tag:blogger.com,1999:blog-36954124.post5298806946025934129..comments2024-03-21T04:36:03.730-07:00Comments on Nanoscience and Nanosociety: The Particle PoliceChris Newfieldhttp://www.blogger.com/profile/01078395415386100872noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-36954124.post-6809044201617463622007-01-15T12:02:00.000-08:002007-01-15T12:02:00.000-08:00Well, the bound/unbound distinction makes *some* s...Well, the bound/unbound distinction makes *some* sense to me in that if the nanoparticle is part of some stable matrix it's unlikely to get inhaled or absorbed into the bloodstream. After all, no one seems concerned by the nanostructures in their computer, since those are bound to a silicon matrix (the environmental/health issues I've heard about disposal of electronics has to do with chemical properties of heavy metals, rather than their specifically nano properties). On the other hand, a "stable" matrix like a tire can wear down (or get destroyed in a fire or be sawed open by a handyman or whatever). On the third hand, though, we've been releasing nanoparticles that way (e.g. carbon black) for well over a century, so surely the new regulations need some justification that takes that longer history into account.Cyrushttps://www.blogger.com/profile/01421530406016041228noreply@blogger.comtag:blogger.com,1999:blog-36954124.post-83870870717298018492007-01-15T09:49:00.000-08:002007-01-15T09:49:00.000-08:00I recently talked with a materials scientist who w...I recently talked with a materials scientist who works for Michelin. We discussed whether or not Michelin is doing nano...he referred to the longstanding usage of nano-size 'carbon black' as a tire reinforcement and noted that it remains an industry mystery where the particles go as they wear away from tires and are deposited all along the world's highways. Does Berkeley imagine itself regulating auto tires? By their logic, this seems plausible.Patrick McCrayhttps://www.blogger.com/profile/17003397593257230824noreply@blogger.com