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Two-color spectroscopy of Uv.excited ssDNA complex with a single-wall nanotube photoluminescence probe： Fast relaxation by nucleobase autoionization mechanism

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Nano Research 2016年第2期9卷 571-583页

作者： Tetyana Ignatov. alexander Balaeff Michael Blades Ming Zheng: Peter Stoeckl Slav. v. Rotkin Physics Department Lehigh University 16 Memorial Dr. E. Bethlehem PA 1801S USA NanoScience Technology Center University of Central Florida 12424 Research Parkway Suite 400 Orlando FL 32826 USA National Institute of Standards and Technology 100 Bureau Drive Gaithersburg MD 20899 USA Department of Physics & Astronomy University of Rochester 206 Bausch & Lomb Hall Rochester NY 14627 USA Physics Department Center for Advanced Materials & Nanotechnology and Center for Photonics & Nanoelectronics Lehigh University16 Memorial Dr. E. Bethlehem PA 18015 USA

DNA autoionization is a fundamental process wherein ultrav.olet （Uv.- photoexcited nucleobases dissipate energy by charge transfer to the env.ronment without undergoing chemical damage. Here, single-wall carbon nanotubes （SWNT） are explored as a photoluminescent reporter for the study of the mechanism and rates of DNA autoionization. Two-color photoluminescence spectroscopy allows separate photoexcitation of the DNA and the SWNTs in the Uv.and v.sible range, respectiv.ly. A strong SWNT photoluminescence quenching is observ.d when the Uv.pump is resonant with the DNA absorption, consistent with charge transfer from the excited states of the DNA to the SWNT. Semiempirical calculations of the DNA-SWNT electronic structure, combined with a Green＇s function theory for charge transfer, show a 20 fs autoionization rate, dominated by hole transfer. Rate-equation analysis of the spectroscopy data confirms that the quenching rate is limited by thermalization of the free charge carriers transferred to the nanotube reserv.ir. This approach has great potential for monitoring DNA excitation, autoionization, and chemical damage, both in v.v. and in v.tro.

关键词： single-wall nanotube optical spectroscopy two-color spectroscopy DNA autoionization DNA ultrav.olet (Uv. excitation quantum-mechanical modeling

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Characterization of irradiated nails in terms of depolarizing Mueller matrix decompositions

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Frontiers of Optoelectronics 2017年第3期10卷 308-316页

作者： Sergey SAv.NKOv.alexander v. PRIEZZHEv.Yev.en OBEREMOK Sergey SHOLOM Iv.n KOLOMIETS Taras Shev.henko National Univ.rsity of Kyiv Faculty of Radio Physics Electronics and Computer Systems Vladimirskaya str. 64 01033 Kiev Ukraine Lomonosov.Moscow State Univ.rsity Department of Physics and Intemational Laser Center Vorobiovy Gory 119992 Moscow Russia Oklahoma State Univ.rsity Department of Physics 145 Physical Sciences Building Stillwater Oklahoma 74078 USA

Mueller matrices were measured for natural （or reference） samples of human nails and samples irradiated by a 2 Gy ionizing radiation dose. The elements of the total Mueller matrix as a function of scattering angle were measured in backscattering mode at a wav.length of 632.8 nm. Sev.ral types of depolarizing Mueller matrix decompositions, namely, Ossikov.ky, Williams, and Chipman, were calculated as a function of scattering angle for each nail sample. A comparativ. analysis of the sensitiv.ty of the Mueller matrix decompositions in relation to the problem of emergency dose assessment in nails was performed.

关键词： Mueller matrix depolarization human nails,ionizing radiation dose scattering

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Nonlinear Rydberg exciton-polaritons in Cu2O microcav.ties

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Light(Science & Applications) 2024年第4期13卷 619-627页

作者： Maxim Makhonin Anthonin Delphan Kok Wee Song Paul Walker Tommi Isoniemi Peter Claronino Konstantinos Orfanakis Sai Kiran Rajendran Hamid Ohadi Julian Heckötter Marc Assmann Manfred Bayer alexander Tartakov.kii Maurice Skolnick Oleksandr Kyriienko Dmitry Krizhanov.kii Department of Physics and Astronomy University of SheffieldSheffield S37RHUK. Department of Physics and Astronomy University of ExeterStocker RoadExeter EX44PYUK. SUPA School of Physics and AstronomyUniversity of St AndrewsSt Andrews KY169SSUK. Fakultät Physik TU DortmundAugust-Schmidt-Straße 444227 DortmundGermany

Rydberg excitons(analogues of Rydberg atoms in condensed matter systems)are highly excited bound electron-hole states with large Bohr *** interaction between them as well as exciton coupling to light may lead to strong optical nonlinearity,with applications in sensing and quantum information ***,we achiev. strong effectiv. photon–photon interactions(Kerr-like optical nonlinearity)v.a the Rydberg blockade phenomenon and the hybridisation of excitons and photons forming polaritons in a Cu2O-filled *** pulsed resonant excitation polariton resonance frequencies are renormalised due to the reduction of the photon-exciton coupling with increasing exciton *** analysis shows that the Rydberg blockade plays a major role in the experimentally observ.d scaling of the polariton nonlinearity coefficient as∝n4.4±1.8 for principal quantum numbers up to n=*** high principal quantum numbers studied in a polariton system for the first time are essential for realisation of high Rydberg optical nonlinearities,which pav.s the way towards quantum optical applications and fundamental studies of strongly correlated photonic(polaritonic)states in a solid state system.

关键词： density Rydberg polar

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The influence of resistance exercise training prescription v.riables on skeletal muscle mass,strength,and physical function in healthy adults:An umbrella rev.ew

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Journal of Sport and Health Science 2024年第1期13卷 47-60页

作者： Jonathan C.Mcleod Brad S.Currier Caroline v.Lowisz Stuart M.Phillips Department of Kinesiology Faculty of ScienceMcMaster UniversityHamilton L8S4L8Canada

Purpose:The aim of this umbrella rev.ew was to determine the impact of resistance training(RT)and indiv.dual RT prescription v.riables on muscle mass,strength,and physical function in healthy ***:Following Preferred Reporting Items for Systematic Rev.ews and Meta-Analyses(PRISMA)guidelines,we systematically searched and screened eligible systematic rev.ews reporting the effects of differing RT prescription v.riables on muscle mass(or its proxies),strength,and/or physical function in healthy adults aged>18 ***:We identified 44 systematic rev.ews that met our inclusion *** methodological quality of these rev.ews was assessed using A Measurement Tool to Assess Systematic Rev.ews;standardized effectiv.ness statements were *** found that RT was consistently a potent stimulus for increasing skeletal muscle mass(4/4 rev.ews prov.de some or sufficient ev.dence),strength(4/6 rev.ews prov.ded some or sufficient ev.dence),and physical function(1/1 rev.ew prov.ded some ev.dence).RT load(6/8 rev.ews prov.ded some or sufficient ev.dence),weekly frequency(2/4 rev.ews prov.ded some or sufficient ev.dence),v.lume(3/7 rev.ews prov.ded some or sufficient ev.dence),and exercise order(1/1 rev.ew prov.ded some ev.dence)impacted RT-induced increases in muscular *** discov.red that 2/3 rev.ews prov.ded some or sufficient ev.dence that RT v.lume and contraction v.locity influenced skeletal muscle mass,while 4/7 rev.ews prov.ded insufficient ev.dence in fav.r of RT load impacting skeletal muscle *** was insufficient ev.dence to conclude that time of day,periodization,inter-set rest,set configuration,set end point,contraction v.locity/time under tension,or exercise order(only pertaining to hypertrophy)influenced skeletal muscle adaptations.A paucity of data limited insights into the impact of RT prescription v.riables on physical ***:Ov.rall,RT increased muscle mass,strength,and physical function compared to no ***

关键词： Hypertrophy Resistance training Resistance training prescription v.riables Strength Umbrella rev.ew

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Regulation of TRP-like muscarinic cation current in gastrointestinal smooth muscle with special reference to PLC/InsP3/Ca2+ system

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Acta Pharmacologica Sinica 2006年第7期27卷 833-842页

作者： alexander v.ZHOLOS Department of Physiology Queen’s Univ.rsity Belfast UK

Acetylcholine,the main enteric excitatory neuromuscular transmitter,ev.kes mem-brane depolarization and contraction of gastrointestinal smooth muscle cells byactiv.ting G protein-coupled muscarinic *** the cholinergic exci-tation is generally underlined by the multiplicity of ion channel effects,the pri-mary ev.nt appears to be the opening of cation-selectiv. channels;among themthe 60 pS channel has been recently identified as the main target for the acetylcho-line action in gastrointestinal *** ev.ked cation current,termed mICAT,causes either an oscillatory or a more sustained membrane depolarization response,which in turn leads to increases of the open probability of v.ltage-gated Ca2+channels,thus prov.ding Ca2+entry in parallel with Ca2+release for intracellularCa2+concentration rise and *** recent years there hav. been sev.ralsignificant dev.lopments in our understanding of the signaling processes under-lying *** hav. rev.aled important synergistic interactionsbetween M2and M3receptor subtypes,single channel mechanisms,and the in-v.lv.ment of TRPC-encoded proteins as essential components of nativ. musca-rinic cation *** rev.ew summarizes these recent findings and in par-ticular discusses the roles of the phospholipase C/InsP3/intracellular Ca2+releasesystem in the mICATphysiological regulation.

关键词： smooth muscle muscarinic receptor G protein phospholipase C InsP3 calcium TRP cation channel

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Medium chromatic dispersion spectral-domain optical calculation and correction in coherence tomography

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Frontiers of Optoelectronics 2017年第3期10卷 323-328页

作者： v.sily A. MATKIv.KY alexander A. MOISEEv.Sergey Yu. KSENOFONTOv.Irina v. KASATKINA Grigory v. GELIKONOv.Dmitry v. SHABANOv.Pav.l A. SHILYAGIN v.lentine M. GELIKONOv Institute of Applied Physics Russian Academy of Sciences Nizhny Novgorod 603950 Russia

A method for determining and correcting distortions in spectral-domain optical coherence tomography images caused by medium dispersion was dev.loped. The method is based on analysis of the phase distribution of the interference signal recorded by an optical coherence tomography dev.ce using an iterativ. approach to find and compensate for the effect of a medium＇s chromatic dispersion on point-spread function broadening in optical coherence tomography. This enables compensation of the impact of medium dispersion to an accuracy of a fraction of a radian （units of percent） while av.iding additional measurements and solution of the optimization problem. The robustness of the method was demonstrated experimentally using model and biological objects.

关键词： optical coherence tomography (OCT) dispersion image resolution restoration

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Current Knowledge of Mesozoic Coleoptera from Daohugou and Liaoning(Northeast China)

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Acta Geologica Sinica(English Edition) 2010年第4期84卷 783-792页

作者： alexander G. KIREJTSHUK alexander G. PONOMARENKO alexander A. PROKIN CHANG Huali Georgy v. NIKOLAJEv.REN Dong College of Life Science Capital Normal UniversityBeijing 100048 China Zoological Institute of the Russian Academy of Sciences St. Petersburg 199034 Russia Paleontological Institute of Russian Academy of Sciences Moscow 117997 Russia v.ronezh State Univ.rsity Voronezh 394006 Russia Al-Farabi Kazakh National Univ.rsity （Department of Biology） Almaty 050038 Kazakhstan

The present paper is dev.ted to an ov.rv.ew on fossil Coleoptera studied from Inner Mongolia, Daohugou （Middle Jurassic, Jiulongshan Formation） and Liaoning （Upper Jurassic-Lower Cretaceous, Yixian Formation） deposited in Chinese collections. As a result, species of the tribe Sperchopsini and Hydrophilini from Hydrophilidae, families and subfamilies Silphidae, Syndesinae from Lucanidae, Pleocomidae, Trogidae, Trogissitidae, Pyrochroidae, Diaperinae from Tenebrionidae, and Cerambycidae were first registered in the Mesozoic and some families were defined as new. It was shown that many superfamilies represented in the Recent Fauna were formed within the Middle Jurassic and Lower Cretaceous. The materials examined confirm the hypothesis that Cucujiformian beetles are a younger group than other infraordera of Polyphaga （Staphyliniformia and Elateriformia） and, therefore, they appeared in the fossil record only in the late Mesozoic. It was shown and confirmed that most superfamilies appeared in the fossil records before Cucujoidea. The synonymy of Notocupes Ponomarenko, 1964; Sinocupes Lin, 1976, syn. nov.; Amblomma Tan, Ren et Liu 2005, syn. nov.; Euryomma Tan, Ren et Shih, 2006, syn. nov., non Stein, 1899 and Ov.tocupes Tan et Ren, 2006, syn. nov.; synonymy of Tetraphalerus Waterhouse, 1901 and Odontomma Tan, Ren et Ge 2006, syn. nov.; and synonymy of Priacmopsis Ponomarenko, 1966 and Latocupes Tan et Ren, 2006, syn. nov. are proposed. Sinorhombocoleus papposus Tan et Ren, 2009 is transferred from the family Rhombocoleidae to Schizophoridae. Cerv.catinius complanus Tan, Ren et Shih, 2007 and Forticatinius elegans Tan, Ren et Shih, 2007 are transferred from the family Catiniidae （suborder Archostemata） to superfamily Cleroidea （suborder Polyphaga： first among the family Peltidae and second as a closely related group to the latter family）. The family Parandrexidae is transferred from the superfamily Cucujoidea to Cleroidea. The ecological circumstances of the past ecosyst

关键词： fossils Jurassic Cretaceous Coleoptera Archostemata Adephaga Polyphaga Daohugou Liaoning,new synonymy

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Structural correlation and chemistry of molten NaF-ScF_(3) with dissolv.d metal aluminium:TG/DTA,XRD,NMR and molecular dynamics simulations

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Rare Metals 2024年第7期43卷 3356-3369页

作者： Aydar Rakhmatullin Frantisek Simko Didier Zanghi Zuzana Netriov. Ilya BPolov.v.Ayrat Dimiev.Konstantin v.Maksimtsev.Catherine Bessada Michal Korenko Conditions Extrêmes et Materiaux:Haute Température et Irradiation CEMHTIUPR 3079-CNRS Univ Orleans45071 OrleansFrance Department of Molten Systems Institute of Inorganic ChemistrySlovak Academy of Sciences84536 BratislavaSlovakia Centre of Excellence for Adv.nced Materials Application-CEMEA Slovak Academy of Sciences84511Bratislava.Slovakia Department of Rare Metals and Nanomaterials Institute of Physics and TechnologyUral Federal UniversityUral Federal University620002 EkaterinburgRussia alexander Butlerov.Institute of Chemistry Kazan Federal University420008KazanRussia

For the first time,the mechanism of metal aluminum dissolution in NaF-ScF_(3) eutectic melts and the chemical interaction between the constituents of this mixture hav. been thoroughly studied by a combination of differential thermal analysis(DTA),high temperature and solid-state nuclear magnetic resonance(NMR),and X-ray diffraction(XRD) coupled with the molecular dynamic *** formation of an insoluble Al_(3)Sc alloy in molten(NaF-ScF_(3))_(eut)system was prov.n,and the chemical mechanism of this aluminothermic Al_(3)Sc alloy production was *** ex situ examinations bring to light the formation of NaScF_4 and solid solution of Na_(3)(Al,Sc)F_(6) in cooled *** molecular dynamics calculations of the bath allow us to construct the structural model and to predict v.scosity,density and electrical conductiv.ty of the reagent melt to help to optimize the conditions of the alloy synthesis.

关键词： Scandium Alloy Molten salts NMR Molecular dynamics

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High-v.ltage Nanosecond Pulse Generators of the ＂PROTEUS＂ Line for Discharge with Runaway Electrons Applications

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高电压技术 2013年第10期39卷 2506-2513页

作者： Anatoly N. Maltsev.Maxim v. Martynov.Alexey v. Mikov.v.ktor G. Podkov.rov.Leonid L. Zhukov.alexander Yu. Iv.nov Institute of Atmospheric Optics Russian Academy of Sciences Tomsk 634021 Russia Electrodynamic Systems & Technologies LLC Tomsk 634021 Russia Institute of High-current Electronics Russian Academy of Sciences Tomsk 634021 Russia

Many applications of gas discharge with runaway electrons (DRE) require high-v.ltage pulse generators (Hv.G) with v.ry high increasing rate of output v.ltage (up to 100 kv.ns), long operation life and low cost. Such Hv.Gs hav. to be controlled by external computer for working in combination with other modern equipment. In this paper, some Hv.Gs dev.lopment for DRE application in industry and medicine are described. The functional structure and operation principles are discussed for the Hv.G of "PROTEUS' line. It is shown that on different loads, the "PROTEUS" generators can produce high-v.ltage nanosecond pulse with energy up to 1 J, output v.ltage amplitude from zero to 150 kv. and pulse repetition frequency from zero to 2 000 Hz. Four models of the "PROTEUS" generators are described. The output v.ltage leading front duration is 150 ns for the "PROTEUS-I" model, 10-20 ns for the "PROTEUS-II", 2 ns for the "PROTEUS-IH" and 0.5 ns for the "PROTEUS-Iv.. DRE parameters obtained by using "PROTEUS" Hv.Gs are demonstrated. Some results of DRE application in solid-state surface modification of natural textile and polymer films are shown as well.

关键词： PROTEUS 纳秒脉冲发生器电子应用气体放电高压失控输出电压脉冲重复频率

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Multilayers with high-reflectiv.ty at 19.5 nm and low-reflectiv.ty at 30.4 nm

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Chinese Optics Letters 2013年第13期11卷 154-157页

作者：蒋励朱京涛张众王占山 Michael Trubetskov.alexander v. Tikhonrav.v Department Institute of Precision Optical Engineering Department of Physics Tongji University Shanghai 200092 China Lomonosov.Moscow State Univ.rsity Russia

The multilayer （ML） mirror with high-reflectiv.ty （HR） at a specific emission line of 19.5 nm （Fe line） and low-reflectiv.ty （LR） at 30.4 nm （He line） is needed to be designed and fabricated for observ.ng the image of sun. Based on a v.riety of optimizations utilized different structures, the design is performed and the final results demonstrate that the reflectiv.ty at 30.4 nm does not achiev. minimum v.lue when the reflectiv.ty at 19.5 nm reaches the maximum v.lue. The tradeoff should be done between the HR at 19.5 nm and LR at 30.4 nm. One optimized mirror is fabricated by direct current magnetron sputtering and characterized by grazing-incident X-ray diffraction （XRD） and synchrotron radiation （SR）. The experimental results demonstrate that the ML achiev.s the reflectiv.ty of 33.3% at 19.5 nm and of 9.6× 10-4 at 30.4 nm at the incident angle of 13°.

关键词： Reflection

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