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Full-Text Articles in Engineering
Differing Effects Of Four Building Materials On Viable Bacterial Communities And Vocs, Gwynne Á. Mhuireach, Leslie Dietz, Willem Griffiths, Patrick Finn Horve, Aurélie Laguerre, Dale Northcutt, Roo Vandegrift, Elliott T. Gall, Kevin Van Den Wymelenberg
Differing Effects Of Four Building Materials On Viable Bacterial Communities And Vocs, Gwynne Á. Mhuireach, Leslie Dietz, Willem Griffiths, Patrick Finn Horve, Aurélie Laguerre, Dale Northcutt, Roo Vandegrift, Elliott T. Gall, Kevin Van Den Wymelenberg
Mechanical and Materials Engineering Faculty Publications and Presentations
Indoor environmental quality is a paramount concern among architects. Exposure to VOCs and microorganisms impacts occupant health, yet the role of materials on these exposures remains poorly understood. In this study, we placed four material types in individual microcosms to test whether material type influences bacterial community structure and VOC emission. We used culture-independent methods to characterize bacterial communities and TD-GC-MS to measure VOC emission. We found that viable bacterial communities had different patterns of abundance, diversity, and composition, in comparison with total (viable plus dead cells) bacterial communities. Examining viable bacteria only, Earth had the highest abundance and diversity, …
Impact Of Green And White Roofs On Air Handler Filters And Indoor Ventilation Air, Pradeep Ramasubramanian, Irvan Luhung, Serene B. Y. Lim, Stephan C. Schuster, Olyssa Starry, Elliott T. Gall
Impact Of Green And White Roofs On Air Handler Filters And Indoor Ventilation Air, Pradeep Ramasubramanian, Irvan Luhung, Serene B. Y. Lim, Stephan C. Schuster, Olyssa Starry, Elliott T. Gall
Mechanical and Materials Engineering Faculty Publications and Presentations
Rooftop surfaces near building outdoor air intakes may contribute to the mass loading on filters and compounds emitted to ventilation air downstream of the filter. In laboratory analyses, we characterized microbial composition, primary volatile organic compound (VOC) emissions, ozone removal rates, and VOC emissions in the presence of ozone on filters collected from air handlers located on the green and white roof sections of a big-box retail store. Total DNA masses per area of filter were 26.3 ± 11.9 ng cm−2 and 6.3 ± 6.5 ng cm−2 for green and white roof filters respectively, with higher mass observed in winter …