id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
cord-022504-tk7v4hoj	nan	Environmental and safety issues with nanoparticles	2012-03-16		.txt	text/plain	14098	656	50	Where f is the characteristic function that expresses particle size, particle concentration, particle composition, and so on [2, 3] . Influence of particle diameter on lower limit of particle concentration for explosion.	cache/cord-022504-tk7v4hoj.txt	txt/cord-022504-tk7v4hoj.txt
