"Results indicated none to minimal toxicological effects occurred with exposure of macrophages as high as 500 ug/ml for 24 hours with aluminum oxide nanoparticles. HOWEVER, there was significant delayed toxicity that occurred at 96 and 144 h post exposure. Exposure to aluminum metal nanoparticles indicated slight to moderate toxicity after 24 houts exposure at 100 and 250 ug/ml. The phagocytic ability of these cells was significantly hindered by exposure to all tested aluminum nanoparticles at 25 ug/ml for 24 hours, but not by the aluminum oxide nanoparticles."
This document has been released into the public domain.