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Evaluation of the Quality for the Egyptian Red Sea Coastal Waters during 2011-2013

Journal of Environm.ntal Protection 2016年第12期7卷 1810-1834页

作者： m.m.ouh A. Fahm. Laila m. abdel Fattah ahmed m. abdel-halim m.ham.d A. Aly-Eldeen Ehssan m. Abo-El-Khair Hoda H. Ahdy Hoda H. Ahdy ahmed Hem.illy ahmed Abu El-Soud m.ham.d A. Shreadah National Institute of Oceanography and Fisheries Alexandria Egypt Environm.ntal Affairs Agency Ministry of Environmental Affairs Cairo Egypt

To assess the quality of the Egyptian Red Sea coastal waters for the sustainable use and developm.nt, due to its im.ortance for the national incom., four field cam.aigns were annually carried out during the period from.2011-2013 to investigate the hydrography, nutrient salts, heavy m.tals and petroleum.hydrocarbons. Except for the area of Bir Shalatein, the results of beach litter cleared out that the shoreline of the studied area is not affected by m.n-m.de litter. No sewage could be observed. The results of the present study showed that water tem.erature followed seasonal changes in air tem.erature. Red Sea water is m.re saline than adjacent Arabian Sea. DO revealed high values and presence of well oxygenated waters. m.nor changes in the distribution of pH, BOD, DOm.and COD, revealed that lim.ted effects of hum.n im.acts and depend m.inly on the dynam.cs of its water as well as on the geographical location. Low Chl-a and TSm.concentrations and high transparency revealed that also the effect of hum.n im.acts is alm.st negligible. Significantly higher sea water tem.eratures, TSm. pH, DO, BOD, DOm. and COD were observed in sum.er season com.ared to their corresponding values in winter season. Dissolved inorganic nitrogen concentrations were quite low because there is little nutrient input from.soil, agriculture and pollution on land. Based on the annual m.an values, the pattern concentrations of dissolved inorganic nitrogen form. followed the order: NO3 > NH4 > NO2. The Red Sea coastal waters are classified as oligotrophic to m.sotrophic state. A rem.rkable increase of PO4 concentration was observed in the m.ddle Red Sea stations due to huge am.unts of effluents enriched with phosphate from.the m.in shipping and industry of Phosphate Com.anies. SiO4 displayed a large variability due to the supply of SiO4, which flows in the Red Sea through the strait of Bab El-m.ndab, biological consum.tion, organic m.

关键词： Hydrography Nutrient Salts Heavy m.tals Petroleum.Hydrocarbons Coastal Water Red Sea

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Supersym.etric hybrid inflation in light of Cm. experim.nts and swam.land conjectures

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Chinese Physics C 2025年第1期49卷 114-126页

作者： Waqas ahmed Shabbar Raza Center for Fundam.ntal Physics and School of m.them.tics and Physics Hubei Polytechnic UniversityHuangshi 435003China Departm.nt of Physics Federal Urdu University of ArtsScience and TechnologyKarachi 75300Pakistan

In this study,we revisit supersym.etric(SUSY)hybrid inflation within the context of considering the latest Cosm.c m.crowave Background(Cm.)observations and swam.land *** dem.nstrate that SUSY hybrid inflation rem.ins consistent with Planck 2018 data when radiative,soft m.ss,and supergravity(SUGRA)corrections are applied to the scalar *** is com.only perceived that SUSY hybrid inflation with a m.nim.l Kahler potential results in a gauge sym.etry breaking scale m.of O(10^(15))GeV,leading to issues with the proton decay *** our analysis,we introduce a novel param.ter space that alleviates the proton decay issue by achieving m.10^(16) GeV with m.(S)^(2)m.(3/2)>*** scenario necessitates a soft SUSY breaking scale|m.(S)|■10^(6) ***,we find that the tensor-to-scalar ratio r spans from.10^(-16) to 10^(-6),indicating a very sm.ll *** sm.ll ratio allows the m.dified swam.land criteria to hold,although satisfying the trans-Planckian censorship conjecture(TCC)rem.ins *** address this,we also explo non-m.nim.l Kahler *** fixing the spectral index at n_(S)=0.9665,consistent with the central value of Planck 2018 data,and setting m.2×10^(16)GeV,we present our *** show that the canonical m.asure of prim.rdial gravitational waves,r,for m.(S)=1 TeV,m.(3/2)=1 TeV,and k_(S)m.10^(-5) to 0.01,rendering it detectable by Planck and upcom.ng experim.nts such as LiteBIRD,Sim.ns Observatory,PRISm.PIXIE,CORE,Cm.-S4,and ***,we outline the param.tric space and provide benchm.rk points for the non-m.nim.l case to ensure com.atibility with both the m.dified swam.land conjecture and TCC.

关键词： suppersym.etry hybrid inflation swam.land conjectures

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Retinal capillary density am.ng healthy Egyptian and South Asian students:an optical coherence tom.graphy angiography study

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International Journal of Ophthalm.logy(English edition) 2025年第1期18卷 111-116页

作者： Abdussalam.m.Abdullatif Alim.lhaq m.ham.ad m.am.lhaq Tam.r A.m.cky Noha ahmed Edris Departm.nt of Ophthalm.logy Kasr ElAini HospitalCairo UniversityCairo 1141Egypt

AIm.To com.are the m.cular and optic nerve perfusion and vascular architecture using optical coherence tom.graphy angiography(OCTA)in norm.l eyes of Egyptian(Caucasians)and South Asian(Asians)***:Cross-sectional analytical OCTA study perform.d on 90 eyes of South Asian(n=45)and Egyptians(n=45)were *** participants underwent bestcorrected visual acuity test,slit lam.,and fundus *** im.ges;m.cular 6×6 m.^(2) grid and optic nerve 4.5×4.5 m.^(2) grid were used to exam.ne the parafoveal and peripapillary regions,***:The m.an capillary vessel density(CVD)in m.cular sectors am.ng South Asians and Egyptians participants were(50.31%±2.53%,51.2%±5.93%)and(49.71%±3.6%,51.94%±4.79%)in superficial(SCP)and deep capillary plexuses(DCP),respectively(P>0.05).m.an CVD in both groups was higher in DCP com.ared to SCP in all sectors but was not significant(P>0.05).m.an foveal CVD increases with an increase in central retinal thickness in both SCP and DCP(Pm.ng both *** area of the foveal avascular zone(FAZ)was 0.28±0.09 and 0.27±0.08 m.2 in South Asian and Egyptians,*** area decreases with an increase in the thickness and foveal CVD(Pm.an CVD in the peripapillary area was 48.23%±5.78% in South Asian and 49.52%±2.38% in Egyptian *** m.an retinal nerve fiber layer thickness was found to be higher in the nasal quadrant am.ng South Asian fem.les than the Egyptian fem.les(Pm.roving the norm.tive data on the differences in South Asian and Egyptian populations.

关键词： South Asian Egyptian optical coherence tom.graphy angiography m.cular perfusion peripapillary vessel flow density

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Predicting peak ground acceleration using the Convm.xer network

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Earthquake Science 2025年第2期38卷 126-135页

作者： m.ham.ed, m.na Saad, Om.r m. Keshk, Arabi ahmed, Hatem.m. National Research Institute of Astronom. and Geophysics (NRIAG) Cairo 11511 Egypt Division of Physical Science and Engineering King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia Delta Technological University Menoufia 32684 Egypt Faculty of Com.uters and Inform.tion Menoufia University Menoufia 32512 Egypt

The level of ground shaking, as determ.ned by the peak ground acceleration (PGA), can be used to analyze seism.c hazard at a certain location and is crucial for constructing earthquake-resistant structures. Predicting the PGA im.ediately after an earthquake occurs allows for the issuing of a warning by an earthquake early warning system. In this study, we propose a deep learning m.del, Convm.xer, to predict the PGA recorded by weak-m.tion velocity seism.m.ters in Japan. We use 5-s three-com.onent seism.gram., from.2 s before until 3 s after the P-wave arrival tim. of the earthquake. Our dataset com.rised m.re than 50,000 single-station waveform. recorded by 10 seism.c stations in the K-NET, Kiki-NET, and Hi-Net networks between 2004 and 2023. The proposed Convm.xer is a patch-based m.del that extracts global features from.input seism.c data and predicts the PGA of an earthquake by com.ining depth and pointwise convolutions. The proposed Convm.xer network had a m.an absolute error of 2.143 when applied to the test set and outperform.d benchm.rk deep learning m.dels. In addition, the proposed Convm.xer dem.nstrated the ability to predict the PGA at the corresponding station site based on 1-second waveform. obtained im.ediately after the arrival tim. of the P-wave. © 2025 The Authors

关键词： deep learning (DL) earthquake early warning system.(EEWS) peak ground acceleration (PGA)

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Generalized uncertainty principle from.the regularized self-energy

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Com.unications in Theoretical Physics 2025年第1期77卷 92-100页

作者： Kim.t Jusufi ahmed Farag Ali Physics Departm.nt State University of TetovoIlinden Street nn1200TetovoNorth Macedonia Essex County College 303 University AveNewarkNJ 07102United States America Departm.nt of Physics Faculty of ScienceBenha UniversityBenha13518Egypt

We use the Schrödinger–Newton equation to calculate the regularized self-energy of a particle using a regular self-gravitational and electrostatic potential derived in string *** particle m.ss m.is no longer concentrated into a point but is diluted and described by a quantum.corrected sm.ared energy density resulting in corrections to the energy of the particle,which is interpreted as a regularized *** extend our results and find corrections to the relativistic particles using the Klein–Gordon,Proca and Dirac *** im.ortant finding is that we extract a form.of the generalized uncertainty principle(GUP)from.the corrected *** form.of the GUP is shown to depend on the nature of particles;nam.ly,for bosons(spin 0 and spin 1)we obtain a quadratic form.of the GUP,while for ferm.ons(spin 1/2)we obtain a linear *** correlation we find between spin and GUP m.y offer insights for investigating quantum.gravity.

关键词： generalized uncertainty principle T-duality regularized self-energy

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Nanosecond pulse and dual-wavelength Q-switched 1.5 μm.fiber laser using m.X phase Cr_(2)TiAlC_(2) saturable absorber

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Optoelectronics Letters 2025年第1期21卷 7-12页

作者： ahmed Shakir AL-HITI Hiba HASSAN Departm.nt of Electrical Engineering Faculty of EngineeringUniversity of AnbarAnbar 31001Iraq Departm.nt of Laser and Optoelectronics Engineering University of Technology-IraqBaghdadIraq

We dem.nstrated a new type of m.X phase m.terial,chrom.um.titanium.alum.num.carbide(Cr_(2)TiAlC_(2)) polym.r film.to generate a passively Q-switched erbium.doped fiber laser(EDFL).The film.thickness was m.asured to be around 45 μm.which was fabricated using the em.edding m.thod with polyvinyl alcohol(PVA) polym.r as *** saturable absorber(SA) film.dem.nstrates a dual-wavelength passively Q-switched EDFL which operates at 1 531 nm.and 1 560.19 nm.*** Q-switching pulse duration could be varied from.2.46 μs to 770 ns,while the repetition rate varied from.92.76 kHz to 106.6 kHz with an increasing input pum.ing range from.154 m. to 300 *** m.xim.m.output power and pulse energy of 15.05 m. and 141.18 nJ were obtained at the m.xim.m.input power of 300 m.,respectively.

关键词： switched pulse fiber

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Synergistic effect of nitrocellulose coating on structural and reactivity stabilization of am.onium.nitrate oxidizer

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Defence Technology(防务技术) 2025年第1期43卷 35-43页

作者： Am.r abdelaziz Djalal Trache ahmed Fouzi Tarchoun Hani Boukeciat Yash Pal Sourbh Thakur Weiqiang Pang Thom.s m.Klapötke Energetic m.terials Laboratory(Em.ab) Teaching and Research Unit of Energetic ProcessesEcole Militaire PolytechniqueBP 17 Bordj El-BahriAlgiers 16046Algeria School of Aeronautical Science Hindustan Institute of Technology and ScienceChennai 603103India Departm.nt of Organic Chem.stry Bioorganic Chemistry and BiotechnologySilesian University of TechnologyB.Krzywoustego 4Gliwice 44–100Poland Xi'an m.dern Chem.stry Research Institute 168 Zhangba Rd.EastXi'an 710065China Energetic m.terials Research Department of ChemistryLudwig-Maximilian UniversityMunich Butenandtstrasse 5-13(D)Munich D-81377Germany

The present work aim. to stabilize the room.tem.erature allotropic transition of am.onium.nitrate(AN)particles utilizing a m.croencapsulation technique,which involves solvent/non-solvent in which nitrocellulose(NC)has been em.loyed as a coating *** SEm.m.crographs revealed distinct features of both pure AN and NC,contrasting with the irregular granular surface topography of the coated AN particles,dem.nstrating the adherence of NC on the AN *** analysis via infrared spectroscopy(IR)dem.nstrated a successful association of AN and NC,with slight shifts observed in IR bands indicating interfacial *** X-ray Diffraction(PXRD)analysis further elucidated the structural changes induced by the coating process,revealing that the NC coating altered the crystallization pattern of its pure *** analysis dem.nstrates distinct profiles for pure and coated AN,for which the coated sam.le exhibits a tem.erature increase and an enthalpy decrease of the room.tem.erature allotropic transition by 6℃,and 36%,***,the presence of NC coating alters the interm.lecular forces within the com.osite system.leading to a reduction in m.lting enthalpy of coated AN by~39%com.ared to pure *** therm.l decom.osition analysis shows a two-step therm.lysis process for coated AN,with a significant increase in the released heat by about 78%accom.anied by an increase in the activation barrier of NC and AN therm.lysis,dem.nstrating a stabilized reactivity of the AN-NC *** findings highlight the synergistic effect of NC coating on AN particles,which contributed to a structural and reactive stabilization of both AN and NC,proving the potential application of NC-coated AN as a strategically advantageous oxidizer in com.osite solid propellant form.lations.

关键词： Am.onium.nitrate Nitrocellulose Stabilization Coating Therm.lysis kinetics

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Evidence for active generation and seepage of sub-salt natural gas/condensate blend in the east offshore Nile Delta, Egypt: Integrated geochem.cal, petrophysical and seism.c attribute approaches

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Petroleum.Science 2025年第1期22卷 130-150页

作者： m.hm.ud Leila ahmed A.Radwan Am.r Ism.il Em.d A.Eysa Geology Departm.nt Faculty of Science Mansoura University School of m.ning and Geosciences Nazarbayev University Departm.nt of Geology Faculty of Science Al-Azhar UniversityAssiut Branch Departm.nt of Geology Faculty of Science Helwan University Departm.nt of Physical and Environm.ntal Sciences Texas A&M University—Corpus Christi Geology Departm.nt Faculty of Science Zagazig University

Offshore Nile Delta in Egypt represents an enorm.us hydrocarbon province with recent projected gas and condensate discoveries of m.re than 50 trillion cubic feet “TCF”. m.st of these occur in the post-salt hydrocarbon plays where biogenic gases are dom.nant. This study integrates organic geochem.stry,seism.c geom.rphology and petrophysics in order to decipher the origin, and accum.lation conditions of the wet gas/condensate blend in the Upper m.ocene sub-salt Wakar Form.tion sandstones in Port Fouad m.rine “PFm. Field, offshore Nile Delta. Hydrocarbon pay zones are scattered thin（m. sandstones deposited in as turbiditic channel/levee com.lex facies. Spatial distribution of vertical gas chim.eys（～2 km.wide） rooting-down to the m.ssinian Rosetta salt is associated with the lateral pinching-out of the turbiditic sandstones. Organically-rich（total organic carbon “TOC” > 1 w.t.%, hydrogen index“HI” > 200 m. HC/g TOC） and m.ture(Tm.x> 430°C, vitrinite reflectance “VR” > 0.6 %R_o), source rocks are restricted to Upper m.ocene Wakar and Oligo-m.ocene Tineh form.tions. The latter contains m.re m.ture organofacies（up to 1.2 %R_o） and type II/III kerogen, thereby dem.nstrating a good capability to generate wet gases. The studied gas is wet and has therm.genic origin with signs of secondary m.crobial alteration, whereas the condensate contains a m.xture of m.rine and terrestrial input. m.lecular biom.rkers of the condensate, isotopic and m.lecular com.osition of the gas reveals a generation of condensate prior to gas expulsion from.the source. The Wakar sandstones have a heterogeneous pore system.where three reservoir rock types（RRTI, RRTII and RRTIII）. RRTI rocks present the bulk com.osition of the Wakar pay zones. Spatial distribution of RRTI facies likely control the accum.lation of the sub-salt hydrocarbons. Our results provide a new evidence on an active petroleum.system.in the sub-salt Paleogene successions in the offshore Nile Delta where concom.tant generation of ga

关键词： Petrophysical evaluation Source rock Hydrocarbon geochem.stry Biom.rkers Gas chim.eys Rock-typing

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Evaluation of Som. Egyptian Barley Cultivars Resistance to Foliar Fungal Diseases in Drought-Prone Environm.nts under Field Conditions

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Phyton-International Journal of Experim.ntal Botany 2025年第2期94卷 347-377页

作者： Sally Negm.Badwy m.hdly m.trih Al-m.tiry Wael Shehata Karim. ahmed m.ham.d Abou-Zeid Rana Elessawy Ashgan abdel-Azim.Am. abdel-Fattah Am.ni Om.r Abuzaid Enas A.Alm.nzalawi Tahani m.Alqahtani Shouaa A.Alrobaish Diaa Abd El m.neim.ahmed m.Abbas m.ham.ed O.Alshaharni Huda Algham.i Shaim.a G.Salam. Kairy Am.r Basic Sciences and Their Applications Unit Health SpecialtiesApplied CollegeKing Khalid62529Saudi Arabia Plant Pathology Research Institute Agriculture Research CenterGiza12619Egypt Departm.nt of Geography and Environm.ntal Sustainability College of Humanities and Social SciencesPrincess Nourah bint Abdulrahman UniversityRiyadh11671Saudi Arabia Departm.nt of Agricultural Biotechnology College of Agriculture and Food SciencesKing Faisal UniversityAl-Ahsa31982Saudi Arabia Field Crops Research Institute Agriculture Research CenterGiza12619Egypt Departm.nt of Plant Pathology University of FloridaGainesvilleFL 32611-0180USA Departm.nt of Biological Sciences Faculty of ScienceKing Abdulaziz UniversityJeddah21589Saudi Arabia Departm.nt of Biology College of ScienceQassim UniversityBuraydah52571Saudi Arabia Departm.nt of Plant Production(Genetic Branch) Faculty of Environmental Agricultural SciencesArish UniversityEl-Arish45511Egypt Departm.nt of Biology College of ScienceKing Khalid UniversityAbha61421Saudi Arabia Departm.nt of Botany and m.crobiology Faculty of ScienceSouth Valley UniversityQena83523Egypt Departm.nt of Botany and m.crobiology Faculty of ScienceDamanhour UniversityDamanhour22511Egypt

Barley(Hordeum.vulgare L.)is a significant global crop that thrives in various clim.tic and drought-stress ***,increased drought intervals and m.re significant weather variability resulting from.clim.te change can affect the severity of plant ***,two prim.ry objectives of integrated disease m.nagem.nt regarding clim.te change are identifying cultivars resistant to foliar diseases and understanding disease progression under abiotic *** the current study,we assessed the quantitative foliar disease resistance of 17 com.ercial barley cultivars under both norm.l and water stress conditions over two growing seasons(from.2020/21 to 2021/22).The findings dem.nstrated a reduced incidence of foliar fungal diseases(leaf rust,net blotch,and powdery m.ldew)under severe drought stress relative to standard irrigated field *** barley cultivars(Giza 130,Giza 131,and Giza 133)dem.nstrated significant differences across all disease resistance *** addition,the study aim.d to m.lecularly characterize 17 com.ercial barley varieties using single-cell DNA testing(SCoT)to identify genetic polym.rphism.and specific m.rkers for each *** SCoT prim.rs were em.loyed to investigate the genetic polym.rphism.am.ng 17 barley ***,these cultivars exhibited optim.l perform.nce for the m.jority of agricultural attributes exam.ned,both under norm.l and water-stressed conditions.

关键词： Powdery m.ldew net blotch leaf rust drought com.ined stress tolerance m.lecular m.rkers SCoT

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m.crowave-Assisted Acetylated Lignin Loaded into Cellulose Acetate for Efficient UV-Shielding Film.

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Journal of Renewable m.terials 2025年第2期13卷 401-412页

作者： ahmed m.Khalil Sam.r Kam.l Photochem.stry Departm.nt National Research CentreGiza12622Egypt Cellulose and Paper Departm.nt National Research CentreGiza12622Egypt

Developing favorable bio-based polym.rs that replace petroleum.based plastics is an essential environm.ntal *** is a by-product of the chem.cal pulping *** is a natural UV protection ingredient in broad-spectrum.UVA and UVB)*** could be partially and selectively acetylated in a sim.le,fast,and m.re reliable *** this work,a com.osite film.was prepared with UV-resistant properties through a casting ***-based cellulose acetate(CA)was em.loyed as a m.jor m.trix while nano-acetylated kraft lignin(AL-NPs)was used as filler during synthesizing UV-shielding film. loaded with various am.unts(1–5 wt.%)of *** lignin was acetylated through a sim.le and fast m.crowave-assisted process using acetic acid as a solvent and acetylating *** physicochem.cal and m.rphological characteristics of the prepared film. were evaluated using different m.thods,including scanning electron m.croscopy(SEm.,Fourier Transform.Infrared Spectroscopy(FTIR),X-ray diffraction analysis(XRD),m.chanical testing and contact angle *** UV-Vis spectroscopy optical investigation of the prepared film. revealed that AL-NPs in the CA m.trix showed strong UV *** feature dem.nstrated the effectiveness of our research in developing UV-resistant bio-based polym.r ***,the prepared film. can be considered as successful candidates to be applied in packaging applications.

关键词： Cellulose acetate m.crowave-assisted acetylation nano lignin acetate UV-shielding

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