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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 99 for “"CATECHOL"”.
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The behavior of Fe3+ coordination in alginate-catechol networks
… an array of self-healing hydrogels with catechol-modified, 4-branched PEG (4cPEG) and various metal ions, primarily Fe3+. While considerable testing has been conducted with 4cPEG, the effects of changing the polymer backbone have not been investigated extensively. Here, alginate was …
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Redox-induzierte Speziesverteilung von Arsen im Eisenreduktionsmilieu hervorgerufen durch Catechol
… Batchversuchen wurde die Eisenreduktion durch Catechol, als Modellsubstanz für Huminstoffe, und die damit einhergehende Arsenfreisetzung untersucht. Im Vordergrund stand die Frage, ob diese Substanz eine Auflösung von Eisenhydroxiden bewirken und dabei Arsen freisetzen kann. Es wurde weiterhin …
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Effects of Poly(Catechol-Styrene) in Dental Primers and Bonding to Zirconia
… for use as an underwater adhesive is poly(catechol-styrene), also known as, PCS. The purpose of this research paper is to determine the effects of PCS in dental primers and shear bond strength of G-Cement to zirconia ceramic. Methods: The PCS primer solutions were prepared with and without …
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The Effects of Inorganic Solids and Certain Gases on the Thermal Decomposition of Catechol
… to perform experiments on the model compound catechol (ortho-dihydroxybenzene), a phenol-type compound representative of coal, wood and biomass. Calcium carbonate and iron oxide are inorganic components of coal and wood, which have demonstrated catalytic properties in thermal reactions and are …
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A COMPUTATIONAL STUDY OF KETO-ENOL EQUILIBRIA OF CATECHOL IN GAS AND AQUEOUS SOLUTION PHASE
Keto-enol equilibria in catechol have been studied using ab initio methods and first principle density functional theory. Six structural isomers of C6H6O2 were fully optimized in gas phase at HF and B3LYP levels of theory in combination with the 6-311++G** basis set. Self-Consistent Reaction Field …
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Gas-Phase Formation of Environmentally Persistent Free Radicals from Thermal Degradation of Catechol, Hydroquinone, Phenols and Tobacco
Catechol, hydroquinone and Phenol are major constituents of the mainstream tobacco smoke. The toxicity of tobacco has been attributed to the ability of catechol and hydroquinone to undergo endogenous or exogenous redox cycling to form semiquinone type radicals responsible of Reactive Oxygen Species …
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Characterization and genome-scale metabolic modeling of catechol-degrading Pseudomonas fluorescens isolated from a petroleum hydrocarbon-impacted site
… investigate its PHC biodegradation performance, catechol, an important metabolic intermediate during monoaromatic hydrocarbon biodegradation, was chosen as the sole carbon source. A set of experiments based on a 23 factorial design was undertaken to investigate how nitrate, sulfate, and phosphate …
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Discovery and Mechanisms of Small Molecule Amyloid Formation Inhibitors
… main observation was the important role that the catechol functional group plays in modulating and preventing amyloid formation. In this context, each chapter provides unique yet complementary mechanistic insight that delineates a wide range of anti-amyloid activities associated with preventing …
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The Synthesis and Chemical Profiling of 3,4-Methylene-Dioxymethamphetamine (MDMA) and Analogues
… ‘pre-precursors’. Methylone was synthesised from catechol by one synthetic route. Safrole was synthesised from catechol by two synthetic routes (Routes 1 and 2) and from eugenol by one synthetic route (Route 3). MDMA was synthesised from catechol- and eugenol-derived safrole via two routes (Routes …
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ΠΑΡΑΛΑΒΗ ΜΟΡΦΩΝ ΑΡΓΙΛΙΟΥ ΤΟΥ ΕΔΑΦΟΥΣ (ΝΕΑ ΜΕΘΟΔΟΣ ΜΕ ΠΥΡΟΚΑΤΕΧΙΝΗ)
… PAPER A PROCEDURE IS PRESENTED WHICH EMPLOYS CATECHOL TO RECEIVE THE AL OF THE SOIL FREE OXIDES. THE CATECHOL WAS EMPLOYED BECAUSE OF ITS CAPACITY TO FORM COMPLEXES WITH ALUMINUM AND SILICON. SAMPLES OF AMORPHOUS ALUMINUM HYDROXIDES, SILICATE MINERALS AND ACID SOILS WERE TREATED REPEATEDLY …
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Characterization of a Catechol-Type Siderophore and the Detection of a Possible Outer Membrane Receptor Protein from <em>Rhizobium leguminosarum</em> strain IARI 312.
… There are two main classes of siderophores: catechol and hydroxamate. Catechol-type siderophores chelate ferric iron via hydroxyl groups, and hydroxamate-type siderophores chelate ferric iron via a carbonyl group with an adjacent nitrogen. Rhizobia fix atmospheric nitrogen symbiotically in …
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An Experimental Investigation of the Role of Small Hydrocarbons and Combustion-Generated Nanoparticles on the Formation and Growth Reactions of Polycyclic Aromatic Hydrocarbons during the Pyrolysis of a Model-Fuel and Hydrocarbon Gases
… the C<sub>3</sub> hydrocarbon, propyne; with catechol (<i>ortho</i>-dihydroxybenzene), a model-fuel representative of aromatic moieties in coal and biomass fuels; and with propyne and catechol together. Further, to better understand the role of fuel components and their decomposition products …
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Molecular and Genetic Relationships of Aromatic Metabolic Plasmids in Pseudomonads
… and toluate as intermediates to converge at catechol or its methylated derivative. Catechol is further dissimilated, through the (alpha)-keto acid pathway (meta cleavage), to acetaldehyde and pyruvate which enter the tricarboxylic acid cycle. The plasmids are large, 40-75 megadaltons (Md) …
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Abiotische frühdiagenetische Redoxprozesse mit Eisen
… monomerer Einheiten von Huminstoffen wie Catechol, Guaiacol, Hydrochinon und Resorcin wurden Redoxprozesse mit Eisen(III) untersucht. Mit Ausnahme von Resorcin kann für alle angesetzen Substanzen eine Eisenreduktion festgestellt werden. Bei den Verbindungen Catechol und Guaiacol kann der …
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Phytochemical Investigation and Bioactivity Assessment of Medicinal Plant from Northern Nigeria
… in the identification of a cytotoxic compound, catechol, and the half maximal effective concentration (EC50) observed was 86μM. The growth inhibition effect of catechol was observed to be time- and concentration- dependent. Endophytic Klebsiella pneumonia species (strain A and B) were shown to …
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