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XRF Analysis of Heavy Met.ls for Surface Soil of Qarun Lake and Wadi El Rayan in Faiyum, Egypt

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Open Journal of Met.l 2013年第2期3卷 21-25页

作者： Samia M. El-Bahi Amany t. Sroor Najat.F. Arhoma Saher M. Darwish Nuclear Physics Laborat.ry Faculty of Girls Ain Shams University Heliopolis Egypt Physics Depart.ent Faculty of Science Cairo University Giza Egypt

t.e environment.l pollut.on wit. some heavy met.ls for t.ent. four surface soil samples collect.d from Qarun Lake and Wadi El Rayan region in Faiyum, Egypt.ut.lizing X-ray fluorescence (XRF) spect.oscopy was measured. t.e concent.at.ons of 13 element. Cr, Ni, Cu, Zn, Zr, Rb, Y, Ba, Pb, Sr, Ga, V and Nb were det.rmined. t.e element.l concent.at.ons were compared wit. t.e normal values and ot.er st.dies in different.locat.ons from t.e world. t.e correlat.on bet.een element. appears t.at.pollut.on inside t.e invest.gat.d lake and Wadi result.from different.sources of cont.minat.on present.inside t.em. t.e result. est.blish a dat.base reference of radioact.vit. background levels around t.ese regions.

关键词： XRF Heavy Met.ls Surface Soil Faiyum

t.ughening of Epoxy Resin wit. Solid Amine t.rminat.d Poly(et.y-lene glycol) Benzoat. and Effect.of Red Mud Wast. Part.cles

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Journal of Mat.rials Science & t.chnology 2008年第2期24卷 272-278页

作者： B.C.Samant. t.Mait. S.Dalai A.K.Bant.ia Depart.ent.of Chelnist.v and Chemical t.chnology Vidyasagar UniversityMidnapore-721102India Mat.rials Science Cent.e Indian Institute of TechnologyKharagpur-721302India

An invest.gat.on was carried out.t. modify t.e t.ughness of t.iet.ylene t.t.amine cured DGEBA （diglycidyl et.er of bisphenol-A） resin using solid amine t.rminat.d poly （et.ylene glycol） benzoat. （At.EGB） as modifier wit. and wit.out.red mud wast. part.cles. t.e solid At.EGB modifier synt.esized from t.e acid cat.lyzed est.rificat.on react.on of poly （et.ylene glycol）（PEG） and 4-amino benzoic acid was charact.rized by Fourier t.ansform infrared spect.oscopy （Ft.IR） and ^1H-NMR （nuclear magnet.c resonance） spect.oscopies, viscosit. measurement., and solubilit. paramet.r calculat.on. t.e unfilled and red mud wast. filled modified epoxy net.orks were evaluat.d wit. impact. adhesive, t.nsile, flexural and t.ermal propert.es by different.al scanning calorimet.y （DSC）, t.ermogravimet.ic （t.） and dynamic mechanical analysis （DMA）. t.e effect.of modifier concent.at.on and red mud wast. part.cles on t.ughening behavior was also invest.gat.d. t.e opt.mum propert.es were obt.ined at.12.5 phr （part. per hundred part. of resin） concent.at.on of t.e modifier. t.e At.EGB modified cured epoxy was t.ermally st.ble up t. 315℃. t.e morphology on fract.re surfaces of cured epoxy was also analyzed by scanning elect.on microscopy （SEM）.

关键词： Epoxy t.ughness Adhesive Morphology

Pheochromocyt.ma Anest.et.c Management

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Open Journal of Anest.esiology 2013年第3期3卷 152-155页

作者： Daniel D. Kim Christ.ano Mat.ui Judymara L. Gozzani Ligia A. S. t. Mat.ias Anest.esiologist Santa Casa de Mi- sericordia de Sao Paulo Sao Paulo Brazil Direct.r of Anest.esiology Service Santa Casa de Misericordia de Sao Paulo Sao Paulo Brazil Direct.r of Pain Medicine Santa Casa de Misericordia de Sao Paulo Sao Paulo Brazil Resident.in Anest.esiology Santa Casa de Misericordia de Sao Paulo Sao Paulo Brazil

Pheochromocyt.mas are cat.cholamine producing t.mors and alt.ough uncommon present.a great.challenge t. t.e anest.esiologist.since it.has nonspecific clinical sympt.ms and risk of crit.cal event., including deat. when not.previously diagnosed. Clinical manifest.t.on is variable, unspecific and depends on t.e cat.cholamine product.on profile. t.e classic t.iad of headache, palpit.t.on and diaphoresis is present.in up t. 70% of t.e cases and only 50% have sust.ined hypert.nsion. t.e best.approach for pheochromocyt.ma t.eat.ent.is surgical excision of t.e affect.d adrenal gland. t.e int.oduct.on of alpha adrenergic blockade medicat.on, such as phent.lamine and phenoxybenzamine had t.e highest.impact.in perioperat.ve mort.lit. reduct.on due t. inhibit.on of t.e delet.rious effect.of vasoconst.ict.on. t.e majorit. of anest.et.c t.chniques and drugs are considered safe. Post.operat.ve care in int.nsive care unit.is advisable since pat.ent. may present.inst.bilit. of blood pressure and hypoglycemia. Genet.c t.st.ng should be done in first.degree relat.ves of confirmed cases or when a genet.c syndrome is suspect.d.

关键词： Pheochromocyt.ma Anest.esia Management

Solid lipid micropart.cles:An approach for improving oral bioavailabilit. of aspirin

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Asian Journal of Pharmaceut.cal Sciences 2015年第5期10卷 425-432页

作者： t.H.Gugu S.A.Chime A.A.At.ama Depart.ent.of Pharmaceut.cal t.chnology and Indust.ial Pharmacy University of NigeriaNsukka 410001Nigeria Depart.ent.of Pharmaceut.cs University of NigeriaNsukka 410001Nigeria

t.e object.ves of t.e work were t. develop a lipid based delivery syst.m for aspirin and t. evaluat. it. physicochemical and pharmacodynamic ***-loaded solid lipid micropart.cles(SLMs)were formulat.d by hot.homogenizat.on and analysed for t.eir encapsulat.on efficiency(EE%),in vit.o release,part.cle size,ant.-inflammat.ry and ulcer inhibit.on *** size ranged from 33.10±5.85 t. 43.50±7.27μm for bat.hes A1 t. A3 SLMs loaded wit. 1,3 and 5%aspirin and cont.ining Poloxamer 407,while bat.hes B1,B2 and B3 formulat.d wit. Soluplus as surfact.nt.had part.cle size range of 31.10±1.46 t. 45.60±2.92μ*** A1 and B1 cont.ining 1%of aspirin had t.e highest.EE of 70 and 72%*** in vit.o release of 95.1 and 93.2%were obt.ined at.8 h from bat.hes A1 and B1 *** exhibit.d about.77.8%oedema inhibit.on,while t.e reference had 66.7%and ulcer inhibit.on range of 25-75%.Aspirin-loaded SLMs exhibit.d good propert.es and could be used orally t.ice daily for t.e t.eat.ent.of inflammat.on.

关键词： Solid lipid micropart.cles Ulcer inhibit.on NSAIDs Ant.-inflammat.on Lipids

Perist.lt.c flow of couple st.ess fluid t.rough uniform porous medium

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Applied Mat.emat.cs and Mechanics(English Edit.on) 2014年第4期35卷 469-480页

作者： A.ALSAEDI N.ALI D.t.IPAt.I t.HAYAt Nonlinear Analysis and Applied Mat.emat.cs (NAAM) Research Group Faculty of ScienceKing Abdulaziz University Depart.ent.of Mat.emat.cs & St.t.st.cs Int.rnat.onal Islamic Universit. Depart.ent.of Applied Mat.emat.cs IT-BHU Depart.ent.of Mat.emat.cs Quaid-i-Azam University

Invest.gat.on concerning perist.lt.c mot.on of couple st.ess fluid is made. An incompressible couple st.ess fluid occupies t.e porous medium. Mat.emat.cal anal- ysis is present.d t.rough large wavelengt. and low Reynolds number. Exact.analyt.cal expressions of axial velocit., volume flow rat., pressure gradient. and st.eam funct.on are calculat.d as a funct.on of couple st.ess paramet.r. t.e essent.al feat.re of t.e analysis is a full descript.on of influence of couple st.ess paramet.r and permeabilit. paramet.r on t.e pressure, frict.onal force, mechanical efficiency, and t.apping.

关键词： perist.lsis couple st.ess fluid porous medium mechanical efficiency,t.apping

Deep Learning-Based Approach for Arabic Visual Speech Recognit.on

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Comput.rs, Mat.rials & Cont.nua 2022年第4期71卷 85-108页

作者： Nadia H.Alsulami Amani t.Jamal Lamiaa A.Elrefaei Comput.r Science Depart.ent Faculty of Computing and Information TechnologyKing Abdulaziz UniversityJeddah21589Saudi Arabia Elect.ical Engineering Depart.ent Faculty of Engineering at ShoubraBenha UniversityCairo11629Egypt

Lip-reading t.chnologies are rapidly progressing following t.e breakt.rough of deep *** plays a vit.l role in it. many applicat.ons,such as:human-machine communicat.on pract.ces or securit. *** t.is paper,we propose t. develop an effect.ve lip-reading recognit.on model for Arabic visual speech recognit.on by implement.ng deep learning *** Arabic visual dat.set. t.at.have been collect.d cont.ins 2400 records of Arabic digit. and 960 records of Arabic phrases from 24 nat.ve *** primary purpose is t. provide a high-performance model in t.rms of enhancing t.e preprocessing ***,we ext.act.keyframes from our ***,we produce a Concat.nat.d Frame Images(CFIs)t.at.represent.t.e ut.erance sequence in one single ***,t.e VGG-19 is employed for visual feat.res ext.act.on in our proposed *** have examined different.keyframes:10,15,and 20 for comparing t.o t.pes of approaches in t.e proposed model:(1)t.e VGG-19 base model and(2)VGG-19 base model wit. bat.h *** result. show t.at.t.e second approach achieves great.r accuracy:94%for digit.recognit.on,97%for phrase recognit.on,and 93%for digit. and phrases recognit.on in t.e t.st.***,our proposed model is superior t. models based on CFIs input.

关键词： Convolut.onal neural net.ork deep learning lip reading t.ansfer learning visual speech recognit.on

Charact.rizat.on and Effect.of Using Mahua Oil Biodiesel as Fuel in Compression Ignit.on Engine

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Journal of t.ermal Science 2009年第4期18卷 382-384页

作者： N.Kapilan t.P.Ashok Babu R.P.Reddy Depart.ent.of Mechanical Engineering NITKSurathkal

t.ere is an increasing int.rest.in India, t. search for suit.ble alt.rnat.ve fuels t.at.are environment.friendly. t.isled t. t.e choice of Mahua Oil (MO) as one of t.e main alt.rnat.ve fuels t. diesel. In t.is invest.gat.on, MahuaOil Biodiesel (MOB) and it. blend wit. diesel were used as fuel in a single cylinder, direct.inject.on and compressionignit.on engine. t.e MOB was prepared from MO by t.ansest.rificat.on using met.anol and pot.ssiumhydroxide. t.e fuel propert.es of MOB are close t. t.e diesel and confirm t. t.e ASt. st.ndards. From t.e enginet.st.analysis, it.was observed t.at.t.e MOB, B5 and B20 blend result. in lower CO, HC and smoke emissionsas compared t. diesel. But.t.e B5 and B20 blends result. in higher efficiency as compared t. MOB. HenceMOB or blends of MOB and diesel (B5 or B20) can be used as a subst.t.t. for diesel in diesel engines used int.ansport.t.on as well as in t.e agricult.re sect.r.

关键词： Alt.rnat.ve fuel mahua oil biodiesel engine performance

Review of micromachining of ceramics by et.hing

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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-HOSSEIN H.B.CHUA School of Engineering and Science Curtin University of Technology (Sarawak Campus) Depart.ent.of Mechat.onics Nelson Mandela Metr opolitan University

In t.e last.t.o decades, t.ere has been an enormous surge in int.rest.in ceramic mat.rials and, as a result. t.ere have been significant.advances in t.eir development.and applicat.ons. t.eir inherent.propert.es, such as capabilit. of operat.ng at.t.mperat.res far above met.ls, high level of hardness and t.ughness, low coefficient.of t.ermal expansion and high t.ermal conduct.vit. rendered ceramics t. be one of t.e leading engineering mat.rials. Many research works have been conduct.d in t.e past.few years on machining of advanced ceramics using different.processing met.ods in order t. obt.in a bet.er surface roughness, higher mat.rial removal rat. and improved t.ol life. Micromachining using chemical et.hing 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. However, only a few research works have been done on micromachining of ceramics using chemical et.hing. Hence, st.dy of chemical machining of advanced ceramics is st.ll needed as t.e process has 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 machining of different.t.pes of advanced ceramics, mat.rial processing met.ods such as wet.et.hing and dry et.hing, and finally t.e prospect. for cont.ol of mat.rial removal rat. and surface qualit. in t.e process of ceramic micromachining.

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

Prospect. for inhibit.ng t.e post.t.anscript.onal regulat.on of gene expression in hepat.t.s B virus

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World Journal of Gast.oent.rology 2014年第25期20卷 7993-8004页

作者： August.ne Chen Nat.anan Panjaworayan t.t.ienprasert.Chris M Brown Cent.e for t.anslat.onal Cancer Research Department of BiochemistryUniversity of Otago710 Cumber-land StDunedin 9054New Zealand Depart.ent.of Bio-chemist.y Faculty of ScienceKasetsart UniversityLadyaow ChatuchakBangkok 10900Thailand Depart.ent.of Biochemist.y and Webst.r Cent.e for Infect.ous diseases University of Otago710 Cum-berland StDunedin 9054New Zealand

t.ere is a cont.nuing need for novel ant.virals t. t.eat.hepat.t.s B virus (HBV) infect.on, as it.remains a major healt. problem worldwide. Ideally new classes of ant.virals would t.rget.mult.ple st.ps in t.e viral lifecycle. In t.is review, we consider t.e st.ps in which HBV RNAs are processed, export.d from t.e nucleus and t.anslat.d. t.ese are oft.n overlooked st.ps in t.e HBV life-cycle. HBV, like ret.oviruses, incorporat.s a number of unusual st.ps in t.ese processes, which use a combinat.on of viral and host.cellular machinery. Some of t.ese unusual st.ps deserve a closer scrut.ny. t.ey may provide alt.rnat.ve t.rget. t. exist.ng ant.viral t.erapies, which are associat.d wit. increasing drug resist.nce. t.e RNA post.t.anscript.onal regulat.ry element.ident.fied 20 years ago promot.s nucleocyt.plasmic export.of all unspliced HBV RNAs. t.ere is evidence t.at.inhibit.on of t.is st.p is part.of t.e ant.viral act.on of int.rferon. Similarly, t.e st.uct.red RNA epsilon element.sit.at.d at.t.e 5’ end of t.e polycist.onic HBV pregenomic RNA also performs key roles during HBV replicat.on. t.e pregenomic RNA, which is t.e t.mplat. for t.anslat.on of bot. t.e viral core and polymerase prot.ins, is also encapsidat.d and used in replicat.on. t.is complex process, regulat.d at.t.e epsilon element. also present. an at.ract.ve ant.viral t.rget. t.ese RNA element. t.at.mediat. and regulat. gene expression are highly conserved and could be t.rget.d using novel st.at.gies employing RNAi, miRNAs or apt.mers. Such approaches t.rget.ng t.ese funct.onally const.ained genomic regions should avoid escape mut.t.ons. t.erefore underst.nding t.ese regulat.ry element., along wit. providing pot.nt.al t.rget., may also facilit.t. t.e development.of ot.er new classes of ant.viral drugs.

关键词： Hepat.t.s B virus t.anslat.onal cont.ol Ant.viral Nuclear export Post.t.anscript.onal cont.ol Nucleocyt.plasmic export