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ghayyem--sana
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Spectrophotometric and Colorimetric Determination of 4-Hydroxy-2 -Mercapto-6-Methylpyrimidine (MTU) Based on the Aggregation of Gold Nanoparticles
, M.Sc. Thesis Sharif University of Technology ; Hormozinezhad, Mohammad Reza (Supervisor)
Abstract
4-Hydroxy-2-mercapto-6-methylpyrimidine (MTU), is a drug from thiouracil antithyroid family which inhibits thyroid hormone synthesis and is generally used to remedy hyperthyroidism in gestation and liver disease. On the other hand, MTU has been applied to animals to gain higher weight . Since remaining of thyreostatic drugs in eatable animal tissues could be a risk to human health, their use in animal products was prohibited in the European Union in 1981.Based on these reasons, the need for an analytical procedure capable of determining MTU is of great importance. We report herein the development of a highly sensitive colorimetric method for the detection of MTU utilizing citrate capped gold...
Determining influence of different factors on production optimization by developing production scenarios
, Article Journal of Petroleum Exploration and Production Technology ; Volume 8, Issue 2 , June , 2018 , Pages 505-520 ; 21900558 (ISSN) ; Daryasafar, A ; Bakhshi, P ; Tavakoli, R ; Ghayyem, M. A ; Sharif University of Technology
Springer Verlag
2018
Abstract
Production optimization is defined as the process of maximizing oil production over the long term while minimizing total production costs. The overall goal is to achieve the optimum profitability from the well or field. In this process, the reservoir system can be considered as a multiple input–output system. In this complex system injection and production wells are known as inputs and outputs. The output of the system is often affected by various parameters consisting reservoir conditions, petrophysics, and PVT data. The optimization of the injector rates and number and installation of submersible pumps are the main issues which have been studied in this paper. Determining the factor with...
Biosorption of Uranium from Uranium Conversion Waste using Aspergillus Niger Fungus
, Ph.D. Dissertation Sharif University of Technology ; Roosta Azad, Reza (Supervisor) ; Yaghmaei, Soheyla (Co-Advisor)
Abstract
Presence of heavy metals in industrial waste has always been a serious environmental problem. One of such metals in uranium that is used in important industries such as nuclear industry. Thus, it must be excluded from industrial waste efficiently. This research aimed to study effect of local strain of aspergillus niger in bioabsoprtion of uranium from industrial waste in which good absorption was reached and absorption of local strain was compared with that of control strain obtained from PTCC. Also, local strain was collected from uranium anomalies of Bandar Abbas Mining Site and was used to identify it with reference strains available at NCBI site using PCR and proliferation of part of...
, M.Sc. Thesis Sharif University of Technology ; Rosta Azad, Reza (Supervisor) ; Yagmaei, Soheila (Supervisor) ; Sana, Solat (Co-Advisor)
Abstract
In this work, biosorption of Zirconium from aqueous solution by A.niger as a biosorbent was investigated. For this goal, both of live and dried biomasses were used. The effect of factors pH, temperature, contact time, initial concentration of metal and biomass dosage were investigated on biosorption. To preparing dried biomass,the live biomass was dried at 60-80 º C for 24 hr and then this dried cell was crushed by mortar and pestle and the drying biomass was ground through a set of sieve with 100 mesh. Also, effect of the pretreatment of biomass by NaOH 0.5 M on biosorption was studied. Optimization of factors was performed by Response Surface Methodology (RSM). The experiments were...