Publications by authors named "K A RameshKumar"

In this experimental study, the performance, combustion and emission analysis of the combined effect of acetone and Zinc Oxide (ZnO) dispersed diesel-biodiesel (B20) blends were done in four-stroke, single-cylinder and water-cooled diesel engine. ZnO was synthesized by the solvothermal method using cow urine as a solvent and reducing agent. The synthesized ZnO was characterized by X-ray diffraction (XRD) and Scanning Electron Microscope (SEM).

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For the optimization of silver nanoparticle production, a central composite design was used with three parameters: AgNO concentration, green tea extract concentration, and temperature at three different levels. The size of the synthesized silver nanoparticle, its UV absorbance, zeta potential, and polydispersity index were set as the response parameters. Silver nanoparticles obtained in the optimization process were characterized and its efficacy on colorimetric detection of mercury was evaluated.

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A major problem that is confronting mankind is the rapid depletion of fossil resources creating an energy demand along with their environmental impact. Therefore, finding an alternate energy source is the primary goal to attain sustainable development. Biodiesel is a promising alternate energy source for compression ignition engines.

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Two new caged xanthones, wightiic acid (1) 16-O-methyl wightiic acid (2), along with eight known compounds, gaudichaudic acid E (3), isogaudichaudic acid E (4), ursolic acid (5) stigmasterol (6), lupeol (7), glutinol (8), lupenone (9) and stigmasteryl linoleate (10) were isolated from Garcinia wightii T. Anderson. The structures of the compounds were elucidated by spectroscopic means, including 1D and 2D NMR, HR-ESIMS, and the absolute configuration of the new compounds 1 and 2 were determined by analysis of ECD data.

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