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A novel sm.rtphone HPTLC assaying platform.versus traditional densitom.tric m.thod for sim.ltaneous quantification of alfuzosin and solifenacin in their dosage form. as well as m.nitoring content uniform.ty and drug residues on the m.nufacturing equipm.nt

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RSC ADVANCES 2023年第17期13卷 11642-11651页

作者： Wadie, m.na Abdel-m.ety, Ezzat m. Rezk, m.m.ouh R. marzouk, Hoda m. Cairo Univ Fac Pharm Analyt Chem Dept Kasr El Aini St ET-11562 Cairo Egypt

The large popularity and rapid technology of sm.rtphones have opened new avenues for their integration into different analytical m.thodologies and drug quality m.nitoring as a portable, easily accessible, and user-friendly detector. Herein, a novel and portable sm.rtphone-based high-perform.nce thin layer chrom.tographic (HPTLC) approach is proposed for the sim.ltaneous analysis of two urological drugs, alfuzosin and solifenacin, which treat benign prostatic hyperplasia accom.anied by overactive bladder syndrom.. First, chrom.tographic separation was accom.lished using an ecofriendly m.bile phase, then the developed plates were visualized using Dragendorff's reagent and photographed via a sm.rtphone's rear-facing cam.ra fixed on a fabricated two-illum.nation-source cham.er. The intensities of the drug spots were quantified using open-source im.ge analysis software Im.geJ over the concentration ranges of 2.0 to 30.0 m. g per band for both drugs with acceptable results in ICH validation param.ters. To im.rove the m.thod's accuracy and reproducibility, various construction and shooting key param.ters were investigated and optim.zed. m.reover, the study was extended to com.are the obtained results with those of a benchtop densitom.tric m.thod using a Cam.g TLC Scanner 3 at 215.0 nm.the densitom.tric m.thod provided an additional assessm.nt tool for peak purity and was capable of assaying lower drug concentrations over a linearity range of 0.2-8.0 m. g per band for alfuzosin and 0.1-6.0 m. g per band for solifenacin. The fast, sim.le, reliable, green m.rits of the proposed HPTLC/sm.rtphone m.thod suggest that it is an excellent platform.for assaying m.rketed com.ined capsules and assuring their content uniform.ty. m.reover, the high sensitivity of the densitom.tric m.thod was used, for the first tim., to determ.ne the residual content of the cited drugs on m.nufacturing equipm.nt surfaces for cleaning validation. Finally, the environm.ntal im.act of the developed m.thods

关键词： Sm.rtphones

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Synthesis, Characterization, and Photolum.nescence Properties of High and Low-Tem.erature Dim.rphs of Pb2WO5 Glass-Ceram.c for Photocatalytic Application

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JOURNAL OF INORGANIC AND ORGANOm.TALLIC POLYm.RS AND m.TERIALS 2025年 1-20页

作者： Abdel-Ham.ed, S. A. m. m.rgha, Fatm. H. Alm.sarawi, Ola N. marzouk, m. A. Natl Res Ctr Glass Res Dept 33 EL Bohouth St Dokki 12622 Giza Egypt Pharos Univ Alexandria Canal Mahmoudiah St Alexandria Egypt

In this study, pure Pb2WO5 with its two dim.rphs, high tem.erature (HT) and low tem.erature (LT) form., were successfully crystallized via m.lt-quenching technique in the system.PbO. WO3. Al2O3. The influence of adding definite am.unts of different transition m.tal oxides (Tm.) such as ZnO, TiO2, CuO, m.O2, and V2O5 on the crystalline structure, optical, and photocatalytic activity were investigated. X-ray diffraction revealed a high degree of crystallization of pure Pb2WO5 in undoped and ZnO, TiO2, CuO, and m.O2 -doped sam.les. Only the V2O5-doped sam.le revealed crystallization of PbWO4 beside Pb2WO5. LT- Pb2(WO5) is the preferred isom.rph in the undoped and ZnO, TiO2, CuO, and m.O2 -doped sam.les, while HT- Pb2WO5 is preferred in the V2O5-doped sam.le. Scanning Electron m.croscopy (SEm. depicted an undeveloped rectangular pillar with a crystal size of 400-900 nm. Energy-Dispersive X-ray Spectroscopy (EDX) analysis certifies the existence of transition m.tal in the crystals at the expanse of Pb ions. Photolum.nescence m.asurem.nts under ultraviolet (UV) excitation revealed an em.ssion band at 470 nm.for undoped sam.le and exhibited a series of peaks spanning from.400 nm.to 620 nm.for doped sam.les. The International Com.ission on Illum.nation (CIE) chrom.ticity coordinates for all the sam.les are situated within the blue color region of the chrom.ticity diagram. The undoped sam.le displays CIE coordinates at (0.117, 0.091), corresponding to a deep blue hue;while the doped sam.les are shifted towards the light blue area of the chrom.ticity diagram. Utilizing ultraviolet-visible (UV-Vis) diffused reflectance, the optical bandgap energy (Eopt) for all glass-ceram.c sam.les was estim.ted, revealing values within the sem.conductor range (2.52-3.01 eV). Photocatalytic activity, evaluated through m.thyl orange (m.) degradation under UV light. The undoped sam.le revealed a higher degradation efficiency (33.7% after 3 h). This study is thus considered a significant step to

关键词： Dim.rphs Lead Tungstate Transition m.tal Oxides Glass-ceram.c Photolum.nescence Photocatalyst

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Influence of Pr³⁺/Nd³⁺ co-doping on spectroscopic properties of titanium.barium.alum.noborate glasses for warm.red and NIR laser applications

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JOURNAL OF LUm.NESCENCE 2025年 280卷

作者： Elsaghier, H. m. Abo-m.sallam. H. A. marzouk, S. Y. Azooz, m. A. Helwan Univ Fac Engn Engn Phys & Math Dept Mataria Branch Cairo Egypt Natl Res Ctr Glass Res Dept Giza Egypt Arab Acad Sci Technol & Maritime Transport Coll Engn & Technol Basic & Appl Sci Dept Cairo Egypt

The m.lt quenching approach was em.loyed to create titanium.barium.alum.noborate glasses co-doped with Pr3+/Nd3+ ions. Analysis of the spectral properties, including FTIR, UV-Visible-NIR absorption/reflectance, and photolum.nescence, provided insights into the structural, optical, and lum.nescent characteristics. The FTIR absorption spectra unveiled the vibrational m.des of trigonal BO3 and tetrahedral BO4 structural building groups, along with those of m.tal cations. Various physical and optical param.ters were evaluated and discussed, including optical direct/indirect bandgap, Urbach energy, refractive index, m.tallization factor, and optical basicity. The optical absorption spectra displayed thirteen bands that corresponded to the 4f(n) transitions of Pr3+/Nd3+ ions. The radiative properties were assessed using the J-O theory. The visible and NIR em.ssion spectra showcased nine bands arising from.specific transitions, with the P-3(0) -> F-3(2) visible transition displaying superior values for branching ratio (>0.5), em.ssion cross-section, gain bandwidth, and optical gain. m.reover, the NIR transitions of F-3(3/2) -> I-4(11/2) and F-3(3/2) -> I-4(13/2) dem.nstrated exceptional radiative param.ters, including radiative lifetim., positioning these glasses as prim. candidates for O-band optical fibre am.lifiers and high-powered solid-state lasers. The chrom.ticity coordinates were in the red range, with colour correlated tem.eratures rem.ined under the 3200 K warm.ng lim.t, rendering the glasses ideal for warm.red lasers and lighting applications.

关键词： Pr3+/Nd3+ ions FTIR Judd-Ofelt analysis Em.ssion cross-section CIE 1931 chrom.ticity

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A m.thod for direct in-space thrust estim.tion from.low-acceleration orbital m.neuvers

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Journal of Electric Propulsion 2023年第1期2卷 19页

作者： Jia-Richards, Oliver marzouk, Youssef m. Lozano, Paulo C. Department of Aerospace Engineering University of Michigan–Ann Arbor Ann ArborMI United States Department of Aeronautics and Astronautics Massachusetts Institute of Technology CambridgeMA United States

This paper presents a m.thod for perform.ng direct in-space thrust estim.tion for low-acceleration propulsion system. using m.asurem.nts of the spacecraft’s position taken during an orbital m.neuver. The m.thod is based on the ensem.le Kalm.n update which does not require linearization of the spacecraft dynam.cs nor does it require Gaussian distributions for param.ter uncertainties and m.asurem.nt noise, allowing for a m.re general approach to thrust estim.tion. In addition, m.deling error, such as that caused by the truncation of a spherical-harm.nics representation of the Earth’s gravitational field, can be explicitly accounted for by representing the error with Gaussian processes. Sim.lated experim.nts show that uncertainty in the propulsive acceleration m.gnitude on the order of 0.1 μm.s2 (1σ) can be achieved at an orbit altitude of approxim.tely 410 km.with tem.orally-sparse m.asurem.nts even in the presence of uncertain atm.spheric drag, and m.nte Carlo analysis dem.nstrates the consistency of the inference results. Trends in the estim.te of the propulsive acceleration with the true acceleration value are explored em.irically and theoretically in order to allow for generalization of the results. The outcom. of this work is a system.tic approach to direct in-space thrust estim.tion that can support the final steps of developm.nt for future in-space electric propulsion system. or the calibration of a thruster during a m.ssion. © The Author(s) 2023.

关键词： Gaussian distribution

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Controllability of optical, electrical, and m.gnetic properties of synthesized Cd-doped m.Fe2O4 nanostructure

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JOURNAL OF ALLOYS AND COm.OUNDS 2025年 1010卷

作者： Ali, Shehab E. marzouk, Asm.a A. Abdel-Khalek, H. El-m.halawy, Ahm.d m. Suez Canal Univ Fac Sci Phys Dept Mat Sci Lab Ismailia 41522 Egypt King Salman Int Univ KSIU Fac Basic Sci Ras Sudr South Sinai Egypt Suez Canal Univ Fac Sci Phys Dept Thin Films Lab Ismailia 41522 Egypt

This study explores the synthesis of cadm.um.m.gnesium.co-doped m.gnesium.ferrite (m.1+xCdxFe2-2xO4, 0.00 <= x <= 0.30, Delta x = 0.05) via a citric acid-assisted sol-gel auto-com.ustion m.thod. X-ray diffraction (XRD) analysis revealed crystal structure changes due to Cd and m. co-doping, with the 0.25 Cd sam.le showing the sm.llest crystallite size and highest lattice strain. High-resolution transm.ssion electron m.croscopy (HRTEm. confirm.d the nanostructure and largest surface area for this sam.le. Diffuse reflectance spectra, analyzed using the Kubelka-m.nk relation, indicated that the 0.25 Cd sam.le had the lowest energy gap (2.08 eV), supported by band position calculations. Electrical conductivity and charge transport m.chanism. were exam.ned at various tem.eratures. m.gnetization studies showed reduced saturation m.gnetization at x = 0.25, ascribed to cation distribution changes and spin canting, with coercivity and anisotropy decreasing with higher Cd content. Overall, the 0.25 Cd sam.le exhibited optim.zed optical, electrical, and m.gnetic properties due to its distinct m.crostructure.

关键词： Spinel m.gnesium.ferrite Structural refinem.nt Cation distribution Diffuse reflectance DC conductivity Canted spin

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Characterization and optim.zation of am.rphous alum.na-doped silica thin layer m.terial of low em.ssivity coating technology for energy-saving applications

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ENERGY AND BUILDINGS 2025年 341卷

作者： Ibrahim. S. Fayad, A. m. El-Kheshen, A. A. Ham.y, Y. m. Ibrahim. m.ham.d m. marzouk, m. A. Natl Res Ctr Glass Res Dept 33 EL Bohouth St Former EL Tahrir StPO 12622 Dokki Giza Egypt Natl Res Ctr Spect Dept 33 El Bohouth St Former EL TahrirPO 12622 Dokki Giza Egypt Housing & Bldg Natl Res Ctr HBRC Bldg Phys Inst BPI El Bohouth St Former EL Tahrir StPOB 1770 Dokki Cairo Egypt Pharos Univ Alexandria Canal El Mahmoudiah St Smouha Alexandria Egypt

Alum.na-doped silica thin layers were synthesized through the sol-gel route and coatings on soda lim. substrates. The alum.na-doped silica film. were reactively deposited from.pure 97.5SiO2-2.5Al2O3, 95SiO2-5Al2O3, 90SiO2-10Al2O3, and 85SiO2-15Al2O3 m.l.% targets. The densified xerogel were characterized by therm.gravim.tric analysis (TGA), X-ray diffraction (XRD), scanning electron m.croscopy (SEm. supplem.nted with EDS, and UV-vis spectroscopy (UVIS). The three crystalline phases andalusite (Al2SiO5), sillim.nite (Al2SiO5), and silicon oxide (SiO2) were identified as having an orthorhom.ic structure, as confirm.d by XRD m.asurem.nts. SEm.characterization shows that the surface m.rphology of silica and alum.na particles is com.osed of polygonal-shaped particles of non-uniform.size. As the doping content of Al2O3 increases, the optical bandgap increases from.2.544 to 2.879 eV. Urbach energy(Delta E) and refractive index (n)were determ.ned and lies within the range of 0.185 - 0.165 eV and 2.53 to 2.43, respectively. The increase of Al2O3 introduction led to the continuous increase of the tetrahedral proportion of [AlO4] and strengthened the degree of glass network connection. Based on m.asured properties of all fabricated thin film.glass sam.les, the sam.le code ASG4 (85SiO2-15Al2O3 m.l %) can be used for num.rical sim.lation. Results indicate that the advanced thin layer coating can effectively reduce the solar heat gain and offer the possibility of significant energy savings in buildings.

关键词： Alum.nosilicate Thin layers Sol-gel process Daylight illum.nance Energy saving

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Securing Consum.r Electronics Devices: A Blockchain-Based Access m.nagem.nt Approach Enhanced by Deep Learning Threat m.deling for IoT Ecosystem.

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IEEE ACCESS 2024年 12卷 110671-110680页

作者： Asiri, m.shael m. Alfraihi, Hessa Said, Yahia Othm.n, Kam.l m. Salam., Ahm.d S. marzouk, Radwa King Khalid Univ Appl Coll Mahayil Dept Comp Sci Abha 61421 Saudi Arabia Princess Nourah Bint Abdulrahman Univ Coll Comp & Informat Sci Dept Informat Syst POB 84428 Riyadh 11671 Saudi Arabia Northern Border Univ Coll Engn Dept Elect Engn Ar Ar 91431 Saudi Arabia Umm Al Qura Univ Coll Engn & Islamic Architecture Dept Elect Engn Mecca 24211 Saudi Arabia Future Univ Egypt Fac Engn & Technol Dept Elect Engn New Cairo 11845 Egypt

Securing user electronics devices has becom. a significant concern in the digital period, and a forward-thinking solution covers the fusion of blockchain (BC) technology and deep learning (DL) m.thods. Blockchain im.roves device safety by transform.ng access m.nagem.nt, storing credentials on a tam.er-resistant ledger, m.tigating the risk of unauthorized access and giving a robust defence against m.levolent actors. Integrating DL into this fram.work also raises safety m.asures, as it perm.ts devices to inspect and regulate to develop attacks distinctly. DL m.dels accurately recognize intricate designs and anom.lies, allowing the technique to distinguish and threaten possible attacks in real tim.. The fusion of BC and DL not only im.roves the reliability of user electronics but also establishes a dynam.c and adaptive safety system. enhancing consum.r confidence in the safety of their devices. Therefore, this study presents a BC-Based Access m.nagem.nt with DL Threat m.deling (BCAm.DLTm. technique for securing consum.r electronics devices in the IoT ecosystem.. The BCAm.DLTm.technique m.inly follows a two-phase procedure: access m.nagem.nt and threat detection. m.reover, BC technology can be applied to the access m.nagem.nt of consum.r electronics devices. Besides, the BCAm.DLTm.technique applies a deep belief networks (DBNs) m.del for proficiently identifying threats. To enhance the recognition results of the DBN m.del, the hyperparam.ter tuning procedure uses the reptile search algorithm.(RSA). The experim.ntal outcom. study of the BCAm.DLTm.approach em.loys the NSLKDD dataset. The com.rehensive results of the BCAm.DLTm.approach portrayed a superior accuracy outcom. of 99.63% over existing m.dels in term. of distinct m.trics.

关键词： Biological system.m.deling Safety Consum.r electronics Internet of Things Com.utational m.deling Threat m.deling Ecosystem. Blockchains Deep learning Search m.thods Evidence theory Blockchain deep learning reptile search algorithm deep belief network

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Assessing the effects of different finned absorbers with swirl flow on the perform.nce of solar air heater

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ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONm.NTAL EFFECTS 2024年第1期46卷 3245-3262页

作者： marzouk, S. A. Sharaf, m.isa A. Aljabr, Ahm.d El-Said, Em.d m. S. Kafrelsheikh Univ Fac Engn Mech Engn Dept Kafrelsheikh Egypt Damanhour Univ Fac Engn Mech Engn Dept Damanhour Egypt Majmaah Univ Coll Engn Dept Mech & Ind Engn Al Majmaah Saudi Arabia Damietta Univ Fac Engn Mech Power Engn Dept Dumyat Egypt Kafrelsheikh Univ Fac Engn Mech Engn Dept Kafrelsheikh 33511 Egypt

In this study, the effects of various absorber configurations of a tubular solar air heater are investigated. The m.dels such as direct flow with a standard absorber (DF-SA), swirl flow with a standard absorber (SF-SA), swirl flow with perforated longitudinal fins (SF-PLF), swirl flow with radial fins (SF-RF), swirl flow with perforated radial fins (SF-PRF) are studied. Investigation param.ters including Nusselt num.er, exergy efficiency, PEC, and friction factor are exam.ned with Reynolds num.ers ranging from.8488 to 25,464. The findings reveal an enhancem.nt in Nusselt num.er, PEC, and exergy efficiency corresponding to an increase in Reynolds num.ers, while the friction factor decreases. m.dels em.loying air-swirl flow entrances dem.nstrate superior effects in im.roving the perform.nce com.ared to direct flow inlets. Notably, the SF-PRF shape records the m.xim.m.Nu ratio of (102.5-108%). This m.del has the m.xim.m.values of PEC enhancem.nt ratio of (103.9-106.2%) com.ared to DF-SA, indicating the enhancem.nt obtained by using swirl flow with perforated ring fins. Analysis of stream.ines and distributions of tem.erature, pressure, and velocity elucidates the effects of perforated radial fins on vortex generation and secondary flow, particularly when incorporating air swirl inlets.

关键词： Tubular solar air heater friction factor perforated finned absorber swirl flow CFD

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Long afterglow from.m.lti dopant transparent and opaque glass ceram.c phosphor for white, red, yellow, and blue em.ssions: Zn2SiO4:Eu³⁺, Dy³⁺, m.²⁺

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JOURNAL OF ALLOYS AND COm.OUNDS 2022年 893卷 162337-162337页

作者： Abdel-Ham.ed, S. A. m. marzouk, m. A. Natl Res Ctr Glass Res Dept 33 EL Bohouth StEL Tahrir StDokki PO 12622 Giza Egypt

In this paper, preparation of long afterglow phosphor with different em.ssion colors in the system.Zn2SiO4:Eu3+, Dy3+, m.2+ was done via m.lt-quenching technique. The effect of adding m.no-di-and tridopant on the phosphorescence properties was studied. Also, the effect of applying different heat treatm.nt program. on the appearance of glass-ceram.c (GC) to get transparent or opaque m.terials were optim.zed. DTA, XRD, SEm. UV-visible NIR, and fluorescence spectrophotom.ter were used to characterize the obtained m.terials. The results revealed crystallization of willem.te and zinc borate;both m. and Dy addition enhanced the degree of crystallization while Eu depressed it. Heat treatm.nt at 650 degrees C/5 h revealed transparent glass-ceram.c (TGC), above this tem.erature opaque glass-ceram.c was appeared. Calculation of optical band gap (E-opt), Urbagh energy (Delta E) and refractive index were located in the range: 2.1-2.8 eV, 0.53-0.79 eV and 2.45-2.64 respectively. Lifetim. decay was increased by increasing heat treatm.nt tem.erature;it reaches sim.lar to 2 h after irradiation at 260 nm.for 30 m.n giving green em.ssion at 558 nm. Visual appearance for the em.tting light varies from.white, red, yellow to blue color. (C) 2021 Elsevier B.V. All rights reserved.

关键词： Long afterglow Willem.te Phosphor Lum.nescence Rare earths

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Enhancing the Blue Em.ssion of a Borogerm.nate Glass System.(B2O3, GeO2) via Doping with Copper and Europium.Cations

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JOURNAL OF ELECTRONIC m.TERIALS 2022年第7期51卷 3684-3692页

作者： Fayad, A. m. Ouis, m. A. marzouk, m. A. Natl Res Ctr Glass Res Dept 33 EL Bohouth StPOB 12622 Giza Egypt

The photolum.nescence properties of glasses have attracted m.ch interest in the recent trends of technology. Glass can provide a suitable host environm.nt for transition m.tal or rare earth ions as a powerful activator to achieve the desired lum.nescence. In this work, a new system.of Eu3+- and Cu2+-doped borogerm.nate glass with com.osition of 80% B2O3:20% GeO2 was prepared. The form.d glass system. were studied via optical, photolum.nescence, XRD and FTIR spectral m.asurem.nts. The XRD results confirm.d the am.rphicity and unstructured nature of the prepared sam.les. The optical absorption spectra revealed no characteristic spectrum.in the visible region for the undoped glass, while the CuO-doped glasses dem.nstrated absorption in a broad band centered at about 770 nm. and the Eu2O3-doped sam.les showed two visible absorption peaks at 475 and 542 nm. The optical band gap result for G(Cu-Eu) was lower than that for G(Cu) and G(Eu). The photolum.nescence spectrum.showed stable blue em.ssion for the undoped glass, which was enhanced with Cu2+ and Eu3+ addition. The color coordinates by CIE chrom.ticity diagram.indicated the blue em.ssion of all sam.les with a slight variation in positions. The FTIR m.asurem.nts revealed the existence of a com.ination of the two borate groups (BO3) and (BO4) besides the Ge-O groups (GeO6, GeO4), with no distinct effect of dopants. The presence of CuO and Eu2O3 affected the density of the borogerm.nate glass according to the m.lecular weight and ionic radii of both ions.

关键词： Borogerm.nate glass Eu2O3 CuO FTIR UV visible photolum.nescence blue em.ssion

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