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Chinese Journal Of Geochem.stry 2007年第4期26卷 333-344页

作者： gehad m. saleh Nuclear m.terials Authority P.O.Box: 530 El Maadi Egypt

The field relations, m.neralogy, and m.jor and trace elem.nts (including REE analyses of whole-rock sam.les and m.nerals) of granites and their associated m.lybdenite + uranium.m.neralized aplites in Southeastern Desert, Egypt, have been studied. The granites are leucocratic and m.stly peralum.nous in nature with m.scovite increasing at the expense of biotite. The chem.cal and m.neralogical characteristics of the granitic rocks indicate that their m.lts originated from.the LILE-enriched m.ntle wedge by partial m.lting and are contam.nated by crustal m.lts, followed by therm.gravitational processes. Leucogranites with higher Na2O/K2O ratios from.Um.Dargag and Um.m.iat crystallized under H2O-saturated equilibrium.conditions in which the exsolved vapor continuously m.grated away. The REE patterns of the granites studied are characterized by LREE enrichm.nts and negative Eu anom.lies. In com.arison, the potassic aplites and the m.re sodic leucogranites are depleted in LREE, enriched in HREE and show m.re rem.rkable negative Eu anom.lies. Allanite and m.nazite are the m.st im.ortant REE carriers in the granites. These m.nerals are strongly enriched in LREE, whereas fluorite and xenotim., which are m.re abundant in the aplites, are enriched in HREE. The average Lu/Ce ratio represents the fractionation trend with respect to HREE. It is 0.71 for radioactive fluorite, and it increases to 1.22 for non-radioactive fluorite. The high REE contents of m.lybdenite represent re-deposition of the m.bilized m. and REE. Due to the strong control of accessory m.nerals, the REEs are of lim.ted use in petrogenetic m.delling of highly evolved granitic system..

关键词：辉钼矿稀土资源褐帘石独居石西南地区沙漠地带埃及

URANIUm.m.NERALIZATION IN THE m.SCOVITE-RICH GRANITES OF THE SHALATIN REGION, SOUTHEASTERN DESERT, EGYPT

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Chinese Journal Of Geochem.stry 2006年第1期25卷 1-15页

作者： gehad m. saleh NUCLEAR m.TERIALS AUTHORITY P.O.BOX: 530 EL MAADI CAIRO EGYPT

The younger granitoids of the Shalatin district in the Southeastern Desert of Egypt, are of biotite and two-m.ca granite com.ositions. The geochem.stry of rare-earth elem.nts (REE), yttrium. thorium.and uranium.form. the basis for m.ny im.ortant m.thods to reconstruct igneous petrogenesis. Since the recognition that REE, Y, Th, U-rich accessories m.y play an im.ortant role in controlling the geochem.stry of crustal m.lts, a considerable am.unt of work has been done in an attem.t to understand their effects. However, this effort has been alm.st exclusively focused on three m.nerals: zircon, m.nazite and apatite. Nevertheless, the variety of REE-Th-U-rich accessories in granite rocks are neither lim.ted to these three m.nerals nor are they always the m.in REE, Y, Th carriers. The geochem.stry of REE, Y, Th and U reflects the behavior of accessories and som. key m.jor m.nerals such as garnet and feldspars, and m.y therefore give valuable inform.tion about the conditions of partial m.lting, m.lt segregation and crystallization of granite m.gm.s in different crustal regim.s. The geochem.stry of U and Th during m.gm.tic differentiation has been studied in m.ny granites from.different areas and it has been known that the U and Th contents of granitic rocks generally increase during differentiation, although in som. cases they decrease. The Th/U ratio can either increase or decrease, depending on redox conditions, the volatile content or alteration by endogene or supergene solutions. The accessory assem.lage of m.scovite-rich granites and high-grade rocks is com.osed of m.nazite, xenotim., apatite, Th-orthosilicate, secondary U-m.neralization and betafite-pyrochlore. REE, Y, Th and U are not suitable for geochem.cal m.deling of granitoids by m.ans of equilibrium.based trace elem.nt fractionation equations, but are still useful petrogenetic tools.

关键词：铀矿化作用稀土元素花岗岩沙漠埃及

Geologic relationships and m.neralization of peralkaline/alkaline granite-syenite of the Zargat Na’am.ring com.lex, Southeastern Desert, Egypt

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Chinese Journal Of Geochem.stry 2006年第2期25卷 97-111页

作者： gehad m. saleh Nuclear m.terials Authority P.O. Box: 530 EL Maadi Cairo Egypt

The Zargat Na’am.ring com.lex crops out 90 km.NW of Shalatin City in the Southeastern Desert of Egypt. The ring com.lex form. a prom.nent ridge standing high above the surrounding m.fic-ultram.fic hills. It is cut by two sets of joints and faults which strike predom.nantly NNW-SSE and E-W, and is injected by dikes, porphyritic alkaline syenites, and felsite porphyries. It consists of alkali syenites, alkali quartz syenites, and peralkaline arfvedsonite-bearing granitic and pegm.titic dikes and sills. The com.lex is characterized locally by extrem. enrichm.nts in REEs, wolfram.te and rare, high field strength m.tals (HFSm., such as Zr and Nb. The highest concentrations ({1.5} wt% Zr, {0.25} wt% Nb, {0.6} wt% ∑REEs) occur in aegirine-albite aplites that form.d around arfvedsonite pegm.tites. Quartz-hosted m.lt inclusions in arfvedsonite granite and pegm.tite provide unequivocal evidence that the peralkaline com.ositions and rare m.tal enrichm.nts are prim.ry m.gm.tic features. Glass inclusions in quartz crystals also have high concentrations of incom.atible trace elem.nts including Nb (750×10+{-6}), Zr (2500×10+{-6}) and REEs (1450×10+{-6}). The REEs, Nb and Zr com.ositions of the aegirine-albite aplites plot along the sam. linear enrichm.nt trends as the m.lt inclusions, and Y/Ho ratios m.stly display unfractionated, near-chondritic values. The chem.cal and textural features of the aegirine-albite aplites are apparently resultant from.rapid crystallization after volatile loss from.a residual peralkaline granitic m.lt sim.lar in com.osition to the m.lt inclusions.

关键词：花岗岩埃及矿化作用地质条件

The chrom.te deposits associated with ophiolite com.lexes, Southeastern Desert, Egypt: Petrological and geochem.cal characteristics and m.neralization

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Chinese Journal Of Geochem.stry 2006年第4期25卷 307-317页

作者： gehad m. saleh Nuclear m.terials Authority P.O.Box: 530 El Maadi Cairo Egypt

The podiform.chrom.tites occur in a well-preserved m.ntle sequence consisting of lherzolite-harzburgite with abundant lenses of olivine dunite. The podiform.chrom.tite deposits are com.on as sm.ll and irregularly shaped m.sses in the Southeastern Desert (SED) of Egypt. The podiform.chrom.tites exhibit a wide range of com.ositions from.high Cr to high Al varieties. The Cr of chrom. spinel ranges from.0.67 to 0.88 in olivine-dunite, quite sim.lar to that of the high-Cr chrom.tite, whereas it is around 0.62 in lherzolite-harzburgite. Prim.ry hydrous m.neral inclusions, am.hibole and phlogopite, in chrom. spinel have been reported for the first tim. from.the Pan-African Proterozoic podiform.chrom.tites. On the other hand, petrographic and geochem.cal evidence suggests that podiform.chrom.tites in the SED of Egypt were form.d as a result of crystallization of m.fic m.lts, probably of boninitic com.osition, the boninitic parental m.gm.s were probably produced by a second stage of m.lting above a subduction zone. Three types of chrom.te ores can be distinguished within the SED of Egypt: (a) sulphide-poor podiform.ores; (b) brecciated ores; and (c) sulphide-rich ores. Two textural types of inclusions in chrom.te are distinguished: (1) prim.ry silicate inclusions generally have high m.-num.er (>96), Cr and Ni, and are dom.nated by pargasitic am.hibole, forsterite, diopside, enstatite and Na-phlogopite. A diversity of prim.ry and secondary platinum.group m.nerals (PGm. is described from.the chrom.tites, including alloys, sulphides, sulpharsenides and arsenides of Ru, Os, Ir, Rh, Ni, Cu, Fe and Co; (2) in addition to prim.ry PGm.and hydrous silicates, the fluids are of low to m.derate salinity, sodium.dom.nated aqueous solutions with com.lex gas contents. Variable am.unts of water, hydrogen, hydrocarbons, carbon dioxides and nitrogen have been determ.ned in inclusion-rich sam.les. The chondrite-norm.lized PGE patterns of lherzolite-harzburgite and olivine-dunite have negative

关键词：铬铁矿沉淀蛇绿岩复合物东南沙漠埃及岩石学

Geochem.cal characteristics and spectrom.tric prospecting in the m.scovite-bearing pegm.tites and granites, southeastern Aswan, Egypt

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Chinese Journal Of Geochem.stry 2008年第1期27卷 9-20页

作者： gehad m. saleh m.ham.d m. El Galy m.ham.d A. Obeid Nuclear m.terials Authority P.O.Box: 530 El Maadi Cairo Egypt Geology Depart. Faculty of Science El Fayoum University Egypt

Rare m.tal m.neralization of Sn, Nb-Ta and W is encountered in the Gebel Dihm.t area (GDA), south- eastern Aswan, Egypt. The m.neralization is related to m.scovite granites and their pegm.tite derivatives. The peg- m.tites are divided into three types according to their m.in m.neral assem.lages: K-feldspar-m.scovite-tourm.line, K-feldspar-albite-m.scovite and albite-K-feldspar-lepidolite veins. Petrogenetic studies indicate that Sn and Nb-Ta m.neralization extends from.the late-m.gm.tic stage to the pegm.tite and hydrotherm.l stages of the (GDA) suite. The albite-K-feldspar-lepidolite granite is com.osed dom.nantly of albite, lepidolote, and quartz, with topaz, K-feldspar and am.lygonite. The accessory m.nerals are zircon, m.nazite, pollucite, colum.ite-tantalite, m.crolite and Ta-rich cassiterite. Phenocrysts of quartz, topaz and K-feldspar contain abundant inclusions of albite laths and occasional lepidolite crystals along growth zones (snowball texture), indicating sim.ltaneous crystallization from.a subsolvus, residual m.gm.. The origin of the pegm.tites is attributed to extrem. differentiation by fractional crystal- lization of a granitic m.gm.. The econom.c potential for rare m.tals was evaluated in the geochem.cal discrim.nation diagram.. Accordingly, som. of the pegm.tites are not only highly differentiated in term. of alkalis, but also the prom.sing targets for sm.ll-scale Ta and, to a less extent, Sn. The pegm.tites also provide the first exam.le of Fe-m. and Nb-Ta fractionation in successive generations of granites to cassiterite-bearing pegm.tites, which perfectly ex- hibit sim.lar fractionation trends established for prim.ry colum.ite-tantalite in the corresponding categories of peg- m.tites. Uranium.and Th of m.gm.tic origin are indicated by the presence of thorite and allanite, whereas evidence of hydrotherm.l m.neralization is the alteration of rock- foring m.nerals such as feldspar and the form.tion of sec- ondary m.nerals such as uranophane..

关键词：地理特征光谱测定法白云母岩石

Geochem.stry of lam.rophyres associated with uranium.m.neralization, Southeastern Desert, Egypt

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Chinese Journal Of Geochem.stry 2007年第4期26卷 356-365页

作者： m.ham.d E. Ibrahim.m.ham.d m. El-Tokhi gehad m. saleh m.m.ouh A. Hassan m.ham.d A. Rashed Nuclear m.terials Authority P. O. Box 530 El Maadi Cairo Egypt Geology Deprtm.nt Faculty of Science United Arab Emirates University United Arab Emirates

Two brecciated shear zones (NNW-SSE) are found crosscutting cataclastic rocks. The cataclastic rocks (3.0 km.) occupy the core of the granitic pluton and enclose a roof pendant of m.fic-ultram.fic rocks. The NNW-SSE-extending lam.rophyre dykes vary in thickness from.0.5 m.to 1 m.and up to 800 m.long, cutting the cataclastic rocks and are com.osed m.inly of plagioclases, am.hiboles, relics of pyroxenes and K-feldspar phenocrysts em.edded in fine-grained groundm.ss. They are characterized as being peralum.nous, calc-alkaline in com.osition (chem.cal trap) and enriched in calcite, sulfide and P2O5. The lam.rophyres were affected by hydrotherm.l alteration (chlorite-carbonate alteration) while the cataclastic rocks were affected by diagenetic alteration (K-feldspar-albite alteration). Uranium.m.neralization is the product of hydrotherm.l events and has been investigated by X-ray diffraction (XRD) and environm.ntal scanning electron m.croscopy (ESEm., involving prim.ry uranium.m.nerals (U3O8) and secondary uranium.m.nerals (uranophane and beta-uranophane, kasolite, torbernite, autonite and m.ta-autonite) in addition to U- bearing m.nerals (astrocyanite, betafite and fergusonite). The presence of different m.neral parageneses associated with clay m.nerals indicates that the lam.rophyres were subjected to acidic and alkaline m.neralizing solutions. m.reover, the U-Zr/U, U-Ce/U values show negative correlations, confirm.ng U-enrichm.nt in both cataclastic rocks and shear zones while the Th-eU/eTh, Th-Zr/Th and Th-Ce/Th values show negative correlations, indicating that the U-bearing solutions are rich in Th in the cataclastic rocks only.

关键词：碎裂岩石剪切区域煌斑岩热液蚀变埃及西南地区沙漠地带

Blockchain for secure and decentralized artificial intelligence in cybersecurity: A com.rehensive review

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Blockchain(Research and Applications) 2024年第3期5卷 184-208页

作者： Ahm.d m.Sham.an saleh Departm.nt of Inform.tion Technology University of TabukTabuk47512Saudi Arabia

As the use of artificial intelligence (AI) grows within the field of cybersecurity, so does the dem.nd for secure and decentralized AI system. to protect against potential cyber threats. Blockchain technology has em.rged as the ideal approach for increasing both the security and privacy of AI system. since it provides decentralized and im.utable data storage. This system.tic literature review focuses on the integration of blockchain technology with decentralized AI within cybersecurity. It provides a com.rehensive taxonom. of blockchain technology and decentralized AI for cybersecurity, serving as the starting point for the study. This paper begins with an overview of blockchain technology and its possible uses in cybersecurity and also analyzes its challenges and opportunities. Decentralized AI is also covered in the study, along with its potential advantages and difficulties in decentralized AI cybersecurity. Building on that foundation, this study provides convincing findings highlighting the beneficial relationships between blockchain technology and decentralized AI for cybersecurity, contributing to a nuanced com.rehension of their integration. m.reover, it offers real-world uses of blockchain-enabled, decentralized AI to discuss its usefulness in tackling cybersecurity concerns. Finally, this paper discusses future research directions for blockchain-enabled decentralized AI in cybersecurity, including potential applications and im.lications of this technology in the field, em.hasizing the potential of blockchain-enabled decentralized AI in cybersecurity to enhance security, privacy, and trust in AI system..

关键词： Blockchain Artificial intelligence Decentralized Cybersecurity

The Protective Effect of m.ringa oleifera Leaves Extract on Paracetam.l Hepatotoxicity in m.le Rats

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Journal of Biom.dical Science and Engineering 2024年第3期17卷 72-82页

作者： Reham.m. Al-Sultan Noorah saleh Al-Sowayan Departm.nt of Biology College of Science Qassim University Buraydah Saudi Arabia

In recent years, there has been an increase in concern regarding the effects of paracetam.l poisoning on liver tissues, particularly when consum.d in large am.unts. Som. studies have estim.ted that paracetam.l is involved in 56% of acute liver diseases, whereas 0.4% of paracetam.l overdose cases result in fatal-ity. In this study, the effects of m.ringa oleifera on paracetam.l toxicity in the liver were explored. It has been dem.nstrated that m.ringa oleifera is highly nu-tritious, contains bioactive m.lecules, and is therapeutically beneficial. m.ny studies have shown that m.ringa oleifera leaves possess a wide range of biologi-cal properties, including antioxidant, tissue protection, analgesic, antihyperten-sive, and im.unom.dulatory activities. This study highlights the protective role of m.ringa oleifera on handling possible paracetam.l hepatotoxicity in m.le rats. .

关键词： m.ringa oleifera Paracetam.l Hepatotoxicity Oxidative Stress

Influence of erbium.on structural,and charged particles,photons,and neutrons shielding properties of Ba_(1-x)Er_(x)SnO_(3) perovskite ceram.cs

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Journal of Rare Earths 2024年第4期42卷 724-732页

作者： m.K.h.Ham.d Nidal Dwaikat m.H.A.m.areb m.I.Sayyed R.m.Ham.d Y.S.m.Alajeram. m.A.Alm.ssiere Gam.el saleh Ahm.d Hussein Alom.ri K.A.Ziq Departm.nt of Basic Sciences School of Social and Basics SciencesAl Hussein Technical UniversityKing Abdullah II St 242Amman11831Jordan Departm.nt of Physics College of Engineering and PhysicsInterdisciplinary Research Center for Advanced MaterialsKing Fahd University of Petroleum&MineralsDhahran31261Saudi Arabia Departm.nt of Physics College of ScienceImam Abdulrahman Bin Faisal UniversityP.O.Box 1982Dammam31441Saudi Arabia Basic and Applied Scientific Research Center Imam Abdulrahman Bin Faisal UniversityP0.Box 1982Dammam31441Saudi Arabia Departm.nt of Physics Faculty of ScienceIsra UniversityAmman11622Jordan Departm.nt of Nuclear m.dicine Research Institute for Research and Medical Consultations(IRMC)Imam Abdulrahman Bin Faisal UniversityPo.Box 1982Dammam31441Saudi Arabia m.dical Im.ging Departm.nt Applied Medical Sciences FacultyAl Azhar University-Gaza CityPo.Box 1277Palestine Departm.nt of Biophysics Institute for Research and Medical Consultations(IRMC)Imam Abdulrahman Bin Faisal UniversityPo.Box1982Dammam 31441Saudi Arabia Departm.nt of Biom.dical Engineering College of EngineeringImam Abdulrahman Bin Faisal UniversityPo.Box 1982Dammam31441Saudi Energy&m.nerals Regulatory Com.ission Amman11821Jordan

Five perovskite ceram.cs sam.les of Ba_(1-x)Er_(x)SnO_(3) with x=0.00,0.05,0.10,0.15,and 0.20 were synthesized using the conventional solid-state reaction *** prepared sam.les were characterized by X-ray diffraction(XRD),Fourier transform. infrared(FTIR),and UV-Vis *** shielding properties against ionizing radiation were also *** XRD analysis shows the perovskite cubic structure as the m.jor phase in all *** FTIR reveals a distinctive band around 614-620 cm.(-1) ascribed to the antisym.etric O-Sn-O ***-Vis spectroscopy was used to determ.ne the bandgap according to diffuse reflectance,and the results display a fixed enhancem.nt in the bandgap from.3.2 to 3.3 eV for all ***-ray shielding properties of the synthesized sam.les were experim.ntally m.asured and com.ared with XCOm.com.utational *** relative differences(Δ,%)between experim.ntal and theo retical values are low and fall within the 0.446%-7.10%*** addition of Er leads to the enhanced density,neutron,and gam.a shielding *** contrast,charged particles’shielding param.ters gradually reduce with rising Er *** results suggest that Ba_(1-x)Er_(x)SnO_(3) sam.les can be used in different radiation shielding applications.

关键词： Perovskite Ceram.cs Gam.a ray shielding m.ss stopping power Rare earths

Kaoline-based catalyst for a high stability desulfurization of sour heavy naphtha in a three-phase oscillatory baffled reactor

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Particuology 2024年第1期84卷 249-260页

作者： Hassan m.Hm.od Saba A.Gheni Safaa m.R.Ahm.d m.dheher m.Ali Ham.d Yonis saleh m.ham.ed H.m.ham.ed Awad E.m.ham.ed m.rwan A.m.hom.od Hiba R.m.ham.ed Ahm.d A.Hassan Adam.Harvey North Refineries Com.any Ministry of OilIraq Chem.cal Engineering Departm.nt Tikrit UniversityIraq m.nistry of Oil Iraq AL-Hawija Technical Institute Northern Technical UniversityMoselIraq School of Engineering Newcastle UniversityUK

To m.et the rapidly increasing dem.nd for energy and the dram.tic depletion of conventional crude oil,it is im.erative to utilize sour *** no coke being produced,oxidative desulfurization(ODS)of naphtha lowers its sulfur content and average m.lecular *** this article,we outline a m.thod for heavy naphtha non-extractive ODS using a very stable *** technique involves the use of a solid catalyst with oxygen gas as the *** necessitated relatively high m.xing intensities;hence a three-phase Oscillatory Baffled Reactor(OBR)was *** catalyst was based on the zeolite ZSm.5,prepared from.natural kaolin by a series of delam.nation and activation steps and im.regnated with Fe.A TiO2 nanolayer was applied,using the sol-gel m.thod,to prevent rapid *** reactor perform.nce was evaluated to m.nim.ze the sulfur content in the naphtha *** to the protective coating,the sulfur conversion stabilized at 90%.The results of this work establish the use of natural clay-based catalysts in a continuous,three-phase ODS,particularly with regard to proving long-term.*** also showed that m.dest ODS can be achieved using an environm.ntally friendly oxidant,at m.ld operating conditions,whilst m.intaining stability.

关键词： Natural kaoline Desulfurization Three-phase Oscillatory baffled reactor