Figure 12.
Digital images of the 4 types of immobilized granules (a) PVA (b) SA (c) PVA–SA (d) WPU [47]. Copyright © (2015) Royal Society of Chemistry.
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.