A5004825633- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Mass Spectrometry Techniques and Applications
- Particle physics theoretical and experimental studies
- Analytical Chemistry and Chromatography
- Vehicle emissions and performance
- High-Energy Particle Collisions Research
- Toxic Organic Pollutants Impact
- Air Quality Monitoring and Forecasting
- Advanced Chemical Sensor Technologies
- Particle Detector Development and Performance
- Semiconductor Quantum Structures and Devices
- Analytical chemistry methods development
- Quantum Chromodynamics and Particle Interactions
- Maritime Transport Emissions and Efficiency
- Metabolomics and Mass Spectrometry Studies
- Quantum and electron transport phenomena
- Thermochemical Biomass Conversion Processes
- Petroleum Processing and Analysis
- Indoor Air Quality and Microbial Exposure
- Energy and Environment Impacts
- Atmospheric and Environmental Gas Dynamics
- Neutrino Physics Research
- Spectroscopy and Quantum Chemical Studies
- Coffee research and impacts
University of Rostock
2016-2025
Helmholtz Zentrum München
2016-2025
Institute of Bioinformatics and Systems Biology
2005-2023
Imaging Center
2023
Leibniz Institute of Polymer Research
2023
Deutsches Elektronen-Synchrotron DESY
2008-2022
Czech Academy of Sciences, Institute of Analytical Chemistry
2015-2021
Center for Environmental Health
2021
Universität der Bundeswehr München
2021
Jinan University
2021
Abstract. PM1 (particulate matter with an aerodynamic diameter <1 μm) non-refractory components and black carbon were measured continuously together additional air quality atmospheric parameters at urban background site in Barcelona, Spain, during March 2009 (campaign DAURE, Determination of the sources Aerosols Urban Rural Environments western Mediterranean). Positive matrix factorization (PMF) was conducted on organic aerosol (OA) data by mass spectrometer, both unit (UMR) high...
Abstract. The effect of a post-industrial megacity on local and regional air quality was assessed via month-long field measurement campaign in the Paris metropolitan area during winter 2010. Here we present source apportionment results from three aerosol mass spectrometers two aethalometers deployed at stations within region. Submicron composition is dominated by organic fraction (30–36%) nitrate (28–29%), with lower contributions sulfate (14–16%), ammonium (12–14%) black carbon (7–13%)....
Abstract Herbal mixtures like ‘Spice’ with potentially bioactive ingredients were available in many European countries since 2004 and are still widely used as a substitute for cannabis, although merchandized ‘herbal incense’. After gaining high degree of popularity 2008, big quantities these drugs sold. In December synthetic cannabinoids identified the which not declared ingredients: C 8 homolog non‐classical cannabinoid CP‐47,497 (CP‐47,497‐C8) cannabimimetic aminoalkylindole called...
Metabolic challenge protocols, such as the oral glucose tolerance test, can uncover early alterations in metabolism preceding chronic diseases. Nevertheless, most metabolomics data accessible today reflect fasting state. To analyze dynamics of human metabolome response to environmental stimuli, we submitted 15 young healthy male volunteers a highly controlled 4 d protocol, including 36 h fasting, and lipid tests, liquid test meals, physical exercise, cold stress. Blood, urine, exhaled air,...
Abstract. During winter 2013, extremely high concentrations (i.e., 4–20 times higher than the World Health Organization guideline) of PM2.5 (particulate matter with an aerodynamic diameter < 2.5 μm) mass (24 h samples) were found in four major cities China including Xi'an, Beijing, Shanghai and Guangzhou. Statistical analysis a combined data set from elemental carbon (EC), organic (OC), 14C biomass-burning marker measurements using Latin hypercube sampling allowed quantitative source...
Heavy fuel oil (HFO) particulate matter (PM) emitted by marine engines is known to contain toxic heavy metals, including vanadium (V) and nickel (Ni). The toxicity of such metals will depend on the their chemical state, size distribution, mixing state. Using online soot-particle aerosol mass spectrometry (SP-AMS), we quantified five (V, Ni, Fe, Na, Ba) in HFO-PM soot particles produced a diesel research engine. in-soot metal concentrations were compared in-PM
Atmospheric brown carbon (BrC) is an important contributor to the radiative forcing of climate by organic aerosols. Because molecular diversity BrC compounds and their dynamic transformations, it challenging predictively understand optical properties. OH radical O3 reactions, together with photolysis, lead diminished light absorption lower warming effects biomass burning BrC. The night-time aging on properties aerosols are less known. To address this knowledge gap, NO3 chemistry tar from...
Growing literature has documented varying toxic potencies of source- or site-specific fine particulate matter (PM2.5), as opposed to the practice that treats particle toxicities independent composition given incomplete understanding toxicity constituents. Quantifying component-specific contribution is key unlocking geographical disparities from a mixture perspective. In this study, we performed integrated mixture–toxicity experiments and modeling quantify metals polycyclic aromatic...
Abstract Ship engines in the open ocean and Arctic typically combust heavy fuel oil (HFO), resulting light-absorbing particulate matter (PM) emissions that have been attributed to black carbon (BC) conventional, soluble brown (brC). We show here neither BC nor brC is major (LAC) species HFO-combustion PM. Instead, “tar brC” dominates. This tar brC, previously identified only open-biomass-burning emissions, shares key defining properties with BC: it insoluble, refractory, substantially...
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)...
Abstract The dependence of two‐particle energies on plasma density is investigated using Green's functions. An effective exciton equation derived taking into account dynamically screened potential and one‐particle self‐energies. A variational calculation shows that the bound state levels (exciton energies) remain practically constant whereas continuum edge (band gap) shifts to lower with increasing density, which in accordance experimental observations.
Thanks to recent technological advances and single-photon ionization's (SPI's) ability detect all organics, the technique could become long-sought universal soft ionization method. (To listen a podcast about this feature, please go Analytical Chemistry Web site at pubs.acs.org/journal/ancham.).
The chemical composition of particulate matter (PM) emissions from a medium-speed four-stroke marine engine, operated on both heavy fuel oil (HFO) and distillate (DF), was studied under various operating conditions. PM emission factors for organic matter, elemental carbon (soot), inorganic species variety compounds were determined. In addition, the molecular aromatic analyzed using novel coupling thermal-optical analyzer with resonance-enhanced multiphoton ionization (REMPI) mass...
Abstract Optical spectra below and above the Mott transition of excitons have to be calculated from inhomogeneous integral equation for polarization function including self‐energy, screening, band filling. Results gap shifts, exciton shift, bleaching, continuum enhancement are critically reviewed extended.
Abstract After the discovery of synthetic cannabimimetic substances in ‘Spice’‐like herbal mixtures marketed as ‘incense’ or ‘plant fertilizer’ active compounds have been declared controlled several European countries. As expected, a monitoring new which continue to appear on market revealed that shortly after control measures taken by legal authorities, other were added existing and products. Several aminoalkylindole type detected so far but still their consumption cannot be commonly used...
Abstract. A thermal/optical carbon analyzer equipped with seven-wavelength light source/detector (405–980 nm) for monitoring spectral reflectance (R) and transmittance (T) of filter samples allowed "thermal analysis (TSA)" wavelength (λ)-dependent organic-carbon (OC)–elemental-carbon (EC) measurements. Optical sensing was calibrated transfer standards traceable to absolute R T measurements, adjusted loading effects report absorption (as optical depth (τa, λ)), verified using diesel exhaust...
Analysis of volatile organic compounds (VOCs) in breath holds great promise for noninvasive diagnostic applications. However, concentrations VOCs may change quickly, and actual previous uptakes exogenous substances, especially the clinical environment, represent crucial issues. We therefore adapted proton-transfer-reaction-time-of-flight-mass spectrometry real time analysis environment. For reasons medical safety, a 6 m long heated silcosteel transfer line connected to sterile mouth piece...
Background Ship engine emissions are important with regard to lung and cardiovascular diseases especially in coastal regions worldwide. Known cellular responses combustion particles include oxidative stress inflammatory signalling. Objectives To provide a molecular link between the chemical physical characteristics of ship emission they elicit identify potentially harmful fractions shipping aerosols. Methods Through an air-liquid interface exposure system, we exposed human cells under...
This study was intended to evaluate low-volume (20 mL) multibed needle trap (NTD) sampling combined with heart-cut gas chromatography/mass spectrometry (GC/MS) and comprehensive two-dimensional chromatography/time-of-flight mass (GC × GC/TOF-MS) for trace analysis under clinical conditions. NTDs, high-throughput automatic desorption separation systems, were tested in vitro within a 11 patients undergoing cardiac surgery respect reproducibility, reliability, applicability. NTD−heart-cut GC/MS...