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Emerging Contaminants 2024年第1期10卷 32-46页

作者： Eyad A.Younes Amjad h.el-Sheikh Rawan B.Alsmadi Department of Chemistry Faculty of ScienceThe Hashemite UniversityP.O.Box 330127Zarqa13133Jordan

In the present work,some novel α-amino nitriles were prepared:amino-2-(anthracen-9-yl)acetonitrile(AAN),and 2-(naphthalen-1-yl)-2-((triethoxysilyl)propyl)amino)acetonitrile(Si-AN).With the aid of other organic compounds(3-aminopropyl triethoxysilane“APTES”and tetraethyl orthosilicate“TEOS”),the following carbon nanotubes“CNT”and magnetite“Mag”based adsorbents were prepared:CNT-AAN,Mag-SiO_(2),Mag-SiO_(2)-APTES,Mag-SiO_(2)-*** FT-IR,1h and 13C NMR spectroscopy proved the formation of(C triple bond N)and(Nh-)bonds which indicated successful amino nitrile modification of the *** ability of the above-mentioned adsorbents to remove cadmium“Cd(II)”from water was studied at various ph *** modification with AAN reduced Cd(II)uptake,while all Mag modifications increased Cd *** addition of AAN to the extraction medium with CNT sorbent reduced Cd(II)*** addition of TEOS and Si-AN to the extraction medium for Cd(II)removal using Mag was studied where a positive impact was *** on the above experiments,it was decided to use Mag as adsorbent with the addition of Si-AN to the extraction *** optimization recommended ph 8 and Cd:Si-AN molar ratio of 1:*** maximum adsorption capacity towards Cd(II)achieved in this study was 65 mg g^(−1).The method selectivity,re-usability and applicability on well water and tap water samples gave appropriate *** adsorption of Cd(II)on Mag in the presence of Si-AN was fast,endothermic,spontaneous,favored and physi-sorption was predominant.

关键词： Amino nitriles Magnetite Carbon nanotubes Cadmium uptake

Optimization Task Scheduling Using Cooperation Search Algorithm for heterogeneous Cloud Computing Systems

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Computers, Materials & Continua 2023年第1期74卷 2133-2148页

作者： Ahmed Y.hamed M.Kh.elnahary Faisal S.Alsubaei hamdy h.el-Sayed Department of Computer Science Faculty of Computers and Artificial IntelligenceSohag UniversitySohag82524Egypt Department of Cybersecurity College of Computer Science and EngineeringUniversity of JeddahJeddah21959Saudi Arabia

Cloud computing has taken over the high-performance distributed computing area,and it currently provides on-demand services and resource polling over the *** a result of constantly changing user service demand,the task scheduling problem has emerged as a critical analytical topic in cloud *** primary goal of scheduling tasks is to distribute tasks to available processors to construct the shortest possible schedule without breaching precedence *** and schedules of tasks substantially influence system operation in a heterogeneous multiprocessor *** diverse processes inside the heuristic-based task scheduling method will result in varying makespan in the heterogeneous computing *** a result,an intelligent scheduling algorithm should efficiently determine the priority of every subtask based on the resources necessary to lower the *** research introduced a novel efficient scheduling task method in cloud computing systems based on the cooperation search algorithm to tackle an essential task and schedule a heterogeneous cloud computing *** basic idea of thismethod is to use the advantages of meta-heuristic algorithms to get the optimal *** assess our algorithm’s performance by running it through three scenarios with varying numbers of *** findings demonstrate that the suggested technique beats existingmethods NewGenetic Algorithm(NGA),Genetic Algorithm(GA),Whale Optimization Algorithm(WOA),Gravitational Search Algorithm(GSA),and hybrid heuristic and Genetic(hhG)by 7.9%,2.1%,8.8%,7.7%,3.4%respectively according to makespan.

关键词： heterogeneous processors cooperation search algorithm task scheduling cloud computing

A DNA sensor based on upconversion nanoparticles and two-dimensional dichalcogenide materials

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Frontiers of Chemical Science and Engineering 2021年第4期15卷 935-943页

作者： Konstantina Alexaki Davide Giust Maria-eleni Kyriazi Afaf h.el-Sagheer Tom Brown Otto L.Muskens Antonios G.Kanaras School of Physics and Astronomy Faculty of Engineering and Physical SciencesUniversity of SouthamptonSouthampton SO171BJUK Department of Chemistry University of OxfordChemistry Research LaboratoryOxford OX13TAUK Chemistry Branch Department of Science and MathematicsFaculty of Petroleum and Mining EngineeringSuez UniversitySuez 43721Egypt Institute for Life Sciences University of SouthamptonSouthampton SO171BJUK

We demonstrate the fabrication of a new DNA sensor that is based on the optical interactions occurring between oligonucleotide-coated NaYF4:Yb^(3+);Er^(3+) upconversion nanoparticles and the two-dimensional dichalcogenide materials,MoS_(2) and WS_(2).Monodisperse upconversion nanoparticles were functionalized with single-stranded DNA endowing the nanoparticles with the ability to interact with the surface of the two-dimensional materials via van der Waals interactions leading to subsequent quenching of the upconversion *** contrast,in the presence of a complementary oligonucleotide target and the formation of double-stranded DNA,the upconversion nanoparticles could not interact with MoS_(2) and WS_(2),thus retaining their inherent fluorescence *** this sensor we were able to detect target oligonucleotides with high sensitivity and specificity whilst reaching a concentration detection limit as low as 5 mol·L^(-1),within minutes.

关键词： upconversion nanoparticles DA sensor two-dimensional materials MoS_(2) WS_(2)

hydroxysafflor yellow A protects against thioacetamide-induced liver fibrosis in rats via suppressing proinflammatory/fibrogenic mediators and promoting hepatic stellate cell senescence and apoptosis

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Asian Pacific Journal of Tropical Biomedicine 2023年第8期13卷 348-358页

作者： Sayed h.Seif el-Din Olfat A.hammam Shahira M.Ezzat Samira Saleh Marwa M.Safar Walaa h.el-Maadawy Naglaa M.el-Lakkany Pharmacology Department Theodor Bilharz Research InstituteWarak El-HadarImbaba P.O.Box 30Giza 12411Egypt Pathology Department Theodor Bilharz Research InstituteWarak El-HadarImbaba P.O.Box 30Giza 12411Egypt Pharmacognosy Department Faculty of PharmacyCairo UniversityCairo 11562Egypt Pharmacognosy Department Faculty of PharmacyOctober University for Modern Sciences and ArtsGizaEgypt Pharmacology and Toxicology Department Faculty of PharmacyCairo UniversityCairo 11562Egypt Pharmacology and Biochemistry Department Faculty of PharmacyThe British University in EgyptCairoEgypt

Objective:To evaluate the effect of hydroxysafflor yellow A(hSYA)on thioacetamide-induced liver ***:Thioacetamide was administered to rats intraperitoneally in doses of 200 mg/kg twice a week for 12 ***-intoxicated rats were given silymarin(50 mg/kg)or hSYA(5 mg/kg)orally every day for 8 *** enzymes,fibrosis markers,histological changes as well as immunohistochemistry of TNF-α,IL-6,p21,α-SMA,and caspase-3 were *** effect of hSYA on hSC-T6 activation/proliferation and apoptosis was also determined in ***:hSYA decreased liver enzymes,TNF-α,IL-6,and p21 expressions,hepatic PDGF-B,TIMP-1,TGF-β1,and hydroxyproline levels,as well as fibrosis score(S2 vs.S4)compared to the thioacetamide *** also downregulatedα-SMA while increasing caspase-3 ***,at 500μg/mL,hSYA had only a slightly suppressive effect on hSC proliferation,with a 9.5%***,it significantly reduced TGF-β1,inhibitedα-SMA expression,induced caspase-3 expression,and promoted cell ***:hSYA may be a potential therapeutic agent for delaying and reversing the progression of liver *** research on hSYA at higher doses and for a longer period is warranted.

关键词： hydroxysafflor yellow A Thioacetamide hepatic stellate cells Inflammatory markers Liver fibrosis p21 α-SMA Apoptosis

Dynamic stress concentration in an infinitely long cylindrical cavity due to a point spherical source embedded within a fluid-saturated poroelastic formation of infinite extent

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 139-156页

作者： h.hOSSEINI O.BALILAShAKI Department of Mechanical Engineering Faculty of EngineeringGolestan University

The effects of a harmonically exciting monopole source on an infinitely long cylindrical cavity embedded entirely within a fluid-saturated poroelastic formation of infinite extent are examined theoretically. It is assumed that the source is located outside the cavity at a specified distance from the borehole axis. The magnitudes of the hoop and radial stresses beside the pore pressures exerted on the interface and inside the porous medium surrounding the borehole are calculated and discussed. Biot's poroelastic modeling along with three types of boundary conditions for the cylindrical interface including the ideal fluid, empty borehole, and rigid inclusion with a hard boundary is employed for the analysis. Utilizing a proper translational addition theorem for expressing the incident spherical wave in terms of cylindrical wave expansions, the proposed boundary conditions at the interface are satisfied. Stresses are formulated by means of wave potential functions in a three-dimensional(3D) manner. The effects of the frequency and the radial distance between the source and borehole on the induced stresses are examined for the first cylindrical modes over frequency spectra. Two permeability conditions for the interface and three types of soils for the porous formation are considered throughout the analysis. To give an overall outline of the study, a numerical example is presented. The results clearly indicate that the distance is a key parameter and has considerable effects on the induced stress values. In addition, the interface permeability condition and soil characteristics play an important role in determining the dynamic response of the borehole. Finally,the obtained results are compared with the relevant analyses existing in the literature for some limit cases, and good agreement is achieved.

关键词： cylindrical cavity O353.4 point source porous medium stress concentration wave-field transformation

Nanofibrous ε-polycaprolactone scaffolds containing Ag-doped magnetite nanoparticles: Physicochemical characterization and biological testing for wound dressing applications in vitro and in vivo

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Bioactive Materials 2021年第7期6卷 2070-2088页

作者： M.K.Ahmed M.A.Zayed S.I.el-dek Mayssa Abdel hady Doaa h.el Sherbiny Vuk Uskokovic Faculty of Nanotechnology for Postgraduate studies Cairo UniversityEl-Sheikh Zayed 12588Egypt Department of Physics Faculty of ScienceSuez UniversitySuez 43518Egypt Chemistry Department Faculty of ScienceCairo University12613GizaEgypt Materials Science and Nanotechnology Department Faculty of Postgraduate Studies for Advanced SciencesBeni-Suef UniversityBeni SuefEgypt Pharmaceutical Technology Department National Research CentreDokiiGizaEgypt Advanced Materials and Nanobiotechnology Laboratory TardigradeNano LLCIrvineCA92604USA Department of Biochemistry Faculty of DentistryModern University for Technology and InformationMokattamCairoEgypt

Skin wounds can lead to numerous complications with dangerous health *** this work,magnetite nanoparticles were doped with different concentrations of antimicrobial silver(Ag)ions and incorporated into the electrospun nanofibrous ε-polycaprolactone(PCL)*** and scaffolds with various Ag contents were characterized using a range of physicochemical *** entered magnetite as cations and preferentially positioned at tetrahedral sites,introducing lattice distortions and topographic *** of the structure due to accommodation of Ag expanded the lattice in the bulk and contracted it on the surface,where broadened distribution of Fe-O coordinations was *** spin canting and diminishing the double exchange interaction through altered distribution of ferric and ferrous ions,Ag softened the magnetism of *** making the nanoparticle structure more defective,Ag modified the interface with the polymer and promoted the protrusion of the nanoparticles from the surface of the polymeric nanofibers,thus increasing their roughness and hydrophilicity,with positive repercussions on cell adhesion and *** the viability of human melanocytes and the antibacterial activity against *** and *** increased with the concentration of Ag in the magnetite phase of the *** wound healing rate in rats also increased in direct proportion with the concentration of Ag in the magnetite phase,and no abnormalities in the dermal and epidermal tissues were visible on day 10 in the treatment *** results imply an excellent potential of these composite nanofibrous scaffolds for use as wound dressings and in other reconstructive skin therapies.

关键词： Tissue engineering Wound healing Skin Magnetic nanoparticles Nanofiber

Enhancing metformin efficacy with cholecalciferol and taurine in diabetes therapy:Potential and limitations

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World Journal of Diabetes 2025年第1期16卷 22-26页

作者： Gehan el-Akabawy Nabil Eid Department of Basic Medical Sciences College of MedicineAjman UniversityAjman 346United Arab Emirates Department of Anatomy Division of Human BiologySchool of MedicineIMU UniversityKuala Lumpur 57000Malaysia

Diabetes mellitus,particularly type 2 diabetes mellitus(T2DM),poses a significant global health *** management strategies primarily focus on glycemic control;however,there is a growing need for comprehensive approaches addressing the complex pathophysiology of diabetes *** recent study by Attia et al explores the potential of a novel therapy combining metformin with cholecalciferol(vitamin D3)and taurine to mitigate T2DM-related complications in a rat *** findings indicate that this treatment combination improves glycemic control and reduces oxidative stress,inflammation,and lipid ***,the study is limited by a lack of safety profile data and in-depth molecular mechanism *** editorial critically highlights the study's strengths and weaknesses,compares it against other combination therapy research in T2DM,and underscores the need to explore further the mechanisms underpinning the observed therapeutic effects and investigate the safety profile of this novel approach.

关键词： Diabetes Metformin Cholecalciferol Taurine hyperglycemia Oxidative stress Triglycerides

Assessing the Effectiveness of Solar Photovoltaic Powered Reverse Osmosis Desalination Systems across Different Water Resources in Saudi Arabia

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Open Journal of Modern hydrology 2025年第1期15卷 1-17页

作者： O. S. Abd el-Kawi Mechanical Engineering Department Faculty of Engineering Al-Baha University Al Baha Saudi Arabia Reactors Department Nuclear Research Center Egyptian Atomic Energy Authority Cairo Egypt

This study investigates the performance of a solar photovoltaic (PV)-powered reverse osmosis (RO) desalination system applied to diverse water sources in the Al-Baha region, Saudi Arabia, including seawater, groundwater, rainwater, municipal water, and brackish water. Key water quality parameters including Total Dissolved Solids (TDS), ph, electrical Conductivity (EC), salinity, and Specific Gravity (SG) were measured before and after desalination to assess system effectiveness. Results showed significant reductions in TDS, EC, and salinity levels across all water types, with seawater and brackish water achieving salt rejection rates of 98.32% and 99.16%, respectively. Post-desalination TDS for seawater decreased from 25,000 mg/L to 420 mg/L and for brackish water from 11,900 mg/L to 100 mg/L, achieving potable standards. ph values remained stable within potable standards, while EC values for seawater and brackish water dropped from 50,000 µS/cm to 484 µS/cm and from 12,000 µS/cm to 95 µS/cm, respectively. Water recovery rates varied from 70% to 95.33%, with the highest recovery observed in rainwater and groundwater samples. The overall desalination efficiency was highest for seawater and brackish water, at 82.96% and 84.5%, respectively, demonstrating the PV-RO system’s capability to provide high-quality, potable water from a variety of sources. This study underscores the potential of solar-powered RO technology as a sustainable solution for desalination in regions with diverse water sources and limited access to electricity.

关键词： Solar Photovoltaic (PV)-Powered Reverse Osmosis Water Sources

Comparison of the Predictive Value of Antral Follicle Count, Anti-Müllerian hormone and Follicle-Stimulating hormone in Women Following GnRh-Antagonist Protocol for Intracytoplasmic Sperm Injection

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Open Journal of Obstetrics and Gynecology 2017年第4期7卷 432-446页

作者： Shahinaz h.el-Shorbagy Departments of Obstetrics&Gynecology Faculty of MedicineTanta UniversityTantaEgypt

Background: Prediction of ovarian response is one of the prerequisites for women undergoing intracytoplasmic sperm injection (ICSI) treatment prior to the first controlled ovarian stimulation (COS) cycle. Predictive factors may be variable in patients pre-treated with oral contraceptives (OC) for scheduling purposes. Objective: To evaluate antral follicle count (AFC), anti-müllerian hormone (AMh) and basal follicle stimulating hormone (FSh) for predicting ovarian responses in patients under controlled ovarian hyperstimulation randomized to receive either oral contraceptives (OC) or no treatment (non-OC) prior to their first controlled ovarian stimulation (COS) cycle. Study Design: One hundred infertile women randomized to receive OC treatment or no treatment, prior to their first COS cycle;were stimulated with Gonadotropin Releasing hormone (GnRh) antagonist protocol. During the early follicular phase (day 2) of the two subsequent cycles (cycle A & cycle B) sonographic (AFC, ovarian volume) and endocrine data (AMh, basal FSh) were recorded. Transvaginal ultrasound was performed for all patients to monitor the ovarian response. Total number of oocytes retrieved and number of generated embryos were recorded and patients were categorized according to retrieved oocytes as poor (oocytes 12). Result(s): AFC, AMh and basal FSh were lower in users than in non-users of hormonal contraception. Poor responders showed less number of oocytes retrieved and had lower AFC and AMh but a higher basal FSh level was recorded in both groups (OC and non-OC). Conclusion: The better predictive value of AMh or AFC, as a single test or in combination will prevent cycle cancellations due to too low or too high ovarian response. AMh in OC group is not affected by OC pretreatment and is superior to other parameters, while AFC is superior to AMh and basal FSh in non-OC group.

关键词： AFC FSh AMh Ovarian Response GnRh Antagonist

La^3+ doped LiCo0.25Zn0.25Fe2O4 spinel ferrite nanocrystals:Insights on structural,optical and magnetic properties

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Journal of Rare Earths 2021年第1期39卷 75-82,I0003页

作者： M.I.A.Abdel Maksoud Ahmed el-Ghandour A.h.Ashour M.M.Atta Soraya Abdelhaleem Ahmed h.el-hanbaly Ramy Amer Fahim Said M.Kassem M.S.Shalaby A.S.Awed Materials Science Lab. Radiation Physics DepartmentNational Center for Radiation Research and Technology(NCRRT)Atomic Energy AuthorityCairoEgypt Center Photonics and Smart Materials(CPSM) Zewail City of Science and TechnologyOctober Gardens6th of October CityGizaEgypt Polymers Physics Lab. Radiation Physics DepartmentNational Center for Radiation Research and Technology(NCRRT)Atomic Energy AuthorityCairoEgypt Egyptian Nuclear and Radiological Regulatory Authority CairoEgypt Radiation Protection and Dosimetry Department National Center for Radiation Research and Technology(NCRRT)Atomic Energy AuthorityCairoEgypt Magnetic and Thermal Lab Solid State&Accelerators DepartmentNational Center for Radiation Research and TechnologyAtomic Energy AuthorityNasr CityCairoEgypt higher Institute for Engineering and Technology ManzalaDakahliaEgypt

This paper addresses the manipulation of structural,morphology,optical and magnetic properties of LiCo0.25Zn0.25Fe2 O4 ferrite via incorporation of different proportions of La^3+at the expense of iron ions using a sol-gel *** samples were characterized using the X-ray diffraction technique(XRD),Fourier transform infrared(FT-IR)spectroscopy,the energy dispersive X-ray spectra(EDX),inductively coupled plasma optical emission spectroscopy(ICP-OES),high resolution scanning electron microscopy(SEM),Brunauer-Emmett-Teller(BET)surface area analysis,ultraviolet-diffuse reflectance spectroscopy(UV-DRS),and vibrating sample magnetometer(VSM)*** Rietveld refinements of the samples indicate that at higher concentrations of La^3+,nanostructures with dual phase,*** spinel and orthorhombic LaFeO3 perovskite with space group(Pbnm)*** studies show that the energy band gap(Eg)of the bare LiCo0.25Zn0.25Fe2 O4 ferrite sample(2.18 eV)reaches up to 2.47 eV at x=0.06 and above this concentration,it drops sharply to 2.00 *** the saturation magnetization and the coercivity of LiCo0.25Zn0.25LaxFe2-xO4 are lower than that of LiCo0.25Zn0.25Fe2 O4 ***,the superparamagnetic nature and low values of saturation magnetization and coercivity of LiCo0.25Zn0.25LaxFe2-xO4 NPs are suitable to be applied in transformers core.

关键词： Li-Co-Zn ferrite Superparamagnetic nature Optical properties Magnetic behavior Transformers core Rare earths