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Ehsani, Ali,Moshrefi, Reza,Ahmadi, Maliheh The Korean Electrochemical Society 2015 Journal of electrochemical science and technology Vol.6 No.1
3-(4-Iodophenyl)-2-imino-2,3-dihydrobenzo[d]oxazol-5-yl 4-methylbenzenesulfonate (4-IPhOXTs) was synthesized and its inhibiting action on the corrosion of stainless steel 316L (SS) in sulfuric acid was investigated by means of potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The results of the investigation show that this compound has excellent inhibiting properties for SS corrosion in sulfuric acid. Inhibition efficiency increases with increase in the concentration of the inhibitor. The adsorption of 4-IPhOXTs onto the SS surface followed the Langmuir adsorption model with the free energy of adsorption ΔG<sup>0</sup><sub>ads</sub> of −8.45 kJ mol<sup>−1</sup> . Quantum chemical calculations were employed to give further insight into the mechanism of inhibition action of 4-IPhOXTs.
Ehsani, A.,Safari, R.,Yazdanpanah, H.,Kowsari, E.,Shiri, H. Mohammad The Korean Electrochemical Society 2018 Journal of electrochemical science and technology Vol.9 No.4
The current study fabricated magnetic functional reduced graphene oxide (MFRGO) by relying on ${FeCl_4}^-$ magnetic anion confined to cationic 1-methyl imidazolium. Furthermore, for improving the electrochemical performance of conductive polymer, hybrid poly ortho aminophenol (POAP)/ MFRGO films have then been fabricated by POAP electropolymerization in the presence of MFRGO nanorods as active electrodes for electrochemical supercapacitors. Surface and electrochemical analyses have been used for characterization of MFRGO and POAP/ MFRGO composite films. Different electrochemical methods including galvanostatic charge discharge experiments, cyclic voltammetry and electrochemical impedance spectroscopy have been applied to study the system performance. Prepared composite film exhibited a significantly high specific capacity, high rate capability and excellent cycling stability (capacitance retention of ~91% even after 1000 cycles). These results suggest that electrosynthesized composite films are a promising electrode material for energy storage applications in high-performance pseudocapacitors.
Athlete` Satisfaction with Coach in Iran`s Student Football League: Based on Power
( Mohammad Ehsani ) 한국체육학회 2015 국제스포츠과학 학술대회 Vol.2015 No.1
The purpose of this study was to examined the relationships between the coaches` bases of power and athletes` satisfaction with coach, and how of coach power useserved as predictors of athletes` satisfactionwith coach. The instruments used were the Power in Sport Questionnaire-Other (PSQ-O for athletes); Athlete Satisfaction Questionnaire (ASQ) and a questionnaire related to demographic variables. Data were collected from athletes (n=264) in Student Footbball League in Iran. The results indicated the bases of power`s coaches were positively associated with athlete`s satisfaction. The results also indicated that perceived reward, coercive, referent and expert power of coaches were significant predictors of athlete`s satisfaction. But legitimate power did not significantly predict satisfaction; So that, 56% of the variance athletes` satisfaction with coachwas explained by bases of power`s coaches.
Quantitative analysis of relative tectonic activity in the Jarahi-Hendijan basin area, Zagros, Iran
Jahanbakhsh Ehsani,Mehran Arian 한국지질과학협의회 2015 Geosciences Journal Vol.19 No.4
Quantitative analysis is a major factor controlling landform development in tectonically active regions, and it has significantly affected fluvial systems and mountain-front landscapes in the Jarahi-Hendijan basin area of the Zagros, southwest Iran. The area is located along the high Zagros, Zagros simple folded belt and coastal plain. It is an outcome of the SE-NW oriented tectonic conversion that initiated in the Late Cretaceous and strengthened during the Early Miocene due to the collision of the Arabian and Eurasian plates. To assess tectonic activities in the area, we have analyzed geomorphic indices: the stream-gradient index (SL), drainage basin asymmetry (Af), hypsometric integral (Hi), valley floor width-valley height ratio (Vf), drainage basin shape (Bs) and mountain-front sinuosity (Smf). These indices were combined to yield the relative active tectonics index (Iat) using geographic information systems (GIS). Based on Iat values, the study area was divided into four parts: Class 1 (very high relative tectonic activity, 11.5% in area); Class 2 (high, 27.7%); Class 3 (moderate, 23.4%), and Class 4 (low, 37.4%). The results are consistent with field observations on landforms and the regions with high relative tectonic activity mostly correspond with the active mountain front faults at the northern part of study area. The coastal plain in the west and southwest of the area show the lowest relative tectonic activity (class 4).
SENSOR ELIMINATION IN SWITCHED RELUCTANCE MOTOR DRIVES: AN OVERVIEW AND STATE OF THE ART
M.Ehsani,I.Husain,K.R.Ramani,S.Mahajan 전력전자학회 1992 ICPE(ISPE)논문집 Vol.1992 No.4
Advantages of the switched reluctance motor (SRM) drives make it an attractive candidate for replacing many adjustable speed ac and dc drives in both industrial and consumer applications. The simple, low cost and robust SRM drive can be efficiently operated in hostile environments, such as under the hood of an automobile. The purpose of this paper is to introduce the basic SRM drive concept and present some of the recent shaft sensor and current sensor elimination concepts and new converters which have<br/> been developed to further simplify this motor drive.
Ali Ehsani,Mahmoud Nasrollahzadeh,Mohammad Ghasem Mahjani,Reza Moshrefi,Hossein Mostaanzadeh 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.6
The 3,30-(1,4-phenylene)bis(2-imino-2,3-dihydrobenzo[d]oxazole-5,3-iyl)bis(4-thylbenzenesulfonate)(1,4-Ph(OX)2(Ts)2) was synthesized and its inhibiting action on the corrosion of 1005 aluminum alloy(Al) in sulphuric acid was investigated by means of potentiodynamic polarization and electrochemicalimpedance spectroscopy (EIS). In the potentiodynamic polarization measurements the values of bc hadsmall changes with increasing inhibitor concentration, which indicated that the 1,4-Ph(OX)2(Ts)2 wasadsorbed on the metal surface and the addition of the inhibitor hindered the acid attack on the Alelectrode. In anodic domain, the value of ba decreases with the presence of 1,4-Ph(OX)2(Ts)2. The shift inthe anodic Tafel slope ba might be attributed to the modification of anodic dissolution process due to theinhibitor modules adsorption on the active sites. The inhibition efficiencies were obtained from weightloss measurement and electrochemical tests. The adsorption of 1,4-Ph(OX)2(Ts)2 onto the Al surfacefollowed the Langmuir adsorption model with the free energy of adsorption -△G0ads of -5.13 kJ mol1. Quantum chemical calculations were employed to give further insight into the mechanism of inhibitionaction of 1,4-Ph(OX)2(Ts)2.
Efficiency of dietary sodium alginate coating incorporated with lycopene in preserving rainbow trout
Ali Ehsani,Marzieh Paktarmani,Mohammad Yousefi 한국식품과학회 2017 Food Science and Biotechnology Vol.26 No.3
The main aim of this study was to investigate the effect of alginate coating without or with lycopene at levels of 0.5, 1, 1.5, and 3% on the quality of rainbow trout stored under refrigerated conditions for 16 days. Samples coated with alginate with or without lycopene showed significantly lower free fatty acid (FFA) and total volatile basic nitrogen (TVB-N) values compared to uncoated (control) filets, particularly after day 4. Moreover, significant differences (p\0.05) were observed between the coated samples containing lycopene and samples not containing lycopene on the last day. In relation with pH, none of the treatments resulted in significant differences. In regard to oxidation parameters, the effect of alginate-lycopene coatings was only seen on day 16 of storage. In general, although alginate- lycopene coating had no significant effect on the reduction of thiobarbituric acid and peroxide values, it succeeded in decreasing the TVB-N and FFA values.