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Genetic analysis of polymerase complex(PA,PB1 and PB2) genes of H9N2 avian influenza viruses from Iran(1999 to 2009)

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Asian Pacific Journal of Tropical Biomedicine 2012年第11期2卷 858-862页

作者： Masoud Soltanialvar reza goodarzi Farshad Akbarnejad Department of Avian Diseases Faculty of AgricultureIslamic Azad University Department of Avian Pathology Islamic Azad University

Objective:To determine the molecular characterization of Polymerase complex(PA,PB1 and PB2) genes of H9N2 avian influenza viruses and the genetic relalionsliip of Iranian H9N2 viruses and other Asian ***:The Polymerase complex(PA,PBl and PB2) genes from seven isolates of H9N2 viruses isolated from commercial chickens in Iran during 2008-2009 were amplified(by RT-PCR method) and *** sequences(Open Reading Frame: orf) of the PA,PBl and PB2 genes were used for phylogenetic tree ***:Most PB2 and PA genes of the H9N2 viruses isolated in 2008-2009 belonged to the unknown avian sublineage which grouped with the 2004 Pakistani H7N3 *** PBl genes of Iranian viruses indicated greater genetic diversity and shared a high level of similarity to PBl genes from either HS or H7 subtypes with compared to established H9N2 Eurasian ***:Our findings demonstrated that the H9N2 viruses in Iran exhibit striking reassortment which has led to the generation of new genotypes.

关键词： Genetic analysis Polymerase complex Avian influenza Iran

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Influence of shielding gas on the mechanical and metallurgical properties of DP-GMA-welded 5083-H321 aluminum alloy

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International Journal of Minerals,Metallurgy and Materials 2016年第12期23卷 1416-1426页

作者： Amin reza Koushki Massoud goodarzi Moslem Paidar Department of Metallurgy and Materials Engineering Iran University of Science and technology Department of Materials Engineering South Tehran Branch Islamic Azad University

In the present research, 6-mm-thick 5083-H321 aluminum alloy was joined by the double-pulsed gas metal arc welding （DP-GMAW） process. The objective was to investigate the influence of the shielding gas composition on the microstructure and properties of GMA welds. A macrostructural study indicated that the addition of nitrogen and oxygen to the argon shielding gas resulted in better weld penetration. Furthermore, the tensile strength and bending strength of the welds were improved when oxygen and nitrogen （at concentrations as high as approximately 0. 1vol%） were added to the shielding gas; however, these properties were adversely affected when the oxygen and nitrogen contents were increased further. This behavior was attributed to the formation of excessive brown and black oxide films on the bead surface, the formation of intermetallic compounds in the weld metal, and the formation of thicker oxide layers on the bead surface with increasing nitrogen and oxygen contents in the argon-based shielding gas. Analysis by energy-dispersive X-ray spectroscopy revealed that most of these compounds are nitrides or oxides.

关键词： aluminum alloys gas metal arc welding shielding gas mechanical properties metallurgical properties

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Nanocrystalline Growth Activation Energy of Zirconia Polymorphs Synthesized by Mechanochemical Technique

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Journal of Materials Science & Technology 2014年第4期30卷 387-393页

作者： Taghi Dallali Isfahani Jafar Javadpour Alireza Khav Massoud goodarzi Hamid reza rezaie Department of Materials Science and Engineering Golpayegan University of Technology School of Metallurgy and Materials Engineering Iran University of Science and Technology(IUST)

The synthesis of ZrO2 by mechanochemical reaction using ZrCI4 and CaO as raw materials and subsequent annealing of the products were investigated. The effect of thermal treatment on the structural evolution and morphological characteristics of the nanopowders was studied by X-ray diffractometry, Raman spectroscopy, transmission electron microscopy, scanning electron microscopy, differential thermal analysis and Rietveld refinement. The results showed that the average crystallite size of Zr02 was less than 100 nm up to around 1100 ℃. The activation energy for ZrO2 nanocrystallite growth during calcination was calculated to be about 13,715 and 27,333 J/too Mechanism of the nanocrysta for tetragonal （t-ZrO2） and monoclinic （m-Zr02） polymorphs, respectively. ite growth of the ZrO2 polymorphs during annealing is primarily investigated.

关键词： Zirconia nanoparticles Mechanochemical synthesis Characterization methods Activation energy Phase transformation

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Assessment of the Vulnerability of Riverine Cities and Their Coping Capacity against Floods (Case Study: Ahvaz Metropolis)

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Chinese Journal of Urban and Environmental Studies 2023年第3期11卷 117-148页

作者： Majid goodarzi Zahra SOLTANI reza Nazarpour DEZAKI Department of Geography and Urban Planning Shahid Chamran University of Ahvaz

Based on global statistics, floods rank the first among natural disasters that severely disrupt human life, property, and the environment. Iran, as one of the flood-prone countries, is located in southwestern Asia. The geographical elevation, maritime influences, seasonal winds, and proximity to mountain ranges or deserts play a significant role in its daily and seasonal temperature fluctuations, as well as its precipitation patterns and types. According to official statistics in Iran,among climate-related hazards, some 70% of the annual funds of the Plan for Reducing the Effects of Natural Disasters have been spent on compensation for damages from floods. Yet, what augments the importance of floods and their damages is the fact that human and urban centers have been located in flood-prone areas. Therefore, considering the dense populations and financial capitals in such areas, it is necessary to assess the vulnerability of urban floods, especially in big cities like Ahvaz. This metropolis, as the capital of Khuzestan province, is located in the marshy plains with a population of over one million people. It is traversed by the country’s most water-rich river, the Karun. The aim of this study is to assess the vulnerability of Ahvaz from flood as a natural hazard and its coping capacity. The methodology of the study is descriptiveanalytical and is based on its practical purpose. Fuzzy Hierarchy Model(Fuzzy Analytic Hierarchy Process) has been used for the spatial analysis of vulnerability and the capacity to deal with floods. In summary, the findings are as follows:(a) Considering the floods that have occurred in the past six decades and comparing the affected areas with the results of this research in terms of highly vulnerable areas in the central part of the city, the model used has shown high efficiency in determining the vulnerability caused by urban flooding.(b) As far as vulnerability is concerned,location and physical–environmental conditions stimulate and rei

关键词： Vulnerability coping capacity urban flood riverine city

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Astrodaucus persicus as a new source of bioinsectisides against malaria vector, Anopheles stephensi

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Asian Pacific Journal of Tropical Medicine 2017年第9期10卷 896-899页

作者： Saied goodarzi Hassan Vatandoost Mohammad reza Abai Saeed Tavakoli Amir Hatamian Yousef Ajani Abbas Hadjiakhoondi Narguess Yassa Zahra Tofighi Medicinal Plants Research Center Faculty of Pharmacy Tehran University of Medical Sciences Department of Medical Entomology and Vector Control School of Public Health Tehran University of Medical Sciences Department of Pharmacognosy Faculty of Pharmacy Tehran University of Medical Sciences

Objective: To determine the larvicidal activities of petroleum ether, chloroform, ethyl acetate and methanol fractions of roots and fruits extracts of Astrodaucus persicus from Apiaceae family against malaria vector, Anopheles stephensi(An. stephensi).Methods: Twenty five third instar larvae of An. stephensi were exposed to various concentrations(10–160 g/L) of fractions and were assayed according to World Health Organization protocol. The larval mortality was calculated after 24 h ***: Among tested fractions, the highest larvicidal efficacy was observed from ethyl acetate fraction of fruits extract with 50% and 90% mortality values(LC_(50) and LC_(90)) of34.49 g/L and 108.61 g/L, respectively. Chloroform fraction of fruits extract was the second larvicidal sample with LC_(50) of 45.11 g/L and LC_(90) of 139.36 g/L. Petroleum ether fractions of fruits and roots and methanol fraction of fruits showed moderate toxicity against An. ***: Astrodaucus persicus is a potential source of valuable and natural larvicidal compounds against malaria vector, An. stephensi and can be used in mosquitoes control programs as an alternative to synthetic insecticides.

关键词： Astrodaucus persicus Malaria vector Mosquitoes control Bioinsecticide Anopheles stephensi larvae

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