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Preparation of 1-amidoalkyl-2-naphthol derivatives using barium phosphate nano-powders

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Chinese Chemical Letters 2016年第1期27卷 119-126页

作者： hadi Taghrir Majid Ghashang mohammad Najafi Biregan Devartment of Chemistry. Science and Research Branch Islamic Azad University Arak Iran Department of Chemistry Faculty of Sciences Najafabad Branch Islamic Azad University Najafabad Iran

Barium phosphate（Ba_3（PO_4）_2） nano-powder was successfully synthesized via a simple precipitation route without any surfactant. The prepared nano-powder was applied for the facile synthesis of 1-amidoalkyl-2-naph... 详细信息

关键词： Multi-component reaction 1-Amidoalkyl-2-naphthol Barium phosphate(Ba_3(PO_4)_2) 2-Hydroxydibenzofuran

Homogeneous and nanomolar detection of hydrazine by indigocarmine as a mediator at the surface of TiO_2 nanoparticles modified carbon paste electrode

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Chinese Chemical Letters 2012年第2期23卷 213-216页

作者： mohammad Mazloum-Ardakani Hossein Rajabi hadi Beitollahi Department of Chemistry Faculty of ScienceYazd UniversityYazd 89195-741Iran Department of Chemistry Faculty of ScienceYazd UniversityYazd 89195-741Iran Environment Department Research Institute of Environmental SciencesInternational Center for ScienceHigh Technology & Environmental SciencesKermanIran

The homogeneous electrocatalytic oxidation of hydrazine（HZ） has been studied by indigocarmine（IND） as a mediator at the surface of TiO_2 nanoparticles modified carbon paste electrode（TNMCPE）.Cyclic voltammetry was used to study the electrochemical behavior of IND at different scan *** voltammetric response of the modified electrode was linear against the concentration of HZ in the ranges of 3.0×l0^（-8）-7.0×10~6 mol/L with differential pulse voltammetry *** detection limit（3σ） was determined as 27.3 nmol/*** evaluate the applicability of the proposed method to real samples,the modified CPE was applied to the determination of HZ in water samples.

关键词： Hydrazine Indigocarmine TiO_2 nanoparticles Modified electrode Carbon paste electrode Nanomolar detection

Stripping voltammetric determination of Cd(Ⅱ)based on multiwalled carbon nanotube functionalized with 1-(2-pyridylazo)-2-naphthol

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Chinese Chemical Letters 2011年第12期22卷 1469-1472页

作者： Alireza Mohadesi hadi Beitollahi mohammad Ali Karimi Department of Chemistry Payame Noor UniversityTehran 19395-4697Iran Department of Chemistry Payame Noor University(PNU)P.O.Box 76175-559KermanIran Environmental Department Research Institute of Environmental SciencesInternational Center for SciencesHigh Technology and Environmental SciencesKermanIran Department of Chemistry & Nanoscience and Nanotechnology Research Laboratory(NNRL) Payame Noor University(PNU)SirjanIran

The present work has focused on the modification of multiwalled carbon nanotube with a ligand,l-（2-pyridylazo）-2-naphthol, and its potential application for the development of a new,simple and selective modified glassy carbon electrode for stripping voltammetric determination of Cd（Ⅱ）.The analytical curve for Cd（Ⅱ） ions covered the linear range varying from 0.8 up to 220.4μgL^（-1）.The limit of detection was found to be 0.1μgL^（-1）,while the relative standard deviation（RSD） at 50.0μgL^（-1） was 1.8%（n=5）.This modified electrode was successfully applied for determination of Cd（Ⅱ） in some water samples.

关键词： Multiwalled carbon nanotube 1-(2-Pyridylazo)-2-naphthol Cadmium(Ⅱ) Stripping voltammetry

Chemical constituents and fumigant toxicity of essential oil from Carum copticum against two stored product beetles

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Insect Science 2007年第3期14卷 213-218页

作者： BIBI ZAHRA SAHAF SAEID MOHARRAMIPOUR mohammad hadi MESHKATALSADAT Department of Entomology College of Agriculture Tarbiat Modares University Tehran Department of Chemistry Faculty of Basic Science Lorestan University Khoramabad Iran

Plant secondary metabolites play an important role in plant-insect interactions and therefore such compounds may have insecticidal or antifeedant activity against insects. Carum copticum C. B. Clarke （Apiaceae） is one of these plants that have medicinal effects on humans. The chemical composition of the essential oil from dry seeds of C. copticum was studied by gas chromatography （GC） and gas chromatography mass spectrometry （GC-MS）. Thymol （41.34%）,α-terpinolene （17.46%） and ρ-cymene （11.76%） were found to be the major constituents of the oil. In fumigant toxicity tests with the essential oil against adults of Sitophilus oryzae （L.） and Tribolium castaneum （Herbst） at 27 ±1℃ and 60% ± 5% RH, it was observed that S. oryzae （LC50 = 0.91 μL/L） were significantly susceptible than T. castaneum （LC50 = 33.14 μL/L）. The mortalities of the insect species reached 100% at concentrations higher than 185.2 μL/L and 12-h exposure time. The findings indicate the strong insecticidal activity of C. copticum oil and its potential role as a fumigant for storedproduct insects.

关键词： Carum copticum essential oil fumigant toxicity Sitophilus oryzae Tribolium castaneum

Cracks coalescence mechanism and cracks propagation paths in rock-like specimens containing pre-existing random cracks under compression

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Journal of Central South University 2014年第6期21卷 2404-2414页

作者： hadi Haeri Kourosh Shahriar mohammad Fatehi Marji Parviz Moarefvand Department of Mining Engineering Science and Research BranchIslamic Azad University Department of Mining and Metallurgical Engineering Amirkabir University of Technology Mine Exploitation Engineering Department Faculty of Mining and MetallurgyInstitution of EngineeringYazd University

The mechanism of cracks propagation and cracks coalescence due to compressive loading of the brittle substances containing pre-existing cracks(flaws)was modeled experimentally using specially made rock-like specimens from Portland Pozzolana Cement(PPC).The breakage process of the specimens was studied by inserting single and double flaws with different inclination angles at the center and applying uniaxial compressive stress at both ends of the *** first crack was oriented at 50° from the horizontal direction and kept constant throughout the analysis while the orientation of the second crack was *** is experimentally observed that the wing cracks are produced at the first stage of loading and start their propagation toward the direction of uniaxial compressive *** secondary cracks may also be produced in form of quasi-coplanar and/or oblique cracks in a stable *** secondary cracks may eventually continue their propagation in the direction of maximum principle *** experimental works were also simulated numerically by a modified higher order displacement discontinuity method and the cracks propagation and cracks coalescence were studied based on Mode I and Mode II stress intensity factors(SIFs).It is concluded that the wing cracks initiation stresses for the specimens change from 11.3 to 14.1 MPa in the case of numerical simulations and from 7.3 to 13.8 MPa in the case of experimental *** is observed that cracks coalescence stresses change from 21.8 to 25.3 MPa and from 19.5 to 21.8 MPa in the numerical and experimental analyses,*** some of the numerical and experimental results with those recently cited in the literature validates the results obtained by the proposed ***,a numerical simulation was accomplished to study the effect of confining pressure on the crack propagation process,showing that the SIFs increase and the crack initiation angles change in this case.

关键词：裂纹扩展传播路径压缩载荷机制标本聚结数值模拟岩样

Experimental and Numerical Study of Shear Fracture in Brittle Materials with Interference of Initial Double Cracks

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Acta Mechanica Solida Sinica 2016年第5期29卷 555-566页

作者： hadi Haeri Vahab Sarfarazi mohammad Fatehi Marji Ahmadreza Hedayat Zheming Zhu Young Researchers and Elite Club Bafgh BranchIslamic Azad UniversityBafghIran Department of Mining Engineering Hamedan University of TechnologytiamedanIran Associate Prof. Head of Mine Exploitation Engineering DepartmentFaculty of Mining and MetallurgyInstitution of EngineeringYazd UniversityYazdIvan Department of Civil and Environmental Engineering Colorado School of MinesGoldenColorado 80401USA College of Architecture and Environment Sichuan UniversityChengdu 610065China

A simultaneous experimental and numerical study of shear fracture of concrete-like materials is carried out using Brazilian disc specimens with initial double edge cracks and fourpoint bending beam specimens with double *** interference effects of two cracks/notches are investigated through varied ligament angles and crack *** is shown that shear fracturing paths change remarkably with the initial ligament angles and crack *** cracked specimens are numerically simulated by an indirect boundary element method.A comparison between the numerical results and the experimental ones shows good agreement.

关键词： cracked Fracture overlapped fracturing ligament simultaneous discontinuity cracking specimen shrinkage

Synthesis and Characterization of Nano-sized Zinc Oxide Coating on Cellulosic Fibers： Photoactivity and Flame-retardancy Study

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Chinese Journal of Chemistry 2011年第6期29卷 1239-1245页

作者： Fallah, Moafi hadi Fallah, Shojaie Abdollah Zanianchi, mohammad Ali Department of Chemistry Faculty of Science University of Guilan P.O. Box 1914 Rasht Iran

We have investigated the effect of zinc oxide as a photocatalyst and durable flame-retardant on cellulosic fibers. Zinc oxide nanocrystals were successfully synthesized and deposited onto cellulosic fibers using sol-gel process at low temperature. The samples were characterized by means of several techniques such as scanning electron microscopy, transmission electron microscopy, diffuse reflectance spectroscopy, X-ray diffraction and thermogra- vimetric analysis. The photocatalytic activity was tested by measuring the photodegradation of methylene blue under UV-Vis illumination. Moreover, flame-retardancy was tested by vertical flame spread test. The optimum add-on value for donating flame-retardancy onto cellulosic fabric was obtained to be in the range of 15.24 to 23.20 g of the ZnO per 100 g of fabric. Thermogravimetric analysis of pure and flame-retarded samples were accomplished and discussed. The results obtained are in agreement with Wall effect theory and Coating theory. The originality of this work on introducing photoactive flame-retarded fibers is highly valuable for industrial implementation.

关键词： cellulosic fiber flame-retardancy photocatalytic self-cleaning zinc oxide coating nanoparticle sol-gel processes

Influence of initial microstructure and grain size on transformation of bainite to austenite in large size forgings

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Journal of Iron and Steel Research(International) 2018年第5期25卷 554-562页

作者： Emna Ben Fredj hadi Ghasemi Nanesa mohammad Jahazi Jean-Benoit Morin Department of Mechanical Engineering Ecole deTechnologie Superieure Montreal QC H3C 1K3 Canada Finkl Steel-Sorel St-Joseph-de-Sorel QC J3R 3M8 Canada

The kinetics of austenite formation in the surface and center regions of a 40 t forged ingot of a high-strength medium- carbon low-alloy steel was studied using high-resolution dilatometry. The starting microstructures from the surface or center regions had different proportions of bainite and residual austenite as well as different prior austenite grain sizes. Two heating rates representing the actual heating rates in the surface （5℃ s -1） and center regions （0.5℃ s -1） of large size forged blocks were utilized. Dilatometric curves revealed only one transformation step of austenite formation at both heating rates independent of grain size or proportion of phases. Optical microscopy, field emission gun scanning electron microscopy and X-ray diffraction were used to study microstructure evolution and confirm the results obtained by dilatometry. The kinetic parameters for austenite formation were determined from the dilatometry data by Johnson-Mehl- Avrami-Kolmogorov （JMAK） equation. The JMAK coefficients were determined for each condition of the investigated steels. The calculations indicated that the nucleation and growth of austenite in the surface region were accelerated more than 10,000 times due to a significantly smaller average prior austenite grain size, stability of initial retained austenite, and accumulation of coarse carbides at the surface. The results were discussed in the framework of classical nucleation and growth theories using the kinetic parameters for austenite formation.

关键词： Large size ingot Medium-carbon low-alloy steel Initial microstructure Grain size Austenite formation

Investigating the potential of using acoustic frequency on the degradation of linear alkylbenzen sulfonates from aqueous solution

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第9期8卷 1462-1468页

作者： DEHGHANI mohammad hadi MAHVI Amir Hossein NAJAFPOOR Ali Asghar AZAM Kamal Department of Environmental Health Engineering School of Public HealthCenter for Environmental ResearchMedical Sciences/University of TehranTehranI.R. Iran Department of Environmental Health School of Public HealthMashhad University of Medical SciencesMashhadI.R. Iran Department of Epidemiology and Biostatistics School of Public HealthMedical Sciences/University of TehranTehranI.R. Iran

The effectiveness of using acoustical (sonochemical) reactor for degradation of linear alkylbenzen sulfonate (LAS) from aqueous solution was investigated. LASs are anionic surfactants,found in relatively high amounts in domestic and industrial wastewaters. In this study,experiments on LAS solution were performed using methylene blue active substances (MBAS) method. The effectiveness of acoustical processor reactor for LAS degradation is evaluated with emphasis on the effect of treatment time and initial LAS concentration. Experiments were performed at initial concentrations of 0.2,0.5,0.8 and 1.0 mg/L,acoustic fre-quency of 130 kHz,applied power of 500 W and temperature of 18 °C～20 °C. At the conditions involved,LAS degradation was found to increase with increasing sonochemical time. In addition,as the concentration increased,the LAS degradation rate de-creased in the acoustical processor reactor.

关键词：声学电抗器烷基苯磺酸盐声学频率电压声化学