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Selvakumar J.,Paavaai Group of Institutions | Mohangift M.D.,Panimalar Engineering College | Johnalexis S.,Kumaraguru College of Technology
International Journal of Applied Engineering Research | Year: 2015

The description of fatigue curve is complecated beause its probablisticin nature. the calculations are made by gatts equations in both known and unknown endurance limits. by using sucessive approximations at two stress levels and three stress levels the endurance limit of material is correleted with experimental life. the s-n predictions are more closer in three stress level approach. EIFS method is one of the efficent mode to predict the fatigue life but it depends on probablistic crack growth. © Research India Publications. Source


Jegatheesan A.,Paavaai Group of Institutions | Rajarajan G.,Selvam Educational Institutions
International Journal of ChemTech Research | Year: 2015

Single crystals of the Glycine Fumarate (GFA) were from the aqueous solution by slow evaporation method at room temperature. Single crystal X ray diffraction analysis reveals that the crystal belongs to orthorhombic crystal system. Optical transmission studies show that the crystal is transparent in the entire visible region with cut off wave length 252 nm .The optical band gap is found to be 3.872 eV. Mechanical hardness studies carried out to find the Hardness number of the grown crystal and it is increase with increase in applied load. Mayer index number was calculated for the grown up crystal and found that the materials belongs to the soft material category. Dielectric constant and the dielectric loss of material were calculated by using dielectric analysis at the room temperature. Further, electrical properties, such as Plasma energy, Penn energy, Fermi energy and electronic polarizability of the growth crystals have been predicated. The optical second harmonic generation conversion efficiency of GFA was determined by Kuntz powder technique and it shows that the material is the potential candidate for the NLO applications and its efficiency found to be 0.2 times that of KDP. © 2015, Sphinx Knowledge House. All rights reserved. Source


Kumaravel S.T.,Paavaai Group of Institutions | Murugesan A.,KS Rangasamy College of Technology | Kumaravel A.,KS Rangasamy College of Technology
Renewable and Sustainable Energy Reviews | Year: 2016

Alternative fuels for diesel engines have become vital due to increase in energy expenditure, stringent norms of emission, depletion of fossil fuels and fluctuating cost of the petroleum products in India. To overcfome this problem, it is very important to find alternative fuels. The main focus of this review is to shed light on the importance of tyre pyrolysis oil as an alternative fuel for diesel engines. In this context, tyre pyrolysis oil has recently been receiving renewed interest. In this review, the pyrolysis mechanism, pyrolysis reactors, their product yield, characteristic analysis of tyre such as proximate analysis, elemental analysis and pyrolysis process are discussed. Pyrolysis of scrap tyre starts at 250°C and gets completed at 550°C. The presence of a catalyst produces lighter oil with drastic increase in the concentration of single ring aromatics. Engine performance, emissions and combustion parameters, such as the heat release rate and maximum rate of pressure rise, when engines are operated on a tyre pyrolysis oil were also discussed. NO(x), HC, CO, and smoke emissions were found to be higher at higher loads due to the high aromatic content and longer ignition delay. The ignition delays were longer than those with DF. It is concluded that it is possible to use tyre pyrolysis oil in diesel engines as an alternate fuel. © 2016 Elsevier Ltd. All rights reserved. Source


Anbarasu K.,TRP Engineering College | Geetha N.,Paavaai Group of Institutions
Rasayan Journal of Chemistry | Year: 2015

In modern aspects, the heterocyclic ring systems are playing a very important role in pharmaceutical drug synthesis. The present study was aimed to synthesis and evaluates the pharmacological potential of heterocyclic compound such as chromium (VI) compound. Microbiological potential of the prepared compound quinoxalinium dichromate (QxDC) was evaluated by disc diffusion method. Based on the results, we found that compound QxDC having significant potential against the selected organisms. The spectral characterization also revealed that the synthesized compound has heterocyclic ring system. © 2015 RASAYAN. All rights reserved. Source


Jegatheesan A.,Paavaai Group of Institutions | Aroulmoji V.,Mahendra Engineering College | Rajarajan G.,Selvam Educational Institutions
Asian Journal of Chemistry | Year: 2014

The studies on the growth and characterization of a new semi-organic non-linear optical crystal, L-asparagine potassium dihydrogen phosphate have been successfully carried out by slow evaporation technique using deionized water as a solvent. The grown crystal is characterized by powder X-ray diffraction analysis and FT-IR analysis. The results of X-ray diffraction analysis showed that it possess orthogonal structure having lattice parameters a = 5.582 A, b = 9.812 A and c = 11.796 A, a = b = g = 90° and V = 514 A3. The fourier transform infrared spectroscopy of L-asparagine potassium dihydrogen phosphate crystal were recorded between wave-number 4000 to 400 cm-1 showed very weak bands appearing around 1232 and 1147 cm-1 are due to P-O-H stretching and bending. The observed broad intense band in 3385-3119 cm-1 region is assigned to NH stretch of NH2 vibration of L-asparagine potassium dihydrogen phosphate molecule. The CH2 vibration of the amino acid shows its peak at 2945 cm-1. The combination band observed at 2149 cm-1 is due to asymmetric NH3 + vibration at 1643 cm-1 and NH2 + tensional oscillation at 512 cm-1 and optical transmission spectral analysis. The lower cut off wavelength of L-asparagine potassium dihydrogen phosphate crystal occurs at 198 nm and it reveals that the material has good optical transparency in the entire visible region. The results of hardness test showed that the presence of dopant has enhanced the mechanical strength of the L-asparagine potassium dihydrogen phosphate crystals and the second harmonic generation of L-asparagine potassium dihydrogen phosphate crystals was tested using Kurtz and Perry method also showed good results. Source

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