An official website of the United States government
Here's how you know
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.
Histograms of elastic modulus assessed by AFM for apical surfaces of five chitosan hydrogel types. The red curves represent the estimation of probability density function using a kernel density estimation