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高分子材料科学与工程 2003年第2期19卷 6-10页

作者：游秀东向安高建平于九皋 Mario Gauthier 天津大学化学系天津300072 Dept.of Chem.Uni.Of Waterloo

综述了树形聚合物的最新研究进展 ,重点介绍了近年来树形聚合物功能化结构设计及其在光、电信息及生物技术等新领域中的应用研究、发展趋势和应用前景。

关键词：树形聚合物功能化结构设计研究进展光开头发色基团光获体系生物探针

Channel selection against electrode shift enables robust myoelectric control without retraining

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Science China(Technological Sciences) 2021年第8期64卷 1653-1662页

作者： LV Bo HE JiaYuan SHENG XinJun DING Han ZHU XiangYang State Key Laboratory of Mechanical System and Vibration School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai200240China Department of Systems Design Engineering Faculty of EngineeringUniversity of WaterlooWaterlooN2L 3G1Canada

Myoelectric controlled interfaces driven by muscle activities have achieved good performance in ideal conditions and showed many potential medical-related and industrial applications.However,in practical applications,the performance could be drastically degraded due to the electrode(sensor)shift,which is inevitable in donning and doffing the system.In this study,we presented a novel channel selection method against electrode shift for robust pattern-recognition based myoelectric control.The proposed method was evaluated on twenty-four subjects,including twenty-two able-bodied subjects and two amputees,and compared with two traditional channel selection methods,i.e.,uniform selection(uni)and sequential feature selection(SFS).We demonstrated that the offline error rates of the proposed method were significantly lower than those of the other two methods(P<0.05),and its online performance in shift conditions was comparable to that in ideal conditions.These outcomes benefit the practical applications of robust myoelectric controlled interfaces.

关键词： myoelectric control high-density electrodes channel selection electrode shift surface electromyography

BEHAVIOUR OF INHIBITORS IN EMULSION POLYMERIZATION(Ⅱ)CaseⅠKinetics

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Chinese Journal of chemical Engineering 1991年第1期 21-27页

作者： A.Penlidis 霍炳培 MIPPT McMaster Univ.Canada Dept.of Chem.Eng.Univ.of WaterlooOnt.Canada N2L 3G1 chem.Ind.Res.Inst.of Guangzhou GuangzhouGuangdong

The behaviour of water soluble and monomer soluble inhibitors in the emulsion polymerization for CaseI system(e.***.vinyl acetate and vinyl chloride)has been studied.The behaviour of monomer soluble inhibitorsis shown to be quite different from that observed in Case Ⅱ emulsion polymerization system.Model predictionsof the effect of these inhibitors on polymer particle nucleation and growth rate are shown to be in satisfactoryagreement with experimental results.

关键词： monomer polymerization vinyl emulsion acetate Case Kinetics nucleation behaviour timer

Electrocatalysis of Puerarin on a Nano-CeO2/MWCNTs Composite Modified Electrode and Its Determination in Pharmaceutical Preparations

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Chinese Journal of chemistry 2011年第5期29卷 1017-1023页

作者：吉玉兰王广凤张翠红方宾 College of chemistry and Materials Science and Anhui Key Laboratory of chem-Biosensing Anhui Normal Uni- versity Wuhu Anhui 241000 China Department of Pharmacy Anhui College of Chinese Traditional Medicine Wuhu Anhui 241000 China

A good route for the fabrication of CeO2 nanoparticles （nano-CeO2）/multi-walled carbon nanotubes （MWCNTs） modified glassy carbon electrodes （GCE） was proposed. MWCNTs are used to immobilize nano-CeO2. What＇s more, with the addition of the MWCNTs, the agglomeration level of CeO2 nanoparticles can be reduced, the extremely large surface area can be obtained and the electron transfer rate can be increased. The morphological char- acterization of nano-CeOz/MWCNTs was examined by scanning electron microscopy （SEM）. The performances of the nano-CeO2/MWCNTs/GCE were characterized with cyclic voltammetry （CV）, electrochemical impedance spectroscopy （EIS） and typical amperometric response （i-t）. The potential utility of the constructed electrodes was demonstrated by applying them to the analytical determination of puerarin concentration. The catalytic oxidation of puerarin has a better result on nano-CeOz/MWCNTs/GCE because of the synergistic effect of nano-CeO2 and MWCNTs. An optimized limit of detection of 8.0 × 10^-9 mol/L was obtained at a signal-to-noise ratio of 3 and with a fast response time （within 3 s）. Additionally, the nano-CeO2/MWCNTs/GCE exhibited a wide linear range from 0.04 to 6.0 μmol/L and high sensitivity.

关键词： puerarin CeO2 multi-walled carbon nanotubes electrochemistry trace analysis

甾体甲基化转移酶的研究——有关甾体衍生物的合成

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华西药学杂志 2000年第5期15卷 331-334页

作者：何菱周文 David Nes W. 尹红梅华西医科大学药学院四川成都610041 dept.chem.Biochem Texas Tech.Uni.

目的 :研究甾体甲基化转移酶。方法 :从γ oryzanol提取的cycloartenol和 2 4(2 8) methylenecycloartenol为初始原料合成目标化合物。结果 :成功地合成了 11个甾体衍生物。结论 :目标化合物均经HPLC纯化 ;结构均经NMR和GC/MS确证 ,方... 详细信息

目的 :研究甾体甲基化转移酶。方法 :从γ oryzanol提取的cycloartenol和 2 4(2 8) methylenecycloartenol为初始原料合成目标化合物。结果 :成功地合成了 11个甾体衍生物。结论 :目标化合物均经HPLC纯化 ;结构均经NMR和GC/MS确证 ,方法简便易行。

关键词：甾体甲基转移酶甾体生物合成抑制剂合成

ENZYMATICALLY　SOLVENT－FREE　SYNTHESIS　OF　SUGAR　ESTER　CONTAINING　ω－3　POLYUNSATURATED　FATTY　ACID

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Chinese chemical Letters 1996年第7期7卷 611-614页

作者： Zu Yi Li Owen P. Ward(1.Shanghai Institute of Organic chemistry Academia Sinica Shanghai,200032)(2.Department of Biology,university of waterloo,waterloo,Ontario N2L3GI,Canada) Shanghai Inst. Organ. chem. Acad. S. Shanghai 200032 Department of Biology University of Waterloo Waterloo Ont. N2L3GI Canada

A enzymatic synthesis of sugar ester from isopropylidenesugar and ω-3polyunsaturated fatty acid was studied.Esterification with Lipase N-435 gave the bestresult.

关键词： ACID FATTY ENZYMATICALLY CONTAINING

Regulating ethane and ethylene synthesis by proton corridor microenvironment for CO_(2) electrolysis

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Journal of Energy chemistry 2023年第12期87卷 368-377,I0010页

作者： Xiaowen Zhang Bohua Ren Hao Li Shuxuan Liu Haoyang Xiong Silong Dong Yifan Li Dan Luo Yi Cui Guobin Wen Xin Wang South China Academy of Advanced Optoelectronics International Academy of Optoelectronics at ZhaoqingSouth China Normal UniversityGuangzhou 510006GuangdongChina Department of chemical Engineering Waterloo Institute for NanotechnologyUniversity of Waterloo200 University Avenue WestWaterlooOntario N2L 3G1Canada School of Nano Technology and Nano Bionics University of Science and Technology of ChinaHefei 230026AnhuiChina i-lab Nano-X Vacuum Interconnected WorkstationSuzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123JiangsuChina State Key Laboratory of chem/Bio-Sensing and chemometrics Provincial Hunan Key Laboratory for Graphene Materials and DevicesCollege of Chemistry and Chemical EngineeringNational Supercomputer Centers in ChangshaHunan UniversityChangsha 410082HunanChina

Electrocatalytic reduction of carbon dioxide is one of the most effective strategies to achieve carbon neutrality and energy sustainability.Although high-value multi-carbon products have been widely studied,limited electrocatalysts have been reported for the selective conversion of ethane.More importantly,the factors tuning the selectivity between ethane and ethylene have not been clarified.Here,Zn@Cu nanowire arrays(Zn@Cu-NWAs) catalyst is proposed to stimulate the maintenance of efficient CO_(2)-to-C_(2)H_(6) conversion at high current densities.Meanwhile,in order to investigate the factors affecting the interconversion between ethane and ethylene,the counterpart catalyst that facilitates C–C coupling to ethylene was also synthesized.Time-of-flight secondary-ion mass spectroscopy(TOF-SIMS),in-situ Raman spectroscopy,and simulation results show that Zn@Cu-NWAs can provide a localized proton corridor environment for the formation of ethane,accelerating the further proton-coupled CO_(2) reduction reaction(CO_(2)RR)kinetics.Hence,this catalyst delivered an ethane Faraday efficiency of over 65% at-1.14 V vs.RHE with a total current density of 142.3 mA/cm^(2).This work provides a new perspective on regulating the local microenvironment to modify the selectivity of multi-carbon products.

关键词： Proton microenvironment CO_(2)reduction C2+product Selective conversion Cu-Zn materials

High-density/efficient surface active sites on modified separators to boost Li-S batteries via atomic Co^(3+)-Se termination

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Nano Research 2022年第8期15卷 7199-7208页

作者： Shujie Liu Xiaofei Liu Manfang Chen Dong Wang Xin Ge Wei Zhang Xiyang Wang Chunhui Wang Tingting Qin Haozhe Qin Liang Qiao Dan Zhang Xing Ou Weitao Zheng Key Laboratory of Automobile Materials of MOE School of Materials Science and Engineeringand Electron Microscopy Centerand International Center of Future ScienceJilin UniversityChangchun 130013China Key Laboratory of Materials Design and Quantum Simulation College of ScienceChangchun UniversityChangchun 130022China National Base for International Science&Technology Cooperation School of ChemistryXiangtan UniversityXiangtan 411105China State Key Laboratory of chem/Bio-Sensing and chemometrics Advanced Catalytic Engineering Research Center of the Ministry of EducationCollege of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China Department of Mechanical and Mechatronics Engineering University of WaterlooWaterlooN2L 3G1Canada School of Metallurgy and Environment Central South UniversityChangsha 410083China

Various and critical electrocatalytic processes are involved during the redox reactions in the Li-S batteries,which extremely depend on the surface structure and chemical state.Recently,single-atom concept unlocks a route to maximize the use of surface-active atoms,however,further increasing the density of active site is still strictly limited by the inherent structure that single-atoms are only highly-dispersed on substrate.Herein,we provide a viewpoint that an elaborate facet design with singlecrystalline structure engineering can harvest high-density surface active sites,which can significantly boost the electrocatalyst performance for excellent Li-S batteries.Specifically,the single-crystal CoSe_(2)(scCS)exhibits three-types of terminated(011)facet,efficiently obtaining the surface with a high-rich Co^(3+)–Se bond termination,in contrast with lots of surface grain boundaries and dangling bonds in polycrystalline CoSe_(2).Surprisingly,the surface active sites concentration can reach more than 69%.As anticipated,it can provide high-density and high-efficient active sites,enormously suppressing the shuttle effect and improving the reaction kinetics via accelerating the conversion and deposition of polysulfides and Li2S.This surface lattice strategy with element terminated mode is a promising approach for designing electrocatalyst effect-based energy system,not merely for Li-S batteries.

关键词： high-density surface active sites Co^(3+)-Se covalent bond atomic element terminated Li-S batteries single-crystalline strategy

Switching Optimally Balanced Fe-N Interaction Enables Extremely Stable Energy Storage

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Energy & Environmental Materials 2023年第2期6卷 275-283页

作者： Zhenzhen Zhao Wei Zhang Miao Liu Dong Wang Xiyang Wang Lirong Zheng Xu Zou Zizhun Wang Dabing Li Keke Huang Weitao Zheng Key Laboratory of Mobile Materials MOE and School of Materials Science&Engineeringand Electron Microscopy Centerand International Center of Future ScienceJilin UniversityChangchun 130012China State Key Laboratory of chem/Bio-Sensing and chemometrics Provincial Hunan Key Laboratory for Graphene Materials and DevicesCollege of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China Department of Mechanical and Mechatronics Engineering University of WaterlooWaterloo Canada Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China State Key Laboratory of Luminescence and Applications Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of SciencesChangchun 130033China State Key Laboratory of Inorganic Synthesis and Preparative chemistry College of ChemistryJilin UniversityChangchun 130012China

The interaction between electrode materials and charge carriers is one of the central issues dominating underlying energy storage mechanisms.To address the notoriously significant volume changes accompanying intercalation or formation of alloy/compounds,we aim to introduce and utilize a weak,reversible Fe-N interaction during the(de)intercalation of ammonium ions(NH_(4)^(+))within iron(Ⅲ)hexacyanoferrate(FeHCF),inspired by manipulating the electrostatic adsorption between N and Fe in the early stages of ammonia synthesis(Bosch-Harber Process,chemical Engineering)and steel nitriding processes(Metal Industry).Such strategy of switching well-balanced Fe-N interaction is confirmed in between the nitrogen of ammonium ions and highspin Fe in FeHCF,as observed by using X-ray absorption spectroscopy.The resulting material provided an extremely stable energy storage(58 mAh g^(-1) after 10000 cycles at current density of 1 A g^(-1))as well as high-rate performance(23.6 mAh g^(-1) at current density of 10 A g^(-1)).

关键词： ammonium ion battery Iron(Ⅲ)hexacyanoferrate reversible Fe-N interaction stability

BEHAVIOUR OF INHIBITORS IN EMULSION POLYMERIZATION(Ⅰ)CaseⅡKinetics

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Chinese Journal of chemical Engineering 1991年第1期 12-20页

作者：霍炳培 A.Penlidis chem.Ind.Res.Inst.of Guangzhou GuangzhouGuangdong MIPPT McMaster Univ.Canada Department of Chemical EngineeringUniversity of WaterlooWaterlooOntarioCanada N2L 3G1

The behaviour of water soluble and monomer soluble inhibitors in emulsion polymerization of monomersfollowing Case Ⅱ kinetics(e.***.styrene)has been investigated.Experimental studies reveal that inhibitors canhave an appreciable effect on both polymer particle nucleation and growth.A mathematical model showingthese effects has been developed and simulation studies have been done.The simulation results imply that theconsequences of these effects of monomer soluble inhibitors for industrial emulsion polymerization may be quiteserious.

关键词： polymerization monomer emulsion styrene initiator Case Kinetics latex kinetics nucleation