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 Comparison of transparent strips made from initial OSP. b OSP after ultrasound treatment. CNF films prepared after hydrolysis by sulfuric acid of concentration 43% at (c) 20 °C, 30 min; d 20 °C, 60 min; e 60 °C, 30 min; f and 60 °C, 60 min. The duration of ultrasound treatment all patterns was 30 min
