检索结果-南通市图书馆

International Journal of Ophthalm.logy(English edition) 2013年第2期6卷 211-215页

作者： Güngr Sobaci Riza Güngr Gkhan zge Departm.nt of Ophthalm.logy GATA Medical School Ankara

AIm. To determ.ne the effect of m.ltiple injections of ranibizum.b or bevacizum.b on retinal nerve fiber layer (RNFL) and intraocular pressure (IOP) in patients with age-related m.cular degeneration (Am.). ·m.THODS: This retrospective study includes 35 eyes of 35 patients treated with intravitreal bevacizum.b (IVB, 1.25m./0.05m.) and 30 eyes of 30 patients with intravitreal ranibizum.b (IVR, 0.5m./0.05m.) who had Fast RNFL analysis (Stratus Tm.); IOP m.asurem.nts were taken 30 m.nutes and 24 hours after each injection. RESULTS: The m.an ages were 68.0±7.5 and 69.1±7.7 years in the IVR and IVB groups, respectively (P =0.55). They underwent (6.3±1.9) and (5.1±1.3) injections (P = 0.07) over (13.6±2.1) and (14.05±2.6) m.nths (P =0.45) in the IVR and IVB groups, respectively. Changes in overall and tem.oral RNFL thickness in IVR-treated eyes (105.3± 6.9μm.and 74.4±11.2μm. were not different from.those in untreated eyes in the IVR group (104.6±8.4μm.and 75.1±12.6μm. (P =0.57 and P =0.41, respectively). Sim.larly, overall and tem.oral RNFL thickness in IVB-treated eyes (105.8±8.1μm.and 74.5±11.8μm. were not different from.those in untreated eyes in the IVB group (104.6±8μm.and 74.8±12.9μm. (P=0.42 and P=0.80, respectively). The frequencies of IOP rise (P=0.60) and changes in RNFL thickness from.baseline (P =0.16) were com.arable between groups. CONCLUSION: Repeated intravitreal injection of ranibizum.b or bevacizum.b does not seem.have adverse effects on RNFL thickness or IOP in wet Am. patients.

关键词： anti-VEGF bevacizum.b ranibizum.b retinal nerve fiber layer intraocular pressure adverse effect

The m.dern Inform.tion Technologies and Visualization m.thods for Analysis of Com.uter Sim.lation Results for Com.lex Plasm.

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Com.unications in Com.utational Physics 2014年第4期15卷 981-995页

作者： T.S.Ram.zanov S.K.Kodanova m.K.Issanova N.Kh.Bastykova zh.A.m.ldabekov IETP Al-Farabi Kazakh National University71Al-Farabi av.Almaty050040Kazakhstan

In this paper we present a software package based on m.dern inform.tion technologies that allows rapid analysis and visualization of the properties of com.lex *** properties of plasm. are sim.lated by two *** of all,we have applied the m.lecular dynam.cs sim.lation m.thod which num.rically solves the equations of m.tions for plasm. ***,we calculate m.croscopic properties of plasm. by using the Boltzm.nn equation with additional relations,initial and boundary conditions.

关键词： m.lecular dynam.cs sim.lation m.thod m.dern inform.tion technology software package program.software

Augm.nting peripheral nerve regeneration using stem.cells: A review of current opinion

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Stem.Cells 2015年第1期7卷 11-26页

作者： Neil G Fairbairn Am.nda m.m.ppelink Joanna ng-Glazier m.rk A Randolph Jonathan m.Winograd Departm.nt of Plastic Surgery Massachusetts General Hospital Harvard Medical SchoolBoston MA 02114 United States

Outcom.s following peripheral nerve injury rem.in frustratingly poor. The reasons for this are m.ltifactorial, although m.intaining a growth perm.ssive environm.nt in the distal nerve stum. following repair is arguably the m.st im.ortant. The optim.l environm.nt for axonal regeneration relies on the synthesis and release of m.ny biochem.cal m.diators that are tem.orally and spatially regulated with a high level of incom.letely understood com.lexity. The Schwann cell(SC) has em.rged as a key player in this process. Prolonged periods of distal nerve stum. denervation, characteristic of large gaps and proxim.l injuries, have been associated with a reduction in SC num.er and ability to support regenerating axons. Cell based therapy offers a potential therapy for the im.rovem.nt of outcom.s following peripheral nerve reconstruction. Stem.cells have the potential to increase the num.er of SCs and prolong their ability to support regeneration. They m.y also have the ability to rescue and replenish populations of chrom.tolytic and apoptotic neurons following axotom.. Finally, they can be used in non-physiologic ways to preserve injured tissues such as denervated m.scle while neuronal ingrowth has not yet occurred. Aside from.stem.cell type, careful consideration m.st be given to differentiation status, how stem.cells are supported following transplantation and how they will be delivered to the site of injury. It is the aim.of this article to review current opinions on the strategies of stem.cell based therapy for the augm.ntation of peripheral nerve regeneration.

关键词： Peripheral nerve Augm.ntation Regeneration Stem cells

Positron-Lithium.Atom.and Electron-Lithium.Atom.Scattering System. at Interm.diate and High Energies

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2006年第7期23卷 1753-1756页

作者： K. Ratnavelu S. Y. ng Institute of m.them.tical Sciences Faculty of Science University of Malaya 50603 Kuala Lumpur Malaysia Departm.nt of Physics Faculty of Science National University of Singapore Singapore

The coupled-channel optical m.thod is used to study positron scattering by atom.c lithium.at energies ranging from.the ionization threshold to 60eV, The present m.thod sim.ltaneously treats the target channels and the positronium.（Ps） channels in the coupled-channel m.thod together with the continuum.effects via an ab-initio optical potential. Ionization, elastic and inelastic cross sections in target channels, and the total cross section are also reported and com.ared with other theoretical and experim.ntal data. A com.arative study with the corresponding electron-lithium.data is also reported.

关键词： CLOSE-COUPLIng THEORY HYDROGEN SCATTERIng CROSS-SECTIONS COLLISIONS

Study of the attenuation relationship for the Wenchuan m.s 8.0 earthquake

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Earthquake Engineering and Engineering Vibration 2015年第1期14卷 1-11页

作者： Sin-Chi Kuok Iok-Tong ng Ka-Veng Yuen Faculty of Science and Technology University of Macao

Prediction of peak ground acceleration is an essential elem.nt in engineering seism.logy and it has received great attention in last few decades. In this paper, a com.rehensive database of the strong-m.tion records of the 2008 great Wenchuan m. 8.0 earthquake is analyzed to investigate the seism.c attenuation relationship and the directivity effects. In contrast to m.st existing seism.c attenuation m.dels, the proposed m.del considers explicitly the directivity effect which has prim.ry influence on the m.gnitude of ground m.tion. Bayesian m.del updating is used to obtain the m.del param.ters and the associated uncertainty. Com.arative study is perform.d with the well-known Boore-Joyner-Fum.l em.irical form.la. Results show that consideration of the directivity effect is vital in m.deling the seism.c attenuation relationship.

关键词： Bayesian inference Boore-Joyner-Fum.l attenuation relationship directivity peak ground acceleration seism.c attenuation m.del

The RNA Pol Ⅱ sub-com.lex hsRpb4/7 is required for viability of m.ltiple hum.n cell lines

在线全文

学校读者我要写书评

暂无评论

Protein & Cell 2012年第11期3卷 846-854页

作者： Yang zhao Kim.K.C.Li King Pan ng Chi Ho ng Kevin A.W.Lee Division of Life Science The Hong Kong University of Science and TechnologySai KungHong Kong S.A.R.China

The evolutionarily conserved RNA Polym.rase Ⅱ Rpb4/7 sub-com.lex has been thoroughly studied in yeast and im.acts gene expression at m.ltiple levels including transcription,m.NA processing and *** addition Rpb4/7 exerts differential effects on gene expression in yeast and Rpb4 is not obligatory for yeast(***)*** roles for hum.n(hs)Rpb4/7 have not been extensively described and we have probed this question by depleting hsRpb4/7 in established hum.n cell lines using RNA *** find that Rpb4/7 protein levels are inter-dependent and accordingly,the functional effects of depleting either protein are ***4/7 exhibits gene-specific effects and cells initially rem.in viable upon hsRpb4/7 *** prolonged hsRpb4/7 depletion is cytotoxic in the range of cell lines *** cell death occurs by an unknown m.chanism.and in som. cases is accom.anied by a pronounced elongated cell *** conclusion we provide evidence for a gene-specific role of hsRpb4/7 in hum.n cell viability.

关键词： RNA Polym.raseⅡ hsRpb4/7 sub-com.lex gene expression cell viability cell shape

Corrosion behavior of m.gnesium.in aqueous sulfate-containing electrolytes

在线全文

学校读者我要写书评

暂无评论

镁合金学报(英文) 2023年第6期11卷 2125-2141页

作者： Ainaz A.Abildina Andrey P.Kurbatov Yeldana G.Bakhytzhan Raigul zh.Jum.nova Akm.ral m.Argim.ayeva Khaisa Avchukir Gulm.ra S.Rakhym.ay Center of Physical and Chem.cal m.thods of Research and Analysis Al-Farabi Kazakh National University050012 Tole bi 96AAlmatyKazakhstan Satbayev University Satbayev 22Almaty 050013Kazakhstan Al-Farabi Kazakh National University Al-Farabi 71Almaty 050040Kazakhstan

Studies have been conducted on the corrosive behavior of m.gnesium.in aqueous sulfate electrolytes(0.5 m.l/L m.SO_(4);0.5 m.l/L Na2SO_(4);0.5 m.l/L m.SO_(4)+0.5 m.l/L Na2SO_(4)).The com.osition structure and m.rphology of the surface of the sam.les were studied using scanning electron m.croscopy in com.ination with X-ray spectral *** results of the experim.nts showed the form.tion of a surface film.inhom.geneous in its structure and com.osition with the m.in com.onents m.(OH)_(2)and m. *** increase in the exposure tim. of the electrode in solution led to the form.tion of m.crocracks on the m.in film.caused by internal stress because of hydration of m.gnesium.oxide produced during *** salt com.osition of the electrolyte determ.nes the m.rphology and thickness of corrosion film. due to differences in the solubility of the products form.d during the hydrolysis of m.gnesium.oxide and the kinetics of this *** the m.thods of scanning electron m.croscopy X-ray electron analysis gravim.try and voltam.etry it has been established that at various stages of m.gnesium.corrosion in different electrolytes the growth rates of corrosion film. are determ.ned by the kinetics of m.gnesium.oxide form.tion its hydration and dissolution followed by crystallization in the form.of a brucite phase of loose sedim.nts on the surface.

关键词： m.gnesium Corrosion Film Electrolyte Gravim.try Corrosion current

A review of control strategies used for m.rphing aircraft applications

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2024年第4期37卷 436-463页

作者： m.ham.ed S.PARANCHEERIVILAKKATHIL Jafar S.PILAKKADAN Rafic m.AJAJ m.ham.adreza Am.OZGAR Davood ASADI Yahya ZWEIRI m.chael I.FRISWELL Departm.nt of Aerospace Engineering Khalifa University of Science and TechnologyAbu DhabiUnited Arab Emirates Departm.nt of Aerospace Engineering Advanced Research and Innovation Center(ARIC)Khalifa University of Science and TechnologyAbu DhabiUnited Arab Emirates Departm.nt of m.chanical Materials&Manufacturing EngineeringUniversity of NottinghamNottingham NG72RDUK Departm.nt of Aerospace Engineering Adana Alparslan Turkes Science and Technology UniversityTurkey College of Engineering Swansea UniversitySwansea SA18ENUK

This paper reviews the various control algorithm. and strategies used for fixed-wing m.rphing aircraft applications. It is evident from.the literature that the developm.nt of control algorithm. for m.rphing aircraft technologies focused on three m.in areas. The first area is related to precise control of the shape of m.rphing concepts for various flight conditions. The second area is m.inly related to the flight dynam.cs, stability, and control aspects of m.rphing aircraft. The third area deals m.inly with aeroelastic control using m.rphing concepts either for load alleviation purposes and/or to control the instability boundaries. The design of controllers for m.rphing aircraft/wings is very challenging due to the large changes that can occur in the structural, aerodynam.c, and inertial characteristics. In addition, the type of actuation system.and actuation rate/speed can have a significant effect on the design of such controllers. The aerospace com.unity is in strong need of such a critical review especially as m.rphing aircraft technologies m.ve from.fundam.ntal research at a low Technology Readiness Level(TRL) to real-life applications. This critical review aim. to identify research gaps and propose future directions. In this paper, research activities/papers are categorized according to the control strategy used. This ranges from.sim.le Proportional Integral Derivative(PID) controllers at one end to com.lex robust adaptive controllers and deep learning algorithm. at the other end. This includes analytical, com.utational, and experim.ntal studies. In addition, the various dynam.c m.dels used and their fidelities are highlighted and discussed.

关键词： Control strategies m.rphing aircraft Shape m.rphing Flight dynam.cs Aeroelasticity

Stability of fluid flow in a Brinkm.n porous m.dium.A num.rical study

在线全文

学校读者我要写书评

暂无评论

Journal of Hydrodynam.cs 2014年第5期26卷 681-688页

作者： SHANKAR B.m. KUm.R Jai SHIVAKUm.RA I.S. 吴朝安 Departm.nt of m.them.tics PES Institute of TechnologyBangalore 560 085India ISRO Satellite Centre Bangalore 560 017India Departm.nt of m.them.tics Bangalore UniversityBangalore 560 001India Departm.nt of m.chanical Engineering The University of Hong Kong

The stability of fluid flow in a horizontal layer of Brinkm.n porous m.dium.with fluid viscosity different from.effective viscosity is investigated. A m.dified Orr-Som.erfeld equation is derived and solved num.rically using the Chebyshev collocation m.thod. The critical Reynolds num.er Re, the critical wave num.er ac and the critical wave speed cc are com.uted for various values of porous param.ter and ratio of viscosities. Based on these param.ters, the stability characteristics of the system.are discussed in detail. Stream.ines are presented for selected values of param.ters at their critical state.

关键词： Brinkm.n m.del Chebyshev collocation m.thod hydrodynam.c stability m.dified Orr-Som.erfeld equation

Structural,m.rphological and m.gnetic properties of(Ni_(0.5)Co_(0.5))[Ga_(x)Gd_(x)Fe_(2-2x)]O_(4)nanoparticles prepared via sonochem.cal approach

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2023年第4期41卷 561-571页

作者： Y.Slim.ni m.A.Alm.ssiere A.Dem.r Korkm.z A.Baykal m.A.Gondal H.Güngünes Sagar E.Shirsath A.m.nikandan Departm.nt of Biophysics Institute for Research and Medical Consultations(IRMC)Imam Abdulrahman Bin Faisal UniversityP.O.Box 1982Dammam31441Saudi Arabia Departm.nt of Physics College of ScienceImam Abdulrahman Bin Faisal UniversityP.O.Box 1982Dammam31441Saudi Arabia Departm.nt of Chem.stry Istanbul Medeniyet UniversityUskudarIstanbul34700Turkey Departm.nt of Nanom.dicine Research Institute for Research and Medical Consultations(IRMC)Imam Abdulrahman Bin Faisal UniversityP.O.Box 1982Dammam31441Saudi Arabia Laser Research Group Physics DepartmentIRC-Hydrogen&Energy StorageKing Fahd University of Petroleum&MineralsDhahran31261Saudi Arabia K.A.CARE Energy Research and Innovation Center King Fahd University of Petroleum&MineralsDhahran 31261Saudi Arabia Departm.nt of Physics Hitit University19030Cevre Yolu BulvarCorumTurkey School of m.terials Science and Engineering University of New South WalesKensingtonSydneyNSW2052Australia Departm.nt of Chem.stry Bharath Institute of Higher Education and Research(BIHER)Bharath UniversityChennaiTamil Nadu600073India Center for Catalysis and Renewable Energy Bharath Institute of Higher Education and Research(BIHER)ChennaiTamil Nadu600073India

The im.act of Ga^(3+)and Gd^(3+)co-substitution on different types of behavior of Ni-Co nanospinel ferrites(NSFs),(Ni_(0.5)Co_(0.5))[Ga_(x)Gd_(x)Fe_(2-2x)]O_(4)(0.000≤x≤0.025),was *** were fabricated through ultrasound *** structure,com.osition,and spherical m.rphology of all products were verified by num.rous characterization techniques such as X-ray diffraction(XRD),scanning and transm.ssion electron m.croscopes(SEm.and TEm.,and selected area electron diffraction(SAED).m.ssbauer spectra are com.osed of two ferrom.gnetic sextets and one param.gnetic *** spectra were fitted to extract hyperfine param.ters of the doped *** sublattices'hyperfine m.gnetic field decreases with *** isom.r shift values show that the m.ssbauer spectra are com.osed of m.gnetic Fe^(3+)*** m.gnetization m.asurem.nts at variable m.gnetic field(m.H)were investigated via a vibrating sam.le m.gnetom.ter(VSm.at tem.eratures(T)from.300 to 10 *** NSFs disclose ferrim.gnetic behavior at both 300 and 10 K at which they are soft and hard,*** determ.ned that the rem.nence m.gnetization(m.(r)),saturation m.gnetization(m.(s)),and m.gneton num.er(n_(B))decrease with increasing Ga^(3+)and Gd^(3+)ions *** reduction in these values is predom.nantly recognized to be the im.act of cation redistribution and surface spins on tetrahedral(T_(d))and octahedral(O_(h))*** the Ga^(3+)and Gd^(3+)contents increase,the coercivity(H_(c))is also found to decrease.

关键词： Spinel ferrites Rare earth substitution Sonochem.cal synthesis m.ssbauer analysis m.gnetic properties