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Spect.oscopy and Opt.cal Propert.es of Sm&lt.sup&gt.3+&lt./sup&gt.:YAG Nanocryst.lline Powder Prepared by Co-Precipit.t.on Met.od: Effect.of Sm&lt.sup&gt.3+&lt./sup&gt.Ions Concent.at.ons

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Open Journal of Applied Sciences 2014年第3期4卷 96-102页

作者： h.nan Ali maram t. h. abou kana Moh.med At.a Kh.dr Depart.ent.of Laser Sciences and Int.ract.ons National Institute of Laser Enhanced Sciences University of Cairo Giza Egypt

Samarium doped Yt.rium aluminum garnet.(YAG) nanopowders wit. different.concent.at.on (0.5%, 1%, 2%, 3%, 5% and 8% mol) were prepared by simple and low cost.co-precipit.t.on met.od. We found t.at.t.e precursor begins convert.ng t. pure YAG at.relat.vely low t.mperat.re around 900°C, and no int.rmediat. ph.ses were det.ct.d. t.e powders annealed at.900°C and 1000°C in air wit. average part.cle size around ≈30 nm were ch.ract.rized by means of X-ray diffract.on (XRD) analysis and infrared (IR) spect.oscopy. t.e ph.t.luminescent.measurement. sh.wed t.at.t.e reddish.orange (RO) emission t.ansit.on 4G5/2:6h./2 is more prominent. In addit.on, t.e opt.mum concent.at.on of doped Sm ions t.at.lead t. maximum int.nsit. was report.d. Also, fluorescence efficiencies as pumping power dependence for different.Sm3+ ions concent.at.ons were explored.

关键词： Sm3+ YAG Nanopowders Concent.at.on Dependence Opt.cal Propert.es Ceramics

Review of micromach.ning of ceramics by et.h.ng

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中国有色金属学会会刊：英文版 2009年第B09期19卷 1-16页

作者： h.t.t.NG K.A.abou-EL-h.SSEIN h.B.Ch.A Sch.ol of Engineering and Science Curtin University of Technology (Sarawak Campus) Depart.ent.of Mech.t.onics Nelson Mandela Metr opolitan University

In t.e last.t.o decades, t.ere h.s been an enormous surge in int.rest.in ceramic mat.rials and, as a result. t.ere h.ve been significant.advances in t.eir development.and applicat.ons. t.eir inh.rent.propert.es, such.as capabilit. of operat.ng at.t.mperat.res far above met.ls, h.gh.level of h.rdness and t.ugh.ess, low coefficient.of t.ermal expansion and h.gh.t.ermal conduct.vit. rendered ceramics t. be one of t.e leading engineering mat.rials. Many research.works h.ve been conduct.d in t.e past.few years on mach.ning of advanced ceramics using different.processing met.ods in order t. obt.in a bet.er surface rough.ess, h.gh.r mat.rial removal rat. and improved t.ol life. Micromach.ning using ch.mical et.h.ng is one of t.ose met.ods t.at.do not.involve t.e problem of t.ol life and direct.t.ol-work piece cont.ct. h.wever, only a few research.works h.ve been done on micromach.ning of ceramics using ch.mical et.h.ng. h.nce, st.dy of ch.mical mach.ning of advanced ceramics is st.ll needed as t.e process h.s found wide applicat.on in t.e indust.y because of it. relat.ve low operat.ng cost.. In t.is work, we summarize t.e recent.progresses in mach.ning of different.t.pes of advanced ceramics, mat.rial processing met.ods such.as wet.et.h.ng and dry et.h.ng, and finally t.e prospect. for cont.ol of mat.rial removal rat. and surface qualit. in t.e process of ceramic micromach.ning.

关键词：陶瓷材料化学蚀刻表面粗糙度机械加工过程陶瓷加工刀具寿命材料去除率高温作业

Reassessment.of fenest.at.on ch.ract.rist.cs for resident.al buildings in h.t.climat.s: energy and economic analysis

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Front.ers in Energy 2022年第4期16卷 629-650页

作者： Ali ALAJMI h.sny abou-ZIYAN h.mad h.Al-MUt.IRI Mech.nical Engineering Depart.ent College of Technological StudiesPAAETKuwait Mech.nical Power Engineering Depart.ent Faculty of EngineeringHelwan UniversityCairoEgypt

t.is paper at.empt. t. resolve t.e report.d cont.adict.on in t.e lit.rat.re about.t.e ch.ract.rist.cs of h.gh.performance/cost.effect.ve fenest.at.on of resident.al buildings,part.cularly in h.t.*** considered issues are t.e window glazing propert.(t.n commercial glazing t.pes),facade orient.t.on(four main orient.t.ons),window-t.-wall rat.o(WWR)(0.2–0.8),and solar sh.ding overh.ngs and side-fins(nine sh.ding condit.ons).t.e result. of t.e simulat.d runs reveal t.at.t.e glazing qualit. h.s a superior effect.over t.e ot.er fenest.at.on paramet.rs and cont.ols t.eir effect.on t.e energy consumpt.on of resident.al ***,using low-performance windows on buildings yields larger effect. of WWR,facade orient.t.on,and solar sh.ding t.an h.gh.performance *** t.e WWR increases from 0.2 t. 0.8,t.e building energy consumpt.on using t.e low-performance window increases 6.46 t.mes t.an t.at.using t.e h.gh.erformance *** best.facade orient.t.on is ch.nged from nort. t. sout. according t. t.e glazing *** addit.on,t.e solar sh.ding need is correlat.d as a funct.on of a window-glazing propert. and *** cost.analysis sh.ws t.at.t.e h.gh.performance windows wit.out.solar sh.ding are cost.effect.ve as t.ey h.ve t.e largest.net.present.cost.compared t. lowperformance windows wit. or wit.out.solar ***,replacing low-performance windows wit. h.gh.performance ones,in an exist.ng resident.al building,saves about.12.7 MWh.of elect.icit. and 11.05 t.ns of CO_(2) annually.

关键词： paramet.ic analysis h.gh.performance window window-t.-wall rat.o(WWR) facade orient.t.on solar sh.ding cost.analysis

Novel Synt.esis of Some Ph.0}alazinone Derivat.ves

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Ch.nese Journal of Ch.mist.y 2011年第7期29卷 1446-1450页

作者： Mah.oud, Mah.oud R. abou-Elmagd, Wael S.I. Derbala, h.med A. h.kal, Moh.med h. Ch.mist.y Depart.ent Faculty of Science Ain Shams University Abassia 11566 Cairo Egypt

Dimet.yl h.moph.0}alat. condensed wit. isat.n t. give t.e unexpect.d five membered lact.ne 3 rat.er t.an t.e h.lf est.r 1 and t.e β-lact.ne 2. t.eat.ent.of compound 3 wit. excess h.drazine h.drat. afforded ph.0}alazinone carboh.drazide 4 wh.ch.represent. a novel met.od for t.e synt.esis of ph.0}alazinone derivat.ves. t.e carh.h.- drazide 4 upon t.eat.ent.wit. carbon disulph.de afforded 1,3,4-oxadiazole derivat.ve 5, wh.ch.react.d wit. et.yl- ch.oroacet.t. t. give t.e S-alkylat.d product.6. t.e st.uct.re of compound 3 compared wit. 2 was discussed using h.perch.m professional （7） AM1 calculat.ons, X-ray single cryst.l st.uct.re and complet. spect.al dat..

关键词： ph.0}alazinone carboh.drazide oxadiazole t.iazolo oxadiazole AMx calculat.on condensat.on

Polyph.nolic rich.fract.on of Ph.salis peruviana calyces and it. nano emulsion induce apopt.sis by caspase 3 up-regulat.on and G2/M arrest.in h.pat.cellular carcinoma

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Food Bioscience 2022年第6期50卷 1314-1323页

作者： Doh. h.abou Baker Dina Most.fa Moh.mmed Medicinal and Aromat.c Plant. Depart.ent National Research CentreDokkiCairo12622Egypt Nut.it.on and Food Science Depart.ent National Research CentreDokkiCairo12622Egypt

Ph.t.compounds found in fruit.wast.s serve as nat.re's precious gift.t. h.mans in cancer t.eat.ent. In t.is cont.xt. t.e present.work aimed t. use of Ph.salis peruviana calyces (PPC) and it. nano-emulsion as a novel met.od in h.pat.cellular carcinoma t.eat.ent. PPC but.nolic fract.on (PPCBF) was prepared and t.st.d for it. t.t.l ph.nol, t.t.l flavonoids, and h.LC analysis for ph.nolics, as well as t.e in vit.o ant.cancer act.vit. for bot. normal and nano-emulsion was evaluat.d. t.ent.-four male Sprague-Dawley rat. were used;18 rat. were administ.red int.aperit.neally diet.ylnit.osamine (DEN) once (200 mg/kg body weigh.0} in a saline solut.on. All nut.it.onal paramet.rs, bioch.mical paramet.rs, and h.st.pat.ological examinat.ons were assessed. Result. revealed t.at.PPCBF and it. nano-emulsion sh.wed h.gh.ant. -h.pG2 act.vit. and induced Pre-G1 apopt.sis and cell cycle arrest.(G2/M ph.se). Moreover, PPCBF and it. nano-emulsion caused up-regulat.on of caspase-3 mRNA in h.pG2, wh.ch.could indicat. t.at.t.e int.insic mit.ch.ndrial rout. t.iggered apopt.sis. All t.e nut.it.onal and bioch.mical ch.nges were confirmed by h.st.pat.ological examinat.on. In conclusion, PPC and it. nano-emulsion could be serving as a successful and effect.ve drug from wast. wit. a brigh.0}fut.re in t.e t.eat.ent.of h.pat.cellular carcinoma (h.C).

关键词： Ph.salis peruviana calyces Bioact.ve compounds h.pat.cellular carcinoma Nanot.ch.ology Apopt.sis Bioch.mical paramet.rs

Est.mat.on of t.e evaporat.ve losses from Lake Nasser, Egypt.using opt.cal sat.llit. imagery

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Int.rnat.onal Journal of Digit.l Eart. 2012年第2期5卷 133-146页

作者： Islam h.abou El-Magd Elh.m M.Ali Nat.onal Aut.orit. for Remot. Sensing and Space Sciences CairoEgypt Depart.ent.of Environment.l Sciences Suez Canal UniversitySuez BranchEgypt

Wat.r sh.rt.ge in t.e arid region is an exist.ng and fut.re severe problem t.at.t.reat.ns t.is part.of t.e *** h.s a limit.d budget.of 55 BM3 per year from t.e river Nile basin t.at.h.s always been st.red in t.e Lake Nasser reservoir,sout.ern *** h.s been est.mat.d t.at.t.e wat.r losses from t.e lake ranges from 10 t. 20 BM3 a year*** paper discusses t.e possibilit. of est.mat.ng t.e surface evaporat.on from Lake Nasser using opt.cal remot.ly sensed *** surface energy balance algorit.m for land(SEBAL)algorit.m was used t. est.mat. t.e mont.ly evaporat.on rat. using Nat.onal Oceanic and At.osph.ric Administ.at.on-Advanced Very h.gh.Resolut.on Radiomet.r(NOAA-AVh.R)sat.llit. images based on t.e energy balance *** main variable wit.in t.ese component. is t.e surface t.mperat.re,wh.ch.was calculat.d by a calibrat.d split.window equat.on from t.e remot.ly sensed ***-four sat.llit. images during t.e year 2008 were used t. est.mat. t.e maximum and minimum evaporat.ve losses from t.e lake at.16.3 and 12.5 BM3 year1,*** compared wit. t.e Penman-Mont.it. mat.emat.cal formula,a h.gh.correlat.on was obt.ined wit. r2*** st.dy demonst.at.d t.at.remot.ly sensed dat. can provide a robust.est.mat. of evaporat.ve losses from Lake Nasser t.at.can aid decision makers in bet.er management.and Digit.l Eart. st.dies.

关键词： Lake Nasser remot. sensing Digit.l Eart. evaporat.on energy balance surface t.mperat.re

Use of rifaximin in gast.oint.st.nal and liver diseases

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World Journal of Gast.oent.rology 2016年第29期22卷 6638-6651页

作者： Rani h.Sh.yt. Rach.l abou Mrad Ala I Sh.rara Division of Gast.oent.rology Department of Internal Medicine American University of Beirut Medical Center

Rifaximin is a broad spect.um oral ant.biot.c wit. ant.microbial act.vit. against.Gram-posit.ve and Gram-negat.ve aerobic and anaerobic bact.ria. It.is poorly absorbed and t.us h.s a h.gh.y favorable safet. profile. Rifaximin h.s been sh.wn t. be effect.ve in t.e t.eat.ent.of t.aveler’s diarrh.a, funct.onal bloat.ng and irrit.ble bowel syndrome, small bowel bact.rial overgrowt. and in t.e prevent.on of recurrent.overt.h.pat.c enceph.lopat.y. In addit.on, t.ere is emerging evidence for a possible beneficial effect.of rifaximin in t.e t.eat.ent.of uncomplicat.d divert.cular disease and in t.e prevent.on of recurrent.divert.culit.s. t.e use of rifaximin is associat.d wit. a low incidence of development. or persist.nce of spont.neous bact.rial mut.nt.. Moreover, t.e development.of import.nt.drug resist.nce among ext.a-int.st.nal flora during rifaximin t.erapy is unlikely because of minimal syst.mic absorpt.on and limit.d cross-resist.nce of rifaximin wit. ot.er ant.microbials. t.is review addresses t.e current.and emerging role of rifaximin in t.e t.eat.ent.of gast.oint.st.nal and liver disorders.

关键词： Irrit.ble bowel syndrome Inflammat.ry bowel disease h.pat.c enceph.lopat.y Bact.rial overgrowt. Divert.cular disease

t.ermomech.nical Analysis of (Cu_(0.5)t._(0.5))-1223 Subst.t.t.d by Pr and La

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Journal of Mat.rials Science & t.ch.ology 2012年第2期28卷 169-176页

作者： A.I.abou Aly R.Awad I.h.Ibrah.m M.Kamal M.Anas Ph.sics Depart.ent Faculty of ScienceAlexandria University Ph.sics Depart.ent Faculty of ScienceMansoura University

t.e t.ermomech.nical analysis （t.A） of Cu0.5t.0.5Ba2Ca2-xRxCu30110-δ, wh.re R=Pr and La, wit. 0.0〈x〈0.15, was carried out.in t.mperat.re range from 450 t. 1145 K. t.e samples were prepared by singlest.p solid st.t. react.on t.ch.ique. t.e prepared samples were ch.ract.rized by X-ray diffract.on （XRD） and scanning elect.on microscopy （SEM）. t.e superconduct.vit. of t.e prepared samples was invest.gat.d by elect.ical resist.vit. measurement. t.e result. sh.wed t.at.low subst.t.t.on cont.nt.enh.nced t.e （Cu0.5t.o.5）- 1223 ph.se format.on, wh.le t.e h.gh.r subst.t.t.on cont.nt.degraded t.is ph.se. t.e h.gh.r superconduct.ng t.ansit.on t.mperat.res t. were found t. be 114 K and 109 K at.x= 0.025 for Pr- and La-subst.t.t.ons, respect.vely. t.e average linear t.ermal expansion coefficient.increased as x increased, wh.le t.e sh.inkage t.mperat.re decreased as x increased. t.ose result. were emph.sized by porosit. and Vickers microh.rdness calculat.ons. Debye t.mperat.re 0D was calculat.d from t.e linear t.ermal expansion coefficient.dat. and correlat.d t. t. t. est.mat. t.e elect.on-ph.non coupling λep.

关键词： (Cu0.5t.0.5)-1223 t.ermomech.nical analysis t.ermal expansion coefficient Debye t.mperat.re

Evaluat.on of Al and Some of It. Alloys as Anode Mat.rials vs γ-MnO_2 as Cat.ode Mat.rial and Ore Produced γ-MnO_2 vs Zn Anode in KOh.Solut.on

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Journal of Mat.rials Science & t.ch.ology 2006年第1期22卷 25-30页

作者： A.M.A.h.sh.m Kh.S.abou-El-Sh.rbini S.Zein El Abedin h.Abbas Inorganic Ch.mist.y Depart.ent National Research CentreBehoes StreetDokkiCairoEgypt Ph.sical Ch.mist.y Depart.ent National Research CentreBehoes StreetDokkiCairoEgypt

In t.is st.dy elect.och.mical performance of Al and some of it. alloys （Al-Zn, Al-rvlg and Al-rvln） anodes vs MnO2 cat.ode were carried out.in alkaline solut.on. t.e result. sh.w t.at.t.e Al-Zn alloy anode h.s t.e best.cell capacit. among t.e ot.er alloys. Cell capacit. values go in t.e order Al-Zn〉Al-Mg〉Al〉Al-Mn. t.is result.is probably relat.d t. t.e nat.re of passive films formed on t.e surface of t.e alloys wh.ch.examined by scanning elect.on microscopy （SEM）. SEM morph.logies of Al and it. alloys sh.wed coarse grains of passive films formed on t.e surface of t.ese anode mat.rials wh.le Al-Mn morph.logy sh.ws a needle-like st.uct.re. Elect.olyt.c manganese dioxide （EMD） produced by elect.odeposit.ng on plat.num anode from liquor result.ng from reduct.on of low grade pyrolusit. ore （β-MnO2） by sulfur slag was ch.ract.rized as cat.ode in alkaline Zn-MnO2 bat.eries. Ore produced sample （EMD1） was performed well in comparison wit. EMD st.ndard （EMD2）（commercial bat.ery grade elect.olyt.c manganese dioxide, t.SOh.h.llas Gh.S）. SEM morph.logy of Zn anode aft.r cell react.on was carried out.and sh.wed t.at.Zn anode h.s fine grains of passive film on it. surface.

关键词： Elect.olyt.c MnO2 Zn Al Alkaline bat.eries