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RISS 인기검색어
- 검색키워드
- 저자 : S. Hasanzadeh (검색결과 4 건)
- 무료
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- 유료
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Performance Analysis of Contactless Electrical Power Transfer for Maglev
S. Hasanzadeh,S. Vaez-Zadeh 한국자기학회 2012 Journal of Magnetics Vol.17 No.2
Contactless electrical power transfer through an air gap is a revived technology for supplying energy to many movable applications including Maglev. In this paper, magnetic equivalent circuits and analytical models of contactless electrical power transfer systems are developed and evaluated through experiment. Overall coupling coefficient and overall efficiency are introduced as means for evaluating the systems’ performance. Compensating capacitors in primary and secondary sides of the systems improve the overall coupling coefficient and overall efficiency. Using the analytical models, the effects of different parameters and variables such as air gap and load current are analyzed to give a high coupling coefficient and an improved efficiency of power transfer for different compensation structures.
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Khataee, A.,Hasanzadeh, A.,Lotfi, R.,Joo, S.W. Pergamon Press ; Elsevier Science Ltd 2016 Talanta Vol.152 No.-
<P>A novel chemiluminescence (CL) system is introduced based on the oxidation of carminic acid by KMnO4 in acidic conditions. CdS quantum dots (QDs) were synthesized using a facile hydrothermal method which efficiently enhanced the intensity of the CL system. A possible mechanism for the proposed system is presented using the kinetic curves, CL spectra, photoluminescence (PL), and ultraviolet-visible (UV-Vis) analysis. The emission intensity of the KMnO4-carminic acid-CdS QDs system was quenched in the presence of a trace level of cloxacillin. Based on this quenching effect, a novel and sensitive flow injection CL method was developed for determining cloxacillin concentrations. At optimal experimental conditions, the decreased CL intensity had a good linear relation with the cloxacillin concentration in the range of 0.008 to 22.0 mg L-1. The detection limit (3 sigma) was 5.8 mu g L-1. The precision of the method was calculated by analyzing samples containing 4.0 mg L-1 of cloxacillin (n=11), and the relative standard deviations (RSD%) were 2.08%. The feasibility of the method is also demonstrated for determining cloxacillin concentrations in environmental water samples and a pharmaceutical formulation. (C) 2016 Elsevier B.V. All rights reserved.</P>
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Khataee, A.,Sajjadi, S.,Hasanzadeh, A.,Vahid, B.,Joo, S.W. Academic Press 2017 Journal of environmental management Vol.199 No.-
<P>Natural Martite ore particles and graphite were modified by alternating current (AC) glow discharge plasma to form nanostructured catalyst and cathode electrode for using in the heterogeneous-electro Fenton-like (Het-EF-like) process. The performance of the plasma-treated martite (PTM) and graphite electrode (PTGE) was studied for the treatment of paraquat herbicide in a batch system. 85.78% degradation efficiency for 20 mg L-1 paraquat was achieved in the modified process under desired operational conditions (i.e. current intensity of 300 mA, catalyst amount of 1 g L-1, pH = 6, and background electrolyte (Na2SO4) concentration of 0.05 mol L-1) which was higher than the 41.03% for the unmodified one after 150 min of treatment. The ecofriendly modification of the martite particles and the graphite electrode, no chemical needed, low leached iron and milder operational pH were the main privileges of plasma utilization. Moreover, the degradation efficiency through the process was not declined after five repeated cycles at the optimized conditions, which proved the stability of the nanostructured PTM and PTGE in the long-term usage. The archived results exhibit this method is the first example of high efficient, cost-effective, and environment-friendly method for generation of nanostructured samples. (C) 2017 Elsevier Ltd. All rights reserved.</P>
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Khataee, A.R.,Hasanzadeh, A.,Iranifam, M.,Fathinia, M.,Hanifehpour, Y.,Joo, S.W. Pergamon 2014 Spectrochimica acta. Part A, Molecular and biomole Vol.122 No.-
A novel, rapid and sensitive CuO nanosheets (NSs) amplified flow-injection chemiluminescence (CL) system, luminol-H<SUB>2</SUB>O<SUB>2</SUB>-CuO nanosheets, was developed for determination of the vancomycin hydrochloride for the first time. It was found that vancomycin could efficiently inhibit the CL intensity of luminol-H<SUB>2</SUB>O<SUB>2</SUB>-CuO nanosheets system in alkaline medium. Under the optimum conditions, the inhibited CL intensity was linearly proportional to the concentration of vancomycin over the ranges of 0.5-18.0 and 18.0-40.0mgL<SUP>-1</SUP>, with a detection limit (3σ) of 0.1mgL<SUP>-1</SUP>. The precision was calculated by analyzing samples containing 5.0mgL<SUP>-1</SUP> vancomycin (n=11) and the relative standard deviation (RSD) was 2.8%. Also, a high injection throughput of 120 sample h<SUP>-1</SUP> was obtained. The CuO nanosheets were synthesized by a sonochemical method. Also, X-ray diffraction (XRD) and scanning electron microscopy (SEM) analyses were employed to characterize the CuO nanosheets. The method was successfully employed to determine vancomycin hydrochloride in environmental water samples, pharmaceutical formulation and spiked human serum.
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