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Karthikprabhu, S.,Karuppasamy, K.,Vikraman, Dhanasekaran,Prasanna, K.,Maiyalagan, T.,Nichelson, A.,Kathalingam, A.,Kim, Hyun-Seok Elsevier 2018 APPLIED SURFACE SCIENCE - Vol.449 No.-
<P><B>Abstract</B></P> <P>This study demonstrated to synthesis of carbon-free lithium nickel phosphate (LiNiPO<SUB>4</SUB>) and its analogue of manganese doped LiNi<SUB>1−x</SUB>Mn<SUB>x</SUB>PO<SUB>4</SUB> (x = 0.05–0.2) cathode materials by a facile polyol method and their suitability for use in high voltage lithium ion batteries (LIBs). The physicochemical properties were analyzed using X-ray diffraction, Fourier transform infra-red, Raman, field emission scanning electron microscopy (FE-SEM), energy dispersive analysis by X-ray (EDX), and electrochemical studies. FE-SEM showed that the spherical shape particles were uniformly distributed on the surface and EDX confirmed the presence of all the elements in the LiNi<SUB>1−x</SUB>Mn<SUB>x</SUB>PO<SUB>4</SUB> nanostructure. Substitution of Mn dopants with LiNiPO<SUB>4</SUB> significantly improved the electrical and electrochemical performances for LiNi<SUB>1−x</SUB>Mn<SUB>x</SUB>PO<SUB>4</SUB> (x = 0.05–0.2) cathodes. The highly conducting LiNi<SUB>1−x</SUB>Mn<SUB>x</SUB>PO<SUB>4</SUB> (x = 0.1) cathode exhibited initial discharge capacity of 94.2 mA h g<SUP>−1</SUP> at <I>C</I>/4 rate, and 62% capacity retention after 100 cycles between 2.8 and 5.6 V. These features promote LiNi<SUB>1−x</SUB>Mn<SUB>x</SUB>PO<SUB>4</SUB> as a suitable cathode material for high voltage LIBs.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Carbon free, LiNiPO<SUB>4</SUB> and Mn doped LiNiPO<SUB>4</SUB> were prepared by a polyol process. </LI> <LI> The Mn doped LiNiPO<SUB>4</SUB> shows the improved electrical performances. </LI> <LI> The CV polarization curve was ascertained in the voltage range of 2.8–5.6 V. </LI> <LI> The cell delivers a maximum discharge capacity of 94.2 mA h g<SUP>−1</SUP> at 0.1 C rate. </LI> </UL> </P>
Amosedinakaran S.,Mala K.,Bhuvanesh A.,Kannan S.,Karuppasamy Pandiyan M. 대한전기학회 2021 Journal of Electrical Engineering & Technology Vol.16 No.6
A power system planning must involve the Electricity demand forecasting (EDF) and Generation expansion planning (GEP) for better operation. The optimal plan should consider both qualitative and quantitative factors such as error, cost and reliability of the power system. In this study, EDF and GEP problem have been solved till the year 2030 for Tamil Nadu, an Indian state. The formulation of EDF problem has been modeled based on the input variables such as population, Gross State domestic product (GSDP) and per capita income, and has been solved using Genetic algorithm (GA), Artifi cial immune system (AIS) and Diff erential evolution (DE). While analyzing the results of EDF problem, DE provides optimal result with Minimum mean absolute percentage error (MAPE). Continually, short term (6-year) and long term (12-year) GEP problem have been solved using DE by considering minimization of cost and environmental eff ects as the main objectives. To achieve these objectives, Renewable Energy Sources (RES) have been integrated in diff erent penetration levels such as 0–10%, 10–20%, 20–30%, 30–40%, and 40–50% on GEP problem and its impacts have been investigated. The results of DE have been validated with Dynamic Programing (DP). The outcomes of the study have assisted the power system planners while decision making in introducing Renewable Energy Sources (RES) on a real-world power system.
Anti-diabetic Effect of the Soybean Extract Fermented by Bacillus subtilis MORI in db/db Mice
남하진,정혜리,S. Karuppasamy,박영식,조용석,이재연,성수일,서준교 한국식품과학회 2012 Food Science and Biotechnology Vol.21 No.6
This study investigated the effects of soy bean extract fermented by Bacillus subtilis MORI (BTD-1) on blood glucose, hemoglobin A1c (HbA1c), plasma insulin,and pancreatic β islets in db/db mice. The BTD-1 (500 mg/kg) group showed significantly lower fasting blood glucose level (p<0.01) and postprandial 2 h blood glucose level (p<0.01) compared with the db control group. The BTD-1 (500 mg/kg) group showed significantly lower HbA1c level compared with the db control group (p<0.01). After 8 weeks of BTD-1 administration, the pancreatic islet architecture was preserved and the immunofluorescent intensities of insulin in BTD-1 (500mg/kg) group apparently increased compared to in the db control group. Plasma insulin levels were found to be significantly higher in the BTD-1 (500 mg/kg) group than in the db control group (p<0.05). In summary, our results suggest that BTD-1 has an anti-diabetes effect in a non-insulin dependent diabetes mellitus mouse model.
Krishnan Venkatesh,Balamurugan Muthukutty,Shen-Ming Chen,Periyakaruppan Karuppasamy,Ahmed S. Haidyrah,Chelladurai Karuppiah,Chun-Chen Yang,Sayee Kannan Ramaraj 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.106 No.-
This work focussed on the fabrication of synergetic spinel CoMn2O4 embedded reduced graphene oxide(CoMn2O4@RGO) nanocomposite over the surface of modified screen-printed carbon electrode (SPCE) forhighly sensitive and enhanced electrochemical detection of metol (MTL) in 0.05 M phosphate buffer electrolyte. The CoMn2O4@RGO nanocomposite material was synthesized by sonochemical method and wellcharacterizedusing various spectral and analytical (XRD, TGA, Raman spectroscopic, FE-SEM, HR-TEM &EA) techniques. Cyclic and differential pulse voltammetry techniques were used for the detection of MTLat CoMn2O4@RGO modified SPCE. The present electrochemical sensor shows a dynamic linear responserange from 0.01 to 137.65 mM and the detection limit, quantification, sensitivity were estimated to be0.050 mM, 1.64 mM, and 3.77 mA mM1 cm2. Furthermore, the proposed MTL sensor was exhibited numerousadvantages including very ease fabrication, high selectivity, stability, and reproducibility for thedetection of MTL. Based on the obtained experimental data a plausible MTL redox mechanism was proposed. In addition, the present electrochemical sensor was applied in real sample analysis at the spikedsamples (lake water samples + MTL) observed with good recovery results.