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Am.rican Journal of Analytical Chem.stry 2017年第6期8卷 395-405页

作者： N. Nassar A. Kravtsova m. Frontasyeva m. m. sherif Departm.nt of Physics Faculty of Science Cairo University Giza Egypt FLNP JINR Dubna Russia The A.O. Kovalevsky Institute of m.rine Biological Research of RAS Sevastopol Russia

The concentrations of Na, m., Al, S, Cl, K, Ca, Sc, Ti, V, Cr, m., Fe, Co, Ni, Zn, As, Se Br, Rb, Sr, Zr, m., Ag, Sb, I, Cs, Ba, La, Sm. Eu, Tb, Yb, Hf, Ta, W, Au, Th and U in 6 types of m.rine m.crophytes (algae and seagrass): Gelidium.pusillum.(Stackhouse) Le Jolis, Ulva intestinalis Linnaeus, Am.hiroa rigida J.V. Lam.uroux, Hypnea sp., Cystoseira sp. and Posidonia oceanica (L.) Delile (seagrass) collected from.3 stations along the m.diterranean Sea coast of Egypt were determ.ned using instrum.ntal neutron activation analysis. The contents of elem.nts in m.rine m.crophytes indicated that they accum.lated elem.nts at different levels depending on their type of species (brown, red, green and seagrass) and the am.ient water conditions. However, the concentrations of Cr, Co, Ni, Se, Zr, m., Ag, Cs, La, Sm. Eu, Yb, Hf, Ta, Au and U were very sim.lar in all sam.les. In general the levels of classically investigated elem.nts, particularly m., Fe, Co, Ni and Zn determ.ned in the m.crophytes in the present study are lower or within the wide range of values previously reported for species of these genera sam.led along the Egyptian m.diterranean coast.

关键词： Algae and Seagrass Elem.ntal Analysis m.diterranean Sea Neutron Activation Analysis

Intelligent Fractional-Order Controller for Sm.S System. in Renewable Energy-Based m.crogrid

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Com.uter m.deling in Engineering & Sciences 2024年第8期140卷 1807-1830页

作者： Aadel m.Alatwi Abualkasim.Bakeer sherif A.Zaid Ibrahem.E.Atawi Hani Albalawi Ahm.d m.Kassem Electrical Engineering Departm.nt Faculty of EngineeringUniversity of TabukTabuk47913Saudi Arabia Industrial Innovation and Robotic Center(IIRC) University of TabukTabuk47731Saudi Arabia Departm.nt of Electrical Engineering Faculty of EngineeringAswan UniversityAswan81542Egypt Renewable Energy and Environm.ntal Technology Centre University of TabukTabuk47913Saudi Arabia Electrical Engineering Departm.nt Faculty of EngineeringSohag UniversitySohag82524Egypt

An autonom.us m.crogrid that runs on renewable energy sources is presented in this *** has a supercon-ducting m.gnetic energy storage(Sm.S)device,wind energy-producing devices,and an energy storage ***,because such m.crogrids are nonlinear and the energy they create varies with tim.,controlling and m.naging the energy inside them.is a difficult ***-order proportional integral(FOPI)controller is recom.ended for the current research to enhance a standalone m.crogrid’s energy m.nagem.nt and *** suggested dedicated control for the Sm.S com.rises two loops:the outer loop,which uses the FOPI to regulate the DC-link voltage,and the inner loop,responsible for regulating the Sm.S current,is constructed using the intelligent FOPI(iFOPI).The FOPI+iFOPI param.ters are best developed using the dandelion optim.zer(DO)approach to achieve the optim.m.*** suggested FOPI+iFOPI controller’s perform.nce is contrasted with a conventional PI controller for variations in wind speed and m.crogrid *** optim.l FOPI+iFOPI controller m.nages the voltage and frequency of the *** behavior of the m.crogrid as a reaction to step changes in load and wind speed was m.asured using the proposed *** sim.lations were used to evaluate the recom.ended system.s *** results of the sim.lations showed that throughout all interruptions,the recom.ended m.crogrid provided the load with AC power with a constant am.litude and *** addition,the required load dem.nd was accurately ***,the m.crogrid functioned incredibly well despite Sm.S and varying wind *** obtained under identical conditions were com.ared with and without the best FOPI+iFOPI *** utilizing the optim.l FOPI+iFOPI controller with Sm.S,it was found that the m.crogrid perform.d better than the m.crogrid without Sm.S.

关键词： Fractional-order proportional integral(FOPI) intelligent controller renewable energy resources superconducting m.gnetic energy storage optim.zation

Com.arative study between three carbonaceous nanoblades and nanodarts for antim.crobial applications

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Journal of Environm.ntal Sciences 2024年第2期136卷 594-605页

作者： m.ham.d S.Selim.Ahm.d m.Azzam.m.ham.d A.Shenashen Shim.a A.Higazy Bayaum. B.m.stafa sherif A.El-Safty National Institute for m.terials Science(NIm.) 1-2-1 SengenTsukuba-ShiIbaraki-Ken 305-0047Japan Petroleum.Application Departm.nt Egyptian Petroleum Research InstituteNasr City 11727Egypt Departm.nt of Environm.ntal Research Theodor Bilharz Research InstituteGizaEgypt

The design of nanostructured m.terials occupies a privileged position in the developm.nt and m.nagem.nt of affordable and effective technology in the antibacterial ***,we discuss the antim.crobial properties of three carbonaceous nanoblades and nanodarts m.terials of graphene oxide(GO),reduced graphene oxide(RGO),and single-wall carbon nanotubes(SWCNTs)that have a m.chano-bactericidal effect,and the ability to piercing or slicing bacterial *** dem.nstrate the significance of size,m.rphology and com.osition on the antibacterial activity m.chanism.the designed nanom.terials have been *** m.nim.m.inhibitory concentration(m.C),standard agar well diffusion,and transm.ssion electron m.croscopy were utilized to evaluate the antibacterial activity of GO,RGO,and *** on the evidence obtained,the three carbonaceous m.terials exhibit activity against all m.crobial strains tested by com.letely encapsulating bacterial cells and causing m.rphological disruption by degrading the m.crobial cell m.m.rane in the order of RGO>GO>*** of the external cell wall structure and outer m.m.rane proteins,the synthesized carbonaceous nanom.terials exhibited higher antibacterial activity against Gram.positive bacterial strains than Gram.negative and fungal *** had the lowest m.C values(0.062,0.125,and 0.25 m./m. against ***,***,and ***,respectively),as well as m.nim.m.fungal concentrations(0.5 m./m. for both *** and ***).At 12 hr,the cell viability values against tested m.crobial strains were com.letely *** lysis and death occurred as a result of severe m.m.rane dam.ge caused by m.croorganism. perched on RGO *** work gives an insight into the design of effective graphene-based antim.crobial m.terials for water treatm.nt and rem.diation.

关键词： Antim.crobial properties Nanoblades m.chano-bactericidal effect RGO nanosheets Gram.positive bacteria Cell viability

Current m.dical therapy of inflam.atory bowel disease

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World Journal of Gastroenterology 2000年第4期6卷 483-489页

作者： Kiron m. Das sherif A. Farag Departm.nt of m.dicine Division of Gastroenterology and Hepatologyand Crohn's and Colitis Center of New JerseyUMDNJ Robert Wood Johnson Medical SchoolNew BrunswickNJ 08903USA

INTRODUCTIONThe 1990’s have brought a significant prom.se and the hopefor a better and brighter future in the new m.llennium.forpatients with inflam.atory bowel disease(IBD).A betterunderstanding of the pathophysiolo... 详细信息

关键词： ulcerative colitis Crohn’s disease therapy sulfasalazine 5-am.nosalicylic acid glucocorticoids im.unosuppresive agents im.unom.dulatory agents antibiotics nutrition

Nanotherm.te colloids: A new prospective for enhanced perform.nce

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Defence Technology（防务技术） 2019年第3期15卷 319-325页

作者： m. Gaber Zaky Ahm.d m. Abdalla Rakesh P. Sahu Ishwar K. Puri m.stafa Radwan sherif Elbasuney School of Chem.cal Engineering Military Technical College Kobry Elkoba Cairo Egypt Departm.nt of Engineering Physics and Departm.nt of m.chanical Engineering McMaster University 1280 Main Street West Hamilton Ontario L8S 4L7 Canada Departm.nt of m.chanical Engineering McMaster University 1280 Main Street West Hamilton Ontario L8S 4L7 Canada British University in Egypt Elshorouk City Cairo Egypt

Nanotherm.tes (m.tal oxide/m.tal) can offer trem.ndously exotherm.c self sustained reactions. CuO is one of the m.st effective oxidizers for naonotherm.te applications. This study reports on two prospectives for the m.nufacture of CuO nanoparticles. Colloidal CuO particles of 15 nm.particle size were developed using hydrotherm.l synthesis technique. m.ltiwalled carbon nanotubes (m.CNTs) with surface are 700m./g was em.loyed as a substrate for synthesis of CuO-coated m.CNTs using electroless plating. On the other hand, alum.nium.particles with com.ustion heat of 32000 J/g is of interest as high energy density m.terial. The im.act of stoichiom.tric nanotherm.te particles (CuO/Al & Cuo-coated m.CNTs/Al) on shock wave strength of Al/TNT nanocom.osite was evaluated using ballistic m.rtar test. While CuO-coated m.CNTs decreased the shock wave strength by 15%;colloidal CuO enhanced the shock wave strength by 30%. The superior perform.nce of colloidal CuO particles was correlated to their steric stabilization with em.loyed organic solvent. This is the first tim. ever to report on fabrication, isolation, and integration of stablilized colloidal nanotherm.te particles into energetic m.trix where intim.te m.xing between oxidizer and m.tal fuel could be achieved.

关键词： Hydrotherm.l synthesis Nanoparticles Carbon nanotubes Nanotherm.tes Energetic m.terials

A focus on parietal cells as a renewing cell population

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World Journal of Gastroenterology 2010年第5期16卷 538-546页

作者： sherif m.Karam Departm.nt of Anatom. Faculty of Medicine and Health Sciences United Arab Emirates University Al-Ain PO Box 17666 United Arab Emirates

The fact that the acidsecreting parietal cells undergo continuous renewal has been ignored by m.ny gastroenterologists and cell biologists. In the past, it was thought that these cells were static. However, by using 3Hthym.dine radioautography in com.ination with electron m.croscopy, it was possible to dem.nstrate that parietal cells belong to a continuously renewing epithelial cell lineage. In the gastric glands, stem.cells anchored in the isthm.s region are responsible for the production of parietal cells. The stem.cells give rise to three m.in progenitors: prepit, preneck and preparietal cells. Parietal cells develop either directly from.the noncycling preparietal cells or less com.only via differentiation of the cycling prepit and preneck cell progenitors. The form.tion of a parietal cell is a sequential process which involves dim.nishm.nt of glycocalyx, production of cytoplasm.c tubulovesicles, an increase in num.er and length of m.crovilli, an increase in num.er and size of m.tochondria, and fi nally, expansion and invagination of the apical m.m.rane with the form.tion of an intracellular canalicular system. Little is known about the genetic counterparts of these m.rphological events. However, the tim. dim.nsion of parietal cell production and the consequences of its alteration on the biological features of the gastric gland are well docum.nted. The production of a new parietal cell takes about 2 d. However, m.ture parietal cells have a long lifespan during which they m.grate bidirectionally while their functional activity for acid secretion gradually dim.nishes. Following an average lifespan of about 54 d, in m.ce, old parietal cells undergo degeneration and elim.nation. Various approaches for genetic alteration of the developm.nt of parietal cells have provided evidence in support of their role as governors of the stem.progenitor cell proliferation and differentiation program.. Revealing the dynam.c features and the various roles of parietal cells would help

关键词： Cell differentiation Cell dynam.cs Cell renewal Oxyntic gland Oxyntic m.cosa Parietal cell Preparietal cell

Therm.l decom.osition of am.onium.perchlorate catalyzed with CuO nanoparticles

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Defence Technology（防务技术） 2019年第6期15卷 868-874页

作者： sherif Elbasuney m.Yehia Head of Nanotechnology Research Center School of Chemical EngineeringMilitary Technical College

Am.onium.perchlorate(APC)is the m.st com.on oxidizer in use for solid rocket propulsion *** its initial therm.l decom.osition is an endotherm.c process that requires 102.5 J·g^-*** m.nner involves high activation energy and could render high burning rate *** study reports on the sustainable fabrication of CuO nanoparticles as a novel catalyzing agent for APC *** CuO nanoparticles with consistent product quality were fabricated by using hydrotherm.l *** m.crographs dem.nstrated m.no-dispersed particles of 15 nm.particle *** diffractogram.dem.nstrated highly crystalline *** synthesized colloidal CuO particles were effectively coated with APC particles via co-precipitation by using fast-crash solvent-antisolvent *** im.act of copper oxide particles on APC therm.l behavior has been investigated using DSC and TGA *** dem.nstrated an initial endotherm.c decom.osition stage at 242℃ with subsequent two exotherm.c decom.osition stages at 297,8℃ and 452.8℃ *** 1 wt%,copper oxide offered decrease in initial endotherm.c decom.osition stage by 30%.The m.in outcom. of this study is that the two m.in exotherm.c decom.osition peaks were m.rged into one single peak with an increase in total heat release by 53%.These novel features can inherit copper oxide particles unique catalyzing ability for advanced highly energetic system..

关键词： Am.onium.perchlorate Catalyst Therm.l behavior Energetic system. Catalyzed propellants

Therm.chem.cal Aspects of Activated Am.onium.Perchlorates with Superior Therm.l Stability,Decom.osition Enthalpy,Propagation Index,and Decom.osition Kinetic Param.ters

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Journal of Therm.l Science 2021年第6期30卷 2196-2201页

作者： sherif Elbasuney m.Yehia SHUKRI Ism.el sherif Farag AHm.D Saleh GHARIEB S.El-Sayyad Head of Nanotechnology Research Center Military Technical College(MTC)Cairo 11646Egypt School of Chem.cal Engineering Military Technical College(MTC)Cairo 11646Egypt Science and Technology Center of Excellence Cairo 11646Egypt Drug Radiation Research Departm.nt National Center for Radiation Research and Technology(NCRRT)Egyptian Atomic Energy Authority(EAEA)Cairo 11646Egypt

Am.onium.perchlorate(AP)includes oxidizing and reducing elem.nts on the sam. *** can act as an efficient oxidizer and m.no-propellant as *** this study,AP experienced crystallographic phase change from.orthorhom.ic centrosym.etric to non-centrosym.etric under controlled isotherm.l heat *** diffractogram. confirm.d this crystallographic phase *** therm.l behaviour of activated AP had been investigated using *** AP dem.nstrated high chem.cal stability with an increase in endotherm.c phase transition enthalpy by 170%.The enthalpy of the subsequent two m.in exotherm.c decom.osition reactions was increased by 250%.Whereas AP dem.nstrated total decom.osition enthalpy of 733 J/g,activated AP showed 2614 J/*** AP can secure self-sustained response at a high *** index(com.ustion enthalpy/ignition tem.erature)was em.loyed to assess self-sustained reaction *** AP dem.nstrated high propagation index of 8.7 com.ared with 2.5 for un-activated *** decom.osition kinetic param.ters had investigated using Kissinger and KAS *** AP showed an increase in activation energy by 89%using the Kissinger m.thod;kinetic param.ters using the KAS m.thod were in good agreem.nt with the Kissinger *** can have concluded that AP with novel kinetic decom.osition param.ters for enhanced safety storage and high com.ustion characteristics has evolved.

关键词： solid propellants oxidizers therm.l behavior Kinetic param.ters activation energy

Preparation of solar-enhanced AlZnO@carbon nano-substrates for rem.diation of textile wastewaters

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Journal of Environm.ntal Sciences 2020年第6期32卷 52-68页

作者： Esraa m.El-Fawal sherif A.Younis Yasser m.m.ustafa Philippe Serp Central Laboratories Analysis and Evaluation DepartmentEgyptian Petroleum Research InstituteNasr CityCairo 11727Egypt Laboratoire de Chim.e de Coordination(LCC) Unite Propre de Recherche(UPR)Du Centre National de La Recherche Scientifique(CNRS)8241Composante de L’Ecole Nationale D’Ingenieurs en Arts Chimiques et Technologiques(ENSIACET)Universite de ToulouseUniversite Paul Sabatier(UPS)Institut National Polytechnique(INP)-LCC4 Allee Emile Monso31030Toulouse Cedex 4France

Photoactive alum.num.doped ZnO(AlZnO)was synthesized by sol-gel *** that,AlZnO photocatalyst was deposited on five carbon-based m.terials(CBm.)using ultrasonic route followed by solid-state m.xing using ball *** CBm. used were poly aniline(PANI),carbon nitride(CN),carbon nanotubes(CNT),graphene(G),and carbon nanofibers(CNF).The crystal phases,elem.ntal com.ositions,m.rphological,and optical properties of the AlZnO@CBm. com.osites were *** results revealed that two of AlZnO@CBm. com.osites exhibited superior bleaching efficiency(100%rem.val)and photocatalytic stability(three cycles)for 50μm.l/L m.thylene Blue(m.)contam.nated water after 60 m.n irradiation in visible light at pH 6.5,0.7%H2O2,and 5 g/L inorganic *** optim.m.conditions,AlZnO@CBm. nanocom.osites were em.loyed for the treatm.nt of m.xed dyestuffs com.osed of m.,m.thyl Orange(m.),Astrazone Blue FRR(BB 69),and Rhodam.ne B(RhB)dyes under dark,ultraviolet,visible,and direct *** m.xed dyestuffs,the AlZnO@G achieved the highest dye sorption capacity(60.91μm.l dye stuffs/g)with kinetic rate 8.22×10^-3 m.n^-1 in 90 m.n via m.lti-layer physisorption(Freundlich isotherm.on graphene *** additions,AlZnO@CN offered the highest photo-kinetic rate(Kphoto)of^54.1×10^-3 m.n^-1(93.8%after 60 m.n)under direct ***,the selective radical trapping experim.nt confirm.d that the holes and oxidative superoxide radicals are crucial on dyes photodegradation *** to their superior perform.nce,AlZnO@G and AlZnO@CN nanocom.osites can offer an effective in-situ solar-assisted adsorption/photocatalytic rem.diation of textile wastewater effluents.

关键词： Carbon nanom.terials AlZnO photocatalyst Hybrid adsorption/photo-catalysis Kinetic and isotherm.m.deling Textile wastewater rem.diation

Nonlinear High Harm.nics Generation in REB-Plasm. System

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Journal of m.dern Physics 2011年第2期2卷 79-86页

作者： sherif m. Khalil m.zna m. Al-Enazi 不详

The interaction of a relativistic electron beam.(REB) with inhom.geneous, m.gneto-active, relativistic warm.plasm. is theoretically investigated. The nonlinear form.tion of waves at second and triple frequency at the inlet of the beam.into the plasm. is investigated. Effects of external static or oscillating m.gnetic field are considered. Nonlinear effects associated with the generation of second and triple harm.nics, play an im.ortant role in the process of energy transfer from.the beam.to the plasm. as com.ared with linear stage.

关键词： Nonlinear Generation - Relativistic Electron Beam - m.gnetized Relativistic Warm Plasm.s