pictos_nano_animations  pictos_nano_videos  pictos_nano_cartoons  pictos_nano_quiz
 animations  videos  cartoons  quiz

Natural and anthropogenic

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.