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RISS 인기검색어
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- 저자 : Rode, Ambadas B (검색결과 31 건)
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Synthesis and Evaluation of Stearic Acid Derivatives as Cetane Number Improvers
Rode, Ambadas B.,Thajudeen, H.,Chung, Keun-Woo,Kim, Young-Wun,Hong, In-Seok Korean Chemical Society 2011 Bulletin of the Korean Chemical Society Vol.32 No.6
1,2,4,5-tetraoxane, mono and dinitrate glycerol carbonate ester derivatives of stearic acid were synthesized along with the known 9(10)-keto methyl sterate, methoxy mono-nitrate and dinitrate of methyl stearate. Their cetane numbers (CNs) were investigated to evaluate their viability for use as CN improvers. The CN performances of tetraoxane and all of the nitrate derivatives were investigated at 500 and 1000 ppm concentrations and compared to that of a traditional CN improver 2-ethylhexyl nitrate (2-EHN). The experimental results suggest that all derivatives evaluated in this study showed better CN improvement than base diesel fuel. Specifically, the 1,2,4,5-tetraoxane derivative of stearic methyl ester was superior to all derivatives studied, also being superior to 2-EHN. We also discussed the correlations between the observed CN trends and thermo-analytical data resulted from thermo gravimetric analysis curves (TGA) and differential scanning calorimetry (DSC).
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A review on development in design of multistage centrifugal pump
Rode, Bhushan R.,Khare, Ruchi Techno-Press 2021 Advances in computational design Vol.6 No.1
Multi-stage pumps are the most popular pumps among various kinds of centrifugal pumps. Athorough review of different kinds of literature has led to the conclusion that there is a desperate need to increase the performance of the multi-stage centrifugal pump. Many investigators have put their efforts to increase the pump performance and also the work is being projected on various aspects of pump performance variables. To improve the multistage centrifugal pump performance by investigation, modification, and analysis many works of literature are available. For analysis, many researchers used the Navier-Stokes solver to create the three-dimensional unsteady turbulent flow numerical model with the standard k-ε turbulent equation. This paper mainly focuses on research related to the multi-stage centrifugal pump.
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Positive magnetisation in carbon nanostructures
A.V. Rode,A.G. Christy,N.R. Madsen,E.G. Gamaly,S.T. Hyde,B. Luther-Davies 한국물리학회 2006 Current Applied Physics Vol.6 No.3
Carbon nanoclusters produced by high-repetition-rate laser ablation of glassy carbon in Ar exhibits para- and ferromagnetic behav-iour up to 90 K, showing a narrow hysteresis curve with a coercive forceHc = 420 Oe, remnant magnetisation of 5· 10. 3 emu/g, sus-ceptibility of the order of 10. 5 emu/g Oe and saturation magnetization 0.30.8 emu/g at 1.8 K. We consider briey the mechanism offormation of clusters in the laser-ablated vapour and structural characteristics of the nanoclusters, which show the presence of graph-ite-like sheets with hyperbolic curvature, as proposed for ‘‘schwarzite’’. We postulate that localized unpaired spins occur because of topo-oered by the convoluted sheets.
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Synthesis and Evaluation of Stearic Acid Derivatives as Cetane Number Improvers
Ambadas B. Rode,Young-Wun Kim,Keunwoo Chung,H. Thajudeen,In Seok Hong 대한화학회 2011 Bulletin of the Korean Chemical Society Vol.32 No.6
1,2,4,5-tetraoxane, mono and dinitrate glycerol carbonate ester derivatives of stearic acid were synthesized along with the known 9(10)-keto methyl sterate, methoxy mono-nitrate and dinitrate of methyl stearate. Their cetane numbers (CNs) were investigated to evaluate their viability for use as CN improvers. The CN performances of tetraoxane and all of the nitrate derivatives were investigated at 500 and 1000 ppm concentrations and compared to that of a traditional CN improver 2-ethylhexyl nitrate (2-EHN). The experimental results suggest that all derivatives evaluated in this study showed better CN improvement than base diesel fuel. Specifically, the 1,2,4,5-tetraoxane derivative of stearic methyl ester was superior to all derivatives studied, also being superior to 2-EHN. We also discussed the correlations between the observed CN trends and thermo-analytical data resulted from thermo gravimetric analysis curves (TGA) and differential scanning calorimetry (DSC).
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Helical-edge transport near ν = 0 of monolayer graphene
홍성주,Belke Christopher,Rode Johannes C.,Brechtken Benedikt,Haug Rolf J. 한국물리학회 2021 Current Applied Physics Vol.27 No.-
The complex nature of filling factor ν = 0 of monolayer graphene is studied in magnetotransport experiments. As a function of perpendicular magnetic field a metal-insulator transition is observed, which is attributed to disorder-induced Landau level broadening in the canted antiferromagnetic phase. In the metallic regime a separation of the zeroth Landau level appears and signs of the quantum spin Hall effect are seen near ν = 0. In addition to local transport, nonlocal transport experiments show results being consistent with helical edge transport.
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Kumar, Indresh,Rana, Sravendra,Rode, Chandrashakher V.,Cho, Jae Whan American Scientific Publishers 2008 Journal of Nanoscience and Nanotechnology Vol.8 No.7
<P>Single-walled carbon nanotubes (SWCNTs) were chemically functionalized with amino acid-based moieties. The covalent functionalization of alkyne-derived SWCNTs with well defined azides derived from amino acids was accomplished through Cu(I)-catalyzed Huisgen [3 + 2] dipolar cycloaddition click chemistry. Transmission electron microscopy, Raman spectroscopy, and infrared spectroscopic measurements confirmed the functionalization of SWCNTs by organic molecules derived from amino acids, and the resulting material showed some good solubility in the organic solvents such as tetrahydrofuran, CH2Cl2, and CHCl3.</P>
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