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.
Optical images of the studied membranes: MK-40 (a), MK-4021 (b), MK-4021+3% (c), MK-4021+6% (d), MK-4033+3% (e), MK-4033+6% (f). Parameter b characterizes the roughness of the surface and shows the difference between the highest and lowest areas of the membrane relief.
