Figure 8.
The changes in filtration efficiency of B1–B4 samples with loading time. Error bars are omitted for better readability.
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.