Cobalt Doped Tungsten Carbide Nanoparticles and Mammalian Cells

To achieve harder metals that don't wear down quickly, manufacturers are considering the use of tungsten-carbide nanoparticles and cobalt, which is thought to increase the strength and durability of the finished product.
Unfortunately, as Susanne Bastian et al's article "Toxicity of Tungsten Carbide and Cobalt-Doped Carbide Nanoparticles in Mammalian Cells in Vitro" (Supplemental Material available here), demonstrates, increased exposure to these nanoparticles will, in all likelihood, lead to increased incidences of asthma, other respritory illnesses, and lung cancer among workers.

http://www.nanolawreport.com/2009/05/articles/cobalt-doped-tungsten-carbide-nanoparticles-and-mammalian-cells/

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