Figure 7.
Structure of most common natural polymers: cellulose (a), lignin (b) and chitin (c). Reprinted from references [83] with permission from Elsevier.
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.