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Erratum to “Indium doping effect on properties of ZnO nanoparticles synthesized by sol-gel method”

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Chinese Physics B 2020年第3期29卷 496-496页

作者： S Mourad j el ghoul K Omri K Khirouni Laboratory of Physics of Materials and Nanomaterials Applied at Environment(LaPhyMNE) Faculty of Sciences in GabesGabes University6072 GabesTunisia Imam Mohammad Ibn Saud Islamic University(IMSIU) College of SciencesDepartment of PhysicsRiyadh 11623Saudi Arabia

Figure 2 in our original paper [Chin. Phys. B 28 047701(2019)] was downloaded by default. We present the correct figure in this erratum.

关键词： In-doped ZnO nanoparticles sol-gel process structural and optical characterization

Searching for a Target Whose Truncated Brownian Motion

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Applied Mathematics 2017年第6期8卷 786-798页

作者： Abd elmoneim A. Teamah Mohamed A. el-Hadidy Marwa M. el-ghoul Department of Mathematics Faculty of Science Tanta University Tanta Egypt

This paper presents search model for a randomly moving target which follows truncated Brownian motion. The conditions that make the expected value of the first meeting time between the searcher and the target is finit... 详细信息

关键词： Search Plan Truncated Brownian Motion Expected Value First Meeting Time

Experimental Study on Deoxidization of Bariumand Barium Alloy

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journal of Materials Science & Technology 1999年第5期15卷 400-404页

作者： Shi, YF Chen, BP Fu, j el Gammal, T Univ Sci & Technol Beijing Met Sch Beijing 100083 Peoples R China Rhein Westfal TH Aachen Inst Eisenhuttenkunde Aachen Germany

Based on the review of latest papers related to the application of barium alloy, the deoxidization effects of barium and barium alloy, and the dynamic characteristics of molten bath have been systematically studied by means of the convection free bath, natural convection bath, air and vacuum induction melting experiments. It was found that both the total oxygen content and soluble oxygen content in molten bath decreased rapidly. The results obtained provided practical and theoretical basis for further synthetic applications of barium alloy in metallurgical industry.

关键词： Barium

Determination and assessment of total mercury levels in local, frozen and canned fish in Lebanon

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journal of Environmental Sciences 2011年第9期23卷 1564-1569页

作者： Pierre j Obeid Bilal el-Khoury joanne Burger Samer Aouad Mira Younis Amal Aoun john Hanna el-Nakat University of Balamand Faculty of SciencesDepartment of Chemistry Nelson Biological Laboratory Division of Life SciencesRutgers University

Fish is an important constituent of the Lebanese ***,very little attention in our area is given to bring awareness regarding the effect of the toxicity of mercury （Hg） mainly through fish *** study aimed to report analytical data on total mercury levels in several fish species for the first time in thirty years and to also made individuals aware of the presence and danger from exposure to mercury through fish *** samples were selected from local Lebanese markets and fisheries and included 94 samples of which were fresh,frozen,processed,and canned *** values were reported as microgram of mercury per gram of fish based on wet *** level of mercury ranged from 0.0190 to 0.5700 μg/g in fresh samples,0.0059 to 0.0665 μg/g in frozen samples,and 0.0305 to 0.1190 μg/g in canned *** data clearly showed that higher levels of mercury were detected in local fresh fish as opposed to other types thus placing consumers at higher risk from mercury ***,the data revealed that Mallifa （yellowstripe barracuda/Sphyraena chrysotaenia）,Sargous （white seabream/Diplodus sargus）,Ghobbos （bogue/Boops boops）,and shrimp （Penaeus sp.） were among the types containing the highest amounts of *** the other hand,processed fish such as fish fillet,fish burger,small shrimp and crab are found to contain lower levels of mercury and are associated with lower exposure risks to *** population should therefore,be aware to consume limited amounts of fresh local fish to minimize exposure to mercury.

关键词： total mercury fish Lebanon

On the Set of Grouplikes of a Coring

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Acta Mathematica Sinica,English Series 2012年第1期28卷 195-204页

作者： L.el KAOUTIT j.GóMEZ-TORRECILLAS Departamento de lgebra.Facultad de Educación y Humanidades Universidad de GranadaEl Greco No 10E-51002 CeutaEspaa Departamento de lgebra.Facultad de Ciencias Universidad de GranadaE18071 GranadaEspaa

We focus our attention to the set Gr（ξ） of grouplike elements of a coring ξover a ring A. We do some observations on the actions of the groups U（A） and Aut（ξ~） of units of A and of automorphisms of corings of ξ, respectively, on Gr（ξ）, and on the subset Gal（ξ）of all Galois grouplike elements. Among them, we give conditions on ξ under which Gal（ξ） is a group, in such a way that there is an exact sequence of groups el → U（Ag） → U（A） → Gal（ξ） → el, where Ag is the subalgebra of coinvaxiants for some g ∈ Gal（ξ）.

关键词： Galois corings division ring extensions non-abelian cohomology

Influence of manganese rate on structural, optical and electrochemical properties of CeO_(2) thin films deposited by spray pyrolysis:Supercapacitor applications

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journal of Rare Earths 2022年第10期40卷 1611-1618页

作者： j.Zimou K.Nouneh A.Talbi L.el Gana A.el-Habib R.Hsissou M.Addou Laboratory of Materials Physics and Subatomic Department of PhysicsFaculty of ScienceIbn Tofail UniversityBP 13314000KenitraMoroco Thin Film and Nanomaterial Research Team Faculty of Science and TechiquesAbdelmalek Essadi UniversityTangerMorocco Laboratory of Organic Chemistry Catalysis and EnvironmentFaculty of SciencesIbn Tofail UniversityBP 24214000KenitraMorocco

The present work aimed to investigate the electrochemical properties of ITO substrates in propylene carbonate(PC) with 0.5 mol/L lithium perchlorate(LiClO_(4)) medium in the presence of elaborated thin films of cerium dioxide pure and doped with manganese at varying ***_(1-x)Mn_(x)O_(2)(x=0 wt%,2 wt%,4 wt% and 6 wt%) were successfully deposited by the spray pyrolysis(SP) technique on the glass substrate and ITO at 450℃.The effects of manganese(Mn) doped thin films Ce_(1-x)Mn_(x)O_(2) were studied and investigated by using different analyses namely X-ray diffraction(XRD) analysis,Raman spectroscopy method,UV-Vis spectrophotometer technique,atomic force microscopy(AFM) analysis and electrochemical *** data obtained present a polycrystalline with a face-centred cubic structure of fluorite *** results of undoped and Mn doped thin films show two peaks at 465 and 600 cm^(-1),due to the formation of extrinsic oxygen vacancies by the incorporation of Mn into Ce1-xMnxO_(2) *** dispersive spectroscopy(EDS) data show the presence of Ce,O,and Mn elements in the elaborated *** AFM results reveal that the surface roughness decreases with increasing Mn ***,band gap energy of thin films decreases with increasing in Mn rate due to the formation of defect state between valence and conduction *** storage capacity of the elaborated Ce_(1-x)Mn_(x)O_(2)/ITO/PC+LiClO_(4) electrode reaches a maximum of 1.997 mF in the presence of 6 wt% of Mn.

关键词： Ce1-xMnxO_(2)thin films electrochemical properties ITO substrates XRD/UV-Vis/AFM Band gap energy Storage capacity

Effect of different metal sulfate precursors on structural and catalytic performance of zirconia in dehydration of methanol to dimethyl ether

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燃料化学学报 2018年第1期46卷 67-74页

作者： Abd el-Aziz A.Said Mohamed Abd el-Aal Chemistry Department Faculty of ScienceAssiut University71516 AssiutEgypt

ZrO_2 was treated with 10% SO_4^(2-) from different metal sulfate precursors for methanol dehydration to dimethyl *** the samples exhibited tetragonal phase and no diffraction peaks corresponding to metal sulfates or metal oxides were *** FT-IR results revealed that there were different interactions between sulfate and ZrO_2,and this had a great effect on the surface area of the *** catalytic activity was measured over the catalysts in the temperature range of 100-300 ℃.The results revealed that sulfated zirconia with CuSO_4·5 H_2O and Al_2(SO_4)_3·16 H_2O showed the best catalytic *** maximum yield of DME ≈87% was obtained over CuSZ at a reaction temperature of 275 ℃.Moreover,the catalytic activity of the catalysts was correlated well with their surface acidity that measured by dehydration of isopropanol.

关键词： MSO 4/ZrO2 甲醇脱水 DME

Thermal explosion of a reactive gas mixture at constant pressure for non-uniform and uniform temperature systems

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Defence Technology（防务技术） 2022年第10期18卷 1842-1851页

作者： Saad A.el-Sayed Mechanical Power Engineering Dept.Zagazig University ZagazigAlshrkiaEgypt

In this study,the approximate and exact solutions for the stationary-state of the solids model with neglecting reactant consumption for both non-uniform and uniform temperature systems were applied on gas ignition under a constant pressure *** criticality conditions for a slab,an infinite cylinder,and a sphere are determined and discussed using dimensionless temperatures under constant ambient and surface temperatures for a non-uniform temperature *** solution for a Semenov model with convection heat loss was also *** solution of the Semenov problem for constant volume or density as a solid and constant pressure were *** critical parameterδis calculated and compared with those of Frank-Kamenetskii solution *** validation of the calculated ignition temperatures with other exact solution and experimental results were *** relation between critical parameters form Semenov and *** solution was introduced.

关键词： Thermal explosion Approximate solution Critical conditions Distributed and uniform temperature systems

Intercalation and Stability of Layered Semiconductive Material in Corrosive Environment

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journal of Materials Science & Technology 2006年第2期22卷 252-256页

作者： A.A.el-Meligi electrochem.and Corrosion Lab. Physical Chemistry Dept. National Research CentreDokkiCairoEgypt

The intercalation of 4-methyl pyridine （4-picoline） into layered semiconductive material （MnPS3） and the stability of the resulting materials in corrosive environments （water, HCI and open atmosphere） were investigated. Powder X-ray diffraction （XRD） indicated that the presence of water and hydrochloric acid greatly influenced the existing form of intercalation and its orientation in the interlayer of the host. Atmospheric environment （open air） affected the guest orientation in the interlayer of the host material. Phase transformation occurred and the material was stable. The intercalated compounds could be indexed in the trigonal unit cell. The XRD patterns exhibited sharp hkl reflections of the intercalated compounds, which formed in water and HCI, confirming that the materials were well crystalline and stable in corrosive environments.

关键词： MnPS3 Intercalation Stability XRD Corrosive environments