DNA Damage Upon UV Illumination in the Presence of Inorganic UV-Shielding Materials
White nanoparticles of calcia-doped ceria were prepared from the precipitate by reacting CeCl3-CaCl2 mixed solution with NaOH solution at pH 12 and the oxidation with hydrogen peroxide solution at 40oC, followed by the calcination at 700oC for 1 h. Ceria particles generated far less singlet oxygen and caused far less damage to the DNA plasmids upon UV illumination than either the titania or the zinc oxide reference pigments.
Katsutoshi Komeya, Yohtaro Matsuo and Takashi Goto
T. Sato et al., "DNA Damage Upon UV Illumination in the Presence of Inorganic UV-Shielding Materials", Key Engineering Materials, Vol. 352, pp. 293-296, 2007