Government Arts College for Men
Government Arts College for Men
Bomila R.,Presidency College at Chennai |
Srinivasan S.,Presidency College at Chennai |
Venkatesan A.,Panimalar Engineering College |
Bharath B.,Government Arts College for Men |
Perinbam K.,Government Arts College for Men
Materials Research Innovations | Year: 2017
In this paper, pure and rare earth (Cerium) doped ZnO nanoparticles were synthesized via simple wet-chemical technique at low temperature. The structural analyses were carried out by Powder X-ray diffraction (PXRD) and it is reveal that the synthesized nanoparticles were well-crystalline and possessing hexagonal wurtzite structure. HR-SEM images depicted the homogenous spherical shaped ZnO nanoparticles. EDX analysis confirmed the presence of Ce ions into ZnO lattice. UV–Visible absorption spectra showed that the optical band gap value of pure ZnO decreased by Ce doping. PL spectra confirmed that the effective Ce doping enhances the visible emission and suppresses the near band gap emission. The presence of functional groups was confirmed by employing FT-IR and Raman spectroscopy studies. The bactericidal efficiency of Ce doped ZnO nanoparticles were investigated against a Gram positive (Bacillus subtilis, Staphylococcus aureus) and Gram negative bacteria (Proteus mirabilis, Salmonella typhi). © 2017 Informa UK Limited, trading as Taylor & Francis Group
Chinnasamy E.,Government Arts College for Men |
Senthil S.,Government Arts College for Men
AIP Conference Proceedings | Year: 2017
Single crystal of Urea Sulphamic acid (USA) single crystals were grown and harvested successfully at room temperature by slow solvent evaporation method. The cell parameters of the grown crystal were determined by single crystal X-ray diffraction analysis. The presence of various functional groups in the crystal is confirmed by FT-IR analysis. The optical transmission study reveals the transparency of the crystal and its optical band gap is found to be 4.74 eV. The crystal quality can be further examined by the time resolved Photoluminescence Spectroscopy. Laser damage threshold study was also carried for the grown crystal. © 2017 Author(s).
Deepa K.,Loyola College |
Senthil S.,Government Arts College for Men |
Shriprasad S.,Loyola College |
Madhavan J.,Loyola College
International Journal of ChemTech Research | Year: 2014
In this work we report CdS quantum dot sensitized solar cells which were assembled and tested under standard illumination condition. TiO2 nanoparticles of size 25 nm along with 4% of CdS QDs were taken for the preparation of CdS sensitized photo anode. The relatively high cost of solar technology has been a major impediment and production still exceeds the costs of generation by a significant margin. Hence attempts were made to replace Pt coated FTO counter electrode by alumina. We have also replaced the conventional hot-melt gasket by a glass adhesive. The characteristic current density Vs potential difference for CdS QDs sensitized solar cells was studied.
Ravichandran C.,Al Musanna College of Technology |
Kumar J.,Anna University |
Srinivasan G.,Government Arts College for Men |
Lennon C.,University of Illinois at Chicago |
Sivananthan S.,University of Illinois at Chicago
Journal of Materials Science: Materials in Electronics | Year: 2015
Cadmium and magnesium co-doped zinc oxide (ZnO) thin films have been deposited on sapphire substrates using the sol–gel method and the spin coating technique. X-ray diffraction studies confirmed that the deposited films exhibit a hexagonal wurtzite ZnO structure. A strong ultraviolet near-band-edge emission and a deep level emission were observed in the room temperature photoluminescence (PL) spectra of all the films. The PL spectra were also investigated as a function of temperature to examine the emission mechanism of the deposited films. The ability to vary the band gap energy from 3.1 to 3.6 eV was realised by adjusting the cadmium and magnesium concentration in the co-doped ZnO films. X-ray photoelectron spectroscopy studies revealed the successful incorporation of cadmium and magnesium in the ZnO films. © 2015, Springer Science+Business Media New York.
Manoharan,M S University |
R Subistalin M.,Tamil University |
Kalaimagal R.,Government Arts College for Men
International Journal of Applied Engineering Research | Year: 2015
This paper presents a methodology for the detection of breast masses in mammogram images through shearlet transform and support vector machine (SVM). The proposed system focuses on two methods of how to segment the underlying masses in the noisy mammograms using shearlet transformation function and another is to classify the features that depict the masses in breast mammogram using SVM. The automatic mass detection includesthree stages (1) Image enhancement and contrast adjustment, (2) Segmentation (ROI) and (3) Classification (SVM classifier). The proposed approach is applied to MIAS mini image dataset and their findings depict the normal and severity of abnormal based on benign and malignant. The initial preprocessing stage includes the image enhancement using shearlet transform for de-noisingthroughshearlet filters to remove the white noise and contrast adjustment. These regions have their shapes analyzed through the shape descriptors. Support vector machines were used to classify the candidate regions as masses or non-masses. © Research India Publications.
Devanesan S.,King Saud University |
Devanesan S.,Bharathiar University |
Mohamad Saleh A.,King Saud University |
Ravikumar M.,Government Arts College for Men |
And 6 more authors.
Journal of Biomedical Optics | Year: 2014
Thalassemia (Thal), sickle cell anemia, and iron deficiency anemia (IDA) are the most common blood disorders in many parts of the world, particularly in developing countries like India and Bangladesh. The wellestablished diagnostic procedure for them is the complete blood count (CBC); however, there is substantial confusion in discrimination between Thal and IDA blood samples based on such CBC. We propose a new spectral technique for reliable classification between the above two anemias. This is based on the identification and quantification of a certain set of fluorescent metabolites found in the blood samples of patients of Thal and IDA. © The Authors.
Mullainathan S.,Government Arts College for Men |
Nithiyanantham S.,SRM University |
Nithiyanantham S.,Thiruvalluvar University
Environmental Earth Sciences | Year: 2016
Minerals of 15 rock sediments of Kollimalai Hills, Namakkal district, Tamil Nadu, South India, were determined using FTIR spectroscopy Crystallinity, extinction coefficient and relative distribution for different types of vegetation were analyzed owing to its importance and the suitability and those parameters were compared with those of many reported relevant data. The possible vegetation of each city is interpreted in light of qualitatively and quantitatively observed measurements of relevant parameters such as crystallinity index, relative distribution and extinction coefficients. © 2016, Springer-Verlag Berlin Heidelberg.
PubMed | Government Arts College for Men, Rajah Serfoji Government College, King Saud University and Kidwai Memorial Institute of Oncology
Type: Journal Article | Journal: Journal of biomedical optics | Year: 2014
Thalassemia (Thal), sickle cell anemia, and iron deficiency anemia (IDA) are the most common blood disorders in many parts of the world, particularly in developing countries like India and Bangladesh. The well-established diagnostic procedure for them is the complete blood count (CBC); however, there is substantial confusion in discrimination between Thal and IDA blood samples based on such CBC. We propose a new spectral technique for reliable classification between the above two anemias. This is based on the identification and quantification of a certain set of fluorescent metabolites found in the blood samples of patients of Thal and IDA.
Murthy S.,Government Arts College for Men |
Ganapathy G.,Rmd Engineering College
Communications in Computer and Information Science | Year: 2012
In this paper, we investigate the general solution and generalized Ulam-Hyers stability of a n-dimensional quadratic functional equation (Equation Presented) with n ≥ 2. Counterexamples for non-stability cases are also studied through out this paper. © 2012 Springer-Verlag.