Search Results - "Electron paramagnetic resonance"

Radical Scavenging of White Tea and Its Flavonoid Constituents by Electron Paramagnetic Resonance (EPR) Spectroscopy by Nurul Aini, Mohd Azman, Peiro, Sara, Fajari, Lluis, Julia, Luis, Almajano, María Pilar

“…The subject of this paper is the use of the spin trap method and electron paramagnetic resonance (EPR) spectroscopy as the analytical tool to measure, for the first time, the radical scavenging activity of WT and its major catechin components, epicatechin (EC), epicatechin-3-gallate (ECG), epigallocatechin (EGC), and epigallocatechin-3-gallate (EGCG), against the methoxy radical, using ferulic acid as antioxidant pattern. …”
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Radical Scavenging of White Tea and Its Flavonoid Constituents by Electron Paramagnetic Resonance (EPR) Spectroscopy by Nurul Aini, Mohd Azman, Peirò, Sara, Fajari, Lluis, Julià, Luis, Almajano, María Pilar

“…The subject of this paper is the use of the spin trap method and electron paramagnetic resonance (EPR) spectroscopy as the analytical tool to measure, for the first time, the radical scavenging activity of WT and its major catechin components, epicatechin (EC), epicatechin-3-gallate (ECG), epigallocatechin (EGC), and epigallocatechin-3-gallate (EGCG), against the methoxy radical, using ferulic acid as antioxidant pattern. …”
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Characterizing the conformational dynamics of metal-free PsaA using molecular dynamics simulations and electron paramagnetic resonance spectroscopy by Deplazes, Evelyne, Begg, S., Van Wonderen, J., Campbell, R., Kobe, B., Paton, J., MacMillan, F., McDevitt, C., O'Mara, M.

“…Here, we use continuous wave electron paramagnetic resonance (EPR) spectroscopy and molecular dynamics (MD) simulations to study the relative flexibility of the structural domains in metal-free PsaA and its distribution of conformations in solution. …”
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Environmentally persistent free radicals(EPFRs) in the airborne particulate matter by Guo, Dengting

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EPR relaxation : progress in hardware and analysis methods by Roberts, Peter Joseph

Subjects: “…Electron Paramagnetic Resonance…”
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Synthesis and characterization of nickel zinc ferrite nanoparticles prepared by thermal treatment method by Poh, Lin Leng

“…The magnetic properties were determined by vibrating sample magnetometer and electron paramagnetic resonance electron paramagnetic resonance at room temperature. …”
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Carbocatalytic activation of persulfate for removal of antibiotics in water solutions by Kang, J., Duan, X., Zhou, L., Sun, Hongqi, Tadé, M., Wang, S.

“…The activation processes were studied by in situ electron paramagnetic resonance (EPR), which discovered the newly observed hydroxyl radicals from PS activation. …”
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Surface-tailored nanodiamonds as excellent metal-free catalysts for organic oxidation by Duan, X., Ao, Z., Li, D., Sun, Hongqi, Zhou, L., Suvorova, A., Saunders, M., Wang, G., Wang, S.

“…Cyclic voltammetry analysis, electron paramagnetic resonance (EPR) spectra, classical quenching tests, and density functional theory (DFT) calculations are integrated for a mechanistic study. …”
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Oxygen functional groups in graphitic carbon nitride for enhanced photocatalysis by Liu, S., Li, D., Sun, Hongqi, Ang, Ming, Tadé, Moses, Wang, Shaobin

“…The photoinduced reactive radicals and the associated photodegradation were investigated by in situ electron paramagnetic resonance (EPR). The reactive radicals, O2 - and OH, were responsible for organic degradation.…”
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Photochemical degradation of phenol solutions on Co3O4 nanorods with sulfate radicals by Wang, Yuxian, Zhou, Li, Duan, X., Sun, Hongqi, Tin, E., Jin, W., Wang, Shaobin

“…The performances of the samples in catalytic activation of peroxymonosulfate (PMS) for phenol degradation were found to be dependent on the calcination temperature. Electron paramagnetic resonance (EPR) and classical quenching tests were applied to investigate the mechanism of PMS activation and phenol oxidation. …”
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Effects of nitrogen-, boron-, and phosphorus-doping or codoping on metal-free graphene catalysis by Duan, X., Indrawirawan, S., Sun, Hongqi, Wang, Shaobin

“…Kinetic studies indicated that initial phenol concentration, PMS dosage, and temperature presented significant influences on the degradation rates. Electron paramagnetic resonance (EPR) analysis provided further insights into the evolution of active radicals during the activation of PMS and SO4•− was believed to be the primary radicals in the oxidation reactions. …”
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Low temperature combustion synthesis of nitrogen-doped graphene for metal-free catalytic oxidation by Indrawirawan, S., Sun, Hongqi, Duan, X., Wang, Shaobin

“…The mechanism of PMS activation and phenol oxidation was elucidated by employing both electron paramagnetic resonance (EPR) studies and quenching tests with ethanol and tert-butanol.…”
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Cobalt silicate hydroxide nanosheets in hierarchical hollow architecture with maximized cobalt active site for catalytic oxidation by Shao, P., Tian, J., Duan, Xiaoguang, Yang, Y., Shi, W., Luo, X., Cui, F., Luo, S., Wang, Shaobin

“…The catalytic oxidation mechanism was further elucidated by the quenching tests, electron paramagnetic resonance and photoluminescence studies. …”
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Nitrogen-doped bamboo-like carbon nanotubes with Ni encapsulation for persulfate activation to remove emerging contaminants with excellent catalytic stability by Kang, J., Duan, Xiaoguang, Wang, C., Sun, H., Tan, X., Tade, Moses, Wang, Shaobin

“…Moreover, Ni@NCNTs showed an excellent stability because of nitrogen heteroatom doping and Ni nanoparticle encapsulation. Electron paramagnetic resonance (EPR) and classical radical quenching tests discovered a simultaneous radical/non-radical mechanism in Ni@NCNTs/persulfate system. …”
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Hierarchical shape-controlled mixed-valence calcium manganites for catalytic ozonation of aqueous phenolic compounds by Wang, Y., Xie, Y., Sun, Hongqi, Xiao, J., Cao, H., Wang, Shaobin

“…Quenching reagents and electron paramagnetic resonance (EPR) spectroscopy were applied to probe the dominant reactive species in the catalytic ozonation over the calcium manganites. …”
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New insights into heterogeneous generation and evolution processes of sulfate radicals for phenol degradation over one-dimensional a-MnO2 nanostructures by Wang, Yuxian, Indrawirawan, S., Duan, X., Sun, Hongqi, Ang, Ming, Tade, Moses, Wang, Shaobin

“…The phenol oxidation can be described by a first-order kinetic model and the activation energies of phenol oxidation on three a-MnO2 materials were estimated to be 20.3, 39.3 and 87.1 kJ/mol on nanowires, nanorods, and nanotubes, respectively. Both electron paramagnetic resonance (EPR) spectra and competitive radical tests were applied to investigate the PMS activation processes and to differentiate the major reactive species dominating the catalytic oxidation. …”
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Facile Synthesis of Hierarchically Structured Magnetic MnO2/ZnFe2O4 Hybrid Materials and Their Performance in Heterogeneous Activation of Peroxymonosulfate by Wang, Yuxian, Sun, Hongqi, Ang, H.M., Tade, Moses, Wang, Shaobin

“…The generation and evolution of sulfate radicals and phenol oxidation were studied using both competitive radical tests and electron paramagnetic resonance (EPR).…”
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EPR dosimeter material properties of potassium tartrate hemihydrate by Mohd Nor, Norehan, Hashim, Suhairul, Ramli, Ahmad Termizi, Saion, Elias, Kadni, Taiman

“…The ability of potassium tartrate hemihydrate as a radiation sensitive material for electron paramagnetic resonance (EPR) dosimetry was investigated. …”
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Paramagnetic, near-infrared fluorescent Mn-doped PbS colloidal nanocrystals by Knott, Andrew N.

“…Magnetisation and electron paramagnetic resonance (EPR) measurements show that the incorporation of manganese imprints PbS nanoparticles with paramagnetic properties. …”
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An insight into metal organic framework derived N-doped graphene for the oxidative degradation of persistent contaminants: formation mechanism and generation of singlet oxygen from... by Liang, P., Zhang, C., Duan, Xiaoguang, Sun, Hongqi, Liu, Shaomin, Tade, Moses, Wang, Shaobin

“…With PMS activation, N-graphene exhibited efficient catalytic degradation of various organic pollutants such as phenol, 2,4,6-trichlorophenol (TCP), sulfachloropyridazine (SCP) and p-hydroxybenzoic acid (PHBA). Electron paramagnetic resonance (EPR) spectroscopy and radical quenching tests were employed to investigate the PMS activation and organic degradation processes. …”
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