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Diversity of Macrophomina phaseolina Based on Morphological and Genotypic Characteristics in Iran
Mahdizadeh, Valiollah,Safaie, Naser,Goltapeh, Ebrahim Mohammadi The Korean Society of Plant Pathology 2011 Plant Pathology Journal Vol.27 No.2
Fifty two Macrophomina phaseolina isolates were recovered from 24 host plant species through the 14 Iranian provinces. All isolates were confirmed to species using species-specific primers. The colony characteristics of each isolate were recorded, including chlorate phenotype, relative growth rate at $30^{\circ}C$ and $37^{\circ}C$, average size of microsclerotia, and time to microsclerotia formation. The feathery colony phenotype was the most common (63.7%) on the chlorate selective medium and represented the chlorate sensitive phenotype of the Iranian Macrophomina phaseolina population. Meantime, inter simple sequence repeats (ISSR) Markers were used to assess the genetic diversity of the fungus. Unweighted pair-group method using arithmetic means (UPGMA) clustering of data showed that isolates did not clearly differentiate to the specific group according to the host or geographical origins, however, usually the isolates from the same host or the same geographic origin tend to group nearly. Our results did not show a correlation between the genetic diversity based on the ISSR and phenotypic characteristics. Similar to the M. phaseolina populations in the other countries, the Iranian isolates were highly diverse based on the phenotypic and the genotypic characteristics investigated and needs more studies using neutral molecular tools to get a deeper insight into this complex species.
Fatemeh Mahdizadeh,Mohammadreza Eskandarian 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4
Nanoporous SiO2 was synthesized by sol–gel method using dry yeast cells as a template. Additionally, characterization of the biosynthesized nanoporous SiO2 was investigated. Bio-synthesized nanoporous SiO2 has the specific surface area of 460 m2/g and total pore volume of 0.36 cm3/g. Co-immobilization of glucose oxidase and catalase by adsorption method was done on biosynthesized nanoporous SiO2 and immobilized enzymes were used for removal of water dissolved oxygen. Additionally, modeling and optimization for removal of water dissolved oxygen was performed using rotatable response surface methodology (RSM). Experimental values were in good agreement with the predicated ones and the model was highly significant.
Diversity of Macrophomina phaseolina Based on Morphological and Genotypic Characteristics in Iran
Valiollah Mahdizadeh,Naser Safaie,Ebrahim Mohammadi Goltapeh 한국식물병리학회 2011 Plant Pathology Journal Vol.27 No.2
Fifty two Macrophomina phaseolina isolates were recovered from 24 host plant species through the 14Iranian provinces. All isolates were confirmed to species using species-specific primers. The colony characteristics of each isolate were recorded, including chlorate phenotype, relative growth rate at 30°C and 37°C, average size of microsclerotia, and time to microsclerotia formation. The feathery colony phenotype was the most common (63.7%) on the chlorate selective medium and represented the chlorate sensitive phenotype of the Iranian Macrophomina phaseolina population. Meantime,inter simple sequence repeats (ISSR) Markers were used to assess the genetic diversity of the fungus. Unweighted pair-group method using arithmetic means (UPGMA) clustering of data showed that isolates did not clearly differentiate to the specific group according to the host or geographical origins, however, usually the isolates from the same host or the same geographic origin tend to group nearly. Our results did not show a correlation between the genetic diversity based on the ISSR and phenotypic characteristics. Similar to the M. phaseolina populations in the other countries, the Iranian isolates were highly diverse based on the phenotypic and the genotypic characteristics investigated and needs more studies using neutral molecular tools to get a deeper insight into this complex species.
Ali Beheshtipour,Seyed Mostafa Mahdizadeh,Davoud Khademi,Elahe Khodeir,Hamidreza Emamiyan 대한금속·재료학회 2020 METALS AND MATERIALS International Vol.26 No.11
In this research, spark plasma sintering (SPS) was used as a new method in the fabrication of Al–Al2O3 composites. Theeffect of Al2O3particle size (both nano and micron) and its amount on the relative density, hardness, resistance, corrosionand compressive strength in Al–Al2O3 composite were investigated. Evaluation and size characterization of nano particlewas carried out by transmission electron microscope. The distribution of particles throughout sample, as well as the detectionof the elements in the structure were studied by scanning electron microscopy equipped by corresponding energy dispersiveX-ray spectrometer analysis. According to the results, in the sample containing 3 wt% of nanoparticle of Al2O3,the mechanicalproperties of composite and corrosion resistance were improved due to uniform distribution of Al2O3nanoparticles. However, by increasing weight percent or particle size of Al2O3in composite, properties such as corrosion resistance andmechanical strength were considerably reduced. It can be attributed to the porosity and agglomeration of particle that wereproduced in composite.
Buckling of Steel Cylindrical Shells with an Elliptical Cutout
Mahmoud Shariati,Masoud Mahdizadeh Rokhi 한국강구조학회 2010 International Journal of Steel Structures Vol.10 No.2
Numerical simulation and analysis of steel cylindrical shells with various diameter and length having an elliptical cutout,subjected to axial compression were systematically carried out in this paper. The investigation examined the influence of the cutout size, cutout angle and the shell aspect ratios L/D and D/t on the pre-buckling, buckling, and post-buckling responses of the cylindrical shells. For several specimens, an experimental investigation was also carried out via an INSTRON 8802 servo hydraulic machine and the results obtained from the experiments were compared with numerical results. A very good accordance was observed between the results obtained from the finite element simulation and the experiments. Furthermore,some equations in the form of a buckling load reduction factor were developed.
Mohammad Malakootian,Mostafa Pournamdari,Ali Asadipour,Hakimeh Mahdizadeh 한국화학공학회 2019 Korean Journal of Chemical Engineering Vol.36 No.2
p-Nitroaniline (PNA) is a common contaminant in the wastewater of oil refineries, the petrochemical industry and from production of pesticides, dyes and glue. The aim of this research was to determine the extent of degradation and removal of PNA from aqueous solutions by a novel semi-fluid Fe/charcoal reactor, process optimization, determination of the intermediate and final products and the degradation reaction path. The effective factors in the degradation process were contact time, aeration amount, initial PNA concentration, Fe/charcoal ratio, and initial pH of the solution. The intermediate products were determined by GC-MS. The kinetics of the degradation reaction also was determined. PNA removal efficiency in an actual sample from petrochemical industry wastewater was tested under optimal conditions. The maximum removal efficiency under the optimal conditions (pH: 7; contact time 120min; aeration rate 10 L/min; Fe/charcoal ratio: 2/1; initial concentration of PNA: 10mg/L) for the synthetic solution and in actual wastewater samples were 95% and 89%, respectively. In addition, the system stability was investigated in ten consecutive cycles of the electrode reuse. The removal efficiency decreased as low as 5%, which indicates the high stability of the system. The degradation process was determined to follow pseudo-first kinetics and the Langmuir-Hinshelwood model. Fe/charcoal micro-electrolysis is a relatively highly efficient system for removing PNA from wastewater and is suggested for this purpose.
Portland cement structure and its major oxides and fineness
Nosrati, A.,Zandi, Y.,Shariati, M.,Khademi, K.,Aliabad, M. Darvishnezhad,Marto, A.,Mu'azu, M.A.,Ghanbari, E.,Mahdizadeh, M.B.,Shariati, A.,Khorami, M. 국제구조공학회 2018 Smart Structures and Systems, An International Jou Vol.22 No.4
Predicting the compressive strength of concrete has been considered as the initial phase across the cement production processing. The current study has focused on the integration of the concrete compressive strength in 28 days with the mix of the major oxides and fine aggregates as an experimental formula through the use of two types of Portland cement resulting the compressive strength of the concrete highly dependent on time.
Portland cement structure and its major oxides and fineness
A. Nosrati,Y. Zandi,M. Shariati,K. Khademi,M. Darvishnezhad Aliabad,A. Marto,M.A. Mu’azu,E. Ghanbari,M.B. Mahdizadeh,A. Shariati,M. Khorami 국제구조공학회 2018 Smart Structures and Systems, An International Jou Vol.22 No.4
Predicting the compressive strength of concrete has been considered as the initial phase across the cement production processing. The current study has focused on the integration of the concrete compressive strength in 28 days with the mix of the major oxides and fine aggregates as an experimental formula through the use of two types of Portland cement resulting the compressive strength of the concrete highly dependent on time.