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.
Reaction scheme of the acrylic acid (AA) and gum tragacanth composite hydrogel, crosslinked by N,N′‐methylenebisacrylamide (MBA) and fluorescein diacrylate (Fl‐DA). Adapted with permission.[ 74 ] Copyright 2020, The Royal Society of Chemistry.
