2.7.2 Characterization of RHC and RHC/EGF freeze-dried dressing
The morphologies and properties of the freeze-dried dressing were characterized by scanning electronic microscope (SEM). Before the SEM observation, the freeze-dried dressing was subjected to gold sputtering using a gold spray carbonator, and the micromorphology of RHC and RHC/EGF freeze-dried dressing was observed by scanning electron microscopy (SEM, XL30; Philips, Amsterdam, The Netherlands).