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.
Scanning electron microscope images of the mammal bone and nanocomposite samples. (A) Mammal bone. Scale bar 5 μm; 8000× magnification. (B) 6% chitosan sample, not crosslinked. Note the random indentations and uneven protrusions from the surface, producing a coarse sample. Scale bar 20 μm; 1800× magnification. (C) 6% chitosan sample, crosslinked. The structural surface homogeneity is very similar to the natural mammal bone. Scale bar 3 μm; 15,000× magnification.
