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First principle calculations of thermodynamic properties of pure graphene sheet and graphene sheets with si,Ge,Fe,and Co impurities

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Chinese Physics B 2016年第9期25卷 289-295页

作者： A Kheyri Z nourbakhsh Plasma Physics Research Center Science and Research BranchIslamic Azad University Physics Department Faculty of ScienceUniversity of Isfahan

The thermal properties of pure graphene and graphene-impurity （impurity = Fe, Co, si, and Ge） sheets have been investigated at various pressures （0-7 GPa） and temperatures （0-900 K）. some basic thermodynamic quantities such as bulk modulus, coefficient of volume thermal expansion, heat capacities at constant pressure and constant volume of these sheets as a function of temperature and pressure are discussed. Furthermore, the effect of the impurity density and tensile strain on the thermodynamic properties of these sheets are investigated. All of these calculations are performed based on the density functional theory and full quasi harmonic approximation.

关键词： density functional theory graphene impurity thermal properties

Free vibration and transient response of double curved beams connected by intermediate straight beams

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 37-62页

作者： R.A.JAFARI-TALOOKOLAEI h.GhANDVAR E.JUMAEV s.KhATIR T.CUONG-LE school of Mechanical Engineering Babol Noshirvani University of Technology Department of Mechanical Engineering Faculty of Engineering New Uzbekistan University University of Business and science Center for Engineering Application and Technology solutions Ho Chi Minh City Open University

This paper investigates the free vibration and transient response of interconnected structures including double curved beams and intermediate straight beams,which are all constructed from functionally graded porous(FGP) materials. The strain potential and kinetic energies of each beam along with the work done by the external force are calculated. Additionally, a higher-order beam element is introduced to derive stiffness and mass matrices, along with the force vector. The curved and straight beams are discretized, and their assembled stiffness, mass matrices, and force vectors, are *** conditions at the joints are used to derive the total matrices of the entire structure. subsequently, the natural frequencies and transient response of the system are determined. The accuracy of the mathematical model and the self-developed computer program is validated through the comparison of the obtained results with those of the existing literature and commercial software ANsYs, demonstrating excellent ***, a comprehensive study is conducted to investigate the effects of various parameters on the free vibration and transient response of the considered structure.

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Electronic properties and topological phases of ThXY(X= Pb, Au, Pt and Y= sb, Bi, sn) compounds

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Chinese Physics B 2016年第3期25卷 319-324页

作者： Zahra nourbakhsh Aminollah Vaez Physics Department Faculty of Science University of Isfahan

The electronic properties and topological phases of ThXY （X = Pb, Au, Pt, Pd and Y = sb, Bi, sn） compounds in the presence of spin-orbit coupling, using density functional theory are investigated. The ThPtsn compound is stable in the ferromagnetic phase and the other ThXY compounds are stable in nonmagnetic phases. Band structures of these compounds in topological phases （insulator or metal） and normal phases within generalized gradient approximation （GGA） and Engel- Vosko generalized gradient approximation （GGA_EV） are compared. The ThPtsn, ThPtBi, ThPtsb, ThPdBi, and ThAuBi compounds have topological phases and the other ThXY compounds have normal phases. Band inversion strengths and topological phases of these compounds at different pressure are studied. It is seen that the band inversion strengths of these compounds are sensitive to pressure and for each compound a second-order polynomial fitted on the band inversion strengths-pressure curves.

关键词： topological phase density functional theory energy band gap band inversion strength

Neuroinflammation as a therapeutic target in huntington's disease

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Neural Regeneration Research 2025年第3期20卷 817-818页

作者： Andrea Kwakowsky Thulani h.Palpagama Center for Brain Research and Department of Anatomy and Medical Imaging Faculty of Medical and Health SciencesUniversity of AucklandAucklandNew Zealand Pharmacology and Therapeutics School of MedicineGalway Neuroscience CentreUniversity of GalwayGalwayIreland

In 1872, George huntington presented his essay “On Chorea” to the Meigs and Mason Academy of Medicine and, in doing so, detailed a disease that would later bear his name. huntington's disease(hD) is a genetic, neurodegenerative disease that manifests as the loss of motor control,cognitive impairment,and mood and psychiatric changes in paents.

关键词： huntington inflammation Medicine

Glial response in the midcingulate cortex in huntington’s disease

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Neural Regeneration Research 2025年第1期20卷 207-208页

作者： Thulani h.Palpagama Andrea Kwakowsky Center for Brain Research and Department of Anatomy and Medical Imaging Faculty of Medical and Health SciencesUniversity of AucklandAucklandNew Zealand Pharmacology and Therapeutics School of MedicineGalway Neuroscience CenterUniversity of GalwayGalwayIreland

huntington’s disease(hD)is a genetic disease characterized by the progressive degeneration of the striatum and *** can present with a variety of symptoms that can broadly be classified into motor symptoms,inclusive of choreatic movements and rigidity,mood and psychiatric symptoms,such as depression and apathy,and cognitive symptoms,such as cognitive *** causal mutation underlying hD results from an expansion of a CAG repeat sequence on the IT15 gene,resulting in the formation and accumulation of a mutant huntingtin protein.

关键词： huntington degeneration cortex

sYNThEsIs AND ChARACTERIZATION OF ORGANO-sOLUBLE POLY(AMIDE-IMIDE)s BAsED ON 1,2-BIs[4-(TRIMELLITIMIDO)PhENOXY]EThANE AND AROMATIC DIAMINEs

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Chinese Journal of Polymer science 2010年第6期28卷 941-949页

作者： Khalil Faghihi Mehdi nourbakhsh Mohsen hajibeygi Organic Polymer Chemistry Research Laboratory Department of ChemistryFaculty of Science Arak University

New organo-soluble poly（amide-imide）s（PAIs） 8a-8f were prepared from newly synthesized 1,2-bis[4,4＇-（trimellitimido） phenoxy]ethane 6 via direct polycondensation with various aromatic *** diacid 6 was synthesized by the condensation reaction of 12-bis[4-atninophenoxy]ethane 4 with trimellitic anhydride 5 in acetic *** polymers were obtained in quantitative high yields with inherent viscosities of 0.48-0.61 dL/*** of these polymers were highly soluble in organic solvents such as,N-methyl-2-pyrrolidone（NMP）,dimethylformamide（DMF）,N,N＇-dimethylacetamide （DMAc） and dimethylsulfoxide（DMsO） at room temperature and were fully characterized by means of NMR spectroscopy, FTIR spectroscopy,elemental analyses,inherent viscosity,solubility test,specific rotation,differential scanning calorimetry （DsC） and thermogravimetric analysis（TGA）.

关键词： Poly(amide-imide) Polycondensation Organo-soluble

Implication of surface Fractal Analysis to Evaluate the Relative sensitivity of Topography to Active Tectonics,Zagros Mountains, Iran

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Journal of Mountain science 2015年第1期12卷 177-185页

作者： Ali Faghih Ahmad nourbakhsh Department of Earth sciences College of Sciences Shiraz University

Fractal geometry is increasingly becoming a useful tool for modeling and quantifying the complex patterns of natural phenomena. The Earth's topography is one of these phenomena that have fractal characteristics. This paper investigates the relative sensitivity of topography to active tectonics using AsTER Global Digital Elevation Model. The covering divider method was used for direct extraction of surface fractal dimension(D surf) to estimate the roughness-surface of topography with aid of geographic information system(GIs)techniques. This evaluation let us highlight the role of the geomorphic and tectonic processes on the spatial variability of fractal properties of natural *** zones can be delineated using fractal dimension mapping in which variability of surface fractal dimension reflects the roughness of the landform surface and is a measure of topography texture. Obtained results showed this method can be a quick and easy way to assess the distribution of land surface deformation in different tectonic settings. The loose alluvial deposits and irregularities derived by tectonic activity have high fractal dimensions whereas the competent formations and higher wavelength folded surfaces have lower fractal *** to the obtained results, the Kazerun Fault Zone has a crucial role in the separation of the Zagros Mountain Ranges into the different lithological,geomorphological and structural zones.

关键词： surface fractal analysis Topography Active tectonics Kazerun Fault Zone Zagros Iran

Impact of modified electrodes on boosting power density of microbial fuel cell for effective domestic wastewater treatment:A case study of Tehran

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燃料化学学报 2017年第7期45卷 871-879页

作者： Fatemeh nourbakhsh Mohammad Pazouki Mohsen Mohsennia Department of Chemistry University of Kashan Department of Energy Institute of Materials and Energy (MERC) Nanoscience and Nanotechnology Institution University of Kashan

Utilizing microbial fuel cells( MFCs) is a promising technology for energy-efficient domestic wastewater treatment,but it still faces practical barriers such as low power generation. In this study,the LaMnO_3 perovskite-type oxide nanoparticles and nickel oxide/carbon nanotube/polyaniline( NCP) nanocomposite( the cathode and anode catalysts,respectively) have been prepared and used to enhance power density of MFC. The prepared La-based perovskite oxide catalysts were characterized by X-ray diffraction( XRD) and scanning electron microscopies( sEM). The electrocatalytic properties of the prepared catalysts were investigated through cyclic voltammetry( CV) and electrochemical impedance spectroscopy( EIs) and Tafel plot at ambient temperature. Results show the exchange current densities of LaMnO_3/carbon cloth cathode and NCP nanocomposite/carbon cloth anode were 1.68 and 7 times more compared to carbon cloth cathode,respectively. In comparison to the bare carbon cloth anode,the MFC with the modified electrodes shows 11 times more enhancement in power density output which according to electrochemical results,it can be due to the enhancement of the electron transfer capability. These cathodic and anodic catalysts were examined in batch and semicontinuous modes to provide conditions close to industrial conditions. This study suggests that utilizing these low cost catalysts has promising potential for wastewater treatment in MFC with high power generation and good COD removal efficiency.

关键词： carbon nanotube nickle oxide La-based perovskite oxide semi-continuous mode

Revisiting cerebral endothelial cells in Alzheimer’s disease

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Neural Regeneration Research 2025年第10期20卷 2911-2912页

作者： Amira s.hanafy Department of Neurosurgery University Hospital BonnBonnGermany

Alzheimer’s disease(AD)is the most common neurodegenerative disorder characterized by slow and progressive decline of cognitive and memory *** only approximately 5%of the cases,AD is familial,as often predisposed by genetic mutations(hoogmartens et al.,2021),while sporadic AD accounts for approximately 95%of the *** amyloid cascade hypothesis is one of the fundamental hypotheses put out to explain AD pathogenesis as dysregulated homeostasis of amyloid-β(Aβ)peptides that leads to the accumulation of Aβplaques in the parenchyma,an anatomical hallmark of AD.

关键词： Alzheimer Aβ cerebral