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Geochemistry of Host and Altered Rocks in the Nahran Area, Tarom Zone (NW Iran): Implication for Determining of Mineralization Processes in the Alteration Environment

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Open Journal of Geology 2017年第3期7卷 374-394页

作者： Nasrin Bayrami Tosanloo Hamid reza Peyrowan Seyed Jamal Sheikhzakariee ali reza jafari rad Department of Geology Science and Research Branch Islamic Azad University Tehran Iran Soil Conservation and Watershed Management Research Institute Tehran Iran

The Nahran area is located in the Northeast of Zanjan in the Northwest of Iran. This area with 20,000 km2 is part of the Tarom volcanic-plutonic zone which lies between the longitudes 49°7'7.8"E and 36°41'25.74"E near to the Nahran village. The Nahran altered zone is part of large-scale syncline, which is oriented from Sirdan to Altinkosh with an axial length of 9 km. A systematic study of petrographical and geochemical data of Nahran samples reveals they are andesite, trachyandesite to dacite composition and have metaluminous to peraluminous and calc-alkaline affinity. Four alteration zones of propylitic, medium and advanced argillic and silicific zones could be identified in the area. According to our finding, combination of both supergene and hypogene process has an effective role in the development of alteration in the Nahran alteration zone.

关键词： Tarom Nahran Alteration Hypogene Supergene

Effect of Multi-Step Tempering on Retained Austenite and Mechanical Properties of Low Alloy Steel

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Journal of Iron and Steel Research International 2011年第12期18卷 49-56页

作者： Hamid reza Bakhsheshi-rad Ahmad Monshi Hossain Monajatizadeh Mohd Hasbullah Idris Mohammed Rafiq Abdul Kadir Hassan jafari Materials Engineering Department Islamic Azad University Materials Engineering Department Faculty of Mechanical EngineeringUniversity Technology Malaysia Materials Engineering Department Faculty of Mechanical EngineeringShahid Rajaee Teacher Training University

The effect of multi-step tempering on retained austenite content and mechanical properties of low alloy steel used in the forged cold back-up roll was *** evolutions were characterized by optical microscope,X-ray diffraction,scanning electron microscope and Feritscope,while the mechanical properties were determined by hardness and tensile *** results revealed that the content of retained austenite decreased by about 2% after multi-step ***,the content of retained austenite increased from 3.6% to 5.1% by increasing multi-step tempering *** hardness and tensile strength increased as the austenitization temperature changed from 800 to 920 ℃,while above 920 ℃,hardness and tensile strength *** addition,the maximum values of hardness,ultimate and yield strength were obtained via triple tempering at 520 ℃,while beyond 520 ℃,the hardness,ultimate and yield strength decreased sharply.

关键词： cold back-up roll retained austenite mechanical property austenite grain size

Microstructure,mechanical properties and corrosion behavior of Al-Si-Cu-Zn-X(X=Bi,Sb,Sr) die cast alloy

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Transactions of Nonferrous Metals Society of China 2016年第1期26卷 28-38页

作者： Saeed FARAHANY ali OURDJ1NI Hamid reza BAKHSHESHI-rad Department of Materials and Mechanical Engineering Buein Zahra Technical UniversityQazvin 345 1745346Iran Department of Mechanical Engineering Faculty of EngineeringUniversity of OttawaOttawa161 Louis PasteurKIN 6N5Canada Department of Materials Manufacturing and Industrial EngineeringFaculty of Mechanical EngineeringUniversiti Teknologi Malaysia(UTM)Johor Bahru 81310Malaysia

The microstructure evolution, mechanical and corrosion properties of Al-11Si-2Cu-0.8Zn die cast alloy treated with Bi, Sb and Sr additions were investigated. The results of mechanical testing showed that all additions increased impact toughness, ultimate tensile strength, and elongation of the alloy as a result of change in eutectic Si morphology. The analysis of fracture surfaces revealed that with addition of Sr and to lesser extent Bi and Sb, the alloy exhibited a predominantly ductile fracture rather than quasi-cleavage brittle fracture. Moreover, with the additions of Sr, Bi and Sb, the quality index increased to 164.7 MPa, 156.3 MPa and 152.6 MPa respectively from 102 MPa for the base alloy. Polarization corrosion tests conducted in sodium chloride solution showed that the corrosion potential shifted to more negative values with additions of Sb, Bi and Sr, respectively. Corrosion immersion tests also revealed that the element additions have a detrimental effect on the corrosion rate of alloys, due to the increase of boundaries between the Al and eutectic Si phases.

关键词： aluminium die cast alloy melt treatment mechanical properties fracture corrosion

Iran supports a great share of biodiversity and floristic endemism for Fritillaria spp.(Liliaceae)：A review

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Plant Diversity 2017年第5期39卷 245-262页

作者： Mahmoud Kiani Shirin Mohammadi alireza Babaei Fatemeh Sefidkon Mohamad reza Naghavi Mojtaba Ranjbar Seyed ali Razavi Keramatollah Saeidi Hadi jafari Davoud Asgari Daniel Potter Department of Biotechnology & Medicinal Plants Amol University of Special Modem Technologies Amol Iran Department of Horticultural Science Shiraz University Shiraz lran Department of Horticultural Sdence Tarbiat Modares Umverslty lenran lrand Research Institute of Forests and Rangelands Tehran lrane Department of Agronomy and Plant Breeding Faculty of Agriculture University of Tehran Karaj lran Department of Horticulture Faculty of Agriculture Shahre Kord University Shahre Kord lrang Department of Physiology & Breeding of Ornamental Plants Engineering Faculty of Horticulture Sciences University of Tehran Karaj Iranh Department of Plant Sciences University of California-Davis Davis USA

Iran supports a great share of exotic and/or endemic plant genera and species. The genus Fritillaria(Liliaceae) is a precious part of this botanical richness with 19 species, of which 10 are endemic to the country. However, signs are mounting that the country is truly at a crossroads when it comes to preservation of this national wealth. In this regard, an effective conservation strategy should thoroughly consider the classification of Fritillaria, as conservation practices are compromised by knowledge gaps in systematics and taxonomy. As published studies on Fritillaria in Iran have been sporadic and limited in scope, the aim of this review is to provide information necessary to help bridge these information *** objective is to facilitate increased understanding of the geographic, taxonomic, cytogenetic and phylogenetic status of Iranian Fritilloria, which is vital to meeting the goal of sustainable conservation of the genus in Iran and neighboring areas.

关键词： Conservation Ecosystem Endemic Phylogenetic Middle East Taxonomy

Antioxidant properties and inhibitory effects of Satureja khozestanica essential oil on LDL oxidation induced-CuSO_4 in vitro

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Asian Pacific Journal of Tropical Biomedicine 2013年第1期3卷 22-27页

作者： Shahrokh Bagheri Hassan Ahmadvand ali Khosrowbeygi Farshid Ghazanfari Narges jafari Habibolah Nazem reza Haji Hosseini Department of Biochemistry Lorestan University of Medical Sciences Razi Herbal Medicine Research Center Lorestan University of Medical Sciences Isfahan Cardiovascular Research Center Isfahan University of Medical Sciences Department Biology and Biochemistry Payame Noor University

Objective:To assess various antioxidative activities of Satureja khozestanica essential oil(SKE)and its effect on oxidation of low density lipoprotein(LDL)induced by CuSO_4 in vitro by monitoring the formation of conjugated dienes and malondialdehyde(MDA).Methods:The formation of conjugated dienes,lag time and MDA were *** of this Cu-induced oxidation was studied in the presence of several concentrations of *** total antioxidant activity and free radical scavenging of SKE were ***:It was demonstrated that SKE was able to inhibit LDL oxidation and decrease the resistance of LDL against *** inhibitory effects of SKE on LDL oxidation were dose-dependent at concentrations ranging from 50 to 200μg/*** antioxidant capacity of SKE was(3.20±0.40)nmol of ascorbic acid equivalents/g *** SKE showed remarkable scavenging activity on 2,2-diphenyl-picrylhydrazyl,IC_(50)(5.30±0.11)ng/***:This study shows that SKE is a source of potent antioxidants and prevents the oxidation of LDL in vitro and it may be suitable for use in food and pharmaceutical applications.

关键词： Antioxidant properties Satureja khozestanica Essential oil Low density lipoprotein Oxidation

Synthesis and in-vitro characterization of biodegradable porous magnesium-based scaffolds containing silver for bone tissue engineering

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Transactions of Nonferrous Metals Society of China 2019年第5期29卷 984-996页

作者： Hamid reza BAKHSHESHI-rad Ehsan DAYAGHI Ahmad Fauzi ISMAIL Madzlan AZIZ ali AKHAVAN-FARID Xiongbiao CHEN Advanced Materials Research Center Department of Materials Engineering Najafabad Branch Islamic Azad University Advanced Membrane Technology Research Center (AMTEC) Universiti Teknologi Malaysia Department of Mechanical Engineering College of Engineering University of Saskatchewan Department of Mechanical Materials and Manufacturing Engineering University of Nottingham Malaysia Campus Division of Biomedical Engineering College of Engineering University of Saskatchewan

Infection is a major potential complication in the clinical treatment of bone injuries. Magnesium (Mg)-based composites are biodegradable and antibacterial biomaterials that have been employed to reduce infection following surgical implants. The aim of present study was to synthesize and in-vitro characterize Mg-based scaffolds containing silver for bone tissue engineering. Porous Mg-based scaffolds with four silver concentrations (i.e., 0, 0.5 wt.%, 1 wt.%, and 2 wt.%), denoted by Mg?Ca?Mn-Zn-xAg (MCMZ?xAg)(where x is the silver concentration), were fabricated by the space holder technique. The effects of silver concentration on pore architecture, mechanical properties, bioactivity, and zone of bacterial inhibition were investigated in-vitro. X-ray diffractometry (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and fluorescence microscopy were utilized to characterize the obtained scaffolds. In-vitro corrosion test results indicated that the MCMZ scaffolds with lower silver content were more resistant to corrosion than those enriched with higher amounts of silver. Examination of the antibacterial activity showed that the MCMZ?Ag scaffolds exhibited superb potential with respect to suppressing the growth of Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus), in the inhibition zone around the MCMZ?Ag scaffolds, with increasing in the amount of incorporated silver;however, higher amounts of silver increased the cytotoxicity. Taken together, the results of this study demonstrate that the porous 0.5 wt.% Ag-containing scaffolds with interconnected pores, adequate mechanical properties, antibacterial activity, and cell adhesion are promising with respect to the repair and substitution of damaged and diseased bones.

关键词： Mg-based scaffold biocompatibility antibacterial activities bioactivity corrosion behavior

Petrology of Intrusive Bodies of Azizabad-Tinamo Area in the South of Songour, Iran

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Open Journal of Geology 2016年第12期6卷 1567-1579页

作者： Siavash Gholizadeh Mohammad-ali Arian Mahammad-reza jafari Abdollah Yazdi Department of Geology Faculty of Sciences North Tehran Branch Islamic Azad University Tehran Iran Department of Geology Kahnooj Branch Islamic Azad University Kerman Iran

In terms of structural divisions of the Iran’s earth crust, the studied area is considered as a part of the Sanandaj-Sirjan structural zone and Zagros Thrust. In this area, there are two gabbroic-dioritic and syenitic igneous intrusive bodies. The host rocks of these intrusive bodies are upper Cretaceous limestones and formed by contactmetamorphism at the contact zone between hornfels rocks and skarn. Field and geochemical datasets represent that all various rocks within these intrusive bodies have been originated from the same magma. The process of fractional crystallization and probably a small amount of contamination and assimilation has also played a role in the evolution of parent magma. Generally, these magmas are sub-alkaline and lie in themagmatic range of tholeiitic and calc-alkaline series. Samples investigated are metaluminous and peralkaline.

关键词： Syeniteintrusive Bodies Gabbro-Diorite and Granite Sub-Alkaline Metaluminous

The global,prevalence,and risk factors of postoperative fever after percutaneous nephrolithotomy:A systematic review and meta-analysis

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Asian Journal of Urology 2024年第2期11卷 253-260页

作者： reza Falahatkar Siavash Falahatkar Mohammad Amin Khajavi Gaskarei Masoomeh Afzalipoor ali Mojtahedi Neda aligolighasemabadi Ahmad Deilami Samaneh Mirzaei Dahka Mohammad-Hossein Keivanlou alireza jafari Urology Research Center Guilan University of Medical SciencesGuilanRashtIran Department of Surgery University of SaskatchewanSaskatoonCanada Microbiology Department School of MedicineGuilan University of Medical SciencesRashtIran Department of Internal Medicine School of MedicineGuilan University of Medical SiencesRashtIran School of Nursing and Midwifery Guilan University of Medical SciencesGuilanRashtIran

Objective:This study aimed to explore the global,prevalence,and risk factors of fever after percutaneous nephrolithotomy(PCNL)by conducting a systematic review and ***:The high-sensitivity searching was conducted without time limitation until December 30,2020 in Web of Sciences,Scopus,and PubMed based on inclusion and exclusion ***:The prevalence rates of fever and sepsis among patient undergoing PCNL were estimated 9.5%(95%confidence interval[CI]:9.3%-9.7%),and 4.5%(95%CI:4.2%-4.8%),*** tube was used in 9.96%(95%CI:9.94%-9.97%)of *** mean preoperative white blood cells of patients were 6.401×109/L;18.3%and 4.55%of patients were considered as the positive urinary culture and pyuria,*** 20.4%of patients suffered from residual *** odds ratios(ORs)of fever in patients who suffering from diabetes mellitus,hydronephrosis,staghorn stones,and blood transfusion were 4.62(95%CI:2.95-7.26),1.04(95%CI:0.81-1.34),2.57(95%CI:0.93-7.11),and 2.65(95%CI:1.62-4.35),*** who underwent PCNL in prone position were more likely to develop fever(OR:1.23;95%CI:0.75-2.00)than patients in supine ***:The current study showed that patients who suffer from diabetes mellitus,hydronephrosis,staghorn stones,nephrostomy tube or double-J stent,blood transfusion,and also patients who underwent PCNL in prone position surgery are more likely to develop a postoperative fever after PCNL.

关键词： Percutaneous nephrolithotomy Fever Hydronephrosis Diabetes Meta-analysis

Genetic Diversity and Relationships among Diploid and Tetraploid Cotton Using RAPD Markers

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棉花学报 2008年第S1期20卷 78-页

作者： MOGHADDAM Mohammad reza Ramazani MAJIDI Eslam MOFIDABADI ali jafari Cotton Research Station of Kashmar PO Box 398 Kashmar Khorasan-e-Razavi Iran ABRII of Iran Karaj Cotton Research Institute of Iran

Gossypium species(+49) represent a vast resource of genetic diversity for improvement of cultivated *** determine intra-and inter-specific genetic diversity and relationships,we

关键词： DNA fingerprinting Gossypium species genetic similarity RAPD