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Ubale A.U.,Government Vidarbha Institute of Science and Humanities
Materials Chemistry and Physics | Year: 2010

Nanostructured Bi2S3 thin films have been prepared onto amorphous glass substrates by chemical bath deposition method at room temperature using bismuth nitrate and sodium thiosulphate as cationic and anionic precursors with EDTA as complexing agent in aqueous medium. The X-ray diffraction study reveals that the films deposited without the complexing agent are amorphous in nature and becomes nanocrystalline in the presence of EDTA. The resistivity for the films prepared from EDTA complexed bath is decreased due to the improvement in grain structure. The decrease in optical bandgap and activation energy is observed as the thickness of the film varies from 45 to 211 nm on account of the variation of the volume of complexing agent in reaction bath. Studies reveal that the growth mechanism of Bi2S3 gets affected in the presence of complexing agent EDTA and shows impact on structural, electrical and optical properties. © 2010 Elsevier B.V. All rights reserved.


Shinde R.G.,Government Vidarbha Institute of Science and Humanities
International Journal of Pharma and Bio Sciences | Year: 2013

Effect of temperature on the chemiluminescence (CL) of Luminol in some aqueous aliphatic amines such as ethyl amine (EA), diethyl amine (DEA), and triethyl amine (TEA), have been studied and reported. On the basis of experimental results, it is found that the chemiluminescence intensity initially increased with temperature, attains an optimum value of particular temperature and then decrease on further increase in temperature. It is also found that maximum CL intensity (I max) of chemiluminescence of Luminol founds in diethyl amine.


Ubale A.U.,Government Vidarbha Institute of Science and Humanities | Ibrahim S.G.,Government Vidarbha Institute of Science and Humanities
Journal of Alloys and Compounds | Year: 2011

Spray pyrolysis method which is simple as well as economic was used for the preparation of ternary nanostructured FeCdS3 thin films onto glass substrates from ferric nitrate and cadmium chloride as Cd and Fe source and acetic acid as a complexing agent. The prepared films were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and optical absorption techniques. The structural, electrical, optical and morphological properties of FeCdS3 thin films were influenced by quantity of acetic acid in spray solution. The X-ray spectrum and SEM reveal that the FeCdS 3 shows transition from nanocrystalline to amorphous phase depending on concentration of acetic acid. Optical band-gap of the amorphous and nanocrystalline film is found 2.40 and 2.65 eV, respectively. Nanocrystalline films have dark resistivity of the order of 103 Ω cm whereas amorphous films have 104 Ω cm. Thermoelectric power (TEP) measurement studies reveal that the films have p-type conductivity. It also shows that amorphous film generates less thermo-emf as compared to nanocrystalline film. © 2010 Elsevier B.V. All rights reserved.


Kalaskar M.M.,Government Vidarbha Institute of Science and Humanities
Der Pharma Chemica | Year: 2012

For development of human life metals are essential. Contaminated vegetables may produce health defect on human being by intaking of heavy metal. This study investigated the level of four different heavy metals which are toxicmetals (Cu,Cd,Pb,Cr) were determined in different vegetable from Amba Nala of Amravati District.Heavy metalswere extracted from vegetables using dry ashing method.AAS (Thermo Scientific Pvt. Ltd., India, Model No.AA- 303) as used toevaluate the level of these metals in the vegetables. Concentration of lead and cadmium in all the vegetables tested even after exceed washing. Heavy metal content was found highest in unwashed sample than washed sample and washed sample than boiled sample. Overall, this study indicates that vegetables are contaminated by toxic heavy metals present in sewage water.


Ubale A.U.,Government Vidarbha Institute of Science and Humanities | Bargal A.N.,Government Vidarbha Institute of Science and Humanities
Indian Journal of Physics | Year: 2010

This paper reports the preparation of photosensitive nanostructured CdS thin films by Successive Ionic Layer Adsorption and Reaction (SILAR) method at room temperature. To obtain good quality CdS thin films, preparative conditions such as concentration of cationic and anionic precursors, adsorption and rinsing time durations etc. are optimized. The structural, optical, and electrical characterizations of the as-deposited and annealed CdS thin films were carried out using X-ray diffraction, scanning electron microscopy, optical absorption and electrical resistivity methods. The photoconductivity studies showed that the annealed films are more than that photosensitive. The TEP measurement shows that deposited films are of n-type. © 2010 IACS.


Dabhadkar D.,Government Vidarbha Institute of Science and Humanities | Zade V.,Government Vidarbha Institute of Science and Humanities
Indian Journal of Experimental Biology | Year: 2012

To evaluate the potential abortifacient activity of the aqueous, alcohol, ethyl acetate and chloroform extracts of P. rubra pod in female albino rats 50, 100 and 200 mg/kg body weight doses of each extract were administered from day 11 to 15 of pregnancy and animals were allowed to go full term. The phytochemical screening revealed the presence of alkaloids, flavonoids, simple phenolics, steroids, tannins and saponins. Clinical toxicity symptoms such as respiratory distress, salivation, weight loss, dull eyes, diarrhea, and change in the appearance of fur as well as mortality were not observed in the animals at any period of the experiment. All the four extracts of P. rubra pods exhibited abortifacient activity (8-100%). The extracts significantly reduced the number of live fetuses, whereas the resorption index and post implantation losses increased significantly. The % of abortion was found to be highest (100%) with 200 mg/kg dose of alcoholic extract of P. rubra pods.


Ubale A.U.,Government Vidarbha Institute of Science and Humanities | Bargal A.N.,Government Vidarbha Institute of Science and Humanities
Materials Research Bulletin | Year: 2011

Recently ternary semiconductor nanostructured composite materials have attracted the interest of researchers because of their photovoltaic applications. Thin films of (NiS)x(CdS)(1-x) with variable composition (x = 1-0) had been deposited onto glass substrates by the successive ionic layer adsorption and reaction (SILAR) method. As grown and annealed films were characterised by X-ray diffraction, scanning electron microscopy and EDAX to investigate structural and morphological properties. The (NiS)x(CdS)(1-x) films were polycrystalline in nature having mixed phase of rhombohedral and hexagonal crystal structure due to NiS and CdS respectively. The optical and electrical properties of (NiS) x(CdS)(1-x) thin films were studied to determine compsition dependent bandgap, activation energy and photconductivity. The bandgap and activation energy of annealed (NiS)x(CdS)(1-x) film decrease with improvement in photosensitive nature. © 2011 Elsevier Ltd. All rights reserved.


Ubale A.U.,Government Vidarbha Institute of Science and Humanities | Sakhare Y.S.,Government Vidarbha Institute of Science and Humanities
Journal of Physics and Chemistry of Solids | Year: 2013

The versatile spray pyrolysis technique was employed to prepare thin films of iron selenide on glass substrates at different substrate temperatures. The deposition temperature was varied between 473 and 673 K. The as-deposited films were characterized by X-ray diffraction (XRD), SEM, optical and electrical characterization techniques. The X-ray studies reveal that the films are nanocrystalline with tetragonal structure and exhibit (101) preferred orientation. The SEM and AFM studies indicate that the film surface is homogenous with no cracks or pinholes and well covers the glass substrate. The film thickness was found to vary from 110 to 230 nm with substrate temperature. The optical band gap was found to decrease from 2.92 to 2.68 eV depending on deposition temperature. The resistivity of p-type FeSe film is of the order of 8×104 Ω cm and it decreases to 1.5×104 Ω cm as substrate temperature is increased from 473 K to 673 K. © 2013 Elsevier Ltd.


Ubale A.U.,Government Vidarbha Institute of Science and Humanities | Deshpande V.P.,Government Vidarbha Institute of Science and Humanities
Journal of Alloys and Compounds | Year: 2010

ZnO has become promising versatile member in semiconductor technology due to its well-known performance in electronics, optics and photonics. In present investigation we have reported the impact of manganese incorporation on electrical optical and structural properties of spray deposited ZnO thin films. The study of X-ray diffraction suggests that the films are nanocrystalline in nature having hexagonal wurtzite type crystal structure. The electrical resistivity measurement shows films are semiconducting and it decreases with increase in doping percentage. Optical absorption studies show that the band-gap energy is decreased from 3.45 to 2.64 eV as the doping percentage was increased from 0 to 5 at.%. The scanning electron micrographs (SEM) of doped ZnO thin films shows network of nanotubes. The H2S sensing behaviour of films is also investigated. © 2010 Elsevier B.V. All rights reserved.


Banewar V.,Government Vidarbha Institute of Science and Humanities
Journal of Chemistry | Year: 2013

Pyrazolines are well known and important nitrogen containing 5-membered heterocyclic compounds. In the present investigation, a series of various heteroaryl chalcones and pyrazolines were synthesized by condensing formylquinolines with diverse ketones. The newly synthesized 2-pyrazolines were characterized on the basis of elemental analysis and spectroscopic data. All of the newly synthesized target compounds were selected by the NCI for in vitro biological evaluation. These active compounds exhibited broad spectrum of various biological activities. Most of the compounds showed potent activity. © 2013 Vishal Banewar.

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