Prabakaran G.,Government of Tamilnadu |
Rajasekara Pandian M.,Arignar Anna Arts College
Pollution Research | Year: 2010
With continued economic growth population increase, urbanization and technical development more and more waste materials are discharged into water bodies. This results in the pollution of water and affects the aquatic ecosystems, moreover, each type of water pollution affects the biotic and abiotic factors of different aquatic systems to different degrees . In the present study, attempts were made to investigate the impact of pollution on the level of extractable proteins, carbohydrates and total lipids in gills, Liver and muscles of Cyprinus carpio.The quantitative and qualitative study of proteins revealed a significant decrease in the different organs of Cyprinus carpio; the significant decrease in proteins content is seen in dye factory effluent treatment. This decline has been due to the hydrolysis and oxidation of proteins. The decline in carbohydrate content in the different organs is due to the anaerobic breakdown of glucose available to the cells through enhanced glycogenolysis. The decreased lipid contents is due to the inhibition in the process of lipid biosynthesis or due to greater utilization of the stored lipids to meet the decreased demand for energy due to the stresses following diastic alterations in physio - chemical parameters of waters. The remarakable change has been noted in dye factory effluent followed by agricultural run off sewage and cauvery water. When sewage and cauvery water treatments were compared with agricultural run off the latter shows more effects in the protein, carbohydrate and lipid concentration. However the ground water shows less contamination when compared to all the other water treatments. Copyright © EM International.
Mumthas S.,Peet Memorial Training College |
Chidambaram A.A.,Annamalai University |
Sundaramoorthy P.,Annamalai University |
Ganesh S.K.,Arignar Anna Arts College
Emirates Journal of Food and Agriculture | Year: 2010
Heavy metals are the metals having a density at least five times more than that of water. They are normally regarded as ones having an atomic number of 22-92.The effects of different concentration (5, 10, 25, 50 and 100 mg/l) of arsenic and manganese on germination, root growth and cell division in root tips of green gram (Vigna radiata.L) were studied. The inhibition of germination and root growth was noticed at higher concentrations of Arsenic and manganese. Arsenic had more toxic effect than manganese on the root tip cells of greengram during mitosis. Chromosome stickness implied the high toxicity of arsenic and manganese. The results also indicated that the germination percentage and root length was gradually decreased with the increasing concentration of both heavy metals.
Priyadharsini P.,Pondicherry University |
Pradeep A.,Arignar Anna Arts College |
Sathyamoorthy B.,Pondicherry University |
Chandrasekaran G.,Pondicherry University
Journal of Physics and Chemistry of Solids | Year: 2014
Room temperature multiferroic properties of BiFeO3 (BFO), Bi0.9La0.1FeO3 ((La)BFO) and Bi 0.9La0.075Ce0.025FeO3 ((La,Ce)BFO) nanoparticles have been reported in this paper. XRD (X-ray diffraction) analyses of the nanoparticles show a decrease in the lattice constants and cell volume with the substitution of La and Ce. It is evident from the SEM (scanning electron microscope) micrographs that the (La,Ce) co-doped sample possesses dense microstructure made of smaller particles. Raman study accounts for the weakening of the strong hybridization between Bi-O by the substitution of La and Ce ions. This is also accompanied by an increase in the remanent magnetization, dielectric constant, and ferroelectric polarization. BFO nanoparticles show exchange bias effect under an applied magnetic field while the (La)BFO and (La,Ce)BFO samples show no trace of such effect. Ac-conductivity of (La,Ce) co-doped sample is observed to be several orders lesser in magnitude than bulk BFO ceramics. These results are interpreted by means of the subtle change in the structure, suppression of the spin cycloid and reduction of oxygen vacancies in the doped samples. © 2014 Elsevier Ltd.
Shibu A.,Mills College |
Sundara Pandian S.M.,Pondicherry University |
Dhanam S.,Arignar Anna Arts College
Biosciences Biotechnology Research Asia | Year: 2012
Plant are the basic source of knowledge of modern medicine. India is a varietal emporium of medicinal plants and is one of the richest countries in the world in regard to genetic resources of medicinal plants. The present study deals with the Antibacterial activity of Gmelina asiatica L. The stem, root, leaf are powdered and their extracts have been taken from Acetone, Benzene, Chloroform. It is found that the plant extracts have Antibacterial activity against the following nine microbes. Bacillus subtilis, Micrococcus luteus, Staphylococcus aureus, Streptococcus pneumoniae, Klebsiella pneumoniae, Pesudomonas aeruginosa, Proteus mirabilis, Escherichia coli.
Sivakumar V.,Sri Vasavi College |
Asaithambi M.,Erode Arts and Science College |
Goral N.,Erode Arts and Science College |
Sivakumar P.,Arignar Anna Arts College
Pollution Research | Year: 2014
A low cost adsorbent was synthesized from Martynia annua, L. using phosphoric acid as an activating agent and it was applied for the removal of Colocid Blue FF DC (CAB) dye from aqueous solutions. The BET surface area of the adsorbent was found to be 401.103m2/g. The adsorption capacity of the carbon was also investigated at different contact times, pH, temperature and initial dye concentrations. The dye removal increased at respective pHzpc density of the carbon. The equilibrium and kinetics of adsorption were investigated in a batch adsorption system. Equilibrium adsorption data were analysed using Langmuir, Freundlich, Temkin, Dubinin-Radushkevich (D-R), Halsey and Harkins-Jura isotherm models. Pseudo-first order, pseudo-second order, Elovich and intraparricle diffusion models were applied to test the kinetic data. The process of removal of CAB was better governed by pseudo-second order kinetics with a high correlation coefficient value (0.9921) for an initial concentration of 10mg/L. The value of thermodynamic parameters such as standard free energy change (ΔG°), standard enthalpy (ΔH°), and standard entropy (ΔS°) were evaluated and it indicates the feasibility and spontaneity of the adsorption process. Copyright © EM International.