Chennai, India
Chennai, India

Sathyabama University is a private university at Chennai in Tamil Nadu, India, founded in 1988 as Sathyabama Engineering College by Jeppiaar Educational Trust and inaugurated by then Chief Minister of Tamil Nadu, Janaki Ramachandran. It was formerly known as Sathyabama Institute of Science and Technology . The university is headed by Jeppiaar, a former politician under the late M. G. Ramachandran. It is a Christian minority institution.The Ministry of Human Resources Development declared the college a 'Deemed University' on 16 July 2001 and as a 'University' on 13 September 2006, under section 3 of the UGC Act. According to the 2010 University Web Ranking website Sathyabama was ranked 5th among universities in Chennai. In a recent report by Outlook India, Sathyabama University has been ranked as the 86th best university in India.Nationally, the university has gained an unsavory reputation, along with other institutions established by Jeppiaar for repressing social interaction between students of different genders and for a series of draconian rules. Wikipedia.

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Anuradha Jabasingh S.,Sathyabama University
International Biodeterioration and Biodegradation | Year: 2011

The present study is aimed at simultaneous cellulase synthesis and coir pith degradation by Aspergillus nidulans using coir pith as chief substrate. The lignocellulosic biomass, coir pith is known to be an excellent carbon source for microbial cellulase production under solid state fermentation. The alkali pretreatment with sodium hydroxide was seen to enhance enzymatic hydrolysis. The effect of coir pith weight, moisture content, initial pH and growth temperature on cellulase activity and yield were investigated by response surface methodology (RSM) employing a four-factor-five-level central composite design (CCD). The results of Fourier transform infrared spectroscopy (FTIR), X-Ray diffraction (XRD) and Scanning electron microscopy (SEM) of coir pith showed structural changes through pretreatment, in favor of enzymatic hydrolysis. Maximum carboxy methyl cellulase activity (CMCase) of 28.64 U/g and cellulase yield of 66.32% were achieved with 8 g coir pith at 70% moisture content and 40 °C temperature with pH 5 as evident from run numbers 25 and 30. Filter paper (FPase) and cellobiase (CBase) activities of 10.23 U/g and 4.31 U/g respectively were observed on the 11th day after the inoculation. © 2011 Elsevier Ltd.

Jaynthy C.,Sathyabama University
Asian Journal of Pharmaceutical and Clinical Research | Year: 2014

With recent innovations in the field of nanosciences, research has shown tremendous advances in the arena of drug carriers. In this aspect, our work comes out with a novel dipeptide Boc-Val-Val-NHMe which has been synthesized, characterized and its aggregational behavior studied in non aqueous medium. The peptides forms inverted micelles at different temperatures ranging from 297 to 390 Kelvin. Inverted micelles are discrete particles with the hydrophilic ends clustered together leaving the hydrophobic moieties to interact with the solvent (hydrophobic) medium. These micelles find diverse applications.

Sowmya B.,Sathyabama University | Sheela Rani B.,Sathyabama University
Applied Soft Computing Journal | Year: 2011

This paper explains the task of segmenting any given colour image using fuzzy clustering algorithms and competitive neural network. The fuzzy clustering algorithms used are Fuzzy C means algorithm, Possibilistic Fuzzy C means. Image segmentation is the process of dividing the pixels into homogeneous classes or clusters so that items in the same class are as similar as possible and items in different classes are as dissimilar as possible. The most basic attribute for image segmentation is the luminance amplitude for a monochrome image and colour components for a colour image. Since there are more than 16 million colours available in any image and it is difficult to analyse the image on all of its colours, the likely colours are grouped together by means of image segmentation. For that purpose soft computing techniques namely Fuzzy C means algorithm (FCM), Possibilistic Fuzzy C means algorithm (PFCM) and competitive neural network (CNN) have been used. A self-estimation algorithm has been developed for determining the number of clusters. The images segmented by these three soft computing techniques are compared using image quality metrics: peak signal to noise ratio (PSNR) and compression ratio. The time taken for image segmentation is also used as a comparison parameter. The techniques have been tested with images of different size and resolution and the results obtained by CNN are proven to be better than the fuzzy clustering technique. © 2010 Elsevier B.V. All rights reserved.

Ravi T.,Sathyabama University
International Journal of Applied Engineering Research | Year: 2015

The electronic industries focus power is the major constrains for the development of electronic system. In recent VLSI design millions of components are integrated then the leakage power tends to play a major role in the total power consumption. The main objective of this paper is to overcome the drawbacks of Tri-model logic system and a proposed Hybrid drowsy logic is used to design the RISC processor architecture. The RISC architecture functional blocks are designed using hybrid drowsy logic, which works in sleep, drowsy and active, modes. The proposed architecture is designed and analysed in HSPICE environment using sub-nanometer CMOS technologies. The performances such as transient and power analysis in different CMOS technologies claim that the proposed RISC architecture design is more power efficient, which is suitable for low power applications. © Research India Publications.

Sivachidambaranathan V.,Sathyabama University
International Journal of Applied Engineering Research | Year: 2014

The use of soft-switching techniques, alleviates switching loss problems and allows a significant increase in the converter switching frequency. Under constant frequency, the filter designs are simplified and utilisation of magnetic components are improved. The LCC-Series Parallel Resonant Converter (SPRC) takes on the desirable characteristics of the pure series and the pure parallel converter, thus removing the main disadvantages. In the present work Bi-directional Series Parallel Resonant Converter are designed with improved power factor, and the simulation results are presented. © 2014, Research India Publications.

Saravanan M.,SRM University | Nanda A.,Sathyabama University
Colloids and Surfaces B: Biointerfaces | Year: 2010

New enzymatic approaches using bacteria and fungi for the synthesis of nanoparticles in both intra- and extracellular are playing an advanced key role in pharmacotherapeutics. In the present study we have reported on the use of fungus Aspergillus clavatus for the extracellular synthesis of bionanoparticles from silver nitrate (AgNO3) solution. The bionanoscale particles were characterized by UV-visible spectroscopy, thin layer chromatography, atomic force microscopy (AFM) and FTIR. The synthesized bionanoscale particle showed a maximum absorption in the visible region of 420nm. The AFM study of bionanoscale particle ranged in the size of 550-650nm. The analysis was carried out by TLC and FTIR to identify the biomolecules responsible for the bioreduction of silver ion and capping of the bioreduced silver nanoparticles. The present study analyzes the antimicrobial activity of the silver nanoparticles synthesized from A. clavatus against MRSA and MRSE, which showed the maximum activity against MRSA, followed by MRSE. © 2010 Elsevier B.V.

Mathan N.,Sathyabama University
Biosciences Biotechnology Research Asia | Year: 2014

CNTFET is a novel device that is projected to outperform scaled CMOS technologies.Multiplier is one of the very important hardware blocks such as FIR filters, digital signal processors etc.The performance speed of the multiplier often affects the overall speed performance in VLSI systems. On the whole, multiplication employs most of the execution time in many Digital signal processor (DSP) devices. So, high speed multiplier is greatly desired. In this paper, a high speed existing radix-4 multiplier based Shannon adder is analysed intensively. To achieve an efficient radix-4 multiplier, the proposed hybrid adder was implemented for further power reduction in high speed parallel radix-4 multiplier circuits. The proposed radix-4 multiplier is more desirable for obtaining the low power consumption, less propagation delay and efficient power delay product. Simulations are executed using Synopsys HSpice in 32nm CMOS and 32nm CNTFET Technologies. The simulation results exhibits the transcendences of the proposed structures in terms of Power consumption, propagation delay and Power delay product compared to the advanced technology of CMOS and CNTFET based designs.

Inbakandan D.,Sathyabama University
Biofouling | Year: 2010

Marine bacteria from the hull of a ship in the form of biofilms or microfouling were isolated, cultured, and identified by phylogenetic analysis using 16S rDNA sequences. With an average length of 946 bp, all the 16 sequences were classified using the Ribosomal database project (RDP) and were submitted to the National Center for Biotechnology Information. Phylogenetic analysis using 16S rDNA sequences indicated that the 16 strains belonged to the Firmicutes (IK-MB6 Exiguobacterium aurantiacum, IK-MB7 Exiguobacterium arabatum, IK-MB8 Exiguobacterium arabatum, IK-MB9 Jeotgalibacillus alimentarius, IK-MB10 Bacillus megaterium, IK-MB11 Bacillus pumilus, IK-MB12 Bacillus pumilus, IK-MB13 Bacillus pumilus, IK-MB14 Bacillus megaterium), High GC, Gram-positive bacteria (IK-MB2 Micrococcus luteus, IK-MB5 Micrococcus luteus, IK-MB16 Arthrobacter mysorens), G-Proteobacteria (IK-MB3 Halomonas aquamarina, IK-MB15 Halotalea alkalilenta), CFB group bacteria (IK-MB1 Myroides odoratimimus), and Enterobacteria (IK-MB4 Proteus mirabilis). Among the 16 strains, representatives of the Firmicutes were dominant (56.25%) compared to the high GC, Gram-positive bacteria (18.75%), G-Proteobacteria (12.5%), CFB group bacteria (6.25%), and Enterobacteria (6.25%). Analysis revealed that majority of marine species found in marine biofilm are of anthropogenic origin.

Jeevitha D.,Sathyabama University | Amarnath K.,Sathyabama University
Colloids and Surfaces B: Biointerfaces | Year: 2013

Designing novel materials for biomedical applications generally require the use of biodegradable materials. This study aims to engineer a biodegradable [chitosan (CS) and poly (lactic acid) (PLA)] as AQ carrier with nanometer dimensions and to evaluate the anticancer potency of the prepared CS/PLA-AQ NPs in human carcinoma (HepG2) cells. CS-PLA complex, which are well dispersed and stable in aqueous solution, was prepared by the precipitation of lactic acid in chitosan solution by dropping method and characterized by SEM, TEM, DLS and FTIR. The results thus displayed that the prepared nanoparticles carried a positive charge and showed the size in the range from 100 to 200. nm. The in vitro (AQ) release study showed that these nanoparticles provided a continuous release of the entrapped AQ for 10 days, and the release behavior was influenced by the pH value of the medium thereby making feasible to develop CS-PLA for enhanced and sustained release of AQ. MTT assay revealed higher cytotoxic efficacy of CS/PLA-AQ NPs than Free AQ in HepG2 cells. Further, the mitochondrial membrane damage indicated by loss of mitochondrial membrane potential and necrotic cell death could be attributed to the increased reactive oxygen species production. Our results also suggest that upon CS/PLA-AQ NPs exposure the cell viability decreased due to apoptosis, as demonstrated by the formation of apoptotic bodies, sub-G1 hypodiploid cells, and DNA fragmentation. Henceforth, CS/PLA-AQ NPs demonstrated a strong antitumor activity in vitro by reducing cell viability, inducing cell necrosis, decreasing the negative surface charge and mitochondrial membrane potential, and fragmenting DNA. © 2012 Elsevier B.V.

In current trends Carbon Nano Tube Field Effect Transistor is considered as promising successor of Metal Oxide Semiconductor Field Effect Transistor. MOSFET scaling has faced serious limitations related to fabrication technology and device performances as the critical dimension goes down to sub-22 nm range. The limitations are electron tunneling through the thin insulator films, more power dissipation and short channel effects and also variations in doping concentration. These limitations can be overcome to some extent by modifying the channel material in the MOSFET structure with a single carbon nanotube. The high electron and hole mobility of carbon nano tubes with high k gate dielectrics, enhanced high performance nanoscale transistors. Filter is one of the major building blocks in DSP. The polyphase filters are very important component in the design of various filter structures. To evaluate the performance of high celerity transposed polyphase decimation filter using 10 nanometre CNTFET technologies. The results are obtained by analyzing average power, delay, and energy consumption. The CNTFET technology based filter design is analyzed and compared with CMOS technology based design. © 2016 Elsevier Ltd.

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