Nanotechnology Now







Heifer International

Wikipedia Affiliate Button


DHgate

Home > News > Nanotechnology: A New Force For Human Betterment - Part II

April 5th, 2010

Nanotechnology: A New Force For Human Betterment - Part II

Abstract:
The Editor interviews John R. Bashaw , Partner in the New Haven office, William S. Rogers, Jr., Partner in the Boston office and Joseph Clark , Counsel in the Florham Park, New Jersey office of Day Pitney LLP.

Editor: Please discuss the recently published EPA Significant New Use Rule (SNUR) under the Toxic Substances Control Act for multi-walled carbon nanotubes.

Rogers: Before the EPA announcement in January, 2010 concerning the proposed SNUR, a series of studies was done beginning in the United Kingdom with a study led by Poland, et al. (2008). That study involved the injection of multi-walled nanotubes into the abdomen of mice, the mucosal lining of which is identical to the mesothelium of the pleura or chest. The injection directly into the abdomen was intended to simulate exposure of the mesothelium in the chest due to inhalation exposure. Approximately 90 days later they examined the biological changes who had taken place as a result of exposure of the abdominal mesolthelial lining to the carbon nanotubes. They reportedly found evidence of inflammation that was consistent with the type of inflammation that had traditionally been recognized in people who had inhalation exposure to asbestos fibers and who later developed mesothelioma. They did not find actual mesothelioma in the mice, but rather what were thought to be precursors to such cancers. The result of publication of these findings was an alarmist reaction that carbon nanotubes posed a danger to humans analogous to that of asbestos fibers. This became headline news.

The problem with the study was that the mice were exposed to massive doses of nanotubes by injection, which is not a natural or likely cause of human exposure. The test methodologies were a poor analog for what likely human exposure would be in any setting. Many commentators criticized the study's findings and suggested that its conclusions about a potential relationship between carbon nanotubes and asbestos fibers was flawed because it rested largely on their shape similarity (long and thin); however, for the last two years there has been talk in the popular media about whether the risks associated with all nanomaterials are akin to those associated with asbestos fibers. The only similarities between carbon nanotubes and asbestos fibers is their long aspect ratio, unlike other nanomaterials. There has been more focus on carbon nanotube toxicity than on other nanomaterial substances, which has percolated up to the EPA. EPA has now decided to treat carbon nanotubes separately from other nano-objects.

Source:
metrocorpcounsel.com

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Keysight Technologies Shifts to Direct Sales of High-Performance Products in North America March 3rd, 2015

Cambrios and Heraeus Jointly Create New, High-Conductivity Transparent Conductors: Two Companies' Combined Products Dramatically Extend Flexible Substrate Capabilities for Next-Generation Mass-Market Technology Products March 3rd, 2015

The taming of magnetic vortices: Unified theory for skyrmion-materials March 3rd, 2015

Democratizing synthetic biology: New method makes research cheaper, faster, and more accessible March 3rd, 2015

Govt.-Legislation/Regulation/Funding/Policy

The taming of magnetic vortices: Unified theory for skyrmion-materials March 3rd, 2015

Black phosphorus is new 'wonder material' for improving optical communication March 3rd, 2015

New nanodevice defeats drug resistance: Tiny particles embedded in gel can turn off drug-resistance genes, then release cancer drugs March 2nd, 2015

Forbidden quantum leaps possible with high-res spectroscopy March 2nd, 2015

Nanotubes/Buckyballs

Researchers turn unzipped nanotubes into possible alternative for platinum: Aerogel catalyst shows promise for fuel cells March 2nd, 2015

Chromium-Centered Cycloparaphenylene Rings as New Tools for Making Functionalized Nanocarbons February 24th, 2015

Building tailor-made DNA nanotubes step by step: New, block-by-block assembly method could pave way for applications in opto-electronics, drug delivery February 23rd, 2015

Half spheres for molecular circuits: Corannulene shows promising electronic properties February 17th, 2015

Announcements

The taming of magnetic vortices: Unified theory for skyrmion-materials March 3rd, 2015

Democratizing synthetic biology: New method makes research cheaper, faster, and more accessible March 3rd, 2015

Pens filled with high-tech inks for do-it-yourself sensors March 3rd, 2015

Black phosphorus is new 'wonder material' for improving optical communication March 3rd, 2015

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers

The taming of magnetic vortices: Unified theory for skyrmion-materials March 3rd, 2015

Democratizing synthetic biology: New method makes research cheaper, faster, and more accessible March 3rd, 2015

Pens filled with high-tech inks for do-it-yourself sensors March 3rd, 2015

Black phosphorus is new 'wonder material' for improving optical communication March 3rd, 2015

Safety-Nanoparticles/Risk management

Colon + septic tank = unique, at times stinky, study: Researchers use lab-scale human colon and septic tank to study impact of copper nanoparticles on the environment March 2nd, 2015

Potential toxicity of cellulose nanocrystals examined in Industrial Biotechnology journal February 19th, 2015

A breakthrough in nanotoxicology by INRS researchers: Silver nanoparticles and inflammation February 18th, 2015

“Nanorama Laboratory“: Free Tool on Safe Handling of Nanomaterials Now Available in English! February 4th, 2015

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 1999-2015 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE