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Assembly of Highly Ordered 2D Arrays of Silver-PNIPAM Hybrid Microgels

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Chinese Journal of Polymer Science 2017年第10期35卷 1212-1221页

作者： jun-ying weng Zhuo Tang 关英 X.X.Zhu 张拥军 Key Laboratory of Functional Polymer Materials and State Key Laboratory of Medicinal Chemical Biology The Co-Innovation Center of Chemistry and Chemical Engineering of Tianjin Institute of Polymer Chemistry College of Chemistry Nankai University Tianjin 300071 China Department of Chemistry Universite de Montreal C. P. 6128 Succursale Centre-ville Montreal QC H3C 3J7 Canada

A strategy was developed for the synthesis of highly ordered 2D arrays of Ag-PNIPAM hybrid microgel. The highly ordered 2D arrays of PNIPAM microgel were prepared by dispersing PNIPAM microgel on a charge-reversible substrate. The microgel spheres self-assembled into a 3D colloidal crystal, and the first 111 plane was fixed in situ onto the substrate as a result of spontaneous charge reversal of the substrate, leaving a high-quality 2D array of PNIPAM microgel. Ag nanoparticles were then synthesized in situ inside the microgel spheres by introduction of Ag＋ ions into the microgel spheres and reduction with sodium borohydride. The resulting 2D arrays are highly ordered. The inter-particle distance in the array can be tuned. In addition, the method allows the synthesis of large size arrays and the use of nonplanar substrate.

关键词： bonding conductive triazine intermolecular Hydrogen PEDOT responsive glycol polyethylene compressive

Oxidation behavior of Nb–24Ti–18Si–2Al–2Hf–4Cr and Nb–24Ti–18Si–2Al–2Hf–8Cr hypereutectic alloys at 1250°C

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Rare Metals 2017年第3期36卷 168-173页

作者： Zhen Hong Hu Zhang jun-Fei weng Lin-Fen Su Zhen Li Li-Na Jia School of Materials Science and Engineering Beihang UniversityBeijing 100191China

Nb-24Ti-18Si-2Al-2Hf-4Cr and Nb-24Ti-18Si-2Al-2Hf-8Cr alloys were prepared by arc melting in a water-cooled crucible under argon *** characteristics and oxidation resistance of the alloys at 1250 ℃ were *** results show that,when the Cr content is 4 at%,the microstructures consist of （Nb,Ti）ss and Nb5Si3;as Cr content increases to 8 at%,C14 Laves phase Cr2Nb is *** isothermal oxidation tests show that the oxidation kinetics of the two alloys follow similar *** weight gains of the two alloys after oxidation at 1250 ℃ for 100 h are 235.61 and 198.50 ***-2,*** oxidation,SiO2,TiO2,Nb2O5 and CrNbO4 are formed at ***,Ti2Nb10O29 is formed after oxidation for 20 min and begins to change into TiNb2O7 as the oxidation ***2 is formed as solid state at first but later evolves into glassy state to improve the cohesion of the *** oxidation for 100 h,oxidation products consist of SiO2,TiNb2O7,Nb2O5 and CrNbO4.

关键词： Nb-Si-based alloy lntermetallics Microstructural characteristics Oxidation

Microstructures and high-temperature oxidation behavior of directionally solidified Nb-Si-based alloys with Re additions

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Rare Metals 2023年第1期42卷 273-280页

作者： Jie-Chao Zhang Li-Na Jia jun-Fei weng Lin-Fen Su Bin Kong Hu Zhang School of Materials Science and Engineering Beihang UniversityBeijing100191China

High-temperature oxidation behavior of directionally solidified(DS) Nb-Si-based alloys with Re additions was investigated at 1200 and 1250℃,*** and high-temperature oxidation behavior of the alloys were *** show that the microstructures in vertical section of Nb-24Ti-15Si-4Cr-2Al-2Hf-xRe(x=0,1,3;at%) alloys grow parallel to the withdrawal direction and the cross section exhibits bud-like *** bud-like structures become finer with more Re *** weight gain of the Nb-24Ti-15Si-4Cr-2Al-2Hf-3Re alloy after oxidation at 1200℃ for 100 h is 198.1 mg·cm^(-2),and it is a bit higher at 1250℃.The other two alloys perform somewhat *** influence of Re addition on the oxidation resistance at 1250℃ is more significant than that at 1200 ℃.Although Re addition does not benefit obviously the high-temperature oxidation resistance of the DS samples,it does not compromise the oxidation resistance with a certain amount of Re additions in contrast with the alloy without Re addition.

关键词： Nb-Si alloys Directional solidification Rhenium addition Oxidation behavior Microstructure

Influence of different illuminations with xenon or microwave sulfur lamp on jointing and tillering of wheat

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Chinese Science Bulletin 2002年第17期47卷 1433-1437,1498页

作者： CHEN Qilin LIU Yuequn YU Xinjian CHEN Jinxing weng jun XU Chunhe Shanghai Institute of Plant Physiology Chinese Academy of SciencesShanghai 200032China Institute of Electronic Lamp Fudan UniversityShanghai 200433China

The emission of microwave sulfur lamp is mainly composed of visible light. The sulfur lamp, producing little infrared radiation, has high efficiency, long duration of illumination and less energy consumption. In order to probe the agricultural application of the lamp, experiments were carried out with wheat (cv. Yangmai 158) to emphatically study illuminating effects of xenon or sulfur lamp on tillering, jointing and net photosynthetic rate during tillering and jointing periods. Results indicated that there is almost no difference in net photosynthetic rate of wheat leaves growing under different lamps. Xenon lamp significantly advanced the time of jointing, decreased number of tillers, number of total leaves per plant and leaf size, as well as inhibited root growth. In contrast with xenon lamp, sulfur lamp evidently delays the time of heading and grain maturation, increased number of heads per plant, head length, total number of grains per plant, head weight and total grain weight per plant,

关键词： sulfur lamp xenon lamp joint tiller wheat.

Study on the Optimum N Rates Under Spring Cabbage-Maize-Winter Cabbage Rotation System

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Agricultural Sciences in China 2007年第11期6卷 1322-1329页

作者： HE Chuan-long GUO Xi-sheng WANG weng-jun WU Ji The Soil and Fertilizer Institute Anhui Academy of Agricultural Sciences Hefei 230031 P.R. China

In this paper, field trials in two soils with different Nmin were conducted to study the effects of mineral N content （Nmin） in soil on the maximum yield N rate （MYNR）, N recovery of cabbage under spring cabbage-maize-winter cabbage rotation system, and the correlation of N fertilization with cabbage yield and quality, and to provide the theoretical basis for N recommendation for high-yield, quality, and safety production of vegetables. The effects of six N rates of 0, 90, 180, 270, 360, and 450 kg ha-1 on the yield, N recovery of spring cabbage, maize, and winter cabbage, water-soluble sugar, Vc, and nitrate content of vegetables were observed. The results showed that soil Nmin had a remarkable influence on the MYNR in the first spring cabbage season. The MYNR for spring cabbage lessened in the soil with high Nmin. Soil Nmin, could be helpful to N recommendation only for the seasonal growing crop because its effects on the following crop yield was less with the active transformation of soil Nmin. The farmer＇s practice was 1.8-3.2 times higher than the MYNR of cabbage resulted in the nitrate enrichment of groundwater. Both N application rate and Nmin. in the soil profile affected N recovery, whereas, the relay intercropping maize in the cabbage field increased the N recovery at a higher N application rate. Lower N rate （less than 90 kg ha-1） improved the yield and quality of cabbage at the same time; higher N rates increased cabbage yield, but decreased the quality; extremely high N rates of application deceased both yield and quality of cabbage. It was concluded that the soil Nmin had close correlations with MYNR and N recovery of the seasonal growing cabbage. Although the residual effects of the N fertilizer were obvious in Shajiang black meadow soil, cabbage-maize rotation increased the N recovery in treatments with higher N rates. Considering the effects of N rates on cabbage yield and quality, it is necessary to reduce the N rate and lower the yield target for

关键词： cabbage rotation system N rate Shajiang black meadow soil

Multiferroic tunnel junctions

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Frontiers of physics 2012年第4期7卷 380-385页

作者： Yue-Wei Yin Muralikrishna Raju Wei-Jin Hu Xiao-jun weng Ke Zou jun Zhu Xiao-Guang Li Zhi-Dong Zhang Qi Li Department of Physics Pennsylvania State University University Park PA 16802 USA Hefei National Laboratory for Physical Sciences at Microscale Department of Physics University of Science and Technology of China Hefei 230026 China Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China Department of Materials Science and Engineering Materials Research Institute Pennsylvania State University University Park PA 16802 USA

Magnetic tunnel junctions with ferroelectric barriers, often referred to as multiferroic tunnel junc- tions, have been proposed recently to display new functionalities and new device concepts. One of the notable predictions is that the combination of two charge polarizing states and the parallel and antiparallel magnetic states could make it a four resistance state device. We have recently studied the ferroelectric tunneling using a scanning probe technique and multiferroic tunnel junctions using ferromagnetic Lao.7Cao.3MnO3 and ***.3MnO3 as the electrodes and ferroelectric （Ba, Sr）TiO3 as the barrier in trilayer planner junctions. We show that very thin （Ba, Sr）TiO3 films can sustain ferroelectricity up till room temperature. The multiferroic tunnel junctions show four resistance states as predicted and can operate at room temperatures.

关键词： multiferroic tunnel junction ferroelectric film tunneling magnetoresistance effect tun-neling electroresisitance effect magnetoelectric coupling

Feasibility and efficacy evaluation of metallic biliary stents eluting gemcitabine and cisplatin for extrahepatic cholangiocarcinoma

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World Journal of Gastroenterology 2020年第31期26卷 4589-4606页

作者： Jing-Bo Xiao jun-Yong weng Yang-Yang Hu Gui-Long Deng Xin-Jian Wan Department of Gastroenterology and Shanghai Key Laboratory of Pancreatic Diseases Shanghai General HospitalShanghai Jiaotong University School of MedicineShanghai 201620China Hospitalist and Internal Medicine Inpatient Department Shanghai Jiahui International HospitalShanghai 200233China Department of General Surgery Shanghai General HospitalShanghai Jiaotong University School of MedicineShanghai 201620China Department of Gastroenterology Shanghai Jiao Tong University Affiliated Sixth People's HospitalShanghai 200233China

BACKGROUND Effective endoscopic management is fundamental for the treatment of extrahepatic cholangiocarcinoma(ECC).However,current biliary stents that are widely used in clinical practice showed no antitumor ***-eluting stents(DESs)may achieve a combination of local chemotherapy and biliary drainage to prolong stent patency and improve *** To develop novel DESs coated with gemcitabine(GEM)and cisplatin(CIS)-coloaded nanofilms that can maintain the continuous and long-term release of antitumor agents in the bile duct to inhibit tumor growth and reduce systemic *** Stents coated with different drug-eluting components were prepared by the mixed electrospinning method,with poly-L-lactide-caprolactone(PLCL)as the drug-loaded nanofiber membrane and GEM and/or CIS as the antitumor *** different DESs were manufactured with four drug-loading ratios(5%,10%,15%,and 20%),including bare-loaded(PLCL-0),single-drug-loaded(PLCL-GEM and PLCL-CIS),and dual-drug-loaded(PLCL-GC)*** drug release property,antitumor activity,and biocompatibility were evaluated in vitro and in vivo to confirm the feasibility and efficacy of this novel DES for *** The in vitro drug release study showed the stable,continuous release of both GEM and CIS,which was sustained for over 30 d without an obvious initial burst,and a higher drug-loaded content induced a lower release *** drug-loading ratio of 10%was used for further experiments due to its ideal inhibitory efficiency and relatively low *** drug-loaded nanofilms effectively inhibited the growth of EGI-1 cells in vitro and the tumor xenografts of nude mice in vivo;in addition,the dual-loaded nanofilm(PLCL-GC)had a significantly better effect than the single-drug-loaded nanofilms(P0.05)or histopathological changes were observed between the single-loaded and drug-loaded nanofilms after stent placement in the normal porcine bi

关键词： Extrahepatic cholangiocarcinoma Drug-eluting stent Local chemotherapy Gemcitabine Cisplatin Biliary obstruction

Signaling Mechanism for Modulation by GLP-1 and Exendin-4 of GABA Receptors on Rat Retinal Ganglion Cells

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Neuroscience Bulletin 2022年第6期38卷 622-636页

作者： Tao Zhang Hang-Ze Ruan Yong-Chen Wang Yu-Qi Shao Wei Zhou Shi-jun weng Yong-Mei Zhong State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science Institutes of Brain ScienceFudan UniversityShanghai 200032.China

Glucagon-like peptide-1(GLP-1)is expressed in retinal neurons,but its role in the retina is largely ***,we demonstrated that GLP-1 or the GLP-1 receptor(GLP-1R;a G protein-coupled receptor)agonist exendin-4 suppressed-aminobutyric acid receptor(GABAR)-mediated currents through GLP-1Rs in isolated rat retinal ganglion cells(GCs).Pre-incubation with the stimulatory G protein(G,)inhibitor NF 449 abolished the exendin-4 *** exendin-4-induced suppression was mimicked by perfusion with 8-Br-cAMP(a cAMP analog),but was eliminated by the protein kinase A(PKA)inhibitor RpcAMP/***_exendin-4 effect was accompanied by an increase in[Ca2+];of GCs through the IP3-sensitive pathway and was blocked in Ca2+-free ***,when the activity of calmodulin(CaM)and CaMdependent protein kinase II(CaMKII)was inhibited,the exendin-4 effect was *** with this,exendin-4 suppressed GABAR-mediated light-evoked inhibitory postsynaptic currents in GCs in rat retinal *** results suggest that exendin-4-induced suppression may be mediated by a distinct G,/cAMP-PKA/IPs/Ca+/CaM/CaMKIl signaling pathway,following the activation of GLP-1Rs.

关键词： Glucagon-like peptide-1 Exendin-4 GABA current Retinal ganglion cells Neuromodulation

Pseudo-Bonding Interaction between Boron-doped Heterofullerene and Zinc Porphine Predicted by DFT Calculation

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Chinese Journal of Chemical Physics 2014年第3期27卷 285-290页

作者： jun-ying weng Ting-ting Zhou Ying-hui Zhang Chemistry Department Nankai University Tianjin 300071 China

Theoretical study on the supramolecular complexes formed between boron-doped het- erofullerene （C59B） and zinc porphine （ZnF）, namely C59B-ZnP and its anion species C59B-ZnP, was performed by density functional theory calculation at wB97XD/6-31G（d） level. Strong interaction between porphyrin and heterofullerene moiety was predicted for these complexes based on geometry and electronic structure analysis. Especially, pseudobonding interaction occurring between the B atom of fullerene and the N atom of porphyrin was predicted to occur in C59B-ZnP complex, but be broken in C59B-ZnP complex. Time-dependent density functional theory calculation manifests the redshift of electron absorption for ZnP upon the interaction with heterofullerene.

关键词： Boron-doped fullerene Zinc porphine Supramolecular complex DFT calculation