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Sökning: WFRF:(Wierzbicka Aneta)

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  • Ciuzas, Darius, et al. (författare)
  • Characterization of indoor aerosol temporal variations for the real-time management of indoor air quality
  • 2015
  • Ingår i: Atmospheric Environment. - : Elsevier BV. - 1352-2310. ; 118, s. 107-117
  • Tidskriftsartikel (refereegranskat)abstract
    • The study presents the characterization of dynamic patterns of indoor particulate matter (PM) during various pollution episodes for real-time IAQ management. The variation of PM concentrations was assessed for 20 indoor activities, including cooking related sources, other thermal sources, personal care and household products. The pollution episodes were modelled in full-scale test chamber representing a standard usual living room with the forced ventilation of 0.5 h(-1). In most of the pollution episodes, the maximum concentration of particles in exhaust air was reached within a few minutes. The most rapid increase in particle concentration was during thermal source episodes such as candle, cigarette, incense stick burning and cooking related sources, while the slowest decay of concentrations was associated with sources, emitting ultrafine particle precursors, such as furniture polisher spraying, floor wet mopping with detergent etc. Placement of the particle sensors in the ventilation exhaust vs. in the centre of the ceiling yielded comparable results for both measured maximum concentrations and temporal variations, indicating that both locations were suitable for the placement of sensors for the management of IAQ. The obtained data provides information that may be utilized considering measurements of aerosol particles as indicators for the real-time management of IAQ. (C) 2015 Elsevier Ltd. All rights reserved.
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18.
  • Dierschke, Katrin, et al. (författare)
  • Acute respiratory effects and biomarkers of inflammation due to welding-derived nanoparticle aggregates
  • 2017
  • Ingår i: International Archives of Occupational and Environmental Health. - : Springer Science and Business Media LLC. - 0340-0131 .- 1432-1246. ; 90:5, s. 451-463
  • Tidskriftsartikel (refereegranskat)abstract
    • Welders are exposed to airborne particles from the welding environment and often develop symptoms work-related from the airways. A large fraction of the particles from welding are in the nano-size range. In this study we investigate if the welders' airways are affected by exposure to particles derived from gas metal arc welding in mild steel in levels corresponding to a normal welding day. In an exposure chamber, 11 welders with and 10 welders without work-related symptoms from the lower airways and 11 non-welders without symptoms, were exposed to welding fumes (1 mg/m(3)) and to filtered air, respectively, in a double-blind manner. Symptoms from eyes and upper and lower airways and lung function were registered. Blood and nasal lavage (NL) were sampled before, immediately after and the morning after exposure for analysis of markers of oxidative stress. Exhaled breath condensate (EBC) for analysis of leukotriene B4 (LT-B4) was sampled before, during and immediately after exposure. No adverse effects of welding exposure were found regarding symptoms and lung function. However, EBC LT-B4 decreased significantly in all participants after welding exposure compared to filtered air. NL IL-6 increased immediately after exposure in the two non-symptomatic groups and blood neutrophils tended to increase in the symptomatic welder group. The morning after, neutrophils and serum IL-8 had decreased in all three groups after welding exposure. Remarkably, the symptomatic welder group had a tenfold higher level of EBC LT-B4 compared to the two groups without symptoms. Despite no clinical adverse effects at welding, changes in inflammatory markers may indicate subclinical effects even at exposure below the present Swedish threshold limit (8 h TWA respirable dust).
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19.
  • Ekberg, Lars, 1962, et al. (författare)
  • Buildings Post Corona
  • 2022
  • Ingår i: The REHVA European HVAC Journal. - 1307-3729. ; 59:2, s. 19-21
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • Buildings Post Corona is a Swedish collaborative research project between Chalmers, KTH Royal Institute of Technology, Lund, and Umeå Universities. The project supports the building sector in designing and maintaining sustainable buildings with a healthy and good indoor environment. The COVID-19 crisis has stressed the importance and urge of this research, which is financially supported by FORMAS (a governmental research council for sustainable development https://formas.se)
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20.
  • Ekberg, Lars, et al. (författare)
  • Covid 19 guidance for the Swedish construction and real estate sectors : results from a survey study
  • 2023
  • Ingår i: The REHVA European HVAC Journal. - 1307-3729. ; 60:2, s. 18-20
  • Tidskriftsartikel (populärvet., debatt m.m.)abstract
    • Buildings Post Corona is a Swedish collaborative research project between Chalmers, KTH Royal Institute of Technology, Lund, and Umeå Universities. The project intends to provide knowledge related to designing, maintaining and operating sustainable buildings with a healthy and good indoor environment.The project aims to contribute to the knowledge and processes needed for the construction and real-estate sectors to meet the needs of the post-pandemic era.In this article, the authors describe the approach in the study and its results.
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