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Linxiang Tan,Xiaoxia Ke,Xuechun Song,Qiaoqiao Yin,Ru Qiao,Kaiyan Guo,Lanlan Zhu 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.60 No.-
A novel NIR-responsive photocatalyst NaYF4:Yb,Er@SiO2@Zn1 − xMnxO with double-layered core–shell structure was prepared by a three-step reaction. NaYF4:Yb,Er serves as a NIR-to-visible upconverter and provides “visible light” or “necessary energy” to Zn1 − xMnxO. Meanwhile, Mn2+-doping in Zn1 − xMnxO can extend the photoresponse of ZnO to visible-light region and enhance its charge separation. The nanocomposite exhibits good activity for dye decomposition and antibacterial property under NIR irradiation. The “energy absorption – energy conversion – energy transfer – surface reaction” process dominates the overall photocatalytic activity. Based on the standard MTT (abbr. for 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide) assay, NaYF4:Yb,Er@SiO2@Zn1 − xMnxO also exhibits good biocompatibility and low cytotoxicity with human umbilical vein endothelial cells (HUVEC) as model cells.
Ying Zhang,Yunrun Zhang,Jianyong Dong,Xiaoxia He,Min Qiao,Hans-Otto Baral,Ke-Qin Zhang,Zefen Yu 한국미생물학회 2016 The journal of microbiology Vol.54 No.1
A new species of Orbilia related to O. luteorubella is described mainly based on morphological characters of its asexual morph and molecular data. The sexual morph does not significantly differ from O. luteorubella, whereas the asexual morph obtained from its ascospore isolate resembles members of the non-predacious genus Dactylella, because it has fusiform phragmoconidia borne singly at the apex of conidiophores. Phylogenetic analysis showed that this strain clustered with a clade that included available strains of the O. luteorubella aggregate and was distant from all analysed Dactylella species. Within this clade, the new strain fell between species with filiform conidia and those of a Pseudotripoconidium anamorph. By combining morphological and phylogenetic analyses, we conclude that our isolate belongs to a new taxon. Pleomorphism of the new taxon is described and discussed.
Linxiang Tan,Wenjie Wu,Qiaoqiao Yin,Xiaoxia Ke,Ru Qiao,Guoxiu Tong,Lanlan Zhu 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.52 No.-
The dimer-type heterostructured Ag/Zn0.995Ni0.005O microspheres were prepared via two-stepmicrowave-assisted process, which exhibited stronger visible-light-activated antibacterial performancethan visible-light only, ZnO/Vis, Zn0.995Ni0.005O/Vis, or AgNPs/Vis. It is attributed to not only theinteraction of released metal ions with functional groups of vital enzymes and proteins, but also thecollapsing force of reactive oxygen species to the cells. Photoelectrochemical measurements show thatthe photogenerated charges of Ag/Zn0.995Ni0.005O possess longer lifetime and higher separation resultingfrom the synergistic effect between Ni and Ag, which leads to its superior visible-light-drivenantibacterial performance. Gram-negative bacteria are more effectively restrained by Ag/Zn0.995Ni0.005Othan Gram-positive bacteria because of structural difference between their cell walls.