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Static and dynamic stability responses of multilayer functionally graded carbon nanotubes reinforced composite nanoplates via quasi 3D nonlocal strain gradient theory

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Defence Technology（防务技术） 2022年第10期18卷 1778-1809页

作者： ahmed amine daikh Mohamed Sid ahmed Houari Mohamed Ouejdi Belarbi Salwa A.Mohamed Mohamed A.Eltaher Laboratoire D'Etude des Structures et de Mecanique des Materiaux Departement de Genie CivilFacultedes Sciences et de La TechnologieUniversite Mustapha Stambouli B.P.305R.P.29000MascaraAlgeria Laboratoire de Genie Energetique et Materiaux LGEMUniversite de BiskraB.P.145R.P07000BiskraAlgeria Department of Engineering Mathematics Zagazig UniversityP.O.Box 44519ZagazigEgypt Faculty of Engineering Mechanical Engineering DepartmentKing Abdulaziz UniversityP.O.Box 80204JeddahSaudi Arabia Faculty of Engineering Mechanical Design and Production DepartmentZagazig UniversityP.O.Box 44519ZagazigEgypt

This manuscript presents the comprehensive study of thickness stretching effects on the free vibration,static stability and bending of multilayer functionally graded(FG)carbon nanotubes reinforced composite(CNTRC)*** nanoscale and microstructure influences are considered through a modified nonlocal strain gradient continuum *** on power-law functions,four different patterns of CNTs distribution are considered in this analysis,a uniform distribution UD,FG-V CNTRC,FG-X CNTRC,and FG-O CNTRC.A 3D kinematic shear deformation theory is proposed to include the stretching influence,which is neglected in classical ***'s principle is applied to derive the governing equations of motion and associated boundary *** solutions are developed based on Galerkin method to solve the governing equilibrium equations based on the generalized higher-order shear deformation theory and the nonlocal strain gradient theory and get the static bending,buckling loads,and natural frequencies of *** with previous works is presented.A detailed parametric analysis is carried out to highlight the impact of thickness stretching,length scale parameter(nonlocal),material scale parameter(gradient),CNTs distribution pattern,geometry of the plate,various boundary conditions and the total number of layers on the stresses,deformation,critical buckling loads and vibration *** new results are also reported in the current study,which will serve as a benchmark for future research.

关键词： 3D shear deformation theory Free vibration Buckling Bending Galerkin method Functionally graded nanotube Nonlocal strain gradient theory

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Interleukin 7 regulates switch transcription in developing B cells

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Cellular & Molecular Immunology 2021年第3期18卷 776-778页

作者： Audrey Dauba Fatima-Zohra Braikia Chloe Oudinet ahmed amine Kham lichi Mnstitut de Pharmacologie et de Biologie Structurale IPBSUniversite de ToulouseCNRSUniversity Paul Sabatier31077 ToulouseFrance

Class switch recombination(CSR)enables activated mature B cells to change immunoglobulin(Ig)isotype expression from IgM to IgG,IgE,or *** process requires activation-induced cytidine deaminase(AID)expression and transcription of the target sequences at the Ig heavy chain(IgH)constant locus,which is composed of multiple constant(C_(H))genes,each specifying an Ig isotype.

关键词： Interleukin enable IgH

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Fungal diversity in adult date palm(Phoenix dactylifera L.) revealed by culture-dependent and culture-independent approaches

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2013年第12期14卷 1084-1099页

作者： Ines BEN CHOBBA amine ELLEUCH Imen AYADI Lamia KHANNOUS ahmed NAMSI Frederique CERQUEIRA Noureddine DRIRA Néji GHARSALLAH Tatiana VALLAEYS Laboratoire de Biotechnologies Végétales Appliquées à l'Amélioration des Cultures LBVAAC Faculté des Sciences de SfaxB.P. 1171 3000 Sfax Tunisia UMR 5119 Université de Montpellier 2 Sciences et Techniques pl E. BataillonCC093 34095 Montpellier France Laboratoire de Microorganismes et de Biomolécules Centre de Biotechnologie de Sfax Université de Sfax Route Sidi MansourB.P. 1177 3018 Sfax Tunisia Laboratoire de Phytopathologie Oasienne Centre Régional de Recherches en Agriculture Oasienne à DegacheDegache 2260 Tunisia Plateforme Séquen age-Génotypage SFR "Montpellier Environnement Biodiversité" ISEM Université de Montpellier 234095 Montpellier France

Endophytic flora plays a vital role in the colonization and survival of host plants, especially in harsh environments, such as arid regions. This flora may, however, contain pathogenic species responsible for various troublesome host diseases. The present study is aimed at investigating the diversity of both cultivable and non-cultivable endophytic fungal floras in the internal tissues(roots and leaves) of Tunisian date palm trees(Phoenix dactylifera). Accordingly, 13 isolates from both root and leaf samples, exhibiting distinct colony morphology, were selected from potato dextrose agar(PDA) medium and identified by a sequence match search wherein their 18S–28S internal transcribed spacer(ITS) sequences were compared to those available in public databases. These findings revealed that the cultivable root and leaf isolates fell into two groups, namely Nectriaceae and Pleosporaceae. Additionally, total DNA from palm roots and leaves was further extracted and ITS fragments were amplified. Restriction fragment length polymorphism(RFLP) analysis of the ITS from 200 fungal clones(leaves: 100; roots: 100) using HaeIII restriction enzyme revealed 13 distinct patterns that were further sequenced and led to the identification of Alternaria, Cladosporium, Davidiella(Cladosporium teleomorph), Pythium, Curvularia, and uncharacterized fungal endophytes. Both approaches confirmed that while the roots were predominantly colonized by Fusaria(members of the Nectriaceae family), the leaves were essentially colonized by Alternaria(members of the Pleosporaceae family). Overall, the findings of the present study constitute, to the authors' knowledge, the first extensive report on the diversity of endophytic fungal flora associated with date palm trees(P. dactylifera).

关键词： Date palm tree(Phoenix dactylifera) Endophytic cultivable fungi rDNA internal transcribed spacer(ITS) Phylogenetic analysis Total DNA diversity analysis

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Primary Prostatic Tuberculosis: A Rare Entity

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Open Journal of Urology 2022年第2期12卷 129-135页

作者： Tiéoulé Mamadou Traore Abdoul Kader Tapsoba Kays Chaker amine Hermi Kheireddine Mrad Dali Mokhtar Bibi Yassine Ouanes ahmed Sellami Sami Ben Rhouma Yassine Nouira University of Ouahigouya Ouahigouya Burkina Faso Department of Urology La Rabta Hospital Tunis Tunisia University of Joseph Ki-Zerbo Ouagadougou Burkina Faso Faculty of Medicine of Tunis University Tunis Manar Tunis Tunisia

Objectives: To clarify the clinical, histological and therapeutic features of prostatic tuberculosis. Methods: We conducted a single-centre retrospective descriptive study of all patients presenting with prostatic tuberculosis between January 2002 and December 2020. Patients who were lost to follow-up, could not be reached by telephone or whose records were not usable were excluded from this study. Results: 240 patients were treated for urogenital tuberculosis, including 13 for isolated prostatic tuberculosis. The average age of the patients was 75 years. None of our patients had a history of tuberculosis. The average of international prostate symptom score (IPSS) was 27. Lower urinary tract symptoms in the filling phase were predominant. The digital rectal examination was suspicious in only one patient. The mean preoperative PSA was 9.24 ng/ml. 46.15% of patients underwent transurethral resection of the prostate and 53.85% underwent ultrasound-guided prostate biopsy. Histological examination showed epithelioid gigantocellular granuloma with isolated caseous necrosis in 61.53% of patients and associated adenomyomatous hyperplasia in 38.47% of patients. Antituberculosis treatment was given for 6 months. The average of follow up was 15 months. All patients reported an improvement in clinical signs with a mean post operative IPSS score of 17 and a normalisation of PSA levels. Conclusion: Isolated prostatic tuberculosis is a rare entity, it can simulate a cancer. In front of the symptoms of the lower urinary tract, the clinicians must think of it especially in the developing countries where tuberculosis still prevails in an endemic state.

关键词： Prostatic Tuberculosis Epithelioid Gigantocellular Granuloma Antituberculosis Treatment

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Osseointegration of porous titanium and tantalum implants in ovariectomized rabbits:A biomechanical study

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World Journal of Orthopedics 2021年第4期12卷 214-222页

作者： Stanislav Bondarenko Volodymyr Filipenko Michael Karpinsky Olena Karpinska Gennadiy Ivanov Valentyna Maltseva ahmed amine Badnaoui Ran Schwarzkopf Department of Joint Pathology Sytenko Institute of Spine and Joint PathologyKharkiv 61124Ukraine Department of Biomechanics Sytenko Institute of Spine and Joint PathologyKharkiv 61124Ukraine Department of Experimental Pathology Sytenko Institute of Spine and Joint PathologyKharkiv 61124Ukraine Morphology of Connective Tissue Department Sytenko Institute of Spine and Joint PathologyKharkiv 61124Ukraine Department of Orthopedic Surgery NYU Langone Orthopedic HospitalHospital for Joint DiseasesNew YorkNY 10003United States

BACKGROUND Today,biological fixation of uncemented press-fit acetabular components plays an important role in total hip ***-term stable fixation of these implants depends on the osseointegration of the acetabular cup bone tissue into the acetabular cup implant,and their ability to withstand functional *** To compare the strength of bone-implant osseointegration of four types of porous metal implants in normal and osteoporotic bone in *** The study was performed in 50 female California rabbits divided into nonovariectomized(non-OVX)and ovariectomized groups(OVX)at 6 mo of *** were sacrificed 8 wk after the implantation of four biomaterials[TTM,CONCELOC,Zimmer Biomet's Trabecular Metal(TANTALUM),and ATLANT]in a 5-mm diameter defect created in the left femur.A biomechanical evaluation of the femur was carried out by testing implant breakout *** force was gradually increased until complete detachment of the implant from the bone *** The breakout force needed for implant detachment was significantly higher in the non-OVX group,compared with the OVX group for all implants(TANTALUM,194.7±6.1 N vs 181.3±2.8 N;P=0.005;CONCELOC,190.8±3.6 N vs 180.9±6.6 N;P=0.019;TTM,186.3±1.8 N vs 172.0 N±11.0 N;P=0.043;and ATLANT,104.9±7.0 N vs 78.9 N±4.5 N;P=0.001).In the OVX group,The breakout forces in TANTALUM,TTM,and CONCELOC did not differ significantly(P=0.066).The breakout force for ATLANT in the OVX group was lower by a factor of 2.3 compared with TANTALUM and CONCELOC,and by 2.2 compared with TTM(P=0.001).In the non-OVX group,the breakout force for ATLANT was significantly different from all other implants,with a reduction in fixation strength by a factor of 1.9(P=0.001).CONCLUSION TANTALUM,TTM,and CONCELOC had equal bone-implant osseointegration in healthy and in osteoporotic *** had significantly decreased osseointegration(P=0.001)in healthy and in osteoporotic bone.

关键词： Animals Bone-implant interface Osteoporosis Femur Tantalum Titanium

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Hyperbaric Oxygen Therapy: Focus

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Open Journal of Emergency Medicine 2018年第1期6卷 15-20页

作者： ahmed amine El Oumri Hiba Badi Saloua Khaloufi Physical Medicine and Rehabilitation Unit Oujda University Hospital Oujda Morocco Faculty of Medicine Oujda Morocco Physical Medicine and Rehabilitation Unit HMVIM Rabat Morocco

Hyperbaric oxygen therapy is now an integral part of the current therapeutic arsenal, it is a treatment that has a large number of indications and which concerns several specialties. This development aims to summarize... 详细信息

关键词： Hyperbaric Oxygen Therapy

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Diffuse Lipomatosis of Thyroid—Case Report

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Surgical Science 2018年第12期9卷 469-473页

作者： Jahid ahmed Ratbi El amine Chad Bouziane Surgical Clinic B University Hospital Ibn Sina Rabat Morocco Department of Pathology University Hospital Ibn Sina Rabat Morocco

Diffuse lipomatosis of thyroid gland is very rare disease, characterized by diffuse proliferation of adipose tissue in the thyroid gland, the pathophysiology of adipose tissue infiltration in the thyroid gland remains unknown. We report a case of a 55-year-old female who presented 6 months ago a dysphonia, ultrasound of the neck revealed the presence diffuse goiter with heterogeneous echogenicity, her thyroid hormone levels were normal, thyroid isotope scanning showed heterogeneous uptake of radioactivity and coexistence of cold and hot nodules. The patient underwent total thyroidectomy. Histological study concluded to the diagnosis of diffuse lipomatosis of thyroid gland.

关键词： Diffuse Lipomatosis of Thyroid

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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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Trend Analysis of Large-Scale Twitter Data Based on Witnesses during a Hazardous Event: A Case Study on California Wildfire Evacuation

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World Journal of Engineering and Technology 2021年第2期9卷 229-239页

作者： Syed A. Morshed Khandakar Mamun ahmed Kamar amine Kazi Ashraf Moinuddin Department of Civil and Environmental Engineering College of Engineering and Computing Florida International University Miami Florida United States School of Computing and Information Sciences Florida International University Miami Florida United States Department of Computer Engineering University of Memphis Memphis Tennessee United States

Social media data created a paradigm shift in assessing situational awareness during a natural disaster or emergencies such as wildfire, hurricane, tropical storm etc. Twitter as an emerging data source is an effective and innovative digital platform to observe trend from social media users’ perspective who are direct or indirect witnesses of the calamitous event. This paper aims to collect and analyze twitter data related to the recent wildfire in California to perform a trend analysis by classifying firsthand and credible information from Twitter users. This work investigates tweets on the recent wildfire in California and classifies them based on witnesses into two types: 1) direct witnesses and 2) indirect witnesses. The collected and analyzed information can be useful for law enforcement agencies and humanitarian organizations for communication and verification of the situational awareness during wildfire hazards. Trend analysis is an aggregated approach that includes sentimental analysis and topic modeling performed through domain-expert manual annotation and machine learning. Trend analysis ultimately builds a fine-grained analysis to assess evacuation routes and provide valuable information to the firsthand emergency responders.

关键词： Wildfire Evacuation Twitter Large-Scale Data Topic Model Sentimental Analysis Trend Analysis

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Composition and antimicrobial activity of Cistus munbyi essential oil: an endemic plant from Algeria

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Journal of Forestry Research 2017年第6期28卷 1127-1132页

作者： Fethi Benbelaid Abdelmounaim Khadir Mourad Bendahou Mohamed amine Abdoune Alain Muselli Jean Costa Laboratory of Applied Microbiology in Food Biomedical and Environment Aboubekr Belkad UniversityP.O. Box 119 13000 Tlemcen Algeria Department of Biology University of Oran 1 Ahmed Ben Bella Es Senia Oran Algeria Laboratory of Natural Products Chemistry University of Corsica UMR CNRS 6134 Campus Grimaldi BP 5220250 Corte France Department of Biology Faculty of Sciences of Nature LifeEarth and Universe Aboubekr Belkad UniversityP.O. Box 119 13000 Tlemcen Algeria

The chemical composition and antimicrobial potential of Cistus munbyi essential oil were studied for the first time. GC and GC–MS analysis revealed 48 compounds representing 96.98% of the oil. Terpinen-4-ol(23.75%), meta-Cymene(17.30%), and Sabinene(12.38%)were the major constituents. Antimicrobial activity was evaluated against nine pathogens using the disc diffusion and broth micro-dilution methods. Results show that *** essential oil possesses strong antimicrobial activity against all strains, regardless if Gram-positive or Gramnegative bacteria, or yeast, with MICs values not exceeding10(mg/ml). In addition to its efficacy, C. munbyi essential oil has an unusual antimicrobial potency which is attributed to its specific chemical composition. Thus, findings presented here suggest that endemic C. munbyi contains a very interesting essential oil that may be valuable in several areas.

关键词： Antimicrobial activity Chemical composition Cistus munbyi Essential oil

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