As the application of carbon nanotubes (CNT) in consumer products continues to rise, studies have expanded to determine the associated risks of exposure on human and environmental health. In particular, several lines of evidence indicate that exposure to multi-walled carbon nanotubes (MWCNT) could pose a carcinogenic risk similar to asbestos fibers. However, to date the potential markers of MWCNT exposure are not yet explored in humans.
Showing posts with label Nanoparticle. Show all posts
Showing posts with label Nanoparticle. Show all posts
Thursday, May 26, 2016
Saturday, July 11, 2015
Perspectives in Biological Monitoring of Inhaled Nanosized Particles
In this review, the authors synthesize published data of experimental studies on the distribution of inhaled nanoparticles and the first case reports to discuss the potential usefulness of their biological monitoring for clinical purposes.
Toxicokinetic studies suggest that nanoparticles may be absorbed predominantly by respiratory and oral routes with possible systemic translocation, leading to accumulation in the peripheral organs or excretion in feces or urine.
Some methods used in these studies may be applied successfully in retrospective evaluation of exposure or in follow-up of occupational exposure in the workplace. Biological monitoring of nanoparticles should be based on imaging methods that are essential to confirm their presence and to characterize them in tissue associated with analytical quantitative methods.
The first case reports reviewed emphasize the urgent need for the development of standardized procedures for the preparation and analysis of biological samples with a view to characterizing and quantifying nanoparticles.
Tuesday, July 22, 2014
Ask Well: Nanoparticles in Sunscreens
Today's post is shared from nytimes.com. Workers' in an outdoor environment are exposed the the sun's rays. The question arises as to whether present protective measures, ie. sunscreens are more harmful than helpful.
Titanium dioxide nanoparticles have been used increasingly in sunscreens in the last decade to protect the skin because the tiny particles directly absorb the radiation from sunlight, especially in the UVB range. But because the articles are so tiny — generally about 100 nanometers across, compared with about 3,000 to 9,000 nanometers for a speck of dust — some scientists have raised concerns about whether they might do harm by seeping through the skin and into the bloodstream.
Concerns grew when studies in mice showed that when injected under the skin, titanium dioxide caused inflammation . In addition, the International Agency on Cancer Research, part of the World Health Organization, decided in 2006 to classify titanium dioxide as a potential human carcinogen, based mostly on inhalation studies in animals, though the group called the evidence “conflicting at best.”
But research has largely dismissed such concerns about absorption, and most experts say that sunscreens containing nanoparticles can be safely used.
More recently, concerns have focused on the possibility that these nanoparticles could promote skin aging....
[Click here to see the rest of this post]
Titanium dioxide nanoparticles have been used increasingly in sunscreens in the last decade to protect the skin because the tiny particles directly absorb the radiation from sunlight, especially in the UVB range. But because the articles are so tiny — generally about 100 nanometers across, compared with about 3,000 to 9,000 nanometers for a speck of dust — some scientists have raised concerns about whether they might do harm by seeping through the skin and into the bloodstream.
Concerns grew when studies in mice showed that when injected under the skin, titanium dioxide caused inflammation . In addition, the International Agency on Cancer Research, part of the World Health Organization, decided in 2006 to classify titanium dioxide as a potential human carcinogen, based mostly on inhalation studies in animals, though the group called the evidence “conflicting at best.”
But research has largely dismissed such concerns about absorption, and most experts say that sunscreens containing nanoparticles can be safely used.
More recently, concerns have focused on the possibility that these nanoparticles could promote skin aging....
[Click here to see the rest of this post]
Thursday, October 28, 2010
Workers Compensation and Nanotechnology - The New Frontier
NIOSH research has revealed that breathing nanoparticles may result in damaging health effects.
"Nanotechnology has the potential to revolutionize countless products, create computers smaller and faster than once could be imagined, and fight diseases such as cancer. According to the Project on Emerging Nanotechnology, by the summer of 2009 there were 1,015 consumer products using nanotechnology. That represents nearly a 19-fold increase over the 54 products listed in 2005. Nanotechnology involves the manipulation of matter at a near-atomic scale. Nanoparticles measure from 1 to 100 nanometers in size, with 1 billion nanometers forming a meter. For comparison, a billion inches would nearly circle the Earth 2 times."
"Nanotechnology has the potential to revolutionize countless products, create computers smaller and faster than once could be imagined, and fight diseases such as cancer. According to the Project on Emerging Nanotechnology, by the summer of 2009 there were 1,015 consumer products using nanotechnology. That represents nearly a 19-fold increase over the 54 products listed in 2005. Nanotechnology involves the manipulation of matter at a near-atomic scale. Nanoparticles measure from 1 to 100 nanometers in size, with 1 billion nanometers forming a meter. For comparison, a billion inches would nearly circle the Earth 2 times."
- A 2004 survey estimatedthat nearly 25,000 U.S. workers were employed at businesses that exclusively produced nanotechnology products.
- Nanoparticles can enter the body through many routes including inhalation, swallowing, ingestion, and absorption through the skin.
- Nanotechnology may present health risks but it can also be used to protect workers. New respirator designs, for instance, use nanotechnology to create more effective filters to block harmful substances.
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For over 3 decades the Law Offices of Jon L. Gelman 1.973.696.7900 jon@
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