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 14 of 14 for “"Peroxyl"”.
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Towards Water-Soluble Peroxyl Radial Clocks
… which can serve as a precursor to a powerful peroxyl radical clock. This competitive kinetic approach is attractive as it allows the facile determination of rate constants for formal H-atom reactions between peroxyl radicals and reductants (e.g. phenolic and aromatic amine antioxidants) …
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Elucidation of the Various Mechanisms of Antioxidant Activity of Organosulfur Compounds
… Trisulfide-1-oxides were shown to react with peroxyl radicals via a concerted bimolecular homolytic substitution reaction, forming a perthiyl radical as product. In Chapter 3, inspired by the findings at 37 °C, we investigated the RTA activity of polysulfides at elevated temperatures, from 100 …
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Antioxidant and antihyperglycemic potential of soybean hydrolysates
… growing regions after alcalase hydrolysis. The peroxyl radical scavenging AC of soy peptides were also compared against purified β-conglycinin and glycinin hydrolysates. Another part of the study was conducted to understand the effect of in vitro simulated digestion of protein-based beverages …
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Lipid Targets of the Antimalarial Trioxanes in <i>Plasmodium falciparum</i>
… BODIPY lipid probe showed artemisinin-mediated peroxyl radical formation <em>in vivo</em> that was inhibited by lipid body depletion. Moreover, lipid extracts from artemisinin-exposed parasites contained increased fatty acids and a cholesteryl ester. <em>in vitro</em> reactions of artemisinin …
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Promotion of Value-Added Uses of Soybeans
… higher scavenging activity against hydroxyl, peroxyl, and ABTS+ radicals. Black seed coat soybeans also contained higher total phenolic contents and isoflavones than the other colored soybeans, and were the only color to contain the anthocyanin cyanidin-3-glucoside. However, when soybean …
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Molecular Probes for Biologically Important Molecules: A Study of Thiourea, Hydroxyl radical, Peroxynitrite and Hypochlorous acid
… Moderately reactive superoxide is converted to peroxyl, alkoxyl and hydroxyl radicals by various enzymatic, chemical, and biochemical processes. Hydroxyl radical imparts rapid, non specific oxidative damage to biomolecules such as proteins and lipids. Superoxide also reacts with nitric oxide in …
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Total synthesis and study of the antilipoperoxidant peridinin, synthesis of versatile MIDA boronate building blocks, and a general strategy for the synthesis of polyenes
… from an early quench of chain propagating lipid peroxyl radicals. Our work with peridinin demonstrated that synthesis is often the rate determining step in studying the function of a molecule. In order to help shift this rate determining step from synthesis to a study of function, we are …
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Antioxidant properties of flaxseed lignans using in vitro model systems
… decomposition and mimics the formation of lipid peroxyl radicals. Interaction of carbon-centred AP radicals with SECO 2 and SDG 1 provides a good model to study the antioxidant reactions of SECO 2 in vitro. p*The relative antioxidant capacity of the flaxseed lignans versus BHT 17, in two model …
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Oxidation of Disinfection Byproducts and Algae-related Odorants by UV/H₂O₂
… two second steps: reaction with oxygen producing peroxyl radical or interaction with water molecule causing O-H insertion/H-Br elimination. Trichloromethane and mono-, di-, and tri-chlorinated HAAs were not substantially removed under the same conditions used for the brominated compounds. The …
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The mobility of oxygen containing species (OCS*) over Pt-based catalyst surfaces: Impact on the oxygen reduction reaction (ORR) activity
… these surfaces. On Pt(111), the ORR follows a peroxyl pathway at T < 500 K and a dissociative pathway at T > 700 K. On Pt(100) surface H2O* is formed via O* hydrogenation to OH* followed by 2OH* coupling to H2O* and O*. The ORR activity on multifaceted Pt surfaces was shown to be dependent on …
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Photochemical Formation Mechanisms and Applications of Mn Oxide Nanomaterials
… including reactive oxygen species (ROS), peroxyl radical (ROO•), reactive halogen species (RHS), dissolved natural organic matter (DOM), nanoplastics, and co-existing cations on the photochemically-induced oxidation of Mn2+(aq) and the nucleation of Mn oxide solids. First, we investigated …
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The antioxidant properties of 4–quinolones compared to structurally related flavonoids
… the ability of the test series to scavenge peroxyl radicals leading to lipid peroxidation. The 2-phenylquinolin-4( 1 H)-ones demonstrated moderate activity, with 7-hydroxy-2-phenylquinolin-4(1 H)-one (9) observed to be the best of the group. 6-Hydroxyflavone (5) however, performed the best …
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Radiation biophysical modeling of the FLASH effect: from mechanistic understanding towards clinical endpoint prediction
… reducing the accumulation in time of organic peroxyl radicals ROO•, and thus the cell toxicity. In fact, the persistence of ROO• in the cellular environment leads to biological damage [Labarbe et al., 2020]. For this reason, we link the different time evolution of the organic peroxyl radical …
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Oxidative DNA-Schädigung durch elektronisch angeregte Carbonylverbindungen und daraus gebildete Radikalspezies
… Bestrahlung der „Gruppe B“-Ketone generierten Peroxylradikale, neben wenigen direkt induzierten Strangbrüchen, hauptsächlich die Guaninoxidationsprodukte 8-oxoGua und guanidinfreisetzende Produkte (GRP). Erst wenn die DNA-Konzentration zehnfach erhöht wird (625 µM), tritt bei der Photolyse der …