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Senthilnathan V.,Kumaraguru College of Technology | Ganesan S.,Government College of Technology, Coimbatore
Journal of Renewable and Sustainable Energy | Year: 2010

In the area of photovoltaic, the silicon solar cell is the most popular and it has issues such as stability and scaling up cost. On the other hand, a dye-sensitized solar cell (DSSC) is one of the most promising candidates for a high-performance solar cell in the next generation, since it is fabricated by a simple manufacture process at relatively low cost. The focus of interest in this research paper is to mention the usage of maiden single and simple apparatus of spray pyrolysis thin film deposition to fabricate the electrode and counterelectrode for DSSC. It involves the novelties introduced in the instrumentation of the apparatus and the characterizations (x-ray diffraction, scanning electron microscope, and atomic force microscopy) of the prepared thin films for the fabricated DSSC. In this work, the pomegranate fruit dye is used to sensitize the nano- TiO2. © 2010 American Institute of Physics.

Prakash C.,Salem College | Ramakrishnan G.,Kumaraguru College of Technology
International Journal of Thermophysics | Year: 2013

The effect of the linear density, loop length, and blend proportion on thermal comfort properties (air permeability, thermal conductivity, thermal resistance, and water-vapor permeability) have been studied. Cotton, bamboo fiber, and blends of the two fibers (100 % cotton, 50:50 % bamboo/cotton, 100 % bamboo) were spun into yarns of linear densities (20s,; 25 s, 30s Ne). Each of the yarns so produced was converted to single jersey knitted fabrics with three loop lengths. The thermal conductivity of the fabrics was generally found to decrease with an increase in the proportion of bamboo fiber. The water-vapor permeability and air permeability of the fabrics were observed to increase with an increase in bamboo fiber content. An increasing presence of bamboo fiber in the fabric causes a reduction in the fabric thickness and mass per unit area for all linear densities of yarn. As the constituent yarn gets finer, both the fabric air and water-vapor permeability increase while the thermal conductivity decreases. © 2013 Springer Science+Business Media New York.

Shanmugaprakash M.,Kumaraguru College of Technology | Sivakumar V.,Kongu Engineering College
Bioresource Technology | Year: 2013

In the present work, the evaluation capacities of two optimization methodologies such as RSM and ANN were employed and compared for predication of Cr(VI) uptake rate using defatted pongamia oil cake (DPOC) in both batch and column mode. The influence of operating parameters was investigated through a central composite design (CCD) of RSM using Design Expert software. The same data was fed as input in ANN to obtain a trained the multilayer feed-forward networks back-propagation algorithm using MATLAB. The performance of the developed ANN models were compared with RSM mathematical models for Cr(VI) uptake rate in terms of the coefficient of determination (R2), root mean square error (RMSE) and absolute average deviation (AAD). The estimated values confirm that ANN predominates RSM representing the superiority of a trained ANN models over RSM models in order to capture the non-linear behavior of the given system. © 2013 Elsevier Ltd.

Rao J.S.,Kumaraguru College of Technology
Mechanism and Machine Theory | Year: 2015

This paper is written in honor of Professor Dr. F. R. Erskine Crossley, Professor Emeritus, Architect and Founder Member of the International Federation for Promotion of Theory of Mechanisms and Machines (IFToMM) and its first Vice President on his achieving 100 years of age on 21st July 2015 with glorious service to Kinematics and Kinetics Community of the world. This paper deals with two parts viz., 1. My association with him in the 1960's during the formation of IFToMM and 2. Kinematics and Kinetics, the way this subject is developed in the second half of the 20th century and practiced today; a subject matter very close to Professor Crossley's heart. © 2014 Elsevier Ltd. All rights reserved.

Ramyaa P.,Bharathiar University | Krishnaswamy R.,Kumaraguru College of Technology | Padma V.V.,Bharathiar University
Biochimica et Biophysica Acta - General Subjects | Year: 2014

Background Ochratoxin A (OTA), a mycotoxin, causes extensive cell damage, affecting liver and kidney cells. OTA toxicity is fairly well characterized where oxidative stress is believed to play a role, however, the sequence of molecular events after OTA-exposure, have not been characterized in literature. Further, antidotes for alleviating the toxicity are sparsely reported. The aim of this study was to understand the sequence of some molecular mechanisms for OTA-induced toxicity and the cytoprotective effect of quercetin on OTA-induced toxicity. Methods Time course studies to evaluate the time of intracellular calcium release and ROS induction were carried out. The time of activation and induction of two key redox- sensitive transcription factors, NF-κB and Nrf-2 were determined by nuclear localization and expression respectively. The time of expression of inflammatory marker COX-2 was determined. Oxidative DNA damage by comet assay and micronucleus formation was studied. The ameliorative effect of quercetin on OTA-induced toxicity was also determined on all the above-mentioned parameters. Results OTA-induced calcium release, ROS generation and activated NF-κB nuclear translocation and expression. Pre-treatment with quercetin ameliorated ROS and calcium release as well as NF-κB induction and expression. Quercetin induced Nrf-2 nuclear translocation and expression. Quercetin's anti-inflammatory property was exhibited as it down regulated COX-2. Anti-genotoxic effect of quercetin was evident in prevention of DNA damage and micronucleus formation. Conclusion Quercetin modulated OTA-induced oxidative stress and redox-signaling in HepG2 cells. General significance The results of the study demonstrate for the first time that quercetin prevents OTA-induced toxicity in HepG2 cells. © 2013 Elsevier B.V.

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