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.
Free radical and nicotine yields per cigarette with 300 mg of charcoal of different types (A–C) compared to 300 mg glass beads incorporated in the 1R6F cigarette filter as the plug design. Cigarettes were smoked with the CI standardized smoking regimen. Values are mean ± standard deviation (n = 3–5). Different letters indicate significantly different (p < 0.05) values, and ns indicates not significant.
