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 30 for “"FNR"”.
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Regulation of nitrogen fixation in <i>Klebsiella pneumoniae</i>: The role of Fnr in oxygen signal-transduction
… konnten wir zeigen, dass in einer K. pneumoniae fnr null Mutante NifL das Signal für Sauerstofflimitierung nicht erhält, was zu einer inhibitorischen Konformation des Proteins führt. Dies bedeutet, dass Fnr, indirekt oder direkt, in diese Signalübertragung involviert ist. Wir nehmen an, dass Fnr …
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Genetic analysis of RNA polymerase/transcriptional activator interactions at thepepT promoter of S. typhimurium
… activation by the global regulatory protein FNR has been investigated using a genetic approach. We have identified five rpoA mutations which decrease the FNR-dependent anaerobic induction of the pepT gene of S. typhimurium. Each of these mutations (G311E, G311R, L289F, R317H, W320ter) affects …
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Observing flow using fast neutron radiography and positron emission particle tracking
… has been studied using fast neutron radiography (FNR) and positron emission particle tracking (PEPT). A new fast neutron imaging system was commissioned at The South African Nuclear Energy Corporation, Pretoria, as part of this study, although FNR measurements were ultimately performed at …
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The regulation of genes of unknown function implicated in nitrosative stress tolerance in Escherichia coli K-12
… positively regulated by NarL independently of FNR, the master regulator of anaerobic respiration. Biochemical and genetic analyses presented in this study confirmed that expression from both the \(yeaR\) and \(ogt\) promoters is dependent upon NarL, which binds to a single site in the \(yeaR\) …
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Contributions to Ensembles of Models for Predictive Toxicology Applications. On the Representation, Comparison and Combination of Models in Ensembles.
… such as Accuracy (Acc), False Negative Rate (FNR) and False Positive Rate (FPR). The cost function will ensure that only quality models be selected as the candidate models for an ensemble. The proposed algorithm for optimisation and combination of Acc, FNR and FPR of ensemble models using …
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Architecture of Escherichia coli promoters that respond to reactive nitrogen species
… of the hcp and ogt genes, namely NarL / NarP, FNR and NsrR. Transcription activation by NarL was then studied using semi-synthetic promoters. The hcp gene was found to be positively regulated by FNR and negatively regulated by NsrR. Contrary to previous reports, NarL and NarP were found to have …
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An Analysis of the Effectiveness of Emergency Locator Transmitters to Reduce Response Time and Locate Wreckage in U.S. General Aviation Accidents
… ELT Success Rate (ESR) and False Negative Rate (FNR) based on ELT-Aided. This study found a significant difference between ELT-Operated and ELT-Aided. The ESR was found to be 38.58% whereas the FNR was found to be 61.42 %. The Missing Data Ratio (MDR), where accident reports had no ELT …
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The regulation of denitrification in P. denitrificans
… highly expressed genes were co-regulated by CPR/FNR type transcriptional regulators. Motif analysis of the upstream region showed similar patterns recognizable by FNR. P. denitrificans expresses three FNR type regulators that could potentially compete for cognate site binding. Three mutant …
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Discovery of a DNA-binding Consensus and Potential Genomic Regulatory Binding Sites for the Thermus thermophilus HB8 Transcriptional Regulator TTHA1359
… and fumarate and nitrate reduction regulator (FNR) proteins compose the CRP/FNR superfamily of TFs, a diverse subgroup of TFs in bacteria which regulate various gene expression programs. In the present work, a reverse-genetic technique involving the combinatorial selection technique Restriction …
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Regulation of nitrogen fixation in Klebsiella pneumoniae: NifL, one protein transducing two environmental signals to the nif-transcriptional activator NifA
… untersucht. In Stämmen beider Organismen mit fnr-Deletionen konnte die Inhibierung von NifA durch NifL nicht durch Abwesenheit von Sauerstoff dereprimiert werden. Diese Phänotypen konnten durch die Synthese von Fnr in trans komplementiert werden. Fnr scheint also, direkt oder indirekt, an der …
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Aplicación de Analytics en la Gestión Pública Caso de Estudio: Fondo Nacional de Recursos
… en la operatoria del Fondo Nacional de Recursos (FNR), institución uruguaya de carácter público dedicada a brindar coberturas financieras vinculadas a la salud.
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Understanding the Effects of Higher-Order Assembly on the Structure of Sulfite Reductase
… domain interrupting FAD/NADPH bind- ing FNR (Ferredoxin/NADP+ reductase)-like-domain and a flexible linker connecting Fld and FNR domains. This flexible linker is ∼ 30 amino acids long and remains crucial for transferring electrons from one domain to another. SiRHP is a metal-harboring …
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Empirical study and business model analysis of successful freemium strategies in digital products
… sensitivity of 67.6%, false negative rate (FNR) of 32.4% and Area under the curve (AUC) of 0.7474937. On fine-tuning the penalty matrix, FNR is reduced to 22% and sensitivity increased to 78% with an accuracy of 65.8%. The empirical study showed that age (demographic factor), playcount …
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Superoxide Toxicity in Escherichia Coli
… by RpoS in stationary phase, is repressed by Fnr and ArcA anaerobically, and is repressed when copper is unavailable. Mutants of sodC in E. coli and S. typhimurium suffer damage during aerobic growth from a cellular source of superoxide. The unknown damage sensitizes the mutants to subsequent …
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Being Human: Fine-Tuning Moral Naturalism
… I suggest that formal non-romanticism (FNR) provides a way of grounding moral requirements which is naturalistic but which does not depend on the provision of a theory of human nature. On this view, moral necessities are sui generis and are grounded in an awareness of the presence of …
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The transcription factor, fixK, plays a central role in carbon source metabolism and cellulose synthesis in Komagataeibacter species
… source utilization and the role that a Crp/Fnr transcription factor, FixK, plays in bacterial cellulose biosynthesis. Extracellular proteins secreted by Komagataeibacter were assayed for degradative activity against plant cell wall compounds. Mutagenesis of fixK, previously associated with …
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Oxygen Regulated Genes in Salmonella Typhimurium
… oxd-2 expression was affected by mutations in fnr, hip (IHF), crp, lrp, ackA or pta. NMR analysis of the cultures of a wildtype strain, grown anaerobically in a medium containing threonine, aspartate, leucine and casamino acids, showed that S. typhimurium produced propionate from threonine.
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Ethylene response and phytohormone-mediated regulation of gene expression in Komagataeibacter xylinus ATCC 53582
… is reported and a phytohormone-regulated CRP/FNR transcription factor was identified that may influence K. xylinus cellulose biosynthesis. Based on evidence provided in this thesis, the classification of K. xylinus as a saprophyte and its potential to accelerate fruit ripening in nature is …
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HcpR of Porphyromonas gingivalis utilizes heme to bind NO
… such stress remain poorly understand. HcpR is an FNR-CRP family regulator that has been implicated in regulation of the nitrosative stress response. In this study we characterize the biochemical properties of HcpR. It is a homo-dimer that is composed of 3 domains – a heme-binding domain, …
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Geometry, evolution and scaling of fault relay zones in 3D using detailed observations from outcrops and 3D seismic data
… array (here termed “fault-normal rotation”, or “FNR”) – to be quantitatively analysed around imaged faults. The new utility can be applied to any 3D surface and was used to analyse centimetre-scale to kilometre-scale fault-arrays, interpreted from laser scan point clouds, digital elevation …
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