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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Journal of Nanoanalysis
- نوع مقاله: Journal Article
- کلمات کلیدی: Catalytic activity,Hydrothermal Method,Structural study,CuBi2O4
- چکیده:
- چکیده انگلیسی: In the present work CuBi2O4 nano-spinel has been synthesized via mild hydrothermal method
at 180°C for 10 h. The synthesized nanomaterials were characterized by several techniques
to emphasis the structure and properties of produced materials. The crystal structure was
investigated by X-ray powder diffraction method and the values of the refined unit cell volume
and the structure properties were studied by using the Rietveld analysis is done using Fullprof
program. The results shew the formation of tetrahedral structure with space group P4/
ncc for this sample. Also, the morphologies of the synthesized materials were figured out
by field emission scanning electron microscope (FE-SEM). According to the FESEM images,
several nano cubic form of particles grew on micro spherical particles. As well, the catalytic
performance of obtained CuBi2O4 was studied in Biginelli reaction. The reaction conditions of
this study optimized by experimental design method. This experiment stablished high catalytic
performance of copper bismuth oxide in compare with some other metal oxide catalysts. Also,
the results shew this product is reusable homogenous catalyst.- انتشار مقاله: 28-01-1396
- نویسندگان: Fatemeh Soleimani,Mehdi Salehi,Ahmad Gholizadeh
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Pharmaceutical Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Clinical study,Polymorphism,Asthma,Beta-adrenoceptor
- چکیده:
- چکیده انگلیسی: Glycine allele at codon 16 has previously been associated with the increase in asthma severity, bronchial hyperresponsiveness and also the increase in inhaled corticosteroid dependence. This study was designed to evaluate the genetic alleles in mild asthma.
Thirty-four patients with diagnosis of mild asthma (FEV1 ≥ 80%, positive methacholine test) and body mass index (BMI ≤ 30 Kg/m2) were included in the study. They could only use short acting beta-2 agonists for asthma control. Smoking, infection, occupational sensitizers’ exposure, gastroesophageal reflux, diabetes mellitus and heart failure were also considered as exclusion criteria. All patients were genotyped at 16th and 27th codons.
Among all, 20 (58.8%) Arg/Gly, 14 (41.2%) Arg/Arg and no Gly/Gly genotype were detected at codon 16. Genotyping at codon 27 revealed 2 (5.9%) Glu/Glu, 13 (38.2%) Glu/Gln and 18 Gln/Gln (52.9%).
Based on the obtained results, Arg/Gly mutation had a higher rate among the studied subjects compared to Arg/Arg polymorphism. This is a pilot study which shows a probable usefulness of genotyping for predicting of asthma severity.- انتشار مقاله: 24-08-1390
- نویسندگان: Parisa Adimi Naghan,Fanak Fahimi,Seyed Alireza Nadji,Nima Naderi,Fatemeh Soleimani,Mohammad Reza Masjedi
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Chemistry and Chemical Engineering
- نوع مقاله: Journal Article
- کلمات کلیدی: Photocatalytic activity,Malachite Green,Solid-state,Ni0.5Cu0.5Cr2O4
- چکیده:
- چکیده انگلیسی: In this research, pure-phased Ni0.5Cu0.5Cr2O4 synthesis via solid-state method successfully. In the other part, the photocatalytic activity of synthesized Ni0.5Cu0.5Cr2O4 was investigated in various aspects by using Malachite green as a pollutant and compared with the number of previous photocatalysts. The Photocatalysis process is a promising technique for solving many current environmental and energy issues. The environmental pollutant, especially water contaminates, can influence human health, animals, and the ecosystem. Dye as one of the most important pollutants has investigated in this study. In this study, purification and crystal structure of material have been determined by X-Ray powder Diffraction (XRD) method. The results showed that the synthesized Ni0.5Cu0.5Cr2O4 was crystallized in tetragonal structure with space group I 41/AMD. The morphology of obtained materials was modified by Field Emission Scanning Electron Microscope (FESEM). Also, the material was characterized by Fourier-Transform InfraRed (FT-IR) spectroscopy and Thermo Gravimetric Analysis (TGA).
- انتشار مقاله: 28-11-1396
- نویسندگان: Fatemeh Soleimani,Mehdi Salehi,Ahmad Gholizadeh
- مشاهده
- جایگاه : پژوهشی
- مجله: International Journal of Nano Dimension
- نوع مقاله: Journal Article
- کلمات کلیدی: Photocatalytic activity,Malachite Green,Hydrothermal Method,CuCr2O4,Mn0.5Cu0.5Cr2O4
- چکیده:
- چکیده انگلیسی: In this study phase- pure new spinel structure, Mn0.5Cu0.5Cr2O4 was prepared by hydrothermal method successfully and the degradation of Malachite green as an organic pollutant was investigated and compared with CuCr2O4. Purification of obtained nanoparticles was measured by using X-ray diffraction method (XRD) in which crystal structure and the structural properties were studied by using X’Pert package and Fullprof program. Also, the morphology of obtained materials was modified by field-effect scanning electron microscopy (FESEM). These materials were characterized by Fourier-transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA), respectively. UV-vis diffuse reflectance analysis was done for determination of band gape which evaluated 1.37eV.The photocatalytic application of synthesized materials was evaluated by the degradation of malachite green (MG) in the presence of H2O2 that were assessed by UV–vis spectroscopy analysis. The comparison study of photocatalytic result reviled that Mn0.5Cu0.5Cr2O4 has higheractivity than CuCr2O4.
- انتشار مقاله: 03-10-1397
- نویسندگان: Fatemeh Soleimani,Mahdi Salehi,Ahmad Gholizadeh
- مشاهده
- جایگاه : پژوهشی
- مجله: Advances in Industrial Engineering
- نوع مقاله: Journal Article
- کلمات کلیدی: Genetic Algorithm,Mathematical Modeling,Production Scheduling,Flexible Job-Shop,Reverse Flows,Taguchi Method
- چکیده:
- چکیده انگلیسی: One of the important issues in the field of flexible job-shop production scheduling is reverse flows within a single production unit, as is the case in the assembly/disassembly plants. This paper studies the flexible job-shop scheduling by employing reverse flows approach, which consists of two flows of jobs at each stage in opposite directions. The problem can be used only if you have two flows: the first one going from first stage to last stage, and the second flow going from last stage to first stage. Then, a mathematical model of problem is provided to minimize the maximal completion time of the jobs (i.e., the makespan). Because of the complexity solving and proving that this problem ranked on NP-hard problems, we proposed meta-heuristic algorithm genetic (GA). Also, The parameters of these algorithm GA and their appropriate operators are obtained by the use of the Taguchi experimental design. The computational results validate outperforms proposed algorithm GA.
- انتشار مقاله: 28-01-1396
- نویسندگان: Fatemeh Soleimaninia,Esmaeil Mehdizadeh
- مشاهده