Workers with existing allergic conditions could have worse reactions when exposed to nanoparticles (http://www.nanocomputer.com/?p=1452). Worse, nanomedecine portends the release of dangerous nanoparticles, nanorobots or nanoelectronic devices that will wreak havoc in the body (http://www.nanocomputer.com/?p=990). For instance, scientists from Brown University say that nanoparticules of nickel may trigger cancer (http://www.nanocomputer.com/?p=446).
When human lung epithelial cells are exposed to equivalent doses of nano-sized (left) or micro-sized (right) metallic nickel particles, activated HIF-1 alpha pathways (stained green) appear mostly with the nanoparticles.
In a project funded by the Danish Environemntal Protection Agency (EPA), the Technical University of Denmark (DTU) and National Research Centre for the Working Environment have initiated the development of a screening tool called NanoRiskCat (NRC) for the evaluation of exposure and hazard of nanomaterials contained in products for professional and private use. Authored by Steffen Foss Hansen and Anders Braun from DTU's Department of Environmental Engineering and Keld Alstrup-Jensen from the National Research Centre for the Working Environment Environmental Project, the 268-page report on the NanRiskCat screening tool can be downloaded as a PDF file from the Danish EPA's website.The project's aim was to identify, categorize and rank the possible exposure and hazards associated with a nanomaterial in a product.