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Teflon-pad shaping process of circular metal blanks into quasi-cup specimens by theoretical and experimental methods

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Transactions of Nonferrous Metals Society of China 2016年第1期26卷 213-227页

作者： Abbas NIKNEJAD iman karami fath Mechanical Engineering Department Yasouj University

Teflon-pad shaping process of circular metal blanks into quasi-cup specimens is investigated by theoretical and experimental methods in the quasi-static condition. In the experiments, circular metal sheets are formed into the quasi-cup samples by compressing them between a Teflon-filled die and a rigid punch with desirable shape. To investigate influences of different parameters on the forming progress, 12 rigid punches with different dimensions, two blank material types of aluminum and galvanized iron, three blank thicknesses of 0.6, 1.1 and 1.5 mm, and two Teflon-fillers of PVC and polyurethane are used in several experimental tests. In the analytical part, theoretical deformation models of metal blank and Teflon-filler are introduced and based on energy method, energy absorptions by the blank and Teflon-filler are calculated to derive a theoretical formula for predicting total required energy of the forming process. For this purpose, several energy absorption mechanisms are considered in the blank and filler. Furthermore, predictions by theoretical equation are compared with the corresponding experimental tests to study the verity of the calculated formulas. Theoretical and experimental results illustrate change trend of forming energy with respect to blank thickness. Also, the performed forming tests show that when external cone angle of rigid punch with respect to the horizontal direction increases, forming energy increases nonlinearly; and when the depth of spherical part of rigid punch increases, the probability of rupture increases. Additionally, the experiments demonstrate that there is a direct relationship between the forming energy and flow stress of the blanks. Furthermore, experimental observations illustrate that forming energy of a certain blank with PVC Teflon-filler is higher than that of a similar specimen with polyurethane Teflon-filler; but, the probability of wrinkling decreases when PVC Teflon-pad is used as the filler; and it is advantage of

关键词： Teflon-pad forming circular metal blank quasi-cup specimen PVC Teflon-filler polyurethane Teflon-filler forming energy

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An environmentally friendly synthesis of 1,4-dihydropyrano[2,3-c]pyrazole derivatives catalyzed by tungstate sulfuric acid

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Chinese Chemical Letters 2014年第12期25卷 1580-1582页

作者： Mahnaz Farahi Bahador karami iman Sedighimehr Hamideh Mohamadi Tanuraghaj Department of Chemistry Yasouj UniversityYasouj 75918-74831Iran

An efficient three-component synthesis of 6-amino-4-aryl-5-cyano-3-metriyl-1-phenyl-1,4-dihydropyrano[2,3-c]pyrazoles via a reaction between 3-methyl-1-phenyl-2-pyrazolin-5-one,aromatic aldehydes and malononitrile using tungstate sulfuric acid as a catalyst was *** conditions,good to excellent yields,easily available catalyst and easy work-up are the key features of this method.

关键词： 6-Amino-4-aryl-5-cyano-3-methyl-1phenyl-1 4-dihydropyrano[2.3-c]pyrazoles 3-Methyl-1-phenyl-2-pyrazolin-5-one Aromatic aldehyde Malononitrile Tungstate sulfuric acid

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Design of a multiplex PCR method for detection of toxigenicpathogenic in Vibrio cholerae

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Asian Pacific Journal of Tropical Medicine 2013年第2期6卷 115-118页

作者： Abbas Ali imani Fooladi iman Islamieh D Hosseini Doust R karami A Marashi SM Applied Microbiology Research Center Baqiyatallah University of Medical SciencesTehranIran Department of Microbiology Faculty of Advance Sciences and TechnologyIslamic Azad University-Pharmaceutical Sciences BranchTehranIran Molecular Biology Research Center Baqiyatallah University of Medical SciencesTehranIran Department of Microbiology and Immunology Babol University of Medical SciencesBabolIran

Objective:To study virulence and regulatory genes(hlyA,ctxB,tcpI) in clinical strains of Vibrio ckolerae(***),***:Three important genes,tepI,hlyA and ctxB were used for detection of toxigenic and pathogenic *** by chain reaction assay method. Results:According to the results of the PCR,the incidence of hlyA,tcpI,and ctxB genes in clinical isolates was obtained as 94.7%(72 sample),90.8%(69 sample),and 92.1%(70 sample), *** strains possessed all genes except ctxB,six strains possessed all genes except tcpI,four strains possessed all genes except hlyA,one strain possessed only hlyA and 60 strains contained a combination of three *** hlyA,ctxB and tcpI,Conclusions:Result show that this method could be reliable to detect toxigenic-pathogenic strains of *** in Iran.

关键词： Vibrio cholerae Multiplex PCR Rapid detection

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A comprehensive overview on sandfly fever

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Journal of Acute Disease 2021年第3期10卷 98-106页

作者： Rouhullah Dehghani Hamid Kassiri iman Khodkar Saina karami Social Determinants of Health Research Center and Department of Environment HealthKashan University of Medical SciencesKashanIran Department of Medical Entomology Faculty of HealthAhvaz Jundishapur University of Medical SciencesAhvazIran Student Research Committee Ahvaz Jundishapur University of Medical SciencesAhvazIran

Sandfly fever is a febrile emerging arboviral illness which is a huge threat posed to public *** fever viruses(Sicilian,Naples,and Toscana)are endemic to the Mediterranean *** suggests an increase in the activity of sandfly-borne phleboviruses and their extension to other *** infection is relatively benign but may cause severe clinical manifestations and *** fever viruses belongs to the genus Phlebovirus(family Bunyaviridae),and the four main serotypes include sandfly fever Sicilian virus,sandfly fever Naples virus,sandfly fever Cyprus virus,and Toscana *** fever has flu-like symptoms such as fever,headache,photophobia,malaise,myalgia,and retro-orbital *** incubation period of the disease is 4-8 days,and the patient usually recovers within a *** first infection provides the host with *** fever viruses are transmitted through the bites of infected female sandflies,thus,the epidemiology of sandfly fever is closely related to the presence and activity of sandfly species that act as the vectors for *** and outbreaks of the disease have been reported worldwide for more than 100 *** in all,this disease is important for non-endemic countries because it is a travel-related and/or imported illness.

关键词： Sandfly fever Phlebovirus Global distribution Epidemiology Iran

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