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Virologica Sinica 2020年第6期35卷 868-874页

作者： Qingmeng Zhang Niaz Ahmed George f.Gao fengmin Zhang Wu Lien-Teh Institute Harbin Medical UniversityHarbin 150081China Department of microbiology School of Basic Medical ScienceHarbin Medical UniversityHarbin 150081China CAS Key Laboratory of Pathogenic microbiology and Immunology Institute of MicrobiologyChinese Academy of Sciences(CAS)Beijing 100864China Chinese Center for Disease Control and Prevention Beijing 102206China

Infectious diseases pose a serious threat to human health and affect social,economic,and cultural *** infectious diseases,such as severe acute respiratory syndrome(SARS,2013),middle East respiratory syndrome(mERS,2012 and 2013),Zika virus infection(2007,2013 and 2015),and coronavirus disease 2019(COVID-19,2019),have occurred as regional or global epidemics(Reperant and Osterhaus 2017;Gao 2018)。

关键词： respiratory diseases acute

Infuence of elemental composition in environmental impacts of steel

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Journal of Iron and Steel Research International 2020年第5期27卷 598-607页

作者： E.Batuecas C.mayo R.Diaz f.J.Perez Thermal and fluid Engineering Department Carlos III University of Madrid28911 LeganesMadridSpain Chemical and materials Engineering Department Complutense University of Madrid28040 MadridSpain Technical Sciences and Engineering UDIMA University28400 Collado VillalbaMadridSpain。

The environmental behavior of four steels was *** the operation phase of concentrating solar power plants,steels withstand high temperature because of its contact with molten ***,choosing the steel type for the molten salt tanks remains a great *** the cold tank,carbon steel is usually used although an approach with low chromium content steel is being studied for these ***,in high temperature applications,such as hot store tank,austenitic stainless steel is the most frequent ***,ferritic steel is being considered as a promising material in these *** many researchers studied the steel technical properties without considering their environmental damages,this work aimed to introduce the environmental aspects into the material choice by using the life cycle assessment *** one hand,the results showed the environmental adequacy of carbon steel against low chromium content *** the other hand,the results obtained in those steels suitable in high temperature application revealed signifcant environmental benefts from the ferritic steel instead of the austenitic steel.

关键词： Renewable energy Concentrating solar power Life cycle assessment molten salt ferritic steel Austenitic steel

GRAIN BOUNDARY REORGANIZATION IN INTERmETALLIC COmPOUNDS NiAl AND feAl

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Acta metallurgica Sinica(English Letters) 2000年第2期13卷 546-550页

作者： m.D. Starostenkov, B. f. Demyanov, E.A. Kuklina and E. G. Sverdlova General Physics Department, Altai State Technical University, Lenin st 46, Barnaul, 656099, Russia

Computer simulation of grain boundaries(GB) was carried out in fe and ordered alloys NiAl and feAl with B2 superlattice. In this work symmetrical tilt grain boundaries =5[100](012) and = 5[100](013) are studied. The atomic interaction has been described by morse empirical central- force *** atomic structure and energy of GB were investigated by means of construction of -surface using full atomic relaxation by method of molecular statics. It is shown that = 5 tilt GBs in fe, Ni3Al and NiAl have several steady states. Comparison of our results with geometrical model of coincidence site lattice (CSL) was carried out. GBs in model CSL are unstable, the stabilization is achieved by additional displacement at some vector along the plane of defect.

关键词： grain boundary computer simulation γ-surface stable state metastable state

SYNTHESIS AND CRYSTAL STRUCTURE Of A HETERODINUCLEAR COmPLEX

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Chinese Journal of Structural Chemistry 1990年第2期9卷 154-158页

作者：吕士杰 fronczek,f LanzhouInstituteofchemicalphysics chineseAcademyof LanzhouInstituteofchemicalphy

Chinese NGOs in action against HIV/AIDS

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Cell Research 2005年第Z1期 914-918页

作者： Allen f ANDERSON School of Public and Environmental Affairs Indiana University Bloomington Indiana 47405-1701 USA

Chinese nongovernmental organizations (NGOs) have played a significant role in the battle against AIDS in the People’s Republic of China. This article provides a brief overview of the structure of these organizations, as well as an analysis of their principle accomplishments. Of great significance in this analysis is the fact that Chinese NGOs have effectively dealt with many sensitive health education areas that government authorities have felt reluctant to handle directly. As such, they have provided an indispensable component in the HIV/AIDS prevention and control calculus on the mainland.

关键词： HIV/AIDS NGO health education health intervention.

Carbon flowers as electrocatalysts for the reduction of oxygen to hydrogen peroxide

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Nano Research 2023年第9期16卷 11556-11563页

作者： Huaxin Gong Lingze Wei Shucheng Chen Zhihua Chen Thomas f.Jaramillo Zhenan Bao Department of Chemical Engineering Stanford UniversityStanfordCA 94305USA SUNCAT Center for Interface Science and Catalysis SLAC National Accelerator LaboratoryMenlo ParkCA 94025USA

Small-scale and decentralized production of H_(2)O_(2)via electrochemical reduction of oxygen is of great benefit,especially for sanitization,air and water purification,as well as for a variety of chemical *** development of low-cost and highperformance catalysts for this reaction remains a key ***-based materials have drawn substantial research efforts in recent years due to their advantageous properties,such as high chemical stability and high tunability in active sites and *** understanding of structure–activity relationships can guide the design of improved *** hypothesize that mass transport to active sites is of great importance,and herein we use carbon materials with unique flower-like superstructures to achieve high activity and selectivity for O2 reduction to H_(2)O_(2).The abundance of nitrogen active sites controlled by pyrolysis temperature resulted in high catalytic activity and selectivity for oxygen reduction reaction(ORR).The flower superstructure showed higher performance than the spherical nanoparticles due to greater accessibility to the active *** activation improves the catalysts’performances further,driving the production of H_(2)O_(2)to a record-setting rate of 816 mmol·gcat^(−1)·h^(−1)using a bulk electrolysis *** work demonstrates the development of a highly active catalyst for the sustainable production of H_(2)O_(2)through rational design and synthetic *** understanding from this work provides further insight into the design of future carbon-based electrocatalysts.

关键词： carbon materials H_(2)O_(2) oxygen reduction reaction nanostructures

NONHOmOGENEOUS BOUNDARY VALUE PROBLEmS fOR THE KORTEWEG-DE VRIES EQUATION ON A BOUNDED DOmAIN

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Journal of Systems Science & Complexity 2010年第3期23卷 499-526页

作者： Eugene f. KRAmER Bingyu ZHANG Department of mathematics Physics and Computer Science University of Cincinnati Raymond Walters College Cincinnati Ohio 45236 USA Department of mathematical Sciences University of Cincinnati Cincinnati Ohio 45221 USA

This paper studies an initial-boundary-value problem (IBVP) of the Korteweg-de Vriesequation posed on a finite interval with general nonhomogeneous boundary *** thestrong Kato smoothing property of the associated linear problem,the IBVP is shown to be locallywell-posed in the space H^s(0,1) for any s≥0 via the contraction mapping principle.

关键词： KdV equation Korteweg-de Vries equation well-posed.

WKBJ analysis in the periodic wake of a cylinder

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Theoretical & Applied mechanics Letters 2015年第3期5卷 107-110页

作者： f.Giannetti Department of Industrial Engineering University of Salerno

The nature of the three-dimensional transition arising in the flow past a cylinder is investigated by apply- ing the Lifschitz-Hameiri theory along special Lagrangian trajectories existing in its wake. Results show that the yon K^rm^n street is unstable with regard to short-wavelength perturbations. The asymptotic analysis predicts the possible existence of both synchronous （as modes A and B） and asynchronous （as mode C） instabilities, each associated to specific Lagrangian orbits. The proposed study provides useful qualitative information on the origin of the different modes but no quantitative agreement between the growth rates predicted by the asymptotic analysis and by a global stability analysis is observed. The reasons for such mismatch are briefly discussed and possible improvements to the present analysis are sug- gested.

关键词： Cylinder wake Secondary instability Lagrangian trajectories WKBJ approximation

VITREOUS SURGERY: AN UPDATE

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中华医学杂志(英文版) 1981年第3期94卷 167-170页

作者： f.I.To1entino 刘效苏 H.m.freeman Eye Research Institute Retina Foundation Department of Ophthalmology Harvard Medical School Boston Massachusetts U.S.A

Indications for closed vitrectomy have increased remarkably during the past 10 years to include numerous anterior and posterior segment conditions not amenable in the past to other forms of intraocular surgery. Instrumentation and technic for both closed and open-sky vitrectomies have undergone numerous improvements, making the procedures relatively safe and results quite encouraging.

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Ethane dimethylsulphonate selectively destroys Leydig cells in the adult bonnet monkeys (macaca radiata)

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Asian Journal of Andrology 1999年第3期1卷 115-120页

作者： R.Sumathi V.Sriraman B.S.Kurkalli f.f.G.Rommerts A.JagannadhaRao Department of Biochemistry Development and Genetics Indian Institute of ScienceBangalore 560012India Department of Biochemistry Erasmus University RotterdamRotterdam 3000 DRThe Netherlands 不详

Aim:To study the effect of intratesticular administration of ethane-1,2-dimethylsulphonate(EDS)which has been exten-sively used to selectively destroy Leydig cells in rats and study the role of gonadotropin in regulation of differentiation ofLeydig cells(LC)in the adult male bonnet *** and Results:In vitro studies with cultured interstitialcells isolated from monkey testis revealed an inhibitory effect of EDS on LC as assessed by decrease in testosterone *** administration of EDS(5,10,20,50 mg/testis)resulted in a dose-dependent rapid decrease inserum testosterone levels,with a 65%decrease with 5 mg of EDS by the 3rd day,which returned to control levels by the45th *** treatment resulted in a significant decrease in testicular *** addition a significant decrease in[(125)~I]hCG binding and phenylesterase activity in the interstitial cells was *** analysis of the testes onthe 5th day after administration of EDS revealed an interstitium devoid of LC indicating the destructive action of ***:The monkey LC are sensitive to destructive action of EDS.

关键词： macaca radiata ethane dimethylsulphonate Leydig cells testosterone