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 “"Flavins"”.
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Binding Affinity of Flavins to the Dehydrogenase Domain of SpNOX
… this study, we examine the binding affinity of flavins (FAD, FMN, and riboflavin) to the DH domain of NOX.</p>
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Electronic spectroscopy of flavins in a cryogenic 22 - pole ion trap
Flavins are of great biological relevance, but little information is known about the isolated flavins. This dissertation deals with the electronic photodissociation spectroscopy of cryogenically cooled flavins. The optical spectra are recorded with a tandem mass spectrometer coupled to a cryogenic …
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Excited state charge redistribution and dynamics of flavins, flavorproteins, and their cofactors
… experiment that found the absorption spectrum of flavins in this redox state arises from two distinct electonic transitions in the visible/near-ultraviolet spectral range, a fact that has not been incorporated into the analysis of many ultrafast spectroscopic experiments of reduced anionic …
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Photochemistry, photophysics and spectroscopy of redox states of flavins relevant to photoactive flavoproteins
… has been a tremendous interest in the study of flavins and their derivatives in order to gain information valuable for designing model compounds that can mimic the functions of flavoenzymes. This thesis aims a) to explore and enhance the knowledge about the behavior of the flavin cofactors in …
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Dan Flavins installations in fluorescent light im Kontext der Minimal Art und der Kunstlicht-Kunst
… werden. Das erste Kapitel widmet sich Dan Flavins Kunst allgemein. Unterschiedliche Zugangsweisen führen an die Kunst heran: die Beschreibung der Kunsterfahrung anhand zweier Originale, die Vorstellung der ersten künstlerischen Arbeiten Ende der fünfziger und Anfang der sechziger Jahre, die …
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The Mechanism of Oxygen and Nitric Oxide Toxicity in Escherichia Coli
… of NADH accelerates the reduction of free flavins by flavin reductase, and these reduced flavins drive Fenton chemistry by tranferring electrons to free iron. The possibility that H2O2 and NO synergize when macrophages attack captive bacteria is discussed.
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The Synthesis of a Homologous Series of Alkyl Lumazines and their Application to the Dispersion of Carbon Nanotubes
… lumazines were less diameter-selective than the flavins, they still appeared to favor smaller-diameter tubes (<1 >nm) as compared to the <strong>FC<sub>12</sub></strong>. The helix formed by <strong>FC<sub>12</sub></strong> on the surfaces of SWNTs is shown to be preserved in …
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Quantenchemische und molekulardynamische Untersuchungen zur Photoanregung von Riboflavin
… Enzymfamilien. Eine biologische Aktivität des Flavins führt über einen elektronisch angeregten Zustand, wo dann, abhängig von der Aminosäureumgebung, ein bestimmter Mechanismus zu einem biologischen Prozess führt (Photozyklus). Ein wichtiges Analysetool zum Verständnis des anfänglichen …
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Green tea antioxidants inhibition of oxidation and mutation
… several major potent antioxidants e.g., flavins and/or polyphenols. These antioxidants in green tea may react directly or indirectly with strong oxidizers e.g. peroxynitrite or its constituents (superoxide or nitric oxide). Green tea antioxidants can destroy the oxidants. Based on a …
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Design of Iron Oxide-Flavin Nanocomposite Bacterial Cellulose Hydrogels
… nanoparticles (IONPs). When IONPs are coupled to flavins, naturally occurring photoactive isoalloxazine compounds, a heterogenous photocatalytic system is created that can integrate into BC, thus forming nanohybrid photoactive hydrogels. The hybrid gels have shown potential in their applicability …
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Electrical current generation by wild type and mutant Shewanella strains
… involves both cell associated enzymes and flavins acting as soluble electron transfer agents. However, these separate pathways most likely utilize many of the same, membrane proteins to accomplish their function. This study indicates it is likely that the deposition of electrons by S. …
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Ablation of Retbindin, the Riboflavin Binding Protein, Exacerbates Retinal Degenerative Phenotypes in Mouse Models of Human Retinal Diseases
… in wide-range of metabolic processes. Since flavins are directly linked to the metabolism and metabolic dysregulation is a hallmark of degeneration, we hypothesized that Rtbdn, as a riboflavin binding protein, plays a role in modulating the degenerative process. In support of our hypothesis, …
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Biochemical Genetic Analysis of Blue Light Responses in Neurospora Crassa
… Riboflavin analogs were used to demonstrate that flavins can function as photoreceptors. The analogs 1-deazariboflavin and roseoflavin, which have red-shifted absorption, were effective photoreceptors for the photosuppression and phase shifting of circadian conidiation by 540 nm light, but were …
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Multiphoton Endoscopy
… from intrinsic molecules (e.g., NADH, flavins) and produce harmonic generations (e.g., second harmonic generation) within tissues, thereby allowing for real-time images of unprocessed, unstained tissues with resolution and details comparable to gold standard histopathology. Therefore, …
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Mechanistic Insights into MftR-Dependent Regulation of the Redox Cofactor Mycofactocin
… cofactors are essential for life. While classic flavins and nicotinamides are widely distributed across all domains of life, nature has also evolved niche cofactors in subsets of life domains. For example, in <em>Actinobacteria</em>, coenzyme F420 is commonly used in place of flavin …
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Biochemical characterization of respiratory chain flavoproteins
… cofactors with redox properties, such as flavins, hemes, and other iron-containing centers. These redox complexes constitute the electron transport or respiratory chain. This thesis will cover the study of three different flavin-containing proteins related to the electron transport chain: …
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Stereoselectivity, kinetics, and engineering of flavin/deazaflavin oxidoreductases for use in industrial biocatalysis
… more akin to nicotinamides than conventional flavins, F420 plays a crucial role in methanogenesis, antibiotic biosynthesis, and oxidative stress resistance. The taxonomic distribution of F420 is restricted to archaea and a few lineages of bacteria, but it is totally absent from eukaryotes. The …
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Stereoselectivity, kinetics, and engineering of flavin/deazaflavin oxidoreductases for use in industrial biocatalysis
… more akin to nicotinamides than conventional flavins, F420 plays a crucial role in methanogenesis, antibiotic biosynthesis, and oxidative stress resistance. The taxonomic distribution of F420 is restricted to archaea and a few lineages of bacteria, but it is totally absent from eukaryotes. The …
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Drinking Water Quality Monitoring
… include reduced pyridine nucleotides (RPNs), flavins, and cytochromes to distinguish viable bacteria; at 590 nm, the cellular components excited include cytochromes for non-viable bacteria; at 635 nm, the cellular components excited include calcium dipicolinic acid (DPA) for spores. By using …
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