An official website of the United States government
Here's how you know
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.
Visualization (SEM) of disorganized zones after 0.5 h (A and A′), 1 h (B and B′), 2 h (C and C′), and 4 h (D and D′) of incubation. (Magnification: A–D, 2,000×; A′–D′, 5,000×.)