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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.


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.


Senthil Kumar S.,Veltech Drrr And Drsr Technical University
2011 International Conference on Computer, Communication and Electrical Technology, ICCCET 2011 | Year: 2011

The embedded based applications need sensitive data transfer between different nodes. In order to increase the speed and to reduce the hardware complexity, this proposed system focuses on the light weight security algorithm Tiny Encryption Algorithm TEA which can be implemented in microcontroller to adapt with many real time constraints such as memory, data loss and low cost. The additive feature of this proposed system is that it uses Key Generation Unit (KGU) to produce the random key to make it optimal for sensitive data transfer in many real-time applications. This above work uses microcontroller and the performances of this cryptosystem is analyzed by implementing the cryptographic algorithm TEA with key generation unit. The key generation unit uses the timers in microcontroller to generate the random bits. The work extends with implementing the two different modes of communication serial (UART) and wireless transmission (RF) to transfer the data from encryption unit to decryption unit. © 2011 IEEE.


Ravichandran S.,Veltech Drrr And Drsr Technical University
International Journal of ChemTech Research | Year: 2015

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)]benzamide (MNBB) derived by the condensation of morpholine, 4- nitrobenzaldehyde and benzamide. 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 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. © 2014, Sphinx Knowledge House. All rights reserved.


Hari Kumar K.,SRM University | Sekar P.,Ckandaswami Naidu College | Ramanarayanan R.,Veltech Drrr And Drsr Technical University
International Journal of Applied Engineering Research | Year: 2015

The machine attended by a manpower system has two phases. In phase 1 it has exponential life time distribution with parameter λ1.If it has not failed in an exponential random time with parameter μ1, it moves to phase 2. In phase 2 it has failure time distribution which is an exponential with parameter λ2.If it does not fail in an exponential time with parameter μ2, it moves to phase 1 and so on it oscillates between phase 1 and phase 2 till it fails. The manpower system is also exposed to a failure process. The entire system fails when both of them are in failed state. During the operation time, the system produces products for sale. When the system fails, the recruitments, the repairs and the sales are attended. We study two models. In Model-I, the vacancies caused by departure of employees are filled up one by one and in Model-II, when the operation time is more than a threshold time, the recruitments are done all together and when the operation time is less than the threshold time, the recruitments are done one by one. Joint Laplace transform of the pdf of the operation time, the repair time of the machine, the recruitment time and the sales time, their expectations and the covariance of operation time and recruitment time are presented with numerical illustrations. © Research India Publications.


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.


Prakash N.,Sri Chandrasekharendra Saraswathi Viswa Mahavidyalaya | Sudha P.N.,P.A. College | Renganathan N.G.,Veltech Drrr And Drsr Technical University
Environmental Science and Pollution Research | Year: 2012

Purpose: Chitosan with nylon 6 membranes was evaluated as adsorbents to remove copper and cadmium ions from synthetic industrial wastewater. Methods: Chitosan and nylon 6 with glutaraldehyde blend ratio with (1:1+Glu, 1:2+Glu, and 2:1+Glu) have been prepared and these were used as membranes to remove copper and cadmium ions from synthetic industrial wastewater. Characterization of the synthesized membrane has been done with FTIR, XRD, TGA/DTA, DSC, and SEM. Chemical parameters for quantities of adsorption of heavy metal contamination have been done and the kinetics of adsorption has also been carried out. Results: The optimal pH for the removal of Cd(II) and Cu(II) using chitosan with nylon 6. Maximum removal of the metals was observed at pH 5 for both the metals. The effect of adsorbent dose also has a pronounced effect on the percentage of removal of the metals. Maximum removal of both the metals was observed at 5 g/100 ml of the adsorbent. Conclusion: Copper and cadmium recovery is parallel at all time. The percentage of removal of copper increased with increase in the pH from 3 to 5. In the case of cadmium containing wastewater, the maximum removal of metal occurred at pH 5. The uptake amount of Cu2+ ions on chitosan increased rapidly with increasing contact time from 0 to 360 min and then reaches equilibrium after 360 min; the equilibrium constant for copper and cadmium ions is more or less the same for the adsorption reaction. © 2012 Springer-Verlag.


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.


Satheesh K.P.,Veltech Drrr And Drsr Technical University | Ravichandran S.,Veltech Drrr And Drsr Technical University | Suryanarayana Rao V.,Sri Krishnadevaraya University | Devanna N.,Jawaharlal Nehru Technological University Anantapur | Chandrasekhar K.B.,Jawaharlal Nehru Technological University Anantapur
International Journal of ChemTech Research | Year: 2011

The reagent 4-hydroxybenzaldehyde thiosemicarbazone (4-HBTS) has been used for the determination of Mo(VI) by spectrophotometric method. The reagent 4-HBTS gives green colour with Mo(VI)solution of weak acidic medium and the maximum absorbance was observed at 365nm, in acidic buffer p H 6.0. The molar absorptivity and Sandell's sensitivity of Mo(VI)- 4-HBTS complex are 1.25 x 10 4 L mol -1 cm -1 and 0.00109 μg/cm 2 respectively. The stability constant of 1:1 Mo(VI)-4-HBTS complex is 2.76x10 5. The effect of various diverse ions is also studied. The method was successfully applied for the determination of molybdenum in alloys containing molybdenum. The influence of interferences on the proposed method was studied and presented. The method was successfully applied for the determination of molybdenum in different alloy samples. A detailed report on comparison of spectrophotometric methods for the determination of Mo (VI) using various organic reagents also summarized.


Dhal P.K.,Veltech Drrr And Drsr Technical University | Rajan C.C.A.,Pondicherry Engineering College
Applied Mechanics and Materials | Year: 2014

This paper presents total harmonics elimination in H-bridge Multi-Level Inverter. The basic concept of this reduction is to eliminate harmonics in different level with an appropriate choice of switching angles. This paper employs Homotopy algorithm to solve the transcendental equations for finding the switching angles. This method solves the nonlinear transcendental equations. It is much simpler formulation without complex analytical calculations for any number of voltage levels. In this technique, it is not required transformer allows the use of a single dc power source (e.g., a battery or a fuel cell stack) with the remaining n - 1 dc sources being capacitors, which is referred to as hybrid cascaded H-bridge multilevel inverter (HCMLI). It has several informat ive Mat lab simulation results verify the validity and effectiveness of the proposed algorithm. © (2014) Trans Tech Publications, Switzerland.

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