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Showing 1 to 8 of 8 for “"Atmospheric aging"”.
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The Effect of Atmospheric Aging on a Hybrid Polymer Matrix Composites' Material Properties
… configuration was used to assess the effect that aging had on the static flexure strength of the hybrid composite.</p> <p>It was found that the magnitude in static and fatigue material property reduction increased with aging time, and was dictated by which aging mechanism was dominant. …
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Multiphase Aging of Atmospheric Biomass Burning Brown Carbon
… to increase. Oxidative and photochemical aging in the atmosphere, however, can change BrC’s light absorbing properties as well as its chemical composition. Significant uncertainties remain when estimating BrC’s impact on climate due to its chemical complexity and the range of atmospheric …
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Enabling Routine Chemical Composition and Volatility Distribution Measurements of Aerosols
… and the results of the comparison were encouraging. Mean absolute percentage errors (MAPE) were estimated to be 21% and 27% for aerosol organic carbon and equivalent sulfate (equivalent amount of sulfate for ChemSpot measured sulfur content). Chemspot-measured oxygen-to-carbon ratio (O:C) …
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Field measurements and atmospheric simulation chamber studies of selected biomass burning marker compounds
… through the night, evidence was found for the atmospheric conversion of phenol compounds to their analogous nitrophenols via gas-phase reaction with NO 3 . Positive matrix factorisation was used to identify six different source categories for the VOCs which included fresh and atmospherically …
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Measurements of Atmospheric Radicals
<p>Atmospheric particulate matter (PM) is a global health concern. PM<sub>2.5</sub> is formed primarily through combustion processes such as automobile use and industrial activity. Natural sources of PM<sub>2.5</sub> result from events like volcanos and wildfires. Upon inhalation, PM<sub>2.5</sub> …
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The aging of organic aerosol in the atmosphere : chemical transformations by heterogeneous oxidation
The immense chemical complexity of atmospheric organic particulate matter ("aerosol") has left the general field of condensed-phase atmospheric organic chemistry relatively under-developed when compared with either gas-phase chemistry or the formation of inorganic compounds. In this work, we …
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Primary and secondary emissions from upland fires in Ireland
… was conducted as part of FLARES (Fire, Land and Atmospheric Remote Sensing of EmissionS), a project funded by the Irish Environmental Protection Agency (EPA) to improve the understanding of Irish upland fire emissions. Emission factors (EF) of typical Irish wildfire fuels (heather, gorse, purple …