Tiruchirappalli, India
Tiruchirappalli, India

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Ramadoss G.,Shivani Institute of Technology | Senthilkumar C.,Annamalai UniversityTamilnadu | Boopathi R.,Sathyabama University
International Journal of Applied Engineering Research | Year: 2014

Non conventional machining is increasing in importance due to some of the specific advantages, which can be demoralized during machining operation. Electrical Discharge Machining (EDM) appears to be a positive technique, since in many areas of application, it offers several unique advantages including superior machining rate, enhanced precision and control, and a wider variety of materials that can be machined. Therefore the present research is initiated to investigate the influence of some of the predominant electrical discharge process parameters such as current, pulse ON-time, flushing pressure and vibration on the metal removal rate (MRR) and tool wear rate (TWR) to fulfill the effective utilization of electrical discharge machining of 6061Al/TiB2 composites produced through in-situ casting technique. The Response Surface Methodology (RSM) is used to identify the most influential parameters and also to establish a comprehensive statistical model for correlating the interactive and higher-order influences of various machining parameters. © Research India Publications.

Devi T.U.,Government Arts College for Women | Kalpana G.,Shivani Institute of Technology | Priya S.,Cauvery College for Women | Ravikumar K.,Indian Institute of Chemical Technology | Selvanayagam S.,Kalasalingam University
Acta Crystallographica Section E: Structure Reports Online | Year: 2012

In the title compound, C9H13N2O +·Cl-, the cation, apart from the methyl groups, is almost planar, with a maximum deviation of 0.040 (1) Å; the methyl C atoms deviate by 0.389 (2) and -1.247 (1) Å, from the mean plane. In the crystal, cations and anions associate through C - H⋯Cl hydrogen bonds, forming a helical arrangement. In addition, intramolecular O - H⋯Cl, N - H⋯Cl and C - H⋯N interactions are observed.

Devi T.U.,Government Arts College for Women | Priya S.,Cauvery College for Women | Kalpana G.,Shivani Institute of Technology | Selvanayagam S.,Kalasalingam University | Sridhar B.,Indian Institute of Chemical Technology
Acta Crystallographica Section E: Structure Reports Online | Year: 2012

In the title compound, C15H10O5, the cyclo-penta-none (r.m.s. deviation = 0.049 Å) and oxolane (r.m.s. deviation = 0.048 Å) rings make a dihedral angle of 67.91 (4)°. An intra-molecular O - H⋯O hydrogen bond is observed. In the crystal, molecules associate via O - H⋯O hydrogen bonds, forming a three-dimensional network. © Devi et al. 2012.

Purushothaman M.,Jamal Mohamed College Autonomous | Loganathan K.,Jamal Mohamed College Autonomous | Ali K.M.S.,Shivani Institute of Technology | Selvin J.A.,Pondicherry University
International Journal of ChemTech Research | Year: 2014

In the present investigation, a new class of coumarins viz. iminocyanocoumarins, cyanocoumarins and iminocoumarin carboxamides has been accomplished in good to excellent yields in short reaction time under water/methanol medium. The present protocol involving mild reaction condition, good to excellent yield and simple reaction procedure was found to be the best synthetic strategy for coumarin derivatives in view of environmentally benign consciousness. In vitro antimicrobial activity of all synthesized compounds has been evaluated against five strains of bacteria and two fungi and some of them showed their potent activity.

Purushothaman M.,Jamal Mohamed College | Loganathan K.,Jamal Mohamed College | Sithick Ali K.,Shivani Institute of Technology
International Journal of ChemTech Research | Year: 2012

Synthesis of 4, 6-bis[2′-amino-3′-cyano-4′-(substituted phenyl)-6′-pyridyl] resorcinol derivatives were achieved from the mixture of bichalcones, malononitrile and ammonium acetate following Knoevenagel reaction and Michael addition. The structures of the synthesized compounds were characterized by IR, 1HNMR, 13CNMR, mass spectral data and elemental analysis. The compounds (III a-h) were screened for their in vitro activity against Psedomonas, Bacillus sp., Streptococcus, Staphylococcus, E.coli, C.albicans, and A.niger. All the compounds were found to possess significant activities against the bacteria and fungi chosen at optimum concentration. The antifeedant activity of the compounds IIIb, IIIe and IIIg has been found to possess very high.

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