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Effect of relative humidity on the aerodynamic diameter and respiratory deposition of fungal spores

Reponen, T., Willeke, K., Ulevicius, V., Reponen, A. and Grinshpun, S. A.
1996
Atmospheric Environment, 30, 23, p 3967-3974

Reponen, T., Willeke, K., Ulevicius, V., Reponen, A. and Grinshpun, S. A., (1996), "Effect of relative humidity on the aerodynamic diameter and respiratory deposition of fungal spores", Atmospheric Environment, 30, 23, p 3967-3974.
Abstract:
Exposure to airborne fungal spores may cause respiratory symptoms. The hygroscopicity of airborne spores may significantly affect their aerodynamic diameter, and thus change their deposition pattern in the human respiratory tract. The authors have investigated the change in aerodynamic diameter of five different fungal species as a function of relative humidity. Liquid and dry dispersion methods were explored for the aerosolization of the fungal spores. A new system that produces non-aggregated spore aerosol directly from a moldy surface was designed and found suitable for this study. The spores were aerosolized from a mold growth on agar by ducting dry air over the surface, and spore chains in the flow were broken up by passing the entire flow through a critical orifice. Size-spectrometric measurements were conducted with an Aerodynamic Particle Sizer.
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Author Information and Other Publications Notes
Reponen, T.
Dr.Tiina Reponen, Research Associate Professor Department of Environmental Health University of Cincinnati
     
Willeke, K.
  1. Aerosol characteristics of airborne actinomycetes and fungi
  2. Bioaerosol collection by a new electrostatic precipitator
  3. Characteristics of airborne actinomycete spores
  4. Collection of airborne microorganisms by a new electrostatic precipitator
  5. Collection of bioaerosol particles by impaction: effect of fungal spore agglomeration and bounce
  6. Collection of fungal spores on air filters and spore reentrainment from filters into air
  7. Development and evaluation of aerosol generators for biological materials
  8. Effect of impact stress on microbial recovery on an agar surface
  9. Evaluation of a new personal sampler for enumerating airborne spores
  10. Fungal fragments as indoor air biocontaminants
  11. Improved aerosol collection by combined impaction and centrifugal motion
  12. Inlet sampling efficiency of bioaerosol samplers
  13. Long-term sampling of airbome bacteria and fungi into a non-evaporating liquid
  14. Performance characteristics of the button personal inhalable aerosol sampler
  15. Performance of Air-O-Cell, Burkard, and Button samplers for total enumeration of airborne spores
  16. Performance of bioaerosol samplers: collection characteristics and sampler design considerations
  17. Release of lead-containing particles from a wall enclosure
  18. Release of Streptomyces albus propagules from contaminated surfaces
  19. Source strength of fungal spore aerosolization from moldy building material
  20. Techniques for dispersion of microorganisms into air  
Ulevicius, V.
  1. Development and evaluation of aerosol generators for biological materials
  2. Effect of impact stress on microbial recovery on an agar surface
  3. Techniques for dispersion of microorganisms into air  
Reponen, A.
  1. Field Testing of New Aerosol Sampling Method With a Porous Curved Surface as Inlet  
Grinshpun, S. A.
  1. Aerodynamic versus physical size of spores: measurement and implication for respiratory deposition
  2. Aerosol characteristics of airborne actinomycetes and fungi
  3. Bioaerosol collection by a new electrostatic precipitator
  4. Characteristics of airborne actinomycete spores
  5. Collection of airborne microorganisms by a new electrostatic precipitator
  6. Collection of airborne spores by circular single-stage impactors with small jet-to-plate distance
  7. Collection of bioaerosol particles by impaction: effect of fungal spore agglomeration and bounce
  8. Collection of fungal spores on air filters and spore reentrainment from filters into air
  9. Development and evaluation of aerosol generators for biological materials
  10. Effect of impact stress on microbial recovery on an agar surface
  11. Evaluation of a new personal sampler for enumerating airborne spores
  12. Field Testing of New Aerosol Sampling Method With a Porous Curved Surface as Inlet
  13. Fungal fragments as indoor air biocontaminants
  14. Fungal spore source strength tester: laboratory evaluation of a new concept
  15. Improved aerosol collection by combined impaction and centrifugal motion
  16. Inlet sampling efficiency of bioaerosol samplers
  17. Long-term sampling of airbome bacteria and fungi into a non-evaporating liquid
  18. Performance characteristics of the button personal inhalable aerosol sampler
  19. Performance of Air-O-Cell, Burkard, and Button samplers for total enumeration of airborne spores
  20. Release of lead-containing particles from a wall enclosure
  21. Release of Streptomyces albus propagules from contaminated surfaces
  22. Techniques for dispersion of microorganisms into air  


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