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Susceptibility patterns and virulence genotypes of Helicobacter pylori affecting eradication therapy outcomes among Egyptian patients with gastroduodenal diseases

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World Journal of Gastroenterology 2023年第19期29卷 2950-2960页

作者： ahmed Morad Asaad Gasser El-Azab Eman Abdelsameea Osama Elbahr ahmed Kamal mohamed Abdel-Samiee ahmed Abdelfattah Heba Abdallah Doha Maher ahmed El-Refaie Samar Ebrahim Ghanem Shamshul Ansari Samah Mohammed Awad Department of Microbiology College of MedicineZagazig UniversityZagazig 44519Egypt Department of Hepatology and Gastroenterology National Liver InstituteMenoufia UniversityShebin El-Kom 32511Egypt Department of Clinical Pathology National Liver InstituteMenoufia UniversityShebin El-Kom 32511Egypt Department of Pathology National Liver InstituteMenoufia UniversityShebin El-Kom 32511Egypt Department of Clinical Biochemistry and Molecular Diagnostics National Liver InstituteMenoufia UniversityShebin El-Kom 32511Egypt Department of Health Sciences Higher Colleges of TechnologyAbu Dhabi Women's CollegeAbu Dhabi 25026United Arab Emirates Department of Clinical Microbiology and Immunology National Liver InstituteMenoufia UniversityShebin El-Kom 32511Egypt

BACKGROUND Helicobacter pylori(***)is a significant human pathogen that is responsible for a variety of illnesses,including mucosa-associated lymphoid tissue lymphoma,gastric cancer,peptic ulcers,and *** To investigate the frequency of *** infection and its resistance patterns among Egyptian patients and to determine the influence of *** virulence genetic determinants on the eradication success of 14-d triple therapy *** *** infections were investigated in 72 patients with gastroduodenal complications suggestive of *** *** cagA and vacA genotypes of cultured strains were studied using polymerase chain *** patients underwent 14 d of triple-therapy *** treatment response was examined using histology and a rapid urease test 6 wk after therapy *** The intention-to-treat eradication rate was 59.2%(95%CI:48.2%-70.3%).Rates of *** resistance to clarithromycin,amoxicillin,and metronidazole were 52.8%,81.9%,and 100%,*** eradication of *** was more significantly associated with vacA s1-positive strains[adjusted odds ratio(aOR)=0.507,95%CI:0.175-0.822].A significant association was found between failed eradication rate and *** strains resistant to clarithromycin(aOR=0.204,95%CI:-0.005 to 0.412)and amoxicillin(aOR=0.223,95%CI:0.026-0.537).CONCLUSION This study’s low *** eradication rate following 14-d triple therapy is concerning and *** pan-resistance to metronidazole followed by the high resistance to ciprofloxacin,amoxicillin,and clarithromycin in this research is challenging and of great concern.

关键词： Helicobacter pylori Eradication therapy Virulence Clarithromycin resistance cagA gene vacA gene

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Surgical outcomes of complicated cataract with pediatric trematode granulomatous uveitis

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International Journal of Ophthalmology(English edition) 2023年第3期16卷 354-360页

作者： Mahmoud M.Farouk Amr Mounir Mortada ahmed Abozaid Engy mohamed Mostafa Marwa Mahmoud Abdellah Department of Ophthalmology Sohag Faculty of MedicineSohag UniversitySohag 82524Egypt

AIM:To describe the clinical characteristics and surgical outcomes of complicated cataract with pediatric trematodal granulomatous uveitis(TGU).METHODS:Patients of cataract with TGU in the membranous(inactive) stage underwent cataract surgery with intraocular lens(IOL) *** history and ophthalmic examination were conducted for all cases,whereas Schimphlug imaging and corneal topography were done for some *** follow up was done on the 1st,2nd,and 5th postoperative days after ***,it was done at least at one,three,and six months *** and postoperative complications and the methods of their management were ***:Twelve eyes of 12 male children were included in this study ranging from 8 to *** mean best corrected Snellen visual acuity(BCVA) was significantly improved from 0.09±0.06 preoperatively to 0.37±0.11 at the final visit 6mo postoperatively(P<0.001).Schimphlug imaging and corneal topography showed flattening of the anterior surface of the inferior *** difficulties and complications included the poor dilatability of the drown down pupil,strong posterior synechia between the anterior lens capsule and the iris at the site of the inferior retrocorneal vascularized membrane and *** cases underwent primary hydrophobic IOL ***:Surgery for this type of cataract is relatively safe and *** is associated with some specific difficulties and complications that should be considered during surgery and follow up.

关键词： complicated cataract trematode granulomatous uveitis surgical outcomes

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Magnetoresistive properties of Ni-doped La_(0.7)Sr_(0.3)MnO_3 manganites

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Rare Metals 2016年第7期35卷 551-558页

作者： ahmed mohamed ahmed Abd El-Moez ahmed mohamed Medhat Abdelrady Abdellateef Hassan ahmed Abd El-Ghanny Physics Department Faculty of ScienceSohag University

Lao.7Sr0.3Mnl_xNixO3 （x = 0, 0.025, 0.050 and 0.075） ceramics were prepared by the conventional solid-state reaction method. The partial substitution of Mn by Ni2＋ leads to a decrease in cell volume as well as a structural transition from the rhombohedral to the orthorhombic structure. Ni2＋ doping increases the electrical resistivity, decreases the semiconductor-metal transition temperature （Tms） and relatively enhances the room temperature magnetoresistance （MR）, especially in x = 0.025 and around Tins. With respect to conduction mechanism, the small polaron hopping （SPH） and the variable range hopping （VRH） models were used to ex- amine conduction in the semiconducting region.

关键词： Manganites X-ray diffraction Structure Electrical resistivity Magnetoresistance

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Friction and wear of sand-contaminated lubricated sliding

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Friction 2018年第4期6卷 457-463页

作者： mohamed ahmed RAMADAN Faculty of Engineering at Helwan Helwan University

This paper reports a test investigation of friction and wear responses from sand contaminated lubricated sliding. The influence of sand contaminants on wear and friction is characterized. Analyses are completed utilizing segments of piston ring sliding against the cylinder liner. Paraffin oil, with and without sand contaminants, is utilized. The effects of the concentration and particle size of sand are examined. Based on the observations in the present work, we found that friction and wear increase with sand concentration in the lube. Solid proposals ought to be considered, in order to enlighten the general population on the importance of changing a car engine's oil filter regularly.

关键词：滑动摩擦汽车发动机滤油器

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Effect of reperfusion strategy on QT dispersion in patients with acute myocardial infarction:Impact on in-hospital arrhythmia

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World Journal of Cardiology 2023年第3期15卷 106-115页

作者： mohamed Aboel-Kassem F Abdelmegid mohamed M Bakr Hamdy Shams-Eddin Amr A Youssef ahmed Abdel-Galeel Department of Cardiovascular Medicine Assiut University Heart HospitalAssiut UniversityAssiut 71526Egypt Department of Cardiology Sohag Heart and GIT CenterSohag 85264Egypt Department of Cardiology Assiut Police HospitalAssiut 71526Egypt Department of Cardiology Qena General HospitalQena 92354Egypt

BACKGROUND Myocardial ischemia and ST-elevation myocardial infarction(STEMI)increase QT dispersion(QTD)and corrected QT dispersion(QTcD),and are also associated with ventricular *** To evaluate the effects of reperfusion strategy[primary percutaneous coronary intervention(PPCI)or fibrinolytic therapy]on QTD and QTcD in STEMI patients and assess the impact of the chosen strategy on the occurrence of in-hospital *** This prospective,observational,multicenter study included 240 patients admitted with STEMI who were treated with either PPCI(group I)or fibrinolytic therapy(group II).QTD and QTcD were measured on admission and 24 hr after reperfusion,and patients were observed to detect in-hospital *** There were significant reductions in QTD and QTcD from admission to 24 hr in both group I and group II *** and QTcD were found to be shorter in group I patients at 24 hr than those in group II(53±19 msec vs 60±18 msec,P=0.005 and 60±21 msec vs 69+22 msec,P=0.003,respectively).The occurrence of in-hospital arrhythmia was significantly more frequent in group II than in group I(25 patients,20.8%vs 8 patients,6.7%,P=0.001).Furthermore,QTD and QTcD were higher in patients with in-hospital arrhythmia than those without(P=0.001 and P=0.02,respectively).CONCLUSION In STEMI patients,PPCI and fibrinolytic therapy effectively reduced QTD and QTcD,with a higher observed reduction using *** was associated with a lower incidence of in-hospital arrhythmia than fibrinolytic *** addition,QTD and QTcD were shorter in patients not experiencing in-hospital arrhythmia than those with arrhythmia.

关键词： Arrhythmia QT dispersion ST-segment elevation myocardial infarction Reperfusion Primary percutaneous coronary intervention Fibrinolytic therapy

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Improved Chameleon Swarm Optimization-Based Load Scheduling for IoT-Enabled Cloud Environment

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Computer Systems Science & Engineering 2023年第8期46卷 1371-1383页

作者： Manar ahmed Hamza Shaha Al-Otaibi Sami Althahabi Jaber S.Alzahrani Abdullah mohamed Abdelwahed Motwakel Abu Sarwar Zamani mohamed I.Eldesouki Department of Computer and Self Development Preparatory Year DeanshipPrince Sattam Bin Abdulaziz UniversityAl-Kharj16278Saudi Arabia Department of Information Systems College of Computer and Information SciencesPrincess Nourah Bint Abdulrahman UniversityRiyadh11671Saudi Arabia Department of Computer Science College of Science&Art atMahayilKing Khalid UniversityMuhayel Aseer62529Saudi Arabia Department of Industrial Engineering College of Engineering at AlqunfudahUmm Al-Qura UniversityMecaa24382Saudi Arabia Research Centre Future University in EgyptNew Cairo11845Egypt Department of Information System College of Computer Engineering and SciencesPrince Sattam Bin Abdulaziz UniversityAlKharjSaudi Arabia

Internet of things(IoT)and cloud computing(CC)becomes widespread in different application domains such as business,e-commerce,healthcare,*** recent developments of IoT technology have led to an increase in large amounts of data from various *** IoT enabled cloud environment,load scheduling remains a challenging process which is applied for ensuring network stability with maximum resource *** load scheduling problem was regarded as an optimization problem that is solved by *** this view,this study develops a new Circle Chaotic Chameleon Swarm Optimization based Load Scheduling(C3SOA-LS)technique for IoT enabled cloud *** proposed C3SOA-LS technique intends to effectually schedule the tasks and balance the load uniformly in such a way that maximum resource utilization can be ***,the presented C3SOA-LS model involves the design of circle chaotic mapping(CCM)with the traditional chameleon swarm optimization(CSO)algorithm for improving the exploration process,shows the novelty of the *** proposed C3SOA-LS model computes an objective with the minimization of energy consumption and *** experimental outcome implied that the C3SOA-LS model has showcased improved performance and uniformly balances the load over other approaches.

关键词： Cloud environment load scheduling energy consumption internet of things metaheuristics

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Anti-wear properties evaluation of frictional sliding interfaces in automobile engines lubricated by copper/graphene nanolubricants

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Friction 2020年第5期8卷 905-916页

作者： mohamed Kamal ahmed ALI Xianjun HOU mohamed AAABDELKAREEM Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of TechnologyWuhan 430070China Automotive and Tractors Engineering Department Faculty of EngineeringMinia UniversityEl-Minia 61111Egypt Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan 430070China

Owing to the significance of improving fuel economy, reducing emissions, and extending the durability of engine components, this study focused on the tribological performance of nano-additives. In this study, copper (Cu) and graphene (Gr) nanomaterials were dispersed in a fully formulated engine oil (5W-30) with different concentrations. The tribological trials were investigated under various speeds and loads, utilizing a reciprocating tribometer to mimic the ring/liner interfaces in the engine. The frictional surface morphologies were com-prehensively analyzed using electron probe X-ray microanalysis (EPMA), field emission scanning electron microscopy (FESEM), energy dispersive spectrometer (EDS), and three dimensional (3D) surface profilometry to explore the mechanisms responsible for improving the tribological performance of the frictional sliding parts in the engine. The tribological test results illustrated that lubrication by nano-additives reduced the wear rate (WR) and friction coefficient (COF) by 25%–30% and 26.5%–32.6%, respectively, as compared with 5W-30. The results showed that this is a promising approach for increasing the durability and lifespan of frictional sliding components and fuel economy in automobile engines.

关键词： engine tribology nanomaterial nanolubricant friction wear tribofilm

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Modified Dragonfly Optimization with Machine Learning Based Arabic Text Recognition

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Computers, Materials & Continua 2023年第8期76卷 1537-1554页

作者： Badriyya BAl-onazi Najm Alotaibi Jaber SAlzahrani Hussain Alshahrani mohamed ahmed Elfaki Radwa Marzouk Mahmoud Othman Abdelwahed Motwakel Department of Language Preparation Arabic Language Teaching InstitutePrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia Prince Saud AlFaisal Institute for Diplomatic Studies RiyadhSaudi Arabia Department of Industrial Engineering College of Engineering at AlqunfudahUmm Al-Qura UniversityMakkahSaudi Arabia Department of Computer Science College of Computing and Information TechnologyShaqra UniversityShaqraSaudi Arabia Department of Information Systems College of Computer and Information SciencesPrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia Department of Computer Science Faculty of Computers and Information TechnologyFuture University in EgyptNew Cairo11835Egypt Department of Computer and Self Development Preparatory Year DeanshipPrince Sattam bin Abdulaziz UniversityAlKharjSaudi Arabia

Text classification or categorization is the procedure of automatically tagging a textual document with most related labels or *** the number of labels is limited to one,the task becomes single-label text *** Arabic texts include unstructured information also like English texts,and that is understandable for machine learning(ML)techniques,the text is changed and demonstrated by numerical *** recent times,the dominant method for natural language processing(NLP)tasks is recurrent neural network(RNN),in general,long short termmemory(LSTM)and convolutional neural network(CNN).Deep learning(DL)models are currently presented for deriving a massive amount of text deep features to an optimum performance from distinct domains such as text detection,medical image analysis,and so *** paper introduces aModified Dragonfly Optimization with Extreme Learning Machine for Text Representation and Recognition(MDFO-EMTRR)model *** presentedMDFO-EMTRR technique mainly concentrates on the recognition and classification of the Arabic *** achieve this,theMDFO-EMTRRtechnique encompasses data pre-processing to transform the input data into compatible ***,the ELM model is utilized for the representation and recognition of the Arabic *** last,the MDFO algorithm was exploited for optimal tuning of the parameters related to the ELM method and thereby accomplish enhanced classifier *** experimental result analysis of the MDFO-EMTRR system was performed on benchmark datasets and attained maximum accuracy of 99.74%.

关键词： Arabic corpus dragonfly algorithm machine learning text mining extreme learning machine

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Mid-term results of sub-trochanteric valgus osteotomy for symptomatic late stages Legg-Calvé-Perthes disease

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World Journal of Orthopedics 2023年第5期14卷 328-339页

作者： Khaled M Emara Ramy ahmed Diab ahmed K Emara mohamed Eissa Mostafa Gemeah Shady Abdelghaffar Mahmoud Department of Orthopedic Surgery Ain Shams UniversityCairo 11591Egypt Department of Orthopedic Surgery Cleveland Clinic FoundationClevelandOH 9500United States Health Care Innovation Program Arizona State UniversityTempeAZ 85287United States

BACKGROUND The treatment of late stages of Legg-Calvé-Perthes disease(LCPD)is *** the concept of femoral head containment is a well-established technique of treatment,its use remains debatable in the late stages of the disease,as it does not improve symptoms in terms of limb length discrepancy and *** To assess the results of subtrochanteric valgus osteotomy in symptomatic patients with late-stage Perthes *** From 2000 to 2007,36 symptomatic patients with late stage of Perthes disease were surgically treated with subtrochanteric valgus osteotomy and followed-up for 8 to 11 years using the IOWA score and range of motion(ROM)*** Mose classification was also assessed at the last follow-up to reflect possible *** patients were 8 years old or older at the time of surgery,in the post-fragmentation stage,and complaining of pain,limited ROM,Trendelenburg gait,and/or abductor *** The preoperative IOWA score(average:53.3)markedly improved at the 1-year post follow-up period(average:85.41)and then slightly improved at the last follow-up(average:89.4)(P value<0.05).ROM improved,with internal rotation increased on average by 22°(from 10°preoperatively to 32°postoperatively)and abduction increased on average by 15.9°(from 25°preoperatively to 41°postoperatively).The mean Mose deviation of femoral heads was 4.1 mm at the end of the follow-up *** tests used were the paired t-test and Pearson correlation test,where the level of significance was a P value less than *** Subtrochanteric valgus osteotomy can be a good option for symptomatic relief in patients with late-stage of LCPD.

关键词： Legg-Calvé-Perthes disease Femoral head avascular necrosis Valgus osteotomy Deformity correction Post fragmentation stage Late stage Perthes

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A New Approach for Manufacturing a High Porosity Ti-6Al-4V Scaffolds for Biomedical Applications

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Journal of Materials Science & Technology 2008年第6期24卷 931-935页

作者： Montasser DEWIDAR H.fouad mohamed Jae-Kyoo LIM Department of Mechanical Design and Materials High Institute of EnergySouth Valley University AswanEgypt Biomedical Engineering Department Faculty of EngineeringHelwan UniversityEgypt Automobile Hi-Technology Research Institute Faculty of Mechanical & Aerospace System Eng.Chonbuk National UniversityDuckjin 1-664-14JeonjuJB 561-756South Korea

Titanium and its alloys are currently considered as one of the most important metallic materials used in the biomedical applications, due to their excellent mechanical properties and superior biocompatibility. In the present study, a new effective method for fabricating high porosity titanium alloy scaffolds was developed. Porous Ti-6Al-4V scaffolds are successfully fabricated with porosities ranging from 30% to 70% using spaceholder and powder sintering technique. Based on its acceptable properties, spherical carbamide particles with different diameters （0.56, 0.8, and 1mm） were used as the space-holder material in the present investigation. The Ti-6Al-4V scaffolds porosity is characterized by using scanning electron microscopy. The results show that the scaffolds spherical-shaped pores are depending on the shape, size and distribution of the space-holder particles. This investigation shows that the present new manufacturing technique is promising to fabricate a controlled high porosity and high purity Ti-6Al-4V scaffolds for hard tissue replacement.

关键词： Ti-6Al-4V Porous material Powder metallurgy Space-holder

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