id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
cord-340639-hdn85mik	Uk Lee, Byung	Unipolar ion emission enhances respiratory protection against fine and ultrafine particles	2004-11-30		.txt	text/plain	3790	135	44	It was surprising to observe that the initial penetration e ciency (t=0) of ultraÿne particles through both masks slightly increased with decreasing particle size. This allows testing the performance of respirator ÿlters against pathogenic agents using non-pathogenic aerosol surrogates that simulate the aerodynamic characteristics of the particles of interest.	cache/cord-340639-hdn85mik.txt	txt/cord-340639-hdn85mik.txt
