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Articles by S. Shankar
Total Records ( 3 ) for S. Shankar
  V. Balamurugan , S. Shankar and S. Chandramohan
  In this study, a new metal complex of Cu (II) with N, N’-bis(benzoin)-1,4 butane diimine was synthesized and characterized by FT-IR, 1H-NMR and Scanning Electron Microscope. The antioxidant activity of this complex was studied and compared with the activity of ascorbic acid. Antioxidant study was carried out against the 2,2-diphenyl-1-picrylhydrazyl radical (DPPH) which shows the metal complex found to be good antioxidant, as comparable with ascorbic acid.
  Ghorakavi Deepthi , Anjana Jain and S. Shankar
  This research includes study of Doubly Fed Induction Generator (DFIG) connected to variable speed Wind Energy Conversion System (WECS). WECS connected to grid is composed of back-to-back PWM converters on the rotor side. Instantaneous Reactive Power Theorem (IRPT) based control technique is used for Rotor Side Converter (RSC) control and Direct Power Control (DPC) is used for Grid Side Converter (GSC) control. Proposed control strategy is used for voltage and frequency control of DFIG. IRPT helps in reactive power compensation, attaining unity power factor and reduction of harmonics. The developed system is validated using MATLAB/Simulink for different dynamic conditions.
  S. Shankar and S. Thiripura Salini
  The present study describes the antioxidant activity of Canthium coromandelicum for its medicinal values. Antioxidant compounds play an important role as a health defending factor and are called as free radical scavengers. Antioxidant activity or free radical scavenging activity of Canthium coromandelicum was evaluated by using 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical, nitric oxide radical, superoxide anion radical, reducing power and total antioxidant activity of this plant extract. In all the testing, a significant correlation existed between concentrations of the extract and percentage inhibition of free radicals. These results clearly indicate that Canthium coromandelicum is effective against free radical mediated diseases.
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