 |
 |
 |
 |
| animations | videos | cartoons | quiz |
What kind of nano-objects are we talking about?
It is necessary to distinguish natural and "anthropogenic" (related to human activities) nano-objects. Either they are unintentional (combustion, abrasion, processes emitting dust,…) or manufactured. Recent toxicology studies show that some synthesized nano-objects will likely reveal toxic for some forms or chemical compositions. So we must take appropriate precaution measures.
Propensity to disseminate according to the state of the particles.
The nano-objects are highly unstable in the air or water: they tend to agglomerate or to aggregate. The ISO normalization is taken into account this property and propose the term NOAA “Nano-objects, and their aggregates and agglomerates” to cover all these types of objects.