Complex sentence: For example, CdSe nanocrystals are highly toxic to cultured cells under UV illumination, because the particles dissolve, in a process known as photolysis, to release toxic cadmium ions into the culture medium.
Split into simpler sentences: For example, CdSe nanocrystals are highly toxic to cultured cells under UV illumination. As a result, semiconductor particles can be dissolved, in a process known as photolysis, to release toxic cadmium ions into the culture medium.