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Surianarayanan Mahadevan,Senthilkumar Sivaprakasam,Madhuchhanda Bhattacharya 한국생물공학회 2007 Biotechnology and Bioprocess Engineering Vol.12 No.4
Biocalorimetry has proved to be a useful tool for scale up and control of bioreactors. The findings reported here are fundamental data required for scale up and control of a reactor for the treatment of saline tannery wastewater. The study deals with biokinetics of a halo-tolerant bacteria Pseudomonas aeruginosa isolated from tannery saline wastewater (soak liquor). Batch experiments were performed in a biocalorimeter and the isolated strain was grown in a glucose-limited mineral salt medium (MSM) at optimized growth conditions. Tessier model is found to fit well for the growth of P. aeruginosa in biocalorimeter. Biokinetic constants are evaluated and simulation is done to validate experimental results with theoretical values. Respirogram and heat profiles are seen to follow the biomass growth curve. Oxycalorific coefficient is validated with the theoretical values and those noticed in the published literature. There is a good correlation between experimentally determined heat yields and the theoretical values predicted by elemental and enthalpy balances. The heat yield and biomass yield values indicated the behavior of the isolated organism in a substrate-limited well defined growth media (MSM).
Surianarayanan Mahadevan,Balaji Dhandapani,Senthilkumar Sivaprakasam,Asit Baran Mandal 한국생물공학회 2010 Biotechnology and Bioprocess Engineering Vol.15 No.4
Biocalorimetry has proved to be an efficient tool for studying the energetics involved in several biochemical reactions. In this study, biocalorimetry was employed to simultaneously analyze biokinetics and bioenergetics involved during cultivation of a salt tolerant Pseudomonas aeruginosa for the production of alkaline protease. Batch experiments were performed in a bench scale biocalorimeter for alkaline protease production by P. aeruginosa using optimized process conditions. Tessier’s double substrate growth model was found to provide a good fit for the growth of P. aeruginosa in the biocalorimeter,and the biokinetic parameters were estimated. The heat flow profile resulting from metabolic activity of P. aeruginosa was shown to accurately depict both the kinetics of cell growth and protease production. Biokinetic and bioenergetic analysis on the growth of P. aeruginosa revealed that peptone is preferentially used as the substrate for its intracellular activities and glycerol acts as an energy source for its growth metabolism.
Sivaprakasam, Senthilkumar,Mahadevan, Surianarayanan,Bhattacharya, Madhuchhanda Korean Society for Biotechnology and Bioengineerin 2007 Biotechnology and Bioprocess Engineering Vol.12 No.4
Biocalorimetry has proved to be a useful tool for scale up and control of bioreactors. The findings reported here are fundamental data required for scale up and control of a reactor for the treatment of saline tannery wastewater. The study deals with biokinetics of a halo-tolerant bacteria Pseudomonas aeruginosa isolated from tannery saline wastewater (soak liquor). Batch experiments were performed in a biocalorimeter and the isolated strain was grown in a glucose-limited mineral salt medium (MSM) at optimized growth conditions. Tessier model is found to fit well for the growth of P. aeruginosa in biocalorimeter. Biokinetic constants are evaluated and simulation is done to validate experimental results with theoretical values. Respirogram and heat profiles are seen to follow the biomass growth curve. Oxycalorific coefficient is validated with the theoretical values and those noticed in the published literature. There is a good correlation between experimentally determined heat yields and the theoretical values predicted by elemental and enthalpy balances. The heat yield and biomass yield values indicated the behavior of the isolated organism in a substrate-limited well defined growth media (MSM).
Vigneshkumar Sekar,Karthikeyan Rajendran,Sugumari Vallinayagam,Venkataraman Deepak,Surianarayanan Mahadevan 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.62 No.-
This study focuses on synthesis and characterization of chitosan ascorbate nanoparticles (CANs) from a salified carboxylate form of chitosan with ascorbic acid. Evident changes were observed in crystallinity and structure of CANs from their parent polymer. CANs exhibited improved antioxidative properties against DPPH, ABTS, and FRAP. In vitro effect of CANs on cervical cancer cells (HeLa) and noncancer human fibroblast cells (WI-38) viability showed portentous toxic effects on cancer cells with reduced viability on increasing CANs concentration. However, no significant effect was observed in the fibroblast cells. Further, in silico docking on cervical cancer protein targets also showed efficient binding.