Experimental Studies on the Classification of Airborne Particles Based on Their Optical Properties

Choi, Kibong; Koh, Young Jin; Jeong, Young‐Su; Chong, Eugene

doi:10.1002/bkcs.11396

Cited by 3 publications

(2 citation statements)

References 21 publications

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“…BG spores, E. coli , P. citrinum, and A. niger showed fluorescence at 333, 337, 357.5, and 355 nm, respectively; the fluorescence intensity that distinguished them from dust was identified. These results were similar to the results reported in other studies . In the fluorescence measurements at an excitation wavelength of 350 nm, all particles exhibited fluorescence lower than that obtained at 270 nm, as shown in Figure (b).…”

Section: Resultssupporting

confidence: 92%

Optical Characteristics of Micro‐sized Biological Aerosol Particles

Koh

Jeong

Chong

2019

Bulletin Korean Chem Soc

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In this work, an ultraviolet C (UVC)-light emitting diode (LED)-based technology for hazardous biological particle detection was developed by analyzing the specific scattering and fluorescence signal characteristics of various particles generated by a 275 nm UVC excitation light source. An experimental apparatus based on laser-induced fluorescence (LIF), comprising LED and PMT, was used. Experimental results for each type of particle studied showed that the ratio of scattering and fluorescence was 22-89% for microsized clustered biological aerosol particles and 12% for non-biological particles. It was confirmed that the presence of micro-sized biological and non-biological aerosol particles can be determined based on their fluorescence characteristics in the UV region. Hence, this study demonstrates the feasibility of hazardous biological particle detection in the UV region by using a LED-based technology, which is both inexpensive and highly efficient.

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Section: Resultssupporting

confidence: 92%

Optical Characteristics of Micro‐sized Biological Aerosol Particles

Koh

Jeong

Chong

2019

Bulletin Korean Chem Soc

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“… Choi et al (2018) classified the airborne particle according to their optical properties by using experimental methods. Ink-jet aerosol generator (IJAG) was used to generate, dry the airborne particle, the light-scattering signal was used to estimate the correlation value in the classification analysis of airborne particles.…”

Section: Epidemic Theories and Experimental Methodsmentioning

confidence: 99%

The role of computational fluid dynamics tools on investigation of pathogen transmission: Prevention and control

Peng

Chen

Liu

2020

Science of The Total Environment

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Transmission mechanics of infectious pathogen in various environments are of great complexity and has always been attracting many researchers' attention. As a cost-effective and powerful method, Computational Fluid Dynamics (CFD) plays an important role in numerically solving environmental fluid mechanics. Besides, with the development of computer science, an increasing number of researchers start to analyze pathogen transmission by using CFD methods. Inspired by the impact of COVID-19, this review summarizes research works of pathogen transmission based on CFD methods with different models and algorithms. Defining the pathogen as the particle or gaseous in CFD simulation is a common method and epidemic models are used in some investigations to rise the authenticity of calculation. Although it is not so difficult to describe the physical characteristics of pathogens, how to describe the biological characteristics of it is still a big challenge in the CFD simulation. A series of investigations which analyzed pathogen transmission in different environments (hospital, teaching building, etc) demonstrated the effect of airflow on pathogen transmission and emphasized the importance of reasonable ventilation. Finally, this review presented three advanced methods: LBM method, Porous Media method, and Web-based forecasting method. Although CFD methods mentioned in this review may not alleviate the current pandemic situation, it helps researchers realize the transmission mechanisms of pathogens like viruses and bacteria and provides guidelines for reducing infection risk in epidemic or pandemic situations.

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