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Exploring van der Waals materials with high anisotropy:geometrical and optical approaches

Light(science & Applications) 2024年第4期13卷 645-653页

作者： Aleksandr s.slavich Georgy A.Ermolaev Mikhail K.Tatmyshevskiy Adilet N.Toksumakov Olga G.Matveeva Dmitriy V.Grudinin Kirill V.Voronin Arslan Mazitov Konstantin V.Kravtsov Alexander V.syuy Dmitry M.Tsymbarenko Mikhail s.mironov sergey M.Novikov Ivan Kruglov Davit A.Ghazaryan Andrey A.Vyshnevyy Aleksey V.Arsenin Valentyn s.Volkov Kostya s.Novoselov Moscow Center for Advanced studies Kulakova str.20Moscow 123592Russia. Emerging Technologies Research Center XPANCEOInternet CityEmmay TowerDubaiUnited Arab Emirates. Donostia International Physics Center(DIPC) Donostia/San-Sebastián 20018Spain. Institute of Materials Ecole Polytechnique Federale de Lausanne1015 LausanneSwitzerland. Department of Chemistry Lomonosov Moscow State UniversityMoscow 119991Russia. Laboratory of Advanced Functional Materials Yerevan State UniversityYerevan 0025Armenia. National Graphene Institute(NGI) University of ManchesterManchester M139PLUK. Department of Materials science and Engineering National University of SingaporeSingapore 03-09 EASingapore. Institute for Functional Intelligent Materials National University of Singapore117544 SingaporeSingapore

The emergence of van der Waals(vdW)materials resulted in the discovery of their high optical,mechanical,and electronic anisotropic properties,immediately enabling countless novel phenomena and *** success inspired an intensive search for the highest possible anisotropic properties among vdW ***,the identification of the most promising among the huge family of vdW materials is a challenging quest requiring innovative ***,we suggest an easy-to-use method for such a survey based on the crystallographic geometrical perspective of vdW materials followed by their optical *** our approach,we found As2s3 as a highly anisotropic vdW *** demonstrates high in-plane optical anisotropy that is~20%larger than for rutile and over two times as large as calcite,high refractive index,and transparency in the visible range,overcoming the century-long record set by *** these benefits,As2s3 opens a pathway towards nextgeneration nanophotonics as demonstrated by an ultrathin true zero-order quarter-wave plate that combines classical and the Fabry–Pérot optical phase ***,our approach provides an effective and easy-to-use method to find vdW materials with the utmost anisotropic properties.

关键词： anisotropy anisotropic high

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Friction-stir welding and processing of Ti-6Al-4V titanium alloy:A review

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Journal of Materials science & Technology 2018年第1期34卷 58-72页

作者： s.mironov Y.s.sato H.Kokawa Department of Materials Processing Graduate School of Engineering Tohoku University

In this work, the current understanding and development of fliction-stir welding and processing of Ti- 6Al-4V alloy are briefly reviewed. The critical issues of these processes are addressed, including welding tool materials and design, tool wea,, processing temperature, material flow, processing window and residual stresses. A particular emphasis is given to microstructural aspects and microstructure-properties relationship. Potential engineering applications are highlighted.

关键词： Ti-6Al-4V titanium alloy Friction-stir welding Friction-stir processing Microstructure Properties

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搅拌摩擦焊超细晶Al-Mg-sc-Zr合金的超塑性行为

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Transactions of Nonferrous Metals society of China 2022年第4期32卷 1083-1095页

作者： I.VYsOTsKIY K.KIM s.MALOPHEYEV s.mironov R.KAIBYsHEV Belgorod National Research University Pobeda 85Belgorod 308015Russia

研究提高搅拌摩擦焊超细晶(UFG)Al-Mg-sc-Zr合金接头超塑性的新工艺。为了抑制严重变形基体材料中通常出现的异常晶粒长大现象,在高温下制备UFG材料。结果表明,新工艺路线可以降低UFG组织中的位错密度,从而提高其热稳定性。然而,新方法... 详细信息

研究提高搅拌摩擦焊超细晶(UFG)Al-Mg-sc-Zr合金接头超塑性的新工艺。为了抑制严重变形基体材料中通常出现的异常晶粒长大现象,在高温下制备UFG材料。结果表明,新工艺路线可以降低UFG组织中的位错密度,从而提高其热稳定性。然而,新方法导致相对较高的小角度晶界比例,从而在随后的超塑性试验中延缓晶界滑动。因此,尽管成功抑制了基材区晶粒的异常长大,但超塑性变形仍优先集中在完全再结晶搅拌区材料中,从而导致最大断裂伸长率未超过700%。

关键词：铝合金等径角挤压搅拌摩擦焊超细晶材料超塑性

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Ashby晶界强化模型适用于高应变吗？（英文）

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Transactions of Nonferrous Metals society of China 2019年第11期29卷 2245-2251页

作者： s.MALOPHEYEV I.VYsOTsKIY s.mironov R.KAIBYsHEV Belgorod National Research University

为了评估Ashby晶界强化模型在高应变范围内的适用性,将具有不同晶粒尺寸的Al Mg合金(~100μm与~1μm)冷轧至真应变约为1.6,并采用透射电镜观察比较两种合金的位错密度。测量结果显示的微小差异表明其违背了Ashby模型,这是由晶粒形状的... 详细信息

为了评估Ashby晶界强化模型在高应变范围内的适用性,将具有不同晶粒尺寸的Al Mg合金(~100μm与~1μm)冷轧至真应变约为1.6,并采用透射电镜观察比较两种合金的位错密度。测量结果显示的微小差异表明其违背了Ashby模型,这是由晶粒形状的显著变化、织构·演化和形成明显的亚结构等因素造成应变约束的局部松弛导致。

关键词：大塑性应变应变协调性位错

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Preliminary results of lithological and palynological study of svobodny,ancient man’s parking relic in Amur region,Russia

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Global Geology 2024年第3期27卷 121-131页

作者： Kovalenko s.V. Kezina T.V. Kryuchko E.I. mironov M.A. Center for the Preservation of Historical and Cultural Heritage of the Amur Region Blagoveshchensk 675000Russia Amur state University Blagoveshchensk 675027Russia

A single-layer monument svobodny,ancient man's parking lot-1,discovered in 2021 as part of archaeological work to study the zone of economic development of the Amur region was investigated lithologically and *** on the results of geomorphological analysis of the territory,the study of artifacts,palynological data,as well as analogy with previously identified and sufficiently studied relics in the region,the existence of the Osinoozersk late Neolithic culture in this territory is *** time of its expansion in the Amur region is determined within the framework of the second half of the IV millennium BC to the first half of the II millennium *** preliminary results of palynological analysis suggest the existence of a temperate climate here,was close to the modern one,which does not contradict the reconstructed paleoclimate and environments of the region during the Holocene period.

关键词： Osinoozersk culture palynological spectra Zeya River paleoclimate

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Preliminary results of lithological and palynological study of svobodny, ancient man's parking relic in Amur region, Russia

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Global Geology 2024年

作者： Kovalenko s.V. Kezina T.V. Kryuchko E.I. mironov M.A. Amur state University Center for the Preservation of Historical and Cultural Heritage of the Amur Region

Asingle-layermonumentsvobodny,ancientman’sparkinglot-1,discoveredin2021aspart of archaeological work to study the zone of economic development of the Amur region was investigated lithologically and palynologically. Based on the results of geomorphological analysis of the territory, the study of artifacts, palynological data, as well as analogy with previously identified and sufficiently studied relics in the region, the existence of the Osinoozersk late Neolithic culture in this territory is assumed. The time of its expansion in the Amur region is determined within the framework of the second half of the IV millennium BC to the first half of the II millennium BC. The preliminary results of palynological analysis suggest the existence of a temperate climate here, was close to the modern one, which does not contradict the reconstructed paleoclimate and environments of the region during the Holocene period.

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Detection and clearance in Alzheimer’s disease: leading with illusive chemical, structural and morphological features of the targets

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Neural Regeneration Research 2024年第3期19卷 497-498页

作者： Luís Gales i3s−Instituto de Investigação e Inovação em saúde Rua Alfredo AllenPortoPortugal(Gales L)IBMC−Instituto de Biologia Molecular e CelularUniversidade do PortoRua Alfredo AllenPortoPortugal ICBAs−Instituto de Ciências Biomédicas Abel salazar Rua de Jorge Viterbo FerreiraPortoPortugal

Highly specific interactions between biomolecules,such as antigen-antibody,protein-ligand,or nucleic acid base pair complementary are on the basis of the organization of complex *** same principles may be tentatively used in molecular medicine for diagnosis and therapeutics.A molecule can be designed to selectively bind a protease and thereby inhibit the production of a peptide that forms toxic aggregates in the brain or an antibody may be produced to bind specifically to that peptide for detection or clearance ***,interference in biological systems is not that *** a start there is the inhibition of the physiological role of the protease;moreover,several cleavage fragments may be produced,which may continue to diverge due to putative post-translational modification and self-assembly processes,hiding the toxic target in a“soup”of peptide species varying in size,structure and chemical composition.A perspective of the current status and challenges in targeting peptide species for diagnosis and treatment in the context of Alzheimer’s disease is given.

关键词： Alzheimer diagnosis thereby

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复发性卵巢癌:应用增强CT和PET/CT准确定位肿瘤复发及预测病人生存率

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国际医学放射学杂志 2010年第6期 573-574页

作者： E.sala M.Kataoka N.P.Taskar N.Ishill s.mironov C.s.Moskowitz 刘竞艳 Department of Radiology Addenbrooke's HospitalBox 218University of CambridgeHills RoadCambridge CB2 QQQEngland

目的比较增强CT和PET/CT检出及定位复发性卵巢癌的准确性及观察者之间的差异,确定影像学表现是否可用于预测生存率。材料与方法机构伦理审查委员会免除

关键词：卵巢癌病人检出卵巢恶性肿瘤复发性 PET/CT CT

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Astrophysical s-factor and reaction rate for 15N(p,γ)16O within the modified potential cluster model

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Chinese Physics C 2024年第4期48卷 130-145页

作者： s.B.Dubovichenko A.s.Tkachenko R.Ya.Kezerashvili N.A.Burkova B.M.Yeleusheva Fesenkov Astrophysical Institute 050020 AlmatyKazakhstan New York City College of Technology City University of New YorkBrooklyn11201 New YorkUSA Graduate school and University Center City University of New York10016 New YorkUSA al-Farabi Kazakh National University 050040 AlmatyKazakhstan

We study radiative p^(15)N capture on the ground state of ^(16)O at stellar energies within the framework of a modified potential cluster model(MPCM)with forbidden states,including low-lying *** investigation of the ^(15)N(p,γ0)^(16)O reaction includes the consideration of ^(3)s_(1) resonances due to E1 transitions and the contribution of the ^(3)P_(1) scattering wave in the p+^(15)N channel due to the ^(3)P_(1)→^(3)P_(0)M1 *** calculated the astrophysical low-energy s-factor,and the extrapolated s(0)turned out to be within 34.7−40.4 keV·*** important role of the asymptotic constant(AC)for the ^(15)N(p,γ0)16O process with interfering ^(3)s_(1)(312)and ^(3)s_(1)(962)resonances is elucidated.A comparison of our calculation for the s-factor with existing experimental and theoretical data is addressed,and a reasonable agreement is *** reaction rate is calculated and compared with the existing *** has negligible dependence on the variation of AC but shows a strong impact of the interference of ^(3)s_(1)(312)and ^(3)s_(1)(962)resonances in reference to the CNO Gamow windows,especially at low *** estimate the contribution of cascade transitions to the reaction rate based on the exclusive experimental data from ***.C.85,065810(2012).The reaction rate enhancement due to the cascade transitions is observed from T_(9)>0.3 and reaches the maximum factor~1.3 at T_(9)=*** present the Gamow energy window and a comparison of rates for radiative proton capture reactions ^(12)N(p,γ)^(13)O,^(13)N(p,γ)^(14)O,^(14)N(p,γ)^(15)O,and ^(15)N(p,γ)^(16)O obtained in the framework of the MPCM and provide the temperature windows,prevalence,and significance of each process.

关键词： low and astrophysical energies p^(15)N system thermonuclear reaction rate potential cluster model CNO-cycle

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The autophagy protein Atg9 functions in glia and contributes to parkinsonian symptoms in a Drosophila model of Parkinson’s disease

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Neural Regeneration Research 2024年第5期19卷 1150-1155页

作者： shuanglong Yi Linfang Wang Margaret s.Ho shiping Zhang school of Life science and Technology ShanghaiTech UniversityShanghaiChina College of Life sciences University of Chinese Academy of SciencesBeijingChina

Parkinson’s disease is a progressive neurodegenerative disease characterized by motor deficits,dopaminergic neuron loss,and brain accumulation ofα-synuclein aggregates called Lewy *** in protein degradation pathways,such as autophagy,has been demonstrated in neurons as a critical mechanism for eliminating protein aggregates in Parkinson’s ***,it is less well understood how protein aggregates are eliminated in glia,the other cell type in the *** the present study,we show that autophagy-related gene 9(Atg9),the only transmembrane protein in the autophagy machinery,is highly expressed in Drosophila glia from adult *** from immunostaining and live cell imaging analysis reveal that a portion of Atg9 localizes to the trans-Golgi network,autophagosomes,and lysosomes in ***9 is persistently in contact with these *** glial atg9 reduces the number of omegasomes and autophagosomes,and impairs autophagic substrate *** suggests that glial Atg9 participates in the early steps of autophagy,and hence the control of autophagic ***,loss of glial atg9 induces parkinsonian symptoms in Drosophila including progressive loss of dopaminergic neurons,locomotion deficits,and glial *** findings identify a functional role of Atg9 in glial autophagy and establish a potential link between glial autophagy and Parkinson’s *** results may provide new insights on the underlying mechanism of Parkinson’s disease.

关键词： Atg9 autophagy glia Parkinson’s disease

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