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( Zhe Jin ),( Yan Qing Gong ),( Xin Cheng Qin ),( Jian Zhang ),( Yi Chen Zhu ),( Gui Ting Lin ),( Tom F Lue ),( Zhong Cheng Xin ) 한국조직공학·재생의학회 2008 조직공학과 재생의학 Vol.5 No.4
To explore the ability of MaxPol-T/S, a novelbiodegradable poly-lactic-co-glycolic acid(PLGA) scaffold, in providing a cell-matrix interaction interface for cell growth, we generated GFP positive adipose derived stem cell(ADSCGFP+) and fibroblasts(FCGFP+) for investigating the cellular growth on this biomaterial. The MaxPol-T/S was produced through salt-leaching/particulate-leaching technology for tissue engineering, which provides a modified surface for the best cellular attachment sites and nutrient supply and waste exchange conditions. The morphological features of MaxPol-T/S were studied with a scanning electron microscope and the ADSCGFP+ and FCGFP+ were confirmed by auto-fluorescence microscopy and flow cytometry assay. Being seeded onto the MaxPol-T/S in vitro, the growth and morphology of ADSCGFP+ and FCGFP+ were further verified by auto-fluorescence microscopy and MMT test. The ADSCs and fibroblasts, expressed strong GFP signals in the cytoplasm and nucleus, adhered and proliferated on the surface of scaffold MaxPol-T/S. Both cell lines survived on the scaffold more than 21 days in vitro and formed three-dimensional colonies on the surface of the MaxPol-T. In conclusion, MaxPol-T/S is a novel PLGA scaffold for ADSCGFP+ and FCGFP+ and implies a promising technique for tissue engineering.
Fa-yang Jin,Song Wang,Wan-Fen Pu,Cheng-dong Yuan,Lei Wang,Ke-xing Li,Can Gong 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.39 No.-
Emulsified oil foam was investigated to improve the flowability of heavy oil under high salinityenvironment of 23 104 mg/L. Sixteen foaming agents were used to determine an applicableformulation. The factors affecting the formation and stability of the emulsified oil foam were evaluated,including oil viscosity, oil–water ratio, foaming agent concentration, stirring rate and time, andtemperature. The microgram of emulsified oil foam was analyzed by polarizing microscope. The resultsshowed that stable pseudo-emulsion film was built. The considerable dynamic viscosity-reducing ratesin different depth in wellbore were obtained according to pressure differential method in long tubephysical simulation experiments.
Effect of Graphene/TiO2 (001) Interface on Threshold Voltage and Nonlinearity
Yuehua Dai,Shanshan Gong,Zhisheng Zhong,Fengyu Gao,Feifei Wang,Cheng Ding,Jin Yang,Fei Yang 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2018 NANO Vol.13 No.6
In this work, the threshold voltage (Vth) and nonlinearity (NL) of Graphene (Gra)/TiO2/Gra heterojunction were studied. First, the density functional tight binding (DFTB+) and much more dynamics were used to investigate the IV curves and the resistive switching properties of TiO2 slab and Gra/TiO2/Gra heterojunction. The NL of Gra/TiO2/Gra heterojunction is stronger than that of the TiO2 slab. The Vth of the resistive transition of the heterojunction is larger than that of the TiO2 slab. The tunneling probabilities and the Mulliken atomic population at the Gra/TiO2 interface under different electric fields were calculated by the Cambridge sequential total energy package (CASTEP). Results showed that both the parameters evidently increased under a certain numerical electric field. Finally, the movement of atom in the electric field and the change in the chemical bond were simulated by DFTB+ module. The effect of the Gra/TiO2 interface on Vth and NL was further illustrated. Postponed Vth and improved NL were found at the heterojunction relative to the TiO2 slab due to the presence of the interface barrier. This work provides guidance and reference for design and optimization of TiO2-based selectors.
Zhen-xing Xing,Zhuang Huang,Gong-jin Cheng,He Yang,Xiangxin Xue,Guo-dong Zhang 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.12
Sea sand vanadia-titania magnetite is difficult to pelletize, and it is difficult for iron and steel enterprises touse it as a raw material for ironmaking. In this paper, the high-temperature physicochemical characteristics and sinteringbehavior of sea sand vanadia-titania magnetite were comprehensively studied and systematically evaluated. Thehigh-temperature metallurgical physicochemical characteristics of different iron ore powders and under different experimentalconditions were studied by the micro-sintering experimental system. The high-temperature sintering indexeswere comprehensively evaluated by the grey correlation analysis, and the influence of sea sand ore on sintering performancewas investigated by sintering pot experiment. The research results show that the high-temperature sinteringcharacteristics of sea sand vanadia-titania magnetite were the worst, and the grey correlation degree was the lowest. The high-temperature sintering characteristics of sintered blocks with sea sand ore were affected by changing the basicityand the addition amount of sea sand ore. When the basicity was 0.8 and the addition amount of sea sand ore was15 wt%, the evaluation index of grey relational analysis was the best. The vertical sintering speed and tumble indexwere slightly reduced by adding sea sand ore, but the sinter yield was improved and the particle size distribution of sinterwas optimized. The experimental results provide a certain data reference for the actual production of sinter with seasand vanadia-titania magnetite.