Professional Group of Institutions

Tiruppur, India

Professional Group of Institutions

Tiruppur, India
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Kavitha T.,Professional Group of Institutions | Haider S.,King Saud University | Kamal T.,King Abdulaziz University | Ul-Islam M.,Dhofar University
Journal of Alloys and Compounds | Year: 2017

Current study was aimed to synthesize cobaltosic oxide nanoparticles (Co3O4NPs) through a novel synthetic route and investigate its antibacterial activity along with possible action mechanism against Escherichia coli (E.coli), a gram negative bacterium were investigated. The Co3O4NPs synthesized by one-step residue free in-situ thermal decomposition method and its structure and morphology were examined. Co3O4 NPs were found to be highly efficient in killing E. coli indicating about 99% reduction in cell growth. The cell wall deterioration was directly evidenced by field emission scanning electron microscopy. The potent antibacterial activity of Co3O4 NPs were found to be due to the electrostatic attraction between bacterial cell wall and Co3O4NPs and further reactive oxygen species production by Co3O4 NPs which in turn leads to intracellular oxidative stress as manifested by zeta potential, electron spin resonance and dichlorofluorofluorescein-diacetate assay. The cytotoxicity of Co3O4NPs were studied against fibroblast cells. These results altogether bestow the potential for developing Co3O4NPs based materials with bactericidal properties and biocompatibility for environmental applications. © 2017 Elsevier B.V.

Philip Selvaraj D.,Karunya University | Chandramohan P.,Professional Group of Institutions
Measurement: Journal of the International Measurement Confederation | Year: 2014

In this work, the dry turning parameters of two different grades of nitrogen alloyed duplex stainless steel are optimized by using Taguchi method. The turning operations were carried out with TiC and TiCN coated carbide cutting tool inserts. The experiments were conducted at three different cutting speeds (80, 100 and 120 m/min) with three different feed rates (0.04, 0.08 and 0.12 mm/rev) and a constant depth of cut (0.5 mm). The cutting parameters are optimized using signal to noise ratio and the analysis of variance. The effects of cutting speed and feed rate on surface roughness, cutting force and tool wear were analyzed. The results revealed that the feed rate is the more significant parameter influencing the surface roughness and cutting force. The cutting speed was identified as the more significant parameter influencing the tool wear. Tool wear was analyzed using scanning electron microscope image. The confirmation tests are carried out at optimum cutting conditions. The results at optimum cutting condition are predicted using estimated signal to noise ratio equation. The predicted results are found to be closer to experimental results within 8% deviations. © 2013 Elsevier B.V. All rights reserved.

Chandrasekar P.,Professional Group of Institutions | Chandramohan P.,Professional Group of Institutions | Mohanraj M.,Information Institute of Engineering
Materials Characterization | Year: 2012

In this work, a detailed characterisation of titanium-titanium boride composites processed by three powder metallurgy techniques, namely, hot isostatic pressing, spark plasma sintering and vacuum sintering, was conducted. Two composites with different volume percents of titanium boride reinforcement were used for the investigation. One was titanium with 20% titanium boride, and the other was titanium with 40% titanium boride (by volume). Characterisation was performed using X-ray diffraction, electron probe micro analysis - energy dispersive spectroscopy and wavelength dispersive spectroscopy, image analysis and scanning electron microscopy. The characterisation results confirm the completion of the titanium boride reaction. The results reveal the presence of titanium boride reinforcement in different morphologies such as needle-shaped whiskers, short agglomerated whiskers and fine plates. The paper also discusses how mechanical properties such as microhardness, elastic modulus and Poisson's ratio are influenced by the processing techniques as well as the volume fraction of the titanium boride reinforcement. © 2012 Elsevier Inc.

Thilagavathy P.,Professional Group of Institutions | Santhi T.,Karpagam University
BioResources | Year: 2014

In this work, sustainable and biodegradable Acacia nilotica leaf (AN) was chemically modified to remove Cu(II) from aqueous solutions, which is considered a versatile approach to clean contaminated aquatic environments. Zinc chloride-modified Acacia nilotica leaf (ZAN) was characterized by scanning electron microscopy (SEM) and other physico-chemical parameters like pHZPC. The aim was to assess the efficiency and mechanism of adsorption on Acacia nilotica via isotherm models (Langmuir, Freundlich, Temkin, Dubinin-Radushkevich, Harkin-Jura, and Frenkel-Halsey-Hill), kinetic models, and thermodynamic parameters. To optimize the removal efficiency, parameters such as effect of initial concentration, effect of pH, dosage, initial concentration, and contact time were studied by batch and column methods. Desorption studies illustrated that about 73% of the metal ions could be removed using 0.2N HCl. The results of the present investigation indicated that ZAN has a high potential for the removal of Cu(II) from aqueous solutions, and the resultant data can serve as a base line for designing treatment plants on an industrial scale.

Thilagavathy P.,Professional Group of Institutions | Santhi T.,Karpagam University
Chinese Journal of Chemical Engineering | Year: 2014

The removal of cobalt ion from aqueous solution by Acacia nilotica leaf carbon (HAN), is described. Effect of pH, agitation time and initial concentration on adsorption capacities of HAN was investigated in a batch mode. The adsorption process, which is pH dependent, shows maximum removal of cobalt in the pH range 5 for an initial cobalt concentration of 50mg·L-1 The experimental data have been analyzed by using the Freundlich, Langmuir, Temkin and Dubinin-Radushkevich isotherm models. The batch sorption kinetics have been tested for a pseudo-first order, pseudo-second order and Elovich kinetic models. The rate constants of adsorption for all these kinetic models have been calculated. Results showed that the intraparticle diffusion and initial sorption of Co(II) into HAN was themain rate limiting step. The adsorption of cobalt ion was confirmed through instrumental analyses such as scanning electron microscope (SEM) and Fourier transform infrared spectroscopy (FTIR). The desorption and recycling ability of HAN were also found. We conclude that HAN can be used for the efficient removal of cobalt from aqueous solution. © 2014 The Chemical Industry and Engineering Society of China, and Chemical Industry Press. All rights reserved.

Thilagavathy P.,Professional Group of Institutions | Santhi T.,Karpagam University
BioResources | Year: 2013

The use of cheap and eco-friendly adsorbents prepared from freely and abundantly available Acacia nilotica leaves for the removal of highly toxic Cr(VI) from aqueous solutions in single and binary ion solutions as well as from a mixture of it with Co(II) & Cu(II) was investigated by batch methods. The effects of pH, contact time, and initial metal ion concentration of Cr(VI) onto H2SO4-treated Acacia nilotica leaves (HAN) was investigated. The linear form of the Freundlich model achieved high coefficients of determination R2 = 0.9808 for Cr(VI) adsorption. The R2 values for fitting the adsorption rate data were greater than 0.983 for Cr(VI) ion, which indicates the applicability of pseudo-second-order kinetic model. The desorption and recycling ability of Cr(VI) and HAN were found to be good. The studies showed that this low-cost adsorbent could be used as an efficient adsorbent material for the removal of Cr(VI) from aqueous solutions.

Sharanya V.,Professional Group of Institutions | Prasanalakshmi B.,Professional Group of Institutions
International Journal of Control Theory and Applications | Year: 2016

Wireless sensing element primarily based on management has drawn attention in many industries attributable to the reduced value, straightforward quality, maintenance, power management etc. Wireless sensing element based systems are deployed in industries, army and in family applications for varied applications like observation, maintenance, security etc. during this system, the utilization of wireless sensing element technology (Bluetooth) for energy conservation is projected, during which the sensing element area unit deployed to sense. And to watch the environmental conditions and take selections supported the inputs from the varied sensors. In addition we tend to implement the system of electrical power consumption analysis module during this system to prove its potency. © International Science Press.

Nagasubramaniam K.,TTJ Design and Engg Ltd | Chandramohan P.,Professional Group of Institutions
Journal of Engineering Science and Technology | Year: 2014

Pressure/velocity remains as main factors in a high pressure die casting machine to produce intricate components from the die. Rejection analysis was carried out in a die casting machine used in producing Aluminum components with a higher rejection rate. Three modifications have been carried out in the basic hydraulic design of the machine to increase the efficiency and in turn reduce the rejection of the components. The three modifications include (i) addition of nitrogen bottle to the system design (ii) Reducing the passage diameter of the Intensifier output (iii) Regeneration of Intensifier output. The first modification resulted with increase in pressure and the second with increase in velocity and finally the third one with optimum increase in both pressure and velocity. This has resulted in the improvement of machine efficiency thereby reducing the overall rejection of the components with intricate design. © School of Engineering, Taylor’s University.

Suresh N.,Coimbatore Institute of Technology | Chandrasekar P.,Professional Group of Institutions
Applied Mechanics and Materials | Year: 2014

The challenging problems for designers and engineers in the material science are to enhance the quality of the castings. The several numbers of methods using external forces have been applied to introduce fluid flow during solidification of molten metal in casting process. These include mechanical, electromagnetic and ultrasonic vibration. Many technical journals describe the improvement in mechanical properties of castings under the vibration during solidification. In this paper, an attempt has been made to review the casting process to refine the microstructure of cast product. The awareness gain of these processes and application of the procedures offer the scope for better cost savings in design and manufacturing of cast products. © (2014) Trans Tech Publications, Switzerland.

Gopal C.,Information Institute of Engineering | Mohanraj M.,Information Institute of Engineering | Chandramohan P.,Professional Group of Institutions | Chandrasekar P.,Professional Group of Institutions
Renewable and Sustainable Energy Reviews | Year: 2013

The research developments with renewable energy source water pumping systems (RESWPSs) are reviewed in this paper. The reported investigations are categorized into five major groups as follows: (i) solar photovoltaic water pumping systems (SPWPSs), (ii) solar thermal water pumping systems (STWPSs), (iii) wind energy water pumping systems (WEWPSs), (iv) biomass water pumping systems (BWPSs) and (v) hybrid renewable energy water pumping systems (HREWPSs). More than a hundred published articles related to RESWPSs are briefly reviewed. Additionally, the limitations with RESWPSs and further research needs are described. This paper concludes that renewable energy sources (RESs) play a vital role in reducing the consumption of conventional energy sources and its environmental impacts for water pumping applications. © 2013 Elsevier Ltd.

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