Abstract Secondary organic aerosols (SOA) are one of the main sources uncertainty in current understanding Earth’s climate. Agriculture contributes to primary aerosol emissions, but there is no estimate SOA formation from gaseous precursors. Organic waste products such as sewage sludge applied cropland fertilizers. In this work, we show that an unaccounted source nucleation precursors, skatole ...

Many recent models underpredict secondary organic aerosol (SOA) particulate matter (PM) concentrations in polluted regions, indicating serious deficiencies in the models’ chemical mechanisms and/or missing SOA precursors. Since tropospheric photochemical ozone production is much better understood, we investigate the correlation of odd-oxygen ([Ox]≡[O3]+[NO2]) and the oxygenated component of org...

At present the processes of chemical vapour deposition (MO CVD) and physical vapour deposition (PVD) are widely used to obtain the layers of different materials. A possibility to obtain materials of the required composition (elementary, complex, composite, etc.) is determined by the chemical nature of a precursor. By now a set of criteria for the precursors to meet the MO CVD and PVD standards ...

Petroleum and dairy operations are prominent sources of gas-phase organic compounds in California’s San Joaquin Valley. It is essential to understand the emissions and air quality impacts of these relatively understudied sources, especially for oil/gas operations in light of increasing US production. Ground site measurements in Bakersfield and regional aircraft measurements of reactive gas-phas...

This work deals on the preparation of silicon oxycarbide (SiOC) and boron (SiBOC) ceramics from pyrolysis involving alkoxysilanes with different organic groups. Boron content, substituent annealing time were evaluated crystallization composition resulting ceramics. B-free precursors composed methyltriethoxysilane (MTES), phenyltriethoxysilane (PTES) vinyltrimethoxysilane (VTMS) obtained by sol-...

Background & Aims of the Study: In some situation like rainfall seasons raw water become very turbid so it affected the water treatment plant processes and quality of produced water. Treatment of very high turbid water has some concerns like precursors for disinfection by-products and very loading rate of particle on filter's media and consequently increases in water consumptio...

In article number 2001482, Helen Hejin Park, Jangwon Seo, and co-workers introduce copper oxide by pulsed-chemical vapor deposition as a buffer layer, which protects the organic hole transport layer from sputtering damage during of transparent conducting oxide. On cover authors illustrate precursors used their approach integrated in semitransparent perovskite solar cell applications.

Gas and particle-phase organic carbon compounds soluble in water (e.g., WSOC) were measured simultaneously in Atlanta throughout the summer of 2007 to investigate gas/particle partitioning of ambient secondary organic aerosol (SOA). Previous studies have established that, in the absence of biomass burning, particulate WSOC (WSOCp) is mainly from secondary organic aerosol (SOA) production. Compa...

Ground-level ozone (O3), harmful to most living things, is produced from both domestic and foreign emissions of anthropogenic precursors. Previous estimates of the linkage from distant sources rely on the sensitivity approach (i.e., modeling the change of ozone concentrations that result from modifying precursor emissions) as well as the tagging approach (i.e., tracking ozone produced from spec...

A versatile, low-energy and solvent-free method to access nanoparticles (NPs) of four different transition metals, based on a bottom-up mechanochemical procedure involving milling of inorganic precursors, is presented. Lignin, a biomass waste, was used effectively as a reducing agent, for the first time in a mechanochemical context, to access MNPs where M = Au, Pd, Ru, Re. A series of metal pre...