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Ch.racterization of Tars from th. Th.rmal Processing of Baganuur and Tavan Tolgoi Coals from Mongolia, Using SEC, UV-F, IR and Mass Spectrometry

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Advances in Ch.mical Engineering and Science 2013年第2期3卷 130-144页

作者： Barnasan Purevsuren Yadamsuren Davaajav Sanjaa Batbilig Jargalsaikh.n Namkh.inorov Fatma Karaca Trevor J. Morgan Patricia Alvarez Rodriguez feng h. tay Sergei Kazarian Alan A. h.rod Rafael Kandiyoti Institute of Ch.mistry and Ch.mical Tech.ology Mongolian Academy of Sciences Ulaanbaatar Mongolia

Tars from two Mongolian coals (Tavan Tolgoi and Baganuur) produced by simple distillation h.ve been ch.racterized using size exclusion ch.omatograph. (SEC) with.elution in both.1-meth.l-2-pyrrolidinone (NMP) and a mixed solvent (NMP and ch.oroform), UV-fluorescence in ch.oroform and NMP, gas ch.omatograph. (GC), mass spectrometry (GC-MS, probe-MS and LD-MS with.th.n layer ch.omatograph.) and infra-red spectroscopy. Th. SEC ch.omatograms using NMP and th. solvent mixture NMP: ch.oroform indicates th.t similar conclusions can be drawn from using eith.r eluent. Th. synch.onous UV-fluorescence spectra were sh.fted to longer wavelength. in ch.oroform solution th.n in NMP and ch.oroform may be th. better solvent for th.se tars prepared with.ut extensive secondary th.rmal treatment. Infra-red spectra indicated differences between th. two coal tars th.t reflected th.ir different ranks, with.more oxygenate groups in th. lower rank Baganuur coal. Mass spectrometry (GC-MS and probe-MS) of both.coal tars confirmed th. presence of aliph.tic components as well as aromatics and th. relatively extensive alkylation of aromatics. Molecular mass ranges indicated for Baganuur tar by SEC compared well with.th. mass range by LD-MS alth.ugh.th. LD-MS extended to h.gh.r mass values. Th. h.gh.mass fractions of th. tars were revealed by fractionation by th.n layer ch.omatograph. with.th. relevant sections of th. developed plates inserted directly into th. mass spectrometer;laser desorption was directly from th. surface of th. plate. LD-MS of th. unfractionated samples failed to detect th. h.gh.mass components because of mass discrimination effects. Th. h.gh.mass components were carried over in th. distillation by mass transfer of vapours into th. condenser.

关键词： Mongolian Coals Tar Preparation Ch.racterization Laser Desorption Mass Spectrometry Th.n Layer Ch.omatograph.

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Universal design of th.ee-dimensional porous graph.ne-iron based promotors for kinetically rationalized lith.um-sulfur ch.mistry

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Journal of Energy Ch.mistry 2025年第1期100卷 192-200页

作者： h.a Gao Yunfeng Zh.ng Menglei Wang Ruoxuan Yang Sh.ai feng Xuan Cao Yaping Zh.ng Zh.ngyuan Lu Yingze Song State Key Laboratory of Environment-Friendly Energy Materials School of Materials and Chemistry Southwest University of Science and Technology Sch.ol of Material Science and Engineering Henan University of Technology College of Ch.mistry and Ch.mical Engineering Taishan University

Lith.um-sulfur （Li-S） batteries are widely deemed to be one of th. most potential candidates for future secondary batteries because of th.ir remarkable energy ***,notorious polysulfide sh.ttling and retarded sulfur reaction kinetics pose significant obstacles to th. furth.r application of Li-S *** rationally designed h.gh.y active electrocatalysts can facilitate polysulfide conversion,th. universal and scalable synth.sis strategies need to be ***,a universal synth.tic strategy to construct a series of th.ee-dimensional （3D） porous graph.ne-iron （3DGr-Fe） based electrocatalysts involving 3DGr-FeP,3DGr-Fe3C,and 3DGr-Fe3Se4is exploited for manipulating th. Li-S redox *** h.s been observed th.t th. implementation of a 3D porous Gr arch.tecture leads to th. well-designed conductive networks,wh.le th. uniformly dispersed iron nanoparticles introduce an abundance of active sites,fostering th. lith.um polysulfide conversion,th.reby bolstering th. overall electroch.mical *** Li-S battery with.th. 3DGr-Fe based electrocatalyst exh.bits remarkable capacity retention of 94.8%upon 100 times at 0.2 ***,th. soft-packaged Li-S pouch.cell based on such.a 3DGr-Fe electrocatalyst delivers superior capacity of 1060.71 mA h.g-1and guarantees for th. continuous 30 min work of fan *** investigation gives compreh.nsive insigh.s into th. design,synth.sis,and mech.nism of 3DGr-Fe based electrocatalysts with.h.gh.activity toward efficient and durable Li-S batteries.

关键词： Redox reactions

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Exploration of Gas‑Dependent Self‑Adaptive Reconstruction Beh.vior of Cu_(2)O for Electroch.mical CO_(2)Conversion to Multi‑Carbon Products

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Nano-Micro Letters 2025年第3期17卷 280-296页

作者： Ch.oran Zh.ng Yich.an Gu Qu Jiang Ziyang Sh.ng Ruoh.n feng Sih.ng Wang h.oyue Zh.ng Qianqing Xu Zijian Yuan Fang Song State Key Laboratory of Metal Matrix Composites School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China

Structural reconstruction of electrocatalysts plays a pivotal role in catalytic performances for CO_(2)reduction reaction(CO_(2)RR),wh.reas th. beh.vior is by far superficially ***,we report th.t CO_(2)accessibility results in a universal self-adaptive structural reconstruction from Cu_(2)O to Cu@CuxO composites,ending with.feeding gas-dependent microstructures and catalytic *** CO_(2)-rich.atmosph.re favors reconstruction for CO_(2)RR,wh.reas th. CO_(2)-deficient one prefers th.t for h.drogen evolution *** th. assistance of spectroscopic analysis and th.oretical calculations,we uncover a CO_(2)-induced passivation beh.vior by identifying a reductionresistant but catalytic active Cu(I)-rich.amorph.us layer stabilized by*CO ***,we find extra CO production is indispensable for th. robust production of *** inverse correlation between durability and FECO/FEC2h. is disclosed,suggesting th.t th. selfstabilization process involving th. absorption of*CO intermediates on Cu(I)sites is essential for durable *** by th.s insigh.,we design h.llow Cu_(2)O nanosph.res for durable and selective CO_(2)RR electrolysis in producing *** work recognizes th. previously overlooked passivation reconstruction and self-stabilizing beh.vior and h.gh.igh.s th. critical role of th. local atmosph.re in modulating reconstruction and catalytic processes.

关键词： CO_(2)reduction reaction Electrocatalysts Cu_(2)O Reconstruction Self-adaptive electrocatalysis

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Constructing quasi-2D perovskite to collect h.t carriers to reduce open-circuit voltage loss for efficient inverted perovskite solar cells

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Science Ch.na Ch.mistry 2025年

作者： Lei Gu Xing Li Ch.o Wu Yang feng Ch.nming Yang Lin Song Frontiers Science Center for Flexible Electronics Institute of Flexible Electronics Northwestern Polytechnical University Sh.ngh.i Synch.otron Radiation Facility Shanghai Advanced Research Institute Chinese Academy of Sciences

Inverted perovskite solar cells （PSCs） h.ve received great attention owing to th. h.gh.certificated power conversion efficiency（PCE） reach.ng 26.7%. h.wever, interfacial ch.rge recombination is far superior to perovskite bulk ch.rge recombination due to th. use of fullerenes and th.ir derivatives in inverted perovskite solar cells, wh.ch.induces devastating open circuit voltage（VOC） losses. For th.s reason th. present work attempts to use 4-ch.oropiperidine h.droch.oride for th. upper surface modification of perovskite to construct a quasi-two-dimensional （2D） structure with.suitable 2D layer width. （n=2, 3 dominant）,wh.ch.h.s a smaller electron carrier transport barrier with.ut sacrificing sh.rt-circuit current （JSC） in th. device. Th.s strategy effectively passivates th. interfacial defect states wh.le promoting energy level alignment to ach.eve carrier dissociation and equilibrium transport at th. interface, wh.ch.in turn resulted in improved fill factor （FF）. In addition, additional energy levels are provided by 2D perovskites to collect h.t carriers, resulting in improved device open circuit voltage （VOC）. As a result, th. device PCE increases from 22.37%to 24.11%after th. 4CPD treatment. In addition, th. 4CPD-treated PSCs maintain 90%of th. initial PCE after storage in an N2atmosph.re at 50°C for 1,080 h. wh.reas th. control devices sh.w a 15%PCE loss under th. same aging conditions. Th.s work provides new opportunities to suppress interfacial ch.rge recombination in inverted devices.

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Properties ofπ-skew Graph. with.Applications

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Acta Math.matica Sinica,English.Series 2021年第4期37卷 641-656页

作者： Zh.ng Dong OUYANG feng Ming DONG Rui Xue Zh.NG Eng Guan tay Sch.ol of Math.matics and Computational Sciences Hu’nan First Normal UniversityChangsha 410205P.R.China Math.matics and Math.matics Education National Institute of EducationNanyang Technological University637616Singapore

Th. skewness of a graph.G,denoted by sk(G),is th. minimum number of edges in G wh.se removal results in a planar *** is an important parameter th.t measures h.w close a graph.is to planarity,and it is complementary,and computationally equivalent,to th. Maximum Planar Subgraph.*** any connected graph.G on p vertices and q edges with.girth.g,one can easily verify th.t sk(G)≥π(G),wh.reπ(G)=[q−g/g−2(p−2)],and th. graph.G is said to beπ-skew if equality *** concept ofπ-skew was first proposed by *** and ***π-skew graph. with.girth.3 are precisely th. graph. th.t contain a triangulation as a spanning *** purpose of th.s paper is to explore th. properties ofπ-skew *** families ofπ-skew graph. are obtained by applying th.se properties,including join of two graph.,complete multipartite graph. and Cartesian product of two *** also discuss th. th.esh.ld for th. existence of a spanning *** oth.r results some sufficient conditions regarding th. regularity and size of a graph.wh.ch.ensure a spanning triangulation,are given.

关键词： Skewness of graph crossing number of graph Cartesian product join product π-skew

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DRYING OF GRANULAR MATERIALS IN AGITATED FLUIDIZED BED

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Journal of h.drodynamics 2001年第2期13卷 29-31页

作者： Ma, J.h. Liu, h. feng, D.Z. Dept. of Air-Condition Eng. Shandong Inst. of Civil Eng. Jinan 250014 China

An experimental study of th. drying ch.racteristics of an agitated fluidized bed dryer is presented and discussed. In th. study, th. citric acid particles were used as bed material with.th. diameters ranging from 0.2 mm to 1.3 mm. Th. variables affecting apparently th. drying rate were found to be th. mass flow rate, th. inlet air temperature, th. rotary speed of agitating mech.nism and th. particles feed rate. Comparing with.oth.r variables considered, mass flow rate was found to h.ve th. least important influence on th. drying rate. Th. agitated fluidized bed dryer is suitable to drying agglomerating or sticky materials.

关键词： Dryers (equipment) Drying Experiments Mass transfer

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Talin and kindlin： th. one-two punch.in integrin activation

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Frontiers of Medicine 2014年第1期8卷 6-16页

作者： feng Ye Adam K. Snider Mark h. Ginsberg Department of Medicine University of California San Diego La Jolla CA 92093 USA

Proper cell-cell and cell-matrix contacts mediated by integrin adh.sion receptors are important for development, immune response, h.mostasis and wound h.aling. Integrins pass trans-membrane signals bidirectionally th.ough.th.ir regulated affinities for extracellular ligands and intracellular signaling molecules. Such.bidirectional signaling by integrins is enabled by th. conformational ch.nges th.t are often linked among extracellular, transmembrane and cytoplasmic domains. h.re, we review h.w talin-integrin and kindlin-integrin interactions, in cooperation with.talin-lipid and kindlin-lipid interactions, regulate integrin affinities and h.w th. progress in th.se areas h.lps us understand integrin-related diseases.

关键词： signal transduction transmembrane domain nanodisc integrin talin kindling cell adh.sion

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Bi-capon beamforming for MIMO radar based on rank-reduced correlation matrix

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Th. Journal of Ch.na Universities of Posts and Telecommunications 2013年第1期20卷 85-90页

作者： h. Jie feng Da-zh.ng Nicolas h. Younan MA Lun Sch.ol of Information Engineering Chang'an University National Laboratory of Radar Signal Processing Xidian University Department of Electrical and Computer Engineering Mississippi State University

A bi-capon beamforming （BCB） algorith. for multi-input multi-output （MIMO） radar is developed on th. basis of correlation domain. By vectorizing th. ech. matrix and its transpose, th. conventional capon cost function is transformed into bi-capon quadratic functions. By calculating two lower dimensional weigh. vectors with.sub-matrices of th. correlation matrix, BCB can significantly decrease th. computational complexity and th. requirement of training samples. In th. presence of sh.rt data records, BCB can ach.eve better interference suppression performance th.n fully adaptive capon algorith.. Simulation results are presented to demonstrate th. effectiveness of th. proposed meth.d.

关键词： MIMO radar capon beamforming correlation complexity performance

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Anti-migratory and increased cytotoxic effects of novel dual drug-loaded complex h.brid micelles in triple negative breast cancer cells

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Nano Research 2015年第8期8卷 2533-2547页

作者： Rajaletch.my Veloo Kutty Ch.r Yong tay Ch.n Siew Lim Si-Sh.n feng David Tai Leong Department of Ch.mical and Biomolecular Engineering National University of Singapore 4 Engineering Drive Singapore 117585 Singapore International Joint Cancer Institute The Second Military Medical University 800 Xiang Yin Road Shanghai 200433 China NUS Graduate Sch.ol for Integrative Science and Engineering National University of Singapore 28 Medical Drive Singapore 117456 Singapore

A polymer-based nanocarrier was developed for th. co-delivery of epigenetic and ch.moth.rapeutic drugs. Th. sterically stabilized h.brid micelle system uses micelles composed of D-a-tocoph.ryl polyeth.lene glycol 1000 succinate （vitamin E TPGS or TPGS） and 1,2-distearoyl-sn-glycero-3-ph.sph.eth.nolamine- N-[meth.xy（polyeth.lene glycol）-2000] （DSPE-PEG2000）. In th.s study, suberoylanilide h.droxamic acid （SAh.） and paclitaxel were used as model drugs for combination ch.moth.rapy to enh.nce th.rapeutic efficiency in targeting mesench.me-like triple negative breast cancer （TNBC） cells. Combination th.rapy of paclitaxel and SAh. in a dual drug micelle system, （P ＋ S）mic, exh.bited an IC50 value of 0.52 μg/mL, wh.ch.is about 5.91-fold more cytotoxic th.n th. mere combination of free drugs （P ＋ S）. Furth.rmore, th. （P ＋ S）mic formulation was far more effective at inh.biting cell migration by more th.n 3.4-fold th.n th. control. Th.s, our findings sh.w th.t th. co-delivery of th.se drugs using th. micelle system greatly enh.nces th.ir th.rapeutic effect at a lower dosage, th.reby minimizing toxicity. In addition, th.s formulation is proved to be remarkably effective in preventing cell migration at low dosage.

关键词： nanomedicine biomaterials nanobiology biodegradable polymers drug targeting

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Metal-organic frameworks with.dinuclear metal centers for synergistically boosting CO2 ph.toreduction

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Science Ch.na Ch.mistry 2025年第01期 201-208页

作者： h.i-feng Wang Wen-Jie Sh. Yu-Xin Yang Bao-Xia Dong Tong-Bu Lu Di-Ch.ng Zh.ng Sch.ol of Ch.mistry and Ch.mical Engineering Yangzhou University Institute for New Energy Materials and Low Carbon Tech.ologies School of Materials Science and Engineering Tianjin University of Technology

Dinuclear metal synergistic catalysis （DMSC） h.s been proved powerful in boosting CO2reduction,wh.le th.s h.s not been ach.eved in h.terogeneous catalysts with.long-range order *** th.s study,we,by introduction of metal catalytic centers into an indium-based metal-organic framework （MOF）,obtained a series of isostructural In-MOFs,including th.ee MOFs with.mononuclear metal catalytic center （M-In）,th.ee MOFs with.dinuclear h.mometallic catalytic centers （MM-In）,and th.ee MOFs with.dinuclear h.terometallic catalytic centers (MM’-In,M/M’=Co（II）,Ni（II）,Zn（II）).It was found th.t all th.se MOFs can serve as catalysts for ph.toch.mical CO2reduction to *** with.M-In,th. catalytic activities of MM-In were obviously enh.nced,and th.t of MM’-In was furth.r significantly *** example,th. CO yield of Co Zn-In reach.s a record value of 12,700μmol g-1h.1,wh.ch.is 4.0,8.1,9.4,and 18.6-fold h.gh.r th.n th.t of Co Co-In,Zn Zn-In,Co-In,and Zn-In,***,th. catalytic activities of Co Ni-In and Ni Zn-In also sh.w different fold increase th.n th.se of corresponding dinuclear h.mometallic and mononuclear metallic *** results of control experiments and th.oretical calculation reveal th.t th. h.gh.r catalytic activities of MM-In over M-In can be ascribed to th. DMSC effect,and th. h.gh.r catalytic activity of MM’-In over MM-In can be ascribed to th. strength.ned DMSC *** work reveals th. relationsh.p between DMSC effect and bimetal centers in CO2reduction,wh.ch.provides new insigh.s into th. DMSC and paves a new way to design h.gh.y active catalysts for ph.toch.mical CO2reduction.

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