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Acta Geologica Sinica(english edition) 2021年第5期95卷 1568-1582页

作者： mohamed A.ALI Ahmed e.ABDeL GAWAD mohamed M.GHONeIM Nuclear Materials Authority 530 El-MaadiCairoEgypt

The garnet muscovite granitic pegmatite of Um Solimate,in southern egypt,represents a promising asset for strategic and economic metals,especially Bi-Ni-Ag-Nb-Ta as well as U and *** ore bodies occur as large masses,pockets and/or veins of very coarse-grained pegmatites,which consist mainly of K-feldspar,quartz and albite with subordinate muscovite,garnet,and *** data revealed that e U-and e Th-contents of the pegmatites reach up to 39 ppm and 82 ppm,*** studied pegmatites are enriched in primary U and Th minerals(uraninite,coffinite,thorianite and uranothorite)as well as Hf-rich zircon and monazite,which give rise to anomalous radioactive ***-tantalium-bearing minerals(***,microlite and uranopyrochlore),xenotime,barite,galena,fluorite,and apatite are ubiquitous,and,consequently,the studied pegmatites belong tothe Niobium-Yttrium-Fluorine-type(NYF)*** noble metal mineralization includes argentite(Ag_(2)S),native Ni and Bi as well as bismite and *** addition,beryl and tourmaline are observed in pegmatites near the contact with metasediments and ultramafic *** observed compositional variations of Ta/(Ta+Nb)and Mn/(Mn+Fe)ratios in columbite(0.08-0.45 and 0.11-0.57,respectively)and Hf contents in zircon(3.54-6.46 wt%)may reflectan extreme degree of magmatic fractionation leading to formation of the pegmatite orebody.

关键词： radioactivity rare-metal mineralization pegmatites U/Th-bearing minerals Um Solimate egypt

Process Noise Parameters of Beamforming Green Nodes

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Journal of electronic Science and Technology 2016年第2期14卷 111-117页

作者： Umar Suleiman Dauda NikNoordini NikAbdMalil Mazlina esa Kamaludin Mohd Yusof Mohd Fairus Mohd Yusoff mohamed Rijal hamid Department of Communication Faculty of Electrical EngineeringUniversiti Teknologi Malaysia81310 Johor BahruMalaysia

Signals arrive out of phase at the intended receiver from collaborative beamforming （CB） nodes due to the instability in the output frequency signals of the universal software radio peripheral＇s （USRP） local oscillator （LO）. These nodes including the target must synchronize their oscillator frequencies for coherent signal reception. In order to do this, frequencies and phases of the signals should be estimated in software defined radio （SDR） and smoothen with nonlinear filters such as the extended Kalman filter （eKF）. The process noise parameters of the NI USRP-2920 nodes will have to be calculated and used with the eKF process noise covariance matrix. These nodes are green communication hardware devices where most of the hardware units are now software defined. This article uses the direct spectrum method to obtain the phase noise values at various frequency offsets of the NI USRP-2920 in order to calculate the power spectral density of fractional frequency fluctuation. By applying the power-law noise model to this obtained value, the generated white frequency noise and random walk frequency noise values are q_1=1.93x10^-21 and q_2=5.86x10^-18, respectively.

关键词： Collaborative beamforming phasenoise process noise parameters universal software radioperipheral.

In vitro assessment of antioxidant,neuroprotective,anti-urease and anti-tyrosinase capacities of Tamarix africana leaves extracts

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Journal of Traditional Chinese Medicine 2023年第2期43卷 252-264页

作者： esma Anissa Trad Khodja Abd el hamid Khabtane Rabah Arhab Djamila Benouchenne mohamed Sabri Bensaad Chawki Bensouici Ramazan erenler Biotechnology WaterEnvironment and Health LaboratoryFaculty of Natural and Life SciencesUniversity Abbes LaghrourKhenchela 40000Algeria Laboratory of Natural Substances Biomolecules and Biotechnological ApplicationsFaculty of Natural and Life SciencesUniversity Larbi Ben M HidiOum El-Bouaghi 04000Algeria Genetics Biochemistry and Plant Biotechnology LaboratoryFaculty of Natural and Life SciencesUniversity Constantine 1Constantine 25000Algeria Pharmaceutical Sciences Research Center Constantine 25000Algeria Laboratory of Cellular and Molecular Physio-Toxicology-Pathology and Biomolecules(LPTPCMB) Faculty of Natural and Life SciencesUniversity Batna 2Batna 05000Algeria Laboratory of Biotechnology of Bioactive Molecules and Cellular Physiopathology(LBMBPC) Faculty of Natural and Life Sciences University Batna 2Batna 05000Algeria Biotechnology Research Center Ali Mendjli UV 03 Constantine 25000Algeria Department of Chemistry Faculty of Science and LiteratureUniversity TokatGaziosmanpasaTokat 60250Turkey

OBJeCTIVe:To characterize the chemical profile of methanolic crude extract and its fractions(ethyl acetate,n-butanol and aqueous)using liquid chromatographymass spectrometry(LC-MS)analysis,to evaluate their biological and pharmacological properties:antioxidant(1,1-diphenyl-2-pycrylhydrazyl(DPPH),2,2′-azino-bis(3-ethylbenzothiazoline-6-sulphonic)(ABTS·+),galvinoxyle free radical scavenging,reducing power,phenanthroline andβcarotene-linoleic acid bleaching assays),enzymes inhibitory ability against several enzymes[acetylcholinesterase(AChe),buthyrylcholinesterase(BChe),urease and tyrosinase].MeTHODS:Secondary metabolites were extracted from Tamarix africana air-dried powdered leaves by maceration,the crude extract was fractionated using different solvents with different polarities(ethyl acetate,n-butanol and aqueous).The amount of polyphenols,flavonoids and tannins(hydrolysable and condensed)were determined using colorimetric assays.A variety of in vitro biochemical tests were carried out to assess antioxidant and oxygen radical scavenging properties using DPPH,ABTS,galvinoxyle free radical scavenging,reducing power,phenanthroline andβcarotene-linoleic acid bleaching *** effect was examined against acetylcholinesterase and buthyrylcholinesterase *** anti-urease and antityrosinase activities were performed against urease and tyrosinase enzymes *** extract’s components were identified using LC-MS and compared to reference ***:The results indicated that Tamarix africana extracts presented a powerful antioxidant activity in all assays and exhibited a potent inhibitory effect against AChe and BChe as well as urease and tyrosinase ***-MS analysis identified amount of eight phenolic compounds were revealed in this analysis;Apigenin,Diosmin,Quercetin,Quercetine-3-glycoside,Apigenin 7-O glycoside,Rutin,Neohesperidin and Wogonin in methanolic extract and its different fractions of Tamarix africana from ***

关键词： antioxidants anti-tyrosinase anti-urease liquid chromatography-mass spectrometry neuroprotection phenolic content Tamarix africana

effect of fineness of ash on pozzolanic properties and acid resistance of sugarcane bagasse ash replaced cement mortars

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Frontiers of Structural and Civil engineering 2022年第10期16卷 1287-1300页

作者： Shan e ALI Rizwan AZAM Muhammad Rizwan RIAZ mohamed ZAWAM Department of Civil engineering University of Engineering&Technology LahoreLahore 54890Pakistan Faculty of engineering Cairo UniversityCairo 12613Egypt

This paper addresses the potential use of Sugar Cane Bagasse Ash(SCBA)as a pozzolanic material for partial cement replacement in concrete *** mortars containing SCBA having five different particle size distributions at a replacement rate of 20%by weight were used to study the chemical and physical pozzolanic properties of *** durability of SCBA replaced mortars was also *** with 0%retained on sieve No.325 was used to replace 20%by weight of cement and create mortar specimens that were subjected to sulfuric acid attack of varying concentrations(1%–3%by weight of water).The tested samples were observed to check visual distortion,mass loss,and compressive strength loss at 1,7,14,28,and 56 d of acidic exposure,and the results were compared to those for the control sample,that was lime water cured,at the same *** SCBA sets were found to meet the requirements for pozzolan class N specified by ASTM C *** containing SCBA with 0%or 15%retention produced better compressive strength than the control mortars after 28 ***,X-ray fluorescence and X-ray diffraction analysis showed that the SCBA had favorable chemical properties for a pozzolanic ***,SCBA replaced samples at all ages showed improved resistance against acidic attack relative to that of the control *** deterioration was seen for 3%concentrated *** study’s findings demonstrated that SCBA with an appropriate fineness could be used as a pozzolanic material,consistently with ASTM C 618.

关键词： durability cement replacement sugarcane bagasse ash fineness of ash pozzolanic properties mortar acid resistance

Influence and Optimization of Surface Roughness on Surface Integrity during Turning Using Grey Relational Analysis

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Journal of Harbin Institute of Technology(New Series) 2021年第2期28卷 38-46页

作者： Suha K Shihab ethar mohamed Mubarak Rawaa hamid Al-Kalali Department of Materials engineering College of EngineeringUniversity of DiyalaDiyala 32001Iraq Institute of Technology Middle Technical UniversityBaghdad 10001Iraq

Current machining studies have reported effects of prevalent and common factors,while ultra⁃high finish requires holistic approach to identify all factors and investigate their effects on machining of hard to machine *** this work,a less investigated yet important factor,roughness of the uncut surface,was studied,and its effects on the individual response,i.e.,surface finish of the machined part,were found to be *** 316,which is mainly applied in strategic areas,was selected and three effective turning factors,cutting speed(A),feed rate(B),and roughness of the uncut surface(C)on three output responses including surface roughness of the machined surface(Ra),microhardness(HV),and material removal rate(MRR),were ***,single response optimization of the individual output response and multi⁃response optimization of all the three responses were carried *** L9 orthogonal array based signal⁃to⁃noise(S/N)ratio method was used for individual response optimization,and grey relational analysis(GRA)was employed for multi⁃response *** of the process factors on the output responses were evaluated through inclusive statistical *** individual response optimization revealed that there was a considerable effect of roughness of the uncut surface on the machining *** of the GRA illustrated that the speed during the cutting process and the feed rate had substantial trace on the surface integrity(indicated by Ra and HV)and production rate(indicated by MRR),while roughness of the uncut surface did not have a significant effect.

关键词： turning surface integrity Taguchi method optimization GRA

Curcumin gum Arabic nanoparticles demonstrate potent antioxidant and cytotoxic properties in human cancer cells

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BIOCeLL 2022年第3期46卷 677-687页

作者： ABDeLKADeR HASSANI SITI ASLINA HUSSAIN MOTHANNA SADIQ AL-QUBAISI mohamed LAKHDeR BeLFAR HAKIM BeLKHALFA hamid HAMMAD eNeZeI hamid ZeNTOU WISAM NABeeL IBRAHIM ABD ALMONeM DOOLAANeA Department of Pharmaceutical Technology Faculty of PharmacyInternational Islamic University MalaysiaKuantanMalaysia Department of Chemical and environmental engineering University Putra MalaysiaSerdang43400Malaysia Department of Chemistry Faculty of Mathematics and Material SciencesUniversity of kasdi MurbahOuarglaAlgeria UPM-MAKNA Cancer Research Laboratory Institute of BioscienceUniversity Putra MalaysiaSerdangMalaysia Scientific and Technical Research Center in Physicochemical Analysis Bou-IsmailTipazaAlgeria Department of Oral&Maxillofacial Surgery College of DentistryUniversity of AnbarRamadiIraq Department of Biomedical Sciences College of Health SciencesQU HealthQatar UniversityDohaQatar Pharmaceutical Research Unit QU HealthQatar UniversityDohaQatar

The main purpose of the study was to enhance the stability and therapeutic effects of Curcumin(Cur)through nanoformulation with gum Arabic(GA)as a coating agent through an efficient synthetic *** antioxidant properties of the developed nanoparticles(Cur/GANPs)were assessed through several in vitro assays,such asβ-carotene bleaching activity,DPPH,and nitric oxide scavenging activities in addition to evaluating its inhibitory activity on angiotensinconverting enzyme(ACe).The cytotoxicity of Cur/GANPs was evaluated in vitro using different types of human cancer cells including breast cancer(MCF7,MDA-MB231),liver cancer(HepG2),and colon cancer(HT29)*** prepared particles displayed an elliptical shape with a size ranging between 20–260 nm and a potential difference of–15 *** Cur/GANPs exhibited significant antioxidant activity compared to free curcumin when using concentrations between 31.5 and 500μg/*** Cur/GANPs also had inhibited the growth of all cancer cell lines in a proportional trend with concentrations ***,the encapsulation with gum Arabic has augmented the antioxidant and anti-neoplastic effects of ***,Cur/GANPs may have effective therapeutic properties in diseases attributed to oxidative stress like cancer and hypertension.

关键词： Curcumin Gum arabic Nanoparticles Cancer cells Antioxidants

A Multi-Level Threshold Method for edge Detection and Segmentation Based on entropy

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Computers, Materials & Continua 2020年第4期63卷 1-16页

作者： mohamed A.el-Sayed Abdelmgeid A.Ali mohamed e.Hussien Hameda A.Sennary Department of Mathematics Faculty of ScienceFayoum UniversityFayoumEgypt.CurrentlyComputer Science DepartmentTaif UniversityTaifSaudi Arabia Computer Science Department Faculty of Computers and Information Minia UniversityMiniaEgypt Department of Mathematics Faculty of ScienceAswan UniversityAswanEgypt

The essential tool in image processing,computer vision and machine vision is edge detection,especially in the fields of feature extraction and feature *** is a basic area in information *** entropy,in image processing field has a role associated with image *** an initial step in image processing,the entropy is always used the image’s segmentation to determine the regions of image which is used to separate the background and objects in *** segmentation known as the process which divides the image into multiple regions or sets of *** applications have been development to enhance the image *** paper utilizes the Shannon entropy to achieve edge detection process and segmentation of the *** introduces a new method of edge detection for 2-D histogram and Shannon entropy based on multilevel *** method utilizes the gray value and the average gray value of the pixels to achieve the two dimensional *** current method has apriority in comparison to some upper classical *** experimental results exhibited that the proposed method could capture a moderate quality and execution time better than other comparative methods,particularly in the largest images *** proposed method offers good results when applied with images of different sizes from the civilization of ancient egyptians.

关键词： Multi-level threshold edge detection 2D histogram entropy

effect of Using Baker＇s Yeast and exogenous Digestive enzymes as Growth Promoters on Growth, Feed Utilization and Hematological Indices of Nile tilapia, Oreochromis niloticus Fingerlings

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Journal of Agricultural Science and Technology(B) 2012年第1期2卷 15-28页

作者： Ashraf mohamed Abdelsamee Goda Hafez Abdel-hamid Hassan Mabrouk mohamed Abd eI-hamid Wafa Tarek mohamed e1-Afifi National Institute of Oceanography and Fisheries （NIOF） Fish Nutrition Laboratory Cairo 24135 Egypt Regional Center for Foods and feeds Agriculture Research Center Ministry of Agriculture Cairo 24135 Egypt

The present study was conducted to evaluate the effect of baker yeast, Saccharomyces cerevisiae （SC） and exogenous digestive enzymes （pepsin, papain and a-amylase, eDe） dietary supplementation on growth performance, feed utilization and hematological indices of Nile tilapia, Oreochromis niloticus fingerlings. A total of 630 Nile tilapia fingerlings with an average body weight of 26.4 ± 0.2 g were divided in the seven experimental net-pen treatments （three replicates each）. The experiment was conducted for 119 days. Seven isonitrogenous （26.50%） digestible protein and isocaloric （13.40 MJ kgl） digestible energy experimental diets were formulated. The control diet had no SC and eDe added. Diets 2-3 each contained SC at levels of 2 and 4 g 100 g diet-t, respectively, while diets 4-5 each contained eDe at levels of （0.64, 1.28, 0.16） and （1.28, 2.56, 0.32） g 100 gdiefI of pepsin, papain and a-amylase, respectively. Diet 6 contained mixture of SC and eDe at levels of 1 g yeast and 0.32, 0.64, 0.08 g of pepsin, papain and a-amylase, respectively 100 gdiet1 and diet D7 contained 2 g yeast and 0.64, 1.28, 0.16 g of pepsin, papain and a-amylase, respectively 100 g dietl. Growth performance and feed utilization efficiency of Nile tilapia were significantly （P 〈 0.05） higher in all treatments receiving SC and/or eDe supplemented-diets than the control diet which suggests that the addition of SC and eDe enhanced the growth performance. Red blood cells counts, hematocrit and hemoglobin were significantly （P 〈 0.05） highest in all treatments receiving mixture of SC and eDe supplemented-diets （D6 ＋ D7）. The same trend was observed for total plasma protein and total plasma globulin levels. The results of present study suggested that Nile tilapia fingerlings fed diets containing the mixture of I g yeast, SC and 0.32, 0.64, 0.08 g of pepsin, papain and a-amylase, respectively 100 gdiet^-1, for 119 days had enhanced growth performance, diet utilization efficiency and hematological ind

关键词： Baker yeast digestive enzymes growth feed utilization hematological indices Nile tilapia.

Improving the Construction Industry Quality Using the Seven Basic Quality Control Tools

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Journal of Minerals and Materials Characterization and engineering 2019年第6期7卷 412-420页

作者： mohamed Abdel-hamid Hanaa mohamed Abdelhaleem Civil engineering Department Faculty of Engineering at Shobra Benha University Benha Egypt Civil engineering Department Delta Higher Institute for Engineering and Technology Mansoura Egypt

The organizations used quality tools to develop their processes and gain satisfaction from the customers. The main objective of this study is to develop levels of quality in the construction industry through the use of the seven basic quality control tools. Such tools are extremely crucial tools which are used worldwide in the industries for continual improvement. The seven basic quality tools are Check Sheet, Histogram, Pareto Chart, Fishbone Diagram, Control Chart, Flowchart and Scatter Diagram. They were implemented in various steps of the process in order to define the problems, measure its impacts, find out its root causes and solve these problems to ensure the production of non-defective items. The study shows how the seven basic tools of quality are very useful and effective in identifying and removal of defects from the manufacturing process. These tools are helpful in every stage of the defect removal process. This study was conducted on Cleopatra Group Company. This company succeeded to serve the public and private projects in the egyptian construction sectors.

关键词： Quality Improvement Seven Basic Quality Control Tools Construction Industry

On the cratonization of the Arabian-Nubian Shield: Constraints from gneissic granitoids in south eastern Desert, egypt

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Geoscience Frontiers 2021年第4期12卷 215-243页

作者： Ali A.Khudeir Jean-Louis Paquette Kirsten Nicholson Åke Johansson Tyrone O.Rooney Sadiq hamid mohamed A.el-Fadly Loretta Corcoran Shawn J.Malone mohamed Ali Abu el-Rus Geology Department Faculty of ScienceAssiut University71516Egypt UniversitéClermont Auvergne CNRSIRDOPGCLaboratoire Magmas et VolcansF-63000 Clermont-FerrandFrance Ball-State University Department of EnvironmentGeology and Natural Resources117 Fine Art BuildingMuncieIN 47306USA Department of Geosciences Swedish Museum of Natural HistoryBox 50007SE-10405 StockholmSweden Department of earth and environmental Sciences Michigan-State UniversityEast LansingMI 48824USA Notre Dame University Department of Civil and Environmental Engineering and Earth Sciences156 Fitzpatrick HallNotre DameIN 46556USA

The Shaitian granite complex(SGC)spans more than 80 Ma of crustal growth in the Arabian–Nubian Shield in southeast *** is a voluminous composite intrusion(60 km2)comprising a host tonalite massif intruded by subordinate dyke-like masses of trondhjemite,granodiorite and *** host tonalite,in turn,encloses several,fine-grained amphibolite enclaves.U-Pb zircon dating indicates a wide range of crystallization ages within the SGC(800±18Ma for tonalites;754±3.9 Ma for trondhjemite;738±3.8 Ma for granodiorite;and 717±3.2 Ma for monzogranite),suggesting crystallization of independent magma *** high positiveεNdi(+6–+8)indicate that the melting sources were dominated by juvenile material without any significant input from older *** of zircon saturation geothermometry indicates increasing temperatures during the generation of melts from 745±31℃ for tonalite to 810±25℃ for trondhjemite;840±10℃ for granodiorite;and 868±10℃ for *** pressure of partial melting is loosely constrained to be below the stability of residual garnet(erred fromthe almost flat HRee pattern((Gd/Lu)N=0.9–1.1),but>3 kbar for the stability of residual amphibole as inferred from the significantly lower NbN and TaN compared with LReeN and the sub-chondrite Nb/Ta ratios exhibited by the granitic *** inverse relation between the generation temperatures and the ages estimates of the granitoid lithologies argue against a significant role of fractional *** major and trace element contents indicate the emplacement of the SGC within a subduction zone *** lacks distinctive features for melt derived from a subducted slab(*** Sr/Y and high(La/Yb)N ratios),and the relatively low MgO and Ni contents in all granite phases within the SGC suggest melting within the lower crust of an island arc overlying a *** melts produced during melting experiments indicates an amphibolite of basaltic composition is th

关键词： Arabian-Nubian Shield(ANS) Cratonization Fractional crystallization Partial melting Subduction zones Tonalite-Trondhjemite-granodiorite(TTG)