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| 1 | Effect of RF power on the structural and optical properties of ZnS thin films prepared by RF-sputtering显示文摘Zinc sulphide(ZnS) thin films have grown on glass and Si substrates by reactive cathodic radio frequency(RF) sputtering. The RF power was varied in the range of 100 to 250 W, while the deposition time is set at75 min. The optical, structural, and morphological properties of these thin films have been studied. The optical properties(mainly thickness, refractive index,absorption coefficient, and optical band gap) were investigated by optical transmittance measurements in the wavelength range of ultraviolet-visible-near infrared spectroscopy and spectroscopy infrared with Fourier transform. Fourier(FT-IR) and XRD analysis indicated that all sputtering ZnS films had a single-phase with a preferred orientation along the(111) plane of the zinc sphalerite phase(ZB). The crystallite size ranged from 11.5 to 48.5 nm with RF power getting a maximum of 200 W. UV-visible measurements exhibited that the ZnS film had more than 80% transmission in the visible wavelength region. In addition, it has been observed that the band gap energy of ZnS films is decreased slightly from 3.52 to 3.29 eV, and as the RF power is increased, the film thickness increases with the speed of deposit growth. Scanning electron microscopy observations revealed the types of smooth-surfaced films. The measurements(FT-IR) revealed at wave number1118 and 465.02 cm^(-1) absorption bands corresponding to the symmetrical and asymmetric vibration of the Zn-S stretching mode. X-ray reflectometry measurements of ZnS films have shown that the density of the films is(3.9 g/cm^3) close to that of solid ZnS. | C.M.Samba Vall M.Chaik H.Ait Dads H.El Aakib M.Elyaagoubi M.Aggour A.Outzourhit | 2018 | Journal of Semiconductors2018，39，12： | 2 |
| 2 | Numerical Study of Greenhouse Nocturnal Heat Losses显示文摘In this study we quantify and analyze different components of nocturnal losses from a heated greenhouse with the presence of vegetation for typical winter weather conditions in Marrakesh-Morocco,using a non linear model,based on the greenhouse heat and mass balance.It was found that 12% of the total input heat was dissipate as a sensible and latent leakage losses,66% was lost by convective exchange through air-inner cover.This gain of energy at the inner-cover is dissipated at the outer-cover by radiation(66%)and convection(34%).This results point toward some practical measures to reduce heat losses:increasing air tightness,using covering materials with low-emissivity in the long wave band or putting up an external thermal curtain should provide significant energy savings. | F.Berroug E.K.Lakhal M.El Omari M.Faraji H.El Qarnia | 2011 | Journal of Thermal Science2011，20，4： | 2 |
| 3 | The role of bone marrow‐derived mesenchymal stem cells in treating formocresol induced oral ulcers in dogs显示文摘 | H.El‐Menoufy L. A. A.Aly M. T. A.Aziz H. M.Atta N. K.Roshdy L. A.Rashed D.Sabry | 2010 | Journal of Oral Pathology & Medicine2010，，4： | 1 |
| 4 | Combining strains of lactic acid bacteria may reduce their toxin and heavy metal removal efficiency from aqueous solution显示文摘 | T.Halttunen M.C.Collado H.El‐Nezami J.Meriluoto S.Salminen | 2007 | Letters in Applied Microbiology2007，，2： | 1 |
| 5 | Nanofibrous ε-polycaprolactone scaffolds containing Ag-doped magnetite nanoparticles: Physicochemical characterization and biological testing for wound dressing applications in vitro and in vivo显示文摘Skin wounds can lead to numerous complications with dangerous health consequences.In this work,magnetite nanoparticles were doped with different concentrations of antimicrobial silver(Ag)ions and incorporated into the electrospun nanofibrous ε-polycaprolactone(PCL)scaffolds.Nanoparticles and scaffolds with various Ag contents were characterized using a range of physicochemical techniques.Ag entered magnetite as cations and preferentially positioned at tetrahedral sites,introducing lattice distortions and topographic irregularities.Amorphization 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 detected.Promoting spin canting and diminishing the double exchange interaction through altered distribution of ferric and ferrous ions,Ag softened the magnetism of magnetite.By 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 growth.Both the viability of human melanocytes and the antibacterial activity against E.coli and S.aureus increased with the concentration of Ag in the magnetite phase of the scaffolds.Skin 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 group.These results imply an excellent potential of these composite nanofibrous scaffolds for use as wound dressings and in other reconstructive skin therapies. | M.K.Ahmed M.A.Zayed S.I.El-dek Mayssa Abdel Hady Doaa H.El Sherbiny Vuk Uskokovic | 2021 | Bioactive Materials2021，6，7： | 1 |
| 6 | Systematic review: persistent reflux symptoms on proton pump inhibitor therapy in primary care and community studies显示文摘 | H.El‐Serag A.Becher R.Jones | 2010 | Alimentary Pharmacology & Therapeutics2010，，： | 1 |
| 7 | Preparation and characterization of polyamide‐leather wastes polymer composites显示文摘 | O. A.Mohamed N. H.El Sayed A. A.Abdelhakim | 2010 | J Appl Polym Sci2010，，1： | 1 |
| 8 | Assessment of dead layers thickness of an HPGe detector after an extended operating period using response surface methodology and Box–Behnken design显示文摘Purpose This work aims to study the increase in dead layer thickness of an HPGe N-type detector during its operational period from 2012 to 2018.Methods The dead layer was examined along three Ge-crystal surfaces,such as outer frontal,outer lateral,and inner lateral.These parameters were optimized using response surface methodology(RSM)with a Box–Behnken design(BBD).The Monte Carlo calculations using the GAMOS(Geant4-based Architecture for Medicine-Oriented Simulations)code were performed to evaluate the detector’s efficiency at different values of the inactive germanium layer.Results and conclusion The optimal combination of dead layer thickness has been identified using the desirability function approach,which is a useful tool to optimize multi-response problems.To find the variation in dead layer thickness over the operational period,the optimization procedure was reiterated for both experimental efficiencies measured in 2012 and 2018.The obtained results show that dead layers thickness has increased from 0.6141 mm to 0.7447 mm,0.0803 mm to 2.2721 mm,and 1.5012 mm to 1.6091 mm for the outer frontal,outer lateral,and inner lateral surfaces,respectively. | A.Arectout H.Boukhal E.Chham E.Chakir F.Piñero-García M.Azahra H.El Yaakoubi K.Laazouzi T.El Ghalbzouri M.Assalmi | 2023 | Radiation Detection Technology and Methods2023，7，4： | 0 |
| 9 | Special Mappings with Central Values on Prime Rings显示文摘In this paper we investigate commutativity of prime rings with involution*of the second kind in which endomorphisms satisfy certain algebraic identities.Furthermore,we provide examples to show that the various restrictions imposed by the hypo theses of our theorems are not superfluous. | H.El Mir A.Mamouni L.Oukhtite | 2020 | Algebra Colloquium2020，27，3： | 0 |
| 10 | The Thermodynamical Behaviors of Kerr–Newman AdS Black Holes显示文摘We reconsider the study of critical behaviors of Kerr—Newman Anti-de Sitter(AdS)black holes in four dimensions.The study is made in terms of the moduli space parameterized by the charge Q and the rotation parameter a,relating the mass M of the black hole and its angular momentum J via the relation a=J/M.Specifically,we discuss such thermodynamical behaviors in the presence of a positive cosmological constant considered as a thermodynamic pressure and its conjugate quantity as a thermodynamic volume.The equation of state for a charged Reissner—Nordstrom AdS black hole predicts a critical universal number depending on the(Q,a)moduli space.In the vanishing limit of the a parameter,this prediction recovers the usual universal number in four dimensions.Then,we find the bounded region of the moduli space allowing the consistency of the model with real thermodynamical variables. | A.Belhaj M.Chabab H.El Moumni L.Medari M.B.Sedra | 2013 | Chinese Physics Letters2013，30，9： | 0 |
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