Gujarathi J.R.,Pratap College
Der Pharma Chemica | Year: 2013
Heterocyclic base adducts of copper (II) complexes have been synthesized by the reaction of copper (II) chloride with 5-chloro-2-hydroxy acetophenone N(4) methyl thiosemicarbazone in presence of heterocyclic base like pyridine (py), 2, 2'-bipyridine (bipy), 1, 10-phenanthroline (Phen), α/β-picoline. Thiosemcarbazone has been characterized by 13C, 1H NMR as well as IR, electronic spectra. The magnetic and spectroscopic data indicate a square planner geometry for the four coordinate and a distorted square pyramidal for five coordinate complexes. The thiosemicarbazone and its copper (II) complexes show growth inhibitory activity against Pseudomonas Putida, Escherichia Coli, Aspergillus Niger and Candida Albicans. Thiosemicarbazone and its copper (II) complexes have been found antioxidant.
Gujarathi J.R.,Pratap College
Der Pharma Chemica | Year: 2013
We have synthesized heterocyclic base adducts [pyridine (py), 2, 2'-bipyridine (bipy), 1, 10-phenanthroline (Phen), α/ß-picoline] of Nickel (II) complexes by the reaction of Nickel (II) chloride with 5-chloro-2-hydroxy acetophenone N(4) methyl thiosemicarbazone in presence of heterocyclic base. Ligand was characterized by 13C, 1H NMR as well as IR, electronic spectra. The synthesized adducts were characterized by IR, ESI-MS, UV-visible, magnetic measurement, molar conductivity, TGA and DSC. The magnetic and spectroscopic data indicate a square planner geometry for the four coordinate and a distorted square pyramidal for five coordinate complexes. The Nickel (II) bipy and Nickel (II) ß-pico adducts show higher antioxidant activity.
Patil H.M.,Science and Commerce College |
Sawant D.K.,Science and Commerce College |
Bhavsar D.S.,Pratap College |
Girase K.D.,Svss Arts And Science College
Journal of Thermal Analysis and Calorimetry | Year: 2012
The growth of neodymium tartrate crystals was achieved in silica gel by single diffusion method. Optimum conditions were established for the growth of good quality crystals. Fourier transform infrared (FT-IR) spectroscopic study indicates the presence of water molecules and tartrate ligands and suggests that tartrate ions are doubly ionised. The thermal behaviour of the material was studied using thermogravimetry (TG), differential thermal analysis (DTA), derivative thermogravimetry (DTG) and differential scanning calorimetry (DSC). Thermogravimetric analysis support the suggested chemical formula of the grown crystal to be Nd2(C4H4O6) 3·7H2O, and the presence of seven water molecules as water of hydration. It is shown that the material is thermally stable up 45 °C beyond which it decomposes through many stages till the formation of neodymium oxide (Nd2O3) at 995 °C. The decomposition pattern is reported to be typical of a hydrated metal tartrate. © Akadémiai Kiadó, Budapest, Hungary 2011.
Patil V.S.,University of Mumbai |
Patil N.S.,Pratap College |
Timol M.G.,Veer Narmad South Gujarat University
International Journal of Non-Linear Mechanics | Year: 2015
A similarity analysis of three-dimensional boundary layer equations of a class of non-Newtonian fluid in which the stress, an arbitrary function of rates of strain, is studied. It is shown that under any group of transformation, for an arbitrary stress function, not all non-Newtonian fluids possess a similarity solution for the flow past a wedge inclined at arbitrary angle except Ostwald-de-Waele power-law fluid. Further it is observed, for non-Newtonian fluids of any model only 90° of wedge flow leads to similarity solutions. Our results contain a correction to some flaws in Pakdemirli's  (1994) paper on similarity analysis of boundary layer equations of a class of non-Newtonian fluids. © 2014 Elsevier Ltd. All rights reserved.
Joshi M.,North Maharashtra University |
Mundada M.,Pratap College
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2013
Image segmentation is an essential step in almost all image processing applications and very critical particularly for medical images. Image segmentation procedure segments an image into appropriate number of regions. Several techniques have been proposed and experimented to obtain effective image segmentation. Clustering is one of the commonly used image segmentation techniques. There exist ambiguous regions in an image and segmenting these regions correctly is a challenging task. Different clustering approaches are explored by researchers to deal these ambiguous regions in order to obtain better image segmentation. We propose rough clustering approach to explicitly determine ambiguous regions from an image. Once ambiguous regions are identified segmentation would be easier. In this paper we present our experiments of image segmentation using crisp K-means clustering algorithms and rough K-means (RKM) clustering algorithms. With the help of various images we demonstrate that RKM algorithm is able to determine ambiguous regions distinctly whereas K-means forced pixels of ambiguous regions to either region. Furthermore, we analyze how other soft clustering techniques deals with ambiguous regions. © 2013 Springer-Verlag.
Patil T.K.,Arts And Com College |
Saraf K.B.,Pratap College
Journal of Nano- and Electronic Physics | Year: 2011
In the present investigation, crystals of bismuth Tri Sulphide (Bi 2S 3) were grown by a simple gel technique using single diffusion method. The optimum growth conditions were established by varying various parameters such as pH of gel solution, gel concentration, gel setting time, concentration of reactant etc. Gel was prepared by mixing sodium meta silicate (Na 2SiO 35H 2O), glacial acetic acid (CH 3COOH) and supernant bismuth chloride (BiCl 3) at pH value 4.4 and transferred in glass tube of diameter 2.5 cm and 25 cm in length. The mouth of test tube was covered by cotton plug and kept it for the setting. After setting the gel, it was left for aging. After 13 days duration the second supernant H 2S water gas solution was poured over the set gel by using pipette then it was kept undisturbed. After 72 hours of pouring the second supernatant, the small nucleation growth was observed at below the interface of gel. The good quality Orthorhombic or Rhombus Bi 2S 3 crystals were grown in 31 days. These grown crystals were characterized by Magnetic Susceptibility, Electrical Conductivity, EDAX and SEM. © 2011 SumDU.
Kale M.S.,Pratap College |
Toda Y.R.,Pratap College |
Bhole M.P.,Pratap College |
Bhavsar D.S.,Pratap College
Electronic Materials Letters | Year: 2014
Nano structured thin films having different thickness of CdS were deposited by thermal evaporation techniques, onto precleaned amorphous glass substrate at room temperature. The structural properties of films were evaluated by XRD, Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM). The quantitative analysis was done by Energy Dispersive Analysis for x-ray to determine atomic % of the material used. The optical band gaps of the films were measured by using optical absorption spectra. Thermo Electrical parameters such as Fermi energy (0.098 to 0.006 eV), absorption coefficient (1.04 to 1.16) have been estimated. The x-ray diffraction analysis confirms that films are polycrystalline in nature having orthorhombic structure with a preferential orientation along the (040) plane. The degree of such a preferred orientation was found to increase with film thickness. The lattice parameters (a = 14.315, b = 14.568 and c = 14.074 Å) size (D) were calculated and found to be 242.9 nm. Unit cell volume is found to be 2935. SEM investigation confirms that films were uniformly deposited over the surface and particles were granular in nature. The particle size was determined by using SEM and found to be 6.88-10.86 nm. It is found that CdS is direct band gap material having value of 2.42 eV. © 2014 The Korean Institute of Metals and Materials and Springer Science+Business Media Dordrecht.
Dalal P.V.,Pratap College |
Saraf K.B.,Pratap College
Bulletin of Materials Science | Year: 2011
Single crystals of strontium oxalate have been grown by using strontium chloride and oxalic acid in agar.agar gel media at ambient temperature. Different methods for growing crystals were adopted. The optimum conditions were employed in each method by varying concentration of gel and reactants, and gel setting time etc. Transparent prismatic bi-pyramidal platy-shaped and spherulite crystals were obtained in various methods. The grown crystals were characterized with the help of FT.IR studies and monoclinic system of crystals were supported with lattice parameters a = 9·67628 A, b = 6·7175 A, c = 8·6812 A, β = 113·566., and V = 521·84 A3 calculated from X-ray diffractogram. © Indian Academy of Sciences.
Shirode P.R.,Pratap College
Asian Journal of Chemistry | Year: 2012
The mixed ligand complexes of the type [M(L 1)(L 2)]Cl 2 (where M= Mn(II), Fe(III), Co(II), Ni(II) and Cu(II) and L 1 = acetophenone semicarbazone, L 2= cyclohexanone semicarbazone) have been synthesized by the reactions of metal chlorides with two different semicarbazone compounds in 1:1:1 molar ratios. The resulting complexes have been characterized on the basis of elemental analysis, magnetic measurement, IR and electronic spectra, conductivity measurement. The metal complexes shows ratio 1:1:1 with metal, ligand L 1and ligand L 2.The ligands acts as bidentate ligands and are bonded through oxygen and nitrogen to metal ion. The two co-ordination positions are occupied by two water molecules. The complexes have octahedral structure.
Sonar A.N.,Commerce and Science College |
Pawar N.S.,Pratap College
Rasayan Journal of Chemistry | Year: 2010
Refractive index, molar refractivities and molar polarizability constant of heterocyclic compounds such as 2-Thiazol-4-yl-1H benzimidazole, 5-nitro-2-Thiazol-4-yl-1H benzimidazole and 2- (2-Thiazol-4-yl)-1H benzimidazole-1-yl-acetic acid have been studied in Ethanol, Methanol, Acetone, DMF, and THF media at 303 K ± 0.1°C temperature and different concentrations (0. 625x10-3 to10.0x 10-3M). The values of molar refraction (Rm) and molar polarizability (α) constant are found to be decreased with decreasing concentration of solute in solvent. Viscosity coefficient (A, B) evaluate by using john-dole equation. These parameters throw the light on the solute-solvent interaction and solute-solute interaction.