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.
Each value represents the mean of six independent assays with standard deviation. Statistical analysis was conducted at each LD output power. Significant difference (p<0.01) between the two groups is demonstrated by the different alphabetical letter (i.e., bars with the same letter are not significantly different).
