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Dhamodharavadhani S.,Mahendra Arts and Science College
Proceedings of the IEEE International Conference on Soft-Computing and Network Security, ICSNS 2015 | Year: 2015

In current trends without preexisting infrastructures, Mobile ad-hoc networks (MANETs) are a specific kind of wireless sensor networks which are quickly adopted. Collaborative, medical, military or embedded applications are some of the different types used here. Large number of nodes is used at the large scale of network when MANETs provides new challenges where many clustering algorithms are mitigated. Clusters are the group of entities which allow the clustering algorithm for structuring of network creates a hierarchical structure. Identity, mobility, degree, density, weight, etc., are some of the specific or combination of metrics where each cluster contains a particular node called cluster head. The characteristics of the transmission medium are sharing, low bandwidth, and the routing protocols (information diffusion, path finding, etc.) are the two drawbacks for MANETs. Resource management and net-work performance (routing delay, bandwidth consumption and throughput) are improved to play a vital role for clustering in mobile ad hoc networks. Identifier Neighbor based clustering, Energy based clustering, Mobility based clustering, Topology based clustering, and Weight based clustering are studied and analyzed for existing clustering approaches of MANETs in this article. Then the advantages and disadvantages of these techniques include clustering definition with the clustering approach based on the observation. © 2015 IEEE.


Govarthanan M.,Chonbuk National University | Govarthanan M.,Mahendra arts and science college | Selvankumar T.,Mahendra arts and science college | Manoharan K.,Raja Duraisingam government arts college | And 6 more authors.
International Journal of Nanomedicine | Year: 2014

Synthesis of silver nanoparticles (AgNPs) with biological properties is of vast signifcance in the development of scientifically valuable products. In the present study, we describe simple, unprecedented, nontoxic, eco-friendly, green synthesis of AgNPs using an Indian traditional farming formulating agent, panchakavya. Silver nitrate (1 mM) solution was mixed with panchakavya filtrate for the synthesis of AgNPs. The nanometallic dispersion was characterized by surface plasmon absorbance measuring 430 nm. Transmission electron microscopy showed the morphology and size of the AgNPs. Scanning electron microscopy- energy-dispersive spectroscopy and X-ray diffraction analysis confrmed the presence of AgNPs. Fourier transform infrared spectroscopy analysis revealed that proteins in the panchakavya were involved in the reduction and capping of AgNPs. In addition, we studied the antibacterial activity of synthesized AgNPs. The synthesized AgNPs (1-4 mM) extensively reduced the growth rate of antibiotic resistant bacteria such as Aeromonas sp., Acinetobacter sp., and Citrobacter sp., according to the increasing concentration of AgNPs. © 2014 Govarthanan et al.


Selvam K.,Center for Biotechnology | Govarthanan M.,Mahendra Arts and Science College | Govarthanan M.,Chonbuk National University | Kamala-Kannan S.,Chonbuk National University | And 5 more authors.
RSC Advances | Year: 2014

The aim of this study was to assess the mixed combination of coffee pulp waste (CPW) and pineapple waste (PW) residues for cellulase production using newly isolated Acinetobacter sp. TSK-MASC in solid state fermentation. Response surface methodology based Box-Behnken design (BBD) was employed to optimize variables such as pH, incubation time, concentrations of CPW and PW. The BBD design investigation showed a sound adjustment of the quadratic model with the experimental statistics. Statistics based 3-D plots were generated to evaluate the changes in the response surface and to understand the relationship between the enzyme yield and culture parameters. The higher production (888 U mL -1) was achieved after 60 h of incubation with 3.0 g L-1 of CPW and PW at pH 7.0. This journal is © the Partner Organisations 2014.


Govarthanan M.,Mahendra Arts and Science College | Govarthanan M.,Chonbuk National University | Selvankumar T.,Mahendra Arts and Science College | Selvam K.,Center for Biotechnology | And 3 more authors.
Journal of Industrial and Engineering Chemistry | Year: 2015

A native feather-degrading keratinolytic bacterium, Bacillus sp. MG-MASC-BT was isolated from feather dumping soil in Mallasamudram, Tamil Nadu, India and screened for keratinase production using alkali treated horn waste (HW) and feather waste (FW). The study factors influencing keratinase production was optimized by Box-Behnken design (BBD). The maximum enzyme production (1075. U/ml) was observed at pH 7.0, temperature 55. °C and growth period of 60. h. The media supplemented with 6% of HW and FW enhanced keratinase production. Statistics based contour plots were generated to evaluate the changes in the response surface and to understand the relationship between the enzyme yield and the culture conditions. © 2014 The Korean Society of Industrial and Engineering Chemistry.


Banupriya K.,Mahendra Arts and Science College | Andrews S.,Mahendra Arts and Science College
Proceedings of International Conference on Circuits, Communication, Control and Computing, I4C 2014 | Year: 2014

Every smart phone has internal storage for the users to store their important data in it. If any unknown person gets the device they can miss use the data stored inside the mobile since there is no protection for the stored data. It is the major problem for smart phone users because of the limited security of the mobile. To address this problem, it introduced a new technique which is functional on Android platform. This paper propose an application named Private Data Mode (PDM) to illustrate the technique of securing the user data by using cloud services. Through the PDM application the user can store the data directly to the cloud and not necessary to store inside mobile storage. The application utilizes a multiple level security techniques to protect the data which starts with image pattern matching as first level authentication for cloud entry. The next level of security aspect is cloud authentication which decides the type of data to be secured. The user can manually create or select the storage data by this application and they can instantly store into the cloud. The PDM performs both upload and download operations using the same authentication. The proposed technique provides more protection for the data by removing them from mobile storage and securing them in cloud. There are no limitations on the type of data and all users can access the PDM application which is portable to versatile mobile devices. © 2014 IEEE.


Kamaraj M.,Karpagam University | Sivaraj R.,Karpagam University | Govarthanan M.,Mahendra Arts and Science College
International Journal of Pharma and Bio Sciences | Year: 2012

Aspergillus oryzae is one of the common plant pathogens in wheat, sorghum and other crops. Its toxic activity has been proved. Hence, a sensitive, rapid, and inexpensive screening test to detect Aspergillus in agricultural commodities is necessary to protect human health. Aspergillus oryzae proteins were prepared, characterized, and used as an antigen. 6-month-old white albino rat were immunized by the antigen in combination with Freund's adjuvant. The antiserum of immunized rat was collected after 35 days. Proteins present in antiserum were precipitated by ammonium sulphate precipitation and purified by dialysis, ion exchange chromatography and SDS PAGE. Immuno blotting analysis was performed to determine antibody specificity towards the antigen. The optimum dilution of prepared IgG was 1:32. Dot strip ELISA test confirmed the presence of specific Antigen-Antibody interaction.


Hariharan V.,Mahendra Arts and Science College | Aroulmoji V.,Mahendra Educational Institutions | Prabakaran K.,Mahendra Arts and Science College | Gnanavel B.,CN College | And 3 more authors.
Journal of Alloys and Compounds | Year: 2016

Nanocrystalline WO3·H2O nanopowders, doped with cobalt (2 and 5 wt%) have been synthesized using CoCl2·6H2O and Na2WO4·2H2O in a facile microwave irradiation process, followed by the annealing process. The samples were characterized with powder X-ray diffraction, field emission scanning electron microscopy, UV-VIS diffusion reflectance spectroscopy, photoluminescence spectroscopy and cyclic voltammetry (CV). X-ray diffraction patterns showed both undoped and Co doped WO3·H2O crystallized with orthorhombic phase. Annealing h-WO3at 600 °C 6 h in air resulted in the different products, W17O47(monoclinic) for undoped, WO3orthorhombic for 2 wt% Co doped and WO3(monoclinic) for 5 wt% Co doped. FE-SEM micrographs suggested that the dopants are able to influence the growth rate and morphology of the prepared nanopowders. UV-VIS-DRS spectra revealed that the dopant (Co ion) is incorporated in the intermediate energy level. Blue emissions (450–550 nm) were verified using PL at room temperature for the annealed samples (W17O47and WO3) with excitation wavelength 390 nm. The difference in peak intensity observed through PL spectra attributed to the possible distortions in WO4 2−tetrahedron group during microwave irradiation process. Electrochemical studies showed the possible enhanced catalytic behaviour of cobalt doped (5 wt%) as prepared samples than that of others. The temperature dependent magnetic susceptibility (300 K–2 K) and isothermal magnetization measurements showed the enhancement in magnetic behaviour of the samples for diamagnetic to antiferromagnetic nature which is clearly shows the incorporation of Cobalt ion at tungsten lattice site and in determining the resultant magnetic behaviour of the samples. © 2016


Govarthanan M.,Mahendra Arts and Science College | Selvankumar T.,Mahendra Arts and Science College | Selvankumar T.,Bharathidhasan University | Arunprakash S.,Mahendra Arts and Science College
International Journal of Pharma and Bio Sciences | Year: 2011

A novel feather-degrading Bacillus Sp. was isolated from chick manure. The bacterium produces keratinolytic enzyme using chicken feather as a sole of carbon and nitrogen source. The effect of temperature, pH on keratinase production of this keratinolytic strain was studied. Maximum enzyme activities were obtained within 48 hrs (780U/ml) of cultivation. The optimal conditions for the keratinolytic activity were determined to be pH 9.0 and temperature 60°C; however the enzyme showed a broad range of pH between 5-10 and temperature 20°C - 100°C. In addition, the Bacillus sp was able to completely degrade within a period of 48 hrs.


PubMed | Center for Biotechnology, Mahendra Arts and Science College, Chonbuk National University and Korea Research Institute of Bioscience and Biotechnology
Type: | Journal: International journal of nanomedicine | Year: 2015

A rapid, green phytosynthesis of silver nanoparticles (AgNPs) using the aqueous extract of Helianthus tuberosus (sunroot tuber) was reported in this study. The morphology of the AgNPs was determined by transmission electron microscopy (TEM). Scanning electron microscopy-energy-dispersive spectroscopy (SEM-EDS) and X-ray powder diffraction (XRD) analysis confirmed the presence of AgNPs. Fourier transform infrared spectroscopy (FTIR) analysis revealed that biomolecules in the tuber extract were involved in the reduction and capping of AgNPs. The energy-dispersive spectroscopy (EDS) analysis of the AgNPs, using an energy range of 2-4 keV, confirmed the presence of elemental silver without any contamination. Further, the synthesized AgNPs were evaluated against phytopathogens such as Ralstonia solanacearum and Xanthomonas axonopodis. The AgNPs (1-4 mM) extensively reduced the growth rate of the phytopathogens. In addition, the cytotoxic effect of the synthesized AgNPs was analyzed using rat splenocytes. The cell viability was decreased according to the increasing concentration of AgNPs and 67% of cell death was observed at 100 g/mL.


PubMed | South Korean National Institute of Crop Science, Mahendra Arts and Science College, Chonbuk National University and Raja Duraisingam Government Arts College
Type: Journal Article | Journal: Artificial cells, nanomedicine, and biotechnology | Year: 2016

The study reports a simple, inexpensive, and eco-friendly synthesis of copper oxide nanoparticles (CuONPs) using Piper betle leaf extract. Formation of CuONPs was confirmed by UV-visible spectroscopy at 280 nm. Transmission electron microscopy (TEM) images showed that the CuONPs were spherical, with an average size of 50-100 nm. The scanning electron microscopy (SEM)-energy dispersive spectroscopy (EDS) peak was observed approximately at 1 and 8 keV. The X-ray diffraction (XRD) studies indicated that the particles were crystalline in nature. CuONPs effectively inhibited the growth of phytopathogens Ralstonia solanacearum and Xanthomonas axonopodis. The cytotoxic effect of the synthesized CuONPs was analyzed using rat splenocytes. The cell viability was decreased to 94% at 300 g/mL.

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