Figure 6.
Macroscopic observation of PUR coupons (6 × 3 cm) after different physical treatments. 1, autoclaving 15 min at 121 °C. 2, no treatment (control). 3, UV-C exposure for 24 h at 254 nm.
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.