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Träfflista för sökning "AMNE:(ENGINEERING AND TECHNOLOGY Industrial Biotechnology) srt2:(2000-2004)"

Sökning: AMNE:(ENGINEERING AND TECHNOLOGY Industrial Biotechnology) > (2000-2004)

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  • Griss, Patrick, et al. (författare)
  • Spiked biopotential electrodes
  • 2000
  • Ingår i: IEEE International Workshop on Micro Electromechanical Systems (MEMS2000), Miyazaki, Japan, Jan. 23-27. ; , s. 323-328
  • Konferensbidrag (refereegranskat)
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  • Mattsson, Magnus, et al. (författare)
  • Effect of Particulate Air Cleaners on the Content of airborne Dust and Cat Allergen in Classrooms
  • 2004
  • Ingår i: Roomvent 2004. - 9729797323
  • Konferensbidrag (refereegranskat)abstract
    • Electrostatic air cleaners (precipitators) were tested in four classrooms during ordinary lessons for four weeks. Airborne dust in the classrooms was collected on filters using two different kinds of samplers: IOM-sampler and a new kind of ionizing sampler. The amount of collected dust was evaluated by visual inspection (“filter blackening”) and the content of cat allergen was measured using an amplified ELISA assay. It was found that the filter blackening was 64% lower when the air cleaners were active than when they where inactive (p<0.001). This suggests that the air cleaners were effective in reducing the content of airborne particulate matter. The reduction in cat allergen appeared however to be less substantial. The variance of the allergen data was unexpectedly large, presumably due to relatively few allergen-carrying particles in the sampled air. It is believed that larger sampling volumes are needed to get more reliable data of airborne cat allergen in spaces where the allergen is emitted indirectly.
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  • Mattsson, Magnus, et al. (författare)
  • Mixing and displacement ventilation compared in classrooms; distribution of particles, cat allergen and CO2
  • 2003
  • Ingår i: Proceedings from Healthy Buildings 2003. ; , s. 458-464
  • Konferensbidrag (refereegranskat)abstract
    • Mixing ventilation and displacement ventilation were compared in an intervention study in classrooms. Particles, cat allergen and CO2, were measured in classroom air at different levels above the floor, during regular lessons. With mixing ventilation, the particle concentration tended to decrease with height, with a stronger gradient occurring for larger particles. With displacement ventilation, the particle concentration increased with height, except for particles >25 µm. The displacement system thus tended to have a slight upward displacement effect on most of the particles. Significant correlations were found between concentrations of cat allergen and particles in the size fraction 1–10 µm. The particle and cat allergen concentration at breathing height did not, however, differ significantly between the two ventilation systems. CO2 was about 10% lower with displacement ventilation. A fairly high level of physical activity of the pupils is believed to have had significant dispersing effect on the airborne contaminants.
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  • Griss, Patrick, et al. (författare)
  • Barbed Spikes for Mechanical Chip Attachment
  • 2001
  • Ingår i: IEEE International Workshop on Micro Electromechanical Systems (MEMS2001), Interlaken, Switzerland, Jan. 21-25. ; , s. 46-49
  • Konferensbidrag (refereegranskat)
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