Now showing items 5732-5751 of 14241

    • O-atom transfer reaction from N2O to CO: A theoretical investigation 

      Wang, Yao; Fu, Gang; Zhang, Ying; Xu, Xin; 徐昕; Wan, Huilin; 万惠霖 (ELSEVIER SCIENCE BV, 2009-05)
      The mechanism of the gas-phase reaction N2O + CO -> N-2 + CO2 has been elucidated by means of various density functional methods in conjunction with the ab initio methods. An indirect and step-wise pathway in which CO ...
    • O-Carboxymethyl-chitosan/organosilica hybrid nanoparticles as non-viral vectors for gene delivery 

      Zhang, Ya-fei; Yin, Pei; Zhao, Xue-qin; Wang, Jin; Wang, Jun; Wang, Cai-ding; Ren, Lei; 任磊; Zhang, Qi-qing (ELSEVIER SCIENCE BV, 2009-04)
      Polymeric non-viral vectors, such as chitosan nanoparticles show good biocompatibility, but low transfection efficiency. The objective of this study was to improve the transfection efficiency of chitosan based non-viral ...
    • O-GlcNAcylation modulates the self-aggregation ability of the fourth microtubule-binding repeat of tau 

      Yu, C. H.; Si, T.; Wu, W. H.; Hu, J.; Du, J. T.; Zhao, Y. F.; Li, Y. M.; 赵玉芬 (2008)
      In Alzheimer's disease (AD), tau protein is abnormally hyperphosphorylated and aggregated into paired helical filaments (PHFs). It was discovered recently that tau is also O-GlcNAcylated in human brains. And O-GlcNAcylation ...
    • O-掺杂石墨电极VO~(2+)/VO_2~+电对反应活性研究 

      张焕; 秦琳琳; 施一宁; 郑明森; 董全峰; 田昭武 (2013-04-28)
      采用氧气等离子体处理石墨电极表面,实现氧及含氧官能团的掺杂,以改善VO2+/VO2+电对的反应活性.fT-Ir和EdS测试结果表明,氧气等离子体处理石墨表面引入了含氧官能团,从而提高了VO2+/VO2+电对的电化学活性.在本文实验条件下20 MIn等离子体处理的电极活性最好,8 MA.CM-2电流密度恒流充放电,石墨电极VO2+/VO2+电对库仑效率达到91%,比未处理电极的库仑效率提高了19%.
    • O2和CO在Ni(111)表面的吸附活化 

      段园; 陈明树; 万惠霖 (2018-12-11)
      采用高分辨电子能量损失谱(HREELS)、俄歇电子能谱(AES)和低能电子衍射(LEED)研究镍单晶表面氧物种及CO与O2的共吸附。实验结果表明,Ni(111)表面氧化后存在两种氧物种,位于54me V能量损失峰的表面化学吸附氧物种和位于69 meV能量损失峰的表面氧化镍。首先,随着暴露氧量的增加,表面化学吸附氧物种的能量损失峰蓝移至58 meV;其次,通过真空退火及与CO相互作用考察,发现表面化学吸附氧物种较不稳定。在室温条件下,表面 ...
    • O_2气中激光烧蚀Ta_2O_5产物离子的氧化反应 

      辜振宁; 王雪峰; 秦启宗; 陈宏; 郑兰荪 (1998)
      The mass spectra of both positive and negative charged Ta-containing ions From laser ablatiou of Ta2O5 were measured using a time-of-Flight mass spectrometer.Formation of iomc Ta-containing oxides such as TaO and TaO From ...
    • O_3H_2O_2组合法处理染料中间体废水的研究 

      王莉莉; 杨孙楷 (1994)
      报道了O_3—H_2O_2组合法处理含有磺酸基团的萘系染料中间体废水的试验结果.对COd约为16000Mg/l的某高浓度染料中间体废水,用5.1gO_3/l和2.0gH_2O_2/l进行处理,可达到约60%的COd及色度去除率,并使bOd/COd的比值超过0.3,为后续生化处理创造了条件.
    • Obituary 

      Huang, Benli; 黄本立 (PERGAMON-ELSEVIER SCIENCE LTD, 2008-02)
    • Obituary - Prof. Dr. Zhaolan GAO 

      Huang, BL; 黄本立 (BEIJING UNIV PRESS, 1999)
    • Observation and characterization of intermolecular homonuclear single-quantum coherences in liquid nuclear magnetic resonance 

      Chen, Z; 陈忠; Chen, ZW; Zhong, JH (AMER INST PHYSICS, 2002)
      Intermolecular zero-quantum and double-quantum coherences (iZQCs and iDQCs) are frequently discussed in literature since they may provide novel contrast mechanisms in magnetic resonance imaging and possibilities for ...
    • Observation of inhomogeneous plasmonic field distribution in a nanocavity 

      Chao-Yu Li; 李超禹; Sai Duan; 段赛; Bao-Ying Wen; 温宝英; Song-Bo Li; 李松波; Murugavel Kathiresan; Li-Qiang Xie; 谢立强; Shu Chen; 陈舒; Jason R.Anema; Bing-Wei Mao; 毛秉伟; Yi Luo; 罗毅; Zhong-Qun Tian; 田中群; Jian-Feng Li; 李剑锋 (Springer Nature Limited, 2020-08-10)
      【Abstract】The progress of plasmon-based technologies relies on an understanding of the properties of the enhanced electromagnetic fields generated by the coupling nanostrucutres.Plasmon-enhanced applications include advanced ...
    • Observation of Ring Tubes from Carbon soot 

      Wang, Y. H.; Yu, R. Q.; Huang, R. B.; Cheng, D. D.; Zhan, M. X.; Zheng, L. S.; 黄荣彬 (1995)
      Ring tubes (tori) have been observed from the carbon soot. The sample was prepared in the pure nitrogen atmosphere by arcing the graphite electrodes, which was covered with aluminum film. Based on their TEM images, structural ...
    • Observation of Ring Tubes from Carbon soot 

      Wang, Y. H.; Yu, R. Q.; Huang, R. B.; Cheng, D. D.; Zhan, M. X.; Zheng, L. S.; 郑兰荪 (1995)
      Ring tubes (tori) have been observed from the carbon soot. The sample was prepared in the pure nitrogen atmosphere by arcing the graphite electrodes, which was covered with aluminum film. Based on their TEM images, structural ...
    • Observation of spin-dependent quantum jumps via quantum dot resonance fluorescence 

      赵仪 (2010)
      Reliable preparation, manipulation and measurement protocols are necessary to exploit a physical system as a quantum bit(1). Spins in optically active quantum dots offer one potential realization(2,3) and recent demonstrations ...
    • Observations of the Effect of Confined Space on Fluorescence and Diffusion Properties of Molecules in Single Conical Nanopore Channels 

      Zhang, Li-Xiang; Cao, Xiao-Hong; Cai, Wei-Peng; Li, Yao-Qun; 李耀群 (SPRINGER/PLENUM PUBLISHERS, 2011)
      In this work, we investigated the fluorescence emission spectra and diffusion properties of dye molecules confined in different positions of conical nanopore channels using a laser scanning confocal fluorescence microscope. ...
    • Observing atomic layer electrodeposition on single nanocrystals surface by dark field spectroscopy 

      Shu Hu; 胡树; Jun Yi; 易骏; Yue-Jiao Zhang; 张月皎; Kai-Qiang Lin; Bi-Ju Liu; Liang Chen; Chao Zhan; Zhi-Chao Lei; Juan-Juan Sun; Cheng Zong; Jian-Feng Li; 李剑锋; Bin Ren; 任斌 (Springer Nature Limited, 2020-05-20)
      Underpotential deposition offers a predominant way to tailor the electronic structure of the catalytic surface at the atomic level, which is key to engineering materials with a high activity for (electro)catalysis. However, ...
    • Octadecyltrimethoxysilane functionalized ZnO nanorods as a novel coating for solid-phase microextraction with strong hydrophobic surface 

      Zeng, Jingbin; Liu, Haihong; Chen, Jinmei; Huang, Jianli; Yu, Jianfeng; Wang, Yiru; Chen, Xi; 王翊如; 陈曦 (2012)
      In this paper, we have, for the first time, proposed an approach by combining self-assembled monolayers (SAMs) and nanomaterials (NMs) for the preparation of novel solid-phase microextraction (SPME) coatings. The self-assembly ...
    • Octyl-type monolithic columns of 530 mu m i.d. for capillary liquid chromatography 

      Xiaojia Huang; Qiuquan Wang; 王秋泉; Hua Yan; Ying Huang; Benli Huang; 黄本立 (ELSEVIER SCIENCE BV, 2004-12)
      A novel monolithic capillary column (530 mum i.d.) was prepared for capillary liquid chromatography (CLC) by in situ copolymerization of octyl methacrylate (MAOE) and ethylene dimethacrylate (EDMA) in the presence of a ...
    • Odd-even Effect on Liquid Crystalline Behavior for C-3-Cyclotriveratrylene(CTV) Derivatives Containing Alkoxies with Different Lengths as Peripheral Groups 

      Chen, Dan-mei; Dong, Yan-ming; 董炎明; Shen, Bing-xing; Yang, Xue-hui; Li, Yan-jie; Hu, Xiao-lan (HIGHER EDUCATION PRESS, 2009)
      A series of bowlic cyclotriveratrylenes(CTV) with peripheral groups with different lengths were synthesized. These compounds were investigated by diferential scanning calorimetry and hot stage coupled polarizing microscopy. ...
    • Off/On Fluorescent Chemosensors for Organotin Halides Based on Binuclear Ruthenium Complexes 

      Niu, Yufen; Han, Feifei; Zhang, Qian; Xie, Tingwan; Lu, Liu; Li, Shunhua; Xia, Haiping; 李顺华; 夏海平 (WILEY-V C H VERLAG GMBH, 2013)