two different methods were used to visualize the er : thin ( 0.08 mum ) sections of tissue fixed in formaldehyde and glutaraldehyde and post-fixed with osmium tetroxide , and thick ( 1 mum ) sections of tissue fixed in buffered aldehyde and post-fixed with zinc iodide-osmium tetroxide ( zio ) .
C0017814
glutaraldehyde
C0001992
aldehyde