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| 1 | Composition and solution properties of fluorinated block copolymers and their surface structures in the solid state显示文摘A series of diblock copolymers composed of methyl methacrylate and 2-perfluorooctylethyl methacry-late(PMMA144-b-PFMAn) with various PFMA block lengths were prepared by atom transfer radical po-lymerization(ATRP).The surface structures and properties of these polymers in the solid state and in solution were investigated using contact angle measurement,X-ray photoelectron spectroscopy(XPS),sum frequency generation(SFG) vibrational spectroscopy,surface tension and dynamic laser light scattering(DLS).It was found that with increasing PFMA block length,water and oil repellency de-creased,the ratio of F/C increased with increasing film depth,and the degree of ordered packing of the perfluoroalkyl side chains at the surface decreased.When the number of PFMA block units reached 10,PMMA segments were detected at the copolymer surface,which was attributed to the PFMA block length affecting molecular aggregation structure of the copolymer in the solution and the interfacial structure at the air/liquid interface,which in turn affects surface structure formation during solution solidification.The results suggest that copolymer solution properties play an important role in struc-ture formation on the solid surface. | NI HuaGang XUE DongWu WANG XiaoFang ZHANG Wei WANG XinPing SHEN ZhiQuan | 2009 | Science China Chemistry2009，52，2： | 6 |
| 2 | SYNTHESIS OF HYDROPHILIC ZnS NANOCRYSTALS AND THEIR APPLICATION IN PHOTOCATALYTIC DEGRADATION OF DYE POLLUTANTS显示文摘Hydrophilic ZnS nanocrystals with narrow size distribution were synthesized via homogeneous precipita- tion using EDTA as stabilizer. The as-synthesized products were characterized with XRD, TEM, HRTEM and UV-Vis spectrum. UV-Vis spectra showed that ZnS nanocrystals exhibited strong quantum-confined effect with a blue shift in the band gap of light absorbance. The photocatalytic activity of these nanocrystals was also investigated for the liquid phase photocatalytic degradation of Basic Violet 5BN (BV5) dye under UV irradiation. It was found that the ZnS nanocrystals had good catalytic activity for photodegradation of BV5. | JunpingLi YaoXu YongLiu DongWu YuhanSun | 2004 | China Particuology2004，2，6： | 5 |
| 3 | Determination of interface layer thickness of a pseudo two—phase system by extension of the Debye equation显示文摘The Debye equation with slit-smeared small angle x-ray scattering(SAXS) data is extended form an ideal two-phase system to a pseudo two-phase system with the presence of the interface layer,and a simple accurate solution is proposed to determine the average thickness of the interface layer in porous materials.This method is tested by experimental SAXS data,which were measured at 25℃,of organo-modified mesoporous silica prepared by condensation of tetraethoxysiland(TEOS) and methyltriethoxysilane(MTES) using non-ionic neutral surfactant as template under neutral condition. | ZhiHongLi YanJunGong MinPu DongWu YuHanSun JunWang YiLiu BaoZh | 2001 | Beijing Synchrotron Radiation Facility2001，，2： | 3 |
| 4 | Molecular basis for ligand activation of the human KCNQ2 channel显示文摘The voltage-gated potassium channel KCNQ2 is responsible for M-current in neurons and is an important drug target to treat epilepsy,pain and several other diseases related to neuronal hyper-excitability.A list of synthetic compounds have been developed to directly activate KCNQ2,yet our knowledge of their activation mechanism is limited,due to lack of high-resolution structures.Here,we report cryo-electron microscopy(cryo-EM)structures of the human KCNQ2 determined in apo state and in complex with two activators,ztz240 or retigabine,which activate KCNQ2 through different mechanisms.The activator-bound structures,along with electrophysiology analysis,reveal that ztz240 binds at the voltage-sensing domain and directly stabilizes it at the activated state,whereas retigabine binds at the pore domain and activates the channel by an allosteric modulation.By accurately defining ligand-binding sites,these KCNQ2 structures not only reveal different ligand recognition and activation mechanisms,but also provide a structural basis for drug optimization and design. | Xiaoxiao Li Qiansen Zhangc Peipei Guo Jie Fu Lianghe Mei Dashuai Lv Jiangqin Wang Dongwu Lai Sheng Ye Huaiyu Yang Jiangtao Guo | 2021 | Cell Research2021，31，1： | 3 |
| 5 | PREPARATION OF BaSO4 NANOCRYSTALS BY CONTROLLED PRECIPITATION显示文摘 | JunpingLi YaoXu DongWu YuhanSun | 2003 | China Particuology2003，1，3： | 1 |
| 6 | Advantages of immersion freezing for qualitypreservation of litchi fruit during frozen storage显示文摘 | Dongwu Lianga Fengying Lina Gongming Yanga | 2015 | Lebensmittel-Wissenschaft und-Technologie2015，35，： | 1 |
| 7 | Macro–meso two-scale model for predicting the VOC diffusion coefficients and emission characteristics of porous building materials显示文摘 | Jianyin Xiong Yinping Zhang Xinke Wang Dongwu Chang | 2008 | Atmospheric Environment2008，，21： | 1 |
| 8 | A steroid fraction of chloroform extract from bee pollen of Brassica campestris induces apoptosis in human prostate cancer PC‐3 cells显示文摘 | Yao‐DongWu Yi‐JiaLou | 2007 | Phytother. Res2007，，11： | 1 |
| 9 | Macro meso two-scale model for predicting the VOC diffusion coefficients and emission characteristics of porous building materials 显示文摘 | Jianyin Xiong Yinping Zhang Xinke Wang Dongwu Chang | 2008 | Atmospheric Environment2008，42，21： | 1 |
| 10 | Undercrossing disturbance control criterion for shield tunnel considering the building existing deformation 显示文摘 | Ge Shiping Xie Dongwu Ding Wenqi | 2011 | Journal of Tongji Uni- versity ( Natural Science)2011，39，11： | 1 |
| 11 | Stretch current- induced abnormal impulses in CaMKIIδ knockout mouse ven- tricular myocytes 显示文摘 | LAI Dongwu XU Lin CHENG Jun | 2013 | J Cardiovasc Electrophysiol2013，24，4： | 1 |
| 12 | The effect of curcumin on breast cancer cells显示文摘 | LIU Dongwu CHEN Zhiwei | 2013 | Journal of Breast Cancer2013，16，2： | 1 |
| 13 | Influence and experiment of cable-net manufacturing errors on surface accuracy of mesh reflector antennas显示文摘Cable-net structures are of substantial importance in the construction of large mesh reflector antennas.Owing to the inevitable errors in their manufacturing process,the reflector surface accuracy deteriorates.This study makes a comprehensive investigation of random manufacturing errors during constructing the mesh reflector antennas,and analyze its influence on reflector surface accuracy.Firstly,the sensitivity of reflector surface accuracy with respect to the random errors of the unstressed cable length is mathematically deducted.Secondly,a non-button connecting method is proposed and analyzed to reduce manufacturing errors.Thirdly,two physical experiment models based on 2.62-meter mesh reflector antenna are made.Finally,numerical examples and experimental tests are given to demonstrate the effectiveness of the proposed method.Compared with the traditional method,the proposed method can effectively reduce the influence of the manufacturing errors on the reflector surface accuracy.Moreover,the reduction in the sizes of the nodes also reduces the risk of entanglement of the mesh reflector antenna during the deployment process,and thereby improves the deployment reliability. | Zihan SUN Baoyan DUAN Yiqun Zhang Dongwu YANG | 2023 | Chinese Journal of Aeronautics2023，36，2： | 0 |
| 14 | Determination of Average wall Thickness of Mesoporous silica显示文摘Small X-ray Scattering (SAXS) experiment using Synchrotron Radiation as X-ray source was used to determine the average wall thickness of mesoporous silica prepard by condensation of tetraethylorthosilicate(TEOS) using non-ionic alkylpolyethyleneoxide(AEO9) surfactant as templates.The results agreed with that of high-resolution TEM(HRTEM) measurement. | ZhiHongLi YanJunGONG DongWu YuHanSUN JunWANG YiLIU BaoZhongDON | 2001 | Beijing Synchrotron Radiation Facility2001，，2： | 0 |
| 15 | SAXS andalysis of interface in organo—modified mesoporous silica显示文摘A small-angle x-ray scattering(SAXS)technique using synchrotron radiation as the x-ray source has been employed to characterize the microstructure of mesoporous silica prepared by one-pot template-directed synthesis methodology.The scattering of pure silica agreed with Porod’s law.the scattering of organomodified mesoporous silica showed a negative deviation from Porod’s law,suggesting that an interfacial layer exists between the pores and silica matrix.It was the organic groups comprising the interface,as shown by ^29Si cross-polarization magic-angle spinning nuclear magnetic resonance imaging (^29Si cp MAS/NMR) and Fourier transform infrared spectroscopy(FTIR),that caused this negative deviation of SAXS intensity from Porod’s law,and the average thichness of the interfacial layer could be deduced from this negative deviation.Copyright 2001 john Wiley and Sons,Ltd. | ZhiHongLi YanJunGong DongWu YuHanSun JunWang YiLiu BaozhongDon | 2001 | Beijing Synchrotron Radiation Facility2001，，2： | 0 |
| 16 | Correction of negative deviation from Dedye’s theory显示文摘 | ZHIHONGLI YANJUNGONG DONGWU YUHANSUN ZHIHONGLI YANJUNGONG DONG | 2001 | Beijing Synchrotron Radiation Facility2001，，2： | 0 |
| 17 | Fractals of Silica Aggregates显示文摘Silica aggregates were prepared by base-catalyzed hydrolysis and condensation of alkoxides in alcohol.Polyethylene glycol(PEG) was used as organic modifier.The sols were characterized using Small Angle X-ray Scattering (SAXS) with synchrotron radiation as X-ray source.The structure evolution during the sol-gel process was determined and described in terms of the fractal geometry.As-produced silica aggregates were found to be mass fractals.The fractl dimensions spanned the regime 2.1-2.6 corresponding to more branched and compact structures.Both RLCA and Eden models dominated the kinetic growth under base-catalyzed condition. | ZhinhongLi DongWu Yuhansun JunWang YiLiu BaozhongDong Zhinhong | 2001 | Beijing Synchrotron Radiation Facility2001，，2： | 0 |
| 18 | Isolation and Identification of Bacterial Pathogens of Proteus vulgaris and Chryseobacterium meningosepticum from Peodiscus sinensis and Observation on the Histopathology显示文摘Two dominant strains of bacteria Lb18-01 and Lb18-02 were isolated and purified from scabies,liver and intestine of diseased Peodiscus sinensis.By artificial infection test,the two strains were verified as pathogenic strains with similar characters to that of natural infectious cases.The strains Lb18-01 and Lb18-02 showed strong pathogenicity to healthy P.sinensis in the artificial infection experiment,so they were the pathogenic strain of the disease.According to the morphology,physicochemical characteristics,16 S rDNA sequence analysis and phylogenetic tree clustering,the pathogenic strains Lb18-01 and Lb18-02 were identified as Proteus vulgaris and Chryseobacterium meningosepticum which were tolerant to 20 drugs such as penicillin,tetracycline and ampicillin.Histopathological observation on diseased P.sinensis showed the pathological symptoms of sepsis such as hemorrhage and congestion of liver,spleen and intestine,and glomerular disintegration. | Guomin JIANG Li LIU Wuying CHU Zhigang HE Li ZOU Dongwu WANG Shiming DENG | 2021 | Agricultural Biotechnology2021，10，2： | 0 |
| 19 | Processing and Sintering of Agglomerate-free CaO-ZrO2 Powder显示文摘Coprecipitation supercritical fluid drying technology has been employed to synthesize calcia-stabilized zirconia ultrafine powder with low-cost inorganic salts as the starting materials. The sintering behaviors of these powders were also investigated. The results showed that supercritical fluid drying could effectively alleviate the hard agglomeration of grains during the gel drying process, and the morphology of the powder retained the network texture of the original gel.The resulting particles were characterized by small particle size (5~20 nm), better monodispersity and high surface area, which gave rise to high activity and sinterability. Consequently, these powders could readily be compacted into the desired shape and their densification could be carried out in shorter time and at lower temperatures. For instance,nanometer-sized powder calcined at 600℃ for 2 h could be cold-pressed into a green body and sintered at 1100° for 0.5 h to attain a dense body with bulk density of 5.9718 g/cm3 and specific pore volume of 0.0008 cm3/g. | LipingLIANG Shu'eDANG DongWU YuhanSUN | 2004 | Journal of Materials Science & Technology2004，20，4： | 0 |
| 20 | Structural basis for the gating modulation of Kv4.3 by auxiliary subunits显示文摘Dear Editor,Kv4.3 is an A-type voltage-gated potassium channel that is characterized by fast activation at subthreshold membrane potentials,rapid inactivation,and quick recovery from inactiva-tionJ In neurons,Kv4.3 conducts the transient subthreshold somatodendritic A-type potassium current(Isa),knock down of which results in neuropathic pain and epilepsy.2 In cardiomyocytes,Kv4.3 generates the transient outward potassium current(lto)and its dysfunction is related to a variety of heart diseases,such as hypertrophy,heart failure,myocardial infarction,heart valvular disease,atrial fibrillation,and diabetic cardiomyopathy. | Demin Ma Cheng Zhao Xiaochen Wang Xiaoxiao Yi Zha Yan Zhang Guosheng Fu Ping Liang Jiangtao Guo Dongwu Lai | 2022 | Cell Research2022，32，4： | 0 |
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