Sim, Kyoung Mi Lee, Hee Ju Nho, Chu Won Bae, Gwi-Nam Jung, Jae Hee 2024-01-20T10:04:20Z 2024-01-20T10:04:20Z 2021-09-04 2014-03-04 0278-6826 https://pubs.kist.re.kr/handle/201004/127009 Bioaerosols, such as bacterial and fungal cells and their spores, are components of indoor airborne particulate matter and have been associated with human health problems as well as various environmental issues. Natural antimicrobial products have been used in air filters for bioaerosol control. However, natural products may lose some function due to their sensitivity to environmental factors such as temperature and humidity. In this study, we investigated the effects of temperature on antimicrobial fiber filters coated with nanoparticles of a natural product, namely, Sophora flavescens extract. Inactivation efficiency decreased with increasing temperature and treatment time. A quantitative chemical analysis of the filters revealed that the quantities of antimicrobial compounds decreased noticeably, with a consequent decrease in antimicrobial activity. In addition, the S. flavescens nanoparticles on the filter fiber surface melted gradually as treatment time increased at temperatures >100 degrees C. This change in nanoparticle morphology in turn affected the pressure and filtration efficiency of filters, both of which decreased with increasing temperature and treatment time. These results could provide a scientific basis for the improvement of indoor air-quality control using antimicrobial air filters coated with S. flavescens nanoparticles. Copyright 2014 American Association for Aerosol Research English TAYLOR & FRANCIS INC ULTRAVIOLET GERMICIDAL IRRADIATION ESCHERICHIA-COLI BACILLUS-SUBTILIS STAPHYLOCOCCUS-AUREUS PRENYLATED FLAVONOIDS BACTERIA BIOAEROSOLS AEROSOL-PARTICLES TEA TREE INACTIVATION KURARINONE Effects of Surrounding Temperature on Antimicrobial Air Filters Coated with Sophora flavescens Nanoparticles Article 10.1080/02786826.2013.870660 1 AEROSOL SCIENCE AND TECHNOLOGY, v.48, no.3, pp.324 - 332 AEROSOL SCIENCE AND TECHNOLOGY 48 3 324 332 scie scopus 000330105200008 2-s2.0-84893143503 Engineering, Chemical Engineering, Mechanical Environmental Sciences Meteorology & Atmospheric Sciences Engineering Environmental Sciences & Ecology Meteorology & Atmospheric Sciences Article ULTRAVIOLET GERMICIDAL IRRADIATION ESCHERICHIA-COLI BACILLUS-SUBTILIS STAPHYLOCOCCUS-AUREUS PRENYLATED FLAVONOIDS BACTERIA BIOAEROSOLS AEROSOL-PARTICLES TEA TREE INACTIVATION KURARINONE antimicrobial filter natural product temperature sophora flavescens