Fig. 11.
Comparison of the changes of concentration in breathing zone with time (a) PSC-0.9, (b) PLT-0.9, (c) PSC-1.1, (d) PLT-1.1, (e) PSC-1.3 and (f) PLT-1.3.
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.