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Babu E.,Madurai Kamaraj University | Muthu Mareeswaran P.,Madurai Kamaraj University | Muthu Mareeswaran P.,Korea Advanced Institute of Science and Technology | Singaravadivel S.,Madurai Kamaraj University | And 3 more authors.
Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy

A selective, label free luminescence sensor for bovine serum albumin (BSA) is investigated using ruthenium(II) complexes over the other proteins. Interaction between BSA and ruthenium(II) complexes has been studied using absorption, emission, excited state lifetime and circular dichroism (CD) spectral techniques. The luminescence intensity of ruthenium(II) complexes (I and II), has enhanced at 602 and 613 nm with a large hypsochromic shift of 18 and 5 nm respectively upon addition of BSA. The mode of binding of ruthenium(II) complexes with BSA has analyzed using computational docking studies. © 2014 Elsevier B.V. All rights reserved. Source

Arjunan N.K.,Periyar University | Kadarkarai M.,Bharathiar University | Kumar S.,Sri Gvg Visalakshi College For Women | Pari M.,Bharathiar University | And 3 more authors.
Acta Tropica

Malaria causes extensive morbidity and mortality in humans and results in significant economic losses in India. The distribution of immature malaria-transmitting Anopheles mosquitoes was studied in 17 villages in Coimbatore District as a prelude to the development and implementation of vector control strategies that are intended to reduce the risk of human exposure to potentially infectious mosquitoes. Eight Anopheles species were recorded. The most numerous species were Anopheles vagus, Anopheles subpictus, and Anopheles hyrcanus. The location of mosquito development sites and the density of larvae in each village was evaluated for correlation with selected demographic, biologic, and land use parameters using remote sensing and geographic information systems (GIS) technology. We found the number of mosquito development sites in a village and the density of larvae in such sites to be positively correlated with human population density but not the surface area (km2) of the village. The number of mosquito development sites and the density of larvae in each site were not correlated. Data from this study are being used to construct a GIS-based mapping system that will enable the location of aquatic habitats with Anopheles larvae in the Coimbatore District, Tamil Nadu, India as target sites for the application of vector control. © 2015 Elsevier B.V. Source

Renugadevi N.,Avinashilingam Deemed University for Woman | Umadevi S.,Sri Gvg Visalakshi College For Women
Indian Journal of Environmental Protection

In this study the efficiency of low cost eco-friendly carbon adsorbent prepared from Bauhenia racemosa seed (BRSC) was analysed for the removal of crystal violet (CV) dye from aqueous solution. Kinetics and thermodynamic parameters of the adsorption of crystal violet dye were evaluated. Adsorption kinetics is an important parameter as it provides significant details, such as reaction pathways and mechanism of the reactions. The adsorption kinetics of crystal violet dye onto Bauhenia racemosa seed followed Pseudo second order reaction model. The intraparticle diffusion study shows that the rate constant for intraparticle diffusion (Kp) increased with increase in initial concentration of crystal violet dye solution. The results of the thermodynamic studies revealed that the adsorption of crystal violet dye onto Bauhenia racemosa seed was spontaneous and endothermic in nature. The positive value of entropy change showed increased randomness during adsorption. ©2015 - Kalpana Corporation. Source

Manikandan R.,Periyar University | Kalaichelvi S.,Sri Gvg Visalakshi College For Women | Ezhili N.,PSGR Krishnammal College For Women
Journal of Materials and Environmental Science

Kuruchi Lake is an important freshwater body of Coimbatore City, Tamil Nadu, India. This lake receives municipal wastes and industrial effluents which contain heavy metals. Therefore, the present study was aimed to investigate the status of physicochemical properties and heavy metal levels in surface sediments of Kuruchi Lake. The result of physicochemical parameters such as pH, Electro Conductivity (EC), chloride, calcium, magnesium, phosphate, sulphate, sodium, potassium, total nitrogen, iron, total alkalinity and total organic carbon concentrations were found to be higher in sediment sample of station 4. The heavy metals concentration showed variations with Cd 4-14 mg/kg, Cr 2295-3198 mg/kg, Cu 872-1199 mg/kg, Ni 964-1520 mg/kg, Mn 4996-5820 mg/kg and Pb 999-1489 mg/kg, respectively. The highest concentrations of Cr, Pb, Ni and Cu were found to be higher in station 4, when compared to other study stations. Cd and Mn levels were found within the normal range. The cluster analysis was used for determining the similarity of heavy metals concentrations in different study stations. This study reveals that sediments of Kuruchi Lake were partially polluted with heavy metals. This study provides the baseline data for future sediment quality assessment of this lake and regular monitoring of sediment quality in this lake is highly recommended. Source

Aram S.,Sri Gvg Visalakshi College For Women | Karunakaran M.,Government Arts College | Vijayakumar C.T.,k-Technology
Asian Journal of Chemistry

Terpolymer resin was synthesized through the condensation of p-cresol, urea and formaldehyde in the mole ratio 1:1:2 in the presence of 2 M HCl as the catalyst. The weight average molecular weight of the synthesized terpolymer was found to be 8738 as determined by gel permeation chromatography. The structure of the terpolymer was investigated using fourier transform infrared spectrophotometer and proton nuclear magnetic resonance spectrometer ( 1H NMR). Thermogravimetric analysis was performed to establish its thermal stability. Doyle, Horowitz and Metzger, Murray and White, Broido and Dharwadkar and Kharkhanavala methods were used to calculate the thermodynamic parameters such as enthalpy of activation (H*), entropy of activation (S*), free energy of activation (G *) and pre-exponential factor (A) for the different thermal decomposition steps shown by the terpolymer. © Asian Journal of Chemistry 2013. Source

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