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Zn(NO_3)_2·6H_2O/2,4,6-trichloro-1,3,5-triazine(TCT) a mild and selective system for nitration of phenols

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Chinese Chemical Letters 2010年第4期21卷 403-406页

作者： Firouzeh Nemati hossein Kiani Department of Chemistry Faculty of ScienceSemnan UniversitySemnanIran

Certain phenols and naphthols were nitrated regioselectively with Zn(NO)·6HO/TCT in acetonitrile as solvent at room temperature and short reaction time in good *** reaction condition was *** is a cheap and commercial... 详细信息

关键词： Nitration Phenols 2 4 6-Trichloro-l 3 5-triazine Regioselective

Numerical simulation of tire/soil interaction using a verified 3D finite element model

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Journal of Central South University 2014年第2期21卷 817-821页

作者： Namjoo Moslem Golbakhshi hossein Department of Agricultural Machinery Engineering Faculty of AgricultureUniversity of Jiroft

The compaction and stress generation on terrain were always investigated based on empirical approaches or testing methods for tire/soil ***,the analysis should be performed for various tires and at different soil *** the increasing capacity of numerical computers and simulation software,finite element modeling of tire/terrain interaction seems a good approach for predicting the effect of change on the *** this work,an elaborated 3D model fully complianning with the geometry of radial tire 115/60R13 was established,using commercial code Solidwork *** hyper-elastic and incompressible rubber as tire main material was analyzed by Moony-Rivlin *** Drucker-Prager yield criterion was used to model the soil *** show that the model realistically predicts the laboratory tests outputs of the modeled tire on the soft soil.

关键词： tire/soil interaction finite element method(FEM) soil compaction stress distribution inflation pressure

A Green and Highly Efficient Protocol for Catalyst-free Kno- evenagel Condensation and Michael Addition of Aromatic Al- dehydes with 1,3-Cyclic Diketones in PEG-400

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Chinese Journal of Chemistry 2011年第11期29卷 2407-2410页

作者： Firouzeh, Nemati hossein, Kiani Department of Chemistry Faculty of Science Semnan University Semnan Iran

A convenient, highly efficient and green approach for synthesis of tetraketones from aromatic aldehydes with dimedone and 1,3-indanedione at room temperature in PEG-400 is described. The use of PEG-400 as the reaction medium and avoiding the use of any catalyst makes the process environmentally benign. Seven new compounds are reported.

关键词： Michael addition green chemistry polyethelene glycol Knoevenagel condensation dimedone,1,3-Indanedione

Effects of Annealing on the Fabrication of Al-TiAl3 Nanocomposites Before and After Accumulative Roll Bonding and Evaluation of Strengthening Mechanisms

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Acta Metallurgica Sinica(English Letters) 2022年第4期35卷 636-650页

作者： Zohreh Yazdani Mohammad Reza Toroghinejad hossein Edris Department of Materials Engineering Isfahan University of Technology84156-83111 IsfahanIran

The strengthening mechanisms of Al-TiAl_(3) nanocomposite, fabricated using cold roll bonding, annealing, and accumulative roll bonding(ARB) on Al sheets sandwiching with pure Ti powder were investigated in the present study. With annealing at 590 ℃ for 2 h, TiAl_(3) intermetallic compound was formed. After subsequent ARB process up to 5 cycles, final composite consists of ultrafine Al grains of less than 500 nm with TiAl_(3) particles larger than 200 nm. The strength and hardness of the final composite are 2.5 and 3.5 times the initial values, with an ultimate tensile strength of 400 MPa, which is dominated by grain-boundary strengthening due to the ultrafine Al grains, and Orowan strengthening due to the small TiAl_(3) particles. For comparison, an alternative fabrication route of cold roll bonding–ARB–annealing was also studied. This study showed that annealing before ARB is a critical factor in producing an ultrafine grain structure containing TiAl_(3) particles.

关键词： Composite Annealing Strength Microstructure Al

Mild,convenient and efficient synthesis of novel 2,2-dichloro-1,3-diarylaziridines from Schiff bases by phase transfer CTAB catalysis under low concentration alkaline conditions

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Chinese Chemical Letters 2011年第11期22卷 1273-1276页

作者： hossein Naeimi Khadijeh Rabiei Department of Organic Chemistry Faculty of Chemistry University of Kashan

A mild and efficient method for preparation of novel 2,2-dichloro-1,3-diarylaziridines from Schiff base compounds in the presence of Ar-cetyl-N,N,N-trimethyl ammonium bromide（CTAB） as phase transfer catalyst has been *** reaction is dramatically enhanced in the presence of quaternary ammonium *** corresponding products have been obtained in excellent yields,high purity and short reaction times.

关键词： Aziridine Synthesis Schiff base CTAB Phase transfer catalyst

Histological and biochemical alterations in early-stage lobar ischemia-reperfusion in rat liver

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World Journal of Gastroenterology 2009年第16期15卷 1951-1957页

作者： hossein Ali Arab Farhang Sasani Mohammad hossein Rafiee Ahmad Fatemi Abbas Javaheri Department of Pharmacology Faculty of Veterinary MedicineUniversity of Tehran Department of Pathology Faculty of Veterinary MedicineUniversity of Tehran Faculty of Veterinary Medicine University of Semnan

AIM： To investigate the structural and biochemical changes in the early stage of reperfusion in the rat livers exposed to lobar ischemia-reperfusion （IR）. METHODS： The median and left lobes of the liver were subjected to 60 min ischemia followed by 5, 10, 30, 45, 60 and 120 min reperfusion. Blood samples were taken at different time intervals to test enzyme activities and biochemical alterations induced by reperfusion. At the end of each reperfusion period, the animals were killed by euthanasia and tissue samples were taken for histological examination and immunohistochemistry. RESULTS： Cell vacuolation, bleb formation and focal hepatitis were the most important changes occur during ischemia. While some changes including bleb formation were removed during reperfusion, other alterations including portal hepatitis, inflammation and the induction of apoptosis were seen during this stage. The occurrence of apoptosis, as demonstrated by apoptotic cells and bodies, was the most important histological change during reperfusion. The severity of apoptosis was dependent on the time of reperfusion, and by increasing the time of reperfusion, the numbers of apoptotic bodies was significantly enhanced. The amounts of lactate dehydrogenase, alanine aminotransferase, aspartate aminotransfrase, creatinine and urea were significantly increased in serum obtained from animals exposed to hepatic IR. CONCLUSION： Inflammation and subsequent apoptotic cell death were the most important changes in early-stage hepatic reperfusion injury, and the number of apoptotic bodies increased with time of reperfusion.

关键词： Lobar ischemia Liver Reperfusion injury Apoptosis Immunohistochemistry

Designing a nuclear battery based on the Mo-99 radioactive source soluble in water and aqua regia in order to use in early tests

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Nuclear Science and Techniques 2019年第3期30卷 37-45页

作者： Zohreh Movahedian hossein Tavakoli-Anbaran Faculty of Physics and Nuclear Engineering Shahrood University of Technology

Today, millions of electrocommunication, electric, medical, and industrial devices use battery. Batteries with long life and high energy density seem to be essential in medical, military, oil and mining, aerospace areas as well as conditions in which access is difficult and in situations where replacement or recharging of battery is *** this regard, the use of radiation energy resulting from radioactive materials and its conversion to electric energy can be effective in making batteries. In the present study,various Mo-99 radioisotope values with a half-life of 65.98 h were used as a soluble radioactive source in two materials of water and aqua regia. Then, by comparing the results of the Monte Carlo simulations program MCNPX for these two solutions, it was found that when the water is used instead of aqua regia(for idealization), the values of the superficial current of electrons, the volumetric flux of electrons, and the deposited energy in the volume containing the radioactive solution increased by 10.80, 4.10,and 13.80%, respectively. Also, the short-circuit current and energy conversion efficiency of this battery with a concentration of 0.01 molar, Mo-99 dissolved in the aqua regia are 0.79μA and 16.47%, respectively.

关键词： Nuclear battery Radioactive solution MCNPX code Mo-99

Calculation of the structural properties of asymmetrical nuclear matter

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Research in Astronomy and Astrophysics 2012年第3期12卷 345-358页

作者： Gholam hossein Bordbar Hamideh Nadgaran Department of Physics Shiraz University Research Institute for Astronomy and Astrophysics of Maragha

The structural properties of asymmetrical nuclear matter have been calculated,employing the AV 18 potential for different values of proton to neutron *** calculations have also been made for the case of symmetrical nuclear matter with the UV14,AV14 and AV 18 *** our calculations,we used the lowest order constrained variational method to compute the correlation function of the system.

关键词： stars:neutron—dense matter—equation of state

Economic Profit Enhancement of a Demand Response Aggregator Through Investment of Large-scale Energy Storage Systems

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CSEE Journal of Power and Energy Systems 2022年第5期8卷 1468-1476页

作者： hossein Karimianfard Mohammad Reza Salehizadeh Pierluigi Siano Department of Electrical Engineering Marvdasht BranchIslamic Azad UniversityMarvdashtIran Department of Management&Innovation Systems University of Salerno Via Giovanni Paolo II132Fisciano(SA)-84084 Italy Department of Electrical and Electronic Engineering Science University of JohannesburgJohannesburg 2006South Africa

To provide flexibility for the operation of smart electricity networks,a large number of scattered demand response resources are managed by a demand response aggregator(DRA).Increasing the economic viability of this new entity,i.e.,DRA,has attracted a great deal of attention in recent *** this direction,this paper proposes stochastic model of multiple large-scale energy storage system(LESS)investments from the perspective of a DRA.A LESS directly connects to smart distribution networks and provides the possibility to save energy costs and thereafter increase the energy efficiency of the *** this paper,a novel mixed-integer model is proposed to determine the optimal capacity and operation of a LESS in coordination with a DR *** model,as a main contribution to literature,comprises novel managerial options,such as the number of allowed DR actions,the number of allowed charging and ***,the model is designed to be capable enough to exclude the hours in which the demand side is not allowed to participate in *** proposed model is tested through a numerical example with various case *** simulation results show the substantial economic impacts of considering the introduced managerial options in the coordination of a LESS operation with DR.

关键词： Demand response distribution network energy energy storage