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The possible source of uranium mineralization in felsic volcanic rocks,Eastern Desert,Egypt of the Arabian-Nubian Shield:Constraints from whole-rock geochemistry and spectrometric prospection

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Acta Geochimica 2021年第5期40卷 819-845页

作者： Gehad.M.Saleh bahaa.M.Emad ibrahim.b.abdel kader Rania.M.Sakr Nuclear Materials Authority El MaadiP.O.Box 530CairoEgypt

The present work deals with the detailed geology,mineralogy,geochemistry,and spectrometric prospection of the felsic volcanic rocks at the Eastern Desert,Egypt of the Arabian-Nubian *** volcanic rocks are an essential source for rare earth elements(REEs)and uranium occurrences in this *** are compositionally uniform with tholeiitic to calc-alkaline affinities,peraluminous and belong to the series of rhyolite with high-K *** exhibit more enrichment in high field strength elements(HFSE,***,Ta,Nd,Th,and U)and large-ion lithophile elements(LILE,*** and Rb)compared to the country rocks of the studied area,with REE ranging from 188.20 to 442.70 ppm and strong depletion in Ti,Sr,P with deep negative Eu *** felsic volcanic rocks were mostly generated from the partial melting of quartz-amphibolite facies accreted during the *** oddities of Zr-U-Th for the felsic volcanic rocks determine the involvement of crustal *** volcanic rocks are found in A-type suites of magma and represent highly fractionated rocks derived from rhyolitic magma,with insignificant interaction with continental crust in the low-pressure environment and during fractional *** volcanic rocks have higher values of radioactivity in which eU range from 0.5 to 121 ppm and eTh from 1.0 to 415.10 *** high values of eU and eTh can be ascribed to the mineralization of uranium and the presence of accessory minerals of radiogenic nature such as uranophane,uranothorite,zircon,and *** is considered as the mineral with most enriched uranium contents in the studied felsic volcanic rocks in which(UO2=87.30 wt%).Also,they are enriched with REE-bearing accessory minerals comprising allanite,titanite,and *** geological investigations of the felsic volcanic rocks in the studied areas are inappropriate to clear the feasible economic potentialities of rare earth elements and U occurrences;itemized and invaluable

关键词： Felsic volcanic rocks Geochemistry REE Uranium mineralization Egypt Arabian-Nubian Shield

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Geochemistry and spectrometric prospection of younger granites and granitic pegmatites bearing uranium mineralization at *** El Rakeb area, Central Eastern Desert, Egypt

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Acta Geochimica 2021年第4期40卷 575-601页

作者： Gehad M.Saleh bahaa M.Emad ibrahim.b.abdel kader Nuclear Materials Authority El MaadiP.O.Box 530CairoEgypt

The present study deals with the detailed field geology,mineralogy,geochemistry,and spectrometric prospection of rare metals and radioactive minerals associated with granitic pegmatites in the Gabal Um LassafAbu Dob-Um Atelia-Kadabora-Kab El Rakeb area(LDAKK),which are situated in the central Eastern Desert of *** study area is composed of granodiorites and *** latter is dissected by granitic pegmatites with a discriminatory distribution of economically important mineralization(rare-metals and U-Th minerals).The granitic pegmatites display a zoning structure composed of feldspar-rich zones enveloping pockets of mica(mostly muscovite) and all zoning internal quartz ***,the monzogranite and granitic pegmatites are composed of potash-feldspar,albite,and quartz with a small amount of biotite and *** mineralogical investigation of the highly radioactive zones in the granitic pegmatite shows enrichment in kasolite,uranothorite,thorite,xenotime,columbite,zircon,bismuth,and ***,the granitic pegmatites are enriched with high field strength elements(HFSE;Zr,Nb,Th,and U) and ion lithophilic elements(LILE;Rb,and Pb) and depleted in ba,Sr,and *** are strongly peralkaline to metalumainous except for two samples,which are *** are formed by partial melting of metagreywackes at *** studied granitic pegmatites could belong to the NYF family(Niobium-Yttrium-Fluorine family) according to the geochemistry of the trace *** studied granitic pegmatites show deep negative Eu anomaly and display a strong M-type tetrad effect of rare earth *** field spectroscopy measurements showed the localization of the radiometric anomalous associated with the granitic pegmatites,which are intruded in the granitic host *** eU and eTh contents reached up to 316 and 1367 ppm,*** and thorium occurrences in the investigated granitic pegmatites are related to magmatic(syngenetic)ori

关键词： Geochemistry Gabal Um Lassaf-Abu Dob-Um Atelia-Kadabora-Kab El Rakeb area(LDAKK) Uranium REE Egypt

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Lipid Production,Oxidative Status,Antioxidant Enzymes and Photosynthetic Efficiency of Coccomyxa chodatii SAG 216-2 in Response to Calcium Oxide Nanoparticles

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Phyton-International Journal of Experimental botany 2023年第7期92卷 1955-1974页

作者： Huwida A.A.abdel-kader Naeima Yousef Mohammad Anwar Hossain Mona F.A.Dawood Department of botany&Microbiology Faculty of ScienceAssiut UniversityAssiut71516Egypt Department of Genetics and Plant breeding Bangladesh Agricultural UniversityMymensingh2202Bangladesh

The extensive use of nanoparticles(NPs)in diverse applications causes their localization to aquatic habitats,affecting the metabolic products of primary producers in aquatic ecosystems,such as *** calcium oxide nanoparticles(CaO NPs)are of the scarcely studied ***,the current work proposed that the exposure to CaO NPs may instigate metabolic pathway to be higher than that of normally growing algae,and positively stimulate algal *** this respect,this research was undertaken to study the exposure effect of CaO NPs(0,20,40,60,80,and 100μg mL^(−1))on the growth,photosynthesis,respiration,oxidative stress,antioxidants,and lipid production of the microalga Coccomyxa chodatii SAG *** results showed that the algal growth concomitant with chlorophyll content,photosynthesis,and calcium content increased in response to CaO *** contents of biomolecules such as proteins,amino acids,and carbohydrates were also promoted by CaO NPs with variant ***,lipid production was enhanced by the applied *** NPs induced the accumulation of hydrogen peroxide,while lipid peroxidation was reduced,revealing no oxidative behavior of the applied nanoparticles on ***,CaO NPs have a triggering effect on the antioxidant enzymes such as superoxide dismutase,catalase,ascorbate peroxidase,and guaiacol *** results recommended the importance of the level of 60μg mL^(−1) CaO NPs on lipid production(with increasing percentage of 65%compared to control)and the highest dry matter acquisition of *** study recommended the feasibility of an integrated treatment strategy of CaO NPs in augmenting biomass,metabolic up-regulations,and lipid accumulation in ***.

关键词： Calcium oxide nanoparticles Coccomyxa chodatii growth hydrogen peroxide metabolic products

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A pilot study using lactulose in management of minimal hepatic encephalopathy in children with extrahepatic portal vein obstruction

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World Journal of Pediatrics 2017年第1期13卷 70-75页

作者： Hanaa Mostafa El-Karaksy Omneya Afifi Azza bakry Ann abdel kader Noha Saber Department of Pediatrics Kasr Alainy School of MedicineCairo UniversityEgypt Department of Psychiatry Kasr Alainy School of MedicineCairo UniversityEgypt Department of Neurophysiology Kasr Alainy School of MedicineCairo UniversityEgypt

background:Minimal hepatic encephalopathy(MHE)is not associated with overt neuropsychiatric symptoms but rather with subtle changes in psychometric and/or neurOphysiolOgic *** aimed to diagnose MHE in children with extrahepatic portal vein obstruction fEHPV01 and to evaluate the el№ct of lactulose on ***:A prospective study was carried out on 30 patients with EHPVO(21 males;mean age 10+2.5 years).The study was carried out in the Pediatric Hepatology *** University Pediatric Hospital,Cairo,Egypt,between 2011 and *** patients were subjected to clinical and Iaboratory *** testin2 using the arabic version of Wechsler intelligence *** testing by visual electroencephalogram and P300 event related potentials(ERP).

关键词： children extrahepatic portal vein obstruction lactulose minimal hepatic encephalopathy neuropsychometric tests P300 event-related potential

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First record of Lepidoderma carestianum and Arthrinium bambusicola from Egypt

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Studies in Fungi 2022年第1期7卷 79-84页

作者： Samah Abd Al-kader El-Debaiky Yehia abdel-Galele Mahmoud Mycology Research Lab. Botany DepartmentFaculty of ScienceTanta UniversityTanta 31527Egypt

This study introduces two new protozoan and fungal species for the first time to the Egyptian *** first one is myxomycetous,Lepidoderma carestianum and the second is the ascomycetous;Arthrinium *** sporocarp of *** was discovered attached to the soil surface while,*** was found growing saprophytically on the dead branch of a *** specimens were transferred to the laboratory to be cultivated as pure cultures and subjected to identification process;morphologically and genetically.

关键词： soil cultivated environment

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General exact solution of the fin problem with variable thermal conductivity

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Propulsion and Power Research 2016年第1期5卷 63-69页

作者： Abass H.abdel kader Mohamed S.abdel Latif Hamed M.Nour Engineering Mathematics and Physics Department Faculty of EngineeringMansoura UniversityMansoura 35516Egypt

In this paper,Lie point symmetry method is used to obtain the general exact solution of the second order nonlinear ordinary differential equation which goveming heat transfer in rectangular fin with variable thermal *** new forms of thermal conductivity are introduced and the associated exact solution is obtained in each *** general relation among the fin efficiency,thermal conductivity and thermo-geometric parameter is obtained.

关键词： Exact solution Fin Thermal conductivity Heat transfer Lie point symmetry

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Comparative characterization and osteogenic/adipogenic differentiation of mesenchymal stem cells derived from male rat hair follicles and bone marrow

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Cell Regeneration 2020年第1期9卷 130-143页

作者： abdel kader A.Zaki Tariq I.Almundarij Faten A.M.Abo-Aziza Department of Veterinary Medicine College of Agriculture and Veterinary MedicineQassim UniversityBuraydahSaudi Arabia Department of Physiology Faculty of Veterinary MedicineCairo UniversityGizaEgypt Department of Parasitology and Animal Diseases Veterinary Research DivisionNational Research CentreCairoEgypt

Clinical applications of cell therapy and tissue regeneration under different conditions need a multiplicity of adult stem cell *** to date,little is available on the comparative isolation,characterization,proliferation,rapid amplification,and osteogenic/adipogenic differentiation of rat mesenchymal stem cells(MSCs)isolated from living bulge cells of the hair follicle(HF)and bone marrow(bM)from the same *** work hopes to use HF-MSCs as an additional adult stem cell source for research and *** reaching 80%confluence,the cell counting,viability%,and yields of HF-MSCs and bM-MSCs were nearly *** viability%was 91.41±2.98 and 93.11±3.06 while the cells yield of initial seeding was 33.15±2.76 and 34.22±3.99 and of second passage was 28.76±1.01 and 29.56±3.11 for HF-MSCs and bM-MSCs *** of differentiation(CDs)analysis revealed that HF-MSCs were positively expressed CD34,CD73 and CD200 and negatively expressed ***-MSCs were positively expressed CD73 and CD200 and negatively expressed of CD34 and *** proliferation of HFMSCs and bM-MSCs was determined by means of incorporation of brd-U,population doubling time(PDT)assays and the quantity of formazan *** percentage of brd-U positive cells and PDT were relatively similar in both types of *** proliferation,as expressed by the quantity of formazan assay in confluent cells,revealed that the quantity of release by bM-MSCs was slightly higher than *** differentiated bM-MSCs showed moderate accumulation of oil red-O stained lipid droplets when compared to that of HF-MSCs which exhibited high *** total lipid concentration was significantly higher in adipogenic differentiated HF-MSCs than bMMSCs(Pbone alkaline phosphatase and calcium concentration were significantly higher(PbM-MSCs than that of *** present findings demonstrate that the

关键词： Stem cell bone marrow Hair follicle Osteogenesis Adipogenesis

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Experimental validation of double-fed induction generator in oscillating water column using circulatory system-based optimization

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Clean Energy 2024年第2期8卷 127-143页

作者： basem E.Elnaghi Ahmed M.Ismaiel Fathy El Sayed abdel-kader Reham H.Mohammed M.N.Abelwhab Electrical Power and Machine Department Suez Canal UniversityIsmailiaEgypt Electrical Power and Machine Department Menoufia UniversityMenoufiaEgypt Computer and Control Department Suez Canal UniversityIsmailiaEgypt

This paper validates the optimal operation for a grid-connected double-fed induction generator(DFIG)in an oscillating water column power plant(OWCPP).This study presents a novel optimization technique called the circulatory system-based optimization(CSbO)approach to develop six adaptive fuzzy logic controllers(AFLCs)with 30 parameters and compare them to chaotic-billiards optimization(C-bO)and genetic algorithm(GA).The proposed controller is also compared with a proportional-integral differential(PID)controller based on a self-adaptive global-best harmony search(SGHS).CSbO-based AFLCs are fully investigated under different scenarios and experimented with using a real-time interface *** results of using CSbO-AFLCs revealed a fast time response,fast convergence,less overshoot and minimal error compared with those achieved with C-bO-AFLC,SGHS-PID and GA-AFLC during different case *** CSbO-based AFLCs ensure maximum power from the DFIG in an OWCPP and enhance dynamic response with very low *** results show that the CSbO shows better power tracking by 25%as compared with C-bO,by 45%when compared with the GA and by 56%when compared with ***,the integral absolute errors of six controllers are investigated to demonstrate the feasibility of *** root mean square of the errors of six controllers using CSbO is improved by 68.27%when compared with GA,by 22.57%when compared with C-bO and by 38.42%when compared with *** indicators demonstrate the feasibility of CSbO when compared with other algorithms with the same OWCPP.

关键词： circulatory system-based optimization approach adaptive fuzzy logic controller grid-tied oscillating water column power plant maximum power point tracking

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Electron Spin Resonance of FeCl_3-filled Polyvinylidene Fluoride

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Journal of Materials Science & Technology 1997年第3期13卷 194-198页

作者： A.Tawansi H.I.abdel-kader and E.M.abdel-Razek(Dept. of Physics, Faculty of Science, Mansoura University, 35516, Egypt)M I Ayad(Dept. of Chemistry Almonofeya University, Shebeen E1-Koam, Egypt) Dept. of Physics Faculty of Science Mansoura University Egypt Dept. of Chemistry Almonofeya University Shebeen El-Koam Egypt

Electron spin resonance (ESR) measurements were carried out at room temperature (=294 K),for FeCl3-filled polyvinylidene fluoride (PVDF) films, over the filling mass fraction range of 0 详细信息

Electron spin resonance (ESR) measurements were carried out at room temperature (=294 K),for FeCl3-filled polyvinylidene fluoride (PVDF) films, over the filling mass fraction range of 0by casting method. The ESR spectrum of the unfilledPVDF was complex, due to the hyperfine interactions. arisen from the free radicals. For PVDF filled with FeCl3 nearly Symmetric Lorentzian ESR signals, without hyperfine spectra, were found around g=1.92. This is attributed to the superexchange magnetic interactions among the symmetrical octahedrally coordinated Fe3+ ions. The effect of the filling level on the following ESR parameters are discussed: signal asymmetry line width, g-factor, relaxation time, spin (and orbital) magnetic moment, number of unpaired electrons per Fe ion and density of spin electrons.

关键词： Figure Spin

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Optical diagnosis of colorectal polyps using convolutional neural networks

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World Journal of Gastroenterology 2021年第35期27卷 5908-5918页

作者： Rawen kader Andreas V Hadjinicolaou Fanourios Georgiades Danail Stoyanov Laurence b Lovat Wellcome/EPSRC Centre for Interventional and Surgical Sciences University College LondonLondon W1W 7TYUnited Kingdom Division of Surgery and Interventional Sciences University College LondonLondon W1W 7TYUnited Kingdom MRC Cancer Unit Department of GastroenterologyUniversity of CambridgeCambridge CB20QQUnited Kingdom Department of Surgery University of CambridgeCambridge CB20QQUnited Kingdom Department of Computer Science University College LondonLondon W1W 7TYUnited Kingdom

Colonoscopy remains the gold standard investigation for colorectal cancer screening as it offers the opportunity to both detect and resect pre-malignant and neoplastic *** technologies for image-enhanced endoscopy are widely available,optical diagnosis has not been incorporated into routine clinical practice,mainly due to significant inter-operator *** recent years,there has been a growing number of studies demonstrating the potential of convolutional neural networks(CNN)to enhance optical diagnosis of *** suggest that the use of CNNs might mitigate the inter-operator variability amongst endoscopists,potentially enabling a“resect and discard”or“leave in”strategy to be adopted in *** would have significant financial benefits for healthcare systems,avoid unnecessary polypectomies of non-neoplastic polyps and improve the efficiency of ***,we review advances in CNN for the optical diagnosis of colorectal polyps,current limitations and future directions.

关键词： Artificial intelligence Deep learning Convolutional neural networks Computer aided diagnosis Optical diagnosis Colorectal polyps

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