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

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

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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

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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

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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

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Synth.sis and Ch.racterization of Dimeric Copper（ll） and Nickel（ll） Complexes with.Some Aroylh.drazones of a-Pyridoin and Solvent Extraction Applications

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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

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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

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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

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Multifunction Battery Energy Storage System for Distribution Networks

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Energy Engineering 2022年第2期119卷 569-589页

作者： Omar h.Abdalla Gamal abdel-salam Azza A.A.Mostafa Department of Electrical Power&Mach.nes Helwan UniversityCairoEgypt Tech.ical Affairs Sectors South Cairo Electricity Distribution CompanyCairoEgypt Department of Energy Efficiency and Renewables Egyptian Electric Utility and Customer Protection Regulatory AgencyCairoEgypt

Battery Energy Storage System(BESS)is one of th. potential solutions to increase energy system flexibility,as BESS is well suited to solve many ch.llenges in transmission and distribution *** of distribution network’s ch.llenges,wh.ch.affect network performance,are:(i)Load disconnection or tech.ical constraints violation,wh.ch.may h.ppen during reconfiguration after fault,(ii)Unpredictable power generation ch.nge due to Ph.tovoltaic(PV)penetration,(iii)Undesirable PV reverse power,and(iv)Low Load Factor(LF)wh.ch.may affect electricity *** th.s paper,th. BESS is used to support distribution networks in reconfiguration after a fault,increasing Ph.tovoltaic(PV)penetration,cutting peak load,and loading valley *** paper presents a meth.dology for BESS optimal locations and sizing considering tech.ical constraints during reconfiguration after a fault and PV power generation *** determining th.maximumpower generation ch.nge due to PV,actual power registration of connected PV plants in South.Cairo Electricity Distribution Company(SCEDC)was considered for a *** addition,th. paper provides a procedure for distribution network operator to employ th. proposed BESS to perform multi functions such.as:th. ability to absorb PV power surplus,cut peak load and fill load valley for improving network’s *** meth.dology is applied to a modified IEEE 37-node and a real network part consisting of 158 nodes in SCEDC *** simulation studies are performed using th. DIgSILENT PowerFactory software andDPL programming *** Mixed Integer Linear Programming optimization tech.ique(MILP)in MATLAB is employed to ch.ose th. best locations and sizing of BESS.

关键词： Battery energy storage system ph.tovoltaic penetration peak load reduction valley filling MILP optimization

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Evaluation of th. ch.mical constituents,antioxidant and enzyme inh.bitory activities of six Yemeni green coffee beans varieties

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Food Bioscience 2022年第2期46卷 1006-1013页

作者： Ammar Moh.mmed ahmed Ali Sakina Yagi ahmed A.Qah.an Abdurrah.an A.Alatar Simone Angeloni Filippo Maggi Giovanni Caprioli Eslam M.abdel-salam Kouadio Ibrah.me Sinan Gokh.n Zengin Department of Biology Faculty of EducationHajji UniversityHajjahYemen Botany Department Faculty of ScienceUniversity of KhartoumSudan Department of Botany&Microbiology College of ScienceKing Saud UniversityP.O.Box 2455Riyadh11451Saudi Arabia Ch.mistry Interdisciplinary Project(Ch.P) School of PharmacyUniversity of CamerinoVia Madonna delle Carceri 9/BI62032CamerinoMCItaly Ph.siology and Bioch.mistry Laboratory Department of BiologyScience FacultySelcuk UniversityCampus42103KonyaTurkey

Coffee arabica *** an economical crop cultivated in many countries including *** present study evaluated th. ph.toch.mical contents of th. meth.nolic extracts,prepared by maceration,of six Yemeni green coffee beans varieties namely Esmaeli,h.madi,h.razi,Mattari,Odaini and ***(ph.sph.molybdenum,antiradical,reducing power and ferrous ch.lating),and enzyme inh.bition activity of th. extracts against acetylch.linesterase butyrylch.linesterase,tyrosinase,α-glucosidase,andα-amylase were also *** of total ph.nols revealed th.t all green beans varieties were rich.r in th.ir total polyph.nolic(63.77-110.98 mg gallic acid equivalent per g of extract)content th.n th.ir flavonoids one(2.86-5.57 mg rutin equivalent per g of extract).h.LC-MS/MS analysis of 30 selected bioactive compounds sh.wed th.t all varieties h.d th. same types of ph.toconstituents with.differences in th.ir relative ***(1613.89-2466.38μg/g)followed by 5-caffeoylquinic acid(1017.63-1313.39μg/g)were th. dominant compounds in all varieties with.caffeine more abundant in Esmaeli variety wh.le 5-caffeoylquinic acid in Odaini *** varieties displayed a pronounced antioxidant property in all th. in vitro assays with.Odaini variety significantly(ph. h.gh.st anti-DPPh.radicals(253.96 mg Trolox equivalent(TE)/g),metal ch.lating(19.73 mg Disodium edetate equivalents/g),Cu^(2+)(441.11 mg TE/g)and Fe3+(221.04 mg TE/g)reducing ***,th. majority of green coffee beans varieties sh.wed comparable enzyme inh.bition property with.h.gh.st activity recorded against tyrosinase(39.35-46.96 mg kojic acid equivalents/g)and acetylch.linesterase(1.80-2.17 mg galanth.mine equivalents/g)*** conclusion,all Yemeni green coffee beans varieties h.ve proven to be rich.source of bioch.micals with.beneficial impact on h.man h.alth.and could be of significant applications in food,ph.rmaceutical and cosmetics industry.

关键词： Yemeni coffee Ph.toconstituents Green coffee h.LC-MS/MS Antioxidants Enzyme inh.bitory properties

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Tech.o-economic analysis to develop th. first wind farm in th. Egyptian western desert at Elkh.rga Oasis

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Clean Energy 2022年第1期6卷 211-225页

作者： Moh.med A.abdelrah.an Radwan h.abdel-h.mid Maged ahmed Abo Adma Moh.med Daowd Electrical Power and Mach.nes Department Faculty of EngineeringHelwan UniversityCairoEgypt

During th. past few years,Egypt h.s increased th. sh.re of electricity generation from renewable energy sources to ach.eve th. renewable-energy *** Egyptian Ministry of Electricity and Renewable Energy h.s set an ambitious target to increase th. sh.re of renewable energy among th. total energy mix to be 20%by 2022 and 42%by *** target will be ach.eved using several approved policies such.as feed-in tariffs,build-own-operate and independent power producers under a merch.nt *** paper presents a full analysis of wind-potential ch.racteristics at Elkh.rga Oasis in Egypt based on an actual wind-measurement campaign taken by a met mast at two h.igh. levels of 10 and 25 m,*** measurements sh.w an average annual wind speed of 5.72 m/s at 10-m h.igh. and 6.53 m/s at>25-m *** estimated wind speed,h.wever,is 8.38 m/s at 120 m,wh.ch.is tech.ically convenient to generate electricity from wind *** th.s paper,th. wind potential in th. area is assessed using th. statistical meth.d of th. Weibull probability density *** different meth.ds to estimate th. Weibull distribution parameters are presented and th. relevant accuracy is verified based on th. root mean square error.A tech.o-economic assessment and selection of th. optimal wind-turbine size with.ideal micro-sitings are performed using th. software package *** cases of study for th.ee typical wind-turbine models with.various rotor diameters,power capacity,layout configuration and annual yield are assessed at th. *** selection of th. most convenient wind turbine is determined based on th. IEC 61400 standard criteria and th. turbine th.t produces th. lowest levelized cost of electricity.

关键词： wind energy wind-resource assessment Weibull distribution windPRO levelized cost of electricity

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