检索结果-南通市图书馆

A class of high-mobility layered nanomaterials by design

在线全文

学校读者我要写书评

暂无评论

Journal of materials Science & Technology 2023年第33期164卷 179-187页

作者： Dmitry V.Averyanov Ivan S.Sokolov Oleg E.Parfenov alexander n.Taldenkov Oleg A.Kondratev Andrey m.Tokmachev Vyacheslav G.Storchak national research Center “Kurchatov Institute” Kurchatov Sq.1Moscow 123182Russia

Design of materials with particular functional properties is indispensable albeit very *** and structural analogies can be helpful in this endeavor,especially when a particular combination of properties is sought *** aim is to bundle together 3 characteristics:high carrier mobility,magnetism,and scalability to nanomaterials in the form of a film–such a combination is particularly advantageous for ***,inspired by recent studies of mAl_(2)Si_(2)and related compounds,we develop magnetic EuAl_(2)Ge_(2)and non-magnetic SrAl_(2)Ge_(2)nanomaterials with high carrier *** syntheses employing sacrificial 2D templates result in epitaxial films of mAl_(2)Ge_(2)seamlessly integrated with *** syntheses are followed by a study of the atomic structure,magnetic and electron transport *** particular,the films demonstrate high carrier mobility,exceeding 10,000 cm^(2)V^(-1)s^(-1)in the case of EuAl_(2)Ge_(2),making the materials appealing for *** together,mAl_(2)Ge_(2)and mAl_(2)Si_(2)form a class of high-mobility layered nanomaterials.

关键词： High carrier mobility magnetism SrAl_(2)Ge_(2) EuAl_(2)Ge_(2) Germanium

Physical Characteristics Explain Ball-Carrying Capability in Sub-Elite rugby Union Players

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Science in Sport and Exercise 2023年第3期5卷 244-253页

作者： alexander S.Hart robert m.Erskine Tom J.mclaughlin David r.Clark School of Sport and Exercise Science Liverpool John Moores UniversityL33AF LiverpoolUK Ealing Trailfinders rugby Club LondonUK Institute of Sport Exercise and HealthUniversity College LondonLondonUK

Purpose The aims of the present study were two-fold:(i)to investigate the relationship between physical characteristics and the game statistics associated with ball-carrying capability amongst sub-elite rugby union players,and(ii)to predict the level of change in these physical characteristics required to improve the associated game statistic via regression *** Thirty-eight senior professional players(forwards,n=22;backs,n=16)were assessed for body mass(Bm),back squat(BS)single-repetition maximum(1rm)normalised to Bm(1rm/Bm),10 m sprint velocity(S10),10 m sprint momentum(Sm10),and the game statistics from 22 games within the 2019/20 rFU Championship *** relationship between these measures and the predicted level of change in a physical measure required to improve the total number of the associated game statistic by one were assessed by Pearson’s correlation coefficient and simple regression *** In forwards,an~11.5%reduction in Bm,an~11.8%improvement in BS 1rm/Bm,or an~11.5%increase in S10 was required to improve the game statistics associated with ball-carrying *** backs,a~19.3%increase in Bm or a~15.6%improvement in Sm10 was *** These findings demonstrate that improvements in lower-body relative strength,acceleration performance,and position-specific alterations in body mass are required to maximise the ball-carrying capability and therefore match outcome of sub-elite rugby union players.

关键词： Speed Acceleration momentum Strength Body mass

High Q-factor controllable phononic modes in hybrid phononic–dielectric structures

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advanced Photonics 2019年第2期1卷 41-45页

作者： Bo Qiang alexander m.Dubrovkin Harish n.S.Krishnamoorthy Qian Wang Cesare Soci Ying Zhang Jinghua Teng Qi Jie Wang nanyang Technological University Centre for Disruptive Photonic TechnologiesThe Photonic InstituteSchool of Physical and Mathematical SciencesSingapore nanyang Technological University Centre for OptoElectronics and BiophotonicsSchool of Electrical and Electronic EngineeringSingapore Agency for Science Technology and ResearchInstitute of Materials Research and EngineeringSingapore Agency for Science Technology and ResearchInstitute of Manufacturing TechnologySingapore

Phonon polariton resonances in the mid-infrared spectral range demonstrate properties superior to noble metal-based plasmonics,owing to smaller dissipative loss and better field ***,a conventional way to excite the localized phonon resonance involves ion etching,which reduces the attainable quality factors(Q-factors)of the *** show that by introducing a deep subwavelength layer of dielectric gratings on a phononic substrate,localized dipolar resonance and higher order modes with high Q-factors 96 and 195,respectively,can be *** further demonstrate,via experiments and simulations,that the resonant wavelength and field confinement can be controlled by coupling the localized hybrid mode with propagating surface *** also observed for the first time the coupling between a localized dipolar mode and a propagating higher-order surface phonon-polariton *** results will be useful in designing on-chip,low-loss,and highly integrated phononic devices in the infrared spectral domain.

关键词： hybrid resonance high Q-factor phonon resonance mode splitting

Electrochemical realization of 3D Interconnected moS_(3)/PPy nanowire Frameworks as Sulfur-Equivalent Cathode materials for Li-S Batteries

在线全文

学校读者我要写书评

暂无评论

Energy & Environmental materials 2024年第2期7卷 9-17页

作者： Hongtao Yu Andreas Siebert Shilin mei raul Garcia-Diez roberto Félix Ting Quan Yaolin Xu Johannes Frisch regan G.Wilks marcus Bär Chun Pei Yan Lu Department for Electrochemical Energy Storage Helmholtz-Zentrum Berlin für Materialien und Energie GmbH(HZB)Hahn-Meitner Platz 114109 BerlinGermany Guangdong Province Key Laboratory of Durability for marine Civil Engineering School of Civil EngineeringShenzhen UniversityShenzhenGuangdong 518060China Department of Interface Design HZBAlbert-Einstein-Str.1512489 BerlinGermany Energy materials In-Situ Laboratory Berlin(EmIL) Albert-Einstein-Str.1512489 BerlinGermany Helmholtz-Institute Erlangen-nürnberg for renewable Energy(HI Ern) Albert-Einstein-Str.1512489 BerlinGermany Department of Chemistry and Pharmacy Friedrich-Alexander-Universität Erlangen-NürnbergEgerlandstr.391058Erlangen Germany Institute of Chemistry University of Potsdam14467Potsdam Germany

The development of freestanding and binder-free electrode is an effective approach to perform the inherent capacity of active materials and promote the mechanism study by minimizing the interference from ***,we construct a freestanding cathode composed of moS_(3)/PPy nanowires(nWs)deposited on porous nickel foam(nF)(moS_(3)/PPy/nF)through electrochemical methods,which can work efficiently as sulfur-equivalent cathode material for Li-S *** structural stability of the moS_(3)/PPy/nF cathode is greatly enhanced due to its significant tolerance to the volume expansion of moS_(3)during the lithiation process,which we ascribe to the flexible 3D framework of PPy nWs,leading to superior cycling performance compared to the bulk-moS_(3)/nF *** the interference of binder and carbon additives,the evolution of the chemical and electronic structure of mo and S species during the discharge/charge was studied by X-ray absorption near-edge spectroscopy(XAnES).The formation of lithium polysulfides was excluded as the driving cathode reaction mechanism,suggesting the great potential of moS_(3)as a promising sulfur-equivalent cathode material to evade the shuttle effect for Li-S *** present study successfully demonstrates the importance of structural design of freestanding electrode enhancing the cycling performances and revealing the corresponding mechanisms.

关键词： 3D-network electrochemical lithium-sulfur battery moS_(3) PPy

Efficient training of Ann potentials by including atomic forces via Taylor expansion and application to water and a transition-metal oxide

在线全文

学校读者我要写书评

暂无评论

npj Computational materials 2020年第1期6卷 1205-1218页

作者： April m.Cooper Johannes Kästner alexander Urban nongnuch Artrith School of Chemistry University of St AndrewsSt AndrewsUK Institute for Theoretical Chemistry University of StuttgartStuttgartGermany Department of Chemical Engineering Columbia UniversityNew YorkNYUSA

Artificial neural network(Ann)potentials enable the efficient large-scale atomistic modeling of complex materials with near firstprinciples *** molecular dynamics simulations,accurate energies and interatomic forces are a prerequisite,but training Ann potentials simultaneously on energies and forces from electronic structure calculations is computationally ***,we introduce an efficient alternative method for the training of Ann potentials on energy and force information,based on an extrapolation of the total energy via a Taylor *** translating the force information to approximate energies,the quadratic scaling with the number of atoms exhibited by conventional force-training methods can be avoided,which enables the training on reference datasets containing complex atomic structures.

关键词： forces enable atomic

nitrogen and Carbon Isotope Data of Olenekian to Anisian Deposits from Kamenushka/South Primorye, Far-Eastern russia and Their Palaeoenvironmental Significance

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Earth Science 2018年第4期29卷 837-853页

作者： Yuri D Zakharov micha Horacek alexander m Popov Liana G Bondarenko Far Eastern Geological Institute of russian Academy of Sciences (Far Eastern Branch) Stoletiya Prospect 159 Vladivostok 690022 Russia BLT Wieselburg Research Center HBLFA Francisco-Josephinum Wieselburg 3250 Austria Institute of Lithospheric research Vienna University Vienna 1090 Austria

The Kamenushka Formation, exposed in the northern part of South Primorye （Kamennshka-1 and Kamenushka-2 sections）, is one of the few localities in the world with richly fossiliferous Lower-Upper Olenekian sedimentary successions. Lower to middle Triassic ammonoid-, brachiopod- and conodont-bearing silty-clayey deposits of the Kamenushka-1 and Kamenushka-2 sections have been isotope-geochemically investigated in detail. As a result, these sections, together with the previously investigated Abrek Section, exposed in the southern part of South Primorye, provide almost complete ^15non- and ^13Corg- records for the Lower Triassic of this region. nine n- isotope intervals and the five negative C-isotope excursions, reflecting, apparently, unstable climatic and hydrological conditions, have been distinguished in the Lower Triassic of South Primorye. On the basis of the new C-isotope data the mesohedenstroemia bosphorensis Zone （upper part）, Shimanskyites shimanskyi and neocolumbites insignis zones of South Primorye are correlated now with the Lower Smithian part of the Yinkeng Formation, the Upper Smithian part of the Helongshan Formation and the middle Spathian part of the nanlinghu Formation in South China, respectively, as has been observed in the Abrek, Kamenushka-2, West Pingdingshan and majiashan sections.

关键词： Triassic n- and C-isotopes palaeoclimatology bio- and chemostratigraphy Pri- morye russia.

Bulbocavernosus muscle area measurement： a novel method to assess androgenic activity

在线全文

学校读者我要写书评

暂无评论

Asian Journal of Andrology 2014年第4期16卷 618-622页

作者： Ali A Dabaja matthew S Wosnitzer Anna mielnik alexander Bolyakov Peter n Schlegel Darius A Paduch Department of Urology and reproductive medicine Weill Cornell Medical College New York USA.

Serum testosterone does not correlate with androgen tissue activity, and it is critical to optimize tools to evaluate such activity in males. Ultrasound measurement of bulbocavernosus muscle （BCm） was used to assess the relationship between the number of CAG repeats （CAGn） in the androgen receptor （Ar） and the BCm size; the changes in the number of CAGn over age were also evaluated. Transperineal ultrasound measurement of the BCm was also performed. Ar CAGn were determined by high performance liquid chromatography, and morning hormone levels were determined using immunoassays. Forty-eight men had CAG repeat analysis. Twenty-five were 〈30 years of age, mean 23.7 years （s.d, = 3.24） and 23 were 〉45 years of age, mean 53years （s.d. = 5.58）. The median CAGn was 21 （13-29）. BCm area was greater when the number of CAGn were 〈18 as compared to the number of CAGn 〉24 （P= 0.04）. There was a linear correlation between the number of CAGn and the BCm area r^2= 16% （P= 0.01）. In the 45 to 65-years-old group, a much stronger negative correlation （r^2 = 29%, P= 0.01） was noticed. In the 19 to 29-years-old group, no such correlation was found （r2 = 4%, P = 0.36）. In older men, the number of CAGn increased with age （r^2 = 32%, P= 0.01）. The number of CAGn in the Ar correlates with the area of the BCm. Ultrasound assessment of the BCm is an effective surrogate to evaluate end-organ activity of androgens. The number of CAGn may increase with age.

关键词： age androgen activity androgen receptor androgen sensitivity bulbocavernosus muscle CAG repeats

Overloading of differentiated Caco-2 cells during lipid transcytosis induces glycosylation mistakes in the Golgi complex

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

BIOCELL 2021年第3期45卷 773-783页

作者： GALInA n.DEnISOVA IVAn D.DImOV AnnA V.ZAITSEVA LInArD J.ArTIUX alexander A.mIrOnOV nATALIA r.KArELInA Department of Anatomy Saint Petersburg State Paediatric Medical UniversityPetersburg194100Russia Department of Biochemistry Saint Petersburg State Paediatric Medical UniversityPetersburg194100Russia Department of Heart and Vessel Surgery Saint Petersburg State Paediatric Medical UniversityPetersburg194100Russia The FIrC Institute of molecular Oncology Milan20139Italy

Overloading the intestine enterocytes with lipids induced alteration of the Golgi complex(GC;Sesorova et al.,2020)and could cause glycosylation ***,using differentiated Caco-2 cells with the established 0[I]blood group phenotype(no expression of the blood antigens A and B[AgA,AgB]under normal conditions)as a model of human enterocytes we examined whether the overloading of these cells with lipids could cause errors in the Golgi-dependent *** demonstrated that under these conditions,there were alterations of the GC and the appearance of lipid droplets in the *** cells produced AgA and *** suggested that after overloading of enterocytes with lipids,AgA were mistakenly synthesized in individual enterocytes by the Golgi *** mistakes could explain why in the absence of AgA and AgB antibodies against them exist in the blood.

关键词： Golgi Blood group antigens Glycosylation errors Enterocyte Lipid transcytosis Caco-2 cells

Observation of dipolar transport in one-dimensional photonic lattices

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science Bulletin 2017年第5期62卷 339-344页

作者： Camilo Cantillano Luis morales-Inostroza Bastián real Santiago rojas-rojas Aldo Delgado alexander Szameit rodrigo A.Vicencio Departamento de Física MSI-Nucleus on Advanced Opticsand Center for Optics and Photonics(CEFOP)Facultad de CienciasUniversidad de ChileSantiagoChile Center for Optics and Photonics and mSI-nucleus on Advanced Optics Universidad de ConcepciónCasilla 160-C ConcepcionChile Institute for Physics University of RostockD-18059 RostockGermany

We experimentally study the transport properties of dipolar and fundamental modes on one dimensional(1D) coupled waveguide arrays. By carefully modulating a wide optical beam, we are able to effectively excite dipolar or fundamental modes to study discrete diffraction(single-site excitation) and gaussian beam propagation(multi-site excitation plus a phase gradient). We observe that dipolar modes experience a larger spreading area due to an effective larger coupling constant, which is found to be more than two times larger than the one for fundamental modes. Additionally, we study the effect of non-diagonal disorder and find that while fundamental modes are already trapped on a weakly disorder array, dipoles are still able to propagate across the system.

关键词： Photonic lattices Waveguide arrays Wave propagation Integrated optics