Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Representative SEM images of the cross-section of skin tissues before and after immersion in the pretreatment solution. The upper image shows the presence or absence of the epidermal layer, and the lower image shows the dermis. Scale bar: 1 mm (upper) and 1 μm (bottom). SEM, scanning electron microscopy
