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Geochemistry of Neoproterozoic metavolcanic rocks from the Tahtai Logomiti area,Tigrai,Northern Ethiopia:Implication for petrogenesis and tectonic settings

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Acta Geochimica 2025年第1期44卷 128-144页

作者： Azeb Gebremicale Mulugeta Alene Teklay Gidey School of Earth Sciences Mekelle UniversityP.O.Box:231MekelleEthiopia School of Earth Sciences Addis Ababa UniversityP.O.Box:1176Addis AbabaEthiopia Department of Earth Environmental and Planetary SciencesCase Western Reserve UniversityClevelandOHUSA Faculty of Mines Aksum UniversityP.O.Box:1010AksumEthiopia

The Tahtai Logomiti area is characterized by metavolcanic and metavolcaniclastic interbedded with clastic and carbonate metasedimentary rocks of Neoproterozoic *** geological,petrographic,major,and trace elements data were used to evaluate the metamorphism,petrogenesis,and paleo-tectonic setting of the *** field and petrographic observation indicate that the area has undergone greenschist facies *** on mineralogy and geochemical attributes,these metavolcanic rocks are classified as basalt,basaltic-andesite,andesite,and *** moderate degrees of light rare earth element(LREE)enrichment,flat heavy rare earth element(HREE)pattern,and low Nb/Y ratio,represent shallow mantle *** addition to that,the Tio_(2)/Yb ***/Yb diagram,high(La/Yb)N ratio(>3.44),indicates shallow melting and depleted magma ***,the high ratios of(Th/Ta)>3.8,(La/Ta)>38,and low ratios of(Th/La)pb content would indicate crustal contamination of the *** discrimination diagram and trace element ratios(Nb/Y,La/Sc,La/Y,and La/Th)indicate that the metavolcanic rocks have a calc-alkaline *** addition,the ZrNb-Y and Th-Hf-Ta plots show that the rocks formed under a volcanic-arc *** general petrological and geochemical characteristics of the Tahtai Logomiti metavolcanic rocks suggest that the area is associated with subduction-related arc accretion of the Arabian Nubian Shield.

关键词： Deformation Metamorphism Foliation Calc-alkaline Neoproterozoic Arabian Nubian Shield

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Alkaline igneous rocks,a potential source of rare metals and radioactive minerals:Case study at Amreit area,south Eastern Desert,Egypt

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Acta Geochimica 2025年第1期44卷 189-214页

作者： Baaha M.Emad Nuclear Materials Authority El MaadiP.O.Box:530CairoEgypt

Alkaline igneous rocks represent one of the most economically important resources of radioactive minerals and rare *** field observations and petrographic studies are integrated with whole-rock geochemical analyses and Gamma ray spectroscopy data of alkaline rocks associated with the Amreit *** fieldwork was achieved by the collection of more than forty samples from alkaline granites and alkaline *** youngest rocks cropping out in the study area are the cogenetic alkaline rocks,ranging from alkaline granite to alkaline *** alkaline rocks are composed essentially of K-feldspar,alkali amphiboles(arfvedsonite),and sodic pyroxene,with accessories such as zircon,apatite,and *** characterization of the highly radioactive zones in both alkaline granite and alkaline syenite displays enrichment in monazite,thorite,zircon,ferro-columbite,xenotime,and allanite *** analyses indicate that the Amreit rocks are alkaline with peralkaline affinity and have high concentrations of total alkalis(K_(2)o+Na_(2)o),large ion lithophile elements(LILEs;Ba and Rb),high field strength elements(HFSEs;Y,Zr and Nb),rare earth elements(REEs)and significantly depleted in K,Sr,p,Ti,and Eu,typically of post-collision A-type ***,the Amreit alkaline igneous rocks are classified as within plate granites and display A2 subtype *** fractionation of K-feldspars played a distinctive role during the magmatic evolution of these alkaline *** geochemical characteristics indicate that the studied alkaline igneous rocks which were originated by fractional crystallization of alkaline magmas were responsible for the enrichment of the REE and rare metals in the residual *** high radioactivity is essentially related to accessory minerals,such as zircon,allanite,and *** alkaline granite is the most U-and Thrich rock,where radioactivity level reaches up to 14.7 ppm(181.55 Bq/kg)e U,40.6 ppm(164.84 Bq/kg)e

关键词： Amreit area Alkaline rocks Radioactivity Geochemistry post-collision A-type granite Egypt

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Analysis of Linear and Nonlinear Vibrations of Composite Rectangular Sandwich plates with Lattice Cores

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Computers, Materials & Continua 2025年第1期82卷 223-257页

作者： Alireza Moradi Alireza Shaterzadeh Faculty of Mechanical Engineering Shahrood University of TechnologyShahroodP.O.Box ***Iran

For the first time,the linear and nonlinear vibrations of composite rectangular sandwich plates with various geometric patterns of lattice core have been analytically examined in this *** plate comprises a lattice core located in the middle and several homogeneous orthotropic layers that are symmetrical relative to *** this purpose,the partial differential equations of motion have been derived based on the first-order shear deformation theory,employing Hamilton’s principle and Von Kármán’s nonlinear displacement-strain ***,the nonlinear partial differential equations of the plate are converted into a time-dependent nonlinear ordinary differential equation(Duffing equation)by applying the Galerkin *** the solution of this equation,the natural frequencies are ***,to calculate the non-linear frequencies of the plate,the non-linear equation of the plate has been solved analytically using the method of multiple ***,the effect of some critical parameters of the system,such as the thickness,height,and different angles of the stiffeners on the linear and nonlinear frequencies,has been analyzed in *** confirmthe solution method,the results of this research have been compared with the reported results in the literature and finite elements in ABAQUS,and a perfect match is *** results reveal that the geometry and configuration of core ribs strongly affect the natural frequencies of the plate.

关键词： Free vibration composite sandwich plate lattice core galerkin method Duffing equation multiple scales method

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on the Sense of Convergence in the Dyadic Representation Theorem

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Acta Mathematica Sinica,English Series 2025年第1期41卷 472-496页

作者： Tuomas Hytonen Department of Mathematics and Systems Analysis Aalto UniversityP.O.Box 11100FI-00076 AaltoFinland Department of Mathematics and Statistics University of HelsinkiP.O.Box 68FI-00014 University of HelsinkiFinland

The dyadic representation of any singular integral operator,as an average of dyadic model operators,has found many *** for many purposes it is enough to have such a representation for a“suitable class”of test functions,we show that,under quite general assumptions(essentially minimal ones to make sense of the formula),the representation is actually valid for all pairs(f,g)∈L^(p)(R^(d))×L^(p')(R^(d)),not just test functions.

关键词： Singular integral dyadic shift

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Continuous-flow columns packed with zero-valent iron and iron sulfide as a feasible strategy to remediate the persistent contaminant nitroguanidine

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Defence Technology(防务技术) 2025年第1期43卷 26-34页

作者： Youngjae Yu Erika E.Rios-Valenciana Robert A.Root Reyes Sierra-Alvarez Jon Chorover Jim A.Field Department of Chemical and Environmental Engineering The University of ArizonaP.O.Box 210011TucsonAZ 85721USA Department of Environmental Science The University of ArizonaTucsonAZ 85721USA

The insensitive munitions compound nitroguanidine(NQ)is used by the *** to avoid unintended ***,NQ also represents an emerging contaminant whose environmental emissions can cause toxicity toward aquatic organisms,indicating the need for effective remediation ***,we investigated the feasibility of treating water contaminated with NQ in continuous-flow columns packed with zero-valent iron(ZVI)or iron sulfide(FeS).Initially,the impact of pH on NQ transformation by ZVI or FeS was evaluated in batch *** pseudo first-order rate constant for NQ transformation(k_(1,NQ))by ZVI was 8-10 times higher at pH 3.0 compared to pH 5.5 and 7.0,whereas similar k_(1,NQ)values were obtained for FeS at pH *** on these findings,the influent p H fed to the ZVIand Fe S-packed columns was adjusted to 3.0 and 5.5,*** reactors transformed NQ into nitrosoguanidine(Nso Q).Further transformation of Nso Q by ZVI produced aminoguanidine,guanidine,and cyanamide,whereas Nso Q transformation by Fe S produced guanidine,ammonium,and traces of *** outperformed Fe S as a reactive material to remove *** ZVI-packed column effectively removed NQ below detection even after 45 d of operation(490 pore volumes,pV).In contrast,NQ breakthrough(removal efficiencyobserved after 18 d(180 pV)in the Fe S-packed *** high NQ removal efficiency and long service life of the ZVI-packed column(>490 pV)suggest that the technology is a promising approach for NQ treatment in packed-bed reactors and in situ remediation.

关键词： Continuous water treatment Iron-based minerals Chemical reduction pH Aminoguanidine Guanidine

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Iron-promoted zirconia-alumina supported Ni catalyst for highly efficient and cost-effective hydrogen production via dry reforming of methane

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Journal of Environmental Sciences 2025年第2期148卷 274-282页

作者： Ahmed S.Al-Fatesh Naitik patel Vijay Kumar Srivastava Ahmed I.osman David W.Rooney Anis H.Fakeeha Ahmed E.Abasaeed Mohammed F.Alotibi Rawesh Kumar Chemical Engineering Department College of EngineeringKing Saud UniversityP.O.Box 800Riyadh 11421Saudi Arabia Department of Chemistry Indus UniversityAhmedabadGujarat 382115India School of Chemistry and Chemical Engineering Queen’s University BelfastBelfast BT95AGNorthern IrelandUK Institute of Refining and petrochemicals Technologies King Abdulaziz City for Science and Technology(KACST)P.O.Box 6086Riyadh 11442Kingdom of Saudi Arabia

Developing cost-effective and high-performance catalyst systems for dry reforming of methane(DRM)is crucial for producing hydrogen(H_(2))***,we investigate using iron(Fe)as a promoter and major alumina support in Ni-based catalysts to improve their DRM *** addition of iron as a promotor was found to add reducible iron species along with reducible Nio species,enhance the basicity and induce the deposition of oxidizable *** incorporating 1 wt.%Fe into a 5Ni/10ZrAl catalyst,a higher Co_(2) interaction and formation of reducible"Nio-species having strong interaction with support"was observed,which led to an∼80%H_(2) yield in 420 min of Time on Stream(ToS).Further increasing the Fe content to 2 wt.%led to the formation of additional reducible iron oxide species and a noticeable rise in H_(2) yield up to 84%.Despite the severe weight loss on Fe-promoted catalysts,high H_(2) yield was maintained due to the proper balance between the rate of CH_(4) decomposition and the rate of carbon deposit ***,incorporating 3 wt.%Fe into the 5Ni/10ZrAl catalyst resulted in the highest Co_(2) interaction,wide presence of reducible Nio-species,minimumgraphitic deposit and an 87%H_(2) *** findings suggest that ironpromoted zirconia-alumina-supported Ni catalysts can be a cheap and excellent catalytic system for H_(2) production via DRM.

关键词： Dry reforming of methane Coke resistant Hydrogen production Cheap catalyst Fe-promoted catalyst

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An Enhanced Lung Cancer Detection Approach Using Dual-Model Deep Learning Technique

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Computer Modeling in Engineering & Sciences 2025年第1期142卷 835-867页

作者： Sumaia Mohamed Elhassan Saad Mohamed Darwish Saleh Mesbah Elkaffas Department of Information Technology Institute of Graduate Studies and ResearchAlexandria UniversityAlexandria21526Egypt College of Computing and Information Technology Arab Academy for ScienceTechnology and Maritime TransportAlexandriaP.O.Box 1029Egypt

Lung cancer continues to be a leading cause of cancer-related deaths worldwide,emphasizing the critical need for improved diagnostic *** detection of lung tumors significantly increases the chances of successful treatment and ***,current diagnostic methods often fail to detect tumors at an early stage or to accurately pinpoint their location within the lung ***-model deep learning technologies for lung cancer detection,while beneficial,cannot capture the full range of features present in medical imaging data,leading to incomplete or inaccurate ***,it may not be robust enough to handle the wide variability in medical images due to different imaging conditions,patient anatomy,and tumor *** overcome these disadvantages,dual-model or multi-model approaches can be *** research focuses on enhancing the detection of lung cancer by utilizing a combination of two learning models:a Convolutional Neural Network(CNN)for categorization and the You only Look once(YoLov8)architecture for real-time identification and pinpointing of *** automatically learn to extract hierarchical features from raw image data,capturing patterns such as edges,textures,and complex structures that are crucial for identifying lung ***8 incorporates multiscale feature extraction,enabling the detection of tumors of varying sizes and scales within a single *** is particularly beneficial for identifying small or irregularly shaped tumors that may be challenging to ***,through the utilization of cutting-edge data augmentation methods,such as Deep Convolutional Generative Adversarial Networks(DCGAN),the suggested approach can handle the issue of limited data and boost the models’ability to learn from diverse and comprehensive *** combined method not only improved accuracy and localization but also ensured efficient real-time processing,which is crucial for practical clinical applicati

关键词： Lung cancer detection dual-model deep learning technique data augmentation CNN YoLov8

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Tunable and wideband high-performance rare earth-doped Ni-Mg-Cu-Zn nano ferrite-based meta-absorbers for C-band application

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Journal of Rare Earths 2025年第1期43卷 124-132,I0005页

作者： Majid Niaz Akhtar Magbool Alelyani Fatimah Mohammed AAlzahrani Abdullah Almohammedi Sabih Qamar MABaqir MIrfan Muhammad Azhar Khan Kheir SAlbarkaty ZAAlrowaili MSAl-Buriahi Institute of physics The Islamia University of Bahawalpur63100BahawalpurPakistan Department of Radiological Sciences College of Applied Medical ScienceKing Khalid University61421bhaSaudi Arabia Department of Chemistry College of SciencePrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabi Department of physics Faculty of ScienceIslamic University of Madinah42352.Saudi Arabia Department of Chemical Engineering Muhammad Nawaz Sharif University of Engineering and Technology(MNSUET)60000MultanPakistan Department of Electrical and Computer Engineering COMSATS University IslamabadSahiwal Campus57000Pakistan Department of physics Umm Al-Qura UniversityMakkah24382Saudi Arabia Department of physics College of ScienceJouf UniversityP.O.Box:201474331SakakaSoudi Arabia Department of physics Sakarya University6900SakaryaTurkey

Due to advanced technology,electromagnet interference and dissipation problems in the electronic and portable devices at GHz range are increasing *** absorbing materials with outstanding electromagnetic properties,wide bandwidth,and strong absorption are highly *** present investigation deals with the preparation of Ni-Mg-Cu-Zn(NMCZ)substituted nano ferrites with composition of Ni_(0.3)Mg_(0.2)Cu_(0.3)Zn_(0.2)X_(0.02)Fe_(1.98)o_(4)(X=Nd,Ho,pr,Gd,Yb).X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FTIR),field emission scanning electron microscopy(FESEM),transmission electron microscopy(TEM),a vibratory sample magnetometer(VSM),and a Vector network analyzer(VNA)were used to investigate these rare earth-doped nanocrystalline ferrites'*** reveals the single spinel phase structure in all Ni-Mg-Cu-Zn *** spectroscopy shows the presence of tetrahedral and octahedral bands of spinel *** images reveal the lowest agglomeration for the Ho-doped NMCZ nano-spinel ferrites *** images show the hexagon shapes of the Yb-and Nd-doped NMCZ ***-doped NMCZ ferrites show more coercivity than other rare earth metals substituted NMCZ nanocrystalline *** analysis was used to calculate the magnetic features like initial permeability,magnetic anisotropy constant,remanence,coercivity,and magnetic ***-frequency switching field distributions(SFD)analyses were also *** characteristics such as losses,permittivity,modulus,Q,ac conductivity,and impedance of the Nd^(-),Ho^(-),pr^(-),Gd^(-),Yb-doped Ni-Mg-Cu-Zn ferrites were *** minimum reflection loss(-57.3 dB)is found at 1.4 GHz for pr-doped Ni-Mg-Cu-Zn ferrite ***,the reflection loss(RL)of-53.9 dB at 2.9 GHz is observed for Ho-doped Ni-Mg-Cu-Zn ferrite *** magnetization,low coercivity,outstanding magnetodielectric,and absorption properties of theNd^(-),Ho^(-),pr^(-),Gd^(-)and Yb^(-)doped Ni-Mg

关键词： Rare earths Reflection loss Cubic phase Magnetodielectric Ni-Mg-Cu-Zn(NMCZ)meta-absorber

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Rosa moschata ameliorates haloperidol-induced parkinson's disease via reduction of neurodegeneration and oxidative stress

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Asian pacific Journal of Tropical Biomedicine 2025年第1期15卷 24-33,I0013-I0015页

作者： Badriyah S.Alotaibi Uzma Saleem Maryam Farrukh Zunera Chaudhary Nabia Anwar Ifat Alsharif Abdullah R.Alanzi Tasahil S.Albishi Fatima A.Jaber Wedad Saeed Al-Qahtani Muhammad Ajmal Shah Department of pharmaceutical Sciences College of PharmacyPrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh 11671Saudi Arabia punjab University College of pharmacy University of the PunjabLahore-54000Pakistan Department of pharmacology Faculty of Pharmaceutical SciencesGovt.College UniversityFaisalabad-38000Pakistan Department of Biology Jamoum University CollegeUmm Al-Qura University-21955 MakkahSaudi Arabia Department of pharmacognosy College of PharmacyKing Saud UniversityRiyadh-11451Saudi Arabia Department of Biology College of SciencesUmm Al-Qura UniversityMakkahSaudi Arabia Department of Biological Sciences College of ScienceUniversity of JeddahJeddah 21589Saudi Arabia Department of Forensic Sciences College of Criminal JusticeNaif Arab University for Security SciencesP.O.Box 6830Riyadh 11452Saudi Arabia Department of pharmacy Hazara UniversityMansehra-21300Pakistan

objective:To investigate the effect of Rosa moschata(***)extract on haloperidol-induced parkinson’s disease(pD)in ***:Haloperidol(1 mg/kg)was given to rats intraperitoneally for 3 weeks for induction of *** extract(150,300 and 600 mg/kg)was administered orally for 21 *** neuroprotective role of *** leaf extract in pD was explored by performing neurobehavioral tests and RT-pCR analysis and measuring neurotransmitters and oxidative stress ***:An improvement in motor functions and muscle strength was observed in pD rats treated with *** *** levels of dopamine,serotonin,noradrenaline,superoxide dismutase,catalase,glutathione,and superoxide dismutase were significantly increased(polinesterase and malondialdehyde levels were markedly decreased by treatment with *** extract(po markedly downregulated the mRNA expressions of IL-1β,α-synuclein,IL-1α,and TNF-αin brain ***,histopathological analysis indicated that neurofibrillary tangles and plaques were noticeably decreased in a dose-dependent manner in pD rats treated with *** ***:*** extract alleviates haloperidol-induced pD in rats by reducing oxidative stress and *** may be used for management and treatment of *** additional studies are required to confirm its efficacy and molecular mechanisms.

关键词： parkinson’s disease Rosa moschata Neurotransmitter,α-Synuclein Haloperidol Neurodegeneration

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Facilitated water dissociation by coupling bimetallic phosphide with manganese oxide to enhance alkaline hydrogen evolution

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Nano Research 2025年第2期18卷 184-192页

作者： Xiaolan Tang Na Yang Zixiao Li Xun He Qiuying Dai Hefeng Wang Yongchao Yao Yujie Yuan Hong Tang Dongdong Zheng Shengjun Sun Asmaa Farouk Mohamed S.Hamdy Xiaobin Niu Tingshuai Li Xuping Sun Bo Tang School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731China College of Chemistry Chemical Engineering and Materials ScienceShandong Normal UniversityJinan 250014China Center for High Altitude Medicine West China HospitalSichuan UniversityChengdu 610041China Department of Chemistry College of ScienceKing Khalid UniversityP.O.Box 900461413 AbhaSaudi Arabia Laoshan Laboratory Qingdao 266237China

Fabricating catalysts with efficient water dissociation and robust stability is key to advancing the industrialization of the alkaline hydrogen evolution reaction(HER).Establishing an effective phosphide/oxide interface is a feasible way to improve the HER performance of the catalyst in an alkaline medium,but it remains ***,we adopt that manganese oxide nanoparticles decorated on nickel-cobalt phosphide nanowire array on nickel foam(Mno_(x)@NiCop/NF)via a surface modification strategy that shifts the d-band center downward,promoting the water dissociation and hydrogen intermediate ***,Mno_(x) makes the surface of NiCop rougher,facilitating bubble release and improving the array ***,Mno_(x)@NiCop/NF achieves industrial current densities of 500 and 1000 mA·cm^(-2) with overpotentials of 171 and 193 mV,respectively,while maintaining stable operation for over 600 h at 1000 mA·cm^(-2) in 1 M ***,an anion exchange membrane electrolyzer with the catalyst was fabricated and shows potential for practical applications.

关键词： manganese oxide bimetallic phosphides heterojunction hydrogen evolution reaction water electrolysis

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