Lee, Byung Uk Sergey. A. Grinshpun 2024-01-13T09:03:19Z 2024-01-13T09:03:19Z 2021-09-29 https://pubs.kist.re.kr/handle/201004/105043 English electric ions respiratory protection ultrafine particle mask penetration efficiency Effect of electric ion emission on the performance of respiratory protection devices 전기적 이온 방출이 호흡기보호필터의 성능향상에 미치는 영향 Conference 2 Proceedings of The Korean Conference on Aerosol and Particle Technology, 7.7-9, 2005 (in Korean), pp.75 - 76 Proceedings of The Korean Conference on Aerosol and Particle Technology, 7.7-9, 2005 (in Korean) 75 76 KO