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Sivakasi, India

Devi Arockia Vanitha C.,SFR College for women | Devaraj D.,Tamil University | Venkatesulu M.,Kalasalingam University
Procedia Computer Science | Year: 2014

DNA microarray technology can monitor the expression levels of thousands of genes simultaneously during important biological processes and across collections of related samples. Knowledge gained through microarray data analysis is increasingly important as they are useful for phenotype classification of diseases. This paper presents an effective method for gene classification using Support Vector Machine (SVM). SVM is a supervised learning algorithm capable of solving complex classification problems. Mutual information (MI) between the genes and the class label is used for identifying the informative genes. The selected genes are utilized for training the SVM classifier and the testing ability is evaluated using Leave-one-Out Cross Validation (LOOCV) method. The performance of the proposed approach is evaluated using two cancer microarray datasets. From the simulation study it is observed that the proposed approach reduces the dimension of the input features by identifying the most informative gene subset and improve classification accuracy when compared to other approaches. © 2015 The Authors. Published by Elsevier B.V.

Ramasubbu R.,Gandhigram Rural Institute | Chandra Prabha A.,SFR College for women
Plant Cell Biotechnology and Molecular Biology | Year: 2012

Saraca asoca (Roxb.) de Wilde (Ceasalpiniaceae) is a vulnerable medicinal as well as ornamental potential tree, distributed in the different parts of Western Ghats. Bark of S. asoca is extremely useful in uterine affections especially menorrhagia due to uterine fibroids and other causes. It is useful in many gynecological problems such as uterine bleeding associated with fibroids and the treatment of leucorrhoea. S. asoca is used in the treatment of dyspepsia, indigestion, blood disorders, tumors etc. Seeds have been recommended in the treatment of bone fractures, strangury and vesical calculi. The dried flowers are used in diabetes, haemorrhagic and dysentery. Increase in the number of people with poor health has made the alternative medical practitioners and pharmaceutical companies to exploit many important medicinal plants. Among these, S. asoca is also under severe threat due to unscientific management practices, ever increasing demand for its phytochemicals, poor seed viability and over exploitation of the plant parts like bark, flowers, seeds etc., has resulted in the dwindling of population in the wild. By considering the promising horticultural as well as medicinal important and its limited distribution, an efficient and reproducible method of in vitro clonal propagation through shoot tip, nodal and inter nodal explants of S. asoca was carried out. This direct method would be highly useful for the conservation of this vulnerable tree species. The synergetic effect of BAP (0.5 mg/L) induced a mean of 11.71±0.53 adventitious shoots from the nodal explants. The frequency of shoot organogenesis was highest (82%) in nodal explants treated with 0.5 mg/L of BAP and callus were formed more on 2,4-D. The micro shoots rooted well on MS medium supplemented with 4.0 mg/L of IB A. 40% of the hardened regenerants were acclimatized to the soil. © 2012 Society for Biology and Biotechnology.

Vijaya N.,SFR College for women | Selvasekarapandian S.,Kalasalingam University | Hirankumar G.,Kalasalingam University | Karthikeyan S.,Kalasalingam University | And 3 more authors.
Ionics | Year: 2012

The proton-conducting polymer electrolytes based on poly (N-vinylpyrrolidone) (PVP), doped with ammonium chloride (NH 4Cl) in different molar ratios, have been prepared by solution-casting technique using distilled water as solvent. The increase in amorphous nature of the polymer electrolytes has been confirmed by XRD analysis. The FTIR analysis confirms the complex formation of the polymer with the salt. A shift in glass transition temperature (T g) of the PVP/NH 4Cl electrolytes has been observed from the DSC thermograms which indicates the interaction between the polymer and the salt. From the AC impedance spectroscopic analysis, the ionic conductivity of 15 mol% NH 4Cl-doped PVP polymer complex has been found to be maximum of the order of 2. 51 × 10 -5 Scm -1 at room temperature. The dependence of T g and conductivity upon salt concentration has been discussed. The linear variation of the proton conductivity of the polymer electrolytes with increasing temperature suggests the Arrhenius type thermally activated process. The activation energy calculated from the Arrhenius plot for all compositions of PVP doped with NH 4Cl has been found to vary from 0. 49 to 0. 92 eV. The dielectric loss curves for the sample 85 mol% PVP:15 mol% NH 4Cl reveal the low-frequency β relaxation peak pronounced at high temperature, and it may be caused by side group dipoles. The relaxation parameters of the electrolytes have been obtained by the study of Tanδ as a function of frequency. © 2011 Springer-Verlag.

Kathirvalavakumar T.,VHNSN College | Ponmalar E.,SFR College for women
International Journal of Machine Learning and Cybernetics | Year: 2013

The proposed work is hybridizing self organizing map (SOM) and wavelet transform for performing image compression. The novelty in this work is applying discrete wavelet transform (DWT) on the code vector obtained from SOM after vector quantization and storing only the approximation coefficients along with the index values of the SOM. The experimental results of the proposed method show better compression and better peak signal to noise ratio (PSNR) value of the decompressed image. © 2012 Springer-Verlag.

Anbarasan R.,National Taiwan University | Kanchana S.,SFR College for women | Gayathri S.,SFR College for women | Jayalakshmi T.,SFR College for women | Dhanalakshmi V.,KCET
Journal of Applied Polymer Science | Year: 2010

Linear low-density polyethylene (LLDPE) was functionalized with succinimide under different experimental conditions like change in time, temperature, and (% weight of succinimide). The FTIR Spectrum inferred that melt grafting of succinimide onto LLDPE followed the 0.50 order of reaction with respect to (% weight of succinimide). DSC was used to analyze the (melting temperature) T m and (crystallization temperature) Tc values of functionalized LLDPE. Free radical mechanism explained the formation of nitroxide radical during the melt functionalization of N-hydroxy succinimide (NHS) with LLDPE in the presence of dicumyl peroxide. © 2009 Wiley Periodicals, Inc.

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