摘要：Nowadays, nanoparticles are in the centre of interest but their toxicity has not been explored much yet. Because of their small dimensions, nanoparticles can get through cell walls or on the other side eliminate from organism uneasily. Even if nanoparticles do not show any acute toxicity, there are still unanswered questions about their long term effects, bioaccumulation and influences on substance structure. The mechanism of nanotoxicity has been unexplored but there is a relation with chemical composition, structure, size and surface of nanoparticles. Toxicity of nanoparticles can be educed in two ways: – from chemical toxicity on the basis of chemical composition, e.g. releasing of toxic ions, – stress or stimuli caused by the surface, size or shape of the particles
