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高性能电容器用富勒烯/石墨烯三维全碳杂化材料

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新型炭材料 2020年第6期35卷 684-695页

作者：程蕾李幸娟李静邱汉迅薛裕华 Kuznetsova-Iren Evgenyevna vladimir Kolesov 陈成猛杨俊和上海理工大学材料科学与工程学院上海200093 Kotelnikov Institute of.Radio Engineering and Electronics Russian Academy of ScienceMoscow 125009Russia 中国科学院山西煤化学研究所炭材料重点实验室山西太原030001

通过简单的水热过程将C60分子引入石墨烯片层,可控制备了具有三维多孔结构的全碳C60/石墨烯杂化材料,该材料作电极材料时电容性能得到明显提高。研究表明,C60分子和石墨烯骨架中的碳六元环之间的共轭相互作用有利于C60与石墨烯在高压水... 详细信息

通过简单的水热过程将C60分子引入石墨烯片层,可控制备了具有三维多孔结构的全碳C60/石墨烯杂化材料,该材料作电极材料时电容性能得到明显提高。研究表明,C60分子和石墨烯骨架中的碳六元环之间的共轭相互作用有利于C60与石墨烯在高压水热条件下自组装形成三维多孔结构。C60分子的加入使杂化产物具有优化的多孔结构和更多的氧化还原活性位点,这赋予杂化产物优异的电化学性能。以浓度为6 mol/L KOH溶液作为电解质,当电流密度为1 A/g时,其比电容为332.3 f.g,与三维多孔结构石墨烯材料电极相比提高了54.5%。此外,作为完全由碳原子组成的复合电极材料,其表现出的电化学性能优于文献报道的类似碳基材料。这一研究表明全碳杂化电极材料在用于制造高性能超级电容器方面具有很强竞争力和广阔应用前景,为未来基于全碳电极的高性能储能器件的设计和制备提供了有价值参考。

关键词：石墨烯富勒烯(C 60) 全碳杂化电化学性能超级电容器

The state of.gold in phases of.the Cu-f.-S system:In situ X-ray absorption spectroscopy study

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Geoscience f.ontiers 2023年第3期14卷 103-116页

作者： Boris R.Tagirov Olga N.f.limonova Alexander L.Trigub Ilya V.Vikentyev Elena V.Kovalchuk Maximilian S.Nickolsky Andrey A.Shiryaev vladimir L.Reukov Dmitry A.Chareev Institute of.Geology of.Ore Deposits(IGEM RAS) 35Staromonetnyi per119017 MoscowRussia National Research Centre‘Kurchatov Institute’ 1Akademika Kurchatova pl123182 MoscowRussia Institute of.Physical Chemistry and Electrochemistry(IPCE RAS) 31Leninsky Prospect119071 MoscowRussia Institute of.Experimental Mineralogy(IEM RAS) 142432 ChernogolovkaMoscow RegionRussia

Chalcopyrite and bornite are the main Au-bearing minerals at Cu porphyry deposits,volcanogenic massive sulf.de(VMS)deposits,Cu-Ni deposits of.the maf.c magmatic complexes,and ores of.submarine sulf.de *** and intermediate solid solutions with wide compositional variations(bnss and iss–high-temperature chalcopyrite,correspondingly),which can scavenge economic concentrations of.Au,appear in the Cu-f.-S system at ore-f.rming ***,the state of.Au in bnss and iss is yet *** solve this conundrum,we synthesized samples with net chemical composition of.bnss and iss,studied them by in situ X–ray absorption spectroscopy(XAS),and used the experimental data to explain the Au distribution among natural ore-f.rming *** sulf.de samples were obtained at 495–700℃ in Au-saturated system by means of.salt f.ux *** bnss contained1.2–1.6 log units more Au than iss:up to 18 wt.%Au in bnss vs 0.4 wt.%Au in iss at 700*** increase of.temperature resulted in the sharp increase of.Au concentration in both phases,1 log unit per 100℃ at f.S2)close to S_((l)) *** of.Au L_(3)-edge spectra recorded at 25–675℃ revealed that at 25℃ Au exists mainly in the metallic *** t>500℃ the spectral f.atures of.Audisappear,and “chemically bound”Au *** Au f.rm of.occurrence in the iss f.eld is interpreted as Au-bearing clusters with a stromeyerite-like(CuAgS)*** Cu_(2–x)S and bnss contain Au in a mixture of.stromeyeritelike and petrovskaite-like(Au_(0.8)Ag_(1.2)S)*** chemical composition of.both f.rms is close to CuAuS,where the nearest Au neighbors are two S atoms at R_(Au-S)=2.34–2.36Å.Results of.the present study allow to determine the state of.Au and its concentration in the main Cu-bearing minerals of.sulf.de ores as a f.nction of.the T-f.S_(2))-compositional *** to the sharp increase of.the CuAuS clusters stability with increasing temperature,in high-temperature ores f.rmed at t>350℃ A

关键词： “Invisible”gold Bornite solid solution Intermediate solid solution Digenite Chalcopyrite X-ray absorption spectroscopy

f.actal Characteristics of.Microporous Adsorbents

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Materials Sciences and Applications 2017年第8期8卷 603-613页

作者： vladimir V. Kutarov Eva Schief.rstein Yuriy Leonidovych Zub Erich Robens Research Institute of.Physics I. I. Mechnikov National University Odesa Ukraine f.aunhof.r Institute UMSICHT Oberhausen Germany Chujko Institute of.Surf.ce Chemistry National Academy of Sciences of Ukraine Kiev Ukraine Battelle-Institut e.V. Frankfurt am Main Germany (formerly) Schlesierstr. 5 Friedrichsdorf Germany

The traditional version of.the theory of.volume f.lling of.micropores was used f.r the estimation of.the f.actal dimension of.microporous solids. f.r this purpose, the Dubinin’s integral equation was solved f.r inf.nite and limited integration limits. The results were applied to the adsorption of.nitrogen (T = 78 K) on coal samples and Davisil f.silica and to the adsorption of.water (Т = 293 К) on lunar soil sample and on rice starch.

关键词： Pore Structure Micropores f.actal Dimension Dubinin’s Equation Mathematical Analysis

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中红外大模场单模全固态硫系光子晶体光纤

中国激光 2024年第17期51卷 240-248页

作者：李宁哲贾金升张敏王煜泽肖峰黄庆白胜闯 vladimir Shiryaev 戴世勋聂秋华王训四宁波大学信息科学与工程学院高等技术研究院红外材料与器件实验室浙江宁波315211 浙江省光电探测材料及器件重点实验室浙江宁波315211 俄罗斯科学院高纯物质化学研究所俄罗斯下诺夫哥罗德603951 宁波海洋研究院浙江宁波315832

针对当前硫系光纤难以同时实现高功率传输与高光束质量的问题,通过COMSOL软件仿真模拟光纤性质,设计出了满足单模传输需要且具有大模场面积的光子晶体光纤(PCf.的结构参数。所设计的光纤在1.5~10μm的波长范围内满足高阶模(LP_(11))与基... 详细信息

针对当前硫系光纤难以同时实现高功率传输与高光束质量的问题,通过COMSOL软件仿真模拟光纤性质,设计出了满足单模传输需要且具有大模场面积的光子晶体光纤(PCf.的结构参数。所设计的光纤在1.5~10μm的波长范围内满足高阶模(LP_(11))与基模(LP_(01))的限制损耗比大于10~2的单模条件,且光纤基模的有效模面积在波长2μm处约为5362μm^(2)。根据仿真模拟的结构参数,探索出新型动、静态蒸馏相结合的技术,制备出高纯硫系玻璃,结合新型的挤压-堆积法,制备出基于全硫系玻璃的全固态大模场单模光子晶体光纤。该光纤在波长1.55μm处的近高斯光能量分布特征验证了其单模特性;同时在弯曲半径为14 cm的1.5 m长的光纤中观察到低弯曲损耗为1 dB,与仿真结果基本一致,表明此全固态光子晶体光纤具有出色的单模传输和抗弯性能,在中红外高能激光传输方面具备一定的应用潜能。

关键词：光纤光学中红外全固态光子晶体光纤硫系玻璃大模场面积单模传输

Deciphering the Role of.Klf.0 in the Cerebellum

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Journal of.Biomedical Science and Engineering 2022年第5期15卷 140-156页

作者： Malek Kammoun Lydie Nadal-Desbarats Sandra Même Aude Laf.ux Corinne Huchet Géraldine Meyer-Dilhet Julien Courchet f.édéric Montigny f.édéric Szeremeta William Même vladimir Veksler Jérôme Piquereau Philippe Pouletaut Malayannan Subramaniam John R. Hawse Jean-Marc Constans Sabine f. Bensamoun Biomechanics and Bioengineering CNRS UMR 7338 Sorbonne University—University of Technology of Compiègne Compiègne France iBrain CNRS UMR 1253 University of Tours Tours France Center f.r Molecular Biophysics CNRS UPR4301 Orléans France Therassay Platf.rm University of Nantes Nantes France INSERM UMR1089 University of Nantes Nantes France CNRS UMR-5310 and INSERM U-1217 NeuroMyoGène Institute Villeurbanne France INSERM PST-ASB University of Tours Tours France INSERM UMR-S 1180 University of Paris-Saclay Chatenay-Malabry France Department of.Biochemistry and Molecular Biology Mayo Clinic Rochester USA CHIMERE EA7516 UPJV Faire Faces Institute Amiens France

Recent studies have demonstrated a new role f.r Klf.0, a Krüppel-like transcription f.ctor, in skeletal muscle, specif.cally relating to mitochondrial f.nction. Thus, it was of.interest to analyze additional tissues that are highly reliant on optimal mitochondrial f.nction such as the cerebellum and to decipher the role of.Klf.0 in the f.nctional and structural properties of.this brain region. In vivo (magnetic resonance imaging and localized spectroscopy, behavior analysis) and in vitro (histology, spectroscopy analysis, enzymatic activity) techniques were applied to comprehensively assess the cerebellum of.wild type (WT) and Klf.0 knockout (KO) mice. Histology analysis and assessment of.locomotion revealed no signif.cant dif.erence in Klf.0 KO mice. Dif.usion and texture results obtained using MRI revealed structural changes in KO mice characterized as def.cts in the organization of.axons. These modif.cations may be explained by dif.erences in the levels of.specif.c metabolites (myo-inositol, lactate) within the KO cerebellum. Loss of.Klf.0 expression also led to changes in mitochondrial activity as ref.ected by a signif.cant increase in the activity of.citrate synthase, complexes I and IV. In summary, this study has provided evidence that Klf.0 plays an important role in energy production and mitochondrial f.nction in the cerebellum.

关键词： Klf.0 Cerebellum Mice Magnetic Resonance Imaging and Spectroscopy Metabolomics Mitochondria

Adult human liver slice cultures:Modelling of.liver f.brosis and evaluation of.new anti-f.brotic drugs

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World Journal of.Hepatology 2021年第2期13卷 187-217页

作者： Daria Kartasheva-Ebertz Jesintha Gaston Loriane Lair-Mehiri Pierre-Philippe Massault Olivier Scatton Jean-Christophe Vaillant vladimir Alexei Morozov Stanislas Pol Sylvie Lagaye Institut Pasteur Immunobiologie des Cellules DendritiquesINSERM U1223Paris 75015France BioSPC Universitéde ParisParis 75005France Service de Chirurgie digestive Hépato-biliaire et EndocrinienneAPHPGroupe Hospitalier CochinParis 75014France Service de Chirurgie digestive et Hépato bilio pancréatique AP-HPGroupe Hospitalier La Pitié-SalpétrièreMedecine Sorbonne UniversitéParis 75013France Center f.r HIV and Retrovirology Department of Infectious DiseasesRobert Koch InstituteBerlin 13353Germany Département d'Hépatologie AP-HPGroupe Hospitalier CochinUniversitéde ParisParis 75014France

BACKGROUND Liver f.brosis can result in end-stage liver f.ilure and *** To examine human liver f.brogenesis and anti-f.brotic therapies,we evaluated the three dimensional ex vivo liver slice(LS)*** f.brotic liver samples(f. to f. f.brosis stage according to the METAVIR score)were collected f.om patients af.er liver *** liver slices(HLS)were cultivated f.r up to 21 *** C virus(HCV)inf.ction,alcohol(ethanol stimulation)and steatosis(palmitate stimulation)were examined in f.brotic(f. to f.)liver slices inf.cted(or not)with HCV.f.-f. HLS were used as *** day 0,either ursodeoxycholic acid(choleretic and hepatoprotective properties)and/or α-tocopherol(antioxidant properties)were added to standard of.care on HLS and f.brotic liver slices,inf.cted(or not)with *** of.the biomarkers of.f.brosis and the triglyceride production were checked by quantitative reverse transcription polymerase chain reaction and/or enzymelinked immunosorbent *** The cultures were viable in vitro f.r 21 days allowing to study f.brosis inducers and to estimate the ef.ect of.anti-f.brotic *** of.the biomarkers of.f.brosis and the progression to steatosis(estimated by triglycerides production)was increased with the addition of.HCV and/or ethanol or *** day 15 of.the f.llow-up studies,a signif.cant decrease of.both transf.rming growth f.ctorβ-1 and Procol1A1 expression and triglycerides production was observed when a combined anti-f.brotic treatment was applied on HCV inf.cted f.-f. LS *** These results show that the human three dimensional ex vivo model ef.ectively ref.ects the in vivo processes in damaged human liver(viral,alcoholic,nonalcoholic steatohepatitis liver diseases)and provides the proof.of.concept that the LS examined model permits a rapid evaluation of.new anti-f.brotic therapies when used alone or in combination.

关键词： Human liver f.brosis Hepatitis C virus Alcoholic liver disease Nonalcoholic steatohepatitis Ex vivo model Drugs

Thermal,inf.ared spectroscopy and molecular modeling characterization of.bone:An insight in the apatite-collagen type I interaction

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Advances in Biological Chemistry 2013年第2期3卷 215-223页

作者： Alejandro Heredia Maria Colin-Garcia Miguel A.Pena-Rico Jose Grácio f.avio f.Contreras-Torres Andrés Rodríguez-Galván Lauro Bucio vladimir A.Basiuk Departamento de Radiaciones y Radioquímica Instituto de Ciencias NuclearesUNAMD.F.MéxicoMéxico Nanotechnology Research Division Centre for Mechanical Technology&AutomationUniversity of AveiroAveiroPortugal S.I.O.V.Instituto de Geología UNAMD.F.MéxicoMéxico Departamento de Estado Sólido Instituto de FísicaUniversidad Nacional Autónoma de México(UNAM)D.F.MéxicoMéxico Instituto de Biotecnología UNAMD.F.MéxicoMéxico Departamento de f.sica de Plasmas y de Intearcción de Radiación con la Materia Instituto de Ciencias NuclearesUNAMD.F.MéxicoMéxico

An insight into the interaction of.collagen type I with apatite in bone tissue was perf.rmed by using dif.erential scanning calorimetry, f.urier transf.rm inf.ared spectroscopy, and molecular modeling. Scanning electron microscopy shows that bone organic content incinerate gradually through the dif.erent temperatures studied. We suggest that the amide regions of.the type I collagen molecule (mainly C=O groups of.the peptide bonds) will be important in the control of.the interactions with the apatite f.om bone. The amide I inf.ared bands of.the collagen type I change when interacting to apatite, what might conf.rm our assumption. Bone tissue results in a loss of.thermal stability compared to the collagen studied apart, as a consequence of.the degradation and f.rther combustion of.the collagen in contact with the apatite microcrystals in bone. The thermal behavior of.bone is very distinctive. Its main typical combustion temperature is at 360°C with a shoulder at 550°C compared to the thermal behavior of.collagen, with the mean combustion peak at ca. 500°C. Our studies with molecular mechanics (MM+ f.rce f.eld) showed dif.erent interaction energies of.the collagen-like molecule and dif.erent models of.the apatite crystal planes. We used models of.the apatite (100) and (001) planes;additional two planes (001) were explored with phosphate-rich and calcium-rich f.ces;an energetic pref.rence was f.und in the latter case. We preliminary conclude that the peptide bond of.collagen type I is modif.ed when the molecule interacts with the apatite, producing a decrease in the main peak f.om ca. 500°C in collagen, up to 350°C in bone. The combustion might be related to collagen type I, as the ΔH energies present only small variations between mineralized and non-mineralized samples. The data obtained here give a molecular perspective into the structural properties of.bone and the change in collagen properties caused by the interaction with the apatite. Our study can be usef.l to un

关键词： Bone,Collagen Type I Apatite Dif.erential Scanning Calorimetry(DSC) Molecular Modeling f.urier Transf.rm Inf.ared(f.IR)Spectroscopy

Genetic reporter analysis reveals an expandable reservoir of.OCT4+cells in adult skin

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Cell Regeneration 2014年第1期3卷 63-68页

作者： Anne Limbourg Sabine Schnabel vladimir J Lozanovski L Christian Napp Teng-Cheong Ha Tobias Maetzig Johann Bauersachs Hassan Y Naim Axel Schambach f.orian P Limbourg Research Group Regenerative Agents HannoverGermany REBIRTH Cluster of.Excellence HannoverGermany Integrated Research Center Transplantation(If.-Tx) HannoverGermany Current af.iliation:Department of.Plastic Hand and Reconstructive SurgeryHannoverGermany Department of.Cardiology and Angiology HannoverGermany Institute of.Experimental Hematology OE6960 Hannover Medical SchoolCarl-Neuberg-Str.1D-30625 HannoverGermany Department of.Physiological Chemistry Hannover Veterinary SchoolHannoverGermany Division of.Hematology/Oncology Boston Children’s HospitalHarvard Medical SchoolHarvardUSA Department of.Nephrology and Hypertension Hannover Medical SchoolHannoverGermany Department of.General and Transplant Surgery University Hospital HeidelbergHeidelbergGermany Vascular Medicine and Transplantation Research Dept.of Nephrology and HypertensionOE 6841Hannover Medical SchoolCarl-Neuberg-Str.1D-30625 HannoverGermany

The transcription f.ctor Oct4(Pou5f.)is a critical regulator of.pluripotency in embryonic and induced pluripotent stem ***,Oct4 expression might identif. somatic stem cell populations with inherent multipotent potential or a propensity f.r f.cilitated ***,analysis of.Oct4 expression is conf.unded by Oct4 pseudogenes or non-pluripotency-related *** analysis of.a transgenic Oct4-EGf. reporter mouse identif.ed testis and skin as two principle sources of.Oct4^(+)cells in postnatal *** the prevalence of.Gf.^(+)cells in testis rapidly declined with age,the skin-resident Gf.^(+)population expanded in a cyclical *** cells were identif.ed as epidermal stem cells dwelling in the stem cell niche of.the hair f.llicle,which endogenously expressed all principle reprogramming f.ctors at low ***,skin wounding or non-traumatic hair removal robustly expanded the Gf.^(+)epidermal cell pool not only locally,but also in uninjured skin areas,demonstrating the existence of.a systemic ***,the epithelial stem cell niche of.the hair f.llicle harbors an expandable pool of.Oct4^(+)stem cells,which might be usef.l f.r therapeutic cell transf.r or f.cilitated reprogramming.

关键词： Oct4 Epidermal stem cells Skin Transgenic reporter mice

Ef.ects of.dif.erently polarized microwave radiation on the microscopic structure of.the nuclei in human f.broblasts

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Journal of.Zhejiang University-Science B(Biomedicine & Biotechnology) 2010年第10期11卷 801-805页

作者： Yuriy G.SHCKORBATOV vladimir N.PASIUGA Elena I.GONCHARUK Tatiana Ph.PETRENKO Valentin A.GRABINA Nicolay N.KOLCHIGIN Dmitry D.IVANCHENKO Victor N.BYKOV Oleksandr M.DUMIN Kharkiv National University Institute f.r Problems of.Cryobiology and Cryomedicine of.the National Academy of.Sciences of.Ukraine

To investigate the inf.uence of.microwave radiation on the human f.broblast nuclei,the ef.ects of.three variants of.electromagnetic wave polarization,linear and lef.-handed and right-handed elliptically polarized,were *** conditions were:f.equency(f. 36.65 GHz,power density(P) at the surf.ce of.exposed object 1,10,30,and 100 μW/cm2,exposure time 10 *** f.broblasts growing in a monolayer on a cover slide were exposed to microwave electromagnetic *** layer of.medium that covered cells during microwave exposure was about 1 mm *** were stained immediately af.er irradiation by 2%(w/v) orcein solution in 45%(w/v) acetic *** were made at room temperature(25 °C),and control cell samples were processed in the same *** assessed heterochromatin granule quantity(HGQ) at 600× *** irradiation at the intensity of.1 μW/cm2 produced no ef.ect,and irradiation at the intensities of.10 and 100 μW/cm2 induced an increase in *** intense irradiation induced more chromatin *** right-handed elliptically polarized radiation revealed more biological activity than the lef.-handed polarized one.

关键词： Human cells Chromatin Heterochromatin Electromagnetic f.eld Elliptical polarization