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Lalithamba, H. S.
- Transesterification of Pumpkin Oil Using Nano Calcium Oxide Catalyst
Authors
1 Department of Mechanical Engineering, Siddaganga Institute of Technology, Tumkur, Karnataka, IN
2 Department of Chemistry, Siddaganga Institute of Technology, Tumkur, Karnataka, IN
Source
International Journal of Innovative Research and Development, Vol 5, No 11Sp (2016), Pagination: 58-61Abstract
Due to the increase in population and economic growth of the nation, particularly in growing countries like India, has resulted in huge demand of energy sources. Due to reduction of non-renewable petroleum sources and recent hike in petroleum prices and lack of availability of petroleum products have generated interest in extraction of energy from renewable energy sources wherein the biodiesel plays an important role which is derived from plant origin for diesel engines. In this study crude Pumpkin seed oil was used as a feedstock for biodiesel production by Nano-CaO catalyzed methanolysis. The produced biodiesel was characterized by Fourier transform infrared spectroscopy (FTIR). The fuel properties of pumpkin biodiesel such as viscosity, density, flashpoint, ash content, carbon residue, pour point and calorific value were investigated according to ASTM standards. The biodiesel-diesel blends (B10, B20, B30, B40 and B50) were prepared and fuel properties (viscosity, density and flash point) also investigated.
Keywords
Pumpkin Biodiesel, Fuel Properties, Viscosity, Density, Flash Point.- Synthesis of Nα-Protected Diazomethylketone Using COMU and its Application in the Preparation of Bromomethylketones and Selenazoles:Study of Antibacterial and Antioxidant Activities
Authors
1 Department of Chemistry, Siddaganga Institute of Technology, Tumakuru, Karnataka, IN
Source
International Journal of Innovative Research and Development, Vol 5, No 11Sp (2016), Pagination: 129-135Abstract
An efficient protocol for the synthesis of N-protected diazomethylketone was developed using (1-cyano-2-ethoxy-2-oxoethylideneaminooxy)-dimethylamino-morpholinomethylene) methanaminium hexa-fluorophosphate (COMU) and N-nitrosourea (NNU) is developed. Conversion of carboxylic acids to diazomethylketones in an excellent yield was obtained under milder reaction conditions, through a simple workup. Further, the synthesized compounds were used for the preparation of bromomethylketones using 45% aqueous HBr and selenazoles. Prepared bromomethylketones were subjected for their antibacterial activity against Escherichia coli and Staphylococcus aureus strains and antioxidant studies. Antibacterial activity reveals that the compound Fmoc-Phe-CO-CH2-Br exhibited the zone of inhibition with respect to Streptomycin sulphate standard. For antioxidant assay, % RSC of Fmoc-Ala-CO-CH-N2, Fmoc-Phe-CO-CH2-Br and Fmoc-Phe-CO-CH-N2 exhibited free radical inhibition or scavenger activity with 2, 2-diphenyl-1-picrylhydrazyl (DPPH). The synthesized compounds were characterized by HRMS, 1H NMR, and 13C NMR studies.
Keywords
N-Protected Diazomethyl Ketone, Bromomethyl Ketone, Selenazole, COMU, NNU, Antibacterial and Antioxidant Studies.- Green Synthesis, Characterization and Electrical Properties of Iron Doped Vanadium Oxide for Strain Gauges
Authors
1 Department of Electronics and Instrumentation Engineering, Siddaganga Institute of Technology, Tumakuru- 572103, Karnataka, IN
2 Department of Chemistry, Siddaganga Institute of Technology, Tumakuru-572103, Karnataka, IN
Source
Journal of Mines, Metals and Fuels, Vol 70, No 8A (2022), Pagination: 135-143Abstract
A series of vanadium oxide (V2O5) nanoparticles containing small varying concentrations of iron (Fe) were synthesized using green protocol to test its suitability towards strain gauges. The morphological, structural, transmission spectral and the dielectric properties of the synthesized nanoparticles were characterized using SEM, HRTEM, XRD, FTIR and the LCR meter respectively. The structural analysis results depict a transformation from amorphous to orthorhombic cubic phased crystalline structure. The morphological data denote an improvement in the appearance of the samples without any cracks. A better electronic transition due to high activation energy was observed from the slight shift of the transmission spectral peaks towards the lower wave number. The improved conductivity from 5.37 to 12.51 S/m in conjunction with the better temperature characteristics, specially incase of 15 wt% Fe:V2O5 contributes to the enhanced sensitivity of the samples. The overall results from the characterization emphasize the synthesized nanoparticle’s remarkable attributes towards the fabrication of thin film strain gauges.Keywords
Nanoparticles, Vanadium Oxide, Iron, Electrical Properties, Strain Gauge.References
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