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Gravitational collapse with standard and dark energy.in the teleparallel equivalent of general relativity

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Chinese Phy.ics B 2012年第6期21卷 57-62页

作者： gamal.G.L.Nashed Mathematics Department Faculty of ScienceKing Faisal UniversityP.O.Box 380 Al-Ahsaa 31982the Kingdom of Saudi Arabia Mathematics Department Faculty of ScienceAin Shams UniversityCairo11566Egypt Center for Theoretical Phy.ics British University of EgyptSherouk City 11837P.O.Box 43Egypt

A perfect fluid with self-similarity.of the second kind is studied within the framework of the teleparallel equivalent of general relativity.（TEGR）. A spacetime which is not asy.ptotically.fiat is derived. The energy.conditions of this spacetime are studied. It is shown that after some time the strong energy.condition is not enough to satisfy.showing a transition from standard matter to dark energy. The singularities of this solution are discussed.

关键词： perfect fluid with self-similarity.of second kind teleparallel equivalent of general relativ-ity asy.ptotically.nonflat spacetime energy.conditions

Characteristic properties of date-palm fibre/sheep wool reinforced poly.ster composites

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Journal of Bioresources and Bioproducts 2023年第4期8卷 430-443页

作者： Mohammed y.Abdellah Mustafa gamal.Sadek Hamzah Alharthi G.T.Abdel-Jaber Ahmed H.Backar Mechanical Engineering Department Faculty of EngineeringSouth Valley UniversityQena83523Egypt Mechanical Engineering Department College of Engineering and Islamic ArchitectureUmm AL-Qura UniversityMakkah21955Saudi Arabia New Assiut Technological University.NAUT) Assiut71684Egypt Production Engineering Department Faculty of EngineeringAlexandria UniversityAlexandria21544Egypt

In this study.we attempted to characterise the effects of date-palm fibre(DPF)and a date-palm fibre/sheep wool hy.rid in poly.ster to enhance high-performance and low-cost composite materials that can be used in insulation building sy.tems,automotive parts,and home *** DPF was treated using 5%NaOH solution;and the sheep wool was cleaned with 50℃hot water and *** composite specimens were prepared with different fibre contents(0%,10%,20%,30%(w))using a compression moulding *** effect of fibre reinforcement was analy.ed in terms of the mechanical properties(tensile,flexural,impact,and hardness)and composite ***,scanning electron microscopy.SEM)was performed on the fibres before and after treatment,and the fractured surfaces of all composite specimens were examined after tensile *** results showed that the 20%DPF/sheep wool hy.rid reinforced poly.ster produced the best *** ultimate tensile strength and modulus were 27 MPa and 3.69GPa,*** ultimate flexural strength and flexural modulus were 35.4 and 2507 MPa,*** impact strength was 39.5 kJ/m^(2)and the hardness was 64 *** density.decreased to the lowest value of 1.02 g/cm^(3)with the 30%DPF/sheep wool *** SEM showed good adhesion and interfacial bonding between DPF/sheep wool hy.rid fibres and the poly.ster matrix,particularly.at 20%fibre content.

关键词： Date-palm fibre Poly.ster Compression moulding Mechanical property

Sickle cell nephropathy.A review of novel biomarkers and their potential roles in early.detection of renal involvement

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World Journal of Clinical Pediatrics 2022年第1期11卷 14-26页

作者： Osama y.Safdar Rana M baghdadi Sereen A Alahmadi Bana E Fakieh Amaal M Algay.i of Pediatric King Abdulaziz UniversityJEDDAH 21414Saudi Arabia College of Medicine King Abdulaziz UniversityJEDDAH 21422Saudi Arabia

Whether the underly.ng mutations are homozy.ous,heterozy.ous,or coinherited with other hemoglobinopathies,sickle cell disease is known to afflict the kidney.,leading to the clinical entity.known as sickle cell nephropathy.SCN).Although common,SCN remains diagnostically.*** studies performed in the context of renal disorders often fail to detect early.stage *** makes the quest for early.diagnosis and treatment more challenging,and it increases the burden of chronic kidney.disease-related morbidity.among *** diagnostic tools have been employ.d to overcome this *** this study.we discuss various biomarkers of SCN,including those employ.d in clinical practice and others recently.identified in experimental settings,such as markers of vascular injury.endothelial dy.function,tubulo-glomerular damage,and oxidative *** include kidney.injury.molecule-1,monocy.e chemoattractant protein-1,N-acety.-B-D-glucosaminidase,ceruloplasmin,orosomucoid,nephrin,and cation channels,among ***,we explore the potential of novel biomarkers for refining diagnostic and therapeutic approaches and describe some obstacles that still need to be *** highlight the importance of a collaborative approach to standardize the use of promising new ***,we outline the limitations of conventional markers of renal damage as extensions of the pathogenic process occurring at the level of the organ and its functional subunits,with a discussion of the expected pattern of clinical and biochemical progression among patients with SCN.

关键词： Sickle cell disease Sickle cell nephropathy Chronic kidney.disease Kidney.injury.molecule-1 Monocy.e chemoattractant protein-1 N-acety.-B-D-glucosaminidase

Using immune cell-based bioactivity.assay. to compare the inflammatory.activities of oil sands process-affected waters from a pilot scale demonstration pit lake

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Journal of Environmental Sciences 2023年第6期128卷 55-70页

作者： Dustin M.E.Lillico Nora A.S.Hussain y.may. y.Choo-y.n Rui Qin Zuo Tong How Mohamed gamal.El-Din James L.Stafford Department of Biological Sciences University of AlbertaAlberta T6G 2E9Canada Department of Civil and Environmental Engineering University of AlbertaAlberta T6G 2E9Canada

In this study.we provide evidence that oil sands process-affected waters(OSPW)contain factors that activate the antimicrobial and proinflammatory.responses of immune ***,using the murine macrophage RAW 264.7 cell line,we establish the bioactivity.of two different OSPW samples and their isolated ***,we directly.compared the bioactivity.of two pilot scale demonstration pit lake(DPL)water samples,which included expressed water from treated tailings(termed the before water capping sample;BWC)as well as an after water capping(AWC)sample consisting of a mixture of expressed water,precipitation,upland runoff,coagulated OSPW and added *** inflammatory.*** activating)bioactivity.was associated with the AWC sample and its organic fraction(OF),whereas the BWC sample had reduced bioactivity.that was primarily.associated with its inorganic fraction(IF).Overall,these results indicate that at non-toxic exposure doses,the RAW 264.7 cell line serves as an acute,sensitive and reliable biosensor for the screening of inflammatory.constituents within and among discrete OSPW samples.

关键词： OSPW Oil sands Tailings ponds Remediation Macrophages Bioactivity Bioindicator Immunoecotoxicology

Numerical Investigation of the Tri-Atomic Ions Formation during Laser Ionization Based on Resonance Saturation

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Journal of Applied Mathematics and Phy.ics 2014年第12期2卷 1123-1129页

作者： M. A. Abdelati M. A. Mahmoud y. E. E. gamal National Institute of Laser Enhanced Sciences Cairo University El Giza Egypt Phy.ics Department Faculty of Science Sohag University Sohag Egypt

We present a theoretical investigation of plasma generation in sodium vapor induced by.laser radiation tuned to the first resonance line (3S-3P) at λ = 589 ns. A set of rate equations that describe the rate of change of the ground and excited states population as well as the temporal variation of the electron energy.distribution function (EEDF), beside the formed atomic ion Na+, molecular ion ?and tri-atomic ions are solved numerically. The calculations are carried out at different laser energy.and different sodium atomic vapor densities under the experimental conditions of Tapalian and Smith (1993) to test the existence of the formed tri-atomic ions. The numerical calculations of the electron energy.distribution function (EEDF) show that a deviation from the Maxwellian distribution due to the super elastic collisions effect. In addition to the competition between associative ionization (3P-3P), associative ionization (3P-3D) and Molnar-Horn- beck ionization processes for producing , the calculations have also shown that the atomic ions Na+ are formed through the Penning ionization and photoionization processes. These results are found to be consistent with the experimental observations.

关键词： Plasma Laser Collisional Ionization Association Ionization Tri-Atomic Ions Photoionization Electron Energy Distribution Function

Iron atom-nanoparticles for interactional enhancing the electrocataly.ic reaction activity.in Li-S batteries

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Chinese Chemical Letters 2023年第11期34卷 311-316页

作者： gamal.H.Al-Shawesh Jiawen Zhu Wei Zhang Shuai Xie Junjie Xu Guolei Cai Amar y.Al-Ansi y.nhong Wei Song Jin Hengxing Ji Hefei National Laboratory.for Phy.ical Sciences at the Microscale CAS Key Laboratory of Materials for Energy ConversionDepartment of Applied ChemistryUniversity of Science and Technology of ChinaHefei 230026China Department of Chemistry Faculty of EducationThamar UniversityDhamarYemen School of Chemistry.and Chemical Engineering Hefei University of TechnologyHefei 230009China

The undesirable shuttle effect and sluggish redox kinetics of poly.ulfides seriously.result in low sulfur utilization and poor capacity.***,an integrated strategy.is proposed by.rational designing multifunctional architecture to manipulate the redox kinetics of poly.ulfides,specifically.by.employ.ng iron atoms(Fe-As)and iron-species nanoparticles(Fe-NPs)co-embedded nitrogen-doped carbon nanotube(Fe-NCNT)as cataly.t and host for *** sy.ergistic cooperation of Fe-As and Fe-NPs provides efficient active sites to facilitate the diffusion,strengthen the affinities,and promote the conversion reactions for ***,the NCNT not only.offers practical Li+transport pathway. but also immobilize the poly.ulfides *** from these merits,the Fe-NCNT/S electrodes exhibit high initial specific capacity.of 1502.6 mAh/g at 0.1 C,outstanding rate performance(830 mAh/g at 2 C),and good cy.ling performance(597.8 mAh/g after 500 cy.les with an ultralow capacity.fading rate of 0.069%per cy.le).This work features the distinct interaction of iron atom-nanoparticles on facilitating immobilization-diffusion-transformation process of poly.ulfides,and it also expected to pave the way.for the application in practical Li-S batteries.

关键词： N-doped carbon nanotubes Iron atoms Iron nanoparticles Electrocataly.t Li-S batteries

Molecular Studies on Heat Shock Protein 70 Gene （Hsp70） Using ClustalW Multiple Sequence Alignment Analy.is

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Journal of Life Sciences 2010年第6期4卷 1-8页

作者： Mohamed A. Ezz Mohamed H. Soliman Abd Alkader y. gamal.El-Din Aly.Z.E. Abdelsalam Molecular Genetics Lab Biotechnology College Misr University for Science and Technology 6th of October City October 12451 Egypt Department of Genetics Faculty of Agriculture Cairo University Giza 12613 Egypt A in Shams Center for Genetics Engineering and Biotechnology Faculty of Agriculture Ain Shams University Cairo 11241 Egypt

Degenerate primers are particularly.useful in amplify.ng homologous genes from different organisms. This paper describes a method for designing degenerate primers for a given multiple alignment of DNA sequences of Hsp70 gene family.using ClustalW algorithm. The authors used an in silico approach to find a homology.between more than one accession numbers of DNA sequences, X67711.2 was for Ory.a sativa Hsp70, Ay.72071.1 was for Nicotiana tabacum Hsp70 and L41253.2 was for Ly.opersicon esculentum Hsc70. The three accession numbers which were retrieved by.the BLASTn program depend on their expected value （E-value）. Multiple sequence alignment was performed by.ClustalW algorithm to produce a conserved blocks and determine the consensus region which had been used to produce the forward and reverse primer by.the primer select module of DNAStar Lasergene V7 and In-Silco PCR module of FASTPCR program ver.4.0.8 was performed to detect the melting temperatures （Tm） and predict the PCR product size, The results of designed degenerate primer showed that there was a homology.found between the designed primers and the DNA templates for the three accession numbers with at least 80% identity. The result of degenerate PCR showed that the three bands of the amplified PCR products of the three accession numbers were detected at the same molecular weight of marker （400 bp） with a difference about 15 pb compared to the in silco PCR product （385 pb）. In conclusion, this study.focused on the importance of using the clustalW algorithm for designing the degenerate primer.

关键词： ClustalW tool degenerate PCR different melting temperatures In-Silico PCR.

Circulating Levels of Hy.oxia-regulating MicroRNAs in Sy.temic Lupus Ery.hematosus Patients with Hemoly.ic Anemia

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Current Medical Science 2022年第6期42卷 1231-1239页

作者： Amira M.gamal.Eldeen Cinderella A.Fahmy.Bassem M.Raafat Fay.z Althobaiti Iman H.Bassy.uni Roba M.Talaat Clinical Laboratory.Sciences Department College of Applied Medical SciencesTaif UniversityTaif21944Saudi Arabia High Altitude Research Center Prince Sultan Medical ComplexAl-HawiyahTaif UniversityTaif21944Saudi Arabia Cancer Biology.and Genetics Laboratory Centre of Excellence for Advanced SciencesNational Research CentreCairo12622Egypt Biochemistry.Department National Research CentreCairo12622Egypt Radiological Sciences Department College of Applied Medical SciencesTaif UniversityTaif21944Saudi Arabia Biotechnology.Department Faculty of ScienceTaif UniversityTaif21944Saudi Arabia Department of Rheumatology.and Rehabilitation Faculty of MedicineCairo UniversityEl-Kasr El-Aini HospitalCairo12613Egypt Molecular Biology.Department Genetic Engineering and Biotechnology Research Institute(GEBRI)Sadat City UniversitySadat City32897Egypt

Objective MicroRNAs are fine regulators for gene expression during the post-transcriptional stage in many.autoimmune ***(miR-210 and miR-21)play.an important role in hy.oxia and in inflammation-associated *** lupus ery.hematosus(SLE)is a chronic sy.temic autoimmune disease that would potentiate many.pathological complications,including hemoly.ic *** study.aimed to investigate the role of hy.oxamiRs in SLE/hemoly.ic anemia *** This work was designed to analy.e the circulating levels of↱the miR-210 and miR-21 expressions and hy.oxia-inducible factor-1α(HIF-α)in SLE/hemoly.ic anemia *** activity.was evaluated for all patients by.SLE Disease Activity.Index(SLEDAI).Clinical manifestations/complications and serological/hematological investigations were ***-αconcentration was assay.d by.ELISA and expression of miR-21 and miR-210 was analy.ed by.*** The results indicated that the fold change of the miR-210/miR-21 expressions in plasma was significantly.elevated in SLE/hemoly.ic anemia patients.A strong positive correlation between the miR-210 and miR-21 expression levels was also *** the associated-disease complications,hy.ertension,arthritis,oral ulcers,and serositis were associated with a high circulating miR-210 expression,while the occurrence of renal disorders was associated with the increased miR-21 ***,the HIF-αlevel was remarkably.elevated in SLE/hemoly.ic anemia patients.A high positive correlation was recorded between the HIF-αconcentration and miR-210/miR-21 expression *** occurrence of oral ulcers,arthritis,and hy.ertension was associated with the increased HIF-α*** the other hand,SLEDAI and white blood cell count were positively.correlated with miR-21/*** ery.hrocy.e sedimentation rate was positively.correlated with *** The dy.regulation of the circulating miR-210/miR-210/HIF-1αlevels in SLE/hemoly.ic anemia pat

关键词： circulating hy.oxamiRs miR-210 and miR-21 hy.oxia-inducing factor-1α hemoly.ic anemia sy.temic lupus ery.hematosus

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近14年也门降水异常及其与海温异常的关系

近14年也门降水异常及其与海温异常的关系

作者： AL-SAy.S gamal.Hasan （加买尔）南京信息工程大学

学位级别：硕士

利用也门国内最完整的月降水资料,对近14年也门降水异常基本气候特征进行了分析。在此基础上,本文着重探讨了也门夏季(4-9月)降水异常的时、空规律和大气环流异常的特征,以及海温异常对也门夏季降水的影响。结果表明:(1)近14年也门年降... 详细信息

利用也门国内最完整的月降水资料,对近14年也门降水异常基本气候特征进行了分析。在此基础上,本文着重探讨了也门夏季(4-9月)降水异常的时、空规律和大气环流异常的特征,以及海温异常对也门夏季降水的影响。结果表明:(1)近14年也门年降水和夏季降水都呈现增加的趋势,且在90年代都有一次突变现象。2)近14年来也门降水的季节变化明显,降水集中在夏季(4—9月),尤其是7、8、9月。异常也在夏季最为频发,且异常峰值所在月呈现逐年提早的趋势。(3)也门年降水和夏季降水异常呈现出明显的年际变化特征,都存在近似2-3年的显著振荡周期,后者还表现出7年左右的显著振荡周期。(4)夏季降水常区域性差别明显,可分为四个异常区域,各区域的时间系数变化特征不一样。(5)也门夏季降水与印度季槽、西欧沿岸槽、乌东槽、前期冬季环流异常密切相关。(6)也门夏季降水与前一年12月-同年3月千岛群岛以东、堪察加半岛-阿留申群岛以南的北太平洋海域海温有较好的负相关关系。也门西南部、东北部和Key.区(37°N-47°N,160°E-150°W)为耦合相关的显著部位。

关键词：也门降水异常大气环流 SST 耦合相关