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Wear properties of copper and copper composites powders consolidated by high-pressure torsion

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Friction 2020年第2期8卷 433-450页

作者： Mohamed Ibrahim abd el AAL Mechanical Engineering Department College of EngineeringPrince Sattam Bin Abdulaziz UniversityWadi Addawaser 11991Saudi Arabia Mechanical Design&Production Department Faculty of EngineeringZagazig UniversityZagazig 44519Egypt

The wear characteristics of Cu and Cu-SiC composite microsize powders consolidated by cold compaction combined with sintering or high-pressure torsion(HPT)were *** HPT processed(HPTed)samples with bimodal and trimodal microstructures and fine Cu grains and SiC particle sizes have superior hardness,reasonable ductility level,and high wear *** wear mass loss and coefficient of friction of HPTed samples were remarkably lower than that of cold-compacted and sintered samples as well as that of micro and nano Cu and Cu-SiC composites from previous *** sample fabrication method has an apparent influence on the wear *** wear mechanism was converted from adhesive,delamination,three-body mechanism,grooves(take off the SiC particles),and cracks into abrasive wear after *** can be considered a dominant wear mechanism in all *** worn surface morphology and analysis support the relationship between wear mechanism and characteristics.

关键词： Cu-SiC composite powders high-pressure torsion(HPT) fine and coarse grains wear characteristics worn surface morphology

Anatomical and Molecular Identification of Ornamental Plant Ficus ***

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Phyton-International Journal of Experimental Botany 2023年第5期92卷 1329-1347页

作者： Abtisam Binnoubah Rim Hamdy Osama G.Ragab Ahmed M.el-Taher Ahmed Abou el-Yazied Fatmah A.Safhi Hala A.elzilal Ashwaq T.Althobaiti Salha M.ALshamrani Diaa abd el Moneim Ahmed el-Banhawy Department of Botany Faculty of ScienceUniversity of SabrathaSabratha999116Libya Department of Botany Faculty of ScienceCairo UniversityGiza12111Egypt Department of Botany and Microbiology Faculty of Science(Boys Branch)Al-Azhar UniversityCairo11884Egypt Department of Agricultural Botany Faculty of AgricultureAl-Azhar UniversityCairo11884Egypt Department of Horticulture Faculty of AgricultureAin Shams UniversityCairo11566Egypt Department of Biology College of SciencePrincess Nourah bint Abdulrahman UniversityRiyadh11671Saudi Arabia Department of Science and Technology College of RanyahTaif UniversityTaif21944Saudi Arabia Department of Biology College of ScienceTaif UniversityTaif21944Saudi Arabia Department of Biology College of ScienceUniversity of JeddahJeddah21959Saudi Arabia Department of Plant Production(Genetic Branch) Faculty of Environmental Agricultural SciencesArish UniversityEl-Arish45511Egypt Department of Botany and Microbiology Faculty of ScienceSuez Canal UniversityIsmailia41522Egypt

This present study includes twelve species that represent the Ficus genus,namely;aspera,carica,tinctoria ***,hirta,hispida,neriifolia,palmata,pumila,racemosa,septica,sur,and sycomorus,belonging to the Moraceae *** species samples were collected from various locations in *** study focused on the anatomical and molecular characteristics of mature foliage *** the identification and classification of taxa are highly dependent on the anatomical features of leaves,the anatomical characteristics were recorded in the form of a comparison between the examined plants in the data *** study aims to contribute to the identification of the studied species based on the anatomical details of the matured *** characterization includes the variations in upper and lower epidermal layers that are covered by a thin or thick cuticle;the number of palisade and spongy layers;crystals;secretory elements;lithocysts;the midrib zone has parenchyma associated with mechanical tissue,vascular system,and investigation of trichomes;on the other hand,in the current study,the phylogenetic analysis was conducted by using the ITS and 5.8 S *** the analysis of all the available data,it could be stated that there is an overall agreement with the anatomical character dendrogram.

关键词： ITS trichomes leaf anatomy Ficus moraceae

Utilizing Social Media Data Analytics to Enhance Banking Services

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Intelligent Information Management 2022年第1期14卷 1-14页

作者： Mohamed abd el-Hamid Farag Ahmed Askar Amal elsayed Aboutabl amr Galal Business Information Systems Faculty of Commerce and Business Administration Helwan University Cairo Egypt Faculty of Computers and Artificial Intelligence Helwan University Cairo Egypt Faculty of Commerce and Business Administration Helwan University Cairo Egypt

The two most important challenges facing banks today are attracting new customers and retaining their existing ones. Research shows that 30 percent of banks cited customer loyalty as their biggest challenges. Thus, given that customer loyalty is completely connected to customer delight. The challenging question is: How do banks achieve customer delight by making every interaction a pleasant experience? In our viewpoint “The key is to stop treating customers as segments and personalize all customer interactions and services which can be achieved by using the latest technological advancements in Big Data Analytics, Artificial Intelligence (AI) and Machine Learning”. With the rapidly increasing usage of social media like Facebook, Twitter, LinkedIn, and Instagram, business organizations are now moving towards adapting this technology to drive business advantages. This research will explore the power of social media and how it can be used by banks to provide an edge over their competitors by providing improved products and services to their customers thereby making their experience easy and responsive. It also proposes a framework for social media analytics and its important components to address all the technical and business aspects of the retail and online banking, however, what customer expects from this medium and what banks offer to them needs to be widely studied and understood.

关键词： Natural Language Processing (NLP) Sentiment Analysis Social Banking Information Retrieval (IR) Social Media Analytics

用于高性能硫化镉敏化太阳能电池对电极的硫化铜/还原氧化石墨烯纳米复合材料的合成(英文)

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新型炭材料 2018年第1期33卷 26-35页

作者： amr Hessein Ahmed abd el-Moneim Department of Materials Science and Engineering Egypt-Japan University of Science and TechnologyNew Borg El Arab City Alexandria 21934 Egypt Department of Mathematical and Physical Engineering Faculty of Engineering ( Shoubra) Benha U

用一釜水热合成法制备了硫化铜/还原氧化石墨烯纳米复合材料,改变前驱体中石墨烯含量,得到具有不同石墨烯含量的纳米复合材料。所制备的纳米复合材料首先和聚偏氟乙烯粘结剂混合,再涂覆在SnO2 _(x-)Fx基体上,得到以CdS敏化TiO2为负极的... 详细信息

用一釜水热合成法制备了硫化铜/还原氧化石墨烯纳米复合材料,改变前驱体中石墨烯含量,得到具有不同石墨烯含量的纳米复合材料。所制备的纳米复合材料首先和聚偏氟乙烯粘结剂混合,再涂覆在SnO2 _(x-)Fx基体上,得到以CdS敏化TiO2为负极的量子点太阳能电池的对电极,并与传统的Cu2 S/Cu对电极进行比较。用场发射扫描电子显微镜、X-射线衍射、拉曼光谱、循环伏安和阻抗谱技术表征了纳米复合材料对电极的微观结构和性能。结果表明:硫化铜/还原氧化石墨烯纳米复合材料优于Cu2 S/Cu对电极。前驱体中石墨烯的含量显著影响了硫化铜纳米晶的化学计量比和形貌。当前驱体石墨烯含量在中等水平下,获得了具有更多供S2_(-x)离子还原的活性位的优化的硫化铜/还原氧化石墨烯纳米复合材料。以此优化的纳米复合材料为对电极制备的量子点太阳能电池在100 mW/cm2的光照强度下具有高的、稳定的和可重复的_(2.)36%的能量转化效率,高于用Cu2 S/Cu为对电极的能量转化效率。此性能的提升归因于硫化铜纳米晶和导电的还原氧化石墨烯之间的协同作用,还原氧化石墨烯充当共催化剂和导电促进剂,降低对电极的内阻并加快多硫化物的还原。

关键词：还原氧化石墨烯硫化铜量子点太阳能电池多硫化物电解质

The potency of N,N′-diphenyl-1,4-phenylenediamine and adiposederived stem cell co-administration in alleviating hepatorenal dysfunction complications associated with type 1 diabetes mellitus in rats

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BIOCelL 2023年第8期47卷 1885-1895页

作者： HANY M.abd el-LATEEF SAFA H.QAHL EMAN FAYAD SARAH A.ALTALHI IBRAHIM JAFRI el SHAIMAA SHABANA MARWA K.DARWISH REHAB MAHER SAAD SHAABAN SHADY G.el-SAWAH Department of Chemistry College of ScienceKing Faisal UniversityAl-AhsaSaudi Arabia Chemistry Department Faculty of ScienceSohag UniversitySohagEgypt Department of Biology College of ScienceUniversity of JeddahJeddahSaudi Arabia Department of Biotechnology College of ScienceTaif UniversityTaifSaudi Arabia Fellow of Biochemistry Genetic UnitChildren HospitalFaculty of MedicineMansoura UniversityMansouraEgypt Chemistry Department(Biochemistry Branch) Faculty of ScienceSuez UniversitySuezEgypt Department of Clinical Laboratories Sciences College of Applied Medical SciencesShaqra UniversityRiyadhSaudi Arabia Biology Department Faculty of ScienceMansoura UniversityMansouraEgypt Department of Chemistry Organic Chemistry DivisionCollege of ScienceMansoura UniversityMansouraEgypt Zoology Department Faculty of ScienceArish UniversityNorth SinaiEgypt

Background:The increasing occurrence of diabetes mellitus(DM)noted worldwide has considerably elicited concern in the recent *** is associated with elevated vascular complications,morbidity,mortality,and poor quality of *** this context,mesenchymal stem cells(MSCs)have shown significant therapeutic potentialities in managing and curing type 1 DM owing to their self-renewable,immunosuppressive,and differentiation *** investigated the potential action of N,N′-diphenyl-1,4-phenylenediamine(DPPD),a well-known synthetic antioxidant to enhance the therapeutic ability of the adipose-derived stem cells(AD-MSCs)in alleviating kidney and liver complications in diabetic ***:Over the four weeks of experiments,albino male rats(n=36)were split into six test groups:control,DPPD(250 mg/kg,i.p.),STZ-diabetic(D),D+DPPD,D+AD-MSCs(1×10^(6)cell/rat,i.v.),and D+AD-MSCs+DPPD treated ***:Significant declines in the renal and hepatic oxidative stress markers(MDA,ROS,and AGEs)were observed coupled with a significant elevation in many antioxidant marker levels(GSH,SOD,CAT,GPx,HO-1,and TAC)in the diabetic rats treated with either DPPD or AD-MSCs or their co-administered injection compared to the diabetic untreated *** was suggested to be the leading cause of amelioration of the kidney functions(as measured by urea,uric acid,and creatine levels)and liver functions(as evidenced by the levels of AST,ALT,ALP,bilirubin,total proteins,albumin,and globulins).Conclusion:DPPD and AD-MSCs co-administration showed superior results in terms of the enhancement of the relative hepato-renal function,indicating the beneficial role of DPPD supplementation in increasing the therapeutic potential of AD-MSCs.

关键词： Antioxidants Diabetic nephropathy DPPD Oxidative stress Stem cells

In vitro assessment of antioxidant,neuroprotective,anti-urease and anti-tyrosinase capacities of Tamarix africana leaves extracts

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Journal of Traditional Chinese Medicine 2023年第2期43卷 252-264页

作者： Esma Anissa Trad Khodja abd el Hamid Khabtane Rabah Arhab Djamila Benouchenne Mohamed Sabri Bensaad Chawki Bensouici Ramazan Erenler Biotechnology WaterEnvironment and Health LaboratoryFaculty of Natural and Life SciencesUniversity Abbes LaghrourKhenchela 40000Algeria Laboratory of Natural Substances Biomolecules and Biotechnological ApplicationsFaculty of Natural and Life SciencesUniversity Larbi Ben M HidiOum El-Bouaghi 04000Algeria Genetics Biochemistry and Plant Biotechnology LaboratoryFaculty of Natural and Life SciencesUniversity Constantine 1Constantine 25000Algeria Pharmaceutical Sciences Research Center Constantine 25000Algeria Laboratory of Cellular and Molecular Physio-Toxicology-Pathology and Biomolecules(LPTPCMB) Faculty of Natural and Life SciencesUniversity Batna 2Batna 05000Algeria Laboratory of Biotechnology of Bioactive Molecules and Cellular Physiopathology(LBMBPC) Faculty of Natural and Life Sciences University Batna 2Batna 05000Algeria Biotechnology Research Center Ali Mendjli UV 03 Constantine 25000Algeria Department of Chemistry Faculty of Science and LiteratureUniversity TokatGaziosmanpasaTokat 60250Turkey

OBJECTIVE:To characterize the chemical profile of methanolic crude extract and its fractions(Ethyl acetate,n-butanol and aqueous)using liquid chromatographymass spectrometry(LC-MS)analysis,to evaluate their biological and pharmacological properties:antioxidant(1,1-diphenyl-2-pycrylhydrazyl(DPPH),2,2′-azino-bis(3-ethylbenzothiazoline-6-sulphonic)(ABTS·+),galvinoxyle free radical scavenging,reducing power,phenanthroline andβcarotene-linoleic acid bleaching assays),enzymes inhibitory ability against several enzymes[acetylcholinesterase(AChE),buthyrylcholinesterase(BChE),urease and tyrosinase].METHODS:Secondary metabolites were extracted from Tamarix africana air-dried powdered leaves by maceration,the crude extract was fractionated using different solvents with different polarities(Ethyl acetate,n-butanol and aqueous).The amount of polyphenols,flavonoids and tannins(hydrolysable and condensed)were determined using colorimetric assays.A variety of in vitro biochemical tests were carried out to assess antioxidant and oxygen radical scavenging properties using DPPH,ABTS,galvinoxyle free radical scavenging,reducing power,phenanthroline andβcarotene-linoleic acid bleaching *** effect was examined against acetylcholinesterase and buthyrylcholinesterase *** anti-urease and antityrosinase activities were performed against urease and tyrosinase enzymes *** extract’s components were identified using LC-MS and compared to reference ***:The results indicated that Tamarix africana extracts presented a powerful antioxidant activity in all assays and exhibited a potent inhibitory effect against AChE and BChE as well as urease and tyrosinase ***-MS analysis identified amount of eight phenolic compounds were revealed in this analysis;Apigenin,Diosmin,Quercetin,Quercetine-3-glycoside,Apigenin 7-O glycoside,Rutin,Neohesperidin and Wogonin in methanolic extract and its different fractions of Tamarix africana from ***

关键词： antioxidants anti-tyrosinase anti-urease liquid chromatography-mass spectrometry neuroprotection phenolic content Tamarix africana

Performance Analysis of an Artificial Intelligence Nanosystem with Biological Internet of Nano Things

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Computer Modeling in Engineering & Sciences 2022年第10期133卷 111-131页

作者： Saied M.abd el-atty Nancy A.Arafa Atef Abouelazm Osama Alfarraj Konstantinos A.Lizos Farid Shawki Department of electronics and electrical Communications Engineering Faculty of Electronic EngineeringMenoufia UniversityMenoufEgypt Computer Science Department Community CollegeKing Saud UniversityRiyadhSaudi Arabia Department of Informatics Faculty of Mathematics and Natural SciencesUniversity of Oslo(UiO)OsloNorway

Artificial intelligence(AI)has recently been used in nanomedical applications,in which implanted intelligent nanosystems inside the human body were used to diagnose and treat a variety of ailments with the help of the Internet of biological Nano Things(IoBNT).Biological circuit engineering or nanomaterial-based architectures can be used to approach the *** nanomedical applications,the blood vascular medium serves as a communication channel,demonstrating a molecular communication system based on flow and *** paper presents a performance study of the channel capacity for flow-based-diffusive molecular communication nanosystems that takes into account the ligand-receptor binding *** earlier studies,we take into account the effects of biological physical characteristics such as blood pressure,blood viscosity,and vascular diameter on channel ***,in terms of drug transmission error probability,the inter-symbol interference(ISI)phenomenon is applied to the proposed *** numerical results show that the proposed AI nanosystems-based IoBNT technology can be successfully implemented in future nanomedicine.

关键词： Nanosystem AI Internet of biological Nano Things(IoBNT) channel capacity

Effects of punch size, magnetic field, and magnetorheological elastomers medium on forming T-shaped thin-walled Inconel 718 tubes

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Chinese Journal of Aeronautics 2022年第1期35卷 226-237页

作者： Qiucheng YANG Cheng CHENG Ali abd el-ATY Chunmei LIU Shenghan HU Yao QIN Tao LI Cong WU Yong XU Xunzhong GUO College of Material Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 211100China Jiangsu Key Laboratory of Advanced Structural Materials and Application Nanjing 211100China Institute of Metal Research Chinese Academy of SciencesShenyang 110016China

This study aims at investigating the impact of using the Magnetorheological elastomers(MREs)medium to improve the formability of T-shaped Inconel 718 tubes during the bulging ***,the influence of the punch size and the intensity of the magnetic field on the branch height and wall thickness distribution of the T-shaped Inconel 718 tubes are also *** results showed that the parts formed by the punch with a length of 5 mm in the pressurization zone have better forming *** external magnetic field can promote a high branch,and by increasing the intensity of the magnetic field,the branch height was increased and then *** the same time,the magnetic field reduced the amount of material accumulation between the guiding zone and the bulging ***,it promotes the material in the guiding zone to enter the bulging zone and improve the bulging ability of the T-shaped tube.

关键词： Magnetic field strength Magnetorheological elastomers(MREs) Pressurization zone T-shaped tube Wall thickness distribution

Physical Studies of Some Hydrazinobenzoic Acid Complexes

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Journal of Materials 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 Gamel 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 complexes of 2-hydrazinobenzoic acid and 4-hydrazinobenzoic acid with Ni (Ⅱ), Cu (Ⅱ), Zn (Ⅱ), Cd (Ⅱ), and Hg (Ⅱ) were determined potentiometricaIly at different temperatures. The thermodynamic parameters, △G0, △H0, and △S0 were calculated and proved that the complexation process is spontaneous and endothermic. The thermodynamic functions were analyzed in terms of electrostatic and non-electrostatic components and the results reveal that ionic bonds are formed between the studied ligands and metal ions. Conductometric titration was shown that the stoichiometry of the formed complexes are M:L and M:2L. The structure of the prepared solid complexes was characterized using IR, 1H NMR, 13C NMR spectroscopies as well as X-ray diffraction technique. Finally electrical conductivity of the ligands and their copper complexes was measured and shown that the ligands have a semiconductor behaviour.

关键词： Potentiometric titration Stability constants Thermodynamic parameters Structure of metal complexes