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Design of self-healing PEO-based protective layers containing in-situ grown LDh loaded with inhibitor on the MA8 magnesium alloy

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Journal of Magnesium and Alloys 2023年第10期11卷 3688-3709页

作者： A.s.Gnedenkov s.L.sinebryukhov A.D.Nomerovskii v.s.Filonina A.Yu.Ustinov s.v.Gnedenkov Institute of Chemistry of FEB RAs 159 Pr.100-letiya VladivostokaVladivostok690022Russia

the high corrosion rate of magnesium and its alloys in chloride-containing solution significantly reduces the potential of this material for diverse ***,the formation of a smart protective coating was achieved in this work to prevent degradation of the MA8 magnesium alloy.A porous ceramic-like matrix was obtained on the material by plasma electrolytic oxidation(PEO).Further surface functionalization was performed using layered double hydroxides(LDh) served as nanocontainers for the corrosion *** methods of LDh intercalation with benzotriazole(BtA) were *** composition and morphology of the formed coating were studied using sEM-EDX analysis,XRD,XPs,and Raman *** corrosion behavior of the coated samples was evaluated using electrochemical impedance spectroscopy and potentiodynamic *** corrosion rate was estimated using volumetry and gravimetry *** formed composite coating provides the Mg alloy with the lowest corrosion activity(|Z|_(f)=0.1 hz)=8.48·10^(5) Ω·cm^(2),I_(c)=1.4·10^(-8)A/cm^(2),P_(h)=0.21 mm/year) and improves the protective properties of the PEO-coated sample(|Z|_(f)=0.1 hz)=8.37·10^(3) Ω·cm^(2),I_(c)=4.1·10^(-7)A/cm^(2),P_(h)=0.31 mm/year).the realization of the self-healing effect of the inhibitor-containing LDh/PEO-coated system was studied using localized electrochemical methods(svEt and sIEt) with two artificial defects on the surface.A mechanism involving three stages for the active corrosion protection of the alloy was *** findings contribute to the follow-up work of developing modified LDh/PEO-based structures that promote the Mg alloy with high corrosion resistance,superior electrochemical performance for applications in various fields of industry and medicine.

关键词： Magnesium alloy Plasma electrolytic oxidation Layered double hydroxides Corrosion inhibitor Electrochemistry Corrosion rate

New approach to formation of coatings on Mg-Mn-Ce alloy using a combination of plasma treatment and spraying of fluoropolymers

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Journal of Magnesium and Alloys 2022年第4期10卷 1033-1050页

作者： D.v.Mashtalyar K.v.Nadaraia I.M.Imshinetskiy s.L.sinebryukhov s.v.Gnedenkov Institute of Chemistry FEB RAs 159 Pr.100-letiyaVladivostok 690022Russia Far Eastern Federal University 10 Ajax BayRussky IslandVladivostok 690922Russia

this paper presents a method of the formation of composite polymer-containing coatings on a Mg–Mn–Ce magnesium alloy by forming a ceramic-like layer using plasma electrolytic oxidation(PEO)and subsequent spraying superdispersed polytetrafluoroethylene *** coating composition and their morphological features were studied by sEM,EDs,GDOEs,and *** presented data confirm the embedding of fluoropolymer in the PEO *** evaluation of the corrosion properties of the formed composite polymer-containing coatings indicates a decrease in the corrosion current density by more than 3 orders of magnitude in comparison with the base PEO *** incorporation of a fluoropolymer in a PEO layer by more than 32%increases the load value at which abrasion of the coating to the substrate occurs and reduces the wear of the coating by more than 27 fold in comparison with the PEO *** has been established that composite coatings possess hydrophobic properties:the value of the contact angle attains 152°.

关键词： Plasma electrolytic oxidation Polytetrafluoroethylene Composite coatings Corrosion Wear superhydrophobicity

structure,magnetic and adsorption properties of novel FePt/h-BN heteromaterials

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Nano Research 2023年第1期16卷 1473-1481页

作者： Anton s.Konopatsky vladislava v.Kalinina Alena s.savchenko Denis.v.Leybo Ekaterina v.sukhanova viktor s.Baidyshev Zakhar I.Popov Andrey v.Bondarev Josef Polčák Dmitry v.shtansky National University of science and technology(MIsIs) Leninskiy prospect 4Moscow119049Russia Emanuel Institute of Biochemical Physics RAs Kosygina 4Moscow119334Russia Katanov Khakas state University 90 Lenin pr.655017 AbakanRussia Plekhanov Russian University of Economics 36 Stremyanny per.Moscow 117997Russia Department of Control Engineering Faculty of Electrical EngineeringCzech Technical University in PragueTechnicka 2Prague 16627Czech Republic CEItEC-Central European Institute of technology Brno University of TechnologyPurkyňova 123Brno 61200 BrnoCzech Republic

Nanomaterials with high specific surface area and high absorption capacity are attracting increased interest aimed at imparting the desired magnetic *** work is devoted to the study of the effect of heat treatment in a hydrogen atmosphere on the microstructure,adsorption and magnetic properties of heterogeneous FePt/h-BN *** via the polyol process,FePt nanoparticles(NPs)had a sizestributed over the surface of hexagonal boron nitride(h-BN)*** temperature-activated fcc→fct phase transformation in ultrafine FePt NPs has been well *** NPs act as active centers dissociating h2 molecules and transfer adsorbed hydrogen atoms to the *** functional theory(DFt)calculations also indicate that the h-BN substrate can absorb hydrogen adsorbed on the FePt *** hydrogen circulation in the FePt/h-BN system promoted the fcc→fct phase transformation and allowed to control the magnetic ***/h-BN nanomaterials also exhibited a high adsorption capacity with respect to various organic dyes.

关键词： FePt/h-BN nanomaterials polyol synthesis phase transformations magnetic properties adsorption

Electrochemical synthesis of boron-containing coatings on Mg alloy for thermal neutron shielding

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Journal of Magnesium and Alloys 2023年第10期11卷 3779-3789页

作者： K.v.Nadaraia s.N.suchkov N.s.Markin I.M.Imshinetskiy s.I.Ivannikov D.v.Mashtalyar A.Yu.Ustinov s.L.sinebryukhov s.v.Gnedenkov Institute of Chemistry FEB RAs 159 Pr.100-Letiya VladivostokaVladivostok 690022Russia

the work provides the results of the one-step formation of boron-containing coatings on an Mg–Mn–Ce alloy by plasma electrolytic oxidation. the results of studies of the composition, structure and morphology of heteroxide coatings are presented. It was established that the boron is contained in the coating mainly in the form of B or B_(2)O_(3). the introduction of B changes the color of coatings, and also helps to increase their porosity. the method of determining the full cross section of the interaction of thermal neutron absorption efficiency by samples material using the installation of neutron-activation analysis based on ^(252)Cf was developed. It was shown that the introduction of boron into the formed coatings allows to increase the macroscopic cross-section of the interaction of samples with thermal neutrons by 3.8 times. this effect opens the potential for the use of synthesized material in the field of nuclear technologies and aerospace industry.

关键词： Plasma electrolytic oxidation Boron Neutron capture Neutron shielding protective coatings

targeting epigenetic and posttranslational modifications regulating ferroptosis for the treatment of diseases

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signal transduction and targeted therapy 2024年第1期9卷 105-149页

作者： Yumin Wang Jing hu shuang Wu Joshua s.Fleishman Yulin Li Yinshi Xu Wailong Zou Jinhua Wang Yukuan Feng Jichao Chen hongquan Wang Department of Respiratory and Critical Care Medicine Aerospace Center HospitalPeking University Aerospace School of Clinical MedicineBeijing 100049PR China Department of Pathogen Biology School of Basic Medical SciencesTianjin Medical UniversityTianjin 300060PR China Department of Neurology Zhongnan Hospital of Wuhan UniversityWuhan 430000PR China Department of Pharmaceutical sciences College of Pharmacy and Health SciencesSt.John’s UniversityQueensNY 11439USA Department of Outpatient Aerospace Center HospitalPeking University Aerospace School of Clinical MedicineBeijing 100049PR China Beijing Key Laboratory of Drug target and screening Research Institute of Materia MedicaChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100050PR China Department of Pancreatic Cancer Tianjin Medical University Cancer Institute and HospitalNational Clinical Research Center for CancerTianjin’s Clinical Research Center for CancerKey Laboratory of Cancer Prevention and TherapyTianjin 300060PR China

Ferroptosis,a unique modality of cell death with mechanistic and morphological differences from other cell death modes,plays a pivotal role in regulating tumorigenesis and offers a new opportunity for modulating anticancer drug *** epigenetic modifications and posttranslational modifications(PtMs)promote anticancer drug resistance,cancer progression,and *** studies indicate that epigenetic modifications can transcriptionally and translationally determine cancer cell vulnerability to ferroptosis and that ferroptosis functions as a driver in nervous system diseases(NsDs),cardiovascular diseases(CvDs),liver diseases,lung diseases,and kidney *** this review,we first summarize the core molecular mechanisms of ***,the roles of epigenetic processes,including histone PtMs,DNA methylation,and noncoding RNA regulation and PtMs,such as phosphorylation,ubiquitination,sUMOylation,acetylation,methylation,and ADP-ribosylation,are concisely *** roles of epigenetic modifications and PtMs in ferroptosis regulation in the genesis of diseases,including cancers,NsD,CvDs,liver diseases,lung diseases,and kidney diseases,as well as the application of epigenetic and PtM modulators in the therapy of these diseases,are then discussed in *** the mechanisms of ferroptosis regulation mediated by epigenetic modifications and PtMs in cancer and other diseases will facilitate the development of promising combination therapeutic regimens containing epigenetic or PtM-targeting agents and ferroptosis inducers that can be used to overcome chemotherapeutic resistance in cancer and could be used to prevent other *** addition,these mechanisms highlight potential therapeutic approaches to overcome chemoresistance in cancer or halt the genesis of other diseases.

关键词： diseases epigenetic overcome

Combinatorial therapies for spinal cord injury repair

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Neural Regeneration Research 2025年第5期20卷 1293-1308页

作者： Carla s.sousa Andreia Monteiro António J.salgado Nuno A.silva Life and health sciences Research Institute(ICvs) School of MedicineUniversity of MinhoCampus de Gualtar-gualtarBragaPortugal ICvs/3B’s Associate Lab PT Government Associated LabCampus de Gualtar-gualtarBragaPortugal

spinal cord injuries have profound detrimental effects on individuals, regardless of whether they are caused by trauma or non-traumatic events. the compromised regeneration of the spinal cord is primarily attributed to damaged neurons, inhibitory molecules, dysfunctional immune response, and glial scarring. Unfortunately, currently, there are no effective treatments available that can fully repair the spinal cord and improve functional outcomes. Nevertheless, numerous pre-clinical approaches have been studied for spinal cord injury recovery, including using biomaterials, cells, drugs, or technological-based strategies. Combinatorial treatments, which target various aspects of spinal cord injury pathophysiology, have been extensively tested in the last decade. these approaches aim to synergistically enhance repair processes by addressing various obstacles faced during spinal cord regeneration. thus, this review intends to provide scientists and clinicians with an overview of pre-clinical combinatorial approaches that have been developed toward the solution of spinal cord regeneration as well as update the current knowledge about spinal cord injury pathophysiology with an emphasis on the current clinical management.

关键词： electric stimulation neural tissue regeneration neuroprotection polytherapy spinal cord injury

proposal for a nuclear light source

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Chinese Physics C 2023年第2期47卷 116-122页

作者： E.v.tkalya P.v.Borisyuk M.s.Domashenko Yu.Yu.Lebedinskii P.N.Lebedev Physical Institute of the Russian Academy of sciences 11999153 Leninskiy pr.MoscowRussia National Research Nuclear University MEPhI 115409Kashirskoe shosse 31MoscowRussia

this study considers a principal possibility of creating a nuclear light source of the vacuum ultra violet(vUv) range based on the ^(229)th *** nuclear light source can help solve two main problems—excitation of the low-lying^(229m)th isomer and precision measurement of the nuclear isomeric transition *** thorium nuclear light source is based on the nuclei implanted in a thin dielectric film with a large *** passing an electric current through the sample,the^(229)th nuclei are excited to the low energy isomeric state 3/2^(+)(8.19±0.12ev) through the process of inelastic scattering of conduction *** subsequent spontaneous decay of^(229m)th is followed by the emission of γ quanta in the vUv *** luminosity of the thorium nuclear light source is approximately 10^(5)photons/s per 1 A of current,per 1 ng of^(229)*** suggested scheme to obtain γ radiation from the^(229m)th isomer can be considered as a type of nuclear analogue of the optical radiation from the usual metal-insulator-semiconductor(MIs) junction.

关键词： th-229m excitation by electrons optical range gamma emission

Interface dominated deformation transition from inhomogeneous to apparent homogeneous mode in amorphous/amorphous nanolaminates

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Journal of Materials science & technology 2022年第4期99卷 178-183页

作者： Z.Q.Chen M.C.Li J.s.Cao F.C.Li s.W.Guo B.A.sun h.B.Ke W.h.Wang songshan Lake Materials Laboratory Dongguan 523808PR China Institute of Physics Chinese Academy of SciencesBeijing 100190PR China Institute of Materials Engineering Nanjing UniversityNantong 226019PR China school of Physics science and technology Xinjiang UniversityXinjiang 830046PR China school of Physical sciences University of Chinese Academy of SciencesBeijing 100049PR China state Key Laboratory for Mechanical Behavior of Material Xi'an Jiaotong UniversityXi’an 710049PR China

the amorphous/amorphous nanolaminates(A/ANLs)have aroused great attentions owing to their tunable structure and enhanced mechanical ***,the plastic deformation mechanism of A/ANLs have yet been ***,we systematically examined the mechanical properties and deformation behavior of series of NiNb/ZrCuNi Al A/ANLs via nanoindentaion *** was found that both the amount and morphology of amorphous/amorphous interface(A/AIs)played crucial roles in the plastic deformation of A/*** and straighter A/AIs facilitated multiple shear banding deformation,of which the hardness increased with decreasing layer thickness,as the A/AIs hindered the propagation of shear bands(sBs).Whilst,more and wavier A/AIs promoted homogeneous deformation,of which the hardness stayed at a much lower value and was relatively irrelevant with the layer thickness,for the promoted activation of shear transformation zones by A/*** results provide guidance for modifying the mechanical properties of amorphous alloys with interface engineering design.

关键词： Amorphous alloys Nanolaminates shear bands hardness Interface

A-site ordered state in manganites with perovskite-like structure based on optimally doped compounds Ln0.70Ba0.30MnO3（Ln=pr,Nd）

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Journal of Rare Earths 2019年第11期37卷 1242-1249页

作者： s.v.trukhanov vA Khomchenko D.v.Karpinsky M.v.silibin A.v.trukhanov L.s.Lobanovsky h.szymczak C.E.Botez I.O.troyanchuk National University of science and technology MIsis 119049 MoscowLeninsky Av.4Russia south Ural state University 454080 ChelyabinskLenin Av.76Russia scientific-practical Materials Research Centre of NAsB 220072 MinskBelarus CFisUC Department of PhysicsUniversity of Coimbra3004-516 CoimbraPortugal National Research University of Electronic technology"MIEt 124498 ZelenogradMoscowRussia Institute for Bionic technologies and Engineering I.M.Sechenov First Moscow State Medical University2-4 Bolshaya Pirogovskaya St.119991 MoscowRussia Institute of Physics Polish Academy of Sciences02-668 WarsawPoland the University of texas at El Paso El PasoTX 79968-0515USA

In this paper,we report on the crystal structure and magnetic properties of the nano structured Baordered phases of rare-earth manganites obtained from the optimally doped solid solutions Ln0.70Ba0.30MnO3(Ln=pr,Nd).the materials were studied by X-ray diffraction,scanning electron microscopy,energy dispersive spectroscopy and sQUID-magnetometry *** is found that states with different degrees of cation ordering in the A-sublattice of the ABO3 perovskite can be obtained by employing special conditions of chemical *** particular,reduction of the parent compounds results in the formation of a nanocomposite containing ferrimagnetic anion-deficient ordered phase *** of the composite does not change an average size of the nanocrystallites,but drastically alters their phase composition to stabilize ferromagnetic stoichiometric ordered phase LnBaMn2O6 and ferromagnetic superstoichiometric disordered phase Ln0.90Ba0.10MnO3+δ.It is shown that the magnetic properties of the materials are determined by the joint action of chemical(cation ordering)and external(surface tension)pressures.

关键词： Ionic order Magnetic transition Perovskite Manganite Rare earths