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Ph.siological Responses of Pea Plants to Salinity and Gibberellic Acid

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Ph.ton-International Journal of Experimental Botany 2023年第1期92卷 149-164页

作者： h.uneida attia Department of Biology College of ScienceTaif UniversityTaif21944Saudi Arabia Laboratoire ProductivitéVégétale et Contraintes Environnementales Département des Sciences BiologiquesFacultédes Sciences de TunisUniversitéTunis El ManarTunis2092Tunisia

Pea is a seed *** is rich.in cellulose fibre and *** is also a significant source of minerals and *** th.s paper,we set out to better ch.racterize th. ph.siological responses of Pisum sativum *** th. combined effects of NaCl,100 mM and gibberellins(GA3).Our analysis revealed th.t NaCl caused a decrease in growth.resulting in a reduction in root elongation,distribution and density,leaf number and leaf area,and a decrease in dry matter of roots and ***,th. contribution of GA3 in th. salty environment induced an increase in th.se different parameters suggesting an improving effect of th.s h.rmone on growth.of pea in presence of *** also led to a disturbance of th. ph.tosynth.tic ***,level of ch.oroph.ll pigments(a and total)and ph.tosynth.tic activity were decreased compared to th. control ***,th. exogenous supply of GA3 restored th.s decrease in net CO_(2) assimilation,but not in ch.oroph.ll *** analyses were performed on th. effect of salinity/GA3 interaction on osmolytes(soluble sugars and starch..Our results sh.wed an increase in sugars and a decrease in starch.in th. presence of 100 mM *** salt-GA3 combination resulted in compensation of soluble sugar contents but not of starch.contents,suggesting a beneficial effect of GA3 under saline stress *** of th.ee main polyamines putrescine,spermidine,and spermine increased significantly in all organs of salt-treated plants.

关键词： Pisum sativum L. salinity gibberellic acid growth sugars polyamines

Review on Sol-Gel Derived Coatings: Process, Tech.iques and Optical Applications

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Journal of Materials Science & Tech.ology 2002年第3期18卷 211-218页

作者： S.M.attia JueWANG 等 Poh.InstituteofSolidStatePh.sics TongjiUniversityShanghai200092China Ph.s.Dept.FacultyofEducation KaferEl-SheikhEgypt

Sol-gel process is one of th. simplest tech.iques to manufacture th.n films. Th. quality of th. prepared films depends on th. parameters of th. sol-gel process and th. used tech.ique for deposition. A great variety of th. sol-gel derived films h.ve been prepared for different applications. We present a review on th. sol-gel derived coatings. Th. description of th. process is introduced in details. Different sol-gel deposition tech.iques are mentioned. Th. optical applications of th. sol-gel derived coatings are reviewed.

关键词： Sol-gel process Coating Th.n film

Efficient maximum power point tracker based on neural network and sliding-mode control for buck converters

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Clean Energy 2022年第5期6卷 716-725页

作者： h.ssain attia Kh.led h.ssin Department of Electrical and Electronic Engineering American University of Ras Al KhaimahRas Al KhaimahUnited Arab Emirates Department of Mech.nical and Industrial Engineering American University of Ras Al KhaimahRas Al KhaimahUnited Arab Emirates

Th.s paper presents detailed design steps of an effective control system aiming to increase th. solar energy h.rvested via ph.tovoltaic power-generation *** design of an intelligent maximum power point tracker(MPPT)supported by a robust sliding-mode(SM)controller is discussed in th.s *** proposed control sch.me is designed to track th. MPP and provide a smooth.system response by removing th. oversh.ot in th. load current during any variation in th. connected *** a system is suitable for DC-DC buck converter *** study begins with.modelling th. buck converter for a continuous current mode *** reference voltage of th. tracking system is produced by th. proposed neural network(NN)*** proposed intelligent MPPT integrated with.an SM controller is simulated in a MATLAB®/Simulink®*** simulation results are analysed to investigate and confirm th. satisfaction level of th. adopted four-serially connected PV-modules *** system performance is evaluated at a ligh. intensity of 500 W/m^(2) and an ambient temperature of 25°*** only th. proposed NN algorith. guarantees th. MPP tracking response by delivering 100 W at a resistive load of 13Ω,and 200 W at a load of 6.5Ω,respectively,with.99.77%system ***,th.s simultaneously demonstrates a current spike of~0.5 A wh.n th. load is varied from 50%to 100%.Th. integrated SM controller demonstrates a robust and smooth.response,eliminating th. existing current spike.

关键词： ph.tovoltaic panel neural network algorith. MPPT sliding-mode controller buck converter

Formation and Biomimetic Deposition of Bone-like h.droxyapatite on Wollastonite-gypsum Composites

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Journal of Bionic Engineering 2018年第5期15卷 894-906页

作者： Yaser Greish.Nuh. attia Abdel-h.mid Mourad Department of Ch.mistry College of Science United Arab Emirates University AI Ain UAE Department of Ceramics National Research Centre Cairo Egypt Department of Mech.nical Engineering College of Engineering United Arab Emirates University Al Ain UAE Mech.nical Design Department Faculty of Engineering at Mataria Helwan University Cairo Egypt

Bone cements are often used for bone repair and fixation. Th. main objective of formulating a bone cement is to ach.eve structure and properties similarity to bone. In addition, bioactivity of a bone cement provides a major advantage th.t h.lps ach.eving better binding and interaction with.th. surrounding tissues. In th. current study, gypsum was used as a matrix for a composite th.t comprises h.gh.y crys- talline prestine and acid-treated wollastonite （CaSiO3） fibers. Composites made by mixing th.ir powder precursors with.deionized water at room temperature, were investigated for th.ir composition using X-ray diffraction （XRD） and Th.rmogravimetric Analysis （TGA）, for th.ir microstructure using Scanning Electron Microscopy （SEM）, for th.ir compressive strength. and modulus of elasticity, and for setting time measurements. In addition, cement composites were evaluated for th.ir preliminary bioactivity in a protein-free Simulated Body Fluid （SBF） for up to 14 days. Results sh.w th. improvement of mech.nical properties and bioactivity of th. composites using acid-treated wollastonite fibers. Th.s was attributed to th. formation of h.drated silica layer on th. surface of th. acid-treated fibers wh.ch.improved th. binding with.th. gypsum matrix and provided nucleating sites for th. deposition of bone-like apatite sph.rolites from SBF media.

关键词： gypsum wollastonite bone cement biomimetic SBF microstructure

Doppler ultrasonograph. in living donor liver transplantation recipients: Intra- and post-operative vascular complications

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World Journal of Gastroenterology 2016年第27期22卷 6145-6172页

作者： Omar Abdelaziz h.ssein attia Department of Diagnostic and Interventional Radiology Cairo University Hospitals Department of Diagnostic and Interventional Radiology National Cancer Institute Cairo University

Living-donor liver transplantation h.s provided a solution to th. severe lack of cadaver grafts for th. replacement of liver afflicted with.end-stage cirrh.sis, fulminant disease, or inborn errors of metabolism. Vascular complications remain th. most serious complications and a common cause for graft failure after h.patic transplantation. Doppler ultrasound remains th. primary radiological imaging modality for th. diagnosis of such.complications. Th.s article presents a brief review of intra- and post-operative living donor liver transplantation anatomy and a synopsis of th. role of ultrasonograph. and color Doppler in evaluating th. graft vascular h.emodynamics both.during surgery and post-operatively in accurately defining th. early vascular complications. Intra-operative ultrasonograph. of th. liver graft provides th. surgeon with.useful real-time diagnostic and staging information th.t may result in an alteration in th. planned surgical approach.and corrections of surgical complications during th. procedure of vascular anastomoses. Th. relevant intraoperative anatomy and th. spectrum of normal and abnormal findings are described. Ultrasonograph. and color Doppler also provides th. clinicians and surgeons early post-operative potential developmental complications th.t may occur during h.spital stay. Early detection and th.s early problem solving can make th. difference between graft survival and failure.

关键词： Doppler Ultrasound Living donor Liver transplantation Intraoperative Postoperative Vascular Complications

Experimental investigation of ph.tovoltaic systems for performance improvement using water cooling

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Clean Energy 2023年第4期7卷 721-733页

作者： h.ssain attia Kh.led h.ssin Muataz Al h.zza Department of Electrical and Electronic Engineering American University of Ras Al KhaimahRas Al KhaimahUnited Arab Emirates Department of Mech.nical and Industrial Engineering American University of Ras Al KhaimahRas Al KhaimahUnited Arab Emirates Mech.nical Engineering Department University of BenghaziLibya

Th.s research.aims to analyse th. comparative performance of two identical ph.tovoltaic(PV)panels with.load variations and integrating an automated water-cooling process under th. climatic conditions of th. United Arab *** work also presents th. steps of system design,implementation and performance evaluation of th. proposed PV system,and all electrical,control and mech.nical components along with.h.w th.y were integrated with.n a 100-W PV ***/Simulink?was used only to simulate th. beh.viours of th. PV panel under wide ranges of incident sunligh. and ambient *** tests were performed for a day-long operation during a clear summer *** experimental results demonstrate an improvement in th. PV system performance compared with.th. uncooled system by~1.6%in terms of total h.rvested energy using th. proposed water-cooling process with.a frequency of 2 minutes of cooling operation every 30 minutes during day h.urs.

关键词： ph.tovoltaic panel water-cooling power curves MATLAB/Simulink experimental investigation

Recent progress in additive manufacturing of bulk MAX ph.se components:A review

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Journal of Materials Science & Tech.ology 2022年第36期131卷 30-47页

作者： Qiyang Tan Wyman Zh.ang Marco attia Rich.rd Djugum Mingxing Zh.ng Sch.ol of Mech.nical and Mining Engineering The University of QueenslandSt.LuciaQLD 4072Australia Aerospace Division Defence Science and Technology GroupMelbourneVIC 3207Australia

Th. MAX ph.ses are a group of layered ternary,quaternary,or quinary compounds with.ch.racteristics of both.metals and *** recent decades,th. synth.sis of bulk MAX ph.se parts for wider engineering applications h.s gained increasing attention in aerospace,nuclear,and defence *** recent adoption of additive manufacturing(AM)tech.ologies in MAX ph.se fabrication is a step forward in th.s *** work overviews th. recent progress in additive manufacturing(AM)of bulk MAX ph.ses along with.th. ach.eved geometric features,microstructures,and properties after briefing th. conventional powder sintering meth.ds of fabricating MAX ph.se *** ch.llenges associated with.th.se innovative AM-based meth.ds,including,poor AM processability,low MAX ph.se purity,and insufficient geometric accuracy of th. final parts,are also ***,outlooks for th. immediate future in th.s area are discussed based on th. optimization of present fabrication routes and th. potential of oth.r AM tech.ologies.

关键词： MAX ph.se Binder jetting Direct-ink-writing Sh.et lamination Sintering

Purkait’s triangle revisited:role in sex and ancestry estimation

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Forensic Sciences Research 2022年第3期7卷 440-455页

作者： MennattAllah.h.ssan attia Moh.med h.ssan attia Yasmin Tarek Fargh.ly Bassam Ah.ed El-Sayed Abulnoor Sotiris K.Manolis Ruma Purkait Douglas h.Ubelaker Forensic Medicine&Clinical Toxicology Department Faculty of MedicineAlexandria UniversityAlexandriaEgypt Institute for Intelligent Systems Research.and Innovation Deakin UniversityVictoriaAustralia Biomedical Engineering Medical Research InstituteAlexandria UniversityAlexandriaEgypt Diagnostic Radiology Faculty of MedicineAlexandria UniversityAlexandriaEgypt Fixed Prosth.dontics Faculty of DentistryFayoum UniversityFaiyumEgypt Animal&h.man Ph.siology Faculty of BiologyNational&Kapodistrian University of AthensAthensGreece Department of Anth.opology University of AllahabadAllahabadIndia Department of Anth.opology Smithsonian InstitutionWashingtonDCUS

Identification of unknown remains recovered from marine and terrestrial locations is a significant h.manitarian *** investigation proposes a simple meth.d applicable to fragmentary femora for a more refined level of ancestry and/or sex *** th.t end,we re-examined Purkait’s triangle wh.ch.involves th.ee inter-landmark distances between th. traction epiph.ses and th. articular rim of femoral h.ad.A large sample(n=584)from geograph.cally diverse(Egyptian,Indian and Greek)populations was ***,sh.pe(n=3)and trigonometrically derived variables and ratios(n=9 variables)were employed to detect any geograph.cally-clustered morph.logical differences between th.se *** forest modelling(RFM)and linear discriminant function analysis(LDA)were employed to create classification models in instances wh.re sex was known or *** sample was apportioned into training and test sets with.a ratio 70/*** classification accuracies were evaluated by means of k fold cross-validation *** sex estimation,RFM sh.wed similar performance to ***,RFM outperformed LDA in ancestry *** estimation was satisfactory in th. Indian and Egyptian samples albeit th. Greek sample was *** Greek samples presented greater morph.logical overlap with.th. Indian sample due to h.gh.with.n-group *** samples were accurately assigned to th.ir ancestral category wh.n sex was ***,h.gh.r classification accuracies in th. validation sample were obtained in th. sex-specific model of females th.n in *** RFM and th. linear variables,th. overall accuracy reach.d 83%wh.ch.is distributed as 95%,71%and 86%for th. Egyptian,Indian and Greek females,respectively;wh.reas in males,th. overall accuracy is 72%and is distributed as 58%,87%and 50%for th. Egyptian,Indian and Greek males,*** accuracies were also calculated per group in th. test data using th. 12 derived *** th. f

关键词： Forensic sciences forensic anth.opology Purkait’s triangle fragmentary femora ancestry estimation random forest modelling international forensic investigations

h.DRODYNAMIC AND ELASTOh.DRODYNAMIC STUDIES OF A CYLINDRICAL JOURNAL BEARING

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Journal of h.drodynamics 2010年第2期22卷 155-163页

作者： attia h.LI Molka BOUAZIZ Slim MAATAR Moh.med FAKh.AKh.Tah.r h.DDAR Moh.med Mech.nics Modelling and Production Research.Unit (U2MP)National School of Engineers of Sfax(ENIS)BP.11733038sfaxTunisia

In th.s article,th. effect of th. bearing elastic deformation on th. performance ch.racteristics of a cylindrical journal bearing is *** variety of simulation models covers h.drodynamic（h.） and elastoh.drodynamic（Eh.） lubrication *** Reynolds equations governing th. flow in th. clearance space of th. journal bearing are obtained by considering th. effect of mass transfer across th. fluid *** finite element meth.d with.an iteration sch.me was employed to solve both.th. Reynolds equation and th. th.ee-dimensional elasticity equation representing th. displacement field in th. bearing *** converged solutions for th. lubricant flow and elastic deformation vector are *** ch.racteristics of th. journal bearing are computed for h. and Eh. *** simulation results sh.w th.t th. flexibility of bearing liner h.s a significant influence on th. performance of a cylindrical journal ***,th. elastic deformations of th. bearing liner extend th. pressure area in th. bearing and increase th. minimum film ***,dynamic coefficient,load capacity and attitude angle decrease.

关键词： Reynolds equation h.drodynamic(h.) and elastoh.drodynamic(Eh.) lubrication th.ories dynamic coefficients relative eccentricity deformation coefficient