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International Journal of Oral Science 2021年第2期13卷 117-128页

作者： Sevda Pouraghaei Sevari Sahar Ansari alireza Moshaverinia Weintraub Center for Reconstructive Biotechnology Division of Advanced ProsthodonticsSchool of DentistryUniversity of CaliforniaLos AngelesLos AngelesCAUSA California NanoSystems Institute University of CaliforniaLos AngelesLos AngelesCAUSA

Tissue engineering approaches have emerged recently to circumvent many limitations associated with current clinical *** elegant approach utilizes a natural/synthetic biomaterial with optimized physiomechanical properties to serve as a vehicle for delivery of exogenous stem cells and bioactive factors or induce local recruitment of endogenous cells for in situ tissue *** by the natural microenvironment,biomaterials could act as a biomimetic three-dimensional(3D)structure to help the cells establish their natural *** a strategy should not only employ a biocompatible biomaterial to induce new tissue formation but also benefit from an easily accessible and abundant source of stem cells with potent tissue regenerative *** human teeth and oral cavity harbor various populations of mesenchymal stem cells(MSCs)with self-renewing and multilineage differentiation *** the current review article,we seek to highlight recent progress and future opportunities in dental MSC-mediated therapeutic strategies for tissue regeneration using two possible approaches,cell transplantation and cell ***,this paper develops a general picture of current innovative strategies to employ dental-derived MSCs combined with biomaterials and bioactive factors for regenerating the lost or defective tissues and offers information regarding the available scientific data and possible applications.

关键词： biomaterials utilizing utilize

Influence of bean rhizosphere on the biological properties and phosphorus fractionation in the calcareous soils amended with municipal sewage sludge

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Journal of Arid Land 2015年第5期7卷 644-652页

作者： Tahereh RAIESI alireza HOSSEINPUR Hamideh RAIESI Horticultural Science Research Institute Citrus and Subtropical Fruit Research Center Agricultural Research and Education Organization (AREO) Department of Soil Science College of Agriculture Shahrekord University Department of Plant Protection College of Agriculture Guilan University

The biological and chemical conditions of the rhizosphere are known to considerably differ from those of the bulk soil, as a consequence of a range of processes that are induced either directly by the activity of plant roots or indirectly by the stimulation of microbial population and activity in the rhizosphere. Information about phosphorus （P） fractionation in the rhizosphere soils amended with municipal sewage sludge （MSS） is limited, were We carried out greenhouse experiments using a rhizobox in order to evaluate the effects of bean rhizosphere on the various inorganic P （Pi） fractions, organic P （Po）, P in particulate fraction （PF-P）, Olsen-P, dissolved organic C （DOC）, microbial biomass P （MBP） and alkaline phosphatase （ALP） enzyme in 10 calcareous soils amended with MSS （10 g MSS was added to 1 kg soil）. Non-occluded P, occluded P, calcium phosphate and residual P were also quantitated. The results showed that DOC, MBP and ALP activity strongly increased and PF-P and Olsen-P de- creased in the rhizosphere soils compared with in the bulk soils （P〈0.05）. The contents of non-occluded P, oc- cluded P and residuaI-P fractions in the rhizosphere soils were lower than in the bulk soils, while the contents of calcium phosphate and organic P in the rhizosphere soils were higher than in the bulk soils. Simple correlation coefficients showed that P uptake had positive relationship with non-occluded P, occluded P, calcium phosphate fractions and PF-P in the rhizosphere soils. The results suggest that the short-term application of MSS to the cal- careous soils may increase Po and calcium phosphate fractions in the rhizosphere soils, and calcium phosphate fraction is potentially available to crops.

关键词： biological properties mineral phosphorus organic phosphorus semi-arid land

Uncertainty of parton distribution functions due to physical observables in a global analysis

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Chinese Physics C 2017年第2期41卷 41-49页

作者： alireza Aleedaneshvar Muhammad Goharipour Saeedeh Rostami Physics Department 35131-19111 Semnan University Semnan Iran

The recent measurement of the differential γ ＋ c-jet cross section, performed at the Tevatron collider in Run II by the D0 collaboration, is studied in a next-to-leading order（NLO） global QCD analysis to assess its impact on the proton parton distribution functions（PDFs）. We show that these data lead to a significant change in the gluon and charm quark distributions. We demonstrate also that there is an inconsistency between the new high precision HERA I＋II combined data and Tevatron measurement. Moreover, in this study we investigate the impact of older EMC measurements of charm structure function F_c^2 on the PDFs and compare the results with those from the analysis of Tevatron data. We show that both of them have the same impact on the PDFs, and thus can be recognized as the same evidence for the inefficiency of perturbative QCD in dealing with charm production in some kinematic regions.

关键词： parton distribution functions heavy quark PDFs photon production Tevatron

Analyzing solubility of acid gas and light alkanes in triethylene glycol

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Journal of Natural Gas Chemistry 2008年第1期17卷 51-58页

作者： alireza Bahadori Hari B.Vuthaluru Saeid Mokhatab Department of Chemical Engineering Curtin University of TechnologyGPO Box 1987PerthWA 6845Australia Process Technology Manager Tehran Raymand Consulting EngineersTehranIran

Physical solvents such as ethylene glycol （EG）, diethylene glycol （DEG）, and triethylene glycol （TEG） are commonly used in wet gas dehydration processes with TEG being the most popular due to ease of regeneration and low solvent losses. Unfortunately, TEG absorbs significantly more hydrocarbons and acid gases than EG or DEG. Quantifying this amount of absorption is therefore critical in order to minimize hydrocarbon losses or to optimize hydrocarbon recovery depending on the objective of the process. In this article, a new correlation that fully covers the operating ranges of TEG dehydration units is developed in order to determine the solubility of light alkanes and acid gases in TEG solvent. The influence of several parameters on hydrocarbon and acid gas solubility including temperature, pressure, and solvent content is also examined.

关键词： solubility triethylene glycol acid gas hydrocarbon gas dehydration

EFFECTS OF VISCOUS DISSIPATION ON THERMALLY DEVELOPING FORCED CONVECTION IN A POROUS SATURATED CIRCULAR TUBE WITH AN ISOFLUX WALL

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Applied Mathematics and Mechanics(English Edition) 2006年第5期27卷 617-626页

作者： Kamel Hooman alireza Pourshaghaghy Arash Ejlali Mechanical Engineering Department Bushehr Engineering FacultyPersian Gulf UniversityBushehrIran Mechanical Engineering Department Faculty of EngineeringUniversity of TehranTehranIran Legal and Contracts Petropars Co.TehranIran

The viscous dissipation effect on forced convection in a porous saturated circular tube with an isoflux wall is investigated on the basis of the Brinkman flow model. For the thermally developing region, a numerical study is reported while a perturbation analysis is presented to find expressions for the temperature profile and the Nusselt number for the fully developed region. The fully developed Nusselt number found by numerical solution for the developing region is compared with that of asymptotic analysis and a good degree of agreement is observed.

关键词： forced convection viscous dissipation Brinkman model Darcy number Nusselt number

Investigation of the stability and hydrodynamics of Tetrosomus gibbosus carapace in different pitchangles

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Journal of Hydrodynamics 2019年第2期31卷 368-378页

作者： Mahyar Malekidelarestaqi alireza Riasi Hadi Moradi Mohammad Samadpour School of Mechanical Engineering University of TehranTehranIran Intelligent Systems Research Institute Sungkyunkwan UniversitySeoulKorea School of Electrics and Computer Engineering University of TehranTehranIran School of Mechanical Engineering Amirkabir University of TechnologyTehranIran

In this paper,stability properties of Tetrosomus gibbosus have been experimentally and numerically studied in pitching *** fish lives in southern offshores of *** usually live in extremely turbulent parts of seas and oceans,with high stability and maneuverability that has caught the attention of *** body shape let them swim with a quite rapid *** on Boxfishes have had influences on automotive and marine *** CAD file of the boxfish was created using optical *** a model was built and tested in a subsonic wind tunnel and a numerical study was conducted in virtual wind *** experimental results are consistent with the numerical ones and also support the findings of other studies on similar *** results show that the flow around the fish,which is a consequence of its body shape,tries to maintain the stable position of the fish by resisting against the external force tilting the fish from its stable horizontal *** ventral and dorsal keels of the boxfish generate column-like vortices in horizontal direction which play an imperative role in maintaining the stability of the fish.

关键词： Boxfish Tetrosomus gibbosus humpback turretfish hydrodynamic stability experimental fluid mechanics bio-inspired engineering

Geochemistry of platinum-group elements in the podiform chromitites and associated peridotites of the Nain ophiolites,Central Iran:Implications for geotectonic setting

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Acta Geochimica 2021年第5期40卷 752-772页

作者： Batoul Taghipour Somayeh Shabani alireza K Somarin Department of Earth Sciences Faculty of SciencesShiraz UniversityShirazIran Department of Geology Brandon UniversityBrandonMBCanada

The Nain ophiolite complex with an extent of[600 km2 is a part of the Central Iranian ophiolite,which is related to the opening and subsequent closure of the Neo-Tethys *** and serpentinized harzburgite in the Nain area host podiform chromitites that occur as three(eastern Hajhossein,western Hajhossein,and Soheil Pakuh)schlieren-type tabular and aligned massive lenses with various *** most common chromitite ore textures are massive,nodular,disseminated,and banded,reflecting crystal settling *** Cr#[Cr/(Cr+Al)]ranges from 0.43 to 0.81(average 0.63).The Mg#[Mg/(Mg+Fe2+)]varies from 0.25 to 0.78(average0.62).The Nain ophiolite and hosted chromitite are generally characterized by high Cr#,reflecting crystallization from a very hot boninite magma in a MORB *** high Cr#in the Nain chromitite also indicates a high degree of melting(15%–35%)of the depleted *** average total PGE content in the ophiolitic host rock(harzburgite and dunite)and chromite are 107 and 221 ppb,*** Nain ophiolite and chromitite have high IPGE/PPGE and negative Pt*(Pt/Pt*=0.6)anomaly,which is a characteristic of high Cr#*** U-shaped REE pattern of dunite host rock suggests the interaction of depleted mantle peridotite with boninitic *** data suggest that the Nain chromitites are related to the boninitic magma emplacement in a suprasubduction zone.

关键词： Nain chromitite Platinum group elements Ushaped REE pattern Boninitic magma Supra-subduction zone

Plant-based synthesis of NiO nanoparticles using salvia macrosiphon Boiss extract and examination of their water treatment

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Rare Metals 2020年第10期39卷 1134-1144页

作者： Zahra Sabouri Narges Fereydouni alireza Akbari Hasan Ali Hosseini alireza Hashemzadeh Mohammad Sadegh Amiri Reza Kazemi Oskuee Majid Darroudi Department of Chemistry University of Payame NoorTehran 19395-4697Iran Neurogenic Inflammation Research Center University of Medical SciencesMashhad ***Iran NanoBioEletrochemistry Research Center University of Bam Medical SciencesBam ***Iran Department of Biology University of Payame NoorTehran 19395-4697Iran Targeted Drug Delivery Research Center Institute of Pharmaceutical TechnologyUniversity of Medical SciencesMashhad ***Iran Nuclear Medicine Research Center University of Medical SciencesMashhad ***Iran Department of Modern Sciences and Technologies School of MedicineUniversity of Medical SciencesMashhad ***Iran

The goal of this study was to synthesize nickel oxide nanoparticles(NiO-NPs)by the sol-gel method,which involved the use of salvia macrosiphon Boiss plant extract,Ni(NO3)2·6 H2 O as a capping agent,and a nickel precursor,*** synthesized NiO-NPs were characterized by Fourier transform infrared spectroscopy(FTIR),ultraviolet-visible(UV-Vis)spectrophotometer,X-ray diffraction(XRD),field electron scanning electron microscopy(FESEM)/energy-dispersive X-ray spectroscopy(EDX),thermo-gravimetric analysis/differential thermal analysis(TGA/DTA)and vibrating sample magnetometer(VSM)***,according to the results of UV-Vis,the gap band of nanoparticles was calculated to be in the range of about 2.9-3.9 *** photocatalytic activity of nanoparticles on methylene blue(MB)degradation was investigated and according to the results,about 80%MB was apparently degraded in the presence of NiO-NPs under UV-A light(11 W)after 5 h in pH^*** have evaluated the cytotoxicity of NiO-NPs on the multiple tumor cells by materials method,and all the utilized concentrations were observed to cause non-toxic effects;therefore,it can be suggested that these samples have the potential of being employed in different fields of medicine.

关键词： Nickel oxide nanoparticles Sol-gel Photocatalytic degradation Salvia macrosiphon Boiss plant extract Cytotoxicity

Stability analysis of the Euler-Bernoulli beam with multi-delay controller

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Control Theory and Technology 2022年第3期20卷 338-348页

作者： alireza Jalili Rahmtati Genqi Xu Sohrab Effati Department of Mathematical Sciences Sharif University of TechnologyAzadi Ave.TehranIran Department of Mathematics Tianjin UniversityNankai DistrictTianjin300072China Department of Applied Mathematics Ferdowsi University of MashhadAzadi SquareMashhadIran

In this paper,we investigate the stabilization of an Euler-Bernoulli beam with time delays in the boundary *** boundary velocity feedback law is applied to obtain the closed-loop *** is shown that this system generates a C_(0-)semigroup of linear ***,the stability of the closed-loop system is discussed for different values of the controller constants and time delays via using spectral analysis and a suitable Lyapunov function.

关键词： Euler-Bernoulli beam Time delay Lyapunov method Spectral analysis

Effect of natural and synthetic fibers reinforcement on California bearing ratio and tensile strength of clay

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Journal of Rock Mechanics and Geotechnical Engineering 2021年第3期13卷 626-642页

作者： Mahdi Ghasemi Nezhad alireza Tabarsa Nima Latifi Department of Civil Engineering Faculty of EngineeringGolestan UniversityGorganIran Terracon Consultants Inc.5217 Linbar Dr#309NashvilleTN37211USA

Use of environmentally friendly approaches with the purpose of strengthening soil layers along with finding correlations between the mechanical characteristics of fiber-reinforced soils such as indirect tensile strength(ITS)and California bearing ratio(CBR)and as well as the evaluation of shear strength parameters obtained from the triaxial test would be very effective at geotechnical construction *** research was aimed at investigating the influence of natural fibers as sustainable ones including basalt(BS)and bagasse(BG)as well as synthetic polyester(PET)fibers on the strength behavior of clayey *** this end,the effects of various fiber contents(0.5%,1%and 2%)and lengths(2.5 mm,5 mm and 7.5 mm)were experimentally *** conducting ITS and CBR tests,it was found that increasing fiber content and length had a significant influence on CBR and ITS ***,2%of 7.5 mm-long fibers led to the largest values of CBR and *** CBR values of soil reinforced with PET,BS,and BG fibers were determined as 19.17%,15.43%and 13.16%,*** ITS values of specimens reinforced with PET,BS,and BG fibers were reported as 48.57 kPa,60.7 kPa and 47.48 kPa,*** results of the triaxial compression test revealed that with the addition of BS fibers,the internal friction angle increased by about 100%,and with the addition of PET fibers,the cohesion increased by about 70%.Moreover,scanning electron microscope(SEM)analysis was employed to confirm the *** relationship between CBR and ITS values,obtained via statistical analysis and used for the optimum design of road pavement layers,demonstrated that these parameters had high correlation *** outcomes of multiple linear regression and sensitivity analysis also confirmed that the fiber content had a greater effect on CBR and ITS values than fiber length.

关键词： Natural fibers Synthetic fibers Indirect tensile strength(ITS) California bearing ratio(CBR) Reinforced soil