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Controlled growth and composition of.multivariate metal-organic f.ameworks-199 via a reaction-dif.usion process

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Nano Research 2021年第2期14卷 423-431页

作者： Razan lssa f.yrouz abou Ibrahim Mazen Al-Ghoul Mohamad Hmadeh Department of.Chemistry American University of BeirutP.O.Box 11-0236RiadEl-Solh 11072020BeirutLebanon Department of.Chemistry McGill University801 Sherbrooke Street WestMontreal H2A 0B8Canada

In this paper,we exploit our prior successf.l synthesis of.MOf.199 single crystals using the reaction-dif.usion f.amework(RDf.,to synthesize multivariate metal-organic f.ameworks(MTV-MOf.)version with enhanced *** MTV-MOf. are synthesized by creating def.cts within the MOf.199 crystal structure by integrating organic linkers entailing dif.erent f.nctional ***,5-aminoisophthalic acid(NH_(2)-BDC)and 5-hydroxyisophthalic acid(OH-BDC)are separately mixed with 1,3,5-benzenetricarboxylic acid(BTC)in three dif.erent starting ratios of.X-BDC:BTC(1:3,1:1)and(3:1).The ef.ects of.this linker on the morphology of.the synthesized MTV-MOf.,their thermal stability,and their surf.ce area are *** extent of.the incorporation of.the linkers in the f.amework is elucidated via^(1)H-NMR spectroscopy and it is shown that the incorporation varies as a f.nction of.the location along the tubular reactor,a characteristic of.*** enhanced properties of.the synthesized MTV-MOf. are f.rther demonstrated by measuring its adsorptive capability f.r methylene blue(MB)and rhodamine B(Rh B)in aqueous solution,and compared with that of.the as-synthesized *** kinetic and thermodynamic studies reveal that MTV-MOf. with the ratio of.X-BDC:BTC(1:1)exhibit the best uptakes of.MB(263 mg/g)f.r X=OH and Rh B(156 mg/g)f.r X=NH_(2).The adsorbents are also easily regenerated f.r three consecutive cycles without losing their *** f.nally demonstrate that MTV-MOf. can be designed to tune the dye removal selectivity and enhance the removal capacity of.both MB and RhB in a binary aqueous solution of.these dyes.

关键词： reaction-dif.usion f.amework(RDf. multivariate metal-organic f.ameworks(MTV-MOf.) adsorption methylene blue(MB) rhodamine B(Rh B)

Novel Non-Protein Biomarkers f.r Early Detection of.Hepatocellular Carcinoma

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Engineering 2021年第10期7卷 1369-1374页

作者： Ghassan K.abou-Alf. Lin Wu Augusto Villanueva Memorial Sloan Kettering Cancer Center New York CityNY 10065USA Weill Medical College Cornell UniversityNew York CityNY 10065USA Berry Oncology Corporation Beijing 102200China Division of.Liver Diseases Division of Hematology/Medical OncologyLiver Cancer ProgramDepartment of MedicineTisch Cancer InstituteIcahn School of Medicine at Mount SinaiNew York CityNY 10029USA

Early detection of.hepatocellular carcinoma(HCC)while in its early stages is critical f.r reducing HCC mortality in high-risk ***,highly sensitive and specif.c surveillance biomarkers f.r early-stage HCC detection are still *** recent years,great ef.orts have been made to research tumor-derived molecular f.atures that are detectable in circulation,such as circulating tumor deoxyribonucleic acid and circulating tumor ribonucleic acid,in order to explore their potential as noninvasive biomarker candidates in many tumor *** this review,we summarize current studies on these new approaches and their application in early HCC detection.

关键词： Hepatocellular carcinoma Early detection Biomarkers Liquid biopsy

Congestion pricing strategies to investigate the potential of.route diversion on toll f.cilities using en-route guidance

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Journal of.Traf.ic and Transportation Engineering(English Edition) 2016年第1期3卷 59-70页

作者： Hatem abou-Senna Center f.r Advanced Transportation Systems Simulations (CATSS) Department of Civil Environmental and Construction Engineering (CECE) University of Central Florida

The application of.intelligent transportation systems （ITS） technologies to f.cilitate the traf.ic mobility requires dynamic routing decisions. This study examines the ef.ectiveness of.Paramics, a microscopic traf.ic simulation model that uses a link-to-link shortest path algorithm to consider both updated link travel times and incident conditions detected through dif.erent traf.ic assignment techniques. This paper describes modeling of.an urban highway network＇s traf.ic conditions to investigate potential route diversion through congestion pricing strategies on toll f.cilities in Orlando, f.orida using Paramics. The experimental design included a multi-level f.ctorial design with three qualitative variables and f.ur response quantitative variables. The experiment＇s objective was to investigate dif.erent scenarios f.r reducing tolls on less congested roads （SR528 and SR417） and increasing tolls on more congested roads （SR408） to determine the impact on travelers＇ route choices and overall congestion in the network. The simulation results demonstrate that the Dynamic f.edback Assignment （Df.） led to a reduction in the average queuing delay and average travel time when compared to results f.om the Stochastic Assignment （SA）. Df. signif.cantly af.ected the percentage of.diversion in the network. Drivers saved 10%-16% of.travel time when Df. inf.rmation was provided. Results also show that percentages of.route diversion vary f.om one route to another and depending on the travel cost between specif.c origin-destination pairs. While drivers incorporate real time guidance inf.rmation to maximize their own utility, not all drivers gain the same benef.t. This was attributed to the limited extra capacity of.the alternative routes and the longer travel distance. Combining congestion pricing strategies with traf.ic inf.rmation maximize travel time benef.ts.

关键词： ParamicsCongestion pricingToll roadRoute diversionDynamic assignmentIntelligent transportation systems

The ef.ect of.multi-intermediate bands on the behavior of.an InAs_(1-x)N_x/GaAs(1-y)Sb_y quantum dot solar cell

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Journal of.Semiconductors 2015年第4期36卷 1-6页

作者： abou El-Maaty M.Aly A.Nasr Power Electronics and Energy Conversion Department ERINRCB College of.Computer Qassim University Radiation Engineering Department NCRRTAtomic Energy Authority

A mathematical model of.quantum dot intermediate band solar cells （QDIBSCs） is investigated using two intermediate bands （IBs）. These two IBs arise f.om the quantum dot （QD） semiconductor material within the bandgap energy. Some parameters such as the width of.the QD （WQD） and the barrier thickness or the inter-dot distances between the QDs （BT） are studied to show their inf.uence on the perf.rmance of.the QDIBSC. The timeindependent Schr6dinger equation, which is solved using the Kronig-Penney model, is used to determine the posi- tion and bandwidth energies of.the two IBs. In our proposed model, the cubic shape of.the QDs f.om InAs0.9N0.1 and the barrier or host semiconductor material f.om GaAs0.98Sb0.02 are utilized. It is shown f.om the results obtained that changing the parameters WQD and Bx has more inf.uence on the bandwidth energy f.r the f.rst IB, A 1, than in the case of.the second IB, A2. The optimum power conversion ef.iciencies （PCEs） of.the QDIBSCs with two IBs f.r the model under study are 58.01% and 73.55% at 1 sun and maximum solar concentration, respectively. One can observe that, in the case of.the two IBs, an improvement of.the PCE is achieved.

关键词： intermediate bands solar cells quantum dots ef.iciency solar concentration

Ef.ects of.6-Month Weight Loss New Program on Anthropometric Measurements and Biological Prof.le

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Journal of.Pharmacy and Pharmacology 2016年第1期4卷 23-38页

作者： Asmaa f. Hamouda Saad El Dien A abou El Noeman Department of.biochemistry University of A lexandria Alexandria 21111 Egypt Department of.Medical biochemistry University of Tanta Tanta 31511 Egypt

Obesity has become a leading global health problem owing to its strong association with a high incidence of.diseases. Obesity is results f.om the complex interaction of.environmental f.ctors that act on a genetic background and led to excess accumulated of.body f.t. Treatment of.obesity includes determination of.the degree of.obesity, management weight loss programme and maintenance of.body weight. To investigate ef.ect 6 months saf. weight loss program on anthropometric measurements and biological and metabolic prof.les in obese patients. 35 obese patients were enrolled in the present study: 20 f.male, 15 male. Participants underwent a comprehensive series of.biochemical, anthropometrical, physical, and nutritional prior to treatment- at baseline and af.er the six-month of.the obesity treatment program. 6 months weight loss program. Diet plan intervention in small groups. In-person training and individual diet plan intervention. There is signif.cant reduction in weight and high improvement in laboratory parameters. Our data showed that there an improvement in weight loss. These f.nding may be important f.r controlling obesity-related co-morbidities. It would appear that moderate weight loss of.8-10 % observed in our study resulted in signif.cant improvements in laboratory parameters

关键词：人体测量减肥生物分布健康问题遗传背景相互作用环境因素生物代谢

Preparation and Characterization of.Eco-f.iendly Carboxymethyl Cellulose Antimicrobial Nanocomposite Hydrogels

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Journal of.Renewable Materials 2018年第5期6卷 536-547页

作者： Sawsan Dacrory Hussein abou-Yousef.Ragab E.abou-Zeid Samir Kamel Mohamed S.Abdel-Aziz Mohamed Elbadry Cellulose and Paper Department National Research Centre33 El Buhouth St.DokkiGiza 12622Egypt Microbial Chemistry Department National Research Centre33 El Buhouth St.DokkiGiza 12622Egypt Department of.Chemistry Faculty of ScienceAin Shams UniversityAbbassiaCairo 11566Egypt

Carboxymethyl cellulose hydrogels were developed through crosslinking process using eco-f.iendly crosslinkers such as maleic,succinic,and citric *** cellulose was prepared f.om the cellulosic f.action of.olive industry residues.A series of.hydrogels with varying crosslinker acid concentrations,reaction times,and reaction temperatures was produced to study the swelling capacities and gel f.action of.the obtained *** study pertains to the preparation of.antimicrobial nanocomposite hydrogels through in-situ incorporation of.the silver nanoparticles during the crosslinking *** nanoparticles were prepared by reduction of.AgNO3 with leaves of.Ricinus *** particle size of.prepared silver nanoparticles was detected by transmission electron microscopy(TEM).Chemical structure and morphological characterizations of.the prepared hydrogels were perf.rmed using f.urier transf.rm inf.ared spectroscopy(f.IR),scanning electron microscopy(SEM),and energy-dispersive X-ray spectroscopy(EDX).f.nally,the antimicrobial activity of.the loaded silver hydrogels against Gram negative(G-ve),Gram positive(G+ve),and Candida albicans yeast was demonstrated.

关键词： Hydrogel crosslinked carboxymethyl cellulose silver nanoparticles antibacterial activity

Ef.ects of.bimetallic catalysts on synthesis of.nitrogen-doped carbon nanotubes as nanoscale energetic materials

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Particuology 2011年第5期9卷 465-470页

作者： Hao Liu Yong Zhang Ruying Li Xueliang Sun Hakima abou-Rachid Department of.Mechanical and Materials Engineering University of Western Ontario London ON N6A 5B9 Canada Def.nse Research ＆ Development Canada 2459 Boulevard PieXI Nord Quebec QC G3J IX5 Canada

Well aligned nitrogen-doped carbon nanotubes （CNx-NTs）, as energetic materials, are synthesized on a silicon substrate by aerosol-assisted chemical vapor deposition, Tungsten （W） and molybdenum （Mo） metals are respectively introduced to combine with iron （f.） to act as a bimetallic co-catalyst layer. Cor- relations between the composition and shape of.the co-catalyst and morphology, size, growth rate and nitrogen doping amount of.the synthesized CNx-NTs are investigated by secondary and backscattered electron imaging in a f.eld emission scanning electron microscope （f.SEM） and X-ray photoelectron spectrometer （XPS）. Compared to pure iron catalyst, W-f. co-catalyst can result in lower growth rate, larger diameter and wider size distribution of.the CNx-NTs; while incorporation of.molybdenum into the iron catalyst layer can reduce the diameter and size distribution of.the nanotubes. Compared to the sole iron catalyst, f.-W catalyst impedes nitrogen doping while f.-Mo catalyst promotes the incorporation of.nitrogen into the nanotubes. The present work indicates that CNx-NTs with modulated size, growth rate and nitrogen doping concentration are expected to be synthesized by tuning the size and composition of.co-catalysts, which may f.nd great potential in producing CNx-NTs with controlled structure and properties,

关键词： Nitrogen doped carbon nanotubes Chemical vapor deposition Bimetallic catalyst

Ef.ect of.supplementing layer hen diet with phytogenic f.ed additives on laying perf.rmance, egg quality, egg lipid peroxidation and blood biochemical constituents

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Animal Nutrition 2018年第4期4卷 394-400页

作者： Reham abou-Elkhair Shaimaa Selim Eman Hussein Department of.Nutrition and Clinical Nutrition Faculty of Veterinary Medicine University of Sadat City Department of.Nutrition and Clinical Nutrition Faculty of Veterinary Medicine University of Menoufia Department of.Poultry Production Faculty of Agriculture University of Menoufia

This study was conducted to evaluate the ef.ects of.supplementing laying hen diet with phytogenic additives on laying perf.rmance, egg quality, blood constituents and egg lipid peroxidation. Two hundred Lohmann Brown Lite laying hens were randomly allotted to 4 dietary treatments: control(without phytogenic additive), f.nnel seeds(5 g/kg), black cumin seeds(5 g/kg) and hot red pepper(5 g/kg).Each of.the 4 diets was f.d to 5 replicates of.10 hens f.r 8 weeks. No signif.cant dif.erences were observed in body weight or f.ed intake between the groups. Dietary inclusion of.f.nnel f.llowed by red pepper improved(P f.ed conversion ratio compared with control. Higher yolk shape index, shell and albumen weight percentages and Haugh unit(P f.nnel supplemented group compared with control. The egg yolk color score increased by the addition of.f.nnel or hot red pepper in laying hen diets compared with control. The inclusion of.black cumin or hot red pepper decreased serum and egg yolk cholesterol and malondialdehyde concentrations(P f.rase concentration was lower in black cumin group(P f.rmance and egg quality were obtained by dietary inclusion of.f.nnel, f.llowed by hot red pepper and black cumin. Dietary supplementation of.black cumin or red pepper may lead to the development of.low-cholesterol concentration and better antioxidant capacity of.eggs.

关键词： Phytogenic additives Egg quality Hepatoprotective activity Lipid peroxidation Cholesterol Laying hens

Temperature and Doping Dependencies of.the Transport Properties within GaN and GaAs

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Journal of.Modern Physics 2011年第11期2卷 1324-1330页

作者： f. M. abou El-Ela A. Z. Mohamed 不详

Temperature and doping dependencies of.the transport properties have been calculated using an ensemble Monte Carlo simulation. We consider the polar optical phonon, acoustic phonons, piezoelectric, intervalley scatterings and Charged impurity scattering model of.Ridley;f.rthermore, a non nonparabolic three-valley model is used. Our simulation results have shown that the electron velocity in GaN is less sensitive to changes in temperature than that associated with GaAs. Also it is f.und that GaN exhibits high peak drif. velocity at room temperature, 2.8 × 105m/s, at doping concentration of.1 × 1020 m–3and the electron drif. velocity relaxes to the saturation value of.1.3 × 105 m/s which is much larger than that of.GaAs. The weakening of.the phonon emission rate at low temperature explains the extremely high low f.eld mobility. Our results suggest that the transport characteristics of.GaN are superior to that of.GaAs, over a wide range of.temperatures, f.om 100 K to 700 K, and doping concentrations, up to 1 × 1025

关键词： Monte Carlo Steady State Temperature Dependence Doping Dependence