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Journal of Ch.mistry and Ch.mical Engineering 2012年第2期6卷 158-172页

作者： ahmed h. abdel-salam h.mmat A. EI-Badawy Tah.ni EI-Zayat Department of Ch.mistry Faculty of Science Alexandria University Alexandria 21321 Egypt Department of Ch.mistry Faculty of Science Tabuk University Tabuk 71491 Kingdom of Saudi Arabia

A new series of dimeric Cu（II） and Ni（II） complexes with.some aroylh.drazones of a-pyridoin were synth.sized and ch.racterized using different ph.sical tech.iques. Th.ir ch.mical formulae were based on th.ir microanalysis and IR data. Th. structures of th. solid complexes were determined from th. electronic, IR and ESR spectral studies as well as th.ir magnetic susceptibility measurements. Th. ligands acted as bi-, tri- and tetra-dentate forming different dinuclear complexes with.different structures. Th. assumed molecular structures based on th. experimental results were also confirmed by th. molecular mech.nics calculations. Th. extraction ability of th. h.drazones h.s been investigated by liquid-liquid extraction for Cu（II） and Ni（II）.

关键词： h.drazones complexes spectra th.rmal analysis solvent extraction.

Kinetics of Oxidation of 2,6-Dimeth.lph.nol (DMP) Using Novel μ-Carbonato [(Pip)_4nCu₄X₄(CO₃)₂] Complexes

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Open Journal of Inorganic Ch.mistry 2016年第3期6卷 183-194页

作者： Moh.med A. El-Sayed h.da A. Elwakeil ahmed h. abdel salam h.mmat A. Elbadawy Ch.mistry Department Faculty of Science Alexandria University Alexandria Egypt Ch.mistry Department Faculty of Science University of Jeddah Jeddah KSA

Th.s paper reports th. kinetics of th. oxidation of 2,6-dimeth.lph.nol (DMP) to get 3,3’,5,5’-tetra- meth.l-4,4’-diph.noquinone (DPQ) using novel oxidative coupling complexes [(Pip)4nCu4X4-(CO3)2] (n = 1 or 2, X = Cl or Br, Pip = piperidine). Th. new prepared tetranuclear complexes were ch.racterized using cryoscopic measurements, electronic spectra, FTIR, EPR and cyclic voltammetry tech.iques. Th.se complexes are catalytically active. Th. proposed mech.nism of th. catalytic oxidative coupling can be illustrated as a pre-equilibrium, K, between th. catalyst and DMP to form a complex intermediate wh.ch.is converted to activated complex th.ough.th. rate determining step, k2, to form th. final product. Th. inverse of th. observed rate constants kobsd versus 1/[DMP]2 gives a straigh. line with.intercept. From th. slope and th. intercept, both.K and k2 are obtained. At different temperatures, th.rmodynamic and kinetic parameters are evaluated. It is worth.to mention th.t, th. dependence of kobsd on [DMP]2 indicates th.t th. coordination number for every copper center in both.n = 1 or 2 in [(Pip)4nCu4X4(CO3)2] is equal to six. Th.refore, carbonato bridging centers in n = 1 acts as a tridentate ligand, wh.le for n = 2 acts as a bidentate ligand.

关键词： Catalysts Kinetics Th.rmodynamic Copper Complexes

Synth.sis and Ch.racterization of Novel μ-Carbonato Tetranuclear Copper Complexes [(Pip)_4nCu₄X₄(CO₃)₂] in Aprotic Media

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Open Journal of Inorganic Ch.mistry 2016年第1期6卷 66-75页

In th.s work, novel oxidative coupling complexes, [(Pip)4nCu4X4(CO3)2] (n = 1 or 2, X = Cl or Br, Pip = piperidine), are synth.sized from th. reaction of well ch.racterized Lewis base [(Pip)4nCu4X4O2] with.carbon dioxide as a Lewis acid in Ch.sub>2Cl2. Th.se carbonato-derivatives are isolated as stable solids. Th.y are easily soluble in aprotic solvents as Ch.sub>2Cl2or ph.O2. Cryoscopic measurements support tetranuclear structure for all of th.m. Electronic spectra in th. near infrared with.h.gh.molecular absorptivity may be explained for tetranuclear cuban structure to fulfil 3 h.lo-ligands for each.copper centre in [(Pip)4nCu4X4(CO3)2]. Th. EPR spectra for [(Pip)4nCu4X4(CO3)2] complexes are axial type of spectra (dx2-y2 G.S) suggesting elongated tetragonal distortion for all of th.m. Cyclic voltammograms for [(Pip)4nCu4X4(CO3)2] are irreversible in ch.racter. Th.se tetranuclear carbonato complexes sh.w catalytical activity. Th.y initiate th. oxidation of 2,6-dimeth.lph.nol (DMP) to 3,3’,5,5’-tetrameth.l-4,4’-diph.noquinone (DPQ).

关键词： Complexes Tetranuclear Cuban Carbonato Bridge Copper

Periodate Oxidation of a Ternary Complex of Nitrilotriacetatoch.omium(III) Involving ß-Alanine as Co-Ligand

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Open Journal of Inorganic Ch.mistry 2018年第4期8卷 91-104页

作者： h.ssan A. Ewais ahmed h. abdel-salam Amal S. Basaleh.Moh.med A. h.bib Ch.mistry Department Faculty of Science King Abdulaziz University Jeddah KSA Ch.mistry Department Faculty of Science University of Jeddah Jeddah KSA Ch.mistry Department Faculty of Science Al-Tahadi University Serit Lybia

Th. kinetics of th. periodate oxidation of ch.omium(III)-complex, [CrIII(NTA)(Ala)(h.O)]-(NTA = Nitrilotriacetate and Ala = ß-alanine) to Cr(VI) h.ve been carried out for th. temperature range 15°C - 35°C under pseudo-first order conditions, >>?[complex]. Reaction obeyed first order dependence with.respect to and [Cr(III)], and th. rate of reaction increases with.increasing of ph.for th. range 3.40 - 4.45. Experimentally, th. mech.nism of th.s reaction is found to be consistent with.th. rate law in wh.ch.th. h.droxo species, [CrIII(NTA)(Ala)(Oh.]2- is considerably much.more reactive th.n th.ir conjugate acid. Δh. and ΔS* h.ve been calculated. It is proposed th.t electron transfer occurs th.ough.an inner-sph.re mech.nism via coordination of to ch.omium(III).

关键词： Nitrilotriacetatoch.omium(III) Ternary Complex Periodate Oxidation Inner-Sph.re Mech.nism Th.rmodynamic Activation Parameters

h.mogeneous Oxidative Coupling Catalysts： Reactivity of [（Pyr）nCuX]4O2 with.Carbon Dioxide to Generate New Active Initiators [（Pyr）nCuX]4（CO3）2 （n = 1 or 2, X = Cl, Br or I, Pyr = Pyrrolidine）

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Journal of Ch.mistry and Ch.mical Engineering 2012年第1期6卷 74-83页

作者： Moh.med A. EI-Sayed ahmed h. abdel-salam h.sh.m A. Abo-EI-Dah.b h.ba M. Refaat Division of Medical Ch.mistry Faculty of Medicine Jazan University Jazan 45142 Saudi Arabia Department of Ch.mistry Faculty of Science King Abdul-Aziz University Jeddah 21589 Saudi Arabia Department of Ch.mistry College of Applied Sciences Umm-AlQura University Makkah 21421 Saudi Arabia Department of Ch.mistry Faculty of Science Alexandria University Alexandria 21321 Egypt

Th.s paper represents th. interaction of well ch.racterized Lewis base [（Pyr）nCuX]4O2, n = 1 or 2, X = Cl, Br or I, Pyr = pyrrolidine with.CO2 as a Lewis acid to produce new series of oxidative coupling and catech.l oxidase initiators [（Pyr）nCuX]4（CO3）2. Th.se carbonato derivatives are isolated as stable solids. Th.y are easily soluble in aprotic solvents as Ch.Cl2 or Ph.O2. Cryoscopic measurements support tetranuclear core structure for all of th.m. Infrared spectra sh.w differences from th.ir oxo analogous in th. carbonato domains but th.se differences did not distinguish.between tridentate bridging carbonato and bidentate one. Rate of oxidation of 2,6-dimeth.lph.nol （DMP） by [（Pyr）CuCl]4（CO3）2, supports coordination number six for Cu（Ⅱ） centers in [（Pyr）CuCl]4（CO3）2. In order to fulfill coordination number six, for n = 1, carbonate will act as tridentate wh.le for n = 2, it will act as bidentate, as sh.wn in Sch.me 4. Near infrared spectra indicate a [（3 h.lo） Cu（Ⅱ） ch.rge transfer] for [（Pyr）nCuX]4（CO3）2, n = 1 or 2, X = Cl or Br. Low molecular absorptivities of th. maxima at 825 nm and 730 nm for [（Pyr）nCuI]4（CO3）2, n = 1 or 2 with.a minimum of h.gh.molecular absorptivities at 600 nm, comparing to X= CI or Br analogous, support a step structure for [（Pyr）,Cul]4（CO3）2, as sh.wn in Sch.me 5. Cyclic voltammograms for [（Pyr）nCuX]4（CO3）2; n = 1 or 2, X = CI or Br, are irreversible in ch.racters.

关键词： Tetranuclear carbonato copper (Ⅱ) h.mogeneous oxidative coupling catalysts.

Evaluating mech.nism of banana pseudo-stem retting using seawater:A cost-effective surface pre-treatment approach

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Journal of Bioresources and Bioproducts 2024年第3期9卷 322-335页

作者： Prince h.tor ahmed h.h.ssanin Osbert Akatwijuka Moh.med A.h.Gepreel Mitsuo Yamamoto Yukie Saito ahmed abdel-Mawgood Egypt-Japan University of Science and Tech.ology Biotechnology ProgramAlexandria GovernorateNew Borg Al Arab 21934Egypt Alexandria University Department of Textile EngineeringAlexandria GovernorateBab Sharqi 5424041Egypt Egypt-Japan University of Science and Tech.ology Material Science and EngineeringAlexandria GovernorateNew Borg Al Arab 21934Egypt Graduate Sch.ol of Agricultural and Life Sciences The University of TokyoBunkyo-KuTokyo 113-8657Japan

Retting h.s been employed to extract natural fibers from agricultural wastes as a biological and cost-effective approach.for *** its global abundance,banana pseudo-stem is a promising agro-waste for lignocellulosic fiber *** th.s study,fibers were extracted from th. pseudo-stems after being pre-treated under four conditions using seawater at room temperature for up to 35 d Bacterial isolation from th. fresh.seawater sample and screening for ligninolytic ability were *** load as well as laccase and manganese peroxidase enzyme activity profile assay during th. retting duration were *** transform infrared(FT-IR)and X-day diffraction(XRD)analyses were also examined for both.pre-treated and untreated extracted *** results sh.ws th.t six out of th. eigh. bacterial isolates h.d th. ability to degrade *** treatments(Raw stem+Raw seawater)and(Autoclaved stem+Raw seawater)recorded th. h.gh.st viable bacterial load of 9.24×102 and 4.46×102 CFU,respectively,on th. 14th.day of th. retting ***,th. h.gh.st laccase and manganese peroxidase enzymes activity was recorded for(Raw stem+Raw seawater)and(Autoclaved stem+Raw seawater)treatments in th. second to th. th.rd *** FT-IR spectra of th. pre-treated fibers revealed relative reductions in peaks attributed to polysacch.rides and oth.r amorph.us substances for all retting *** XRD diffractogram revealed th.t th. crystallinity index(CI)of pre-treated fibers increased in all seawater retting treatment ***,th. CI for fibers pre-treated under enzymatic conditions were enh.nced even after five *** analysis for selected bacterial isolates sh.wed h.mology to sequences of Bacillus velezensis,Sh.wanella sp.L8–5,and Citrobacter amalonaticus and Bacillus subtilis j8 *** th.se findings,it was suggested th.t ph.sical,biological,and ch.mical actions were collectively involved in th. seawater retting process of banana ps

关键词： Seawater retting Banana pseudo-stem Natural fiber Enzyme activity Colony forming unit

Ultralong h.droxyapatite-based forward osmosis membrane for fresh.ater generation

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Frontiers of Ch.mical Science and Engineering 2024年第9期18卷 37-49页

作者： Moh.med Gamal Gomaa h.mdy Maamoun abdel-Gh.far Francesco Galiano Francesca Russo Alberto Figoli El-Sayed Ali abdel-Aal abdel-h.kim Tah. Kandil Bah.a ahmed Salah Central Metallurgical Research.and Development Institute(CMRDI) 11421 CairoEgypt Ch.mistry Department Faculty of ScienceHelwan University11795 CairoEgypt Institute on Membrane Tech.ology(CNR-ITM) 87036 RendeItaly

Increasing global water sh.rtages are accelerating th. pace of membrane manufacturing,wh.ch.generates many environmentally h.rmful *** ch.llenges need a radical reth.nk of developing innovative membranes th.t can address fresh.ater production with.ut generating environmentally h.rmful *** work utilized th. synth.sized ultra-long h.droxyapatite(Uh.)by th. solvoth.rmal meth.d using th. green solvent oleic acid in preparing Uh.-based forward osmosis *** membranes were developed using different loading ratios of graph.ne oxide(GO)by vacuum-assisted filtration *** prepared GO/Uh. membranes were identified using X-ray diffraction,scanning electron microscope,Fourier-transform infrared spectroscopy,and X-ray ph.toelectron *** contact angle and pore size distribution were determined for th. obtained GO/Uh. *** obtained h.erarch.cal porous structure in th. prepared membranes with.interconnected ch.nnels results in a stable water flux with.reverse salt *** best water flux rate of 42±2 L·m^(–2)·h.(–1)was ach.eved using th. 50 mg GO/Uh. membrane,wh.ch.is 3.3 times h.gh.r th.n th. pristine membrane,and a reverse salt flux of 67 g·m^(-2)·h.(–1).Th. obtained results sh.wed a promising capability of a new generation of sustainable inorganic-based membranes th.t can be utilized in fresh.ater generation by energy-efficient tech.iques such.as forward osmosis.

关键词： forward osmosis ultra-long h.droxyapatite graph.ne oxide inorganic-based membrane

Experimental validation of double-fed induction generator in oscillating water column using circulatory system-based optimization

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Clean Energy 2024年第2期8卷 127-143页

作者： Basem E.Elnagh. ahmed M.Ismaiel Fath. El Sayed abdel-Kader Reh.m h.Moh.mmed M.N.Abelwh.b Electrical Power and Mach.ne Department Suez Canal UniversityIsmailiaEgypt Electrical Power and Mach.ne Department Menoufia UniversityMenoufiaEgypt Computer and Control Department Suez Canal UniversityIsmailiaEgypt

Th.s paper validates th. optimal operation for a grid-connected double-fed induction generator(DFIG)in an oscillating water column power plant(OWCPP).Th.s study presents a novel optimization tech.ique called th. circulatory system-based optimization(CSBO)approach.to develop six adaptive fuzzy logic controllers(AFLCs)with.30 parameters and compare th.m to ch.otic-billiards optimization(C-BO)and genetic algorith.(GA).Th. proposed controller is also compared with.a proportional-integral differential(PID)controller based on a self-adaptive global-best h.rmony search.SGh.).CSBO-based AFLCs are fully investigated under different scenarios and experimented with.using a real-time interface *** results of using CSBO-AFLCs revealed a fast time response,fast convergence,less oversh.ot and minimal error compared with.th.se ach.eved with.C-BO-AFLC,SGh.-PID and GA-AFLC during different case *** CSBO-based AFLCs ensure maximum power from th. DFIG in an OWCPP and enh.nce dynamic response with.very low *** results sh.w th.t th. CSBO sh.ws better power tracking by 25%as compared with.C-BO,by 45%wh.n compared with.th. GA and by 56%wh.n compared with.***,th. integral absolute errors of six controllers are investigated to demonstrate th. feasibility of *** root mean square of th. errors of six controllers using CSBO is improved by 68.27%wh.n compared with.GA,by 22.57%wh.n compared with.C-BO and by 38.42%wh.n compared with.*** indicators demonstrate th. feasibility of CSBO wh.n compared with.oth.r algorith.s with.th. same OWCPP.

关键词： circulatory system-based optimization approach adaptive fuzzy logic controller grid-tied oscillating water column power plant maximum power point tracking

Intermittent fasting and th. liver: Focus on th. Ramadan model

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World Journal of h.patology 2024年第8期16卷 1070-1083页

作者： Moh.med h.Emara h.nan Soliman Ebada M Said h.ssan Elbatae Mostafa Elazab Sh.dy Elh.fnawy Tarik I Zah.r ahmed abdel-Razik Moh.med Elnadry Department of h.patology Gastroenterology and Infectious DiseasesKafrelsheikh UniversityKafr-Elshikh 33516Egypt Department of Medicine Alyousif HospitalAlkhobar 34622Saudi Arabia Department of Tropical Medicine and Infectious Diseases Tanta UniversityTanta 31512Egypt Department of h.patology Gastroenterology and Infectious DiseasesBenha UniversityBenha 13511Egypt Department of Tropical Medicine Zagazig UniversityZagazig 44519Egypt Department of Tropical Medicine Mansoura UniversityMansoura 35516Egypt Department of h.pato-Gastroenterology and Infectious Diseases Al-Azhar UniversityCairo 11651Egypt

Intermittent fasting(IF)is an intervention th.t involves not only dietary modific-ations but also beh.vioral ch.nges with.th. main core being a period of fasting alternating with.a period of controlled *** duration of fasting differs from one regimen to *** fasting(RF)is a religious fasting for Muslims,it lasts for only one month.every one lunar *** th.s model of fasting,observers abstain from food and water for a period th.t extends from dawn to *** period of daily fasting is variable(12-18 h.urs)as Ramadan rotates in all seasons of th. ***,longer duration of daily fasting is observed during th. *** fact,RF is a peculiar type of *** is a dry IF as no water is allowed during th. fasting h.urs,also th.re are no calorie restrictions during feeding h.urs,and th. mealtime is exclusively *** th.ee variables of th. RF model are believed to h.ve a variable impact on different liver *** was evaluated by different observational and interventional studies among patients with.non-alcoh.lic fatty liver disease and it was associated with.improve-ments in anth.opometric measures,metabolic profile,and liver bioch.mistry regardless of th. calorie restriction among lean and obese *** situation is rath.r different for patients with.liver *** was associated with.adverse events among patients with.liver cirrh.sis irrespective of th. underlying etiology of *** patients developed new ascites,ascites were increased,h.d h.gh.r serum bilirubin levels after Ramadan,and frequently developed h.patic enceph.lopath. and acute upper gastrointestinal *** complications were h.gh.r among patients with.Ch.ld class B and C cirrh.sis,and some fatalities occurred due to *** transplant recipients as a special group of patients,are vulnerable to deh.dration,fluctuation in blood immunosuppressive levels,likelih.od of deterioration and h.nce observing RF with.ut special precautions

关键词： Intermittent fasting Ramadan fasting Non-alcoh.lic fatty liver disease Liver cirrh.sis Peptic ulcer Liver transplantation Gilbert syndrome

Enh.nced h.ap-Based Optimizer Algorith. for Solving Team Formation Problem

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Computers, Materials & Continua 2022年第12期73卷 5245-5268页

作者： Nash.a Nageh.ahmed Elsh.my abdel Wah.b Said h.ssan Mostafa Sami Mustafa Abdul salam Faculty of Science Suez Canal UniversityIsmailiaEgypt Faculty of Computers and Artificial Intelligence Helwan UniversityHelwanEgypt Faculty of Computers and Artificial Intelligence Benha UniversityBenha 13518Egypt Faculty of Computer Studies Arab Open UniversityCairoEgypt

Team Formation(TF)is considered one of th. most significant problems in computer science and *** is defined as forming th. best team of experts in a social network to complete a task with.least *** real-world problems,such.as task assignment,veh.cle routing,nurse sch.duling,resource allocation,and airline crew sch.duling,are based on th. TF *** h.s been sh.wn to be a Nondeterministic Polynomial time(NP)problem,and h.gh.dimensional problem with.several local optima th.t can be solved using efficient approximation *** paper proposes two improved swarm-based algorith.s for solving team formation *** first algorith.,entitled h.brid h.ap-Based Optimizer with.Simulated Annealing Algorith.(h.OSA),uses a single crossover operator to improve th. performance of a standard h.ap-based optimizer(h.O)*** also employs th. simulated annealing(SA)approach.to improve model convergence and avoid local minima *** second algorith. is th. Ch.otic h.ap-based Optimizer Algorith.(Ch.O).Ch.O aids in th. discovery of new solutions in th. search.space by directing particles to different regions of th. search.*** h.O’s optimization process,a logistic ch.otic map is *** performance of th. two proposed algorith.s(h.OSA)and(Ch.O)is evaluated using th.rteen bench.ark functions and tested in solving th. TF problem with.varying number of experts and ***,th. proposed algorith.s were compared to well-known optimization algorith.s such.as th. h.ap-Based Optimizer(h.O),Developed Simulated Annealing(DSA),Particle SwarmOptimization(PSO),GreyWolfOptimization(GWO),and Genetic Algorith.(GA).Finally,th. proposed algorith.s were applied to a real-world bench.ark dataset known as th. Internet Movie Database(IMDB).Th. simulation results revealed th.t th. proposed algorith.s outperformed th. compared algorith.s in terms of efficiency and performance,with.fast convergence to th. global minimum.

关键词： Team formation problem optimization problem genetic algorith. h.ap-based optimizer simulated annealing h.bridization meth.d ch.otic local search