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Electrochemical performance of Klason lignin as a low-cost cathode-active material for primary lithium battery

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Journal of Energy Chemistry 2015年第3期24卷 346-352页

作者： sergey V Gnedenkov Denis P Opra ludmila A Zemnukhova sergey l sinebryukhov Iliya A Kedrinskii Olga V Patrusheva Valentin I Sergienko Institute of Chemistry Far Eastern BranchRussian Academy of Sciences Far Eastern Federal University Siberian State Technological University

A few classes of organic compounds are promising electrode-active materials due to their high power and energy densities,low cost,environmental friendliness,and *** the present work,the possibility of using Klason lignin extracted from buckwheat husks as a cathode-active material for a primary lithium battery has been investigated for the first *** reaction mechanism in the lithium/lignin electrochemical cell was suggested based on the deep galvanostatic discharge（up to 0.005 V） data and cyclic voltammetry *** dependence of the electrochemical behavior of the Klason lignin on the milling degree was *** maximum specific capacity of the lignin is equal to 600 m Ah g-1at a discharge current density of 75 μA *** effect of the thermal treatment of the Klason lignin cathode at250°C on the cell performance was *** was found that the discharge capacity of the cell increased by 30% in the range from 3.3 to0.9 V for the treated cathode *** results demonstrate the prospects of using Klason lignin-based electrochemical cells as low-rate primary power sources.

关键词： Klason lignin primary lithium battery organic electrode buckwheat husks

Zr4+/F~– co-doped TiO2(anatase) as high performance anode material for lithium-ion battery

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Progress in Natural Science:Materials International 2018年第5期28卷 542-547页

作者： Denis P.Opra sergey V.Gnedenkov sergey l.sinebryukhov Elena I.Voit Alexander A.Sokolov Alexander Yu.Ustinov Veniamin V.Zheleznov Institute of Chemistry Far Eastern Branch of Russian Academy of Sciences Far Eastern Federal University

Zr4+and F~– co-doped TiO2with the formula of Ti0.97Zr0.03O1.98F0.02was facilely synthesized by a sol-gel template *** crystal structure,morphology,composition,surface area,and conductivity were characterized by Raman spectroscopy,energy-dispersive X-ray analysis,scanning electron microscopy,Brunauer-Emmett-Teller measurements,X-ray photoelectron spectroscopy,and electrochemical impedance *** results demonstrate that Zr4+and F~–homogeneously incorporated into TiO2,forming solid solution with an anatase ***0.97Zr0.03O1.98F0.02shows outstanding electrochemical properties as li-ion battery anode in comparison with *** particular,upon 35-fold cycling at 1C-rate Zr4+/F~–co-doped TiO2delivers a reversible capacity of 163 mAh g–1,whereas Zr4+-doped TiO2gives only 34 mA h g–***,Zr4+/F~–co-doped TiO2retains a capacity of 138 mA h g–1during cycling even at 10 *** enhance performance originates from improved conductivity of Zr4+/F~–co-doped TiO2material through generation of Ti3+(serving as electron donors)into the crystal lattice and,possibly,due to F-doping blocked the anode surface from attack of HF formed as electrolyte decomposition product.

关键词： li-ion batteries TiO2(anatase) Anode Co-doping Sol-gel template Process Electrochemical performance

Characterization and Electrochemical Properties of Nanostructured Zr-Doped Anatase TiO_2 Tubes Synthesized by Sol–Gel Template Route

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Journal of Materials Science & Technology 2017年第6期33卷 527-534页

作者： Denis P.Opra sergey V.Gnedenkov sergey l.sinebryukhov Elena I.Voit Alexander A.Sokolov Evgeny B.Modin Anatoly B.Podgorbunsky Yury V.Sushkov Veniamin V.Zheleznov Institute of Chemistry Far Eastern Branch of Russian Academy of Sciences Far Eastern Federal University National Research Centre "Kurchatov Institute"

A series of nanostructured Zr-doped anatase TiO_2 tubes with the Zr/Ti molar ratio of 0.01, 0.02, 0.03, and0.09 were prepared by a sol–gel technology on a carbon fiber template. The electrochemical performance of Zr-doped anatase TiO_2 as anodes for rechargeable lithium batteries was investigated and compared with undoped titania. Tests represented that after 35-fold charge/discharge cycling at C/10 the reversible capacity of Zr-doped titania（Zr/Ti = 0.03） reaches 135 m A h g^（-1）, while the capacity of undoped titania（Zr/Ti = 0） yielded only 50 m A h g^（-1）. Based on the results of the physicochemical investigation, three reasons of improving electrochemical performance of Zr-doped titania were suggested. According to the scanning electron microscopy and transmission electron microscopy, Zr^（4＋） doping induces a decrease in nanoparticle size, which facilitates the li＋diffusion. The Raman investigations show the more open structure of Zr-doped TiO_2 as compared to undoped titania due to changing of the unit cell parameters, that significantly affects on the reversibility of the insertion/extraction process. The electrochemical impedance spectroscopy results indicate that substitution of Zr^（4＋） for Ti^（4＋） into anatase TiO_2 has favorable effects on the conductivity.

关键词： li-ion batteries Anatase titania Nanostructured materials Sol–gel template process Doping Electrochemical performance

Effect of Ta_(2)O_(5)nanoparticles on bioactivity,composition,structure,in vitro and in vivo behavior of PEO coatings on Mg-alloy

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Journal of Magnesium and Alloys 2024年第6期12卷 2360-2379页

作者： D.V.Mashtalyar I.M.Imshinetskiy V.V.Kashepa K.V.Nadaraia M.A.Piatkova A.I.Pleshkova K.A.Fomenko A.Yu.Ustinov S.l.sinebryukhov S.V.Gnedenkov Institute of Chemistry Far Eastern BranchRussian Academy of SciencesVladivostok690022Russia Far Eastern Federal University Vladivostok690950Russia Regional Clinical Dermatovenerological Dispensary Vladivostok690033Russia

The present study investigates the physical and chemical characteristics,behavior in vitro and in vivo,and biocompatibility of coatings containing Ta_(2)O_(5),which are obtained by plasma electrolytic oxidation(PEO)on MA8 magnesium *** obtained coatings demonstrate in vivo biocompatibility and in vitro *** to the base PEO coating,the layers containing Ta_(2)O_(5)facilitate the development of apatite in simulated body fluid,suggesting that the inclusion of nanoparticles improves bioactivity of the *** was found that incorporation of Ta_(2)O_(5)nanoparticles increases roughness and porosity of the formed layers by increasing particle concentration in electrolytes for the PEO process contributing to sufficient soft tissue ingrowth in *** on in vivo studies,these coatings also provide favorable tissue response and minimal inflammatory reaction in comparison with the bare magnesium alloy due to protection of living tissues from deleterious corrosion events of magnesium implant such as local alkalization and intense hydrogen *** results obtained in the present study concluded biocompatibility,tissue integration of the PEO coatings containing Ta_(2)O_(5)nanoparticles making them a promising protective layer for biodegradable magnesium implants.

关键词： Plasma electrolytic oxidation Bioactive coatings Tantalum pentoxide Simulated body fluid(SBF) Apatite formation Histology

Effectiveness of serological markers of gastric mucosal atrophy in the gastric precancer screening and in cancer prevention

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World Journal of Gastrointestinal Endoscopy 2024年第8期16卷 462-471页

作者： sergey M Kotelevets sergey A Chekh sergey Z Chukov Department of Therapy North Caucasus State AcademyCherkessk 369000Karachay-Cherkess RepublicRussia Department of Mathematics North Caucasus State AcademyCherkessk 369000Karachay-Cherkess RepublicRussia Department of Pathological Anatomy Stavropol State Medical UniversityStavropol 355017Russia

BACKGROUND New markers are needed to improve the effectiveness of serological screening for atrophic *** To develop a cost-effective method for serological screening of atrophic gastritis with a high level of *** Of the 169 patients with atrophic gastritis,selected by the visual endoscopic Kimura-Takemoto method,165 showed histological mucosal atrophy using the updated Kimura-Takemoto *** 169 patients were examined for postprandial levels of gastrin-17(G17)and pepsinogen-1(PG1)using Gastro-Panel®(Biohit Plc,Helsinki,Finland).RESUlTS We used the histological standard of five biopsies of the gastric mucosa,in accordance with the Kimura-Takemoto classification system to assess the sensitivity of G17 in detecting gastric mucosal *** also compared the morphofunctional relationships between the detected histological degree of gastric mucosal atrophy and the serological levels of G17 and PG1,as the markers of atrophic *** sensitivity of postprandial G17 was 62.2%for serological levels of G17(range:0-4 pmol/l)and 100%for serological G17(range:0-10 pmol/l)for the detection of monofocal severe atrophic *** strong correlation was found between the levels of PG1 and degree of histological atrophy determined by the Kimura-Takemoto classification system to identify the severity of mucosal atrophy of the gastric *** the presented clinical case of a 63-year-old man with multifocal atrophic gastritis,there is a pronounced positive long-term dynamics of the serological marker of atrophy-postprandial G17,after five months of rennet replacement *** Serological screening of multifocal atrophic gastritis by assessment of postprandial G17 is a cost-effective method with high *** G17 is an earlier marker of regression of atrophic gastritis than a morphological examination of a gastric biopsy in accordance with the Sydney ***,postprandial G17 is recommended for dynamic monitorin

关键词： Updated Sydney system Kimura-Takemoto classification Prevention Gastric cancer Atrophic gastritis Gastrin-17 Pepsonogen-1

Antibacterial HA-coatings on bioresorbable Mg alloy

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Journal of Magnesium and Alloys 2024年第5期12卷 1965-1985页

作者： K.V.Nadaraia D.V.Mashtalyar M.A.Piatkova A.I.Pleshkova I.M.Imshinetskiy M.S.Gerasimenko E.A.Belov V.V.Kumeiko D.N.Kozyrev K.A.Fomenko V.V.Mostovaya B.R.Torpanov A.R.Biktimirov I.S.Osmushko S.l.sinebryukhov S.V.Gnedenkov Institute of Chemistry FEB RAS 159 Pr.100-letiya VladivostokaVladivostok 690022Russia Far Eastern Federal University 10 Ajax BayRussky IslandVladivostok 690922Russia A.V.Zhirmunsky National Scientific Center of Marine Biology FEB RAS 17 St.PalchevskogoVladivostok 690041Russia Regional Clinical Dermatovenerological Dispensary 18 V St.GamarnikaVladivostok 690033Russia NMIC“Treatment and Rehabilitation Center” 3 Ivankovskoe highwayMoscow 125367Russia

In this study,a calcium-phosphate coating was formed on a Mg-Mn-Ce alloy by the plasma electrolytic oxidation(PEO).The antibiotic vancomycin,widely used in the treatment of infections caused by Staphylococcus aureus(***),was impregnated into the *** with vancomycin showed high bactericidal activity against *** mechanical and electrochemical properties of the formed coatings were studied,as well as in vitro cytotoxicity tests and in vivo tests on mature male rats were *** to SEM,EDS,XRD and XPS data,coatings had a developed morphology and contained hydroxyapatite,which indicates high *** analysis of roughness of coatings without and with vancomycin did not reveal any differences,confirming the high roughness of the *** electrochemical tests,an increase in corrosion resistance by more than two times after the application of PEO coatings was *** to the results of an in vivo study,after 28 days of the implantation of samples with calcium phosphate PEO coating and vancomycin,no signs of inflammation were observed,while an inflammatory reaction developed in the area of implantation of bare alloy,followed by *** release tests from the coatings show a sharp decrease in the concentration of the released antibiotic on day 7 and then a gradual decrease until day *** the experiment,no significant deviations in the condition and behavior of the animals were observed;clinical tests did not reveal a systemic toxic reaction.

关键词： Bioactive coatings Biocompatibility Mg alloy Plasma electrolytic oxidation Hydroxyapatite Vancomycin

Dynamics and cytokinic regulation of immune cell infiltration in genetically engineered mouse models of pancreatic cancer dictate the sensitivity to immunotherapy

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Cancer Communications 2024年第1期44卷 178-182页

作者： Okan Safak Shenghan Wang Carmen Mota Reyes Ibrahim Halil Gürcinar sergey Tokalov Nedim Can Cevik Kivanc Görgülü Bengi Su Yilmaz Emre Erdogan linhan Ye Qiaolin li Elif Arik Sever SamedÖzer Güldal Süyen Helmut Friess Güralp Onur Ceyhan Rouzanna Istvanffy Hana Algül Ihsan Ekin Demir Department of Surgery Klinikum rechts der IsarTechnical University of MunichSchool of MedicineMunichBavariaGermany Department of General Surgery HPB-UnitSchool of MedicineAcibadem Mehmet Ali Aydinlar UniversityIstanbulIstanbulTurkey Comprehensive Cancer Center München Klinikum rechts der IsarTechnical University of MunichSchool of MedicineMunichBavariaGermany Department of Hematology Oncology and Tumor ImmunologyCharitéUniversity Medicine BerlinCampus Virchow ClinicBerlinBerlinGermany Graduate School of Health Sciences Acibadem Mehmet Ali Aydinlar UniversityIstanbulIstanbulTurkey Department of Physiology Acibadem Mehmet Ali Aydinlar UniversityIstanbulIstanbulTurkey Else Kröner Clinician Scientist Professorship for Translational Pancreatic Surgery MunichGermany Neural Influences in Cancer(NIC)International Research Consortium MunichGermany

Dear Editor,Targeting the immune compartment in pancreatic duc-tal adenocarcinoma(PDAC)holds promise for prognostic improvement,yet our knowledge on the spatial and tem-poral dynamics and the molecular modulators of t... 详细信息

关键词： immune adenocarcinoma immunotherapy

Hydroxyapatite-containing PEO-coating design for biodegradable Mg-0.8Ca alloy: Formation and corrosion behaviour

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Journal of Magnesium and Alloys 2023年第12期11卷 4468-4484页

作者： A.S.Gnedenkov S.l.sinebryukhov V.S.Filonina S.V.Gnedenkov Institute of Chemistry of FEB RAS 159 Pr.100-letiya VladivostokaVladivostok690022Russian Federation

In this study, the biocompatible protective coating was formed using plasma electrolytic oxidation(PEO) on bioresorbable Mg-0.8Ca alloy. The composition of the formed coating was studied using XRD, SEM-EDX analysis, and micro-Raman spectroscopy. The uniform distribution of hydroxyapatite over the thickness of protective PEO-layer was established. Using traditional(EIS, PDP, OCP) and local scanning electrochemical methods(SVET, SIET with H^(+)-selective microelectrode), the level of protective properties of PEO-layer in a biological environment(mammalian cell culture medium, MEM) was determined. It was established that modification of Mg-0.8Ca alloy surface by PEO contributes to a significant increase in the corrosion resistance of the surface layer, making it possible to control the process of material‘s biodegradation. The maximum local electrochemical activity was recorded after 72 h of testing, while for the uncoated sample,intense corrosion degradation was recorded in the first 12 min of exposure to the cell culture medium. Formation of the PEO-coating results in a twofold decrease in the corrosion current density(2.8·10^(-6)A cm^(-2)) and an increase in the impedance modulus measured at a low frequency(1.7·10^(4)Ω cm^(2)) in comparison with the uncoated material(9.5·10^(-6)A cm^(-2);8.1·10^(3)Ω cm^(2)). The mechanism of material bioresorption was established and a model for biodegradation process of Mg-0.8Ca alloy with hydroxyapatite-containing PEO-coating in MEM was proposed. Analysis of these results and comparing with others obtained by various scientific groups indicate the prospects for application of biocompatible PEO-coating on Mg-Ca alloy in implant surgery.

关键词： Magnesium-calcium alloy Biodegradation Implant surgery Plasma electrolytic oxidation Electrochemistry Minimum essential medium Hydroxyapatite

Polariton lasing in Mie-resonant perovskite nanocavity

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Opto-Electronic Advances 2024年第4期7卷 27-42页

作者： Mikhail A.Masharin Daria Khmelevskaia Valeriy I.Kondratiev Daria I.Markina Anton D.Utyushev Dmitriy M.Dolgintsev Alexey D.Dmitriev Vanik A.Shahnazaryan Anatoly P.Pushkarev Furkan Isik Ivan V.Iorsh Ivan A.Shelykh Hilmi V.Demir Anton K.Samusev sergey V.Makarov UNAM-Institute of Materials Science and Nanotechnology National Nanotechnology Research CenterDepartment of Electrical and Electronics EngineeringDepartment of PhysicsBilkent UniversityAnkara 06800Turkey ITMO University School of Physics and EngineeringSt.Petersburg 197101Russia Abrikosov Center for Theoretical Physics MIPTDolgoprudnyiMoscow Region 141701Russia lUMINOUS!Center of Excellence for Semiconductor lighting and Displays School of Electrical and Electronic EngineeringSchool of Physical and Mathematical SciencesSchool of Materials Science and EngineeringNanyang Technological UniversitySingapore 639798Singapore Department of Physics Engineering Physics and AstronomyQueen’s UniversityKingstonOntario K7L 3N6Canada Science Institute University of IcelandDunhagi 3IS-107ReykjavikIceland Experimentelle Physik 2 Technische Universität DortmundDortmund 44227Germany Qingdao Innovation and Development Center Harbin Engineering UniversityQingdao 266000China

Deeply subwavelength lasers(or nanolasers)are highly demanded for compact on-chip bioimaging and sensing at the *** of the main obstacles for the development of single-particle nanolasers with all three dimensions shorter than the emitting wavelength in the visible range is the high lasing thresholds and the resulting *** we ex-ploit exciton-polariton condensation and mirror-image Mie modes in a cuboid CsPbBr3 nanoparticle to achieve coherent emission at the visible wavelength of around 0.53μm from its ultra-small(≈0.007μm3 or≈λ3/20)semiconductor *** polaritonic nature of the emission from the nanocavity localized in all three dimensions is proven by direct com-parison with corresponding one-dimensional and two-dimensional waveguiding systems with similar material *** a deeply subwavelength nanolaser is enabled not only by the high values for exciton binding energy(≈35 meV),re-fractive index(>2.5 at low temperature),and luminescence quantum yield of CsPbBr3,but also by the optimization of po-laritons condensation on the Mie resonances with quality factors improved by the metallic ***,the key parameters for optimal lasing conditions are intermode free spectral range and phonons spectrum in CsPbBr3,which govern polaritons condensation *** chemically synthesized colloidal CsPbBr3 nanolasers can be potentially de-posited on arbitrary surfaces,which makes them a versatile tool for integration with various on-chip systems.

关键词： nanolaser perovskite polariton Mie resonance exciton-polariton