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O2 can be activated to form a variety of reactive oxygen species including superoxide (O2− , hydrogen peroxide(H2O2 ), hydroxyl radicals (OH ¡¤ ) and singlet oxygen (1O2 ),each of which may play an important role in chemical reactions and biological systems. In order to identify the type of species generated in our system, we employ the scavenger mechanism to examine the system. It has been well established that carotene, mannite, catalase, and SOD are specific scavengers that can e ff ectively inhibit the generation of 1O 2 , OH ¡¤ , H 2 O 2 ,and O 2−species, respectively. >>Long R, Mao K, Ye X, et al. Surface Facet of Palladium Nanocrystals: A Key Parameter to the Activation of Molecular Oxygen for Organic Catalysis and Cancer Treatment[J]. Journal of the American Chemical Society, 2013, 135(8): 3200-3207. Ï£ÍûÓаïÖú |

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, hydrogen peroxide(H2O2 ), hydroxyl radicals (OH ¡¤ ) and singlet oxygen (1O2 ),each of which may play an important role in chemical reactions and biological systems. In order to identify the type of species generated in our system, we employ the scavenger mechanism to examine the system. It has been well established that carotene, mannite, catalase, and SOD are specific scavengers that can e ff ectively inhibit the generation of 1O 2 , OH ¡¤ , H 2 O 2 ,and O 2−species, respectively.