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Journal of Pharmaceutical Analysis 2014年第4期4卷 258-269页

作者： hamed m.el-fatatry mokhtar m.mabrouk Ismail I.Hewala Ehab H.Emam Department of Pharmaceutical Analytical Chemistry Faculty of PharmacyUniversity of TantaTantaEgypt Department of Pharmaceutical Analytical Chemistry Faculty of PharmacyUniversity of AlexandriaEgypt Quality Sector Alexandria Company for PharmaceuticalsAlexandria 21521Egypt

Two selective stability-indicating HPLC methods are described for determination of rabeprazole sodium （RZ）-mosapride citrate （mR） and RZ-itopride hydrochloride （IO） mixturcs in the presence of their ICH-stress formed degradation products. Separations were achieved on X-Bridge CI 8 column using two mobile phases： the first for RZ-mR mixture consisted of acetonitrile： 0.（125 m KH,PO4 solution： TEA （30：69：1 v/v; pH 7.0）; the second for RZ-IO mixture was at ratio of 25：74：1 Iv/v： pH 9.25J. The detection wavelength was 283 nm. The two methods were validated and wdidation acceptance criteria were met in all cases. Peak purity testing using contrast angle theory, relative absorbance and log A versus the wavelengths plots were presented. The % recoveries of the intact drugs were between 99.1% and 102.2% with RSD% values less than 1.6%. Application of the proposed HPLC methods indicated that the methods could be adopted to follow the stability of their formulations.

关键词： Rabeprazole sodium mosapride citrate ltopride hydrochlorideStability-indicatingHPLC-DAD Peak purity

mineralogy and Geochemistry of Uraniferous Sandstones in Fault Zone,Wadi el Sahu Area,Southwestern Sinai,Egypt:Implications for Provenance,Weathering and Tectonic Setting

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Acta Geologica Sinica(English Edition) 2021年第3期95卷 830-845页

作者： Osama R.SALLAm hamed ImIRA Amira m.el TOHAmY Abd elhadi AABBAS Nuclear materials Authority El-Maadi Cairo P.O.Box:530Egypt

Paleozoic rocks in the Wadi el Sahu area are affected by many major faults in different directions.A reverse fault trending NE-SW is exposed for about 300 m of its length as it cuts through the Abu Hamata and Adedia formations on the south side of Wadi el Sahu.A secondary ascending hydrothermal solution carrying heavy metals and radioactive minerals passed through the fault plain and the surrounding fractures,forming mineralized and radioactive *** mineralized zone thickness ranges from 60 cm to 200 cm along the fault *** rocks were analyzed radiometrically using a portable gamma-ray spectrometer,chemically by employing ICP-ES and ICP-mS,as well as mineralogically by both binocular and Environmental Scanning electron *** content was also determined by fire *** and U contents reached up to 2682 and 1216 ppm,*** investigations indicated the presence of uraninite,torbernite,autunite,sklodowskite,kasolite as uranium minerals,thorite as a thorium mineral,monazite,allanite and xenotime as REE-bearing minerals,zircon and columbite as accessory minerals,gold and nickel as precious and base metals,in addition to cassiterite,chalcopyrite,chalcocite and *** REE and U contents are attributed to the circulation of epigenetic U and REE-bearing hydrothermal solutions along the fault plain and its surrounding *** alteration processes could then be confirmed by the presence of the m-type tetrad effect in the REE-patterns of the ferruginous *** non-chondritic ratio of Nb/Ta,Zr/Hf and Y/Ho in the studied sandstone may be attributed to the tetrad *** Ce and Eu anomaly with unusual REE-patterns was represented by the presence of conjugated m-W tetrad effects,indicating either the dual effect of hydrothermal solutions or groundwater with *** results clarify that the tetrad-effects could be used as evidence for the environment of deposition and as an indication for gold minerali

关键词： uranium gold RREs tetrad effect

Vibration suppression in multi-tool ultrasonic machining to multi-external and parametric excitations

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Acta mechanica Sinica 2009年第3期25卷 403-415页

作者： m.m.Kamel W.A.A.el-Ganaini Y.S.hamed Department of Engineering mathematics Faculty of Electronic EngineeringMenoufiya University

Ultrasonic machining （USm） is of particular interest for the machining of non-conductive, brittle materials such as engineering ceramics. In this paper, a multi-tool technique is used in USm to reduce the vibration in the tool holder and have reasonable amplitude for the tools. This can be done via dynamic absorbers. The coupling of four nonlinear oscillators of the tool holder and tools representing ultrasonic cutting process are investigated. This leads to a four-degree-of-freedom system subjected to multi-external and multi-parametric excitation forces. The aim of this work is to control the tool holder behavior at simultaneous primary, sub-harmonic and internal resonance condition. multiple scale perturbation method is used to obtain the solution up to the second order approximations. The different resonance cases are reported and studied numerically. The stability of the system is investigated by using both phase-plane and frequency response techniques. The effects of the different parameters of the tools on the system behavior are studied numerically. Comparison with the available published work is reported.

关键词： Control Stability Ultrasonic machining (USm)

Recent developments and trends in thermal blanching-A comprehensive review

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Information Processing in Agriculture 2017年第2期4卷 101-127页

作者： Hong-Wei Xiao Zhongli Pan Li-Zhen Deng hamed m.el-mashad Xu-Hai Yang Arun S.mujumdar Zhen-Jiang Gao Qian Zhang College of Engineering China Agricultural UniversityP.O.Box 19417 Qinghua DongluBeijing 100083China College of mechanical and electrical Engineering Shihezi UniversityShihezi 832001China Department of Biological and Agricultural Engineering University of CaliforniaOne Shields AvenueDavisCA 95616USA Department of Agricultural Engineering Mansoura UniversityMansouraEgypt Department of Bioresource Engineering McGill UniversitySte.Anne de BellevueQuebecCanada Healthy Processed Foods Research Unit USDA-ARS800 Buchanan St.AlbanyCA 94710USA

Thermal blanching is an essential operation for many fruits and vegetables *** not only contributes to the inactivation of polyphenol oxidase(PPO),peroxidase(POD),but also affects other quality attributes of *** we review the current status of thermal ***,the purposes of blanching,which include inactivating enzymes,enhancing drying rate and product quality,removing pesticide residues and toxic constituents,expelling air in plant tissues,decreasing microbial load,are ***,the reason to why indicators such as POD and PPO,ascorbic acid,color,and texture are frequently used to evaluate blanching process is *** that,the principles,applications and limitations of current thermal blanching methods,which include conventional hot water blanching,steam blanching,microwave blanching,ohmic blanching,and infrared blanching are ***,future trends are identified and discussed.

关键词： Thermal blanching Hot water blanching microwave blanching Steam blanching Ohmic blanching Infrared blanching

Cooling enhancement of planar-balanced magnetron cathode

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Nuclear Science and Techniques 2017年第8期28卷 69-74页

作者： m'hamed Salhi Seddik el Hak Abaidia Brahim mohamedi Sofiane Laouar Centre de Recherche Nucleaire de Birine B.P. 18017200 Ain-Oussera Algeria Unite de Recherche mPE Faculte des Sciences de l'Ingenieur Universite M'hamed Bougarra de Boumerdes 35000 Boumerdes Algeria

In physical vapor deposition on a magnetron cathode, temperature of sensitive components must be kept under threshold limit, so as to ensure the cathode reliability,the process reproducibility, and the best quality of thin *** can be achieved by an adequate design to enhance the dissipation of heat generated at the cathode. In this paper,temperature distribution and streamlines velocity of the cathode coolant inside a cathode magnetron are analyzed by using CFD solver ANSYS FLUENT in the single-phase method in combination with k–e standards turbulent *** results show that the design is appropriate under the calculation parameters, and for high heat densities some improvements are necessary to enhance heat dissipation and keep temperature under the threshold limit.

关键词：阴极冷却强化磁控平衡平面物理气相沉积 FLUENT 温度分布

Existence results and behavior analysis for nonlinear age-dependent population dynamics problems with conformable fractional operator

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International Journal of Biomathematics 2024年第5期17卷 229-256页

作者： Hiba el Asraoui m'hamed el Omari Ali el mfadel Khalid Hilal Laboratory of Applied mathematics Scientific Computing Sultan moulay Slimane University BP 523 Beni MellalMorocco

In this paper,we investigate the existence of solutions and analyze the large-time behavior for Gurtin-maccamy population model involving conformable fractional *** a preliminary step,we construct a generic structure of the solution associated with our proposed model by utilizing some basic properties and tools of conformable fractional *** establish the existence of a unique solution of the given model with the given initial *** last,by using the upper and lower solutions for the characteristic equation,we define the upper and lower boundaries for the obtained solution and describe the large-time behavior of the total population.

关键词： Age-dependent population conformable fractional operator upper and lower boundary of the solution dynamics of populations

Schistosomiasis with special references to the mechanisms of evasion

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Journal of Coastal Life medicine 2015年第11期 914-923页

作者： Nawras m.el-Saghier mowafy Ekhlas hamed Abdel-Hafeez Department of medical Parasitology Faculty of MedicineMinia UniversityMinya 61519Egypt Department of medical Parasitology College of MedicineUmm Al-Qura UniversityMakkahKSA

Schistosomiasis is a disease caused by infection with Schistosoma *** affects 200 million people worldwide,especially in the developing *** are five known species of Schistosoma which currently infect humans in various geographical *** with Schistosoma *** to two forms of the disease:acute and *** infection can affect various organs within the human body including the brain,lungs,gut and the reproductive organs,which leads to neuroschistosomiasis,pulmonary schistosomiasis,hepato-intestinal schistosomiasis and urinary genital schistosomiasis,*** Schistosoma *** a common denominator that they have the ability to infect,invade and evade the host’s immune *** *** a very complex organism that requires two hosts,mollusk and mammalian,to survive,propagate and complete its life ***,it has developed specific immune evasion mechanisms for each of *** Schistosoma *** infected and established itself within its mammalian host as an adult worm,it evades the immune mechanism of that ***,the antigens released by the eggs can elicit an immune response with formation of granuloma around *** formation is the main characteristic lesion in schistosomiasis,which in the liver can cause hepatomegaly in hepato-intestinal *** paper will summarize various immune responses against the parasite as well as varieties of strategies which developed by the Schistosoma *** persist within human hosts.

关键词： Schistosomiasis Schistosoma spp. Immune responses Evasion mechanism

Deposition of Phosphate Nanoparticles onto Textile Fabrics via Sol-gel method and Their Kinetics Desorption Studies

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Chemical Research in Chinese Universities 2020年第5期36卷 877-884页

作者： mohamed el mESSOUDI Aicha BOUKHRISS Laila SADALLAH Laila SAJID m'hamed el KOUALI Said GmOUH Laboratory REmTEX ESITHHigher School of Textile and Clothing Industties(ESITH)Kni8Route d'EL JADIDACasablancaMorocco Laboratory LIN1AT Faculty of Sciences Ben M'SikHassan II University of CasablancaB.P 5366 KiaarifCasablancaMorocco Laboratory LCAPCm Faculty of Sciences Ben M'SikHassan II Universityof CasablancaB.P 5366 MaarifCasablancaMorocco Laboratory L3GIE Mohamntadia School of EngineersMohammad V UniversityBP.765 Av.Ibn SinaAgdalRabatMorocco Laboratory LEC Higher School of Textile and Clothing Industries(ESITH)Km 8Route d'EL JADIDACasablancaMorocco

In this paper,phosphate nanoparticles were coated on cotton(CO)and polyester(PES)textile surfaces by sol-gel method using tetraethylorthosilicate(TEOS)and chloropropyltriethoxysilane(CPTS)as silica *** deposited nanoparticles were observed with scanning electronic microscopy energv-dispersive X-ray spectroscopy(SEm-EDX).The release kinetics of phosphorus(P)from these textiles into the aqueous medium(Aq),acid(Ac),and basic(Ba)artificial sweats were then *** released amount of phosphorus was evaluated by the inductively coupled plasma(ICP)according to ISO NF EN 16711-2 *** results revealed that the release of P into the aqueous medium is lower than in the artificial *** kinetics data[the phosphoras desorption amount(mg/g)as a iunction of time]were modeled according to five models:the first order,the second order,the third order,simple elovich and parabolic *** suitable model was chosen based on the coefficient of determination(R2)and the calculation of the sum of the absolute errors(EABS),which describes the error between the theoretical and experimental *** observations were also carried out on the fabrics after desorption in order to show the impact of desorption on their ***,the impact of P release on the tensile strength of CO and PES fabrics was investigated using a uniaxial tensile *** thennal stability of all samples before and after desorption was assessed by thermogravimetric aiialysis(ATG).

关键词： Sol-gel Coating Kinetic Desorption Phospliate nanoparticle

Effect of Food to microorganism Ratio on Biohydrogen Production in Batch Fermentation of Food Waste by mixed Sludge

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Effect of Food to Microorganism Ratio on Biohydrogen Product...

SutteARImA:A Novel method for Forecasting the Infant mortality Rate in Indonesia

2007年中国农业工程学会学术年会

作者：泮进明 hamed m.el-mashad 应义斌浙江大学 University of California Davis Davis 95616CAUSA 浙江大学

＜正＞Batch experiments were conducted to investigate the effect of food to microorganism ratio （F/m ratio）,between 0:1（blanks）and 10:1,on the fermentation of food waste using thermophilic and mesophilic mixed sludge without any *** were inoculated with 100 ml thermophilic sludge or 220 ml mesophilic sludge,both containing 1.54 g volatile solid（VS）.The blanks indicated that both seed sludge had a strong ability of producing CH4 but methanogens were almost completely inhibited at F/m≥*** F/m ratios between 7 and 10 are suitable to the thermophilic H2-producing *** best 44-h thermophilic fermentation performance was obtained at F/m 7,with a H2 yield of 56.5 ml/g food-VS fed,a H2 content of 37.9％ and a VS degradation of 39.2％.The pH range at F/m 7-10,between initial 6.55-6.27 and final 6.2-5.91,was suitable to the growth of the thermophilic H2-prodcuing *** mesophilic fermentation was only able to work well at F/m ratios of low level and narrow range（between 5 and 6）,with the highest performance of 38.8 ml/g food-VS H2 yield,34.5％ H2 content and 41.6％ VS degradation at F/m *** pH range at F/m 6（between initial 6.3 and final 5.7）was suitable to the growth of the mesophilic H2-prodcuing bacteria.A modified Gompertz equation adequately（R2＞0.946） described fermentative H2 production at all F/m *** research provides an approach of H2 production using raw mixed cultures free of chemicals for pretreatment and/or process pH control.

关键词： Biohydrogen production anaerobic digestion food waste Food to microorganism ratio pH

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Computers, materials & Continua 2022年第3期70卷 6007-6022页

作者： Ansari Saleh Ahmar Eva Boj del Val m.A.el Safty Samirah AlZahrani hamed el-Khawaga Business School Faculty of Economics and BusinessUniversitat de BarcelonaBarcelona08034Spain Department of Statistics Faculty of Mathematics and Natural ScienceUniversitas Negeri MakassarMakassar90224Indonesia Department of Economic Financial and Actuarial MathematicsFaculty of Economics and BusinessUniversitat de BarcelonaBarcelona08034Spain Department of mathematics and Statistics Colleage of SciencesTaif UniversityP.O.Box 11099Taif21944Saudi Arabia Department of Statistics Mathematicsand InsuranceFaculty of CommerceTanta UniversityEgypt Department of Economics and Finance College of Business AdministrationTaif UniversityP.O.Box 11099Taif21944Saudi Arabia

This study focuses on the novel forecasting method(SutteARImA)and its application in predicting Infant mortality Rate data in *** undertakes a comparison of the most popular andwidely used four forecasting methods:ARImA,Neural Networks Time Series(NNAR),Holt-Winters,and *** data used were obtained from the website of the World *** data consisted of the annual infant mortality rate(per 1000 live births)from 1991 to *** determine a suitable and best method for predicting Infantmortality rate,the forecasting results of these four methods were compared based on the mean absolute percentage error(mAPE)and mean squared error(mSE).The results of the study showed that the accuracy level of SutteARImA method(mAPE:0.83%andmSE:0.046)in predicting Infantmortality rate in Indonesia was smaller than the other three forecasting methods,specifically the ARImA(0.2.2)with a mAPE of 1.21%and a mSE of 0.146;the NNAR with a mAPE of 7.95%and a mSE of 3.90;and the Holt-Winters with amAPE of 1.03%and amSE:of 0.083.

关键词： Forecasting infant mortality rate ARImA NNAR holt-winters SutteARImA