Figure 4.
Content of (a) alkyl groups, (b) alkoxy groups, (c) carbonyl groups, and (d) hydroxyl groups at different temperatures in raw and BHT-Coal.
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.