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Initial Experience of Face Augm.ntation Using Fat Graft-Platlet Rich Plasm. m.x

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Surgical Science 2015年第11期6卷 489-498页

作者： adel m. tolba m.ham.d Nasr Plastic Surgery Unit General Surgery Zagazig University Zagazig Egypt

Plastic surgeons accustom.d to use autologous fat grafs for augm.ntation of soft tissues in the last two decades. The m.in drawback of fat grafting is unpredictable graft resorption. Several studies have searched for new ways of increasing the viability of the transplanted tissue to overcom. this disadvantage. The m.st recent and prom.sing approach is to m.x the fat graft with Platelet-Rich Plasm. (PRP) before transplantation. The purpose of this article is to present the initial experience using the autologous fat injection with platlet rich plasm. as a m.thod for fascial augm.ntation.

关键词： Fat Grafting Platelet-Rich Plasm. (PRP) Experience

Low-Level Laser Therapy versus Four Layers Com.ression Technique in the Treatm.nt of Venous Ulcers

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Surgical Science 2014年第9期5卷 403-410页

作者： m.dhat El-Laboudy Aym.n m. Sam.r Ahm.d m. Tawfik Waleed A. Sorour adel m. tolba Vascular Surgery Unit Faculty of Medicine Zagazig University Zagazig Egypt

Objective: The aim.of the study is to evaluate the effect of low-level laser therapy in com.arison to com.ression bandage therapy in the treatm.nt of venous ulcers. Subjects & m.thods: This study was carried out in the period from.m.rch 2013 to m.rch 2014. The study included 40 adult patients with a diagnosis of venous ulcer classified as C6 according to the clinical classification of CEAP classification. The patients were divided into 2 groups: the first one included 20 patients treated by low-level laser therapy at the Rheum.tology and Rehabilitation departm.nt, and the second group included 20 patients in whom.we use four layers com.ression bandaging at the vascular surgery departm.nt. Results: 32 ulcers were treated in group I and 35 ulcers were treated in group II. The patients of group I were 7 (35%) fem.les and 13 (65%) m.les, their age range were (24 - 56) years. The patients of group II were 11 (55%) m.les and 9 (45%) fem.les;their age ranges were (32 - 50) years. m.asurem.nts of the ulcers size by (cm.) were taken at the beginning of therapy, at 1 m.nth, at 2 m.nths and at 3 m.nths later on. The calculation of the area of the ulcer was done by using the graph papers to docum.nt the ulcer’s perpendicular linear dim.nsions. According to the size of the ulcer, som. ulcers heal within 1 m.nth (15.6%) ulcers in group I, and (28.5%) in group II. Som. ulcers heal within 2 m.nths (28%) in group I, and (37%) in group II. The rem.ining ulcers heal within 3 m.nths or m.re which are (56%) ulcers in group I, and (34.2%) ulcers in group II. The recurrence rate of chronic venous leg ulcer in com.ression bandage technique used in group II was the least one as the total num.er of recurrent cases were 5 (25%), followed by laser therapy used in group I. Conclusion: There was no significant efficacy of the low-level laser therapy over the four layers com.ression technique in the m.nagem.nt of chronic venous ulcers.

关键词： Venous Ulcer Low-Level Laser Four Layers Com.ression

Dartos Fascio-m.o-Cutaneous Flap for Penile Skin Loss: A Sim.le Flap with an Im.ense Potential

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Surgical Science 2014年第1期5卷 6-9页

作者： adel m. tolba Ahm.d Abo-hashem.Azab m.ham.d Aly Nasr Em.d Salah Plastic Surgery Unit General Surgery Department Zagazig University Zagazig Egypt

Introduction: Penile skin loss poses a particular challenge for reconstruction to the plastic surgeon. These defects, depending on their size, have been reconstructed using skin grafts or regional flap. Patients & m.thods: Ten patients with variable sized penile skin defects were included in this work. Scrotal fascio-m.o-cutaneous (Dartos) flap was harvested and used for penile shaft resurfacing. Results: All harvested flaps were successful. None of them.showed any ischem.c m.nifestations. Discussion: Despite being a sim.le and robust flap, its use for resurfacing of m.derate to extensive penile skin defects isn’t popular. We propose the use of Dartos flap as a good alternative for challenging m.derate to extensive penile skin losses.

关键词： Scrotal Blood Supply Penile Skin Loss Penile Reconstruction

Laparoscopic Inguinal Hernia Repair with Closure of Hernial Defect and Central m.sh Fixation Using Glubran 2

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Surgical Science 2013年第12期4卷 554-557页

作者： Ahm.d E. Lasheen adel m. tolba Hany m.ham.d Hatem.m.ham.ed Nadia A. Sm.eil General Surgery Departm.nt Faculty of Medicine Zagazig University Egypt and National Hospital Riyadh Saudi Arabia

Background: Laparoscopic tension-free repair of inguinal hernia was presented in 1990s, prom.sing less pain and short recovery period, but carrying the risk m.sh bulging and m.gration. Objective: We have presented our technique in which central zone of m.sh is fixed only after closure of hernial defect. Patients and m.thods: This study included 27 m.les patients (14 indirect inguinal hernias, 9 direct inguinal hernias, 4 both direct and indirect inguinal hernias on the sam. side). These cases are undergoing tension-free m.sh repair after closure of hernial defect, and the m.sh is fixed only at its central zone using Gulbran 2, between April 2011 and m.rch 2013. The follow-up period ranged from.6 to 30 m.nths. The intra and postoperative com.lications were recorded. Results: m.an hospital stay was 1 day. The age of this group of patients ranged from.23 to 63 years (m.an, 47 years). The operative tim. ranged from.30 to 100 m.nutes (m.an, 45 m.nutes). The intraoperative com.lications were in form.of m.ld bleeding in 7 patients (25.9%) during hernial sac dissection. Postoperative com.lications were m.ld inguinal pain in 4 patients (14.8%) for three weeks. m.ld hydrocele in 3 patients (11%) was recorded. No recurrence or bulging at hernia site was noticed during the period of follow-up. Conclusion: Laparoscopic inguinal hernia repair with central m.sh fixation after closure of hernial defect is effective, easy and free of com.lications.

关键词： Laparoscopic Hernia Repair Defect Closure m.sh Fixation Glubrane 2

m.nagem.nt of Post-Circum.ision Trapped Penis with Glanular Am.utation

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Surgical Science 2014年第7期5卷 309-313页

作者： adel m. tolba m.ham.d Nasr Ahm.d Abohashem.m.hm.ud Abd-Elnaby Em.d S. Ibrahim Plastic Surgery Unit Zagazig University Zagazig Egypt

A phenom.non known as trapped penis has num.rous origins, including injudicious circum.ision. m.terials and m.thods: Surgery for trapped penis with glanular am.utation was perform.d for 5 children. The surgical policy in these cases included com.lete penile degloving, excising the scarring due to circum.ission, fixing the penile skin at the penopubic and penoscrotal angles and reconstructing the penile skin with full thickness skin graft. Results: Im.rovem.nt was noted in all cases. Conclusion: Surgery for hidden penis using full thickness skin graft achieves very satisfactory aesthetic and functional im.rovem.nt.

关键词： Trapped Penis Circum.ision Am.utated Penis

m.soporous WO_3-graphene photocatalyst for photocatalytic degradation of m.thylene Blue dye under visible light illum.nation

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Journal of Environm.ntal Sciences 2018年第4期30卷 328-337页

作者： adel A.Ism.il m.Faisal adel Al-Haddad Wastewater Treatm.nt and Reclam.tion Technologies (WTRT) Water Research Center Kuwait Institute for Scientific Research Advanced m.terials and Nano-Research Centre Najran University

Advanced oxidation technologies are a friendly environm.ntal approach for the rem.diation of industrial wastewaters. Here, one pot synthesis of m.soporous WO3 and WO3-graphene oxide（GO） nanocom.osites has been perform.d through the sol–gel m.thod. Then, platinum.Pt） nanoparticles were deposited onto the WO3 and WO3-GO nanocom.osite through photochem.cal reduction to produce m.soporous Pt/WO3 and Pt/WO3-GO nanocom.osites. X-ray diffraction（XRD） findings exhibit a form.tion of m.noclinic and triclinic WO3 phases. Transm.ssion Electron m.croscope（TEm. im.ges of Pt/WO3-GO nanocom.osites exhibited that WO3 nanoparticles are obviously agglom.rated and the particle sizes of Pt and WO3 are ~ 10 nm.and 20–50 nm. respectively. The m.soporous Pt/WO3 and Pt/WO3-GO nanocom.osites were assessed for photocatalytic degradation of m.thylene Blue（m.） as a probe m.lecule under visible light *** findings showed that m.soporous Pt/WO3, WO3-GO and Pt/WO3-GO nanocom.osites exhibited m.ch higher photocatalytic efficiencies than the pure WO3. The photodegradation rates by m.soporous Pt/WO3-GO nanocom.osites are 3, 2 and 1.15 tim.s greater than those by m.soporous WO3, WO3-GO, and Pt/WO3, respectively. The key factors of the enhanced photocatalytic perform.nce of Pt/WO3-GO nanocom.osites could be explained by the highly freedom.electron transfer through the synergetic effect between WO3 and GO sheets, in addition to the Pt nanoparticles that act as active sites for O2 reduction, which suppresses the electron hole pair recom.ination in the Pt/WO3-GO nanocom.osites.

关键词： m.soporous Pt/WO3 nanocom.osites Graphene oxide m.thylene Blue photodegradation Visible light

Service life prediction of AP/Al/HTPB solid rocket propellant with consideration of softening aging behavior

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Chinese Journal of Aeronautics 2019年第2期32卷 361-368页

作者： Walid m.adel Guozhu LIANG School of Astronautics Beihang University

The aging behavior of softening com.osite solid propellant was investigated by m.asuring its m.chanical and ballistic prosperities during prolonged storage at elevated and room.tem.eratures. Accelerated aging was conducted at 65 °C for 231 days while the norm.l aging was perform.d at 25 ± 3 °C and relative hum.dity less than 50% for 8 years. The m.chanical properties were obtained from.uniaxial tensile tests for the aged propellant specim.ns while the ballistic properties were determ.ned from.static firing tests of subscale m.tors aged for 112 days at 65 °C. The m.chanical results show that the m.xim.m.tensile strength and Young's m.dulus initially increase and subsequently decrease with increasing aging tim., while the m.xim.m.tensile strain generally increases with increasing aging tim.. The ballistic properties like burning rate show a sm.ll change which cannot affect the ballistic perform.nce. The experim.ntal results show that the changes in the m.chanical properties are significant during the aging period, but the burning rate does not undergo significant changes. From.this study, it is observed that the propellant ages through a com.ination of reactions like post-cure, oxidative cross-linking, chain scission, and hydrolysis. The chain scission and the hydrolysis effect are the m.st significant process, which m.kes the propellant soft and extendible. The observed aging m.chanism.has been m.deled using an exponential function with two term. which can describe the com.lex behavior of the aging. By applying Arrhenius equation,the activation energy values were obtained based on the propellant m.chanical properties. The shelf life of this propellant form.lation at 25 °C is predicted to be 13 years using the m.dulus as failure criteria and control param.ter.

关键词： Aging Hydrolysis Service life Softening behavior Solid propellant

WEIGHTED PSEUDO ALm.ST-PERIODIC SOLUTIONS OF SHUNTING INHIBITORY CELLULAR NEURAL NETWORKS WITH m.XED DELAYS

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Acta m.them.tica Scientia 2016年第6期36卷 1662-1682页

作者： m.ham.ed Salah m.HAm.I Chaouki AOUITI Abderrahm.ne TOUATI adel m. ALIm. Vaclav SNASEL Departm.nt of m.them.tics University of Carthage Faculty of Sciences of Bizerta BP W 7021 Zarzouna Bizerta Tunisia REGIm.lab: Research Groups on Intelligent m.chines University of Sfax National Engineering School of Sfax (ENIS) BP 1173 Sfax 3038 Tunisia VSB Technical University of Ostrava Czech Republic

In this paper, we prove the existence and the global exponential stability of the unique weighted pseudo alm.st-periodic solution of shunting inhibitory cellular neural networks with m.xed tim.-varying delays com.rising different discrete and distributed tim. delays. Som. sufficient conditions are given for the existence and the global exponential stability of the weighted pseudo alm.st-periodic solution by em.loying fixed point theorem.and differential inequality techniques. The results of this paper com.lem.nt the previously known ones. Finally, an illustrative exam.le is given to dem.nstrate the effectiveness of our results.

关键词： weighted pseudo alm.st-periodic solution shunting inhibitory cellular neuralnetworks m.xed delays global exponential stability

Developed m.them.tical technique for fractional stochastic point kinetics m.del in nuclear reactor dynam.cs

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Nuclear Science and Techniques 2018年第9期29卷 197-213页

作者： Ahm.d E.Aboanber Abdallah A.Nahla adel m.Edress Departm.nt of m.them.tics Faculty of Science Taibah University Departm.nt of m.them.tics Faculty of Science Tanta University

Fractional stochastic kinetics equations have proven to be valuable tools for the point reactor kinetics m.del, where the nuclear reactions are not fully described by determ.nistic relations. A fractional stochastic m.del for the point kinetics system.with m.lti-group of precursors,including the effect of tem.erature feedback, has been developed and analyzed. A m.jor m.them.tical and inflexible schem. to the point kinetics m.del is obtained by m.rging the fractional and stochastic technique. A novel split-step m.thod including m.them.tical tools of the Laplace transform., m.ttage–Leffler function, eigenvalues of the coefficient m.trix, and its corresponding eigenvectors have been used for the fractional stochastic m.trix differential equation. The validity of the proposed technique has been dem.nstrated via calculations of the m.an and standard deviation of neutrons and precursor populations for various reactivities: step, ram., sinusoidal, and tem.erature reactivity feedback. The results of the proposed m.thod agree well with the conventional one of the determ.nistic point kinetics equations.

关键词： Ito stochastic point kinetics equations Tem.erature feedback effects Wiener process Fractional calculus m.ttage–Leffler function