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TiO2ecarbon nanotube composites for visible photocatalysts - Influence of TiO2 crystal structure
Mu Yao Guo,Fangzhou Liu,Yu Hang Leung,Alan Man Ching Ng,Aleksandra B. Djurišić,Wai Kin Chan 한국물리학회 2013 Current Applied Physics Vol.13 No.7
We investigated the influence of the crystal structure of TiO2 and the use of different TiO2 precursors on the properties and photocatalytic activity of carbon nanotube (CNTs)etitania composites. We found that the crystal structure and properties of starting TiO2 nanomaterial significantly affected the effect of CNTs incorporation on the photocatalytic activity under simulated solar and visible light illumination (simulated solar illumination with UV-blocking filter). In case of significant photocatalytic activity under visible light illumination (anatase TiO2), likely due to the presence of native defects, composites exhibited lower activity under visible illumination only, but higher activity under simulated solar illumination. The opposite trends were observed for P25 (anatase þ rutile) and rutile TiO2, where incorporation of CNTs resulted in a significant increase of photocatalytic activity under visible illumination. Thus, control over crystal structure and native defects is essential for the development of efficient visible light activated photocatalysts.
Rapid Expression of Bm46 in Bombyx mori Cell Lines, Larvae and Pupae
Wang, Haiyan,Chen, Keping,Guo, Zhongjian,Yao, Qin,Wang, Qiang,Mu, Runhong Korean Society of Sericultural Science 2007 International Journal of Industrial Entomology Vol.15 No.1
In this study, ORF 46 of Bombyx mod nucleopolyhedrovirus(Bm46) fused with EGFP was expressed in Bombyx mod cell lines, larvae and pupae by BmNPV Bacmid system. Bm46 and EGFP were cloned into donor plasmid pFastBacHTb, which was transformed to competent DH10B cells containing helper and BmNPV bacmid by site-specific transposition. Recombinant bacmid was used to transfected BmN-4 cells to produce the recombinant baculovirus vBm-Bm46-EGFP. Recombination virus was injected into silkworm larvae and pupae. The expression of the fusion protein was monitored by examining green fluorescence using a fluorescent microscope. Intense fluorescence in cells and silkworm was observed at 4 days post-infection, indicating the Bm46-EGFP fusion gene was expressed successfully.