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.
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.
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.
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.
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.