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Chinese Journa. of Chemistry 2012年第1期30卷 77-83页

作者： EI-Sa.ed, Wa.l a. a.i, Oma. M hendy, hend a.abdei-rahman, adel a.-h.t Depa.tment of Ph.tochemistry National Research Centre Cairo Egypt Chemistry Depa.tment Northern Border University Afar Saudi Arabia Depa.tment of Chemistry Faculty of Science Menoufia University Shebin El-Koam Egypt

a.series of new 2,5-disubstituted-l,3,4-oxa.ia.ole a.d 1,2,4-tria.ole deriva.ives were synthesized by h.tero- cycliza.ion of a.id hydra.ide I a.d thiosemica.ba.ide deriva.ive 2. Furthermore, the a.yclic C-nucleoside a.a.ogs were prepa.ed by cycliza.ion of their corresponding suga. hydra.ones by rea.tion with a.etic a.hydride. the a.timicrobia. a.tivity of the prepa.ed compounds wa. eva.ua.ed a.d some of the synthesized compounds revea.ed good a.tivities a.a.nst fungi.

关键词： 1,3,4-oxa.ia.oles 1,2,4-tria.oles suga. hydra.ones a.yclic nucleosides a.timicrobia. a.tivity

therma. 9h.t Noise through Bounda.y Roughness of Ca.bon Na.otube Qua.tum Dots

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Chinese Physics Letters 2011年第1期28卷 186-189页

作者： a.tia.a. a.a.a.la.adel h. Phillips Depa.tment of Physics Faculty of Science Beni-Suef University Beni-Suef Egypt Depa.tment of Engineering Physics a.d Ma.hema.ics Faculty of Engineering Ain Shams University Cairo Egypt

therma. sh.t noise, therma. volta.e a.d thermo power a.e studied through a.ca.bon na.otube qua.tum dot coupled to two lea.s with ra.dom roughness of a.plitude on ea.h of the two bounda.ies, under the effect of microwa.e field, a.d ma.netic field. the expressions for the therma. sh.t noise a.d therma. energy a.e deduced when the ba.rier strength a.d conta.t a.ea.a.e ta.en into considera.ion. a.model for such mesoscopic devices is proposed a. a.ca.bon na.otube qua.tum dot coupled to two lea.s with ra.dom roughness of a.plitude on ea.h of the two bounda.ies. the results show oscilla.ory beha.iors of the dependence of the therma. sh.t noise on the studied pa.a.eters. the thermopower oscilla.es with.the va.ia.ion of the conta.t a.ea. a.d the pea. heights decrea.e linea.ly with.the conta.t a.ea.a.d increa.es with.tempera.ure. this trend of beha.ior is due to the interpla. of the induced microwa.e ph.tons a.d the tunneling ra.e through.the side ba.ds. this resea.ch is importa.t for using a.model a. a.high-frequency sh.t noise detector a.d the thermopower is sensitive to the energy dependence of the conducta.ce.

关键词： Noise Energy Ca.bon Lea. Ca.bona.es Ca.bona.ion Models Bounda.ies Fields

thermodyna.ics Properties of Mesoscopic Qua.tum Na.owire Devices

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Chinese Physics Letters 2007年第5期24卷 1339-1341页

作者： a.tia.a. a.a.a.la.adel h. Phillips Depa.tment of Physics Faculty of Science Beni-Suef University Beni-Suef Egypt Depa.tment of Physics a.d Depa.tment of Ma.hema.ics Faculty of Engineering Ain Shams University Egypt

We investiga.e the thermodyna.ics properties of mesoscopic qua.tum na.owire devices, such a. the effect of electron-phonon rela.a.ion time, Peltier coefficient, ca.rier concentra.ion, frequency of this field, a.d cha.nel width. the influence of time-va.ying fields on the tra.sport through such device ha. been ta.en into considera.ion. this device is modelled a. na.owires connecting to two reservoirs. the two-dimensiona. electron ga. in a.Ga.s- a.Ga.s h.terojunction ha. a.Fermi wa.e length which is a.hundred times la.ger tha. th.t in a.meta.. the results show the oscilla.ory beha.iour of dependence of the thermo power on frequency of the induced field. these results a.ree with.the existing experiments a.d ma. be importa.t for electronic na.odevices.

关键词： thERMOPOWER tRa.SPORt

Burden of pedia.ric influenza.a.virus infection post swine-flu h1N1pa.demic in Egypt

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a.ia. Pa.ific Journa. of tropica. Medicine 2013年第9期6卷 693-698页

作者： adel Kh.tta. Ma.a. Sha.een terez Ka.el a.el El Fa.a.a. Sa.a. a.d El rahman Da.ia.Na.il Moha.ed Gouda Influenza.a.visory Boa.d Egyptia. Ministry of hea.th Chest Depa.tment Faculty of MedicineAin Shams University Pedia.rics Depa.tment Faculty of MedicineAin Shams University Medica. Microbiology a.d Immunology Depa.tment Faculty of MedicineAin Shams University

Objectne:to screen children with influenza.like illness or with symptoms of a.ute respira.ory tra.t infections for influenza.a.virus infection-post swine flu pa.demic era.using ra.id influenza.dia.nostic ***:During two yea.,(2010&2011),1200 children with influenza.like illness or a.ute respira.ory tra.t infections(a.cording to World hea.th Orga.iza.ion criteria.were *** a.es ra.ged from 2-60 *** a.pira.es specimens were collected from a.l children for ra.id influenza.a.dia.nostic ***:Influenza.a.virus ra.id test wa. positive in 47.5%of the children;the ma.ority(89.6%)were presented with lower respira.ory tra.t *** ra.e a.d tempera.ure were significa.tly higher a.ong positive ra.id influenza.test ***:Influenza.a.virus infection is still a.ma.or ca.se of respira.ory tra.t infections in Egyptia. *** should be considered in a.l ca.es with cough a.d febrile episodes a.d influenza.like symptoms even post swine flu pa.demic.

关键词： Influenza A virus Burden Children Influenza like illness Egypt

Free vibra.ion a.d tra.sient response of double curved bea.s connected by intermedia.e stra.ght bea.s

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a.plied Ma.hema.ics a.d Mecha.ics(English Edition) 2025年第1期46卷 37-62页

作者： R.a.Ja.a.I-ta.OOKOLa.I h.Gha.DVa. E.JUMa.V S.Kh.tIR t.CUONG-LE School of Mecha.ica. Engineering Babol Noshirvani University of Technology Depa.tment of Mecha.ica. Engineering Faculty of Engineering New Uzbekistan University University of Business a.d Science Center for Engineering a.plica.ion a.d technology Solutions Ho Chi Minh City Open University

this pa.er investiga.es the free vibra.ion a.d tra.sient response of interconnected structures including double curved bea.s a.d intermedia.e stra.ght bea.s,which a.e a.l constructed from functiona.ly gra.ed porous(FGP) ma.eria.s. the stra.n potentia. a.d kinetic energies of ea.h bea. a.ong with.the work done by the externa. force a.e ca.cula.ed. a.ditiona.ly, a.higher-order bea. element is introduced to derive stiffness a.d ma.s ma.rices, a.ong with.the force vector. the curved a.d stra.ght bea.s a.e discretized, a.d their a.sembled stiffness, ma.s ma.rices, a.d force vectors, a.e *** conditions a. the joints a.e used to derive the tota. ma.rices of the entire structure. Subsequently, the na.ura. frequencies a.d tra.sient response of the system a.e determined. the a.cura.y of the ma.hema.ica. model a.d the self-developed computer progra. is va.ida.ed through.the compa.ison of the obta.ned results with.those of the existing litera.ure a.d commercia. softwa.e a.SYS, demonstra.ing excellent ***, a.comprehensive study is conducted to investiga.e the effects of va.ious pa.a.eters on the free vibra.ion a.d tra.sient response of the considered structure.

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Green Synthesis of Novel 5-a.yla.o-2-[(2S, 3S, 4R, 5R)-3, 4, 5-trihydroxy-6-(hydroxymethyl) tetra.ydro-2h-Pyra.-2-Yloxy]-4, 6-Dimethyl 3-Nicotinonitrile

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Interna.iona. Journa. of Orga.ic Chemistry 2017年第4期7卷 389-402页

作者： Ma.da.h. a.della.tif Moha.ed Moha.ed helmy a.ief adel a. h. a.del-rahman a.del-a.eem h. a.del a.eem a.del Monea. Fa.a. Eissa Dea.ship of Scientific Resea.ch Taif University Alhawaya Taif KSA Chemistry Depa.tment Faculty of Science Benha University Benha Egypt Chemistry Depa.tment Faculty of Science Menaufia University Shebin Elkom Egypt

Introduction: Pyridone deriva.ives pla.ed importa.t roles in the la.t deca.e to a.proa.h ma.y a.d different functiona.ities, especia.ly a. a.titumor, a.tiba.teria., a.ti-funga., a.d ma.y of pha.ma.ologica. a.tivities. Methodology: Novel compounds of 5-a.yla.o-2-[(substituted)-3, 4, 5-trihydroxy-6-(hydroxymethyl) tetra.ydro-2h-pyra.-2-yloxy]-4, 6-dimethylnicotinonitrile, (3a.e), genera.ly ca.led (fluroa.yla.opyridine glucosides) were synthesised via.green protocol, microwa.e. Results: the compounds were investiga.ed by (IR, 1hNMR, 13CNMR a.d ma.s spectrometry). Where some of pha.ma.ologica. a.tivities like a.tiba.teria. a.d a.tifunga. studies ha. been investiga.ed a.d cha.a.terized. It wa. found th.t 3a.d ha. cha.a.terized by high a.tivities a. a.tiba.teria. a.d a.tifunga.. Where microwa.e synth.tic methods were more efficient, ga.e higher products qua.tity, a.d more sa.ing for time requirement a.d for using of much more solvents.

关键词： Green Chemistry Green Protocol Pyridones Fluroa.o Compounds Microwa.e

Oxida.ive lea.hing kinetics of molybdenum-ura.ium ore in h2SO4 using h2O2 a. a. oxidizing a.ent

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Frontiers of Chemica. Science a.d Engineering 2013年第1期7卷 95-102页

作者： t. a. La.heen M. E. EI-a.ma.y h. B. ha.sib a. S. hela. Nuclea. Ma.eria.s a.thority Cairo Egypt Chemistry Depa.tment Faculty of Science Cairo University Giza Egypt

the processing of molybdenum-ura.ium ore in a.sulfuric a.id solution using hydrogen peroxide a. a. oxida.t ha. been investiga.ed. the lea.hing tempera.ure, hydrogen peroxide concentra.ion, sulfuric a.id concentra.ion, lea.hing time, pa.ticle size, liquid-to-solid ra.io a.d a.ita.ion speed a.l ha.e significa.t effects on the process. the optimum process opera.ing pa.a.eters were： tempera.ure： 95℃; h2O2 concentra.ion： 0.5 M; sulfuric a.id concentra.ion： 2.5 M; time： 2 h; pa.ticle size： 74 gm, liquid-to-solid ra.io： 14 ： 1 a.d a.ita.ion speed： 600 rpm. Under these experimenta. conditions, the extra.tion efficiency of molybdenum wa. a.out 98.4%, a.d the ura.ium extra.tion efficiency wa. a.out 98.7%. the lea.hing kinetics of molybdenum showed th.t the rea.tion ra.e of the lea.hing process is controlled by the chemica. rea.tion a. the pa.ticle surfa.e. the lea.hing process follows the kinetic model 1 - （1-X）1/3 = kt with a. a.pa.ent a.tiva.ion energy of 40.40 kJ/mole. the tempera.ure, concentra.ions of h202 a.d h2SO4 a.d the mesh size a.e the ma.n fa.tors th.t influence the lea.hing ra.e. the rea.tion order in h2SO4 wa. 1.0012 a.d in h202 it wa. 1.2544.

关键词： lea.hing of molybdenum lea.hing of ura.ium kinetics

La.ge signa. of h → μτ within the constra.nts of e_(i) → e_(j)γ deca.s in the 3-3-1 model with neutra. leptons

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Chinese Physics C 2022年第12期46卷 106-125页

作者： h.t.hung D.t.Binh h.V.Quyet Depa.tment of Physics Hanoi Pedagogical University 2Phuc YenVinh Phuc 15000Vietnam Institute of theoretica. a.d a.plied Resea.ch Duy Tan UniversityHanoi 10000Vietnam Fa.ulty of Na.ura. Science Duy Tan UniversityDa Nang 50000Vietnam

In the fra.ework of the 3-3-1 model with neutra. leptons,we investiga.e lepton-fla.or-viola.ing sources ba.ed on the higgs ma.s spectrum,which ha. two neutra. higgs identified with.the corresponding ones of the two-higgs-doublet *** note th.t a. the 13teV sca.e of the LhC,the pa.a.eter spa.e regions sa.isfy the experimenta. limits of e_(i)→e_(j)γ*** regions depend hea.ily on the mixing of exotic leptons but a.e predicted to ha.e la.ge h_(1)^(0)→μτ*** a.so show th.t Br(h_(1)^(0)→μτ)ca. rea.h a.va.ue of 10^(-4).

关键词： higgs boson electrowea. intera.tion beyond the SM LFV deca.s

a.comprehensive study on the processing of Co:ZnO na.ostructured cera.ics:Defect chemistry engineering a.d gra.n growth kinetics

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Journa. of Ma.eria.s Science & technology 2023年第7期138卷 221-232页

作者： R.t.da.Silva.J.M.Morbec G.rahman h.B.de Ca.va.ho Universida.e Federa. de Ouro Preto-UFOP Ouro PretoMG 35400-000Brazil School of Chemica. a.d Physica. Sciences Keele UniversityKeele ST55BGUnited Kingdom Depa.tment of Physics Quaid-i-Azam UniversityIslamabad 45320Pakistan Universida.e Federa. de a.fena.-UNIFa. Alfenas 37130-000Brazi

In this report,we present a.systema.ic study on the prepa.a.ion of Co:ZnO cera.ics via.a.sta.da.d solid-sta.e route from different Co precursors(Co_(3)O_(4),CoO,a.d meta.lic Co)a.d a.mospheres(O_(2)a.d a.).Pa.ticula. empha.is is given to defect chemistry engineering a.d the sintering growth ***-principles ca.cula.ions ba.ed on density functiona. theory a.e employed to determine the forma.ion en-ergy of the ma.n point defects in ZnO a.d Co:ZnO *** on the theoretica. results,a.set of chemica. rea.tions is *** microstructura. cha.a.teriza.ion is a.so performed to determine the degree of Co incorpora.ion into the ZnO *** sa.ples prepa.ed in a. a.mosphere a.d meta.-lic Co present the highest Co solubility limit(lower a.pa.ent Co incorpora.ion a.tiva.ion energy)due to the incongruent ZnO *** of the pa.a.eters of the sintering growth kinetics revea.s th.t Co_(3)O_(4)is the best sintering a.ditive to a.hieve la.ger gra.n sizes,a.d possible higher densi-ties,in both sintering a.mospheres,while meta.lic Co is the best to a.hieve the sma.lest gra.n size with higher Co concentra.ion a.d homogeneous spa.ia. distribution for a.subsequent reduction of *** results show th.t the sintering in O_(2)effectively promotes zinc va.a.cies in the ZnO structure,while the sintering in a. promotes zinc interstitia. *** findings contribute to understa.ding the prepa.a.ion of Co-doped ZnO cera.ics a.d the sintering growth kinetics,which ma. improve the sta.e of the a.t in processing the ma.eria. a. both bulk a.d na.ometric sca.es.

关键词： Multifunctiona.ity Zinc oxide Defect engineering Growth kinetics

Fa.o Fa.tor in Stra.ned Gra.hene Na.oribbon Na.odevices

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Chinese Physics Letters 2017年第11期34卷 114-118页

作者： Wa.id Solima. Mina.D.a.ha. adel h.Phillips Fa.ulty of Engineering Benha UniversityBenhaEgypt Fa.ulty of Engineering AinShams UniversityCairoEgypt

We investiga.e the Fa.o fa.tor in a.stra.ned a.mcha.r a.d zigza. gra.hene na.oribbon na.odevice under the effect of a. field in a.wide ra.ge of frequencies a. different tempera.ures （10？K–70？K）. this na.odevice is modeled a. follows： a.gra.hene na.oribbon is connected to two meta.lic lea.s. these two meta.lic lea.s opera.e a. a.source a.d a.dra.n. the conducting substa.ce is the ga.e electrode in this three-termina. na.odevice. a.other meta.lic ga.e is used to govern the electrosta.ics a.d the switching of the gra.hene na.oribbon cha.nel. the substa.ces a. the gra.hene na.oribbon/meta. conta.t a.e controlled by the ba.k ga.e. the ph.ton-a.sisted tunneling proba.ility is deduced by solving the Dira. eigenva.ue differentia. equa.ion in which.the Fa.o fa.tor is expressed in terms of this tunneling proba.ility. the results show th.t for the investiga.ed na.odevice, the Fa.o fa.tor decrea.es a. the frequency of the induced a. field increa.es, while it increa.es a. the tempera.ure increa.es. In genera., the Fa.o fa.tors for both stra.ned a.mcha.r a.d zigza. gra.hene na.oribbons a.e different. this is due to the effect of the unia.ia. stra.n. It is shown th.t the ba.d structure pa.a.eters of gra.hene na.oribbons a. the energy ga., the C–C bond length, the hopping integra., the Fermi energy a.d the width a.e modula.ed by unia.ia. stra.n. this resea.ch gives us a.promise of the present na.odevice being used for digita. na.oelectronics a.d sensors.

关键词： Fa.o Fa.tor in Stra.ned Gra.hene Na.oribbon Na.odevices