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材料科学与工程（中英文B版） 2013年第8期3卷 530-534页

作者： moustafa Aziz Mohga Hassan Nuclear and Radiological Regulatory Authority Nasr City Cairo 11762 Egypt

Synthesis, in vitro antitumor activity and molecular modeling studies of a new series of benzothiazole Schiff bases

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Chinese Chemical Letters 2016年第3期27卷 380-386页

作者： moustafa T.Gabr Nadia S.El-Gohary Eman R.El-Bendary Mohamed M.El-Kerdawy Nanting Ni Department of Medicinal Chemistry Faculty of Pharmacy Mansoura University Mansoura 35516 Egypt Department of Chemistry Ceorgia State University Atlanta CA 30303 USA

A new series of benzothiazole Schiff bases 3–29 was synthesized and screened for antitumor activity against cervical cancer（Hela） and kidney fibroblast cancer（COS-7） cell lines. Results indicated that compounds 3, 14, 19, 27 and 28 have promising activity against Hela cell line with IC50 values of 2.41,3.06, 6.46, 2.22 and 6.25 mmol/L, respectively, in comparison to doxorubicin as a reference antitumor agent（IC50 2.05 mmol/L）. In addition, compound 3 displayed excellent activity against COS-7 cell line with IC50 value of 4.31 mmol/L in comparison to doxorubicin（IC50 3.04 mmol/L）. In the present work,structure based pharmacophore mapping, molecular docking, protein-ligand interaction, fingerprints and binding energy calculations were employed in a virtual screening strategy to identify the interaction between the compounds and the active site of the putative target, EGFR tyrosine kinase. Molecular properties, toxicity, drug-likeness, and drug score profiles of compounds 3, 14, 19, 27, 28 and 29 were also assessed.

关键词： Benzothiazole Schiff bases Antitumor activity Molecular modeling In silico studies

Secure and Robust Optical Multi-Stage Medical Image Cryptosystem

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Computers, Materials & Continua 2022年第1期70卷 895-913页

作者： Walid El-Shafai moustafa H.Aly Abeer D.Algarni Fathi E.Abd El-Samie Naglaa F.Soliman Department Electronics and Electrical Communications Faculty of Electronic EngineeringMenoufia UniversityMenouf32952Egypt Department of Electronics and Communications Engineering College of Engineering and TechnologyArab Academy for ScienceTechnology and Maritime TransportAlexandria1029Egypt Department of Information Technology College of Computer and Information SciencesPrincess Nourah Bint Abdulrahman UniversityRiyadh84428Saudi Arabia Department of Electronics and Communications Faculty of EngineeringZagazig UniversityZagazig44519Egypt

Due to the rapid growth of telemedicine and healthcare services,color medical image security applications have been expanded *** this paper,an asymmetric PTFrFT(Phase Truncated Fractional Fourier Transform)-based color medical image cryptosystem is *** different phases in the fractional Fourier and output planes are provided as deciphering ***,the ciphering keys will not be employed for the deciphering ***,the introduced PTFrFT algorithm comprises asymmetric ciphering and deciphering processes in contrast to the traditional optical symmetric OSH(Optical Scanning Holography)and DRPE(Double Random Phase Encoding)*** of the principal impacts of the introduced asymmetric cryptosystem is that it eliminates the onedimensionality aspects of the related symmetric cryptosystems due to its remarkable feature of phase nonlinear truncation *** comparisons on various colormedical images are examined and analyzed to substantiate the cryptosystem *** achieved experimental outcomes ensure that the introduced cryptosystem is robust and *** has terrific cryptography performance compared to conventional cryptography algorithms,even in the presence of noise and severe channel attacks.

关键词： Optical encryption medical image security symmetric and asymmetric encryption OSH DRPE PTFrFT

Simple identification approach for trace heteroatom-containing compounds in petroleum fraction by Automated Mass Spectral Deconvolution and Identification System

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色谱 2016年第9期34卷 925-932页

作者： moustafa Nagy E Mahmoud Kout El-Kloub Fars Institute of Inorganic and Analytical Chemistry University of Munster Germany Munster 48149 Department of Chemistry Women's College for Arts Science and Education Ain Shams University Egypt Cairo 11566

Here we present a simple yet effective gas chromatography-mass spectrometry (GC-MS) identification approach for the detection of heteroatom-containing compounds (HACCs) in petroleum fractions. The MS/AMDIS (Automated Mass Spectral Deconvolution and Identification System) program was used to identify parts per million (ppm) HACC concentrations in petroleum fractions in place of traditional techniques (extraction and standard injection). Polycyclic aromatic sulfur heterocycles (S-PAHs) were used as model compounds to confirm the validity of the AMDIS identifiers, which were compared with extracted results using the off-line X-calibur software. AMDIS was able to identify ppm concentrations of S-PAHs in oil condensate. There was good agreement between experimental and AMDIS identification results for S-PAHs in oil condensate. AMDIS was also used to detect nitrogen-containing compounds (NCCs) and alkylphenols in oil condensate. Our results confirmed the presence of 2-methylbenzothiazole, carbazole, and 2,4-ditertbutyl phenol. In a crude oil sample, AMDIS identification of m/z=191 biomarkers was consistent with empirical results. Therefore, AMDIS can help to reduce the number of experimental steps in identification protocols.

关键词： Automated Mass Spectral Deconvolution and Identification System (AMDIS) heteroatom-containing compounds petroleum identification

Inverse Gas Chromatographic Study of the Oxidation Stability of Lubricating Base Oils via Solubility Parameter Calculations

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色谱 2007年第6期25卷 871-875页

作者： moustafa Nagy Emam EISSA Elham Ahmed Egyptian Petroleum Research Institute

The Flory-Huggins interaction parameter(χ1,2∞) and solubility parameter(δ2) and its hydrogen bonding sensing component(δh) were determined using inverse gas chromatography(IGC).These parameters were successfully used in the probes of chemical changes that occur during the oxidation of naphthenic and paraffinic base oils in a GC *** in χ1,2∞ values reflect the different types of intermolecular interactions(dispersive,polar,hydrogen bonding) of the given lubricating base oil during *** obtained results showed that δh component of solubility parameter is the most important parameter for probing the oxidative-chemical changes during the oxidation of given lubricating oils.

关键词：反相气相色谱氧化稳定性润滑原油溶解参数计算

Moisture dependent physical and mechanical properties of chickpea seeds

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International Journal of Agricultural and Biological Engineering 2010年第4期3卷 80-93页

作者： Ayman H.Amer Eissa Mohamed M A moustafa H Abdul Rahman O.Alghannam Department of Agriculture Systems Engineering College of Agricultural and Food SciencesKing Faisal UniversityP.O.Box 420Al-Hassa 31982Saudi Arabia Agriculture Engineering Department Faculty of AgricultureMinoufiya UniversityShibin El-KomEgypt

The moisture-dependent physical properties are important in designing and fabricating equipment and structures for handling,transporting,processing and storage,and also for assessing *** study was carried out to determine the effect of moisture content on some physical and mechanical properties for two varieties of chickpea seeds(Giza 3,and Giza 195).Four levels of moisture content ranging from 11.6%d.b.(dry basis)to 25.4%*** *** average length,width,thickness,and geometric mean diameter ranged from(7.92±0.04)mm to(8.14±0.04)mm,(6.10±0.04)mm to(6.37±0.04)mm,(6.43±0.04)mm to(6.84±0.04)mm and(6.77±0.07)mm to(7.08±0.07)mm,*** average sphericity and roundness ranged from(85.53±0.19)%to(87.00±0.19)%and(93.70±0.35)%to(94.14±0.35)%,*** average measured surface area,calculated surface area,and projected area ranged from(144.73±1.55)mm2 to(158.78±1.55)mm2,(146.89±1.58)mm2 to(159.78±1.58)mm2,and(46.53±0.50)mm2 to(48.93±0.50)mm2,*** average bulk density,true density,porosity and angle of repose ranged from(730.05±11.84)kg/m3 to(694.17±11.84)kg/m3,(1,225.12±19.51)kg/m3 to(1,308.02±19.51)kg/m3,(44.13±0.49)%to(43.29±0.49)%,and(25.20±0.41)o(degrees)to(29.10±0.41)o(degrees),respectively and also increased linearly with an increase in moisture *** average seed weight and thousand seeds weight ranged from(0.142±0.002)gm to(0.184±0.002)gm,and(177.38±2.17)gm to(194.75±2.17)gm,*** average static coefficient of friction against wood,stainless steel,galvanized iron and iron surfaces and internal with the same seeds ranged from(0.430±0.016)to(0.460±0.016),(0.321±0.007)to(0.366±0.007),(0.327±0.004)to(0.371±0.004),(0.412±0.011)to(0.496±0.011)and(0.638±0.022)to(0.741±0.022),*** average terminal velocity ranged from(5.18±0.34)m/s to(9.14±0.34)m/*** average penetration depth at load 6kg and tools diameter 1 mm was determined as mechanical property,and generally increased in magnitude with an increase i

关键词： moisture physical properties mechanical properties chickpea

Tracking a Tip Vortex with Adaptive Vorticity Confinement and Hybrid RANS-LES

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Open Journal of Fluid Dynamics 2016年第4期6卷 406-429页

作者： Dag-Frederik Feder moustafa Abdel-Maksoud Institute for Fluid Dynamics and Ship Theory Hamburg University of Technology (TUHH) Hamburg Germany

The prediction of coherent vortices with standard RANS solvers suffers especially from discretisation and modelling errors which both introduce numerical diffusion. The adaptive Vorticity Confinement (VC) method targets to counteract one part of the discretisation error: the one due to the discretisation of the convection term. This method is applied in conjunction with a hybrid RANS-LES turbulence model to overcome the overprediction of turbulence intensity inside vortex cores which is a typical deficiency of common RANS solvers. The third main source for numerical diffusion originates from the spatial discretisation of the solution domain in the vicinity of the vortex core. The corresponding error is analysed within a grid convergence study. A modification of the adaptive VC method used in conjunction with a high-order discretisation of the convection term is presented and proves to be superior. The simulations of a wing tip vortex flow are validated in terms of vortex velocity profiles using the results of a wind tunnel experiment performed by Devenport and colleagues (1996). Besides, the results are compared with another numerical study by Wells (2009) who uses a Reynolds Stress turbulence model. It turns out that the application of the modified adaptive VC method on the one hand reinforces the tip vortex, and on the other hand accelerates the axial flow which leads to a slight degradation compared to the experimental results. The result of Wells is more accurate close to the wing, but the result obtained here is superior further downstream as no excessive diffusion of the tip vortex occurs.

关键词： Tip Vortex Adaptive Vorticity Confinement Hybrid RANS-LES Devenport Numerical Diffusion

Rotation Measurement Using Speckle Photography with LiNbO3 Crystal: Theoretical and Experimental Analysis

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Optics and Photonics Journal 2021年第10期11卷 441-452页

作者： Nasser A. moustafa H. Elgebaly Physics Department Faculty of Science Helwan University Cairo Egypt Teachers Colleges of Makkah Umm-Alqura University Umm-Alqura Saudi Arabia Physics Department Faculty of Science Cairo University Giza Egypt

Photorefractive crystals present varied features charming presence, such as high resolution, and normal handling. Depending on the portability of erasing images, photorefractive crystals are convenient for read-write implementations and hence find potential use in speckle photography, speckle interferometry, image processing and holography. A two-beam coupling arrangement using a LiNbO3 crystal as a recording medium for real-time rotation measurement using the coherent and low-power laser source is presented in this paper. A speckle photography technique is advanced for the measurement of a small rotation of a transmitted glass slide sample. New theoretical analysis is formulated for a general case of a slide rotation. Experimental studies are carried out to verify the outcome of the theoretical predictions and accuracy of measurement. Uncertainty of rotation measurement is studied and quantified. The proposed technique is a simple, attractive and alternative method for fringe analysis. The method promises a high degree of accuracy and increased range for rotation measurement in real-time.

关键词： Speckle Photgraphy Photo-Refractive Materials Two-Beam Coupling Measurement Uncertainty Tilt Measurement

New Polymer Syntheses Part 60: A Facile Synthetic Route to Polyamides Based on Thieno[2,3-b]thiophene and Their Corrosion Inhibition Behavior

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Chinese Journal of Polymer Science 2018年第7期36卷 835-847页

作者： Kamal I.Aly Amr H.moustafa Essam K.Ahmed Hany M.Abd El-lateef Mohamed Gamal Mohamed Sahar M.Mohamed Polymer Research Lab Chemistry Department Faculty of Science Assiut University Chemistry Department Faculty of Science Sohag University Chemistry Department Faculty of Science Minia University Chemistry Department College of Science King Faisal university

Polyamides containing thieno[2,3-b]thiophene moiety were prepared via a simple polycondensation reaction of the diaminothieno[2,3-b]thiophene monomer la with different kinds of diacid chlorides （including oxalyl, adipoyl, sebacoyl, isophthaloyl, terephthaloyl, 4,4＇-azodibenzoyl, 3,3＇-azodibenzoyl, p-phenylene diacryloyl） in the presence of LiC1 and NMP as a solvent through lowtemperature solution polycondensation. The chemical structures of model compound and synthesized polyamides were confirmed by FTIR, nuclear magnetic resonance spectroscopy （including 1 H-NMR and 13 C-NMR） and elemental analysis. In addition, the thermal stability, crystallinity structure and surface morphology of synthesized polyamides were characterized via thermogravametric analysis （TGA）, wide-angle X-ray diffraction analysis （WAXD） and scanning electron microscopy （SEM）. Also, the corrosion inhibition behavior of selected examples ofpolyamides was investigated; the inhibitive effect of the investigated polymers for carbon steel in 1.0 mol＇L-1 HCI was studied using potentiodynamic polarization （PDP） and electrochemical impedance spectroscopy （EIS） methods. PDP results displayed that the polyamides containing thieno[2,3-b]thiophene moiety can be as mixed-type inhibitors. The inhibition efficiency （P, %） was found to be in the range from 67.13% to 96.01%. There is an increase in P by the synthesized polymers in comparison to the starting monomer. The adsorption of these polymers was found to obey Langmuir adsorption isotherm.

关键词： Thieno[2 3-b]thiophene Polymer synthesis Thermal properties Industrial applications Corrosion inhibition

Wafer-level vapor cells filled with laser-actuated hermetic seals for integrated atomic devices

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Microsystems & Nanoengineering 2022年第6期8卷 225-235页

作者： Vincent Maurice Clément Carlé Shervin Keshavarzi Ravinder Chutani Samuel Queste Ludovic Gauthier-Manuel Jean-Marc Cote Rémy Vicarini moustafa Abdel Hafiz Rodolphe Boudot Nicolas Passilly IEMN-Institut d’Electronique de Microélectronique et de Nanotechnologie UMR8520 CNRSUniversitéLilleCentrale LilleF-59000 LilleFrance FEMTO-ST Institute UMR6174 CNRSUniversitéBourgogne Franche-ComtéF-25030 BesançonFrance

Atomic devices such as atomic clocks and optically-pumped magnetometers rely on the interrogation of atoms contained in a cell whose inner content has to meet high standards of purity and ***-blowing techniques and craftsmanship have evolved over many decades to achieve such standards in macroscopic vapor *** the emergence of chip-scale atomic devices,the need for miniaturization and mass fabrication has led to the adoption of microfabrication techniques to make millimeter-scale vapor ***,many shortcomings remain and no process has been able to match the quality and versatility of glass-blown ***,we introduce a novel approach to structure,fill and seal microfabricated vapor cells inspired from the century-old approach of glass-blowing,through opening and closing single-use zero-leak microfabricated *** valves are actuated exclusively by laser,and operate in the same way as the“make-seals”and“break-seals”found in the filling apparatus of traditional *** structures are employed to fill cesium vapor cells at the *** make-seal structure consists of a glass membrane that can be locally heated and deflected to seal a *** break-seal is obtained by breaching a silicon wall between *** new approach allows adapting processes previously restricted to glass-blown *** can also be extended to vacuum microelectronics and vacuum-packaging of micro-electro-mechanical systems(MEMS)devices.

关键词： filled vacuum heated