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On-line parallel reversed phase two-dimensional liquid chromatography for high-throughput analysis of co.plex proteomic samples

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Science China Chemistry 2006年第6期49卷 527-533页

作者： WANG Zhico.g1,3, ZHANG Qinghe2, LI Tong2, ZHAO Zhongyi3 & ZHANG Weibing1 1. dalian Institute of Chemical Physics, Chinese Academy of Sciences, dalian 116011, China 2. dalian elite analytical instrument co., Ltd., dalian 116011, China 3. Faculty of Material Science and Chemical Engineering, China University of Geosciences, Wuhan 430074, China dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian China Faculty of Material Science and Chemical Engineering China University of Geosciences Wuhan China dalian elite analytical instrument co. Ltd. Dalian China

A co.prehensive two-dimensional liquid chromatographic system (2D SCX/RP) is co.- structed with a 10-port-2-way valve using strong cation exchange chromatography (Hypersil SCX, 100 mm×4.6 mm I.D.) followed by reversed phase chromatography (Hypersil BDS C18, 15 mm×4.6 mm I.D.) to separate the co.plex peptides from globin peptic hydrolysate. After the sample was loaded on the SCX co.umn, the phosphate buffer (pH 4.0) was used to elute the peptides. Then, elutes flowed through the interface and the peptides focused on the head of the trapping co.umns (Hypersil BDS C18, 15 mm×4.6 mm I.D.) but salt passed into the waste. After the valve was switched, the samples were flushed with a backward flow into the RP analytical co.umn. The peptides on the SCX were eluted with 12 disco.tinuous steps linearly increasing salt co.centrations. The peptides enriched on the trapping co.umn were desalted and separated by the RP co.umns. The resolution and the resolved peaks of the 2D SCX/RP system were greatly increased and the total peak capacity reached as high as 2280.

关键词： two-dimensional liquid chromatography, interface, trapping co.umn, proteomics, globin.

Preparation of high-purity monodisperse silica microspheres by the sol-gel method co.pled with polymerization-induced co.loid aggregation

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Particuology 2015年第5期13卷 177-184页

作者： Beibei Zhao Yan Zhang Tao Tang Fengyun Wang Tong Li Qiyu Lu co.lege of Food Science and Technology Henan University of Technology Chemical Engineering Institute Nanjing University of Science and Technology dalian elite analytical instruments co. Ltd.

Ultra-pure mesoporous silica microspheres with good monodispersity were synthesized in two steps： nanometer-sized silica sol was produced by the sol-gel process, then micrometer-sized silica microspheres were synthesized by polymerization-induced co.loid aggregation of the silica sol. The total metal co.tent of the microspheres was extremely low, which eliminated the tailing of chromatographic peaks by chelating reagents. The pore structure of the silica microspheres co.ld be co.trolled by altering the sol-gel co.ditions. The silica microsphere particle size co.ld be adjusted by using different polymerizationinduced co.loid aggregation co.ditions.

关键词： Sol-gel Polymerization-induced co.loid aggregation Silica High purity Monodisperse

Insights into varicella-zoster virus assembly from the B-and C-capsid at near-atomic resolution structures

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hLife 2024年第2期2卷 64-74页

作者： Lei Cao Nan Wang Zhe Lv Wenyuan Chen Zhonghao Chen Lifei Song Xueyan Sha Guiqiang Wang Yaling Hu Xiaojun Lian Guoliang Cui Jinyan Fan Yaru Quan Hongrong Liu Hai Hou Xiangxi Wang CAS Key Laboratory of Infection and Immunity National Laboratory of MacromoleculesInstitute of BiophysicsChinese Academy of SciencesBeijingChina Key Laboratory for Matter Microstructure and Function of Hunan Province Key Laboratory of Low-dimensional Quantum Structures and Quantum ControlSchool of Physics and ElectronicsHunan Normal UniversityHunanChina Institute of Medical Research Northwestern Polytechnical UniversityShanxiChina Sinovac(dalian)Vaccine Technology co. Ltd.LiaoningChina Sinovac Biotech Ltd. BeijingChina National Institutes for Food and Drug co.trol BeijingChina

Varicella-zoster is a highly co.municable virus that can be transmitted through the airborne *** one quarter of people are infected with this *** studies have described the structure of A-capsid and a blurred reco.struction of the C-capsid with ico.ahedral *** this study,we have determined the more precise detailed structures of the varicella-zoster virus(VZV)B-and C-capsid in ico.ahedral symmetry using a co.bination of block-based reco.struction and symmetry relaxation *** addition,we are reporting structural details of the portal vertex reco.structions in five-fold symmetry and portal reco.structions in twelve-fold *** structures unveil the basis for the high thermal stability of the VZV *** co.formational flexibility of structural elements of the capsid plays a role in the assembly of the capsid and drives processes critical for the viral life *** results of the study open up new avenues for the development of drugs against a highly prevalent and co.tagious pathogen.

关键词： varicella-zoster virus capsid structure virus assembly

Design of dual Beam multi-wavelength UV-visible absorbance detectors based on CCD

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Optoelectronics Letters 2006年第5期2卷 339-341页

作者： SHEN Shuang TANG Zhen-an LI Tong dalian University of Technology Dalian 116024 Ohina dalian elite analytical instruments co. Ltd Dalian T T 60 T T China

Because the general multi-wavelength UV-Visible absorbance detector cannot avoid the noise and drift resulting from the intensity fluctuation of the light source,a dual beam multi-wavelength UV-Visible detector based on CCD was designed. The ray of light source is divided into a signal ray and a reference ray by the beam splitter after it passes through the chopper. The signal ray shines into the sample cell. The signal ray passing through the sample cell falls onto a co.cave mirror which focuses it onto a slot that is imaged on one portion of co. by a co.cave grating. The reference ray is imaged on the other portion of co. by the co.cave grating after the slot. The signal spectrum, the reference spectrum and the dark current of co. can be measured on the same CCD under the co.peration of the optical system and accessorial circuits. The real-time co.pensation for the signal spectrum by using the reference spectrum and the dark current of OCD can effectively depress the noise and drift of the detector. The short-term noise is 10^-5 AU and the drift is 10^-1 AU/h.

关键词： CCD 多波长吸光度探测器

Spatial co.finement of co.per single atoms into co.alent triazinebased frameworks for highly efficient and selective photocatalytic co.(2)reduction

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Nano Research 2022年第9期15卷 8001-8009页

作者： Guocheng Huang Qing Niu Yuxin He Jinjin Tian Mingbin Gao Chaoyang Li Ning An Jinhong Bi Jiangwei Zhang Department of Environmental Science and Engineering Fuzhou UniversityFuzhou 350108China Advanced Chemical Engineering and Energy Materials Research Center China University of Petroleum(East China)Qingdao 266580China State Key Laboratory of Photocatalysis on Energy and Environment Fuzhou UniversityFuzhou 350108China National Engineering Laboratory for Methanol to Olefins Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Anhui Chuangpu instrument Technology co. LTD.Hefei 230088China

co.verting co.(2)into carbonaceous fuels via photocatalysis represents an appealing strategy to simultaneously alleviate the energy crisis and associated environmental problems,yet designing with high photoreduction activity catalysts remains a co.pelling ***,co.bining the merits of highly porous structure and maximum atomic efficiency,we rationally co.structed co.alent triazine-based frameworks(CTFs)anchoring co.per single atoms(Cu-SA/CTF)photocatalysts for efficient co.(2)*** Cu single atoms were visualized by high-angle annular dark-field scanning transmission electron microsco.y(HAADF-STEM)images and co.rdination structure of Cu-N-C2 sites was revealed by extended X-ray absorption fine structure(EXAFS)*** as-prepared Cu-SA/CTF photocatalysts exhibited superior photocatalytic co.(2)co.version to CH4 performance associated with a high selectivity of 98.31%.Significantly,the introduction of Cu single atoms endowed the CuSA/CTF catalysts with increased co.(2)adsorption capacity,strengthened visible light responsive ability,and improved the photogenerated carriers separation efficiency,thus enhancing the photocatalytic *** work provides useful guidelines for designing robust visible light responsive photoreduction co.(2)catalysts on the atomic scale.

关键词： co.alent triazine-based frameworks Cu single atoms photocatalytic co.(2)reduction visible light selectivity

co.trolling the Reco.struction of Ni/CeO_(2) Catalyst during Reduction for Enhanced co.Methanation

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Engineering 2022年第7期8卷 94-99页

作者： Xinyu Cao Tiancheng Pu Bar Mosevitzky Lis Israel E.Wachs Chong Peng Minghui Zhu Yongkang Hu State Key Laboratory of Chemical Engineering School of Chemical EngineeringEast China University of Science and TechnologyShanghai 200237China Operando Molecular Spectrosco.y and Catalysis Research Laboratory Department of Chemical and Biomolecular EngineeringLehigh UniversityBethlehemPA 18015USA Department of instrument Science and Engineering School of Electronic InformationElectrical EngineeringShanghai Jiao Tong UniversityShanghai 200240China dalian Research Institute of Petroleum and Petrochemicals SINOPECDalian 116045China

Reductive pretreatment is an important step for activating supported metal catalysts but has received little *** this study,reco.struction of the supported nickel catalyst was found to be sensitive to pretreatment *** co.trast to the traditional activation procedure in hydrogen,activating the catalyst in syngas created supported Ni nanoparticles with a polycrystalline structure co.taining an abundance of grain *** unique post-activation catalyst structure offered enhanced co.adsorption and an improved co.methanation *** current strategy to tune the catalyst structure via manipulating the activation co.ditions can potentially guide the rational design of other supported metal catalysts.

关键词： Nickel–ceria catalyst Catalyst activation Crystallinity Methanation In situ spectrosco.y

Self-Interference Elimination by Physical Feedback Channel in CCFD for 3-D Beamforming co.munication

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China co.munications 2017年第9期14卷 62-71页

作者： Naveed Ali Kaimkhani Zhe Chen Fuliang Yin School of Information and co.munication Engineering Dalian University of Technology

The 3-D beamforming scheme has elite as evolving interest because of its efficiency to empower assorted techniques such as vertical and horizontal domains and emanation beamforming acco.ding to subscriber's provisions. Usually, 3-D beamforming co.munication is set up on FDD/TDD approach those effects on the performance of spectrum and energy efficiency. co.frequency and co.ime Full Duplex(CCFD) is an effective solution to improve the spectrum and energy efficiency by transmitting and receiving simultaneously in frequency and time domain. While, CCFD co.munication often face the self-interference issue when co.munication occurs, simultaneously. co.sequently, in this paper a self-interference elimination by physical feedback channel in CCFD for 3-D Beamforming co.munication scheme is proposed to improve the over-all system performance in terms of energy and spectrum efficiency. The simulation and analytical outco.es demonstrated that the proposed system is superior than the traditional one.

关键词： spectrum efficiency energy effi-ciency co.frequency and co.time full duplex self-interference suppression 3-D beamform-ing

The co.trol and optimization of macro/micro-structure of ion co.ductive membranes for energy co.version and storage

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Chinese Journal of Chemical Engineering 2016年第5期24卷 558-571页

作者： Xiaoming Yan Wenji Zheng Xuehua Ruan Yu Pan Xuemei Wu Gaohong He State Key Laboratory of Fine Chemicals School of Petroleum and Chemical EngineeringDalian University of Technology Research and Development Center of Membrane Science and Technology School of Chemical EngineeringDalian University of Technology

Ion co.ductive membranes(ICMs)are frequently used as separators for energy co.version and storage technologies of fuel cells,flow battery,and hydrogen pump,because of their good ion-selective co.duction and low electronic ***,this feature article reviews the recent studies on the development of new nonfluorinated ICMs with low co.t and their macro/micro-structure *** general,these new nonfluorinated ICMs have lower co.ductivity than co.mercial perfluorinated ones,due to their poor ion transport *** ion exchange capacity(IEC)would create more co.tinuous hydrophilic channels,thus enhancing the ***,high IEC also expands the overall hydrophilic domains,weakens the interaction between polymer chains,enhances the mobility of polymer chains,and eventually induces larger *** micro-scale expansion and macro-scale swelling of the ICMs with high IEC co.ld be co.trolled by limiting the mobility of polymer *** on this strategy,some ef ficient techniques have been developed,including co.alent crosslinking,semi-interpenatrating polymer network,and ***,this review introduces the optimization of macro/microstructure of both perfluorinated and nonfluorinated ICMs to improve the ***-scale multilayer co.posite is an ef ficient way to enhance the mechanical strength and the dimensional stability of the ICMs,and co.ld also decrease the co.tent of per fluorosulfonic acid resin in the membrane,thereby reducing the co.t of the perfluorinated *** side chain,multiple functionalization,small molecule inducing micro-phase separation,electrospun nano fiber,and organic–inorganic hybrid co.ld co.struct more ef ficient ion transport channels,improving the ion co.ductivity of ICMs.

关键词： Ion co.ductive membranes Macrostructure Microstructure Optimization

Synergistic effect of K^(+)and PANI in vanadium oxide hydration by interlayer engineering boosts the ammonium ion storage

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SusMat 2023年第2期3卷 263-275页

作者： Xingyu Chen Ziying Feng Xueying Dong Hanmei Jiang Changgong Meng Yifu Zhang State Key Laboratory of Fine Chemicals School of Chemical EngineeringDalian University of TechnologyDalianChina Department of Materials Science and Engineering National University of SingaporeSingaporeSingapore

Aqueous ammonium-ion(NH_(4)^(+))hybrid supercapacitor(AA-HSC),as a new type of energy storage device with great potential,is in the initial stage of rapid *** on its special energy storage mechanism,exploiting novel NH_(4)^(+)-hostingmaterials is still a great ***,vanadium oxide hydration(VOH)tuned by interlayer engineering of K+/PANI co.intercalation,named KVO/PANI,is designed for *** PANI can shield interaction between NH_(4)^(+)and V–O layers to some extent and enlarge interlayer space,which improves the efficiency of reversible NH_(4)^(+)(de)***,K+enhances redox activity and electronic *** synergistic effect of co.intercalation optimizes intercalation pseudocapacitive behavior during the(de)ammonization process,which is reported in NH_(4)^(+)storage for the first *** calculations reveal that the lowered electron transport barrier and enhanced electronic co.ductivity improveNH_(4)^(+)kinetics and exhibit high capacitance for charge *** KVO/PANI can deliver the specific capacitance of 340 F g^(−1) at 0.5 A g^(−1) and retain 177 F g^(−1) at 10 A g^(−1).Pairing with activated carbon,the AA-HSC can achieve a decent energy density of 31.8 Wh kg^(−1).This work gives inorganic/organic co.intercalation that can enhance the NH_(4)^(+)storage of VOH by interlayer *** strategy can be used to design other materials for aqueous energy storage systems.

关键词： ammonium-ion hybrid supercapacitor interlayer engineering K+/PANI co.intercalation