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.
Effect of oyster shell extract on cytotoxicity in Raw 264.7 cells. Cells in 96-well plates (2×104 cells/well) were incubated with and without indicated concentrations of oyster shell extract for 20 h. Each value is expressed as mean±SD in triplicate experiment.
