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Padmanabha B.,Maharanis Science College for Women
Research Journal of Chemistry and Environment | Year: 2015

The major ion concentration data has been processed using the HYCH-basic Computer programme. In this computer programme, the estimation of Sodium Adsorption Ratio (SAR), Residual Sodium Carbonate (RSC), Corrosivity Ratio (CR), USSL classification of water for salinity and sodium hazards and Permeability Index (PI) are employed. This study suggests that Sodium Percentage, Residual Sodium Carbonate (RSC) recorded higher in the Kamana lake than in the Dalvoi lake. Sodium Adsorption Ratio and Corrosivity ratio documented higher in Dalvoi lake than Kamana lake. The water of Kamana lake is noncorrosive and in Dalvoi lake it is corrosive. According to USSL classification, the water of these two lakes indicated low salinity with high or very high sodium hazard. Permeability index recorded higher in the Kamana than in the Dalvoi lake. Permeability index documented highest during winter season followed by monsoon and lowest in the summer season. Influx of large quantity of domestic sewage decreased water level and increased dissolved solids might have decreased the permeability index in the summer season. Source

Chethana B.K.,Indian Institute of Science | Reddy C.N.,Maharanis Science College for Women | Rao K.J.,Indian Institute of Science
Materials Research Bulletin | Year: 2012

This paper reports investigation of Na 2O and ZnO modified borovanadate glasses in the highly modified regime of compositions. These glasses have been prepared by microwave route. Ultraviolet (UV) and visible, infrared (IR), Magic Angle Spinning Nuclear Magnetic Resonance (MAS NMR) and Electron Paramagnetic Resonance (EPR) spectroscopies have been used to characterize the speciation in the glasses. Together with the variation of properties such as molar volume and glass transition temperatures, spectroscopic data indicate that at high levels of modification, ZnO tends to behave like network former. It is proposed that the observed variation of all the properties can be reasonably well understood with a structural model. The model considers that the modification and speciation in glasses are strongly determined by the hierarchy of group electronegativities. Further, it is proposed that the width of the transitions of glasses obtained under same condition reflects the fragility of the glasses. An empirical expression has been suggested to quantify fragility on the basis of width of the transition regions. © 2012 Elsevier Ltd. All rights reserved. Source

Prasad A.G.D.,University of Mysore | Shyma T.B.,University of Mysore | Raghavendra M.P.,Maharanis Science College for Women
Journal of Applied Pharmaceutical Science | Year: 2013

The tribes of Wayanad depend basically on different plants for their treatment. The field work documented about thirty two plant species used against digestive disorders. The plants used for the treatment with their botanical names, local name, mode of administration, status of plants and the tribes associated are listed in the form of table. Five different tribes, the kurichia, kuruma, kattunaika, paniya and adiya of Wayand district of Kerala state, India were interviewed. The interviewed tribal groups use plant parts either single or in combined form to treat digestive disorders like piles, ulcers, abdominal pain, diarrhea, dysentery, pinworm, vomiting, acidity, chest burning, jaundice and stomach pain. The tribal groups do not want to share their ancient traditional knowledge with other people. Moreover, the existing knowledge on traditional uses of medicinal plants are declining fast because of the lack of interest of young people to learn the traditional knowledge from the old tribal medical practitioner. So the documentation and conservation of the knowledge is essential. Source

Vanishree R.K.,Maharanis Science College for Women
Journal of Applied Fluid Mechanics | Year: 2014

A linear stability analysis is performed to study the effects of through-flow and internal heat generation on the preferred mode of stationary thermal convection in a variable viscosity liquid saturating an anisotropic porous medium. The Rayleigh-Ritz technique is used to obtain the eigenvalue of the problem. The influence of porous parameter, mechanical anisotropy parameter, Peclet number, thermal anisotropy parameter, Brinkman number and variable viscosity parameter on the stability of the system is analyzed. The problem suggests another method of controlling convection by externally controlling porous media damping and shear. This is in addition to the through-flow mechanism of regulating convection. Source

Basha P.M.,Bangalore University | Rai P.,Bangalore University | Begum S.,Maharanis Science College for Women
Biological Trace Element Research | Year: 2011

Multigenerational evaluation was made in rats on exposure to high fluoride (100 and 200 ppm) to assess neurotoxic potential of fluoride in discrete areas of the brain in terms of lipid peroxidation and the activity of antioxidant enzyme system. The rats were given fluoride through drinking water (100 and 200 ppm) and maintained subsequently for three generations. Fluoride treatment significantly increased the lipid peroxidation and decreased the activity of antioxidant enzymes viz, catalase, superoxide dismutase, glutathione peroxidase, glutathione S-transferase, and glutathione level in first-generation rats and these alterations were more pronounced in the subsequent second and thirdgeneration rats in both the doses tested. Decreased feed and water consumption, litter size and organ (brain) somatic index, marginal drop in body growth rate and mortality were observed in all three generations. Decreased antioxidant enzyme activity and increased malondialdehyde levels found in the present study might be related to oxidative damage that occurs variably in discrete regions of the brain. Results of this study can be taken as an index of neurotoxicity in rats exposed to water fluoridation over several generations. © Springer Science+Business Media, LLC 2010. Source

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