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Chavan V.R.,Balwant College | Muley D.V.,Shivaji University
Advanced Science Letters | Year: 2015

Mercury (Hg) is highly toxic, nonessential, persistent, immutable and nonbiodegradable metal and is highly toxic to animals and cause death and sub lethal pathology of aquatic animals. The present study has been undertaken to explore the toxic effects of mercury on fish brain and to detect the spectral changes after the exposure. The samples were prepared after a chronic exposure of C. mrigalato sub lethal concentrations (1/20th and 1/10th of LC50 values 0.0206 ppm and 0.0402 ppm) of mercuric chloride for a period of 30 days. The samples were characterized for their structural study using X-ray diffraction (XRD), and it shows the amorphous nature. Scanning electron microscopy (SEM) technique has been used to study the surface morphology of C. mrigalabrain. The spectroscopic techniques are distinguished among the currently used method of monitoring animal tissues and their components. The IR, XRD, SEM and PL, were preferred as little preparation of samples is necessary and changes in the tissue chemistry produced by metal exposure are evident. Significant differences in absorbance areas and intensities between control and metal exposed tissues showed the alterations in biochemical content. The present study can be used to correlate the overall biochemical status of the tissues with histopathological changes undergone at cellular level after chronic exposure to mercury. © 2015 American Scientific Publishers. All rights reserved. Source


Shewale P.S.,Dong - Eui University | Yu Y.S.,Dong - Eui University | Kim J.H.,Chonnam National University | Bobade C.R.,Balwant College | Uplane M.D.,University of Pune
Journal of Analytical and Applied Pyrolysis | Year: 2015

Tin doped zinc oxide thin films were synthesized at low substrate temperature (473 K) by advanced spray pyrolysis technique for H2S gas sensing application. Equimolar solution of zinc acetate and tin chloride were used to grow Sn doped ZnO thin films. The effects of tin doping concentration on the structural, morphological, and gas sensing properties of Sn doped ZnO films were investigated. It is revealed that all films exhibit wurtzite structure and the average crystallite size reduce with increasing Sn doping concentration. With an increase in Sn doping, the peak position of the (0 0 2) plane was shifted to the low 2θ values indicating the lattice distortion incorporated into the film due to Sn doping. The results obtained from TEM and FESEM characterizations confirmed the XRD observations. Further, the as-characterized Sn doped ZnO films were profoundly studied for their H2S sensing performance. The H2S gas sensing characteristics that are mainly governed by an operating temperature were found to be optimum at 473 K. A maximum response of ∼31% to 30 ppm H2S was obtained at 473 K with reasonably fast response and recovery. Particularly, the 4 wt.% Sn doped ZnO sample exhibits selective behavior towards H2S on account of its surface morphological features. The H2S detection properties of the 4 wt.% Sn doped ZnO film were improved significantly on palladium (Pd) sensitization and the film demonstrated adequately stable sensing performance. © 2015 Elsevier B.V. All rights reserved. Source


Mane Gavade S.J.,Jaysingpur College | Nikam G.H.,Jaysingpur College | Dhabbe R.S.,Jaysingpur College | Sabale S.R.,Jaysingpur College | And 2 more authors.
Advances in Natural Sciences: Nanoscience and Nanotechnology | Year: 2015

In this study well defined silver nanoparticles were synthesized by using carambola fruit extract. After exposing the silver ions to the fruit extract, the rapid reduction of silver ions led to the formation of stable AgNPs in solution due to the reducing and stabilizing properties of carambola fruit juice. The synthesized NPs were analyzed by ultraviolet-visible spectroscopy and X-ray diffraction pattern. The as-synthesized AgNPs were phase pure and well crystalline with a face-centered cubic structure. The AgNPs were characterized by TEM to determine their size and morphology. The antimicrobial activity of the synthesized AgNPs was investigated against Escherichia coli and Pseudomonas aeruginosa by agar well diffusion method. This newly developed method is eco-friendly and could prove a better substitute for the current physical and chemical methods for the synthesis of AgNPs. © 2015 Vietnam Academy of Science & Technology. Source


Chavan V.R.,Balwant College | Muley D.V.,Shivaji University
Advanced Science Letters | Year: 2015

Lead is one of the limited class of elements that can be described as purely toxic. Lead displaces biologically important metals by interfering a variety of body’s chemical reactions in the animals. The present study deals with the spectroscopic response of brain of C. mrigala after lead exposure. The samples were prepared after a chronic exposure of C. mrigala to lead acetate (14.1 ppm and 28.2 ppm) for a period of 30 days. The desired tissue was obtained, dried at 60 °C for 72 hours and powdered. Then samples were characterized for their structural study using X-ray diffraction (XRD), and it shows the amorphous nature. Scanning electron microscopy (SEM) technique has been used to study the surface morphology of C. mrigala brain. For the detection of detailed structure of brain of C. mrigala, nuclear magnetic resonance spectroscopy (NMR) has been used. The sample was also studied for photo response by optical absorbance, transmittance and photoluminescence etc. The photoluminescence reveals that brain of C. mrigala is a good photoluminescent. The Gas chromatography mass spectrometry (GCMS) has been used for detection of compound. The major advantage of IR, XRD, SEM, PL, is that, solid biological samples can be measured directly without special sample preparation and changes in the tissue chemistry produced by metal exposure are evident. The present study can be used to correlate the overall biochemical status of the tissues with the pathological changes it has undergone due to chronic exposure of lead acetate. © 2015 American Scientific Publishers. All rights reserved. Source


Sartape A.S.,Balwant College | Patil S.A.,Shivaji University | Patil S.K.,Shivaji University | Salunkhe S.T.,Balwant College | Kolekar S.S.,Shivaji University
Desalination and Water Treatment | Year: 2015

In the present study, we have introduced a new effective and economical adsorbent, Mahogany fruit shell. This adsorbent has porous nature and essential active groups are present on their surfaces which enhance its capability of adsorption. Developed adsorbent was characterized with Fourier transform infrared spectroscopy, scanning electron microscopy, etc. techniques which also support to confirm successful adsorption. In the present study, batch adsorption experiments were carried out as a function of pH, contact period, dye concentration, adsorbent dosage, etc. for maximum removal of methylene blue, a basic dye from aqueous solution. Mahogany fruit shell adsorbent had succeeded to remove basic dye up to 99.05% at pH 9. The experimental data are fitted well to the Langmuir adsorption isotherm. Thermodynamic parameters such as (ΔG°), (ΔH°), and (ΔS°) were calculated, which indicated that the adsorption is spontaneous and endothermic in nature. The Mahogany fruit shell had showed great adsorption capacity to remove the methylene blue. © 2013, © 2013 Balaban Desalination Publications. All rights reserved. Source

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