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Nano hazards: exposure to minute particles harms lungs, circulatory system.

Authors
Raloff-J
Source
Sci News 2005 Mar; 167(12):179
NIOSHTIC No.
20030923
Abstract
Nanomaterials, the current darlings of industry, are showing up in products ranging from cosmetics to electronics. However, new animal studies indicate that inhaling these microscopic spheres and tubes could cause big trouble, especially for workers who manufacture and handle them. That message came through loudly in New Orleans last week at the Society of Toxicology meeting, where several dozen reports unveiled details about how nanopollutants interact with the body. Most of the studies focused on the effects of lung exposures because the particles' size-just a few billionths of a meter in diameter-permits them to reach the most vulnerable lung tissue. John T. James of NASA's Johnson Space Center in Houston, and his colleagues squirted nanoparticles into the respiratory tracts of mice and then examined the rodents after 1 week and after 3 months. Although sootlike carbon nanospheres caused no harm, an equal mass of commercially available carbon nanotubes wreaked significant lung damage, even killing a few animals.
Keywords
Particulates; Exposure-levels; Exposure-assessment; Lung-disorders; Circulatory-system; Workers; Worker-health; Occupational-exposure; Occupational-health; Occupational-hazards; Animal-studies; Microorganisms; Nanotechnology
CODEN
SCNEBK
Publication Date
20050319
Document Type
Journal Article
Fiscal Year
2005
NTIS Accession No.
NTIS Price
Issue of Publication
12
ISSN
0036-8423
NIOSH Division
HELD
Source Name
Science News
State
WV
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