Figure 1.
Scanning electron microscopy (SEM) images displaying microparticles MB1 (A, B) and MB2 (C, D) (original magnification: A, C, ×2000 and B, ×6000, D, ×8000).
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.