نتایج جستجو برای: pm1
تعداد نتایج: 625 فیلتر نتایج به سال:
Abstract. In this work, the relationships between size and composition of submicron particles (PM1) were analyzed at an urban site in Metropolitan Area São Paulo (MASP), a megacity with about 21 million inhabitants. The measurements carried out from 20 December 2016 to 15 March 2017. chemical was measured Aerodyne Aerosol Chemical Speciation Monitor distribution TSI Scanning Mobility Particle S...
Form an $n \times n$ matrix by drawing entries independently from $\{\pm1\}$ (or another fixed nontrivial finitely supported distribution in $\mathbf{Z}$) and let $\phi$ be the characteristic polynomial. Conditionally on extended Riemann hypothesis, with high probability is irreducible $\mathrm{Gal}(\phi) \geq A_n$.
The present work mainly developed a mathematical model based on the plug flow and coarse fly ash particles’ fragmentation to describe behavior evolution of formation influence biomass feeding rate flue gas cooling properties, which is validated by literature data. considers homogeneous nucleation alkali vapors, heterogeneous condensation vapors newly formed particles particles, collision-coagul...
The chemical composition and sources of ambient fine particulate matter (PM1) over a period of 2.5 years for a regional background site in the western Mediterranean are presented in this work. Furthermore, sub-micron particle number concentrations and the sources of these particles are also presented. The mean PM1 concentration for the measurement period was 8.9 μg m−3, with organic matter (OM)...
An Aerodyne high resolution time-of-flight aerosol mass spectrometer (HR-ToF-AMS) was deployed during the Carbonaceous Aerosols and Radiative Effects Study (CARES) that took place in northern California in June 2010. We present results obtained at Cool (denoted as the T1 site of the project) in the foothills of the Sierra Nevada Mountains, where intense biogenic emissions are periodically mixed...
Trends and sources of air pollution at twenty-five traffic Intersections (TIs) before during covid-19 lockdown were investigated in Ibadan, Nigeria. The relationships among climatic parameters, vehicular counts ten pollutants which includes particulate matter (PM1, PM2.5, PM10 & Total Suspended Particles-TSP) gaseous (CO, NO2, SO2, NH3, total volatile organic compounds-TVOCs, ground level O...
Aggregate and limestone mining in San Antonio’s Bexar Comal counties Texas, USA, has caused considerable health concerns as of late. actions can result localized air quality issues any neighborhood. Furthermore, heavy truck traffic, hauling, transportation the mined material contribute to pollution. In this research, PM species were sampled at four locations north Antonio city limits. The data ...
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