Figure 2.
The FTIR spectra of NL, PU-NL, EEP, and PU-NL/EEP.
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.