Figure 4.
Fourier transform infrared spectroscopy (FTIR) spectra of TB, CE, and HME systems. The chemical structure of TB is shown, and their functional groups are shaded and numbered accordingly.
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.