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Geochemistry and spectrometric prospection of younger granites and granitic pegmatites bearing uranium mineralization at *** El Rakeb area, Central Eastern Desert, Egypt

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Acta Geochimica 2021年第4期40卷 575-601页

作者： Gehad M.Saleh bahaa M.Emad ibrahim b.abdel kader Nuclear Materials Authority El MaadiP.O.Box 530CairoEgypt

The present study deals with the detailed field geology,mineralogy,geochemistry,and spectrometric prospection of rare metals and radioactive minerals associated with granitic pegmatites in the Gabal Um LassafAbu Dob-Um Atelia-Kadabora-Kab El Rakeb area(LDAKK),which are situated in the central Eastern Desert of *** study area is composed of granodiorites and *** latter is dissected by granitic pegmatites with a discriminatory distribution of economically important mineralization(rare-metals and U-Th minerals).The granitic pegmatites display a zoning structure composed of feldspar-rich zones enveloping pockets of mica(mostly muscovite) and all zoning internal quartz ***,the monzogranite and granitic pegmatites are composed of potash-feldspar,albite,and quartz with a small amount of biotite and *** mineralogical investigation of the highly radioactive zones in the granitic pegmatite shows enrichment in kasolite,uranothorite,thorite,xenotime,columbite,zircon,bismuth,and ***,the granitic pegmatites are enriched with high field strength elements(HFSE;Zr,Nb,Th,and U) and ion lithophilic elements(LILE;Rb,and Pb) and depleted in ba,Sr,and *** are strongly peralkaline to metalumainous except for two samples,which are *** are formed by partial melting of metagreywackes at *** studied granitic pegmatites could belong to the NYF family(Niobium-Yttrium-Fluorine family) according to the geochemistry of the trace *** studied granitic pegmatites show deep negative Eu anomaly and display a strong M-type tetrad effect of rare earth *** field spectroscopy measurements showed the localization of the radiometric anomalous associated with the granitic pegmatites,which are intruded in the granitic host *** eU and eTh contents reached up to 316 and 1367 ppm,*** and thorium occurrences in the investigated granitic pegmatites are related to magmatic(syngenetic)ori

关键词： Geochemistry Gabal Um Lassaf-Abu Dob-Um Atelia-Kadabora-Kab El Rakeb area(LDAKK) Uranium REE Egypt

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The possible source of uranium mineralization in felsic volcanic rocks,Eastern Desert,Egypt of the Arabian-Nubian Shield:Constraints from whole-rock geochemistry and spectrometric prospection

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Acta Geochimica 2021年第5期40卷 819-845页

作者： Gehad.M.Saleh bahaa.M.Emad ibrahim.b.abdel kader Rania.M.Sakr Nuclear Materials Authority El MaadiP.O.Box 530CairoEgypt

The present work deals with the detailed geology,mineralogy,geochemistry,and spectrometric prospection of the felsic volcanic rocks at the Eastern Desert,Egypt of the Arabian-Nubian *** volcanic rocks are an essential source for rare earth elements(REEs)and uranium occurrences in this *** are compositionally uniform with tholeiitic to calc-alkaline affinities,peraluminous and belong to the series of rhyolite with high-K *** exhibit more enrichment in high field strength elements(HFSE,***,Ta,Nd,Th,and U)and large-ion lithophile elements(LILE,*** and Rb)compared to the country rocks of the studied area,with REE ranging from 188.20 to 442.70 ppm and strong depletion in Ti,Sr,P with deep negative Eu *** felsic volcanic rocks were mostly generated from the partial melting of quartz-amphibolite facies accreted during the *** oddities of Zr-U-Th for the felsic volcanic rocks determine the involvement of crustal *** volcanic rocks are found in A-type suites of magma and represent highly fractionated rocks derived from rhyolitic magma,with insignificant interaction with continental crust in the low-pressure environment and during fractional *** volcanic rocks have higher values of radioactivity in which eU range from 0.5 to 121 ppm and eTh from 1.0 to 415.10 *** high values of eU and eTh can be ascribed to the mineralization of uranium and the presence of accessory minerals of radiogenic nature such as uranophane,uranothorite,zircon,and *** is considered as the mineral with most enriched uranium contents in the studied felsic volcanic rocks in which(UO2=87.30 wt%).Also,they are enriched with REE-bearing accessory minerals comprising allanite,titanite,and *** geological investigations of the felsic volcanic rocks in the studied areas are inappropriate to clear the feasible economic potentialities of rare earth elements and U occurrences;itemized and invaluable

关键词： Felsic volcanic rocks Geochemistry REE Uranium mineralization Egypt Arabian-Nubian Shield

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On the nonclassical dynamics of cavity-assisted four-channel nonlinear coupler

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Chinese Physics b 2018年第11期27卷 498-505页

作者： Rafael Julius abdel-baset M A ibrahim Pankaj Kumar Choudhury Hichem Eleuch Faculty of Applied Sciences Universiti Teknologi MARA (UiTM) Faculty of Applied Sciences Universiti Teknologi Mara (UiTM) Perak Tapah Campus Institute of Microengineering and Nanoelectronics Universiti Kebangsaan Malaysia Department of Applied Sciences and Mathematics College of Arts and Sciences Abu Dhabi University Institute for Quantum Science and Engineering Texas A&M University College Station

The non-classical properties of light propagating in four-channel Kerr waveguides, confined in an optical cavity, are studied. The solution to the Hamiltonian of field operators is obtained semi-analytically by using symmetrically ordered phase-space representation. Full quantum analysis of the input coherent fields displays a strong transition of photon property between the super-Poissonian and sub-Poissonian statistics. It is found that the cavity-assisted multichannel system exhibits enhanced squeezing both in single-and compound-mode. This multichannel system may be utilized as an efficient quantumlight generator.

关键词： squeezed states Kerr effects Langevin equation

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Incidence and risk factors of post-phototherapy neonatal rebound hyperbilirubinemia

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World Journal of Pediatrics 2018年第4期14卷 350-356页

作者： Ismail Mohamed Elhawary Eman abdel Ghany abdel Ghany Walaa Alsharany Aboelhamed Shahinaz Gamal Eldin ibrahim Department of Pediatrics Faculty of MedicineCairo UniversityAli Basha EbrahimPO Box 11562CairoEgypt Department of Pediatrics Ministry of HealthCairoEgypt

background To determine the incidence and risk factors of post-phototherapy rebound hyperbilirubinemia because data about bilirubin rebound in neonates are lacking and few studies have concerned this condition. Methods A prospective observational study was conducted on 500 neonates with indirect hyperbilirubinemia who were treated according to standard guidelines. Total serum bilirubin (TSb) was measured at 24–36 h after phototherapy;significant bilirubin rebound (SbR) is considered as increasing TSb that needs reinstitution of phototherapy. Results A total of 124 (24.9%) neonates developed SbR with TSb increased by 3.4 (2.4–11.2) mg/dL after stopping pho-totherapy. Multiple logistic regression model revealed the following significant risk factors for rebound: low birth weight (b = 1.3,P b = 2.5,P b = 0.83, P= 0.03, OR 2.3), hemolysis (b = 1.2,P bilirubin level (b = 0.3,P = 0.001, OR 1.3), and short duration of conventional phototherapy (b = ? 1.2,P bR should be considered in neonates with hemolysis, low birth weight, suspected sepsis, short duration of conventional phototherapy, exposure to intensive phototherapy, and relatively high discharge TSb. These risk factors should be taken into account when planning post-phototherapy follow-up.

关键词： Conventional phototherapy Hemolysis Intensive phototherapy Neonatal hyperbilirubinemia Rebound hyperbilirubinemia

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Development of New Strategy for Non-Antibiotic Therapy: bovine Lactoferrin Has a Potent Antimicrobial and Immunomodulator Effects

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Advances in Infectious Diseases 2013年第3期3卷 185-192页

作者： Salama M. Abd El Hafez Alaa b. Ismael Manal b. Mahmoud abdel-kader A. Elaraby Department of Medical biotechnology Faculty of Applied Medical Sciences Taif University Turaba KSA

The antibiotic therapy has many problems, such as antibiotics resistance, hypersensitivity, direct toxicity, antibiotic-induced immunosuppresion and super-infections. This is highlighting the need for a new strategy for non-antibiotic therapy through the use of novel immunomodulators as naturally released ones (Lactoferrin). The present study investigates the potential of bovine lactoferrin (bLf), isolated from bovine milk whey, to prevent Staphylococcus aureus (S. aureus), Escherichia coli (E. coli), Streptococcus agalactiae (S. agalactiae) and Pseudomonas aeruginosa (P. aerogenosa) growth and then evaluates its immunomodulator effect. First, bLf isolation was attempted from bovine milk whey using a cation exchange chromatography by SP-Sepharose. Second, the antimicrobial activity assays were trailed to study the antimicrobial activity of bLf. Finally, the immune effect of bLf was studied by lymphocyte transformation test. It was found that bLf was separated around molecular weight of 80 kDa and showed significant inhibitory effect against E. coli followed by P. aeruginosa, S. agalactiae and S. aureus. bLf increased lymphocyte transformations mean values in a dose dependant manner. The highest transformations mean value was determined at 50 μg/mL. In conclusion, these results suggest that bLf is a potent natural antimicrobials and immunomodulator agent.

关键词： bovine Lactoferrin Isolation Antimicrobial and Immunomodulator Effects

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Could Dystonia be Initial Presentation of Corpus Callosum Infarction in Young Age Patients? A Case Report Study

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Neuroscience & Medicine 2015年第2期6卷 62-64页

作者： Mohamed Hamdy ibrahim Alyaa Fadhil Sameh Saied Ali Salma Fathy abdel kader Mohamed Khalid Kiran Kumar Shivram Kumar Janhavi Sirsat Department of Neurology GMCH & RC Ajman United Arab Emirates Department of Clinical Pharmacology GMCH & RC Ajman United Arab Emirates Department of Radiology GMCH & RC Ajman United Arab Emirates Department of Internal Medicine GMCH & RC Ajman United Arab Emirates Gulf Medical University (GMU) Ajman United Arab Emirates

Focal dystonia in young aged patients is considered to be the uncommon clinical presentation, unless a secondary cause is to be considered. Infarcts of the corpus callosum are rare and have not been well documented previously. As for a variety of signs and symptoms due to corpus callosum lesion, focal dystonia can be easily overlooked. The case is approved by ethical committee and explained to the patient with patient approval.

关键词： Focal Dystonia Corpus Callosum Infarction Involuntary Movement

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Case Report on Hiccup and Lateral Medullary Syndrome

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Neuroscience & Medicine 2015年第2期6卷 58-61页

作者： Mohamed Hamdy ibrahim Alyaa Fadhil Sameh Saied Ali Salma Fathy abdel kader Mohamed Khalid Kiran Kumar Shivram Kumar Janhavi Sirsat Department of Neurology GMCH & RC Ajman United Arab Emirates Department of Clinical Pharmacology GMCH & RC Ajman United Arab Emirates Department of Radiology GMCH & RC Ajman United Arab Emirates Department of Internal medicine GMCH & RC Ajman United Arab Emirates Gulf Medical University (GMU) Ajman United Arab Emirates

The case study is aimed at providing a more thorough analysis of a case of lateral medullary syn-drome presented only with persistent hiccup after eating lunch the study hopes to generate an interest for further studies into the topic and focuses on abnormal unusual presentations of lateral medullary syndrome. Ethical committee has approved this case after taking consent from the patient and explaining to him the importance of the case in clinical practice.

关键词： Hiccup Lateral Medullary Syndrome Stroke

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Determination of a novel ACE inhibitor in the presence of alkaline and oxidative degradation products using smart spectrophotometric and chemometric methods

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Journal of Pharmaceutical Analysis 2014年第2期4卷 132-143页

作者： Maha abdel-Monem Hegazy Maya Shaaban Eissa Osama ibrahim Abd El-Sattar Mohamed Mohamed Abd El-Kawy Analytical Chemistry Department Faculty of PharmacyCairo UniversityCairoEgypt Analytical Chemistry Department Faculty of PharmacyEgyptian Russian UniversityCairoEgypt National Organization of Drug Control and Research GizaEgypt

Simple, accurate, sensitive and validated UV spectrophotometric and chemometric methods were developed for the determination of imidapril hydrochloride （IMD） in the presence of both its alkaline （AKN） and oxidative （OXI） degradation products and in its pharmaceutical formulation. Method A is the fourth derivative spectra （D4） which allows the determination of IMD in the presence of both AKN and OXD, in pure form and in tablets by measuring the peak amplitude at 243.0 nm. Methods b, C and D, manipulating ratio spectra, were also developed. Method b is the double divisor-ratio difference spectrophotometric one （DD-RD） by computing the difference between the amplitudes of IMD ratio spectra at 232 and 256.3 nm. Method C is the double divisor-first derivative of ratio spectra method （DD-DR1） at 243.2 nm, while method D is the mean centering of ratio spectra （MCR） at 288.0 nm. Methods A, b, C and D could successfully determine IMD in a concentration range of 4.0-32.0 mg/mL. Methods E and F are principal component regression （PCR） and partial least-squares （PLS）, respectively, for the simultaneous determination of IMD in the presence of both AKN and OXI, in pure form and in its tablets. The developed methods have the advantage of simultaneous determination of the cited components without any pre-treatment. The accuracy, precision and linearity ranges of the developed methods were determined. The results obtained were statistically compared with those of a reported HPLC method, and there was no significant difference between the proposed methods and the reported method regarding both accuracy and precision.

关键词： Double divisor-ratio difference Double divisor-ratio derivative Mean centering of ratio spectra Chemometry Imidapril hydrochloride

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Development of New Strategy for Non-Antibiotic Therapy: Dromedary Camel Lactoferrin Has a Potent Antimicrobial and Immunomodulator Effects

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Advances in Infectious Diseases 2013年第4期3卷 231-237页

作者： Alaa b. Ismael Salama M. Abd El Hafez Manal b. Mahmoud abdel-kader A. Elaraby Hany M. Hassan Department of Medical biotechnology Faculty of Applied Medical Sciences Taif University Turaba KSA Department of Animal Medicine Faculty of Veterinary Medicine Zagazig University Zagazig Egypt Department of Medical Microbiology Faculty of Applied Medical Sciences Taif University Turaba KSA Immunobiology and Immunopharmacology Unit Animal Reproduction Research Institute (ARRI) Giza Egypt Holding Company for biological Products & Vaccines VACSERA Giza Egypt Immunobiology and Immunopharmacology Unit Animal Reproduction Research Institute (ARRI) Giza Egypt

The human and bovine lactoferrin have been studied extensively, but very few reports have been published concerning camel lactoferrin (cLf). The present study aimed to isolate cLf and evaluate its efficiency including antimicrobial activity and immunomodulator effects. cLf isolation was attempted from camel milk whey using a cation exchange chromatography by SP-Sepharose. The antimicrobial activity of the isolated cLf was investigated against Staphylococcus aureus (S. aureus), Streptococcus agalactiae (S. agalactiae), Escherichia coli (E. coli) and Pseudomonas aeruginosa (P. aerogenosa) strains. The immune effect of cLf was studied by lymphocyte transformation test. It was found that cLf was separated around molecular weight of 80 kDa and showed significant inhibitory effect against E. coli followed by P. aeruginosa, S. agalactiae and S. aureus. cLf increased lymphocyte transformations mean values in a dose dependant manner. The highest transformations mean value was determined at 50 μg/mL. In conclusion, these results suggest that cLf is a potent natural antimicrobial and novel immunomodulator agent.

关键词： Dromedary Camel Lactoferrin Isolation Antimicrobial and Immunomodulator Effects

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Chronic Subdural Hematoma Associated with an Arachnoid Cyst in Elderly, an Intraoperative Finding after Re-bleeding: Case Report

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Open Journal of Modern Neurosurgery 2024年第1期14卷 57-63页

作者： Komi Egu Agbéko Komlan Doléagbénou Messan Hobli Ahanogbé abdel kader Moumouni Essossinam Kpélao Katanga Anthony békéti Department of Neurosurgery Sylvanus Olympio Teaching Hospital Lomé Togo Department of Neurosurgery Kara Teaching Hospital Kara Togo

Intracranial arachnoid cysts (AC) are believed to be congenital and chronic subdural hematomas tend to occur in elderly patients with a history of mild head injury. The association between these two entities sporadically occur in relatively young patients but rare in elderly patients. We report a 65-year-old man who presented with headache and dizziness of 2 months’ duration with a history of head injury. brain computed tomography (CT) a CSDH in right side and a hygroma in left side. After first operation with burr holes in both sides, the patient underwent an early recurrence of acute subdural hematoma in the right side. The evacuation of this hematoma by a craniotomy allowed seeing an AC that we resected partially with complete recovery of the patient. The association CSDH/AC is rare and possible in elderly patients and there is no consensus on treatment.

关键词： Arachnoid Cyst Chronic Subdural Hematoma Elderly Patient

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