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electroslag Ref.ning of.CrNim.Wm.V Ultrahigh-Strength Steel

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Journal of.m.nerals and m.terials Characterization and Engineering 2017年第6期5卷 385-407页

作者： m.ham.ed Ali m.m.ouh Eissa Hoda el f.ram.wy David Porter Jukka K&oum. m. m. f. el-shahat Taha m.ttar m.terials Engineering and Production Technology University of Oulu Oulu Finland Steel Technology Departm.nt Central Metallurgical Research and Development Institute Cairo Egypt Chem.stry Departm.nt Ain Shams University Cairo Egypt

Increasing dem.nds f.r ultrahigh-strength steels in com.ercial as well as m.litary applications have raised interest in f.nding alternatives to the high-cost high-alloyed steel and super-alloys currently used, e.g. the use of.econom.c low-alloy com.ositions processed via low-cost air induction m.lting and electroslag ref.ning (ESR). In this work the yield of.alloying elem.nts and the rem.val of.the im.urities nitrogen, sulphur and phosphorus as a result of.electroslag ref.ning (ESR) in a newly developed CrNim.Wm.V ultrahigh-strength steel (UHSS) have been studied in relation to their activities in the m.lten m.tal pool. Six experim.ntal heats of.CrNim.Wm.V UHSS with dif.erent chem.cal com.ositions were designed, m.lted in an induction f.rnace (If. and ref.ned using ESR. This was f.llowed by hot f.rging of.the ingots at 1100°C to 950°C. ESR using a Caf.-CaO-Al2O3 slag system.led to a high yield in Cr, Ni, m., W, m. and V, while the yield of.Si is low. The desulphurization of.all six UHSS grades was pronounced with m.st of.the sulphur rem.ved either to the slag or by gas reactions. The degree of.dephosphorization was only 5% irrespective of.the steel com.osition. On the other hand, denitrif.cation (rem.val of.nitrogen) was achieved. It ranged f.om.8% to 63% depending on the steel com.osition. The yield of.the alloying elem.nts and rem.val of.im.urities f.om.the steel during ESR depends on the chem.cal and physical properties of.the ESR slag and the activity of.the elem.nts in the m.lten state, taking into account elem.ntal interactions.

关键词： Ultrahigh-Strength Steel electroslag Ref.ning Alloying elem.nts Im.urities Activity

Som. studies of.the interaction between two two-level atom. and SU(1,1) quantum.system.

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Chinese Physics B 2018年第10期27卷 116-122页

作者： T m.el-shahat m.Kh Ism.il f.culty of.Science Al-Azhar University. Assiut 71524 Egypt

Herein, we present an approach to look f.r the best phenom.non to m.asure quantum.correlation. The system.of.two isolated qubits each interacting with a single-m.de cavity was theoretically created to study the quantum.correlation. Som. of.the phenom.na, such as the quantum.discord and concurrence, were generated through such a system. The inf.uences of.initial state purity, qubit m.tion, and detuning param.ters were discussed f.r the phenom.na. These param.ters f.r a specif.c value show that the behavior of.phenom.na are analogous. It is interesting to m.ntion that som. values of.detuning undergo a sudden death of.phenom.na, and the quantum.discord still captures the qubits quantum.correlation. We predict that the quantum.discord m.y be a better m.asure of.quantum.correlation than concurrence.

关键词： an isolated atom.with a cavity SU (1,1) quantum.discord concurrence

Ef.ect of.Y^(3+), Gd^(3+) and La^(3+) dopant ions on structural, optical and electrical properties of.o-m.llite nanoparticles

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Journal of.Rare Earths 2014年第1期32卷 37-42页

作者： m.m.S.Sanad m.m.Rashad E.A.Abdel-Aal m.f.el-shahat K.Powers Central m.tallurgical R & D Institute Particle Engineering Research Center University of Florida f.culty of.Science Ain Shams University

Dielectric ceram.cs of.m.x）Al6（1-x）Si2O13 doped m.llite were synthesized via co-precipitation technique. The X-ray dif.rac-tion prof.les revealed that these nanoparticles were crystallized well and the volum. of.m.llite unit cell was increased as a f.nction of.the ionic radius of.dopant ion. TEm.im.ges showed regular orthorhom.ic crystal m.rphology f.r the pure m.llite sam.le. m.anwhile, the doped sam.les exhibited slightly distorted crystal m.rphology of.larger particle sizes. DSC therm.gram. evinced that the exo-therm.c peak tem.erature of.m.llite was shif.ed to the lower value with m.＋ion insertion. The photolum.nescence spectra were stud-ied f.r m.llite sam.les, and it was f.und that the intensity of.the em.ssion spectra was af.ected by the m.＋ion type. It was f.und that, Y3＋doped m.llite achieved the m.nim.m.dielectric loss value of.0.01 in the radio wave f.equency region （1 m.z）. m.anwhile, Gd3＋doped m.llite achieved the m.nim.m.dielectric loss value of.0.09 in the m.crowave f.equency region （1 GHz）.

关键词： rare earths doped m.llite photolum.nescence crystallization tem.erature dielectric ceram.cs

Com.lem.nt-dependent neuroinf.am.ation in spinal cord injury:f.om.pathology to therapeutic im.lications

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Neural Regeneration Research 2025年第5期20卷 1324-1335页

作者： Hassan Saad Bachar el Baba Ali Tf.ily f.ras Kobeissy Juanm.rco Gutierrez Gonzalez Daniel Ref.i Gerald R.Rodts Christian m.stroph David Gim.el Jonathan Grossberg Daniel L.Barrow m.tthew f.Gary Ali m.Alawieh Departm.nt of.Neurosurgery Emory University School of MedicineAtlantaGAUSA Departm.nt of.Neurology Yale UniversityNew HavenCTUSA Center f.r Neurotraum. Multiomics&Biomarkers(CNMB)Morehouse School of MedicineAtlantaGAUSA

Spinal cord injury rem.ins a m.jor cause of.disability in young adults,and beyond acute decom.ression and rehabilitation,there are no pharm.cological treatm.nts to lim.t the progression of.injury and optim.ze recovery in this *** the thorough investigation of.the com.lem.nt system.in triggering and propagating cerebral neuroinf.am.ation,a sim.lar role f.r com.lem.nt in spinal neuroinf.am.ation is a f.cus of.ongoing *** this work,we survey the current literature investigating the role of.com.lem.nt in spinal cord injury including the sources of.com.lem.nt proteins,triggers of.com.lem.nt activation,and role of.ef.ector f.nctions in the *** study relevant data dem.nstrating the dif.erent triggers of.com.lem.nt activation af.er spinal cord injury including direct binding to cellular debris,and or activation via antibody binding to dam.ge-associated m.lecular *** ef.ector f.nctions of.com.lem.nt have been im.licated in spinal cord injury,and we critically evaluate recent studies on the dual role of.com.lem.nt anaphylatoxins in spinal cord injury while em.hasizing the lack of.pathophysiological understanding of.the role of.opsonins in spinal cord *** this pathophysiological review,we system.tically review the dif.erent translational approaches used in preclinical m.dels of.spinal cord injury and discuss the challenges f.r f.ture translation into hum.n *** review em.hasizes the need f.r f.ture studies to dissect the roles of.dif.erent com.lem.nt pathways in the pathology of.spinal cord injury,to evaluate the phases of.involvem.nt of.opsonins and anaphylatoxins,and to study the role of.com.lem.nt in white m.tter degeneration and regeneration using translational strategies to supplem.nt genetic m.dels.

关键词： com.lem.nt neuroinf.am.ation neuroplasticity regeneration spinal cord injury targeted therapy

m.delling of.Gettering by m.chanical Dam.ge of.m.tallic Im.urities in Silicon

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Chinese Physics Letters 2006年第11期23卷 3058-3060页

作者： f. Ayad m. Rem.am Departm.nt of.electronics University of Mentourl Route of Ain El-Bay Constantine 25000 Algeria

Reducing the concentration of.the m.tallic im.urities present in silicon-based electronic com.onents plays a vital role in m.nuf.ctures. Gettering by induced m.chanical dam.ge is one of.the m.thods used in neutralizing these im.urities. To sim.late this type of.gettering, we explicitly include the role of.the traps due to m.chanical dam.ge, based on the m.chanism.of.kick-out. In our m.del, we choose the essential param.ters including concentration of.im.urities, thickness, tem.erature, tim., etc. The dif.usion coef.icient and equilibrium.concentration of.the silicon interstitials estim.ted f.om.the literature have been adjusted to be in good agreem.nt with the experim.ntal data.

关键词： DIf.USION GOLD

f.oc m.al as potential substitute f.r soybean m.al in tilapia diets under biof.oc system.conditions

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Journal of.Oceanology and Lim.ology 2019年第1期37卷 313-320页

作者： Rania S. m.BROKE Osam. m. el-HUSSEINY Abd el-Naem.f. A. ZIDAN Al-Azab TAHOUN Ashraf.SULOm. f.sh Nutrition Laboratory (f.L) Animal Production Department Faculty of Agriculture Cairo University Aquaculture Departm.nt Faculty of Fish ResourcesSuez University

This study was conducted to evaluate the ef.f.ct of.replacing soybean m.al(SBm. by low protein ?oc m.al(LPf.0} 24% CP) in tilapia diets on growth perf.rm.nce, f.ed utilization and ?sh chem.cal com.osition. Three isonitrogenous and isocaloric diets were f.rm.lated; control diet(C; without LPf.0},f.0}25(25% of.SBm.protein was substituted by LPf.0} and f.0}50(50% of.SBm.protein was substituted by LPf.0}. Nine 55 l circular plastic tanks were stocked by 12 ?sh to f.rm.three experim.ntal *** dif.f.rences in tilapia perf.rm.nce were observed between the control and the f.0}25 diet. Chem.cal com.osition of.?sh did not dif.f.r signi?cantly am.ng treatm.nts except f.r protein and selenium.contents where the highest values were recorded in the control treatm.nt. The highest m.neral content was recorded in ?oc collected f.om.the control tanks, while calcium.content showed its highest value in ?oc collected f.om.f.0}50 e ? uent. These data indicate that replacing soybean m.al with LPf.0}up to 25%, had no negative ef.f.ct on growth perf.rm.nce and potentially m.y im.rove the system.sustainability. m.anwhile, the adverse ef.f.ct of.m.re inclusion of.LPf.0}in tilapia diet m.y be attributed to the higher content of.ash. In other word,m.nerals seem.to cause m.re energy utilization in ?sh f.d ?oc m.al since it is needed to m.intain osm.tic hom.ostasis.

关键词： m.crobial f.ocs alternative protein sources tilapia diet sustainability

Ef.ect of.substitution group on dielectric properties of.4H-pyrano [3,2-c] quinoline derivatives thin f.lm.

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Chinese Physics B 2016年第7期25卷 440-449页

作者： H m.Zeyada f.m.el-Taweel m.m.el-Nahass m.m.el-Shabaan Departm.nt of.Physics Faculty of Science Damietta University Departm.nt of.Chem.stry Faculty of Science Damietta University Departm.nt of.Physics Faculty of Education Ain Shams University

The AC electrical conductivity and dielectrical properties of.2-am.no-6-ethyl-5-oxo-4-（3-phenoxyphenyl）-5,6-dihydro-4H-pyrano[3, 2-c]quinoline-3-carbonitrile（Ph-HPQ） and 2-am.no-4-（2-chlorophenyl）-6-ethyl-5-oxo-5,6-dihydro-4H-pyrano [3, 2-c] quinoline-3-carbonitrile（Ch-HPQ） thin f.lm. were determ.ned in the f.equency range of.0.5 k Hz–5 m.z and the tem.erature range of.290–443 K. The AC electrical conduction of.both com.ounds in thin f.lm.f.rm.is governed by the correlated barrier hopping（CBH） m.chanism. Som. param.ters such as the barrier height, the m.xim.m.barrier height, the density of.charges, and the hopping distance were determ.ned as f.nctions of.tem.erature and f.equency. The phenoxyphenyl group has a greater inf.uence on those param.ters than the chlorophenyl group. The AC activation energies were determ.ned at dif.erent f.equencies and tem.eratures. The dielectric behaviors of.Ph-HPQ and Ch-HPQ were investigated using the im.edance spectroscopy technique. The im.edance data are presented in Nyquist diagram. f.r dif.erent tem.eratures. The Ch-HPQ f.lm. have higher im.edance than the Ph-HPQ f.lm.. The real dielectric constant and dielectric loss show a rem.rkable dependence on the f.equency and tem.erature. The Ph-HPQ has higher dielectric constants than the Ch-HPQ.

关键词： thin f.lm. quinoline derivatives dielectrical properties correlated barrier hopping

m.latonin and schistosom.l antigens am.liorate the anti-oxidative and biochem.cal response to Schistosom. m.nsoni inf.ction in ham.ter

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Current Zoology 2009年第2期55卷 165-172页

作者： Nahla S. el-SHENAWY m.ha f. m. SOLIm.N Shim.a E. Abel-RAHm.N Zoology Departm.nt Faculty of ScienceSuez Canal University

The present study was designed to investigate the potential protective ef.ect of.m.latonin as an antioxidant separately or in com.ination with antigens （cerearial; CAP or soluble worm. SWAP） against Schistosom. m.nsoni inf.ction in ham.ters. Each ham.ter was sensitized with an initial im.unization of.0.6 m. of.the extracted antigen （30μg protein/m.）. Af.er f.ur days, a second injection of.0.4 m. was given （20μg protein/m.）. Then, each ham.ter was exposed to 260 ± 20 S. m.nsoni cercariae f.llowed with m.latonin treatm.nt （3.5 m./kg） f.r thirty days f.om.the 1st day of.post inf.ction. Levels of.lipid peroxidation （LPO） products, eatalase （CAT） activity, hepatic glutathione （GSH） and biochem.cal changes in the liver and kidneys f.nctions were investigated. The results revealed a high signif.cant increasing of.LPO and decreasing of.CAT and GSH in liver of.inf.cted ham.ters. Biochem.cal observations showed severe dam.ge in the liver enzym. activities and increasing cholesterol level in inf.cted anim.ls. m.latonin co-treatm.nt with antigen to the inf.eted-ham.ter attenuated the increase of.LPO and restored the activity of.CAT and levels of.hepatic GSH. Also, the biochem.cal dam.ges in the liver and kidneys f.netions were reduced. The present study suggests that m.latonin m.y be usef.l in com.ating f.ee radical-induced dam.ge due to inf.ction toxicity. The im.unization with previous antigens resulted in a rem.rkable im.rovem.nt on the liver enzym. activities, which were increased af.er inf.ction. Thus, vaccination of.ham.ters with antigens （both CAP and SWAP） and m.latonin treatm.nt has m.re potent ef.ect on the enhancem.nt of.antioxidant and biochem.cal of.S. m.nsoni inf.cted-ham.ter than each treatm.nt separately. Im.unization of.the ham.ter with SWAP f.llowed by m.latonin was the best way am.ng the other regim. treatm.nts to im.rove the biochem.cal and antioxidant param.ters of.the inf.cted-ham.ters.

关键词： Lipid peroxidation Catalase Glutathione Cholesterol Uric acid Creatinine Enzym.s activity m.latonin Antigen Schistosom. m.nsoni

Valorization of.sustainable vegetable oil deodorizer distillate as a novel f.tliquor

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Collagen and Leather 2023年第3期5卷 60-72页

作者： el-shahat H.A.Nashy Adel Gabr Abdel-Razek m.nar m.hm.ud m.Hassanein Ghada A.Abo-elwaf. Ham.d elsayed Chem.cal Industries Research Institute National Research CentreDokkiCairo 12622Egypt Departm.nt of.f.ts and Oils National Research CentreDokkiCairo 12622Egypt

The deodorizer distillate(DD)is a byproduct of.vegetable oil processing industry and is rich in f.nctional bioactive *** study aim.d to em.loy phosphorylation m.dif.cation f.r DD to produce a new sustainable *** bioactive ingredients in DD,nam.ly f.tty acids,sterols,and tocopherols,were determ.ned by using HPLC and *** results revealed that the DD sam.le contained a high percentage of.unsaturated f.tty acids(72.3%)and high levels of.andδ-tocopherols(54.8%and 31.60%,respectively).m.chanical param.ters(tensile strength,elongation at break,and tear strength)of.leather were im.roved af.er being treated with the prepared f.tliquor ***,SEm.showed that the texture of.the f.tliquored leather had been rem.rkably ***,the f.tliquored leather possessed ef.ective antibacterial ef.ect against the specif.ed+ve,-ve bacteria,and Candida albicans *** strength,f.llness,sof. handle,and elasticity of.leather were all im.roved,and the grain of.leather was protected f.om.becom.ng loose af.er drying.

关键词： Vegetable oil Deodorizer distillate Bioactive com.onents f.tliquor Phosphorylation Chrom. tanned leather