Nanotechnology Now

Our NanoNews Digest Sponsors



Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Nanotechnology Columns > Bergeson & Campbell, P.C. > Particle and Fibre Toxicology Publishes Article Concerning Workplace Exposure to CNTs

Lynn L. Bergeson
Managing Director
Bergeson & Campbell, P.C.

Abstract:
On October 21, 2013, Particle and Fibre Toxicology posted an article entitled "Carbon nanotube dosimetry: from workplace exposure assessment to inhalation toxicology."

October 24th, 2013

Particle and Fibre Toxicology Publishes Article Concerning Workplace Exposure to CNTs

On October 21, 2013, Particle and Fibre Toxicology posted an article entitled "Carbon nanotube dosimetry: from workplace exposure assessment to inhalation toxicology." See http://www.particleandfibretoxicology.com/content/10/1/53/abstract# The authors, who are affiliated with the National Institute for Occupational Safety and Health (NIOSH), note that there are currently no known end-point effects in humans following carbon nanotube (CNT) exposure, leading to extrapolation from rodent studies. The purpose of the study was to determine how realistic U.S. workplace exposures to CNTs relate to animal studies. The study states that its goal "was to expose animals to a high dose that would cause significant inflammation with histological findings and then a low dose to serve as a no observable effect level. This design will serve as a reference for detailed molecular analysis, pulmonary pathology, systemic inflammation, and evaluation of cardiovascular dysfunction at human relevant exposures." The abstract states that the findings "showed a limited pulmonary inflammatory potential of MWCNT at levels corresponding to the average inhalable elemental carbon concentrations observed in U.S.-based CNT facilities and estimates suggest considerable years of exposure are necessary for significant pathology to occur at that level." The conclusion itself states: "It is clear from toxicological evaluations that MWCNT have a relatively high hazard when compared to other materials. These hazards may include fibrosis, promotion of lung tumors, cardiovascular dysfunction, and pulmonary and systemic inflammation. The present findings show that limiting cumulative exposures is imperative to reducing adverse effects."

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More












ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







© Copyright 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE