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| 1 | Enhancement of red emission by co-dopant Ln^(3+) ions in Eu^(3+) :LaOF nanoparticles显示文摘Fluoride nanoparticles of Ln3+(Ln3+=Pr3+,Nd3+,Sm3+,Gd3+,Tb3+Dy3+,Ho3+,Er3+,Tm3+,Yb3+)/Eu3+:LaOF and Eu3+ :LaOF with rhombohedral crystal structure were prepared by a hydrothermal-sintering method. The red fluorescence emission of Eu3+ ions was found to be enhanced with most of the co-dopant Ln3+ ions. Compared with strong fluorescence emission at 610 nm of Eu3+ :LaOF nanoparticles, the enhancement factors was up to ten times in Ln3+(Ln3+ =Gd3+,Dy3+,Tm3+)/Eu3+ :LaOF co-doped nanoparticles. The results show that the asymmetry of the local environment of Eu3+ ion was reduced by co-doping Ln3+ ion into the nanoparticles, and that energy transfer might occur between Eu3+ and codopant Ln3+ ions, which is suggested as the source of the observed fluorescence enhancement. | FU ZhenXing ZHENG HaiRong HE EnJie GAO Wei LI GuiAn | 2013 | Science China(Physics,Mechanics & Astronomy)2013，56，5： | 3 |
| 2 | Study on the imaging ability of the 2D neutron detector based on MWPC显示文摘A 2D neutron detector based on 3 He convertor and MWPC with an active area of 200 mm×200 mm has been successfully designed and fabricated.The detector has been tested with Am/Be neutron source and with collimated neutron beam with the wavelength of =1.37.The best spatial resolution of 1.18 mm(FWHM) and good linearity were obtained.This is in good agreement with theoretical calculations. | TIAN LiChao CHEN YuanBo TANG Bin ZHOU JianRong QI HuiRong LIU RongGuang ZHANG Jian YANG GuiAn XU Hong CHEN DongFeng SUN ZhiJia | 2013 | Science China(Physics,Mechanics & Astronomy)2013，56，10： | 3 |
| 3 | Preparation of Cu-SiO_2 composite aerogel by ambient drying and the influence of synthesizing conditions on the structure of the aerogel显示文摘A copper-doped silica composite aerogel with high specific surface area was prepared using a sol-gel method at ambient pressure. A drying control chemical additive (DCCA) N,N-dimethylformamide (DMF) was introduced to the composite sol of tetraethyl orthosilicate (TEOS) and copper nitrate (Cu(NO3)2·3H2O) during the synthesizing process. The influence of the preparation conditions including Cu loading, catalyst concentration and heat treatment on the structure of copper-doped silica was investigated. The results showed that the obtained aerogel particles were uniformly distributed. The pore diameter was in a range of 2 to 15 nm. Heavier Cu loading benefited the formation of CuO crystalline, and reduced the specific surface area and pore diameter. When the catalyst concentration was high, the aggregation of Si-O network was reduced with the increase of it. The composite aerogel exhibited a good thermal stability after the heat treatment at high temperature. | LI GuiAn, ZHU TingLiang, DENG ZhongXun, ZHANG YaJuan, JIAO Fei & ZHENG HaiRong College of Physics and Information Technology, Shaanxi Normal University, Xi’an 710062, China | 2011 | Chinese Science Bulletin2011，56，7： | 3 |
| 4 | Synthesis of Ag-SiO_2 composite nanospheres and their catalytic activity显示文摘A simple,mild,and time-saving method is employed to synthesize Ag-SiO2 composite nanospheres with Ag nanoparticles uniformly distributed on the surface of SiO2 nanoparticles.The chemical elements and the morphology of Ag-SiO2 composite nanospheres were analyzed with transmission electron microscopy(TEM),X-ray power diffraction(XRD),and X-ray photoelectron spectroscopy(XPS).On the surface of Ag-SiO2 composite nanospheres,silane coupling agent(KH-550)is introduced as an intermediary to connect the surfaces of SiO2 nanospheres and Ag nanoparticles,which is also helpful for avoiding the aggregation of Ag nanoparticles.It is found that Ag-SiO2 composite nanospheres have very good catalytic properties for the reduction of organic dyes,which may have potential application in wastewater treatment. | HAN QingYan LI GuiAn WANG DeXuan HE EnJie DONG Jun GAO Wei LI JunNa LIU TingZhuo ZHANG ZhongYue ZHENG HaiRong | 2014 | Science China Chemistry2014，57，6： | 2 |
| 5 | Simulation study on the boron-coated GEM neutron beam monitor显示文摘A Monte Carlo method of the 3D GEM simulation is introduced.The physical process of the neutron detection is described with the Geant4 code and the Garfield code.The results of the optimized electric-fields,the emitted ions spectrum,the electrons transverse diffusion and the signal width are presented.Moreover,the preliminary result with a CF-252 neutron source is reported.These are useful in designing detector structures and to provide an optimized option for the development of the boron-coated GEM neutron beam monitor. | WANG YanFeng SUN ZhiJia ZHOU JianRong YANG GuiAn XU Hong WANG Tuo CHEN YuanBo | 2013 | Science China(Physics,Mechanics & Astronomy)2013，56，10： | 2 |
| 6 | Rheological characterization of storage-stable SBS-modified asphalt显示文摘 | Guian Wen Yong Zbang Yinxi Zhang | 2002 | Polymer testing2002，，21： | 1 |
| 7 | Hyperbranehed oxadiazole-containing polyfluorenes: Toward stable blue light PLEDs显示文摘 | Xin Yu Wen Guian Zeng Wenjing | 2005 | Macromoleeules2005，38，16： | 1 |
| 8 | Tyrosine hydroxylase-positive cells and dopaminergic neuronal function in human embryonic stem cells: An electrophysiological validation显示文摘BACKGROUND: Induced differentiation strategies and cytochemical properties of human embryonic stem cells (hESCs) have been investigated. However, the electrophysiological functions of tyrosine hydroxylase (TH)-positive cells derived from hESCs remain unclear. OBJECTIVE: To investigate the differentiation efficiency of TH-positive cells from hESCs in vitro using modified four-step culture methods, including embryoid body formation, and to examine the functional characteristics of the differentiated TH-positive cells using electrophysiological techniques. DESIGN, TIME AND SETTING: Neuroelectrophysiology was performed at the Reproductive Medicine Center and Stem Cell Research Center, Peking University Third Hospital, and the Neuroscience Research Institute and Department of Neurobiology, Peking University, from September 2004 to August 2008. MATERIALS: The hESC line, PKU-1.1, a monoclonal cell line derived from a pre-implantation human blastocyst in the Reproductive Medical Center of Peking University Third Hospital. The patch clamp recording system was provided by the Neuroscience Research Institute and Department of Neurobiology, Peking University. METHODS: The hESC line was induced to differentiate into TH-positive cells in vitro using a modified four-step culture method, including the formation of embryoid body, as well as the presence of sonic hedgehog and fibroblast growth factor 8. The cell karyotype was assessed by G-banding karyotype analysis techniques and specific markers were detected immunocytochemically. Whole-cell configuration was obtained after obtaining a tight seal of over 1 GΩ. Ionic currents were detected by holding the cells at -70 mV and stepping to test voltages between -80 and 40 mV in 10-mV increments in voltage-clamp configuration. MAIN OUTCOME MEASURES: We measured the cell karyotype, specific cell markers, and the electrophysiological properties of the voltage-gated ion channels on the cell membrane of TH-positive dopaminergic cells differentiated from our hESCs line in vitro. RESULTS: The differentiated cells had a consistent appearance, and the majority of cells (> 90%) expressed TH and β-tubulion, as well as the neural progenitor marker, nestin. Cell karyotype analysis demonstrated that all of the hESCs had a stable and normal karyotype (46, XX) after dif-ferentiation. In addition, patch clamp recording showed that the 10 recorded TH-positive cells exhibited a fast inward current when the test voltage depolarized to -30 mV, and a delayed outward current when the test voltage depolarized to -10 mV. The peak of inward current was obtained at voltage between -10 mV and 0 mV, while the peak of outward current was obtained at 40 mV. The average peak of inward current density was (-50.05 ± 15.50) pA/pF, and the average peak of outward current density was (41.98 ± 13.55) pA/pF. CONCLUSION: More than 90% of the differentiated hESC-derived cells induced by the modified four-step culture method exhibit dopaminergic neuronal properties, including general electrophysiological functional properties, such as functional potassium and sodium channels. | Tianran Song | 2010 | Neural Regeneration Research2010，5，3： | 1 |
| 9 | Clinical, cytogenetic, and molecular analysis with 46,XX male sex reversal syndrome case reports显示文摘 | Xuefeng Gao Guian Chen Jing Huang | 2013 | J Assist Reprod Genet2013，30，3： | 1 |
| 10 | Rheological characterization of storage-stable SBS-modified asphalts显示文摘 | WEN GUIAN ZHANG YONG ZHANG YINXI | 2002 | Polymer Testing2002，21，3： | 1 |
| 11 | Imidazole derivatives: Thermally stable organic luminescence materials显示文摘 | Zhao Lei Li Shengbiao Wen Guian | 2006 | Materials Chemistry and Physics2006，100，3： | 1 |
| 12 | Vertebroplasty for vertebral com- pression fracture显示文摘 | Rapan S Jovanovi S Guian G | 2009 | Coil Antropol2009，33，3： | 1 |
| 13 | Prototype of a large neutron detector based on MWPC显示文摘A prototype of large-area position sensitive neutron detector was designed and constructed according to the requirements of the Small-Angle Scattering spectrometer of China Spallation Neutron Source(CSNS).The detector was based on the 3He neutron convertor and MWPC with an effective area of 650 mm×650 mm.A prototype was completed and tested with 55Fe X-ray.The high-pressure vessel was designed and constructed with high-strength aluminum alloy.A position resolution of about 4.6mm×2.3 mm(FWHM)and efficiency>65%for neutrons with wavelength of 1.8?was determined after the operational gas filled. | TIAN LiChao QI HuiRong SUN ZhiJia WANG YanFeng ZHANG Jian LIU RongGuang ZHAO YuBin ZHANG HongYu ZHAO DongXu DONG Jing XIE Wan YANG GuiAn OUYANG Qun CHEN YuanBo | 2014 | Science China(Physics,Mechanics & Astronomy)2014，57，11： | 1 |
| 14 | Rheological characterization of storage-stable SBS-modified asphalts 显示文摘 | Guian Wen Yong Zhang Yinxi Zhang | 2002 | Polymer Tesing2002，21，3： | 1 |
| 15 | Rheological characterization of storage-stable SBS-modified asphalts 显示文摘 | Wen Guian Zhang Yong Zhang Yinxi | 2002 | Polymer Testing2002，21，： | 1 |
| 16 | Vulcanization characteristics of asphalt/SBS blends显示文摘 | Wen Guian Zhang Yong Zhang Yinxi | 2001 | J Appl Polym Sci2001，82，4： | 1 |
| 17 | Improved properties of SBS- modified asphalts with dynamic vulcanization 显示文摘 | Wen Guian Zhang Yong Zhang Yinxi | 2002 | Polym Eng Sci2002，42，5： | 1 |
| 18 | Rheological characterization of storage-stable SBS-modlfied asphalts 显示文摘 | Wen Guian Zhang Yong Zhang Yinxi | 2002 | Polymer Testing2002，21，： | 1 |
| 19 | 显示文摘 | Guian Wen Yong Zhang | 2002 | Polymer Testing2002，21，3： | 1 |
| 20 | Rheological characterization of storage-stable SBS-modified asphalt显示文摘 | Wen Guian Zhang Yong Zhang Yinxi | 2002 | Polym Test2002，21，3： | 1 |
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