A5083543670- Air Quality and Health Impacts
- Atmospheric chemistry and aerosols
- Air Quality Monitoring and Forecasting
- Atmospheric Ozone and Climate
- Thermal Radiation and Cooling Technologies
- Indoor Air Quality and Microbial Exposure
- Advanced Thermodynamics and Statistical Mechanics
- Water Quality Monitoring and Analysis
- Near-Field Optical Microscopy
- Thermal properties of materials
- Energy and Environment Impacts
- Mechanical and Optical Resonators
- Climate Change and Health Impacts
Forschungszentrum Jülich
2022-2024
Background: Secondary organic aerosols (SOAs) formed from anthropogenic or biogenic gaseous precursors in the atmosphere substantially contribute to ambient fine particulate matter [PM ≤2.5μm aerodynamic diameter (PM2.5)] burden, which has been associated with adverse human health effects. However, there is only limited evidence on their differential toxicological impact. Objectives: We aimed discriminate effects of generated by atmospheric aging combustion soot particles (SPs) (β-pinene)...
The health effects of exposure to secondary organic aerosols (SOAs) are still limited. Here, we investigated and compared the toxicities soot particles (SP) coated with β-pinene SOA (SOAβPin-SP) SP naphthalene (SOANap-SP) in a human bronchial epithelial cell line (BEAS-2B) residing at air–liquid interface. SOAβPin-SP mostly contained oxygenated aliphatic compounds from photooxidation, whereas SOANap-SP significant fraction aromatic products under similar conditions. Following exposure,...
Soot particles (SP) are ubiquitous components of atmospheric particulate matter and have been shown to cause various adverse health effects. In the atmosphere, freshly emitted SP can be coated by condensed low-volatility secondary organic inorganic species. addition, gas-phase oxidants may react with surface SP. Due chemical physical resemblance carbon backbone polyaromatic hydrocarbon species their potent oxidation products, we investigated biological responses BEAS-2B lung epithelial cells...
Abstract. Highly oxygenated molecules (HOMs) from the atmospheric oxidation of biogenic volatile organic compounds are important contributors to secondary aerosol (SOA). Organic peroxy radicals (RO2) and hydroperoxy (HO2) key species influencing HOM product distribution. In laboratory studies, experimental requirements often result in overemphasis on RO2 cross-reactions compared reactions with HO2. We analyzed photochemical formation HOMs α-pinene their potential contribute SOA under high...
The atmospheric aging of volatile organic compounds leads to the formation complex mixtures highly oxidized secondary aerosols (SOAs). State-of-the-art mass spectrometry (MS) has become a pivotal tool for their chemical characterization. In this study, we characterized complexity naphthalene-derived SOA by three different time-of-flight (TOF) spectrometric techniques applying electron ionization: high-resolution–TOF–aerosol MS (AMS), direct inlet probe (DIP)–high-resolution TOFMS, and...
We theoretically investigate the heat transfer between two metals across a vacuum gap in extreme near-field regime by quantifying relative contribution of electrons, phonons and photons. show that electrons play dominant role at subnanometric distance subject to temperature gradient. Moreover, we demonstrate this effect is dramatically amplified presence an applied bias voltage. These results could pave way novel strategies for thermal management energy conversion regime.
Abstract. Highly oxygenated molecules (HOM) from the atmospheric oxidation of biogenic volatile organic compounds are important contributors to secondary aerosol (SOA). Organic peroxy radicals (RO2) and hydroperoxy (HO2) key species influencing HOM product distribution. In laboratory studies experimental requirements often result in overemphasis RO2 cross-reactions compared reactions with HO2. We analyzed photochemical formation HOMs α-pinene their potential contribute SOA under high (≈1/1)...