A5053829530- Atmospheric chemistry and aerosols
- Atmospheric aerosols and clouds
- Air Quality Monitoring and Forecasting
- Air Quality and Health Impacts
- Electrohydrodynamics and Fluid Dynamics
- Coagulation and Flocculation Studies
- Mass Spectrometry Techniques and Applications
- Chemical Synthesis and Analysis
- Chemical Synthesis and Reactions
- Particle Dynamics in Fluid Flows
- nanoparticles nucleation surface interactions
- Advanced machining processes and optimization
- Aerosol Filtration and Electrostatic Precipitation
- Manufacturing Process and Optimization
- Metal Alloys Wear and Properties
- Atmospheric Ozone and Climate
- Mechanical and Thermal Properties Analysis
- Cyclone Separators and Fluid Dynamics
- Asymmetric Synthesis and Catalysis
- Chemical Reaction Mechanisms
- Microfluidic and Capillary Electrophoresis Applications
- Synthesis and Reactions of Organic Compounds
- Tribology and Wear Analysis
- Analytical Chemistry and Chromatography
- Forest ecology and management
University of Vienna
2013-2023
Kasetsart University
2017-2023
University of Life Sciences in Poznań
2009-2015
University of Life Sciences in Lublin
2012
TU Wien
2007-2008
Medical University of Vienna
2008
Max Perutz Labs
2008
FH Campus Wien
2001
University of Minnesota
1985-1990
University of Minnesota System
1984
This study explores the potential of a novel electrospray-based method, termed gas-phase electrophoretic mobility molecular analysis (GEMMA), allowing mass determination peptides, proteins and noncovalent biocomplexes up to 2 MDa (dimer immunglobulin M). The macromolecular ions were formed by nano electrospray ionization (ESI) in 'cone jet' mode. multiple charged state monodisperse droplets/ions generated was reduced means bipolar ionized air (generated an alpha-particle source) yield...
Dextran is widely exploited in medical products and as a component of drug-delivering nanoparticles (NPs). Here, we tested whether dextran can serve the main substrate NPs form stable backbone. We dextrans with several molecular masses under synthesis conditions to optimize NP stability. The analysis obtained showed that were synthesized from 70 kDa 5% degree oxidation polysaccharide chain 50% substitution dodecylamine formed backbone composed modified subunits, mean diameter which an...
A key concern related to particulate air pollution is the development of an early warning system that can predict local PM2.5 levels and excessive concentration episodes using vertical meteorological factors. Machine learning (ML) algorithms, particularly those with recognition tasks, show great potential for this purpose. The objective study was compare performance multiple linear regression (MLR) multilayer perceptron (MLP) in predicting levels. software trained up 7 days advance data from...
In this work we present the characterization of PAMAM dendrimers from generation two (G2) up to ten (G10) with a focus on G5−G10 matrix-assisted laser desorption/ionization linear mass spectrometry (MALDI−MS) and nanoelectrospray gas-phase electrophoretic mobility molecular analysis (nES−GEMMA). For first time masses high-mass G8−G10 were determined by MALDI−MS nES−GEMMA, techniques which are based different physicochemical principles. Obtained experimental data allows determination (up 580...
Abstract The performance of a narrow‐angle and wide‐angle, forward scattering laser aerosol spectrometer has been studied as function particle size refractive index. results have compared with theoretical calculations based on light theory. indicate that for the instrument, scattered‐light intensity is not monotonic transparent particles (a relationship required unambiguous measurement) above 0.7 μm. instrument therefore limited in its useful range to distribution measurement between 0.2 μm...
Differential mobility analysis (DMA) is a technique suited for size as well preparative collection of airborne nanosized particles. In the recent decade, intact viruses, proteins, DNA fragments, polymers, and inorganic nanoparticles was possible when combining this method with nano-electrospray charge-reduction source producing aerosols from sample solution/suspensions. Mass high molecular weight noncovalent complexes also methodology due to linear correlation electrophoretic diameter mass....
We present a modelled approach of scattering contribution to the radiation transmission through medium, such as an aerosol, yielding correction term Lambert-Beer law. The is essential because certain amount forward scattered light flux always overlaid on transmitted radiation. Hence it enters together with attenuated beam into finite aperture any detector system and therefore constitutes potential problem in inversion measured data. This depends not only geometry measuring but also...
During the 1979 workshop of working group on ultrafine aerosols, different experimental techniques for measuring number concentration and size aerosol particles were compared. In present paper we report a comparison particle aerosols. Well-defined monodisperse aerosols with electrical mobility diameters ranging from 13 to 100 nm generated using an classifier. Kelvin-equivalent distributions these determined by means process-controlled expansion chamber, size-analyzing nuclei counter (SANC)....
Gas-phase electrophoretic mobility molecular analysis (GEMMA) separates nanometer-sized, single-charged particles according to their (EM) diameter after transition the gas-phase via a nano electrospray process. Electrospraying as soft desorption/ionization technique preserves noncovalent biospecific interactions. GEMMA is therefore well suited for of intact viruses and subviral targeting questions related particle size, bioaffinity, purity preparations. By correlating EM mass (Mr) standards,...
Attachment of a nonaggregating monoclonal antibody and soluble recombinant receptor molecule to the icosahedral nonenveloped human rhinovirus serotype 2 was studied with nanoelectrospray ionization gas-phase electrophoretic molecular mobility analyzer (nESI-GEMMA). The virus mass, as determined via nESI-GEMMA, within instrument accuracy (±6%) close theoretical value (8 × 106 Da) calculated from sum all constituents one particle (60 copies each four viral capsid proteins, RNA genome, copy...
Three bipolar aerosol chargers, an AC-corona (Electrical Ionizer 1090, MSP Corp.), a soft X-ray (Advanced Aerosol Neutralizer 3087, TSI Inc.), and α-radiation-based 241Am charger (tapcon & analysesysteme), were investigated on their charging performance of airborne nanoparticles. The probabilities for negatively positively charged particles the particle size conservation measured in diameter range 5-40 nm using sucrose Chargers operated under various flow conditions 0.6-5.0 liters per...
Nanosized silica size standards produced with a sol–gel synthesis process were evaluated for particle size, effective density, and refractive index in this study. Particle density measurements conducted following protocol from the National Institute of Advanced Industrial Science Technology (AIST) Japan. sizes measured via electrical mobility analysis using differential analyzer (DMA) at sheath flow rates (Qsh) 3.0 6.0 L/min constant aerosol rate (Qa) 0.3 L/min. The mean mode diameters...
Particle size measurement by means of optical spectrometry single particles depends substantially on the angular range light scattering and refractive index particle. Knowledge latter determines implicitly accuracy measurement. In contrast to commonly used instrumental systems configuration design concept presented here consists two laser illumination sources with different wavelengths four ranges for collection scattered light. As a result set independent pulses from each measured particle...
The article presents experimental results and theoretical analysis of aerosol nanoparticle penetration through fibrous filters with a broad fiber diameter distribution. Four were produced using the melt-blown technique. filters' SEM images indicated that they had log-normal Five kinds proteins two types silica particles generated by electrospraying then classified Parallel Differential Mobility Analyzer to obtain well-defined, monodisperse, singly charged challenge aerosols diameters ranging...
Two ISO standard methods for in-stack sampling and measurement of PM2.5 PM10 mass concentrations in flue gas from stationary sources were published 2009 (ISO 23210, conventional cascade impactors) 2012 13271, virtual impactors). The performances these two terms separation efficiency the accuracy measured concentration compared at same point conditions both using laboratory-scale model with different dust real sampled a test facility pulverized coal combustion. impactor showed very...
Asian megacities are undergoing rapid population and infrastructure growth, which is resulting in significant air quality problems linked to atmospheric fine particles (PM2.5). This study focuses on characterizing carbonaceous aerosols an urban area of Bangkok, Thailand. The Microclimate Air Pollutants Monitoring tower located the edge Kasetsart University campus was used perform vertical measurements. Mass concentration data were collected using dust monitors (ADR1500) at different levels...