Publications by authors named "J G Slowik"
In this paper, the first e-nose system coupled with machine learning algorithm for noninvasive measurement of total cholesterol level based on exhaled air sample was proposed. The study was conducted with the participation of 151 people, from whom a breath sample was collected, and the level of total cholesterol was measured. The breath sample was examined using e-nose and gas sensors, such as TGS1820, TGS2620, TGS2600, MQ3, Semeatech 7e4 NO2 and 7e4 H2S, SGX_NO2, SGX_H2S, K33, AL-03P, and AL-03S.
View Article and Find Full Text PDFBiomass burning (BB) is a major source of aerosols and black carbon, thereby exerting an important impact on climate and air quality. Levoglucosan is the most well-recognized organic marker compound of BB and has been used to quantitatively assess BB's contribution to ambient aerosols. However, little is known about levoglucosan's evaporation under atmospheric conditions, primarily due to the uncertainty of its effective saturation vapor concentration (*) and its unknown activity coefficient (γ), in the complex BB emission matrix.
View Article and Find Full Text PDFArticle Synopsis
- VOCs play a crucial role in forming secondary organic aerosol (SOA), but understanding this process, particularly regarding oxygenated VOCs (OVOCs) and SOA composition, remains complex.
- In summer 2016, researchers used advanced mass spectrometry techniques in Zurich to analyze VOCs and their oxidation products, identifying five sources of these compounds, primarily from traffic and local emissions, as well as various atmospheric oxidation processes.
- The findings revealed that both gas phase and aerosol phase OVOCs exhibited similar patterns and characteristics, particularly indicating that biogenic contributions dominated the SOA and that there were distinct differences in chemical behavior between day and night.
Article Synopsis
- Over 300 daily PM filter samples were collected in Xi'an and Chongqing from October 2019 to May 2020 to analyze organic aerosol composition using dual mass spectrometric techniques.
- Seven distinct sources of water-soluble organic aerosols were identified, including dust and solid fuel combustion-related sources, with consistent findings across both mass spectrometry methods.
- The study highlights the significance of these techniques for understanding air pollution sources, which is crucial for future research, health studies, and air quality management policies.
Objectives: Normal weight obesity can be associated with an increased risk of metabolic abnormalities, systemic inflammation and mortality. The main aim of the study was to analyze the changes in the prevalence of normal weight obesity in 8-18-year-olds from Kraków (Poland) between 2010 and 2020.
Methods: The study was based on two sets of cross-sectional, school-based data obtained in 2010 and 2020.