FIGURE 14.
Scanning electron micrograph of 7.5% (w/v) PA gel. The scale bar corresponds to a distance of 300 nm. Gel specimens were prepared using freeze drying followed by carbon coating. Images were obtained at 3 kV on a Hitachi S4500.
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.