Fig. 2. SEM morphological observations. FS: (A) general view; (B) profile view; (C) positive view; (D) negative view. BG: (E) general view; (F) profile view; (G) positive view; (H) negative view; (B–D and F–H). Magnification: 2000×.
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.