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Hypoxia in Alzheimer's disease:effects of hypoxia inducible factors

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Neural Regeneration Research 2021年第2期16卷 310-311页

作者： Halimatu hassan Ruoli Chen School of Pharmacy and Bioengineering Keele UniversityStaffordshireUK

Alzheimer's disease(AD),a commonneurodegenerative disease,afflicts 26 million people worldwide currently with projection of a fourfold increase in this figure by the year 2050(Brookmeyer et al.,2018).The majority of A... 详细信息

关键词： Alzheimer al. cases

Containment Problem for Quasi Star Configurations of Points in P^2

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Algebra Colloquium 2018年第4期25卷 661-670页

作者： hassan Haghighi Mohammad Mosakhani Faculty of Mathematics K.N.Toosi University of TechnologyTehranIran

In this paper,the containment problem for the defining ideal of a special type of zero-dimensional subscheme of P^2,the so-called quasi star configuration,is *** sharp bounds for the resurgence of these types of ideals are *** an application of this result,for every real number 0<ε<1/2,we construct an infinite family of homogeneous radical ideals of points in K[P^2]such that their resurgences lie in the interval[2-ε,2).Moreover,the Castelnuovo-Mumford regularity of all ordinary powers of defining ideal of quasi star configurations are *** particular,it is shown that all of these ordinary powers have a linear resolution.

关键词： symbolic power resurgence Waldschmidt constant quasi star configuration containment problem

Mineralogy, Geochemistry and Geotectonic of Plagiogranites from Shahre-Babak Ophiolite, Zagros Zone, Iran

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Journal of Earth Science 2016年第3期27卷 507-518页

作者： Fatemeh Sepidbar hassan Mirnejad Department of Geology University of Tehran Department of Earth and Environmental Earth Sciences Miami University

Shahre-Babak ophiolite is a part of the inner Zagros ophiolite belt in Iran. Major parts of intrusive masses of Share-Babak ophiolite are gabbro and plagiogranite. The SiO2 versus Na2O＋K2O diagram shows that the palgiogranites are related to calk-alkaline series. Rare earth elements exhibit relatively similar pattern that indicates these rocks are syngenetic. Also, REE patterns display an enrichment of LREE compared to HREE, and are characterized by flat to slightly concaveup patterns from Gd to Yb. Such patterns contrast sharply with those of plagiogranites in more complete ophiolite sequences, such as the Semail ophiolite, Oman, or the Troodos ophiolite, Cyprus, and Neyriz, where patterns are much flatter and slightly LREE-depleted. The slightly LREE-enriched patterns of the Shahre-Babak plagiogranites support a partial melting origin for them. The low TiO2, Nb, Ta content and high LREE concentrations of the Shahre-Babak plagiogranites indicate that the rocks were likely derived from the anatexis of amphibolites, which were related to hydrothermal alteration of gabbros in intra-oceanic back-arc basin.

关键词： plagiogranite back-arc basin Share-Babak ophiolite Neo-Tethys Iran

Local Energy Dissipation/Transition in Field Effect Molecular Nanoelectronic Systems:a Quantum Mechanical Methodology

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Communications in Theoretical Physics 2019年第4期71卷 441-454页

作者： Reza Safari hassan Sabzyan Department of Chemistry Faculty of Science University of Qom Department of Chemistry University of Isfahan

Electronic and vibrational intra-molecular thermoelectric-like ?gures of merit(ZT_γ~M) are introduced for single molecule nanoelectronic system, using quantum theory of atoms in molecule. These ?gures of merit are used to describe intra-molecular or local energy dissipation/transition(as in Joule-like, Peltier-like, and Thomson-like effects) in?eld effect molecular devices. The ZT_γ~M?gures of merit are computed for two proposed molecular devices. Analysis of the results shows that ZT_γ~Mdepends almost non-linearly on the electric ?eld(EF) strength. Also, the intra-molecular Joule-like heating plays a dominant role in the local energy dissipation, and intra-molecular Thomson-like heating is generally larger than the intra-molecular Peltier-like heating. Introduction of ZT_γ~Mcan be applied to extend the analysis of thermoelectric heating down to molecular and intra-molecular levels, and thus can be used to predict characteristics and performance of any candidate multi-terminal or multi-pole molecular systems prior to their application in real nanoelectronic circuits.

关键词： intra-molecularheattransfer local energy dissipation fieldeffect molecular device nanoelectronic devices QTAIM

Crystallization Conditions and Mineral Chemistry in the East of Tafresh, Central Iran, with Insights into Magmatic Processes

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Acta Geologica Sinica(English Edition) 2019年第6期93卷 1755-1772页

作者： Davood RAEISI hassan MRNEJAD Department of Geology Faculty of ScienceUniversity of TehranTehranIran Department of Geology and Environmental Earth Sciences Miami UniversityOxfordOhioUSA

The Tafresh granitoids are located at the central part of the Urumieh-Dokhtar Magmatic Arc(UDMA)in *** rocks,mainly consisting of diorite and granodiorite,were emplaced during the Early *** are composed of varying proportions of plagioclase+K-feldspar+hornblende±quartz±*** diagrams and chemical indices of amphibole phases reveal a calc-alkaline affinity and fall clearly in the crust-mantle mixed source *** estimated pressure,derived from Al in amphibole barometry,is approximately 3 *** granitoids are I-type,metaluminous and belong to the calc-alkaline *** are all enriched in light rare earth elements and large ion lithophile elements,depleted in high field strength elements and display geochemical features typical of subduction-related calc-alkaline arc *** crystal size distribution(CSD)line patterns from the granitoids show a non-straight trend which points to the effect of physical processes during *** presence of numerous mafic enclaves,sieve texture and oscillatory zoning along with the CSD results show that magma mixing in the magma chamber had an important role in the petrogenesis of Tafresh ***,the CSD analysis suggests that the plagioclase crystals were crystallized in a time span of less than 1000 years,which is indicative of shallow depth magma crystallization.

关键词： crust-mantle mixed source I-type subduction crystal size distribution magma mixing Urumieh-Dokhtar Magmatic Arc

A Novel Investigation on Using Strain in Barriers of 1.3 μm AlGaInAs-InP Uncooled Multiple Quantum Well Lasers

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Communications in Theoretical Physics 2010年第9期54卷 529-535页

作者： Vahid BahramiYekta hassan Kaatuzian Photonics Research Laboratory(P.R.L) Department of Electrical EngineeringAmirkabir University of Technology

In this study we investigate strain effect in barriers of 1.3 μm AlCalnAs-InP uncooled multiple quantum well lasers. Single effective mass and Kohn-Luttinger Harniltonian equations have been solved to obtain quantum states and envelope wave functions in the structure. In the case of unstrained barriers, our simulations results have good agreement with a real device fabricated and presented in one of the references. Our main work is proposal of 0.2% compressive strain in the structure Barriers that causes significant reduction in Leakage current density and Auger current density characteristics in 85 ℃. 20% improvement in mode gain-current density characteristic is also obtained in 85 ℃.

关键词： multiple quantum well laser semiconductor laser strain in barrier uncooled

New Exact Solutions of Two Nonlinear Physical Models

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Communications in Theoretical Physics 2010年第4期53卷 596-604页

作者： M.M.hassan Mathematics Department Faculty of Science Minia University

Abundant new exact solutions of the Schamel-Korteweg-de Vries （S-KdV） equation and modified Zakharov- Kuznetsov equation arising in plasma and dust plasma are presented by using the extended mapping method and the availability of symbolic computation. These solutions include the Jacobi elliptic function solutions, hyperbolic function solutions, rational solutions, and periodic wave solutions. In the limiting cases, the solitary wave solutions are obtained and some known solutions are also recovered.

关键词： modified Zakharov-Kuznetsov equation Schamel-Korteweg-de Vries equation traveling and periodic wave solutions extended mapping method

On Generalized Douglas–Weyl(α, β)-Metrics

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Acta Mathematica Sinica,English Series 2015年第10期31卷 1611-1620页

作者： Akbar TAYEBI hassan SADEGHI Department of Mathematics Faculty of Science University of Qom

In this paper, we study generalized Douglas-Weyl （α,β）-metrics. Suppose that a regular （α,β）-metric F is not of Randers type. We prove that F is a generalized Douglas-Weyl metric with vanishing S-curvature if and only if it is a Berwald metric. Moreover, by ignoring the regularity, if F is not a Berwald metric, then we find a family of almost regular Finsler metrics which is not Douglas nor Weyl. As its application, we show that generalized Douglas-Weyl square metric or Matsumoto metric with isotropic mean Berwald curvature are Berwald metrics.

关键词： Generalized Douglas Weyl metric Weyl metric Douglas metric S-curvature

Impact of Drain Effluent on Surficial Sediments in the Mediterranean Coastal Wetland: Sedimentological Characteristics and Metal Pollution Status at Lake Manzala, Egypt

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Journal of Ocean University of China 2019年第4期18卷 834-848页

作者： FARHAT hassan I. Geology Department Faculty of Science Suez University

Surface sediments were collected from Lake Manzala, the Mediterranean coastal wetland located to the east of the Nile Delta, Egypt, to assess the effect of drain effluent on the spatial variations of sedimentary characteristics and heavy metal pollution. Grain-size compositions, textures, and heavy metal distribution patterns in sediments are presented using GIS technique. Results of the analysis of the sediment showed a clear effect of drain effluent, with an increase in fine fractions and homogeneous suspensions in transportation mode. Lake sediments were dominated by sandy mud textures, and mode of transportation was homogeneous sus- pension and rolling. Spatial distribution of heavy metals (Fe, Mn, Zn, Cu, Ni, Cr, and Pb) was studied in the lake’s surficial sediments, along with their relationship to drain effluent and their contamination status in the ecological system. Heavy metal pollution status was assessed by means of accepted sediment quality guidelines and contamination assessment methods (contamination factor, con- tamination degree, modified contamination degree, geo-accumulation, and enrichment factor). Among the determined heavy metals, Pb had the most ecological risk. Generally, the heavy metals in the surface sediments indicated pollution risk ranging from moderate to considerable, particularly, in those sites facing drains and inlets that had the highest toxic effluent. The results were interpreted by statistical means. A cluster analysis defined areas facing drain discharge and inlets as separated groups. ANOVA indicated that most of the sedimentation and studied metals directed this clustering.

关键词： Lake Manzala Mediterranean wetland metal pollution sedimentological characteristics