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Hard metal or cemented carbide consists of a mixture of tungsten carbide (WC) (85%) and metallic cobalt (Co) (5–15%). WC–Co is considered to be potentially carcinogenic to humans. However, no comparison of the adverse effects of nano-sized WC–Co particles is available to date. In the present study, we compared the ability of nano- and fine-sized WC–Co particles to form free radicals and propensity...
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