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Hepatoprotective activity of Dypsis lutescens against D-galactosamine-induced hepatotoxicity in rats and its phytoconstituents

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Asian Pacific Journal of Tropical Biomedicine 2019年第11期9卷 467-473页

作者： Mai M.el-Ghonemy Walaa a.el-Kashak Tahia K.Mohamed Enayat A.Omara Jihan Hussein Abdel-Razik H.Farrag Mahmoud I.Nassar Mohamed Y.el-Kady Chemistry of Natural Compounds Department National Research Centre33 El-Bohouth St.Dokki12622CairoEgypt Department of Pathology National Research Centre33 El Bohouth St.Dokki12622CairoEgypt Medical Biochemistry Department National Research Centre33 El Bohouth St.Dokki12622CairoEgypt Chemistry Department Faculty of ScienceAin Shams UniversityCairoEgypt

Objective:To isolate and identify the polyphenolic constituents of Dypsis lutescens,and evaluate the hepatoprotective activity of the ethanolic extract of Dypsis lutescens ***:Hepatoprotective,antioxidant and anti-inflammatory effects of two doses of Dypsis lutescens ethanolic leaf extract were investigated in five groups of six rats each administered with the ethanolic extract of Dypsis lutescens *** function parameters were assessed,histopathological study was carried out,the anti-inflammatory mediators and the antioxidant potential in the liver tissues were *** addition,the total ethanolic extract of Dypsis lutescens leaves was subjected to different chromatographic separation techniques to yield ten phenolic *** isolated compounds structures were spectroscopically ***:Hepatoprotective activity of Dypsis lutescens ethanolic extract was estimated for the first time and showed significant activity against histopathological changes induced by D-galactosamine in *** extract improved the liver *** to the D-galactosamine group,the architecture of the liver in the treated groups was improved in the histopathological *** results proved the hepatoprotective activity of Dypsis lutescens and its ability in attenuating liver oxidative damage and *** investigations of the total extract afforded ten compounds from the genus ***:The alcoholic extract of Dypsis lutescens exerted potential hepatoprotective action,maintaining liver health and functions.

关键词： Dypsis lutescens Flavonoid glycosides Phenolic acids Hepatoprotective Antioxidant Anti-inflammatory

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Study on the SEIQR model and applying the epidemiological rates of COVID-19 epidemic spread in Saudi Arabia

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Infectious Disease Modelling 2021年第1期6卷 678-692页

作者： Hamdy Youssef Najat Alghamdi Magdy A.Ezzat Alaa a.el-Bary Ahmed M.Shawky Mechanical Engineering Department College of Engineering and Islamic ArchitectureUmm Al-Qura UniversityMakkahSaudi Arabia Department of Mathematics Faculty of Applied ScienceUmm Al-Qura UniversityMakkahSaudi Arabia College of Science and Arts Qassim UniversityAl BukairiyahAl QassimSaudi Arabia Arab Academy for Science Technology and Maritime TransportP.O.Box 1029AlexandriaEgypt Science and Technology Unit(STU) Umm Al-Qura UniversityMakkahSaudi Arabia National Committee for Mathematics Academy of Scientific Research and TechnologyEgypt

This article attempts to establish a mathematical epidemic model for the outbreak of the new COVID-19 coronavirus.A new consideration for evaluating and controlling the COVID-19 outbreak will be constructed based on the SEIQR Pandemic *** this paper,the real data of COVID-19 spread in Saudi Arabia has been used for the mathematical model and dynamic *** the new reproductive number and detailed stability analysis,the dynamics of the proposed SEIQR model have been *** local sensitivity of the reproduction number has been *** domain of solution and equilibrium based on the SEIQR model have been proved using a Jacobian linearization *** state of equilibrium and its significance have been proved,and a study of the integrity of the disease-free equilibrium has been carried *** Lyapunov stability theorem demonstrated the global stability of the current model *** SEIQR model has been numerically validated and projected by contrasting the results from the SEIQR model with the actual COVID-19 spread data in Saudi *** result of this paper shows that the SEIQR model is a model that is effective in analyzing epidemic spread,such as *** the end of the study,we have implemented the protocol which helped the Saudi population to stop the spread of COVID-19 rapidly.

关键词： COVID-19 Jacobian matrix Lyapunov stability Reproduction number SEIR model SEIQR model

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electronic and magnetic structures of V-doped zinc blende Zn_(1-x)V_xN_yO_(1-y) and Zn_(1-x)V_xP_yO_(1-y)

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Chinese Physics B 2011年第8期20卷 419-424页

作者： N.Mamouni M.Belaiche A.Benyoussef a.el Kenz H.Ez-Zahraouy M.Loulidi E.H.Saidi E.K.Hlil Laboratoire de Magntisme et de Physique des Hautes Energies Dpartement de Physique Associ au CNRSTURACB.P.1014Facult des SciencesRabatMorocco Laboratoire de Magntisme Matriaux MagntiquesMicro-ondes et CramiqueENSRabatMorocco INANOTECH Institute of Nanomaterials and NanotechnologyMAScIRRabatMorocco Laboratoire de Physique des Hautes Energies Dpartement de Physique B.P.1014Facult des SciencesRabatMorocco Institut Nel MCMF-UJFC.N.R.SB.P.16638042 Grenoble CedexFrance

electronic and magnetic structures of zinc blende ZnO doped with V impurities are studied by first-principles calculations based on the Korringa-Kohn-Rostoker （KKR） method combined with the coherent potential approximation （CPA）. Calculations for the substitution of O by N or P are performed and the magnetic moment is found to be sensitive to the N or P content. Furthermore, the system exhibits a half-metallic band structure accompanied by the broadening of vanadium bands. The mechanism responsible for ferromagnetism is also discussed and the stability of the ferromagnetic state compared with that of the paramagnetic state is systematically investigated by calculating the total energy difference between them by using supercell method.

关键词： ab initio calculations density of states magnetic moment doping diluted magneticsemiconductors

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Structural and optical properties of nano-spin coated sol-gel porous TiO_2 films

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Transactions of Nonferrous Metals Society of China 2012年第12期22卷 3003-3011页

作者： M.M.el-NAHASS M.H.ALI a.el-DENGLAWEY Physics Department Faculty of Education Ain Shams University Roxy Cairo 11757 Egypt Physics Department Faculty of Science Ain Shams University Cairo Egypt Physics Department Faculty of Science South Valley University Qena 83523 Egypt Phys Dep Fac of Appl Med Sci Turabah 21995 Taif University KSA

Three thicknesses of TiO2 films, 174, 195, and 229 nm, were deposited onto quartz substrates by sol–gel spin coating method. The as-deposited thin films were characterized by nano-crystallite with different sizes (19–46 nm) and relatively high porous structure. Optical constants were determined and showed the lowest refractive index of 1.66 for the as-prepared films that ever reported till now. Obtained results were discussed through current theoretical ideas.

关键词： TiO2 films optical properties nanostructure electron microscopy thin films spin coating technique

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Complement-dependent neuroinflammation in spinal cord injury:from pathology to therapeutic implications

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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 Tfaily Firas Kobeissy Juanmarco Gutierrez Gonzalez Daniel Refai Gerald R.Rodts Christian Mustroph David Gimbel Jonathan Grossberg Daniel L.Barrow Matthew F.Gary Ali M.Alawieh Department of Neurosurgery Emory University School of MedicineAtlantaGAUSA Department of Neurology Yale UniversityNew HavenCTUSA Center for Neurotrauma Multiomics&Biomarkers(CNMB)Morehouse School of MedicineAtlantaGAUSA

Spinal cord injury remains a major cause of disability in young adults,and beyond acute decompression and rehabilitation,there are no pharmacological treatments to limit the progression of injury and optimize recovery in this *** the thorough investigation of the complement system in triggering and propagating cerebral neuroinflammation,a similar role for complement in spinal neuroinflammation is a focus of ongoing *** this work,we survey the current literature investigating the role of complement in spinal cord injury including the sources of complement proteins,triggers of complement activation,and role of effector functions in the *** study relevant data demonstrating the different triggers of complement activation after spinal cord injury including direct binding to cellular debris,and or activation via antibody binding to damage-associated molecular *** effector functions of complement have been implicated in spinal cord injury,and we critically evaluate recent studies on the dual role of complement anaphylatoxins in spinal cord injury while emphasizing the lack of pathophysiological understanding of the role of opsonins in spinal cord *** this pathophysiological review,we systematically review the different translational approaches used in preclinical models of spinal cord injury and discuss the challenges for future translation into human *** review emphasizes the need for future studies to dissect the roles of different complement pathways in the pathology of spinal cord injury,to evaluate the phases of involvement of opsonins and anaphylatoxins,and to study the role of complement in white matter degeneration and regeneration using translational strategies to supplement genetic models.

关键词： complement neuroinflammation neuroplasticity regeneration spinal cord injury targeted therapy

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Effect of terminal locations of pods on biomass production and ^(13)C partitioning in a fasciated stem soybean Shakujo

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2011年第1期12卷 72-82页

作者： Kyosuke YAMADA Aoi SASAKURA Kiyoshi NISHIWAKI Hany a.el-SHEMY Pravat K.MOHAPATRA Nguyen T.NGUYEN Hideki KUROSAKI Syunsuke KANAI Junki ITO Kounosuke FUJITA Department of Environmental Dynamics and Management Graduate School of Biosphere SciencesHiroshima University Nagano Chushin Agricultural Experimental Station Faculty of Agriculture Research Park (FARP) and Biochemistry Department Faculty of AgricultureCairo University School of Life Sciences Sambalpur University Hokkaido Prefectural Kitami Agricultural Experiment Station Hiroshima Prefectural Agriculture Research Center

This study addresses the hypothesis that stagnation of soybean yield on the farm can be improved by selection of a physiological trait favoring carbon assimilate partitioning to terminally placed pods versus genotypes having axillary pods at close plant spacing.13C was fed to source-sink units comprising a leaf,axillary/terminal pods,and petioles at upper and lower positions of the stem axis in two soybean cultivars,na.ely Shakujo and Enrei,at different densities of *** cultivars differ significantly in architecture,Shakujo bearing a few hundreds of pods in close succession to one another in a terminally placed raceme,in contrast to Enrei having axillary *** yield per plant was higher in Enrei than in Shakujo at low density,but Shakujo out-yielded Enrei at close *** density decreased yield per plant and altered the pattern of assimilate partitioning significantly within the plants for both *** high density more assimilates moved to the upper parts at the cost of the lower *** terminally placed pods of Shakujo were advantaged to receive assimilates under density *** benefit was accrued to pod filling of Enrei,however,under this condition.

关键词： Fasciated stem Grain yield Photosynthesis Photosynthate partitioning Population density Soybean Source-sink unit

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Survival of transplanted nests of the red wood ant Formica aquilonia （Hymenoptera： Formicidae）： The effects of intraspecific competition and forest clear-cutting

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Insect Science 2014年第4期21卷 486-492页

作者： jouni Sorvari Esa Huhta Harri Hakkarainen 1 Section of Ecology Department of Biology FI-20014 University of Turku Finland Department of Environmental Science University of Eastern Finland P.O. Box 1627 FI-70211 Kuopio Finland Finnish Forest Research Institute Rovaniemi Research Unit P.O. Box 16 FI-96301 Rovaniemi Finland

The fitness and survival of ant colonies depend on the resources near their nests. These resources may be limited due to poor habitat quality or by intra- and interspecific competitions, which in extreme cases may cause the ant colony to perish. We tested the effect of intraspecific competition and habitat degradation （forest clear-cutting） on colony survival by transplanting 26 nests of the red wood ant （Formica aquilonia Yarrow, 1955） in 26 different forest areas that contained 0-11 conspecific alien nests per hectare. F. aquilonia is highly dependent on canopy-dwelling aphids, thus the removal of trees should cause food limitation. During the course of the 4-year experiment, 9 of the forests were partially clear- cut. We found that while forest clear-cutting significantly decreased the colonies＇ survival, intraspecific competition did not. As a highly polygynous and polydomous species, E aquilonia seems to tolerate the presence of alien conspecific colonies to a certain extent.

关键词： colony survival habitat degradation polydomy red wood ants relocationexperiment

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Advanced Functional electromagnetic Shielding Materials:A Review Based on Micro‑Nano Structure Interface Control of Biomass Cell Walls

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Nano-Micro Letters 2025年第1期17卷 98-134页

作者： Yang Shi Mingjun Wu Shengbo Ge Jianzhang Li Anoud Saud Alshammari Jing Luo Mohammed A.Amin Hua Qiu Jinxuan Jiang Yazeed M.Asiri Runzhou Huang Hua Hou Zeinhom M.el‑Bahy Zhanhu Guo Chong Jia Kaimeng Xu Xiangmeng Chen Co‑Innovation Center of Efficient Processing and Utilization of Forest Resources College of Materials Science and EngineeringNanjing Forestry UniversityNanjing 210037People’s Republic of China State Key Laboratory of Efficient Production of Forest Resourced Beijing Forestry UniversityQinghua East Road 35Haidian DistrictBeijing 100083People’s Republic of China Department of Physics Faculty of Sciences‑ArarNorthern Border UniversityArar 91431Saudi Arabia Department of Chemistry College of ScienceTaif UniversityP.O.Box 1109921944 TaifSaudi Arabia Shaanxi Key Laboratory of Macromolecular Science and Technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’anShaanxi 710072People’s Republic of China Integrated Composites Lab Department of Mechanical and Construction EngineeringNorthumbria UniversityNewcastle Upon Tyne NE18STUK College of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024People’s Republic of China Department of Chemistry Faculty of ScienceAl-Azhar UniversityNasr CityCairo 11884Egypt Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products International Joint Research Center for Biomass MaterialsSouthwest Forestry UniversityKunming 650224People’s Republic of China School of Science Henan Agricultural UniversityZhengzhou 450002People’s Republic of China

Research efforts on electromagnetic interference(EMI)shielding materials have begun to converge on green and sustainable biomass *** materials offer numerous advantages such as being lightweight,porous,and *** to their porous nature,interfacial compatibility,and electrical conductivity,biomass materials hold significant potential as EMI shielding *** concerted efforts on the EMI shielding of biomass materials have been reported,this research area is still relatively new compared to traditional EMI shielding *** particular,a more comprehensive study and summary of the factors influencing biomass EMI shielding materials including the pore structure adjustment,preparation process,and micro-control would be *** preparation methods and characteristics of wood,bamboo,cellulose and lignin in EMI shielding field are critically discussed in this paper,and similar biomass EMI materials are summarized and *** composite methods and fillers of various biomass materials were *** paper also highlights the mechanism of EMI shielding as well as existing prospects and challenges for development trends in this field.

关键词： Biomass materials electromagnetic interference shielding Micro-nano structure interface control Conductivity

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A crossover from Efros–Shklovskii hopping to activated transport in a GaAs two-dimensional hole system at low temperatures

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Journal of Semiconductors 2021年第5期42卷 60-63页

作者： S.Dlimi a.el kaaouachi L.Limouny B.A.Hammou Physics Department Faculty of SciencesIbn Zohr UniversityBP 8106Hay Dakhla80000 AgadirMorocco Materials and Physicochemistry of the Atmosphere and Climate Group Faculty of SciencesIbn Zohr UniversityBP 810680000 AgadirMorocco

In this paper, we discuss low-temperature hopping-conductivity behavior in the insulating phase, in the absence of a magnetic field. We conduct a theoretical study of the crossover from hopping to activated transport in a GaAs two-dimensional hole system at low temperatures, finding that a crossover takes place from the Efros-Shklovskii variable-range hopping(VRH)regime to an activated regime in this system. This conductivity behavior in p-GaAs quantum wells is qualitatively consistent with the laws laid down in theories of localized electron interactions. Given sufficiently strong interactions, the holes in the localized states are able to hop collectively.

关键词： quantum wells 2D GaAs heterostructues transport properties variable range hopping

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Thin layers of Fe doped ZnO deposited by spin-coating for electrolysis and photodetector applications

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Transactions of Nonferrous Metals Society of China 2024年

作者： Dikra BOURAS Mamoun FelLAH Regis BARILLE Amjad IQBAL Hamadi FOUZIA Obrosov ALEKSEI Gamal a.el-HITI Faculty of Science and Technology， University of Souk-Ahras Mechanical Engineering Department， ABBES Laghrour University Biomaterial， Synthesis and Tribology Research team， ABBES Laghrour-University MOLTECH-Anjou， Université d'Angers/UMR CNRS 6200 Department of Materials Technologies， Faculty of Materials Engineering， Silesian University of Technology Matter science department， ABBES Laghrour University Brandenburg University of Technology Cottbus-Senftenberg Department of Optometry， College of Applied Medical Sciences， King Saud University

ZnO is nowadays not only used as an additive for the copper and cement industry， but also in medicine and cosmetic industry as part of the substitute materials of choice for the field of new technologies such as renewable energy. This study aims to investigate the effect of iron concentration on the microstructural and structural properties of ZnO for electrolysis and Photodetector Applications. The Thin layers of un-doped and doped ZnO with different percentages of Fe （2， 4， and 6 wt.%） were deposited by spin-coating on glass substrates. Sample characterization was done by X-ray diffraction （XRD）， Atomic force microscopy （AFM）， Scanning electron microscopy （SEM）， energy-dispersive X-ray spectroscopy （EDS）， UV-visible absorption spectra and X-ray photoelectron spectroscopy （XPS）. Structural measurements by XRD show that all the layers are polycrystalline with a hexagonal Wurtzite structure. Two new peaks were also discovered after the doping process （400） and （440） belonging to the Fe2O4crystal phase spectrum. Morphological analysis showed that the surface roughness values of ZnO layers ranged between 8 and 45 nm. XPS studies confirmed the presence of Fe in +3 states in ZnO layers. An average transmittance of 90% was measured by UV- in the wa.elength range of 200-900 nm. The values of the energy gap （Eg） decreased with an increase in the concentration of Fe. AFM topography results confirmed that ZnO-based thin layers have a relatively uniform surface. The efficiency of these samples has been confirmed for their use in many electrical applications， including photodetectors and electrolysis of contaminated solutions.

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