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Table 2 Fibre counting by electron microscopy

From: ROS-mediated genotoxicity of asbestos-cement in mammalian lung cells in vitro

Sample Suspension WHO-fibre counts TEM
  mg/ml Filter deposit   F/mg F/ml Magnification, Number of fields
  Original Diluted μg/cm2 n ×106 ×106  
Asbestos cement 11 0.05 73.2 14 38.3 425 ×10000, 10 fields
     34 12.9 144 ×2000, 2 fields
UICC-chrysotile 5 0.01 13.2 32 486 2432 ×10000, 10 fields
     33 139 697 ×2000, 1 field