Local view for "http://purl.org/linkedpolitics/eu/plenary/2009-04-24-Speech-5-237"
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"en.20090424.38.5-237"2
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"Materials made of particles which measure less than 10
m are called nanomaterials. They occur in free form or as nanoparticle emissions in a matrix of other materials, such as composites.
unintended by-products in the form of nanoparticles, for example as a result of combustion, friction of tyres, and other uncontrolled processes which create nanoaerosols by Brownian motion.
Will the use of nanoparticles in sun lotions, whose purpose is to block ultraviolet radiation, cause side effects on health? This can and should be investigated.
Does the catalytic action of the nanoaerosols which are all around us have dangerous effects on health? This, too, requires urgent scientific research, which, however, is difficult to conduct, for physical and chemical reasons.
These are nanomaterials obtained with ‘top-down’ technology and the use of high-energy attrition.
Nanoparticles have a high surface area and significant surface energy, which give them the following characteristics:
ability to catalyse chemical reactions;
significant reactivity (potential);
can easily penetrate living cells.
Uncontrolled release of free nanoparticles into the environment may be hazardous to health. Free nanoparticles of various materials may cause carcinogenic chemical reactions if they enter living cells, but this has not been confirmed.
Sources of nanoparticles released into the environment include:
products manufactured by the ‘top-down’ method, for example nano zinc oxide particles used in UV filter creams, and bacteriocidal additives such as silver nanoparticles;"@en1
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