an enhanced staining of cellular organelles and cytoplasmic matrix is observed when ultrathin sections for electron microscopy are stained for 1-5 min in fresh reynolds ' lead citrate , rinsed in distilled water and dried prior to staining with a saturated solution of uranyl acetate ( 40 min ) and reynolds ' lead citrate ( 20 min ) , daddow ( 1983 ) .
C0007634
cellular
C1383501
cytoplasmic matrix