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.
(a) Chemical composition of System I hydrogels in different pH states; (b) variation of the volume degree of swelling with pH for different compositions of hydrogels; (c) optical micrographs showing the change in diameter of DB4 hydrogels at pH 2.6 and 9.6.
