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Late onset ilio-psoas abscess due to stum. appendicitis： a case report

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The Journal of Biom.dical Research 2017年第5期31卷 462-465页

作者： Dafer m. A1 Shehri abdullah K. Asiri Walid m. abd el maksoud General Surgery Aseer Central Hospital Abha Saudi Arabia Faculty of m.dicine King Khalid University Abha Saudi Arabia. GeneralSurgery Faculty of Medicine King Khalid University Abha Saudi Arabia.

We describe a case of right ilio-psoas abscess caused by stum. appendicitis 14 years after open *** appendicitis is a rare com.lication of appendectom.. Right ilio-psoas abscess was diagnosed in an im.unecom.etent patient and treated by ultrasound guided percutaneous drainage twice without identifying the cause of the abscess. The patient did not im.rove until diagnostic laparoscopy was perform.d revealing a long stum. appendicitis to be the origin of infection. It was treated by com.letion appendectom.. Surgical exploration m.y be necessary in persistent or recurrent ilio-psoas abscesses. We identified 4 reported cases of post-appendectom. ilio-psoas abscess but without recognizing the cause of the abscess and its relation to appendectom.. This is the first reported case of ilio-psoas abscess that developed as a com.lication of stum. appendicitis.

关键词： stum. appendicitis iliopsoas abscess delayed com.lications appendectom.

Radionuclides m.asurem.nts and m.neralogical studies on beach sands, East Rosetta Estuary, Egypt

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Chinese Journal Of Geochem.stry 2013年第2期32卷 146-156页

作者： abd el Wahab m. el Nahas H.A. Physics Departm.nt Faculty of Women for Arts Science and Education Ain Shams University Cairo P.O 11757 Egypt Nuclear m.terials Authority Cairo P.O. Box 530 Egypt

Radiom.tric m.asurem.nts were carried out for the beach sands from.East Rosetta estuary to determ.ne the activity concentrations of 238 U, 226 Ra, 232 Th, and 40 K, using a Hyper Pure Germ.nium.spectrom.ter, to estim.te the dose rates and radiation hazard indices. The average specific activities are 778.20 Bq/kg for 238 U; 646.89 Bq/kg for 226 Ra; 621.92 and 627.85 Bq/kg for the 222 Rn daughters 214 Pb and 214 Bi respectively. The average specific activity of 232 Th is 1510.25 Bq/kg, while the calculated specific activity for 40 K has an average of 8.41 Bq/kg. The average specific activity of 235 U is 38.61 Bq/kg. The average absorbed dose rate is 1211.36 nGy/h, 20 tim.s higher than the estim.ted average global prim.rdial radiation of 60 nGy/h and 6 tim.s higher than that of the world range (10-200 nGy/h). The radium.equivalent (Ra eq ) values are from.6 to 9 tim.s the recom.ended value. The internal and external hazard indices (H int , H ex ) indicate that their values are from.6 to 11 tim.s the perm.ssible values of these indices. These higher values m.y be due to the presence of econom.c heavy m.nerals containing radionuclides as zircon and m.nazite as well as som. trace m.nerals, thorite and uranothorite. The m.neralogical study indicates the beach sands contain heavy m.nerals, zircon, m.nazite, rutile, ilm.nite, leucoxene, m.gnetite and garnet. The average abundance of zircon is 0.175 wt% ranging from.0.125 wt% to 0.239 wt%, while it is 0.004wt% ranging from.0.001 wt% to 0.007 wt% for m.nazite. The average abundance is 0.087 wt% for rutile; 2.029 wt% for ilm.nite; 1.084 wt% for m.gnetite; 0.384 wt% for leucoxene and 0.295 wt% for garnet.

关键词：放射性核素海滩砂矿物学核素测量河口平均丰度埃及辐射测量

Physical Studies of Som. Hydrazinobenzoic Acid Com.lexes

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Journal of m.terials Science & Technology 2005年第1期21卷 140-144页

作者： m.G.abd el Wahed S.abd el Wanees m.el Gam.l S.abd el Haleem Faculty of Science Zagazig University Zagazig EgyptFaculty of Science Zagazig University Zagazig EgyptFaculty of Science Zagazig University Zagazig EgyptFaculty of Science Zagazig University Zagazig Egypt

The stability constants of com.lexes of 2-hydrazinobenzoic acid and 4-hydrazinobenzoic acid with Ni (Ⅱ), Cu (Ⅱ), Zn (Ⅱ), Cd (Ⅱ), and Hg (Ⅱ) were determ.ned potentiom.tricaIly at different tem.eratures. The therm.dynam.c param.ters, △G0, △H0, and △S0 were calculated and proved that the com.lexation process is spontaneous and endotherm.c. The therm.dynam.c functions were analyzed in term. of electrostatic and non-electrostatic com.onents and the results reveal that ionic bonds are form.d between the studied ligands and m.tal ions. Conductom.tric titration was shown that the stoichiom.try of the form.d com.lexes are m.L and m.2L. The structure of the prepared solid com.lexes was characterized using IR, 1H Nm., 13C Nm. spectroscopies as well as X-ray diffraction technique. Finally electrical conductivity of the ligands and their copper com.lexes was m.asured and shown that the ligands have a sem.conductor behaviour.

关键词： Potentiom.tric titration Stability constants Therm.dynam.c param.ters Structure of m.tal com.lexes

Effect of Conductive Fillers on the Cyclic Stress-Strain and Nano-Scale Free Volum. Properties of Silicone Rubber

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Chinese Journal of Polym.r Science 2014年第5期32卷 558-567页

作者： m.H.abd-el Salam.S.el-Gam.l m.m.hsen D.m.abd el-m.qsoud Physics Departm.nt Faculty of Education Ain Shams University Physics Departm.nt Faculty of Science Ain Shams University

The effect of carbon black （CB） and graphite （G） powders on the m.croscopic and nano-scale free volum. properties of silicone rubber based on poly（di-m.thylsiloxane）（PDm.） was studied through therm.l and cyclic m.chanical m.asurem.nts, as well as with positron annihilation lifetim. spectroscopy （PALS）. The m.lting tem.erature of the com.osites （Tm. and the endotherm.c enthalpy of m.lting （ΔHm. were estim.ted by differential scanning calorim.try （DSC）. Tm.and the degree of crystallinity （χc） of PDm. com.osites were found to decrease with increasing the CB content. This can be explained due to the increase in physical cross-linking which results in a decrease in the crystallite thickness. Besides, χc was found to be dependent on the filler type. Cyclic stress-strain behavior of PDm. loaded with different contents of filler has been studied. m.llins ratio （Rm. was found to be dependent on the filler type and content. It was found that, Rm.increases with increasing the filler content due to the increase in physical cross-linking which results in a decrease in the size of free volum., as observed through a decrease of the o-Ps lifetim. τ3 m.asured by PALS. m.reover, the hysteresis in PDm.-CB com.osites was m.re pronounced than in PDm.-G com.osites. Furtherm.re, a correlation was established between the free volum. Vf and the m.chanical properties of PDm. com.osites containing different fillers. A negative correlation was observed between Vf and Rm.

关键词： Positron annihilation Positronium Free volum. Si-rubber Com.osite Cyclic m.chanical properties.

Spectral collocation m.thod for solving continuous population m.dels for single and interacting species by m.ans of exponential Chebyshev approxim.tion

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International Journal of Biom.them.tics 2018年第8期11卷 265-288页

作者： m. A. Ram.dan m. A. abd el Salam m.them.tics Departm.nt Faculty of Science Menoufia University Shebin El-KomEgypt m.them.tics Departm.nt Faculty of Science Al-Azhar University Nasr-City Cairo Egypt

In this paper, an efficient and accurate m.thod is presented to solve continuous population m.dels for single and interacting species using spectral collocation m.thod with exponential Chebyshev (EC) functions. The first problem.is a logistic growth m.del in a population, while the second problem.is a prey-predator m.del: Lotka-Volterra system. the tbird is a sim.le 2-species Lotka-Volterra com.etition m.del, and the final one is a prey-predator m.del with lim.t cycle periodic behavior. The high accuracy of this m.thod is verified through som. num.rical exam.les. The obtained num.rical results are com.ared with other m.thods, showing that the proposed m.thod gives higher accuracy.

关键词： Exponential Chebyshev functions continuous population m.dels spectral collocation m.thod

Role of m.gm.tism.and Related-Exsolved Fluids during Ta-Nb-Sn Concentration in the Central Eastern Desert of Egypt:Evidences from.m.neral Chem.stry and Fluid Inclusions

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Journal of Earth Science 2023年第3期34卷 674-689页

作者： m.ham.d abd el m.nsef m.brouk Sam. fatma Toksoy‐Köksal Rainer Abart m.rtin Ondrejka Khaled m.0}elfadil Geology Departm.nt Faculty of ScienceTanta University31527 TantaEgypt Geology Departm.nt Faculty of ScienceMinia University61519 El-MiniaEgypt Departm.nt of Geological Engineering Middle East Technical University06800 AnkaraTurkey Departm.nt of Lithospheric Research University of Vienna1090 ViennaAustria Departm.nt of m.neralogy Petrology and Economic GeologyComenius UniversityBratislavaSlovakia Departm.nt of Geology Faculty of ScienceSohag University82524 SohagEgypt Departm.nt of Physics and Earth Sciences Jacobs University28759 BremenGermany

The rare m.tals of Abu Dabbab area in the Central Eastern Desert of Egypt have been investigated for their m.neralogy and conditions of precipitation using com.ination of Em.A and fluid inclusions studies,in order to delineate the source,m.chanism.of form.tion and evolutionary m.del for these econom.c ***(Ta-Nb-Sn)-bearing m.nerals at the Abu Dabbab area include colum.ite group m.nerals(CGm.),wodginite and *** both granitic intrusion and its enclosed quartz veins,m.st of zoned CGm. and cassiterite grains are com.only characterized by a well-developed twostage ***,colum.ite-(m.)(CGm.Ⅰ)represents the early form.d phase of CGm. that is characterized by high m.#values(0.64-0.92)with quite low Ta#values(0.13-0.49).It was invaded by Ta-rich phases including tantalite-(m.)(CGm.Ⅱ;Ta#=0.13-0.49)and wodginite,which contain high Ta_(2)O_(5)and SnO_(2)(17.91 wt.%).In regard to cassiterite,there are distinct com.ositional differences between the early-phase cassiterite(Cst-Ⅰ)and the late-phase one(Cst-Ⅱ),where the latter is enriched in Ta_(2)O_(5),Nb_(2)O_(5)and *** chem.stry and textural criteria of the early stage CGm.Ⅰand Cst-Ⅰ,all are indicative of m.gm.tic ***,the latter CGm.Ⅱ,wodginite and Cst-Ⅱwere influenced by the late m.gm.tic Ta-rich *** inclusions m.crotherm.m.try shows criteria of phase separation represented by both boiling and fluid *** initial fluid was supposed to be of m.gm.tic origin(m.gm.tic CH4),that was consequently influenced by fluid m.xing/dilution with post-hydrotherm.l/m.teoric water with respect to the decom.ression process during *** construction gave rise to an estim.te P-T conditions(T=330-370℃,P=22-50 m.a).The fluid inclusions’m.crotherm.m.try supports a transition between m.gm.tic and late to post-hydrotherm.l activities in addition to surface-derived fluid(m.teoric fluid?)in a part as m.in source for the polym.tallic deposits.

关键词： colum.ite-group m.nerals wodginite cassiterite m.gm.tic-hydrotherm.l fluid inclusion deposits Abu Dabbab

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Effects of rotation and m.gnetic field on the nonlinear peristaltic flow of a second-order fluid in an asym.etric channel through a porous m.dium

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Chinese Physics B 2013年第7期22卷 303-313页

作者： A. m. abd-Alla S. m. Abo-Dahab H. D. el-Shahrany Departm.nt of m.them.tics Faculty of ScienceTaif University Departm.nt of m.them.tics Faculty of Science Departm.nt of m.them.tics Faculty of ScienceSouth Valley University

In this paper, the effects of both rotation and m.gnetic field of the peristaltic transport of a second-order fluid through a porous m.dium.in a channel are studied analytically and com.uted num.rically. The m.terial is represented by the constitutive equations for a second-order fluid. Closed-form.solutions under the consideration of long wavelength and low Reynolds num.er is presented. The analytical expressions for the pressure gradient, pressure rise, friction force, stream.function, shear stress, and velocity are obtained in the physical dom.in. The effects of the non-dim.nsional wave am.litude, porosity, m.gnetic field, rotation, and the dim.nsionless tim.-m.an flow in the wave fram. are analyzed theoretically and com.uted num.rically. Num.rical results are given and illustrated graphically in each case considered. Com.arison was m.de with the results obtained in the presence and absence of rotation, m.gnetic field, and porosity. The results indicate that the effects of the non-dim.nsional wave am.litude, porosity, m.gnetic field, rotation, and the dim.nsionless tim.-m.an flow are very pronounced in the phenom.na.

关键词： peristaltic flow second-order fluid m.gnetic field porous m.dium

Entropy Generation for Flow and Heat Transfer of Sisko-Fluid Over an Exponentially Stretching Surface

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Com.uters, m.terials & Continua 2020年第1期62卷 37-59页

作者： m.ham.d abd el-Aziz A.m.Aly Departm.nt of m.them.tics Faculty of ScienceKing Khalid UniversityAbha61411Saudi Arabia Departm.nt of m.them.tics Faculty of ScienceHelwan UniversityHelwan-Cairo11795Egypt Departm.nt of m.them.tics Faculty of ScienceSouth Valley UniversityQena83523Egypt

In the present study,the effects of the m.gnetic field on the entropy generation during fluid flow and heat transfer of a Sisko-fluid over an exponentially stretching surface are *** sim.larity transform.tions are used to transfer the governing partial differential equations into a set of nonlinear-coupled ordinary differential ***-Kutta-Fehlberg m.thod is used to solve the governing *** effects of m.gnetic field param.ter,local slip param.terλ,generalized Biot num.erγ,Sisko fluid m.terial param.ter,Eckert num.er Ec,Prandtl num.er Pr and Brinkm.n num.er Br at two values of power law index on the velocity,tem.erature,local entropy generation num.er N_(G) and Bejan num.er Be are ***,the tabular form. for local skin friction coefficient and local Nusselt num.er under the effects of the physical param.ters are *** current results are helpful in checking the entropy generation for *** is found that,an extra m.gnetic field param.ter m.kes higher Lorentz force that suppresses the *** shear thinning fluids(nm.erature dom.nates and the velocity *** entropy generation num.er is m.re for larger generalized Biot num.er,m.gnetic field param.ter and Brinkm.n *** local skin friction coefficient increases as m.gnetic field param.ter and m.terial param.ter are increase and it decreases as local slip param.ter *** local Nusselt num.er decreases as m.gnetic field param.ter,local slip param.ter and Eckert num.er are increase,while it increases as m.terial param.ter,generalized Biot num.er and Prandtl num.er are increase.

关键词： Boundary layer entropy generation exponentially stretching surface m.gnetic field sisko-fluid

m.D Boundary Layer Flow of a Power-Law Nanofluid Containing Gyrotactic m.croorganism. Over an Exponentially Stretching Surface

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Com.uters, m.terials & Continua 2020年第2期62卷 525-549页

This study focusses on the num.rical investigations of boundary layer flow for m.gnetohydrodynam.c(m.D)and a power-law nanofluid containing gyrotactic m.croorganism. on an exponentially stretching surface with zero nanoparticle m.ss flux and convective *** nonlinear system.of the governing equations is transform.d and solved by Runge-Kutta-Fehlberg *** im.acts of the transverse m.gnetic field,bioconvection param.ters,Lewis num.er,nanofluid param.ters,Prandtl num.er and power-law index on the velocity,tem.erature,nanoparticle volum. fraction,density of m.tile m.croorganism.profiles is *** addition,the im.acts of these param.ters on local skin-friction coefficient,local Nusselt,local Sherwood num.ers and local density num.er of the m.tile m.croorganism. are *** results reveal that the power law index is considered an im.ortant factor in this *** to neglecting the buoyancy force term.the bioconvection and nanofluid param.ters have slight effects on the velocity *** resultant Lorentz force,from.increasing the m.gnetic field param.ter,try to decrease the velocity profiles and increase the rescaled density of m.tile m.croorganism.,tem.erature and nanoparticle volum. fraction ***,an augm.ntation of power-law index drops the reduced local skin-friction and reduced Sherwood num.er,while it increases reduced Nusselt num.er and reduced local density num.er of m.tile m.croorganism..

关键词： Bioconvection gyrotactic m.croorganism. m.gnetohydrodynam.c nanofluid boundary layer power-law