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Showing 1 to 20 of 46 for “"autoxidation"”.
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The Stability of Thermal Polymers of Ethyl-Linoleate to Autoxidation
Made available in DSpace on 2014-12-05T19:06:39Z (GMT). No. of bitstreams: 1 0015176.pdf: 2998421 bytes, checksum: 634af0979ff76f23e62b8232a44dd8bb (MD5) Previous issue date: 1955
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Monitoring a natural autoxidation process of methyl linoleate by using GC-MS
… system at a controlled temperature. A natural autoxidation of methyl linoleate was observed without the addition of an initiating reagent. This autoxidation process could be used to mimic the course of lipid peroxidation, which is the major cause ofradical damage to living cells. The technology …
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The Autoxidation of Enol Forms of Hindered 1,2-Diaroylcycloalkanes. A Newroute to Epoxy Ketones
Made available in DSpace on 2014-12-05T19:37:07Z (GMT). No. of bitstreams: 1 5902019.pdf: 4207461 bytes, checksum: bc6db2c3fbabc35390df8bd9cd757d37 (MD5) Previous issue date: 1959
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Studies on the oxidative degradation of fluphenazine decanoate in oily solution
… via the hydroperoxides formed as a result of autoxidation of the oil. Synthesis and characterisation of the expected oxidation products of the drug was undertaken so that the formation of these degradation products in oily solution, could be accurately determined. By this means the rate of …
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A Study of the Role of Hydroperoxides in the Degradation and Stabilisation of Polymers
… supposed to be effective photoactivators for the autoxidation of polyethylene, was also studied. The efficiency of these complexes as well as nitrobenzene and plant pigments as photoactivators in the autoxidation of natural rubber was looked into. The mechanism of action of nitrobenzene in natural …
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Discovery and Mechanisms of Small Molecule Amyloid Formation Inhibitors
… We also demonstrate that in general, autoxidation enhances the anti-amyloid potency associated with many catechol containing amyloid inhibitors that may be mechanistically linked to a covalent mode of action. For example, we demonstrate that the O-quinone form of baicalein conjugates …
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I. The Catalytic Oxidation of Olefins by a Cobalt Complex. Ii. The Thermodynamics of Base Binding to a Cobalt Complex (Cosmdpt)
… first row transition metals, proceed by autoxidation. Since this is a free radical chain reaction the reaction generally is not selective and a variety of products are formed. In chapter I of this thesis is reported a mechanistic study of the oxidation of olefins by cobalt …
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An investigation of the oxidative cleavage of the double bond
… linkage in oleic acid was obtained from its autoxidation over a period of four hundred twenty-five hours, with or without a catalyst. 2. The ozonide of oleic acid was not formed, although the presence of peroxide oxygen was detected. 3. Iron oxide (Fe₃O₄) was a positive autoxidation catalyst, …
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Oxidation Mechanisms of Tetrahydrofolic Acid, Tetrahydrobiopterin and Related Compounds
The autoxidation of tetrahydrofolic acid and tetrahydrobiopterin, 6-substituted derivatives of 2-amino-4-hydroxy-5,6,7,8-tetrahydropteridine (tetrahydropterin), has been investigated by product analysis and kinetic methods using gas manometric and spectrophotometric techniques. The overall reaction …
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Drying Oils Treated by Irradiation as Coatings for Biobased Films
… of protein-based films. Drying oils undergo autoxidation after a period exposure to air to yield high molecular weight polymers that form water resistant coatings. However, curing of drying oils at ambient conditions is very slow and technologies for fast curing are needed. Furthermore, …
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Free Radical Activity, Lipid Peroxidation and Antioxidant Status in Diabetes Mellitus
… in the chronic complications of diabetes. The autoxidation and glycoxidation reactions of glucose are sources of free radicals in vitro and a preliminary investigation that these reactions may be a source of free radicals in vivo was undertaken in patients admitted to hospital with severe …
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Investigation of oxidation in nonaqueous lithium-air batteries
… observed at and above 50 °C. Finally, the autoxidation of PEO at 60 °C in Li-O₂ environments was studied, where NMR and DEMS measurements showed that the rate of PEO autoxidation increases with increasing applied potential, and that this reaction has a significant impact after only one …
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Oxidativer Stress in Pflanzen : Untersuchungen zum D1-Phytoprostan-Signalweg
… Zudem konnten diese Verbindungen durch Autoxidation von alpha-Linolensäure gewonnen werden. PPD1 und dPPJ1 wurden chromatographisch aufgetrennt und UV-spektroskopisch und massenspektrometrisch charakterisiert. Zum Nachweis von PPD1 und dPPJ1 in planta wurde eine neuartige Analysenmethode …
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A study of the mannich reaction with certain phenols, of the causes of formation of coloured products and the prevention of their occurence
… by T. L. C. The coloured products formed from autoxidation of resorcinol, orcinol and hydrolr-ß-orcinol in presence of ammonia, methylamine and dimethylamine were isolated by column chromatography and preparative TLC and examined by 1H NMR, I. R, U. V. and mass spectroscopy. Structures of some …
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Molecular basis of MPTP-induced Parkinson's disease
… to generate superoxide radical (⋅O₂⁻) during its autoxidation process. The generation of ⋅O₂⁻ was detected by their ability to reduce ferricytochrome c. Superoxide dismutase (SOD) inhibited this reduction in a dosedependent manner. The rate of reduction of ferricytochrome c was dependent not only …
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An evaluation of the environmental fate of reactive dyes
… and Naphthol Blue-Black, were reduced and their autoxidation products identified by LC-MS. These were subsequently used to predict the autoxidation products of a more complex azo reactive dye: Reactive Red 3.1. Additionally, a persistent degradation product from the anaerobicaerobic treatment of …
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In vitro and in vivo studies on the biotransformation of β-nicotyrine, a minor tobacco alkaloid
… exist in equilibrium. The pyrrolinones undergo autoxidation to form a secondary metabolite, 5-hydroxy-1-methyl-S-(3-pyridyl)-3-pyrrolin-2-one, and hydrolysis to form 5'-hydroxycotinine. The autoxidation is likely to involve a free radical process. Evidence to support this proposal has been …
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Southern pine beetle, Dendroctonus frontalis Zimmermann (Coleoptera: Scolytidae): quantitative analysis of chiral semiochemicals
… be due to the multiple pathways of origin (SPB, autoxidation, and microorganisms). Analysis of the same semiochemicals isolated from hindguts of individual beetles from Texas, South Carolina, and North Carolina showed quantities of cV and tV to be substantially greater in females than in males; …
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