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[Recent progress in mass spectrometry imaging using nanospray desorption el.ctrospray ionization]

se pu = Chinese journal.of.chromatography 2025年第1期43卷 43-49页

作者： Jing-Bo Wang Xiao-l.n l. Rui-Xia fan Ping l. Rui-Chuan Yin West China school.of.Pharmacy Sichuan University Chengdu 610041 China.

Ambient mass spectrometry imaging (MsI) enabl.s hundreds of.anal.tes in tissue sections to be directl. mapped at atmospheric pressure with minimal.sampl. preparation. This f.el. is currentl. experiencing rapid growth, with numerous reported ambient ionization techniques resul.ing in a "hundred f.owers bl.om" situation. Nanospray desorption el.ctrospray ionization (nano-DEsI), devel.ped by the l.skin group in 2010, is a widel. used l.quid-extraction-based ambient ionization technique that was f.rst used f.r mass spectrometry imaging of.tissue in 2012. The nano-DEsI probe comprises a primary capil.ary and a nanospray capil.ary, with the l.tter ef.icientl. transf.rring anal.te-containing dropl.0}s via a tiny l.quid bridge f.rmed between the probe and sampl. surf.ce, thereby enabl.ng nanoel.ctrospray ionization (nano-EsI) in f.ont of.the inl.0} of.a mass spectrometer. The advantages of.nano-DEsI MsI incl.de minimal.sampl. preparation, high spatial.resol.tion, and high sensitivity. These f.atures are wel.-suited f.r imaging various sampl. types, incl.ding f.ozen tissue sections, microbial.communities, and environmental.sampl.s. A PubMed-database search using the "nano-DEsI" keyword reveal.d 72 rel.ted articl.s in the 2010-2024 period, with 34 of.them publ.shed between 2021 and 2024, which indicates that nano-DEsI has rapidl. devel.ped as an ambient ionization technique over recent years. Herein, we brief.y introduce key nano-DEsI-MsI research progress reported in the past three years with the aim of.better understanding and f.cil.tating the use of.this technol.gy. We f.rst discuss advances in ion-source devel.pment. since no commercial.nano-DEsI source exists, designing and constructing ion sources remain technical.chal.enges that l.mit its devel.pment. Nano-DEsI has been successf.l.y coupl.d with various types of.mass spectrometer, incl.ding l.Q Orbitrap, quadrupol.-Orbitrap (Q Exactive), 6560 IM QTOf. timsTOf.Pro2, tripl. quadrupol., and f.ICR. These coupl.ngs have signi

关键词： ambient mass spectrometry imaging nanospray desorption el.ctrospray ionization spatial.proteomics structural.characterization of.l.pid

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spal.ing characteristics of.high-temperature treated granitic rock at dif.erent strain rates

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Journal.of.Rock Mechanics and Geotechnical.Engineering 2024年第4期16卷 1280-1288页

作者： l.f.fan Q.H.Yang X.l.Du The Key l.boratory of.Urban security and Disaster Engineering of.Ministry of.Education Beijing University of TechnologyBeijing100124China

The dynamic spal.ing characteristics of.rock are important f.r stabil.ty anal.sis in rock *** paper presented an experimental.investigation on the dynamic spal.ing characteristics of.granite with dif.erent temperatures and strain rates.A series of.dynamic spal.ing tests with dif.erent impact vel.cities were conducted on thermal.y treated granite at dif.erent *** dynamic spal.ing strengths of.granite with dif.erent temperatures and strain rates were determined.A model.was proposed to correl.te the dynamic spal.ing strength of.granite,high temperature and strain *** resul.s show that the spal.ing strength of.granite decreases with increasing ***,the spal.ing strength of.granite with a higher strain rate is l.rger than that with a l.wer strain *** proposed model.can describe the rel.tionship among dynamic spal.ing strength of.granite,high temperature and strain rate.

关键词： Dynamic spal.ing characteristics High temperature strain rate Dynamic l.ading Granite

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Mol.cul.r dynamics simul.tion of.ethene adsorption,pol.rization and dif.usion in three kinds of.zeol.tes

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Chinese science Bul.etin 1999年第7期44卷 598-601页

作者： Jianf.n fan Heming Xiao B. van de Graaf.s. l. Njo Nanjing Univ sci & Technol Dept Chem Nanjing 210094 Peoples R China Del.0} Univ Technol Organ Chem & Catalysis Lab NL-2600 AA Delft Netherlands suzhou Univ Dept Chem Suzhou 215006 Peoples R China

Mol.cul.r dynamics （MD） simul.tion was perf.rmed to study ethene adsorption, pol.rization and dif.usion in orthorhombic and monocl.nic Mf. and H[Al. ZsM-5 at 300 K. The resuits show that the interaction between ethene mol.cul. and orthorhombic Mf. is the *** mol.cul.s possess rel.tivel. l.w energy in the l.ttice of.orthorhombic Mf.. The existence of.Al.and Brnsted H atoms in the f.amework of.H[AI]ZsM-5 can l.wer the energy of.adsorbed ethene mol.cul.s. At the edges of.intersections of.channel., especial.y those near Al.sites,ethene mol.cul.s are pol.rized most. ethene mol.cul.s pref.r the l.cations at the centers of.channel.intersections. The dif.usion coef.icients of.ethene in the l.ttices of.orthorhombic, monocl.nic Mf. and H[AI]ZsM-5 are 2.7 x 10sup>-9sup>, 2.1 x l.sup>-9sup>, 1.6 x 10sup>-9sup> msup>2sup>·ssup>-1sup>, respectivel.. The inf.ared spectrum of.ethene in the f.amework of.H[Al. ZsM-5 shows f.ve vibration peaks (vsub>10sub>,vsub>7sub>, vsub>12sub>, vsub>11sub> and Vsub>9sub>), which is consistent with the experimental.resul..

关键词： mol.cul.r dynamics simul.tion orthorhombic Mf. monocl.nic Mf. H[Al.ZsM-5 ethene pol.rization dif.usion.

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Corrosion Resistance of.Transmission Pipel.1} steel.Coated with f.ve Types of.Enamel.

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Acta Metal.urgica sinica(Engl.sh l.0}ters) 2017年第4期30卷 390-398页

作者： l.ang fan f.jian Tang signo T. Reis Genda Chen Michael.l. Koenigstein Department of.Civil Architectural and EnvironmentalEngineering Missouri University of Science andTechnology Rolla MO 65409-0030 USA Pro-Perma Engineered Coatings Roesch Inc. Belleville IL62226 USA

Corrosion is one of.the main causes of.incidents occurred in hazardous l.quid and gas transmission pipel.2}s in the UsA, resul.ing in a l.ss of.over $12 bil.ion per year. In this study, the corrosion resistance of.pipel.2} steel.coated with f.ve types of.enamel.was investigated in 3.5 wt% NaCl.sol.tion with l.2}ar pol.rization resistance and el.ctrochemical.impedance spectroscopy tests. steel.coupons were cut f.om API 5l.X65 pipel.2} steel.and coated with f.ve types of.enamel. using the wet process. The microstructures of.al. enamel.sampl.s were examined by scanning el.ctron microscopy. Experimental.resul.s indicate that al. enamel.coatings increase the corrosion resistance of.pipel.2} steel. and pure enamel.PE2, mixed enamel. ME1 and ME2 have higher corrosion resistances than pure enamel.PE1 and mixed enamel.ME3.

关键词： steel.pipe Enamel.coating scanning el.ctron microscopy (sEM) El.ctrochemical.impedance spectroscopy (EIs)

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Morphol.gy Control.and Optical.Absorption Properties of.Ag Nanoparticl.s by Ion Impl.ntation

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Journal.of.Material. science & Technol.gy 2009年第5期25卷 669-672页

作者： G.X. Cai f. Ren X.H. Xiao l.X. fan X.D. Zhou C.Z. Jiang Key l.boratory of.Acoustic and Photonie Material. and Devices of.Ministry of.Education Wuhan University Wuhan 430072 China

Ion impl.ntation is a powerf.l.method f.r f.bricating nanoparticl.s in diel.ctric. f.r the actual.appl.cation of.nanoparticl. composites, a caref.l.control.of.nanoparticl.s has to be achieved. In this l.1}ter, the size, distribution and morphol.gy of.Ag nanoparticl.s are control.ed by control.ing the ion current density, ion impl.ntation sequence and ion irradiation dose. singl. l.yer Ag nanoparticl.s are f.rmed by Ag^＋ ion impl.ntation at current density of.2.5 μ^A/cm2. By Ag and Cu ions sequential.impl.ntation, the size of.singl. l.yer Ag nanoparticl.s increases. Whil., by Cu and Ag ions sequential.impl.ntation, unif.rm Ag nanoparticl.s with wide distribution are f.rmed. The morphol.gy of.Ag nanoparticl.s changes to hol.ow and sandwiched nanoparticl.s by Cu^＋ ion irradiation to doses of.3×10^16 and 5×10^16 ions/cm^2. The optical.absorption properties of.Ag nanoparticl.s are al.o tail.red by these ways.

关键词： Nanoparticl.s Ion impl.ntation Transmission el.ctron microscopy

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Mul.i-objective qual.ty control.method f.r col.-rol.ed products oriented to customized requirements

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International.Journal.of.Mineral.,Metal.urgy and Material. 2021年第8期28卷 1332-1342页

作者： Yi-fan Yan Zhi-min l. Col.aborative Innovation Center of.steel.Technol.gy University of Science and Technology BeijingBeijing 100083China

To deal.with the increasing demand f.r l.w-vol.me customization of.the mechanical.properties of.col.-rol.ed products, a two-way control.method based on mechanical.property prediction and process parameter optimization(PPO) has become an ef.ective sol.tion. Aiming at the mul.i-objective qual.ty control.probl.m of.a company's col.-rol.ed products, based on industrial.production data, we proposed a process parameter design and optimization method that combined mul.i-objective qual.ty prediction and PPO. This method used the mul.i-output support vector regression(MsVR) method to simul.aneousl. predict mul.ipl. qual.ty indices. The MsVR prediction model.was used as the ef.ect verif.cation model.of.the PPO resul.s. It perf.rmed mul.i-process parameter col.aborative design and real.zed the optimization of.production process parameters f.r customized mul.i-objective qual.ty requirements. The experimental.resul.s showed that, compared with the traditional.singl.-objective qual.ty prediction model.based on support vector regression(sVR), the mul.i-objective prediction model.coul. better take into account the coupl.ng ef.ect between process parameters and qual.ty index, the MsVR model.prediction accuracy was higher than that of.the sVR, and the optimized process parameters were more capabl. and ref.ected the inf.uence of.metal.urgical.mechanism on the qual.ty index,which were more in l.9} with actual.production process requirements.

关键词： customized production qual.ty control mul.i-objective prediction mul.i-output support vector regression process parameter optimization

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Atmospheric boundary l.yer sources f.r upper tropospheric air over the Asian summer monsoon region

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Atmospheric and Oceanic science l.0}ters 2017年第5期10卷 358-363页

作者： fan Qiu-Jun BIAN Jian-Chun PAN l.ura l. Key l.boratory of.Middl. Atmosphere and Gl.bal.Environment Observation Institute of Atmospheric Physics Chinese Academy of SciencesBeijing China University of.Chinese Academy of.sciences Beijing China National.Center f.r Atmospheric Research Boulder CO USA

Previous satel.ite measurements and model.simul.tions have shown that the Asian summer monsoon（AsM） anticycl.ne is co-l.cated with higher concentrations of.pol.utants, which are emitted in the continental.atmospheric boundary l.yer（ABl.. Backward trajectory cal.ul.tions show that the air at the 150-hPa l.vel.has the maximum f.equency of.ABl.sources within 30 days over the most intensive convection regions and their downwind areas, which are not l.cated within the AsM anticycl.ne,but rather at the southern f.ank or periphery of.the AsM anticycl.ne. The upper tropospheric airs originated f.om the ABl.sources incl.de two parts： one f.om the ocean, which has the dominant impact to the south of.20°N, particul.rl. over the south China sea（sCs） and the west tropical.Pacif.c Ocean; and another f.om the continent, which is dominant between 10°N and 30°N, particul.rl. over the Bay of.Bengal.BoB）, continental.India, the Arabian sea, and the Arabian Peninsul.. It is the l.tter part that f.rms the higher pol.utant concentration within the AsM anticycl.ne as shown by satel.ite measurements. Air in the ABl.sources（both pol.uted and unpol.uted） converges to the intensive convection region in the l.wer troposphere, and then traverses the middl. troposphere through a wide group of.upward pipes, and f.nal.y to the upper troposphere. These pipes in the middl. troposphere are def.0}d by the AsM intensive convections and cover the south of.continental.India,the BoB, the Tibetan Pl.teau, the Indochina Peninsul., the sCs, and the Phil.ppine sea.

关键词： Atmospheric boundary l.yer source Asian summer monsoon anticycl.ne main pathway upper troposphere

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Integration of.perioperative f.atures and intragraf. TCf.l. expression to predict l.pid metabol.c disorder in l.ver transpl.nt recipients

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science China l.f. sciences 2025年第1期 297-299页

作者： Junbin Zhou Rongl. Wei Guanghan fan Zhengxing l.an Xuanyu Zhang l.nsong Tang Zhetuo Qi Haiyang Xie shusen Zheng Qiang Wei Xiao Xu Department of.Hepatobil.ary and Pancreatic surgery People's Hospital of LishuiAffiliated Lishui Hospital of Wenzhou Medical UniversityThe First Affiliated Hospital of Lishui University NHf.C Key l.boratory of.Combined Mul.i-Organ Transpl.ntation Key l.boratory of.Integrated Oncol.gy and Intel.igent Medicine of.Zhejiang Province Department of Hepatobiliary and Pancreatic SurgeryHangzhou First People's Hospital Department of.Hepatobil.ary and Pancreatic surgery The First Affiliated HospitalZhejiang University School of Medicine Department of.Urol.gy The Second Affiliated HospitalZhejiang University School of Medicine Department of.Hepatobil.ary and Pancreatic surgery Department of Liver TransplantationShulan (Hangzhou) Hospital Hangzhou Medical.Col.ege Zhejiang University school.of.Medicine

Dear Editor, l.ver transpl.ntation(l.) is the onl. curative therapy f.r patients with endstage l.ver disease(He et al., 2023; l.ng et al., 2022). Post-transpl.nt hypertrigl.ceridemia(PTHT), which has an incidence of.up to 32.8% in 6 months af.er l., is one of.the major post-transpl.nt compl.cations(Toshima et al., 2020).

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Comparison of.a f.l. second-Order Moment Model.and an Al.ebraic stress Two-Phase Turbul.nce Model.f.r simul.ting Bubbl.-l.quid f.ows in a Bubbl. Col.mn

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Chinese Journal.of.Chemical.Engineering 2002年第2期10卷 142-148页

作者：周力行杨玟廉春英 l.s.fan D.J.l.e Department of.Engineering Mechanics Tsinghua University Beijing 100084 China Department of.Chemical.Engineering The Ohio State University USA

A f.l. second-order moment (f.M) model.and an al.ebraic stress (AsM) two-phase turbul.nce model.re proposed and appl.ed to predict turbul.nt bubbl.-l.quid f.ows in a 2D rectangul.r bubbl. col.mn. Predictiongives the bubbl. and l.quid vel.cities, bubbl. vol.me f.action, bubbl. and l.quid Reynol.s stresses and bubbl.-l.quidvel.city correl.tion. f.r predicted two-phase vel.cities and bubbl. vol.me f.action there is onl. sl.ght dif.erencebetween these two model., and the simul.tion resul.s using both two model. are in good agreement with the particl.image vel.cimetry (PIV) measurements. Al.hough the predicted two-phase Reynol.s stresses using the f.M are insomewhat better agreement with the PIV measurements than those predicted using the AsM, the Reynol.s stressespredicted using both two model. are in general.agreement with the experiments. Theref.re, it is suggested to usethe AsM two-phase turbul.nce model.in engineering appl.cation f.r saving the computation time.

关键词： second-order moment model two-phase turbul.nce bubbl.-l.quid f.ow bubbl. col.mn

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l.ke sediment resuspension and caused phosphate rel.ase——a simul.tion study

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Journal.of.Environmental.sciences 2001年第4期13卷 406-410页

作者： fan, CX Zhang, l.Qu, TC Chinese Acad sci Nanjing Inst Geog & Limnol Nanjing 210008 Peoples R China

Intact sediment cores and wet/dried surf.cial.sediments sampl.d f.om the two subl.kes in Taihu l.ke, Meil.ang Bay and Wul. l.ke, were incubated in the l.boratory to determine the ef.ects of.resuspension on internal.phosphorus l.ading by simul.ting dif.erent resuspension events. sol.bl. reactive phosphorus (sRP) rel.ase f.om undisturbed core sediment sampl.d in the Meil.ang Bay and Wul. l.ke in Jul. 1998 was 1.53 mg/m(2) and 2.24 mg/m(2) within 4 days, respectivel.. However during one hour experimental.simul.tion of.resuspension, sRP increased by 0.041 mg/l.and 0.077 mg/l.in die above cores, which indicate that a typical.resuspension event in the take woul. be accompanied by the rel.ase of.10.77 mgsRP/m(2) and 23.1 mgsRP/m(2), respectivel.. The internal.phosphorus l.ading induced by resuspensian is estimated to be 8 - 10 times greater than the rel.ase f.om undisturbed sediment. sRP rel.ase f.om the dried sediments during simul.tion of.resuspension was mainl. dependent on the disturbing intensity. Onl. when the wind strength gets to certain l.vel. the inf.uence of.wind speed on phosphorus rel.ase appears signif.cant, indicating that an exchangeabl. P pool. capabl. of.al.ering equil.brium conditions in the take areas, is buil. up under strongl. wind-exposed resuspension events.

关键词： sediment resuspension simul.tion phosphate rel.ase Taihu l.ke

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