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Articles by S. Manivannan
Total Records ( 3 ) for S. Manivannan
  S. Manivannan , R. Arumugam , N.M. Sudharsan and S. Prasanna Devi
  This study presents an approach for the multiple linear regressions modeling of the flat plate heat sink using Taguchi Design of Experiments method. The responses studied were electromagnetic radiation and thermal resistance of the heat sink. The heat sink is modeled using Ansoft HFSS and Flotherm software for finding the emitted radiation and thermal resistance of the heat sink respectively. Experimental investigations were performed to find the thermal resistance and emitted radiations from the heat sink and thus the simulation model was validated with the experimental results. The simulations were continued for the combinations generated by the L27 (6 factors, 3 levels) Taguchi ’s Design of Experiments using Minitab software. The factors considered for L27 are the length and width of the heat sink, Fin height, Base height, Number of fins and fin thickness. The values of responses are used to develop Meta models for the heat sink using multiple linear regression analysis. Thus the developed meta models replaces the use of the above mentioned simulation software ’s for finding out the responses by saving the modeling, simulation time and cost of simulation software.
  K. Kathiresan and S. Manivannan
  Effects of pH, temperature, mineral salts, incubation time, sources and concentrations of carbon and nitrogen were tested in submerged fermentation process in production of glucose isomerase by Penicillium fellutanum isolated from coastal mangrove soil. The production medium prepared in distilled water, supplemented with 0.1% mineral salts, 1.5% xylose (carbon source), 1% yeast extract (nitrogen source), maintained with pH of 6.5 and incubated at 30°C for 120 h was found optimal for production of glucose isomerase.
  G. Devanathan , A. Shanmugam , T. Balasubramanian and S. Manivannan
  Aspergillus niger was isolated from the soil samples of mangrove debris in Vellar estuary (Parangipettai, India) and it was used for cellulase production. The physical and chemical parameters of fermentation like pH, temperature, incubation time, substrate, carbon and nitrogen source were optimized. The optimal conditions for the biosynthesis of cellulase by A. niger were found to be pH: 6.5, Temperature: 30°C, Incubation period: 96 h, carbon source: Lactose, Substrate: wheat bran and nitrogen source: peptone.
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