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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 16 of 16 for “"pyrogallol"”.
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Solvatochromic pyrogallarenes and pyrogallarene crystals
… 2]O, is shown here. This cocrystal of C-propyl pyrogallol[4]arene and the pharmaceutical gabapentin has the potential to alter gabapentin's stability, bioavailability, and dissolution rate. During the cocrystallization process unusual chromogenic behavior was observed, which led to the isolation …
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Biochemistry and genetics of the pathway for the anaerobic degradation of aromatic compounds by Eubacterium oxidoreducens
… for the anaerobic degradation of gallate, pyrogallol and phloroglucinol by Eubacterium oxidoreducens was investigated. Phloroglucinol reductase was purified 90-fold, from the soluble fraction of cell extract, to electrophoretic homogeneity. The enzyme was an α₂ homodimer with a native …
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Pyrogallo4arenes: a synthetic investigation
… involved the study of the acid condensation of pyrogallol with acataldehyde. The product formed, pyrogallol[4]arene, is present as a mixture of two isomers, the rccc cone and the rctt flattened partial cone conformations, which could be separated using an extractiodreprecipitation procedure. A …
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Phytochemical Investigation and Bioactivity Assessment of Medicinal Plant from Northern Nigeria
… antibacterial compounds namely gallic acid and pyrogallol. The Minimum Inhibitory Concentration for pyrogallol and gallic acid against S. aureus growth are 508 and 753 μM, while against MRSA growth are 254 and 2032 μM, respectively. A growth Inhibition assay showed the activity of gallic acid as …
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Metabolism of Gallic Acid by Eubacterium Oxidoreducens
… cell extracts of Eubacterium oxidoreducens with pyrogallol as the only detectable product. A phloro-glucinol reductase catalyzed the conversion of phloroglucinol to dihydrophloroglucinol, using NADPH as the source of electrons. Extracts of cells grown on gallate and formate contained formate …
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Structural supramolecular constructs of spheres and tubes
… took supramolecular hexamers from the cup-shaped pyrogallol[4]arene and produced large spherical and tubular aggregates.
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Characterization and treatment of spent vegetable tan liquors
… of the waste by biological stripping of the pyrogallol compound in the spent waste. Samples collected from the aeration-coagulation system were periodically analyzed for Chemical Oxygen Demand, pH, suspended solids, color removal, volume of sludge produced, and coagulant demand. These values …
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Synthetic ion transporters: new analytical approaches for the investigation of ion binding and transport
… transporters are studied in this dissertation: pyrogallol[4]arene derivatives and dianilides of isophthalic and dipicolininc acids. Experiments aimed at investigating their solution behavior, anion binding properties and the strength of the interactions present in the host*anion adducts employed …
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Plant-based admixtures for cement-based materials
… specifically those containing catechol and pyrogallol units. It is possible that if slight alterations are made to the Standard preparation method used in this study such as a slightly higher microwave energy and if different plant-based materials are combined, such as Rooibos tea and red …
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DETERMINATION OF CO AND MN IN MARINE WATERS USING FLOW INJECTION WITH CHEMILUMINESCENCE DETECTION
… whereby CL emission is produced by oxidation of pyrogallol with hydrogen peroxide in alkaline medium in the presence of CTAB and MeOH. Chapter Four details the optimisation of a FI-CL system for the determination of Mn in seawater. The method chosen involved the luminous oxidation of 7,7,8,8- …
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Basic studies of the cross-linking reaction of collagen with oxazolidine and plant polyphenols
… modelled using simple phenols phioroglucinol, pyrogallol and resorcinol; the process was followed by chromatographic and NMR methods. The results show the reaction is second order: phloroglucinol has the highest reactivity. By using catechin and gallocatechin, it was shown that the …
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Autocatalytic mechanism and functional consequences of covalent heme attachment in CYP4B1
… lauric acid, various hydrocarbons, 4-ipomeanol, pyrogallol, and 1,2,4,5-tetramethoxybenzene, but no obvious distinction emerged. CYP4B1 was comparable to the E310A mutant in terms of heme retention and thermostability, but polar substitutions were not well tolerated in the thermostability assay. …
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Enzymatic polymerisation in situ of depolymerised mimosa tannin applied to stabilisation of collagen
… method was scaled-up, with the addition of pyrogallol as a nucleophile trapping agent, and powdered depolymerised mimosa was obtained. Data show an increase in the monomeric content and decrease in percentage of condensed tannins for the acid-catalysed process, indicating the potential of …
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Chip Scale Integrated Optical Sensing Systems with Digital Microfluidic Systems
… the chemiluminescent signals generated by a pyrogallol droplet solution mixed with H2O2 delivered by the digital microfluidic system. </p><p>Second, polymer microresonator sensors were explored. Polymer microresonators are useful components for chip scale integrated sensing because they can …
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Metallization Process for 3D Printed Electronics: from i3DP II to 3D Co-printing Technology
3D printing has emerged as a powerful additive manufacturing technique and becomes as a viable alternative to conventional manufacturing processes in an increasing number of applications. Thus, the development of printable materials also continues to expand, while polymers are still the most …
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Tropical citrus antioxidants and catabolism of phenolics in green tea, coffee, cocoa and orange juice
… green tea catechins was conducted using GC-MS. Pyrogallol, pyrocatechol, 4-hydroxyphenylacetic acid, (-)5-(3',4'-dihydroxyphenyl)-gamma-valerolactone, (-)-5-(3',4',5'-trihydroxyphenyl)-gamma-valerolactone, 3-(3-hydroxyphenyl)propionic acid and 5-(3,4-dihydroxyphenyl)-gamma-valeric acid were …