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Expeditious solvent-free synthesis of 1,3-thiazolanes via multicomponent reactions

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Chinese Chemical Letters 2014年第5期25卷 794-796页

作者： Zinatossadat Hossaini Faramarz Rostami-Charati Mahboube Eslami Moghadam fatemeh moghaddasi-Kochaksaraee Department of Chemistry Qaemshahr BranchIslamic Azad University Department of Chemistry Faculty of ScienceGonbad Kavous University Chemistry & Chemical Engineering Research Center of Iran

A series of 1 3-thiazolane derivatives have been synthesized via multicomponent reactions of activated acetylenes,primary amines and isothiocyanates in the presence of a catalytic amount of Nmethylimidazole under solv... 详细信息

关键词： 1 3-Thiazolane Activated acetylenes Primary amines Solvent-free Arylisothiocyanate

Antiviral optical techniques as a possible novel approach to COVID-19 treatment

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Journal of Innovative Optical Health Sciences 2021年第3期4卷 1-18页

作者： Fereshteh Moshfegh Farshad Khosraviani Negar moghaddasi Seyedeh fatemeh Seyed Javadi Limoodi Ebrahim Boluki Department of Dentistry New Vision University 1a Evgeni Mikeladze StreetTbilisi 0159Georgia School of Dentistry University of California Los Angeles10833 Le Conte CHSCA 90095USA School of Dentistry Shiraz University of Medical Sciences Zand Street P.O. School of Dentistry Tehran University of Medical Sciences North Karegar Street P.O. Blood Transfusion Research Center High Institute for Research&Education in Transfusion Medicine TehranIran

The current pandemic SARS-CoV-2(also known as 2019-nCoV and COVID-19)viral infection is growing globally and has created a disastrous situation all over the *** of the biggest challenges is that no drugs are available to treat this life-threatening *** no drugs are available for definitive treatment of this disease and the mortality rate is very high,there is an utmost need to cure the infection using novel *** study will point out some new antimicrobial technologies that have great potentials for eradicating and preventing emerging *** can be considered as treatments of choice for viral infections in the future.

关键词： SARS-CoV-2 COVID-19 light therapy photodynamic therapy photocatalysis ARDS

Seismic analysis of diagrid structural frames with shear-link fuse devices

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Earthquake Engineering and Engineering Vibration 2013年第3期12卷 463-472页

作者： Nasim S. moghaddasi B. Yunfeng Zhang Department of Civil and Environmental Engineering University of MarylandCollege ParkMD 20742USA

This paper presents a new concept for enhancing the seismic ductility and damping capacity of diagrid structural frames by using shear-link fuse devices and its seismic performance is assessed through nonlinear static and dynamic analysis. The architectural elegancy of the diagrid structure attributed to its triangular leaning member configuration and high structural redundancy make this system a desirable choice for tall building design. However, forming a stable energy dissipation mechanism in diagrid framing remains to be investigated to expand its use in regions with high seismicity. To address this issue, a diagrid framing design is proposed here which provides a competitive design option in highly seismic regions through its increased ductility and improved energy dissipation capacity provided by replaceable shear links interconnecting the diagonal members at their *** structural characteristics and seismic behavior （capacity, stiffness, energy dissipation, ductility） of the diagrid structural frame are demonstrated with a 21-story building diagrid frame subjected to nonlinear static and dynamic analysis. The findings from the nonfinear time history analysis verify that satisfactory seismic performance can be achieved by the proposed diagrid frame subjected to design basis earthquakes in California. In particular, one appealing feature of the proposed diagrid building is its reduced residual displacement after strong earthquakes.

关键词： diagrid structure nonlinear analysis seismic behavior shear link steel structure

Seismic retrofitting of reinforced concrete frame structures using GFRP-tube-confined-concrete composite braces

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Earthquake Engineering and Engineering Vibration 2012年第1期11卷 91-105页

作者： Nasim S. moghaddasi B Zhang Yunfeng Hu Xiaobin Department of Civil and Environmental Engineering University of Maryland College Park MD 20742 USA School of Civil and Architecture Engineering Wuhan University Wuhan 430072 China

This paper presents a new type of structural bracing intended for seismic retrofitting use in framed structures. This special composite brace, termed glass-fiber-reinforced-polymer （GFRP）-tube-confined-concrete composite brace, is comprised of concrete confined by a GFRP tube and an inner steel core for energy dissipation. Together with a contribution from the GFRP-tube confined concrete, the composite brace shows a substantially increased stiffness to control story drift, which is often a preferred feature in seismic retrofitting. An analysis model is established and implemented in a general finite element analysis program - OpenSees, for simulating the load-displacement behavior of the composite brace. Using this model, a parametric study of the hysteretic behavior （energy dissipation, stiffness, ductility and strength） of the composite brace was conducted under static cyclic loading and it was found that the area ratio of steel core to concrete has the greatest influence among all the parameters considered. To demonstrate the application of the composite brace in seismic retrofitting, a three-story nonductile reinforced concrete （RC） frame structure was retrofitted with the composite braces. Pushover analysis and nonlinear time-history analyses of the retrofitted RC frame structure was performed by employing a suite of 20 strong ground motion earthquake records. The analysis results show that the composite braces can effectively reduce the peak seismic responses of the RC frame structure without significantly increasing the base shear demand.

关键词： brace composite confined concrete glass-fiber-reinforced polymer frame nonlinear analysis retrofit seismic

The Maastrichtian-Danian in the SW Zagros Fold-Thrust Belt(S. Iran):An Integration of Planktonic Foraminiferal Biostratigraphy and Gamma-Ray Spectrometry

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Acta Geologica Sinica(English Edition) 2020年第5期94卷 1339-1363页

作者： Abdolreza moghaddasi Hossein VAZIRI-MOGHADDAM Ali SEYRAFIAN Department of Geology Faculty of SciencesUniversity of IsfahanIsfahanIran

In this study, the Maastrichtian-Danian boundary was measured and sampled in two stratigraphic sections, the north and south flanks of the Dehnow anticline in Coastal Fars, Southern Iran. This boundary was also investigated in the drilled exploratory well-1 in the same region. The lithology of the Maastrichtian-Danian deposits consists of glauconitic, phosphatic argillaceous limestones and marlstones. 30 genera and 77 species of planktonic foraminifera have been determined. The recognized biozones are the Gansserina gansseri Interval Zone, and the Contusotruncana contusa Interval Zone, which indicates latest Campanian to middle Maastrichtian age for the upper part of the Gurpi Formation. In addition, the Eoglobigerina edita(P1) Partial Range Zone, Praemurica uncinata(P2) Lowest Occurrence Zone, Morozovella angulata(P3) Lowest Occurrence Zone and Globanomalina psudomenardii(P4) Taxon Range Zone represent a Danian to Thanetian age for the lower part of the Pabdeh Formation. From the absence of the Abathomphalus mayaroensis Interval Zone, Pseudoguembelina hariaensis Interval Zone, Pseudotextularia elegans Interval Zone, Plummerita hantkeninoides Interval Zone, Guembelitria cretacea(P0) Partial Range Zone and Parvularugoglobigerina eugubina(Pα) Total Range Zone, it can be deduced that there is a paraconformity across the Maastrichtian–Danian boundary in the studied area, this hiatus encompassing the late Maastrichtian and the earliest Danian. Danian deposits from the study area contain reworked glauconitized macrofossils, planktonic and benthic foraminifera of the Cretaceous. The obtained surface gamma-ray spectrometry logs resemble the exploratory well-1 gamma-ray wireline log.

关键词： biostratigraphy planktonic foraminifera gamma-ray spectrometry Maastrichtian-Danian Zagros Iran

On the structural and optical properties investigation of annealed Zn nanorods in the oxygen flux

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Chinese Physics B 2021年第11期30卷 580-589页

作者： fatemeh Abdi Department of Engineering Sciences Faculty of Advanced TechnologiesUniversity of Mohaghegh ArdabiliNaminIran

Zn nano rods were produced on glass substrates using oblique angle deposition method at different deposition *** oxidation,the samples were placed in a furnace under oxygen *** and FESEM images were used to morphology analysis of the *** results showed that with increasing the angle of deposition,the grain size decreases and the porosity of the structures *** pattern and XPS depth profile analysis were used to crystallography and oxide thickness investigations,*** XRD results confirmed oxide phase formation,and the XPS results analyzed the oxide layer *** result showed that as the deposition angle of the nanorods increases,the thickness of the oxide layer *** reason for the increase in the thickness of the oxide layer with increasing deposition angle was investigated and attributed to the increase in the porosity of the thin *** optical spectra of the structures for p polarized light at 10incident light angle were obtained using single beam spectrophotometer in the 300 nm to 1000 nm *** results showed that the formed structures although annealed in oxygen flux,tend to behave like *** calculate the optical constant of the structures,the reverse homogenization theory was used and the void fraction and complex refractive index of the structures were ***,by calculating permittivity and optical conductivity of the structures,their changes with the deposition angle were investigated.

关键词： nano rod optical spectra refractive index reverses homogenization

High-order phase-field model with the local and second-order max-entropy approximants

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Frontiers of Structural and Civil Engineering 2019年第2期13卷 406-416页

作者： fatemeh AMIRI Department of Mechanical Engineering Isfahan University of TechnologyIsfahan 84156-83111Iran School of Mathematics Institute for Research in Fundamental Sciences (1PM)Tehran 19395-5746Iran

We approximate the fracture surface energy functional based on phase-field method with smooth local maximum entropy (LME) and second-order maximum entropy (SME) approximants. The higher-order continuity of the meshfree methods such as LME and SME approximants allows to directly solve the fourth-order phase-field equations without splitting the fourth?ordcr differential equation into two second-order differential equations. We will first show that the crack surface functional can be captured more accurately in the fourth-order model with smooth approximants such as LME, SME and B-spline. Furthermore, smaller length scale parameter is needed for the fourth-order model to approximate the energy functional. We also study SME approximants and drive the formulations. The proposed meshfree fourth-order phase-field formulation show more stable results tor SME compared to LME meshfree methods.

关键词： second-order maximum entropy local maximum entropy second-and fourth-order phase-field models B-spline

Fabrication of Modified Fibrous Filters by Electrospinning and Investigating Their Application as Improved Face Masks

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Chinese Journal of Polymer Science 2024年第11期42卷 1738-1748,I0010页

作者： Mehdi Mahmoudian fatemeh Zanbili Nanotechnology Research Group Faculty of ScienceUrmia UniversityUrmia57159-404931Iran Department of Nanochemistry Nanotechnology Research CenterUrmia UniversityUrmia57159-404931Iran

Owing to the significant increase in air pollutants and the spread of infectious diseases,it seems that the use of face masks will become an essential item in human ***,there is a need to conduct more research to develop novel types of respirators utilizing upto-date science such as *** this study,we fabricated a nanocomposite fibrous filter containing modified graphene oxide(GO)and zinc oxide(ZnO)*** layer was used as an active filter for absorbing and removing air pollutants,such as suspended submicron particles(below 2.5 microns)and CO_(2),NO_(2),and SO_(2)*** synthesized nanostructures and fibrous filters were characterized by different analysis(FTIR,XRD,TGA,and FESEM),and the performance of the filters was surveyed by tests such as pressure drop,CO_(2),NO_(2),SO_(2)gas rejection,and particulate *** results showed that the stabilization of the modified GO and ZnO nanostructures on the fibrous filter improved the effectiveness of this filter as a mask for removing toxic particles and gases,and the filter containing nanoparticles had the best performance.

关键词： Air pollutants Face masks Nanocomposite fibrous filter Electrospinning

Investigation into mechanisms and kinetics of asphaltene aggregation in toluene/n-hexane mixtures

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Petroleum Science 2020年第2期17卷 457-466页

作者： Bahram Soltani Soulgani fatemeh Reisi fatemeh Norouzi Department of Petroleum Engineering Petroleum University of TechnologyAhwazKhouzestanIran

Determining the rate of asphaltene particle growth is one of the main problems in modeling of asphaltene precipitation and *** this paper,the kinetics of asphaltene aggregation under different precipitant concentrations have been *** image processing method was performed on the digital photographs that were taken by a microscope as a function of time to determine the asphaltene aggregation growth *** results of image processing by MATLAB software revealed that the growth of asphaltene aggregates is strongly a function of *** regions could be recognized during asphaltene particle growth including reaction-and diffusion-limited aggregation followed by reaching the maximum asphaltene aggregate size and start of asphaltene settling and the final *** has been carried out to predict the growth of asphaltene particle size based on the fractal *** equations have been developed for kinetics of asphaltene aggregation for reaction-limited aggregation and diffusion-limited *** maximum size of asphaltene aggregates and settling time were modeled by using force balance,acting on asphaltene *** of modeling show a good agreement between laboratory measurements and model calculations.

关键词： Asphaltene precipitation Kinetic modeling Diffusion-limited aggregation(DLA) Image processing Asphaltene aggregation