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 16 of 16 for “"Obligate anaerobe"”.
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Molecular analysis of oxygen toxicity in the obligate anaerobe Roseburia cecicola: Isolation of a compound that degrades DNA when exposed to oxygen
… Roseburia cecicola. This organism is a strict anaerobe whose growth is inhibited when exposed to oxygen.
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Effects of far ultra-violet radiation and oxygen on macromolecular synthesis and protein induction in Bacteroides fragilis Bf-2
… on macromolecular synthesis and viability in the obligate anaerobe, Bacteroides fragilis, as well as the specific proteins induced in this organism by these different DNA damaging agents.
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The cloning and characterisation of an endoglucanase and an endoxylanase from Clostridium acetobutylicum in Escherichia coli
… P262 is an endospore forming Gram-positive obligate anaerobe which has been used for the industrial production of acetone and butanol. Strains of C. acetobutylicum have been reported to exhibit some activity towards cellulosic and hemicellulosic substrates. The aim of this thesis was to …
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Analysis of genes and enzymes involved in the degradation of hemicellulose and cellulose by Butyrivibrio fibrisolvens H17c
B. fibrisolvens H17c is a Gram-positive obligate anaerobe which has been found in the rumen of most ruminants. Strains of B. fibrisol vens have been reported to exhibit activity toward cellulosic and hemicellulosic substrates. The aim of this thesis was to screen a genebank of B. fibrisolvens H17c …
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HcpR of Porphyromonas gingivalis utilizes heme to bind NO
The obligate anaerobe Porphyromonas gingivalis is the etiological agent responsible for periodontal disease. It must withstand high levels of reactive nitrogen species in the oral cavity generated by the host and other oral flora. The mechanisms allowing for protection against such stress remain …
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Glutamine synthetase in Bacteroides fragilis
… fragilis is a gram-negative, non spore-forming, obligate anaerobe of the human intestinal microbiota. It is, however, an opportunistic pathogen and has been ranked as the most prevalent isolate in cases of anaerobic septicaemia. Similar to most bacteria, ammonium is assimilated in B. fragilis …
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The Role of Collagen Interacting Proteins in the Pathogenesis of Filifactor alocis
… alocis is a Gram-positive, asaccharolytic; obligate anaerobe that has emerged as a potential periodontal pathogen due to its presence in high numbers in patients who have periodontal disease and least detection in healthy individuals (Kumar et al., 2003, Kumar et al., 2006, Wade, 2011). …
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The characterization of Clostridium beijerinckii NRRL B592 cells transformed with plasmids containing the butanol-production genes under the control of constitutive promoters
Clostridium beijerinckii is a spore-forming, obligate anaerobe that is capable of producing butanol, acetone and isopropanol. These industrial chemicals are traditionally known as solvents. The regulation of solventogenic fermentation is linked to the onset of sporulation, so that by the time the …
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The regulation and two genes in Bacteroides thetaiotaomicron starch utilization system
Bacteroides thetaiotaomicron, a gram-negative obligate anaerobe, appears to utilize starch by first binding the polymer to its surface, then translocating it into the periplasmic space. Several genes have been identified that encode enzymes or outer membrane proteins involved in starch utilization. …
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Struktur und Funktion von Fermentierern und Methanogenen in einem sauren Niedermoor
… (i) abundante fakultativ aerobe und/oder obligat anaerobe Fermentierer, (ii) Xylose- und Glucose-verwertende Fermentierer, (iii) Intermediate im Kohlenstofffluss zu Methan und (iv) aktive gemäßigt säuretolerante Archaea in einem nördlichen temperaten, sauren Niedermoor zu identifizieren. Die …
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Investigating the transcriptional regulation by OxyR in Porphyromonas gingivalis.
… bacterium is of significance. This gram negative obligate anaerobe, being aerotolerant, manages to survive inside the oral cavity, where oxidative stress is ubiquitous. Genome sequence of P. gingivalis shows the presence of a transcriptional regulator OxyR which is a homologue of OxyR present in …
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Oxidative stress in anoxic habitats
… of oxidative stress endured by a facultative anaerobe (Escherichia coli) and an obligate anaerobe (Bacteroides thetaiotaomicron). E. coli lives adjacent to the epithelia in mammalian intestines. The encounter of oxygen penetrating from the epithelial layer and the reduced molecules like H2S …
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Role and regulation of glutamate dehydrogenase activity in Bacteroides fragilis bf1
Bacteroides fragilis is a gram-negative obligate anaerobe that exists normally in the human large intestine. It is, however, capable of causing a variety of infections once outside of this environment. Previous studies have suggested that the regulation of the ammonia assimilatory pathways in B. …
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Sulfite reductase and thioredoxin in oxidative stress responses of methanogenic archaea
… an end-product of their metabolism. These obligate anaerobes belonging to the archaeal domain inhabit diverse anoxic environments such as rice paddy fields, human guts, rumen of ruminants, and hydrothermal vents. In these habitats, methanogens are often exposed to O₂ and previous studies …
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Development of a Genetic Modification System in <i>Clostridium scatologenes</i> ATCC 25775 for Generation of Mutants
3-Methyl indole (3-MI) is a malodorant in food and animal waste and <i>Clostridium scatologenes</i> ATCC 25775 is the model organism for the study of 3-MI production. 3-MI is an anaerobic degradation product of L-tryptophan and can cause pulmonary disorders and death in cattle and goats. To …