species. They can be produced from renewable carbon sources, they are biodegradable, biocompatible and exhibit thermoplastic and elastomeric properties. Therefore, PHAs are a potential substitute for petroleum-derived plastics and have a …
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