Results 11 to 20 of about 4,722 (253)
Redox Biology, 2022 Exposure to respirable air particulate matter (PM2.5) in ambient air is associated with morbidity and premature deaths. A major source of PM2.5 is the photooxidation of volatile plant-produced organic compounds such as isoprene.
Syed Masood +8 more
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Water Science and Technology, 2021 This study reports the removal of per- and polyfluoroalkyl substances (PFAS) in water using various photocatalytic and photochemical processes.
Nusrat Chowdhury +2 more
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Consumption of Hydrocarbons and Its Relationship with Ozone Formation in Two Chinese Megacities
Atmosphere, 2020 Continuous measurements of ozone and its precursors were performed at sites in two Chinese megacities, i.e., an urban site in Beijing and a suburban site in the Pearl River Delta (PRD).
Chih-Chung Chang +2 more
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Unexpected fast radical production emerges in cool seasons: implications for ozone pollution control
National Science Open, 2022 Ozone is a crucial air pollutant that damages human health and vegetation. As it is related to the photo-oxidation of the nitrogen oxides and volatile organic compounds, the summertime reduction of these precursors is the primary focus of current ozone ...
Wang Hongli +10 more
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Sensitivities of sulfate aerosol formation and oxidation pathways on the chemical mechanism employed in simulations [PDF]
Atmospheric Chemistry and Physics, 2012 The processes of aerosol sulfate formation are vital components in the scientific understanding of perturbations of earth's radiative balance via aerosol direct and indirect effects. In this work, an analysis of the influence of changes in oxidant levels
A. F. Stein, R. D. Saylor
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What comes after the Sun? On the integration of soil biogeochemical pre-weathering into microplastic experiments [PDF]
SOIL, 2022 Recent studies have been engaged in estimating the adverse effects of microplastic (MP) on soil quality parameters. Mass concentrations of MP, as found in highly contaminated soils, have been shown to weaken the soil structure, and parts of the edaphon ...
F. Büks, M. Kaupenjohann
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Electrospray Photochemical Oxidation of Proteins
Journal of the American Society for Mass Spectrometry, 2019 Photooxidation of peptides and proteins by pulsed ultraviolet laser irradiation of an electrospray in the ion source of a mass spectrometer was demonstrated. A 193-nm excimer laser at 1.5-mJ pulse energy was focused with a cylindrical lens at the exit of a nanoelectrospray capillary and ions were sampled into a quadrupole time-of-flight mass ...
Remilekun O, Lawal +2 more
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The Photochemical Oxidation of GaAs [PDF]
Journal of The Electrochemical Society, 1985 Abstract : The vacuum ultraviolet photochemical oxidation of GaAs by N2O (wavelengths of 2537 A and 1849 A) was studied by X-ray photoelectron spectroscopy. We believe the model most consistent with our data involves (1) adsorption of molecular N2O, (2) dissociation of the N2O on the surface, and (3) oxidation of the surface by the adsorbed O atoms ...
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Molecules, 2022 Oxidation of methionine (Met) is an important reaction that plays a key role in protein modifications during oxidative stress and aging. The first steps of Met oxidation involve the creation of very reactive and short-lived transients.
Bronislaw Marciniak, Krzysztof Bobrowski
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Photochemical delivery of nitric oxide [PDF]
Nitric Oxide, 2013 There remains considerable interest in developing methods for the targeted delivery of nitric oxide and other small molecule bioregulators such as carbon monoxide to physiological targets. One such strategy is to use a "caged" NO that is "uncaged" by excitation with light.
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