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Dolores J. Fatur † Richard H. C. San † Allan J. Davison † Hans F. Stich † 《Photochemistry and photobiology》1987,45(3):413-420
Abstract— Maximum chemiluminescence in a system containing 6-hydroxydopamine (6-OHDA) and H2 O2 required the addition of Fe2+ :EDTA, oxygen, and lucigenin. In this system luminescence was strongly inhibited by catalase (91% inhibition) or 50 m M mannitol (83%), whereas superoxide dismutase or ascorbate did not significantly change the reaction rate. In the absence of lucigenin, 50 m M mannitol (78%), catalase (76%), or ascorbate (73%) inhibited strongly, while superoxide dismutase inhibited by 60%. Removing EDTA from the lucigenin-containing system caused a 79% decrease in luminescence, while the substitution of desferoxamine for EDTA decreased luminescence by 55%. In the presence of desferoxamine plus EDTA the luminescence increased by 30% in comparison with that seen with EDTA alone. Luminescence in the system containing 6-hydroxydopamine, H2 O2 , Fe2+ :EDTA and lucigenin required the presence of oxygen (93% inhibition anaerobically), consistent with a mechanism involving reductive oxygenation of the lucigenin. It is concluded that luminescence in the presence of lucigenin involves a substantial contribution from H2 O2 and Fe2+ mediated by a mannitol-sensitive intermediate (conceivably Fenton-derived hydroxyl radicals). In the absence of lucigenin, superoxide and an ascorbate-labile component are additional important participants in the process. 相似文献
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Pagáčová Jana Plško Alfonz Papučová Iveta Faturíková Katarína Prnová Anna Valuchová Jana Ondrušová Darina 《Journal of Thermal Analysis and Calorimetry》2020,142(5):1643-1648
Journal of Thermal Analysis and Calorimetry - For utilization of TiO2 in advanced applications, TiO2 after thermal treatment has to be in crystalline phase of anatase, because it gives the desired... 相似文献
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