Entity

Time filter

Source Type


Muthulakshmi L.,Kalasalingam University | Ramu A.,Madurai Kamaraj University | kannan N.,Ayya Nadar Janaki Ammal College
Electronic Journal of Environmental, Agricultural and Food Chemistry | Year: 2012

Geochemical structure, Industrial wastes and agrochemicals create a potential source of heavy metal pollution in the aquatic environment. A comprehensive study has been carried out with respect to cadmium, chromium, lead, manganese, copper, and zinc and mercury contamination of ground water in Virudhunagar district of Tamil Nadu, South India. The ground water samples from 18 different locations from industrial as well as domestic areas were collected in winter, summer and rainy seasons. The metals were analyzed by using Atomic Absorption Spectroscopy, Perkin Elmer AA 200 model and the results were compared with the WHO and BIS standards for potable water. The toxicity of metal is dependent on their solubility and this in turn depends on pH and on the presence of different types of anions and cations. The levels of dissolved heavy metals Cd, Cr, Zn, Cu, and Hg were found to be below the maximum permissible limit prescribed by WHO and BIS standards for drinking water. The concentration of lead and manganese were found to be above the maximum permissible limit prescribed by WHO and BIS standards for drinking water in Sivakasi, Virudhunagar and Aruppukkottai study area. A slight increment in heavy metal concentration is produced in summer season than the winter season. The metal concentration of ground water in the district follows the trend Zn > Mn > Pb > Cu > Hg > Cr > Cd in winter, summer and rainy season. A measurements and results analysis shows that rocks weathering and anthropogenic inputs are found to be the main sources for heavy metals in ground water. Source


Uma Sangari N.,The Sfr College For Women | Velusamy P.,Ayya Nadar Janaki Ammal College
International Journal of ChemTech Research | Year: 2014

Enhancement of photodecoloration of Metanil yellow by ZnO in presence of Beta cyclodextrin (β-CD) was investigated under UV light. The factors influencing the photodecoloration of Metanil yellow such as the initial concentration of the dye, pH of dye solution, amount of catalyst and illumination time were studied. It was observed that the rate of photodecoloration of MY in aqueous solution was enhanced in presence of β-CD. The inclusion of MY in to hydrophobic cavity of β-CD was investigated through UV-Visible spectroscopy. The interaction of β-CD with the surface of ZnO was analyzed by XRD, UV-DRS, FT-IR and PL spectra. The kinetics of photodecoloration by ZnO and ZnO -β-CD was tested with Langmuir-Hinshelwood mechanism. © 2014, Sphinx Knowledge House. All rights Reserved. Source


Devamani R.H.P.,Vv Vanniaperumal College For Women | Alagar M.,Ayya Nadar Janaki Ammal College
Nano Biomedicine and Engineering | Year: 2013

Copper (II) Hydroxide nano particles were synthesized via chemical co-precipitation method from Copper Sulphate and Sodium Hydroxide. Structural and compositional properties were characterized by XRD, SEM, FTIR and UV spectroscopy. XRD confirmed the preferential growth of Copper (II) Hydroxide nano particles that width is 33.42nm. The SEM image shows the synthesized Copper (II) Hydroxide show well crystallized particles with plate-like morphology. The FTIR spectrum is used to study the stretching and bending frequencies of molecular functional groups in the sample. From UV spectrum, the band gap of Copper (II) hydroxide nano particles is found to be 4.5 eV. From AAS studies, it is found that the absorbance is directly proportional to the concentration. The linear fit indicates that Copper (II) Hydroxide nanoparticles have been distributed in proper proportion. Copyright:(c) 2013 R H. P. Devamani and M Alagar. Source


Krishnan S.M.,Ayya Nadar Janaki Ammal College | Sanjayan K.P.,Guru Nanak Institutions
World Applied Sciences Journal | Year: 2016

The Entomopathogenic micro-fungal species Metarhizium anisopliae was collected from the agricultural soils of Kanchipuram district of Tamil Nadu, India. Micro-fungal spores of Metarhizium anisopliae were tested for its effect on the feeding of Spodoptera litura at three different concentrations of 103, 105 and 107. The Higher concentration of spore significantly reduce the consumption of leaf. The exposure of fungal spore's concentration decrease the production efficiency. The microfungal infection reduction of Spodoptera litura gut enzymes such as amylase and trehalase and reduced weight gain of infected insects and 33.32% mortality recorded in microfungal infected S.litura. © IDOSI Publications, 2016. Source


Baca M.,Technical University of Kosice | Jendrol S.,University of P.J. Safarik | Kathiresan K.,Ayya Nadar Janaki Ammal College | Muthugurupackiam K.,Rajah Serfoji Government College
Applied Mathematics and Information Sciences | Year: 2015

A face irregular entire k-labeling j ϕ: V υE υF →{1,2,., k} of a 2-connected plane graph G = (V, E, F) is a labeling of vertices, edges and faces of G in such a way that for any two different faces f and g their weights wϕ (f) and wϕ (g) are distinct. The weight of a face f under a k-labeling ϕ is the sum of labels carried by that face and all the edges and vertices incident with the face. The minimum k for which a plane graph G has a face irregular entire k-labeling is called the entire face irregularity strength. We investigate a face irregular entire labeling as a modification of the well-known vertex irregular and edge irregular total labelings of graphs. We obtain some estimations on the entire face irregularity strength and determine the precise values for graphs from three families of plane graphs. © 2015 NSP. Source

Discover hidden collaborations