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- W2936685912 abstract "Fungal spores are among the most predominant microorganisms present in ambient air and can potentially affect human health, vegetation and climate. However, a quantitative model representing passive release mechanism of such terrestrial filamentous fungi is still critically lacking. In this study, a combined experimental and mathematical modeling approach has been applied to characterize the dynamic response of passive release of spores upon exposure to air. The spore flux was observed to decrease with time when exposed to constant air velocity. The flux also displayed a cyclic behavior in response to velocity cycles. Based on the visual observations of the test surface that the conidiophore bend during air flow, the behavior of the fungal spores is explained in terms of the velocity gradient and the corresponding drag force acting on the conidiophores. The decrease in the observed spore flux with time was strongly correlated with the visual observations of the bending of the fungal conidiophore during airflow. These observations clearly suggest that the velocity and the drag on the spore corresponding to a bent conidiophore are smaller than that of a vertical conidiophore and consequently results in a smaller spore flux from a bent conidiophore. Based on the developed model, an important parameter, representing the energy required to aerosolize spores from the conidiophores was also determined (5.58 μJ for Penicillium chrysogenum). The model was refined to incorporate different scenario based on the experimental observations." @default.
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- W2936685912 date "2019-07-01" @default.
- W2936685912 modified "2023-09-30" @default.
- W2936685912 title "Dynamic response of passive release of fungal spores from exposure to air" @default.
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- W2936685912 doi "https://doi.org/10.1016/j.jaerosci.2019.04.005" @default.
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