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.
Detail of the final network from Fig. 1f. The network is characterized by the three types of particles shown in the figure. Termini touch only one other particle; trunk particles touch exactly two other particles; and branching points touch three or more particles.
