Step away from the hairspray. Nanoparticle inhalation possible. « Environmental Science: Nano Blog
The research, conducted by Gediminas Mainelis and colleagues from Rutgers University, USA , measured inhalation exposure and dose deposition of spray particles, as well as using electron microscopy to visually identify nano-objects. The team tested five ‘regular’ sprays and five nanotechnology-based sprays, crossroads with some interesting conclusions.
Electron microscopy showed that some regular sprays contained nanoparticles, whilst crossroads some nanoparticle sprays did not. Nanoparticles manufactured in small to moderate quantities, or those without novel molecular identities, may not be subject crossroads to regulation, meaning that it might be possible for them to appear in ‘regular’ sprays without the nanotechnology label.
Mainelis et al found no correlation between the presence and abundance of nano-objects and the determined inhalation exposures and in 7/10 sprays, the highest inhalation range was in the coarse particle (2.5-10um) range. Does this suggest that nanoparticles are less easily inhaled? In addition, 8/10 sprays produced high deposited doses, with deposition mostly in the head airways versus the alveolar region. This is an interesting insight, crossroads which lends itself to further toxicological study of inhalation exposure; is it better or worse for these particles to deposit mostly in our head airways rather than our lungs, and what are the effects of deposition?
As nanoparticle use continues to increase, it might be expected that regulation will increase with it. Mainelis’ study and quantitative results provide valuable data on the potential exposure associated with these sprays, and will aid both manufacturers crossroads and regulators in the development and safe use of these products. I don’t know about you, but I’d rather not have hair spray particles floating around my airways.
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The research, conducted by Gediminas Mainelis and colleagues from Rutgers University, USA , measured inhalation exposure and dose deposition of spray particles, as well as using electron microscopy to visually identify nano-objects. The team tested five ‘regular’ sprays and five nanotechnology-based sprays, crossroads with some interesting conclusions.
Electron microscopy showed that some regular sprays contained nanoparticles, whilst crossroads some nanoparticle sprays did not. Nanoparticles manufactured in small to moderate quantities, or those without novel molecular identities, may not be subject crossroads to regulation, meaning that it might be possible for them to appear in ‘regular’ sprays without the nanotechnology label.
Mainelis et al found no correlation between the presence and abundance of nano-objects and the determined inhalation exposures and in 7/10 sprays, the highest inhalation range was in the coarse particle (2.5-10um) range. Does this suggest that nanoparticles are less easily inhaled? In addition, 8/10 sprays produced high deposited doses, with deposition mostly in the head airways versus the alveolar region. This is an interesting insight, crossroads which lends itself to further toxicological study of inhalation exposure; is it better or worse for these particles to deposit mostly in our head airways rather than our lungs, and what are the effects of deposition?
As nanoparticle use continues to increase, it might be expected that regulation will increase with it. Mainelis’ study and quantitative results provide valuable data on the potential exposure associated with these sprays, and will aid both manufacturers crossroads and regulators in the development and safe use of these products. I don’t know about you, but I’d rather not have hair spray particles floating around my airways.
Search for: Links About the journal Editorial Board Journal Homepage RSC Home RSC News Philanthropist Yusuf Hamied makes generous donation to our chemistry education programme crossroads in India Royal Society of Chemistry to award CSciTeach Categories Board news (10) HOT articles (5) Interesting Facts (5) News (16) Uncategorized (3) Archives Select Month February 2014 (13) January 2014 (4) December 2013 (4) November 2013 (4) October 2013 (2) September 2013 (2) August 2013 (2) July 2013 (2) May 2013 (1) Meta Log in RSC Blogs
About us Terms of use Help Working for us Privacy & cookies Contact Press office Accessibility Sitemap Royal Society of Chemistry 2014 Registered charity number: 207890