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Now showing items 81 - 96 of 229

  • Investigation of non-covalent interaction of ANF promoter DNA and polyamides containing N-methylimidazole and N-methylpyrrole amino acids by electrospray ionization mass spectrometry

    He, Xiangwei   Li, Sufang   Xu, Ming   Lin, Sen   Zhou, Jiang   Yuan, Gu  

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  • Alterations of steroid receptor coactivator-1 (SRC-1) immunoreactivities in specific brain regions of young and middle-aged female Sprague-Dawley rats (vol 1381, pg 88, 2011) RID B-4488-2008

    Zhang, Dongmei   Guo, Qiang   Bian, Chen   Zhang, Jiqiang   Lin, Sen   Su, Bingyin  

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  • Perovskite-supported Pt single atom for methane activation

    Wan, Qiang   Fung, Victor   Lin, Sen   Wu, Zili   Jiang, De-en  

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  • A Networked Virtual Experiment System Based on Virtual Campus

    Pan, Jia-hao   Lin, Sen   Wang, Zhen   Guo, Lin   Guo, Tian-tai  

    Virtual reality (VR) has found many applications in education; and the resources of virtual education such as virtual campus; virtual laboratory etc. are used more and more widely; especially in the field of higher education. But so far virtual campus was mainly regarded as a means of image exhibition; and virtual laboratories were no more than 2D display of experimental processes and equipments. To make better use of these resources; this paper put forward the concept of networked virtual experiment system based on virtual campus by combining the virtual laboratory and virtual campus with the technique of LAN (Local area network); and establishes its theoretical model. Finally; a networked virtual experiment system based on virtual campus is developed using VRML and 3DSMAX. Networked virtual experiment system based on virtual campus has a promising future for various applications in higher education.
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  • High CO2 Selectivity of ZnO Powder Catalysts for Methanol Steam Reforming

    Halevi, Barr   Lin, Sen   Roy, Aaron   Zhang, He   Jeroro, Ese   Vohs, John   Wang, Yong   Guo, Hua   Datye, Abhaya K.  

    To investigate the contribution of the ZnO supports in PdZn/ZnO catalysts used for methanol steam reforming (MSR), we have investigated methanol steam reforming on two different ZnO powder samples. The powder samples included a commercial powder with both polar and nonpolar surfaces exposed, and a plate-like sample preferentially exposing the polar ZnO(001)/ (00 (1) over bar) surfaces. ZnO was found to be active and selective for MSR, with the polar surfaces being most active, but the activation energy for reaction (similar to 100 kJ/mol) was much larger than on unsupported PdZn(similar to 50 kJ/mol) or PdZn/ZnO. The experimental findings are supported by DFT calculations on key elementary steps and reaction intermediates on the ZnO(001) surface. We conclude that the contribution of the ZnO support to the MSR activity PdZn/ZnO catalyst system may not be very significant.
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  • Molecular Engineering of Conjugated Polybenzothiadiazoles for Enhanced Hydrogen Production by Photosynthesis

    Yang, Can   Ma, Beatriz Chiyin   Zhang, Linzhu   Lin, Sen   Ghasimi, Saman   Landfester, Katharina   Zhang, Kai A. I.   Wang, Xinchen  

    The search for metal-free organic photocatalysts for H-2 production from water using visible light remains a key challenge. Reported herein is a molecular structural design of pure organic photocatalysts, derived from conjugated polybenzothiadiazoles, for photocatalytic H-2 evolution using visible light. By alternating the substitution position of the electron-withdrawing benzothiadizole unit on the phenyl unit as a comonomer, various polymers with either one-or threedimensional structures were synthesized and the effect of the molecular structure on their catalytic activity was investigated. Photocatalytic H-2 evolution efficiencies up to 116 mu mol h(-1) were observed by employing the linear polymer based on a phenyl-benzothiadiazole alternating main chain, with an apparent quantum yield (AQY) of 4.01% at 420 nm using triethanolamine as the sacrificial agent.
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  • Vps35-deficiency impairs SLC4A11 trafficking and promotes corneal dystrophy

    Liu, Wei   Tang, Fu-Lei   Lin, Sen   Zhao, Kai   Mei, Lin   Ye, Jian   Xiong, Wen-Cheng  

    Vps35 (vacuolar protein sorting 35) is a major component of retromer that selectively promotes endosome-to-Golgi retrieval of transmembrane proteins. Dysfunction of retromer is a risk factor for the pathogenesis of Parkinson's disease (PD) and Alzheimer's disease (AD). However, Vps35/retromer's function in the eye or the contribution of Vps35-deficiency to eye degenerative disorders remains to be explored. Here we provide evidence for a critical role of Vps35 in mouse corneal dystrophy. Vps35 is expressed in mouse and human cornea. Mouse cornea from Vps35 heterozygotes (Vps35(+/-)) show features of dystrophy, such as loss of both endothelial and epithelial cell densities, disorganizations of endothelial, stroma, and epithelial cells, excrescences in the Descemet membrane, and corneal edema. Additionally, corneal epithelial cell proliferation was reduced in Vps35-deficient mice. Intriguingly, cell surface targeting of SLC4A11, a membrane transport protein (OH- /H+ /NH3 /H2O) of corneal endothelium, whose mutations have been identified in patients with corneal dystrophy, was impaired in Vps35-deficient cells and cornea. Taken together, these results suggest that SLC4A11 appears to be a Vps35/retromer cargo, and Vps35-regulation of SLC4A11 trafficking may underlie Vps35/retromer regulation of corneal dystrophy.
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  • One-Step Synthesis of Trirutile Oxides ZnBi2O6-Graphene Oxide with Enhanced Photocatalytic Activity

    Wang, Hao   Wang, Haiyan   Song, Xihang   Huang, Kai   Liang, Ce   Lin, Sen   Wang, Wenjun   Yuan, Qingxin   Xu, Kun   Du, Yinxiao   Liu, Jun   Fan, Dongyu   Yang, Hujiang   Zhang, Ru   Wang, Yonggang   Lei, Ming  

    Trirutile-structured pentavalent zinc bismuthate (ZnBi2O6) has efficient visible light photocatalytic activities owing to its narrow gap (ca. 1.7 eV). To obtain higher photocatalytic performance, graphene oxide (GO) is introduced into this catalyst. In my work, novel ZnBi2O6-graphene (ZnBi2O6-GO) nanocomposites have been successfully obtained via a one-step hydrothermal method. The characterization results showed that GO was successfully loaded in the ZnBi2O6. In the photocatalytic experiment, ZnBi2O6-GO composites exhibited better photocatalytic activities than the pure ZnBi2O6 and the optimal photocatalytic activity was obtained when the GO content was 2.0 wt%. The main reason for enhanced photocatalytic activity is that introduction of GO can restrain the recombination of photo-generated electron-hole pairs and increase the absorption ability for dyes.
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  • Hierarchically Porous MgMn2O4 Microspheres Assembled with Nanosheets as High Oxygen Reduction Catalyst

    Liang, Ce   Wang, Hao   Huang, Kai   Lin, Sen   Liu, Wenjun   Bi, Ke   Lei, Ming  

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  • Undernutrition Shapes the Gut Microbiota and Bile Acid Profile in Association with Altered Gut-Liver FXR Signaling in Weaning Pigs

    Lin, Sen   Yang, Xiaomin   Yuan, Peiqiang   Yang, Jiameng   Wang, Peng   Zhong, Heju   Zhang, Xiaoling   Che, Lianqiang   Feng, Bin   Li, Jian   Zhuo, Yong   Lin, Yan   Xu, Shengyu   Wu, De   Burrin, Douglas G.   Fang, Zhengfeng  

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  • Room-temperature production of silver-nanofiber film for large-area, transparent and flexible surface electromagnetic interference shielding

    Lin, Sen   Wang, Haiyang   Wu, Fan   Wang, Qingmin   Bai, Xiaopeng   Zu, Di   Song, Jianan   Wang, Dong   Liu, Zhenglian   Li, Ziwei   Tao, Nian   Huang, Kai   Lei, Ming   Li, Bo   Wu, Hui  

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  • A facile route to strontium titanate nanocubes/reduced graphene oxide nanocomposites and their enhanced adsorption and photocatalytic activity

    Pan, Xiaolong   Lin, Sen   Bi, Ke   Hao, Yanan   Lei, Ming  

    Novel strontium titanate nanocubes/reduced graphene oxide (STO/rGO) nanocomposites were successfully synthesized via a two-step route, including a rapid sol-precipitation process and a subsequent hydrothermal process. TEM images indicate that the nanocomposites are composed of rGO-supported monodispersed 5-10 nm STO nanocubes. Compared with pure STO, STO/rGO nanocomposites exhibit better adsorption and photocatalytic performance. Particularly, the sample with 6 wt% rGO exhibits the best enhanced photocatalytic performance. The photocatalysis measurements indicate that the rGO sheets not only exhibit superior adsorptive property but also behave as the photocatalysis supporter due to the synergistic effect of the accelerated separation of photogenerated electron-hole pairs. The novel synthesis route provides possibility to design perovskite/rGO nano-photocatalysts. (C) 2016 Elsevier B.V. All rights reserved.
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  • Kinetic and mechanistic investigations of the degradation of sulfachloropyridazine in heat-activated persulfate oxidation process

    Liu, Lin   Lin, Sen   Zhang, Wei   Farooq, Usman   Shen, Genxiang   Hu, Shuangqing  

    Sulfachloropyridazine (SCP) has significant threat to natural environment and human health worldwide. Efforts have been made to remove SCP using traditional water treatment technologies but the outputs achieved are limited. In this study, we focused on heat-activated persulfate oxidation of SCP. Various factors have been investigated, such as PS concentration, initial pH, temperature and natural water constituent effects. The results showed that the SCP removal rate constants (k(obs)) followed a quadratic relationship with initial persulfate concentrations (k(obs) =3D -1.526 * 10(-6) [PS](0)(2) + 5.621 * 10(-4) [PS](0) + 0.01158, R-2 =3D 0.923, [PS](0) =3D 17.5-280 mu M) and excellent fitting with the Arrhenius equation (ln (k(obs)) =3D - 19487.9/T + 59.63, R-2 =3D 0.967, T =3D 303.15-323.15 K). The pH tests were applied at a wide range of 3.0-10.0, the quickest degradation rate observed at pH 3.0. The consumption rate of PS was strengthened at elevated temperatures, and 40 degrees C was determined to be an optimal condition. The presence of chloride (Cl-), bicarbonate (HCO3-) and humic acid all showed inhibitory effects. The radical scavenging experiments revealed that HO. and SO4.- were predominant oxidizing species responsible for SCP removal. These oxidizing species were further verified by EPR tests. LC-MS/MS analysis confirmed seven kinds of byproducts during the removal process which are mainly deriving from SO2 extrusion/Smile-type rearrangement and S-N bond cleavage. Efficiencies of the antibiotics removal were over 85% when 50 g L-1 PS was added to piggery anaerobic fermentation slurry. This remediation technology may appear as a promising way for the removal of highly antibiotics-contaminated water in a small scale.
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  • Electrochemical Corrosion Behavior of TC11 Alloy in Sulfate Solution at High Temperature and High Pressure

    Zha, Lei   Li, Heping   Wang, Ning   Lin, Sen   Xu, Liping  

    TC11 alloy is a potential alloy for use in high temperature aggressive water environments. The electrochemistry and corrosion behavior of TC11 alloy is investigated in sodium sulfate solution at high temperature and high pressure using various in situ electrochemical techniques, i.e., open circuit potential (OCP), potentiodynamic polarization (PDP), and electrochemical impedance spectroscopy (EIS) measurements. The effect of sodium sulfate concentration, temperature, and pressure on the electrochemical corrosion behavior of the alloy has been explored. The results indicate that the increase of either concentration or temperature and pressure shift the value of the corrosion potential (Ecorr) for the alloy toward the negative direction, while increasing the values of corrosion current density (i(corr)) and corrosion rate (R-corr). The values of oxide film resistance (R-f) and charge transfer resistance (R-ct) confirm these results. The EIS and polarization results are in good agreement with each other.
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  • Bismuth Oxychloride Nanoplates Prepared by a Single-Source Organometallic Reactant Bismuth Hexafluoroacetylacetonate and Their Excellent Photocatalytic Performance

    Wang, Hao   Wan, Long   Huang, Kai   Bi, Ke   Liang, Ce   Lin, Sen   Xu, Xin   Wang, Wenjun   Liu, Jun   Zhang, Ru   Fan, Dongyu   Wang, Yonggang   Lei, Ming  

    Bismuth oxychloride (BiOCl) is well known for its photocatalytic activity and many methods are reported to prepare this layered-structure material. In this study, bismuth hexafluoroacetylacetonate Bi(C5HF6O2)(3) was chosen as Bi source in the synthesis of BiOCl. Uniform BiOCl nanoplates were fabricated without any organic additive to control the morphology. In the formation process, Bi(C(5)HF(6)O2)(3) acted as both reagent and soft-template agent. Moreover BiOCl nanoplates exhibited quite high photocatalytic activity. Both P25 and BiOCl nanoplates can decompose the whole RhB dye within 30 minutes, which indicates that BiOCl nanoplates are of the comparative photocatalytic performance as P25.
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  • Preparation of electrospun fiber mats using siloxane-containing vaterite and biodegradable polymer hybrids for bone regeneration

    Fujikura, Kie   Lin, Sen   Nakamura, Jin   Obata, Akiko  

    An electrospun fiber mat using a new composite consisting of siloxane-containing vaterite (SiV) and poly(lactic-co-glycolic acid) (PLGA) (denoted by SiPLGVH) was prepared with the aim of applying it as a membrane for use in a guided bone regeneration (GBR) system. Another electrospun fiber mat using a previously described composite consisting of SiV and poly(L-lactic acid) (denoted by SiPVH) was also prepared as a comparative sample. SiPLGVH fiber mats showed superior results in terms of mechanical tensile properties and cellular behavior. Their elongation before failure was about eight times higher than that of SiPVH. The numbers of osteoblast-like cells that proliferated on the SiPLGVH fiber mats, regardless of the hydroxyapatite coating, were comparable to that of SiPVH. The cells spread more, two dimensionally, on the SiPLGVH fiber mats, since the pores between fibers were narrowed down because of swelling of the PLGA matrix during cell culture. This two-dimensional cellular proliferation quality on the SiPLGVH fiber mats is expected to be suitable for materials used in GBR, leading to control of infiltration of the soft tissue and great tissue integration with the surrounding tissue. (c) 2013 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 101B: 1350-1358, 2013.
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