id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-292129-m1ookq0l	Lee, Shu-An	Respiratory Performance Offered by N95 Respirators and Surgical Masks: Human Subject Evaluation with NaCl Aerosol Representing Bacterial and Viral Particle Size Range	2008-03-07		.txt	text/plain	5135	264	52	Objectives: This study aimed at determining the protection factors (PFs) provided by N95 filtering facepiece respirators and surgical masks against particles representing bacterial and viral size ranges (aerodynamic size: 0.04–1.3 μm). Methods: The protection levels of N95 filtering facepiece respirators (four models) and surgical masks (three models) were investigated while they were donned by 12 subjects performing the OSHA (US Occupational Safety and Health Administration) fit-testing exercises in a test chamber. In this study, the number concentrations of NaCl particles (challenge aerosol) were size-selectively measured using the ELPI, so that the protection levels provided by N95 filtering facepiece respirators and surgical masks were determined when human subjects donned the tested respirators and performed the OSHA fit-testing exercises: normal breathing, deep breathing, turning head side to side, moving head up and down, talking, grimace, bending over and returning to normal breathing (Department of Labor, Occupational Safety and Health Administration, 1998) .	./cache/cord-292129-m1ookq0l.txt	./txt/cord-292129-m1ookq0l.txt