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 23 for “"gastrointestinal tract (GIT)"”.
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Gastrointestinal tract (GIT) symptons in Ironman triathletes : a study relating GIT symptons to changes in splanchnic blood flow
Gastrointestinal tract (GIT) symptoms commonly affect endurance athletes such as those competing in the Ironman Triathlon. Although a number of risk factors and the pathophysiological mechanisms for the development of GIT symptoms during exercise have been proposed, scientific evidence in support …
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THE GUT MICROBIOTA OF A WILD AMERICAN BLACK BEAR (Ursus americanus) POPULATION
… mutualistic microbial communities located in the gastrointestinal tract (GIT), has co-evolved in vertebrates to perform micro-ecosystem services to facilitate physiological functions. Despite the key role of the GMB in host health, wildlife managers have been slow to consider the ramifications of …
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The development of probiotics for use in the ostrich farming industry in South Africa
… about the microorganisms inhabiting the ostrich gastrointestinal tract, however they do play an important role in humans and animals and disturbance of this community can be fatal. It has been established that probiotic bacteria such as Lactobacillus and Bifidobacterium spp. play an important …
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Oral uptake and distribution of microspheres
… of experimental evidence suggesting that the gastrointestinal tract (GIT) may be penetrated by sub-micron sized polymeric particles which have the capacity to deliver therapeutic compounds. We investigated this, initially with Fluoresbrite™ carboxylate latex microspheres (0.87 m diameter) …
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Effect of a Fermented Yeast Product on the Gastrointestinal Tract Microbial Diversity of Weaned Pigs Challenged With Salmonella Enterica Typhimurium Dt104
Gastrointestinal tract (GIT) microorganisms play important roles in animal health, including providing energy and vitamins, improving the host immune response and preventing pathogenic microorganisms from colonizing. Prebiotic feed supplementation offers an alternative to antimicrobial growth …
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An in vitro assessment of the effects of feed-grade trace minerals on commercial phytase activity
… effect of pH changes, reflective of the poultry gastrointestinal tract (GIT), on the activity of a 3- and 6-phytase in the presence of mineral mixes was assessed. Once again, OTMs had greater enzyme retention for both phytases. Unlike the 3phytase, 6-phytase was dependent on pH, again emphasising …
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Microplastics as Contaminant Vectors: Influencing the Bioaccessibility of Naphthalene from Freshwater
… (PAHs), from freshwater systems to the human gastrointestinal tract (GIT). The focus was on characterizing the sorption mechanisms of naphthalene and its bioaccessibility (i.e., an estimate of the fraction of an ingested dose that becomes soluble in gastro-intestinal fluids). Three types of …
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Neuroendocrine neoplasms of the digestive tract: retrospective classification according to the 2019 WHO grading system, and evaluation of the immunohistochemical marker INSM1
Neuroendocrine Neoplasms (NENs) of the Gastrointestinal Tract (GIT) are a heterogeneous group of tumours with varied biologic potential and clinical outcomes. They are classified as well differentiated neuroendocrine tumours (WD NET) or poorly differentiated neuroendocrine carcinomas (PD NECs) …
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Movement of plasma free, erythrocyte free, peptide and serum protein amino acids across the gastrointestinal tract and liver of calves
… differences were quantified across the gastrointestinal tract (GIT) and liver of growing calves during a "steady state" and fasting metabolism. Six Holstein steer calves (136 kg) surgically equipped with cannulae in the aorta, portal vein and hepatic vein were maintained under constant …
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An evaluation of nutraceutical components of syzygium cordatum fruits for the treatment of gastrointestinal tract infections
Gastrointestinal tract (GIT) infections represent high morbidity and mortality rates worldwide annually due to malnutrition, microbial drug resistance and newly emerging GIT infections. Although the pharmacological activities of different parts of Syzygium cordatum have previously been determined, …
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Insights Into Determinants That Contribute to Colonization, Virulence and Antibiotic Resistance In Enterococci
… of this dissertation focused on the dynamics of gastrointestinal tract (GIT) colonization of the three known <em>E. faecium</em> clades. This work found that clade B, composed of strains that are part of the normal human microbiota, outcompeted most of the clade A strains, which include strains …
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Ultrastructure and function of the gastrointestinal tract in marine herbivorous fishes
The structure of the gastrointestinal tract (GIT) of temperate and tropical marine herbivorous fishes was described using histological and ultrastructural approaches. Radial distribution of endosymbiotic microbiota in the hindgut, and the association of microbiota with degradation of algal …
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The analysis of genetic aberrations in South African oesophageal squamous cell carcinoma patients
… 2017 indicate that 20% of cancers globally are gastrointestinal tract (GIT) cancers, with oesophageal cancer being the 8th most common cancer. Oesophageal squamous cell carcinoma (OSCC) occurs in the upper to mid oesophagus and is present at high incidence in developing countries including South …
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Molecular Characterisation Of Clostridium Perfringens Isolates From Patients At Groote Schuur Hospital
… caused, when the organisms disseminate from the gastrointestinal tract (GIT) of human carriers to the rest of the body. South Africa (RSA) lacks published data on the specific strains and toxin types responsible for human clostridial infections, as only identification and drug susceptibility …
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Mechanistic insight into the role of dietary fibers and short chain fatty acids in the regulation of metabolism and inflammation in the pig
… multiple functions as it passes through the gastrointestinal tract (GIT). Besides the influence on nutrient digestibility, dietary fiber affects growth performance and host metabolism via modulation of gut microbial community structure and production of short chain fatty acids (SCFA). A …
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Evaluation and Selection of a Bacillus based Direct-Fed Microbial Candidate for In situ Enzyme Production to Improve Gut Health Integrity, Bone Quality and Growth Performance in Poultry
… practice to reduce the incidence of bacterial gastrointestinal diseases. Therefore, the objectives of the present dissertation were to evaluate and select different Bacillus spp. strains as DFM candidates based on enzyme production profiles to improve nutrient absorption and intestinal …
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Dairy ingredients-based emulsions and beta-carotene delivery
… size. After passing through the simulated gastrointestinal tract (GIT) digestion, initial droplet size significantly influenced the emulsion properties (e.g., droplet size and distribution and surface charge), but did not significantly affect the bioaccessibility and cellular uptake of …
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Polysaccharide utilization by the human colonic bacterium, bacteroides intestinalis DSM 17393
The human gastrointestinal microbiome has co-evolved with the host for an extended period, generating an intrinsic metabolic network capable of modulating both the microbial community and host physiology. Changes in the gut environment shape the microbial community with one of the main driving …
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Functional analysis of insulin-like growth factor binding protein -4 and -6 in transgenic mice
… in the luminal contents of other segments of the gastrointestinal tract (GIT), nor in tissue extracts of all GIT segments. Glucose homeostasis was not altered by IGFBP-6 expression. Postnatal body and organ growth was not affected in transgenic mice, except for the absolute and relative weight and …
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Probiotic metabolism of human milk oligosaccharides (HMOs) and prebiotics
… the growth of bifidobacteria in the infant gastrointestinal tract (GIT). In this study, the first aim was to investigate the probiotic metabolism of HMOs and HMO precursors. Growth parameters were determined by inoculating glucose-grown cultures into basal deMan Rogosa Sharpe (MRS) (no added …
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