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RbC aggregation,deformation and adhesion to endothelium:Role of nitric oxide derived from L-Arginine and sodium nitroprusside

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Journal of Innovative optical Health sciences 2024年第5期17卷 53-65页

作者： M.K.Maksimov p.b.ermolinskiy o.n.scheglovitova n.n.sklyankina A.v.Muravyov A.e.Lugovtsov A.v.priezzhev Faculty of physics M.V.Lomonosov Moscow State University bld.1subbuilding.2Leninskie goryMoscow 11991Russia n.F.gamaleya national Research Center for epidemiology and Microbiology 18 Gamaleya StreetMoscow 123098Russia K.D.Ushinsky Yaroslavl state pedagogical University 108/1 Respublikanskaya StreetYaroslavl 150000Russia

Red blood cells(RbCs)are the most abundant human blood *** aggregation and deformation strongly determine blood viscosity which impacts hemorheology and *** turn,RbC properties depend on di®erent endogenous and exogenous *** such factor is nitric oxide(no),which is mainly produced by endothelial cells(eC)from L-arginine amino acid in the circulatory *** the mechanisms of the RbC-endothelium interplay are not clear up to date and considering its possible clinical importance,the aims of this study are to investigate in vitro:(1)The e®ect of L-arginine induced no on RbC aggregation and adhesion to endothelium;(2)the no e®ect on RbC aggregation and deformation induced by L-arginine and sodium nitroprusside without the presence of endothelium in the *** RbC aggregation and adhesion to a monolayer of eC were studied using optical tweezers(oT).The RbC deformability and aggregation without endothelium in the samples were studied using the°ow chamber method and Myrenne *** con¯rmed that no increases deformability and decreases aggregation of *** showed that the soluble guanylate cyclase pathway appears to be the only no signaling pathway *** the samples with the endothelium,the\bell-shaped"dependence of RbC aggregation force on L-arginine concentration was observed,which improves our knowledge about the process of no production by ***,data related to L-arginine accumulation by endothelium were obtained:necessity of the presence of extracellular L-arginine stated by other authors was put under *** our study,no decreased the RbC-endothelium adhesion,however,the tendency appeared to be weak and was not con¯rmed in another set of *** our knowledge,this is the¯rst attempt to measure the forces of RbC adhesion to endothelium monolayer with oT.

关键词： Red blood cells aggregation L-arginine endothelium optical tweezers Myrenne flow chamber

Measurement of yields and angular distributions ofγ-quanta from the interaction of 14.1 Mev neutrons with oxygen,phosphorus,and sulfur

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Chinese physics C 2024年第3期48卷 79-92页

作者： D.n.grozdanov n.A.Fedorov s.b.Dabylova yu.n.Kopatch I.n.Ruskov v.R.skoy T.yu.Tretyakova C.Hramco p.I.Kharlamov g.v.pampushik p.g.Filonchik A.v.Andreev Joint Institute for nuclear Research(JInR) DubnaRussia Institute for nuclear Research and nuclear energy Bulgarian Academy of SciencesSofiaBulgaria Faculty of physics Lomonosov Moscow State UniversityMoscowRussia L.n.gumilyov eurasian national University AstanaKazakhstan skobeltsyn Institute of nuclear physics Moscow State UniversityMoscowRussia Institute of Chemistry of Moldova ChisinauRepublic of Moldova Moscow Institute of physics and Technology MoscowRussia

A study of the inelastic scattering of neutrons with an energy of 14.1 Mev on the nuclei of oxygen,phosphorus,and sulfur was performed at the TAngRA facility at JInR(Dubna).The experiment aimed to refine existing data and obtain new data on the yields and angular distributions ofγ-quanta emitted by the studied nuclei due to neutron-induced nuclear reactions using the tagged neutron *** types of detector systems were used to registerγ-***γ-ray yields were measured using a high-purity germanium(Hpge)*** angular distributions ofγ-rays were obtained using a system of 18 scintillation detectors based on bismuth germanite bi_(4)ge_(3)o_(12)(bgo)located around the *** performed experiments measured the yields of two transitions for the reaction of tagged neutrons with 16o,nine transitions for the reaction with ^(31)p,and nine transitions for the reaction with ^(32)s for the first *** angular anisotropy of theγ-radiation accompanying the inelastic scattering of neutrons with an energy of 14.1 Mev on ^(31)p nuclei was also measured for the first time.

关键词： tagged neutron method yields of gamma-quanta high-resolution gamma-spectrometry neutron-nuclear reactions neutron scattering

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

exploring one material for dual applications:A red-emitting Mg_(2)geo_(4):eu^(3+)nanophosphor for future generation energy efficient WLeDs and dosimetric applications

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Journal of Rare earths 2024年第10期42卷 1835-1845页

作者： Akshay Arjun g.p.Darshan s.C.sharma H.nagabhushana D.v.sunitha H.b.premkumar Department of physics Faculty of Mathematical and Physical SciencesM.S.Ramaiah University of Applied SciencesBengaluru560054India Honorary professor of Law and Forensic Materials Jain UniversityBengaluru560069India C.n.R.Rao Centre for Advanced Materials Tumkur UniversityTumkur572103India school of Applied sciences(physics) REVA UniversityBengaluru560064India

The envisaged design and developme nt of individual mate rials to excavate a broader spectrum of desired properties and offer multiple applications are highly *** this in mind,a series of forsterite-structured Mg_(2)geo_(4):eu^(3+)(1 mol%-9 mol%)nanophosphors was synthesized via a solution combustion method using oxalyl dihydrazide as a *** X-ray diffraction patterns confirm the orthorhombic crystal system with a puma space *** results clearly show irregularly shaped cluster-like structures with aggregation of the *** diffuse reflectance spectra,the optical energy band gap of the Mg_2geo_4:eu^(3+)(1 mol%-9 mol%)nanophosphors was estimated and obtained to be~4.12-4.32 *** photoluminescence emission spectra exhibit intense peaks at~579,589,610,661,and 707 nm,which are due to characteristic~5D_(0)→~7F_(0),~5D_(0)→~7F_(1),~5Do→~7F_(2),~5D_(0)→~7F_(3)and~5D_(0)→~7F_(4)transitions of eu^(3+)ions,*** Commission International de L'eclairage color coordinates are gradually tuned from pale red(0.5980,0.4012)to a pure red(0.6385,0.3611)*** glow peaks showcase excellent super-linear response at low doses ofγ-irradiations,indicating that the prepared phosphor can be used in thermoluminescent personal dosimetry which is a biological tissue *** aforementioned results demonstrate that the prepared Mg_2geo_4:eu^(3+)(1 mol%-9 mol%)nanophosphors are considered an excellent candidate for dual applications,i.e.,red component in future generation white-light-emitting diodes(WLeDs)and personal dosimetric applications.

关键词： nanophosphors photoluminescence Thermoluminescence Dosimetry photometric properties Rare earths

Highly Defective Dark Tio_(2) Modified with pt: effects of precursor nature and preparation Method on photocatalytic properties

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Transactions of Tianjin University 2024年第2期30卷 198-209页

作者： e.D.Fakhrutdinova o.A.Reutova T.A.bugrova I.yu.ovsyuk L.s.Kibis o.A.stonkus D.b.vasilchenko o.v.vodyankina v.A.svetlychnyi national Research Tomsk state University TomskRussia 634050 novosibirsk state University NovosibirskRussia 630090 boreskov Institute of Catalysis NovosibirskRussia 630090 nikolaev Institute of Inorganic Chemistry NovosibirskRussia 630090

The study focused on the modification with platinum of dark defective titania obtained via pulsed laser ablation. both the method of pt introduction and the nature of the pt precursor were varied. All samples exhibited similar phase compositions, specific surface areas, and pt contents. High-resolution transmission electron microscopy coupled with pulsed Co adsorption revealed increased dispersity when photoreduction and the hydroxonitrate complex (Me _(4) n) _(2) [pt _(2) (oH) _(2) (no _(3) ) _(8) ] were used. The sample featured a high content of single-atom species and subnano-sized pt clusters. The X-ray photoelectron spectroscopy results showed that the photoreduction method facilitated the appearance of a larger number of pt ^(2+) states, which appeared owing to the strong metal-support interaction (sMsI) eff ect of the transfer of electron density from the electron-saturated defects on the Tio _(2) surface to pt ^(4+) . In the hydrogen evolution reaction, samples with a significant fraction of the pt ^(2+) ionic component, capable of generating short-lived pt^(0) single-atom sites under irradiation due to the sMsI eff ect, exhibited the highest photocatalytic activity. The 0.5pt(C)/Tio_(2) -ph sample exhibited the highest hydrogen yield with a quantum efficiency of 0.53, retaining its activity even after 8 h of operation.

关键词： Dark(black)Tio_(2) pulsed laser ablation platinum reduction method precursor type photocatalysis Hydrogen evolution reaction

plasma electrolytic formation and characterization of MnWo_(4)/Wo_(3) film heterostructures

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ChemPhysMater

ChemphysMater 2024年第3期3卷 293-302页

作者： M.s.vasilyeva I.v.Lukiyanchuk yu.b.budnikova v.g.Kuryavyi D.H.shlyk g.A.Zverev Department of Chemistry and Materials of Institute of High Technology and Advanced Materials Far Eastern Federal UniversityFEFU CampusVladivostok 690922Russia Institute of Chemistry Far Eastern BranchRussian Academy of SciencesVladivostok 690022Russia

MnWo_(4)/Wo_(3) p-n heterojunction films were fabricated using a one-step method consisting of the plasma electrolytic oxidation(peo)of titanium in homogeneous electrolytes containing paratungstate ions and stable watersoluble eDTA-chelated *** influences of the formation current density and W:Mn molar ratio of the electrolyte,which was varied from 1:2 to 2:1,on the composition,morphology,and optical and photocatalytic properties of the resulting coatings were studied.X-ray diffraction analysis,scanning electron microscopy,energy dispersive X-ray analysis,Raman spectroscopy,and ultraviolet diffuse reflectance spectroscopy were used to characterize the formed *** of the W:Mn ratio of the electrolyte,the coatings contained crystalline t-Wo_(3) and m-MnWo_(4).Depending on the formation conditions,the optical band gap energies of the composites varied from 2.63 to 3.01 *** largest absorption red shift and lowest band gap energy were observed in the film composite formed in an electrolyte with W:Mn=2:1,at a current density of 0.2 A cm^(−2).Composites obtained in electrolytes with W:Mn ratios of 2:1 and 1:1 exhibited photocatalytic activity in the degradation of rhodamine C and methyl orange dyes in the presence of 10 mmol L^(–1) H2o_(2) under ultraviolet and visible light *** role of hydrogen peroxide in this dye degradation on peo-coated composites under light irradiation is discussed.

关键词： plasma electrolytic oxidation Manganese tungstate Tungsten oxide Titanium optical properties p-n heterojunction

prompt neutron emission in ^(250)no spontaneous fission associated with ground and isomeric state decays

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Chinese physics C 2024年第6期48卷 112-117页

作者： R.s.Mukhin A.v.Isaev A.v.Andreev M.L.Chelnokov v.I.Chepigin H.M.Devaraja I.n.Izosimov A.A.Kuznetsova o.n.Malyshev A.g.popeko yu.A.popov A.Rahmatinejad b.sailaubekov T.M.shneidman e.A.sokol A.I.svirikhin M.s.Tezekbayeva M.A.bychkov A.v.Yeremin o.Dorvaux b.gall K.Kessaci K.Hauschild A.Lopez-Martens Joint Institute for nuclear Research Dubna141980Russia Dubna state University Dubna141982Russia Institute of nuclear physics Almaty050032Kazakhstan L.n.gumilyov eurasian national University Astana010008Kazakhstan Kazan Federal University Kazan420008Russia Universitéde strasbourg CNRSStrasbourg67000France IJCLab IN2P3-CNRSUniversitéParis-SaclayOrsay91400France

The complete-fusion reaction^(204)pb(^(48)Ca,2n)^(250)no was used to study two activities of^(250)no with distinct half-lives.A total of 1357 events were observed in the sFinx neutron detection *** average number of neutrons emitted per spontaneous fission of^(250)no was determined to be(4.1±0.1).The unusually symmetrical shape of the prompt neutron multiplicity distribution was restored and presented for the first *** tests were performed to compare the prompt neutron multiplicity distributions associated with the ground state and K-isomer state decays.

关键词： spontaneous fission prompt neutrons actinide

sAnC Monte Carlo programs for small-angle bhabha scattering

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Chinese physics C 2024年第4期48卷 14-19页

作者： A.b.Arbuzov s.g.bondarenko I.R.boyko L.v.Kalinovskaya A.A.Kampf R.R.sadykov v.L.Yermolchyk bogoliubov Laboratory of Theoretical physics JINRDubna141980 Russia Dzhelepov Laboratory of nuclear problems JINRDubna141980 Russia Dubna state University Dubna141982 Russia

Luminosity monitoring at e^(+)e^(−)colliders was investigated using sAnC Monte Carlo event generator RenesAnCe and integrator MCsAnC for simulation of bhabha scattering at low *** are presented for center-of-mass energies of the Z boson resonance and at 240 gev for the conditions of typical luminosity *** is shown that bremsstrahlung events with extremely low electron scattering angles are relevant to match the precision tags of future electron-positron colliders.

关键词： luminosity bhabha scattering QeD Monte Carlo simulation

Microstructure， electrochemical， wear and corrosive wear performance of laser-based powder bed fusion(lpbf) and wrought biomedical Ti-6Al-4v alloys

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Transactions of nonferrous Metals society of China 2024年

作者： A.g.Lekatou b.v.efremenko v.Haoui v.g.efremenko s.emmanouilidou v.I.Zurnadzhy I.petryshynets yu.g.Chabak I.I.sili Laboratory of Applied Metallurgy， Department of Materials science and engineering， school of engineering， University of Ioannina Institute of Materials science and Computing， University Research Center of Ioannina (URCI) pryazovskyi state Technical University， Department of physics Institute of Materials Research of slovak Academy of sciences

Wrought and laser powder bed fusion （LpbF） Ti-6Al-4v specimens were comparatively evaluated， with the objective to determine LpbF Ti-6-4’s suitability for biomedical applications. Testing included nanoindentation， cyclic polarization in simulated body fluid （sbF， 37 ℃ ）， and dry and sbF “ball-on-plate” sliding. Wrought Ti-6-4 exhibited a lamellar （α+β） microstructure， whereas LpbF displayed a fine-grained α'-martensite microstructure. LpbF Ti-6-4 demonstrated ～3% higher indentation modulus and ～32% higher hardness， while wrought Ti-6-4 showed ～8% higher plasticity. both alloys exhibited low corrosion rates (10–5mA/cm2order) and true passivity (10–4mA/cm2order). no localized corrosion was observed in either alloy， except for occasional metastable pitting in the LpbF alloy. However， LpbF Ti-6-4 presented higher corrosion rate and passive current， ascribed to its martensitic structure. During dry sliding， LpbF Ti-6-4 exhibited ～14% lower volume loss compared to wrought Ti-6-4. sliding in sbF increased volume losses for both alloys， with wear resistances nearly equalized， as the advantage of LpbF Ti-6-4 decreased due to more intensive wear-accelerated corrosion induced by the stressed martensite. overall， the results demonstrate the suitability of LpbF Ti-6Al-4v for biomedical uses.

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