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Bakkiyaraj S.,Veltech Drrr And Drsr Technical University
International Journal of Pharma and Bio Sciences | Year: 2011

Indian Medicinal plants contain many antimicrobial agents and properties. Hence, an attempt has been made to find out newer components from the Indian Medicinal plants Natural antimicrobials can be derived from plants, animal tissues, or microorganisms. The shortcomings of the drugs available today, propel the discovery of new pharmacytherapeutic agents in medicinal plants. To determine the potential and promote the use of herbal medicine, in the present study of aqueous and ethanoloic extract of 5 medicinal plant tested leaves of Azadirachta indica (Meliaceae), Portulaca oleracea (Portulacaceae), Euphorbia hirta (Euphorbiaceae), Gmelina asiatica (Verbenaceae), Santalum album((Santalaceae), were screened for their anti-microbial activity against seven species of micro organism Escherichia coli,, Bacillus subtilis,, Pseudomonas aeruginosa, Salmonella typhimurium, Staphylococcus aureus, Candida albicans and Aspergillus Niger. The susceptibility of the microorganisms to the extracts of these plants was compared with each other and with selected antibiotics. The antimicrobial activities of these plants were discussed according to their phytochemical components. Source


Padmanabha S.K.,Veltech Drrr And Drsr Technical University | Rao S.V.,Sri Krishnadevaraya University
Rasayan Journal of Chemistry | Year: 2011

The reagent 4-Hydroxy benzaldehyde thiosemicarbazone (4-HBTS) has been synthesized and characterized and its analytical applications were investigated. The reagent 4-HBTS reacts with aqueous solution of Bi(III) ion in the pH range of 5.5-6.5 at room temperature and forms a green coloured 1:2 [Bi(II):4-HBTS] complex with stability constant 2.04×10 11. The complex has maximum absorption at 356 nm. The molar absorptivity and sandell's sensitivity for the coloured solution are found to be 1.3×10 4 M -1 cm -1 and 0.016075 μg cm -2 respectively. Beer's law is obeyed in the range of 0.835-8.359 μg/mL. The interference of various diverse ions has been studied. The procedure was successfully applied to the determination of bismuth in water, industrial waste water samples and also in different alloy samples. © 2011 RASĀYAN. All rights reserved. Source


Ravichandran S.,Veltech Drrr And Drsr Technical University | Murugesan C.,Jaya Engineering College
International Journal of ChemTech Research | Year: 2015

Neutral complexes of Cu(II), Co(II), Ni(II) and Zn(II) have been synthesized from a new Mannich base, N-[1-morpholino(4-diphenylaminobenzyl)]acetamide (MDABA) derived by the condensation of morpholine, 4-diphenylaminobenzaldehyde and acetamide. The ligand forms 1:1 (metal:ligand) type of complexes with Cu(II), Co(II), Ni(II) and Zn(II) metal salts. The structural features have been arrived from their microanalytical, IR, UV-Vis.,1H-NMR, CV, EPR spectral data. The electrolytic behavior of the chelate was assessed from their molar conductance data. The magnetic susceptibility measurements suggested that all the complexes were paramagnetic except Ni and Zn, which were diamagnetic, and the magnitude of magnetic moment values were useful to find out the number of unpaired electrons which in turn were useful to further support the geometry suggested by electronic spectral data. The magnetic susceptibility and electronic absorption spectra of copper complex indicates an octahedral geometry around the central metal ion while cobalt, zinc complexes exhibit tetrahedral geometry and nickel complex shows square-planar structure. The electrochemical behaviour, the anodic and cathodic potential and the number of electron transfer were calculated using cyclic voltammogram. The cyclic voltammogram of copper complex in MeCN solution at 298 K was studied. The X-band EPR spectra of copper complex in DMSO at 300 K and 77 K were recorded and their salient features are discussed. The antimicrobial activity of the ligand and its complexes has been extensively studied on microorganisms such as Staphylococcus aureus, Bacillus subtilis, Escherichia coli and Pseudomonas aeruginosa by well-diffusion technique using DMSO as solvent. The values of zone of inhibition were found out at 37°C for a period of 24 h. It has been found that all the complexes have higher activity than the free ligand and the standard. © 2015, Sphinx Knowledge House. All rights reserved. Source


Dhal P.K.,Veltech Drrr And Drsr Technical University | Ranjan C.C.A.,Pondicherry Engineering College
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2013

This paper is proposed a neural controller for static time critical error and better damping oscillations after a short circuit fault is cleared. The neural network is approached for estimation of the control and operating parameters of STATCOM .It is used for improving voltage profile in power system. So STATCOM is an important voltage source converter device. It is used in voltage control mode or reactive power injection mode. To achieve this idea, a controller is designed based on energy function lyapunov. The neural controller is employed to the system for enhancement the transient stability. The performance is analyzed using MATLAB/SIMULINK. © 2013 Springer International Publishing. Source


Ravichandran S.,Veltech Drrr And Drsr Technical University
International Journal of ChemTech Research | Year: 2014

Neutral complexes of Cu(II), Co(II), Ni(II) and Zn(II) have been synthesised from a new Mannich base, N-[1-morpholino(4-nitrobenzyl)]acetamide (MNBA) derived by the condensation of morpholine, 4-nitrobenzaldehyde and acetamide. The ligand forms 1:1 (metal:ligand) type of complexes with Cu(II), Co(II), Ni(II) and Zn(II) metal salts. The structural features have been arrived from their microanalytical, IR, UV-Vis., CV, EPR spectral data. The electrolytic behaviour of the chelates was assessed from their molar conductance data. The magnetic susceptibility measurements suggested that all the complexes were paramagnetic except Ni and Zn, which were diamagnetic, and the magnitude of magnetic moment values were useful to find out the number of unpaired electrons which in turn were useful to further support the geometry suggested by electronic spectral data. The magnetic susceptibility and electronic absorption spectra of copper complex indicates an octahedral geometry around the central metal ion while cobalt, zinc complexes exhibit tetrahedral geometry and nickel complex shows square-planar structure. The electrochemical behaviour, the anodic and cathodic potential and the number of electron transfer were calculated using cyclic voltammogram. The cyclic voltammogram of copper complex in MeCN solution at 298 K was studied. The X-band EPR spectra of copper complex in DMSO at 300 K and 77 K were recorded and their salient features are discussed. The antimicrobial activity of the ligand and its complexes has been extensively studied on microorganisms such as Staphylococcus aureus, Bacillus subtilis, Escherichia coli and Pseudomonas aeruginosa by well-diffusion technique using DMSO as solvent. The values of zone of inhibition were found out at 370C for a period of 24 h. It has been found that all the complexes have higher activity than the free ligand and the standard. © 2015, Sphinx Knowledge House. All rights reserved. Source

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