Kose T.D.,Acs College
Journal of Composite Materials | Year: 2011
Polyaniline-containing transition metal salts were synthesized by oxidizing the complex of aniline with corresponding metal salts in solution. The effect of transition metal salts on the electrical conductivity of polyaniline (Pani) was discussed in details. The as-prepared products were characterized by FT-IR spectroscopy. The transition metal has been successfully incorporated into the polymer, which affects transport properties of the composites; the fact is supported by the ample of experimental results and characterization evidences. © 2011, The Author(s). All rights reserved.
Shirole G.D.,Asc College |
Shirole G.D.,Ssgm College |
Kadnor V.A.,Acs College |
Tambe A.S.,Asc College |
Shelke S.N.,Ssgm College
Research on Chemical Intermediates | Year: 2016
Abstract: We present a facile and environmentally benign protocol for synthesis of variously substituted imidazole derivatives via multicomponent condensation of benzil, primary aromatic amine, substituted 1,3-diphenyl-1H-pyrazole-4-carbaldehyde, and ammonium acetate in presence of 1-butyl-3-methyl-1-imidazolium tetrafluoroborate [BMIM][BF4] as catalyst under conventional reflux as well as microwave irradiation condition. The one-pot synthesis, facile solvent-free condition, and good isolated yield illustrate the utility of this green approach. The structural features are derived using analytical tools including fourier transform infrared (FTIR), Liquid chromatography-mass spectrometry (LCMS), and 1H and 13C nuclear magnetic resonance (NMR) spectroscopy. Graphical Abstract: [Figure not available: see fulltext.] © 2016 Springer Science+Business Media Dordrecht
Kale M.,KTH Royal Institute of Technology |
Dudhe N.,Acs College |
Kasambe R.,IBA Inc |
Chakane S.,University of Pune |
Bhattacharya P.,KTH Royal Institute of Technology
International Journal of Applied Environmental Sciences | Year: 2012
The avifaunal diversity and density in Amravati city, Maharashtra, India was studied for a period of one month. Amravati city has got two reservoirs in the city limits itself namely, the Chhatri Lake and the Wadali Lake. The city has got well-protected by greenery, Amravati had remained an important birding place. During the study of five different transects lines 30 plants species and 61 birds species were observed, during study in which 57 are resident species and 4 are winter migrant. Highest population of Rose-ringed Parakeet (Psittacula krameri) was recorded in this study. The visitors include Black Red Start (Phoenicurus ochruros), Common Sandpiper (Tringa hypoleucos) Pallid Harrier (Circus macrourus), White Wagtail (Motacilla alba) which are found in the study area throughout the study period. According to status of birds, we have selected total 10 birds, which are found in and around city areas. Maximum and Minimum average also calculate, according quantity of birds. Maximum number of birds was found in highly urbanized area i.e 2860 and minimum in industrial area i.e.612. According to species variation, maximum number of bird's species was found 46 in Reserve forest and minimum 16 in urbanized area. © Research India Publications.
Kuchekar S.R.,Acs College |
Shelar Y.S.,Acs College |
Aher H.R.,Acs College |
Han S.H.,Hanyang University
Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy | Year: 2013
A simple and selective method is developed for the extraction spectrophotometric determination of ruthenium(III) using o-methylphenyl thiourea (OMPT) as a chromogenic chelating ligand. The basis of the proposed method is ruthenium(III)-OMPT complex formation in aqueous hydrochloric acid media (3.0 mol L-1) after 5.0 min heating on a boiling water bath and the complex formed is extracted into chloroform. The absorbance of green colored ruthenium(III)-OMPT complex is measured at 590 nm against the reagent blank. Beer's law was obeyed up to 42.5 μg mL-1 of ruthenium(III) and the optimum concentration range is 7.56-39.81 μg mL-1 of ruthenium(III) as evaluated by Ringbom's plot. Molar absorptivity and Sandell's sensitivity of ruthenium(III)-OMPT complex in chloroform are 2.34 × 103 L mol-1 cm-1 and 0.043 μg cm -2 respectively. The composition of ruthenium(III):OMPT complex (1:2) was established from slope ratio method, mole ratio method and Job's continuous variation method. Complex was stable for more than 48 h. The interfering effect of various foreign ions was studied and suitable masking agents are used wherever necessary to enhance the selectivity of the method. Proposed method is successfully applied for determination of ruthenium(III) from binary and ternary synthetic mixtures, synthetic mixtures corresponding to fissium alloy and ruthenium catalyst. Repetition of the method was checked by finding relative standard deviation (R.S.D) for 10 determinations which was 0.23%. A scheme for sequential separation of palladium(II), ruthenium(III), rhodium(III) and platinum(IV) has been developed. © 2013 Elsevier B.V. All rights reserved.
Pawar M.J.,ACS College |
Nimkar S.D.,ACS College |
Nandurkar P.P.,ACS College |
Tale A.S.,ACS College |
And 2 more authors.
Chalcogenide Letters | Year: 2010
Here we are reporting the synthesis of Zn1-xSnxS (x = 0, 0.1, 0.2, 0.3) nanoparticles and their photoluminescence properties. Zn1-xSnxS nanoparticles were synthesized by using thiourea as a capping agent. All the samples were characterized by X-ray diffraction technique. XRD patterns show the particle size in the range 12-24.5 nm. It was found that, the addition of Sn2+ ions causes the change in UV and PL spectra of ZnS nanoparticles. A broad and intense emission peak occurs at 460 nm for Zn0.8Sn0.2S nanoparticles.
Pawar S.D.,Acs College
Journal of Earth System Science | Year: 2013
In the present study, the observation of indoor air ion concentration at a rural site has been carried out for the first time. These indoor observations are compared with outdoor air ion concentration. Net charge can be introduced into the atmosphere by processes such as combustion, rainfall and ultraviolet radiation. As compared to indoors, average air ions of both the polarities at outdoors are higher. Moreover, the air ion concentrations, experience large fluctuations during daytime, as compared to nighttime values. Positive and negative air ion concentrations are lower and uniform throughout the night both for indoor and outdoor conditions. Pollution index is more or less unity for outdoors in all-the-time period, which is good for human health. Due to limited sources of air ions indoors, it is observed that pollution index decreases from 00:00-02:00 hours and minimum is reached during 12:00-14:00 hours for indoors. During 00:00-02:00 hours, the indoor pollution index is 1.55, which is very harmful to human health. © Indian Academy of Sciences.
Firke N.P.,Fergusson College |
Markandeya A.G.,Fergusson College |
Patil R.,University of Pune |
Gholap H.M.,Fergusson College |
And 2 more authors.
Research Journal of Pharmacy and Technology | Year: 2015
In present study, we report synthesis of Betulinan C and its analogs and explore its biological application as an agent inhibiting the biofilm formation in Pseudomonas aeruginosa O1. P. aeruginosa biofilm is prominently inhibited 80- 83% by compounds 2a and 1b at 25 µg/mL. While other analogs show a mixed response. Biofilm inhibition is further confirmed by Scanning Electron Microscopy. The present study is important as Betulinan C has been produced by a fungus of order Chaetothyriales and there are no chemical methods yet reported for its synthesis. The inhibition of biofilm is due to inhibition of quorum sensing (QS) phenomenon. Contrary to the traditional bioactive molecules, QS phenomenon is not essential for the survival of cells, and therefore, present compounds will not create a selection pressure of antibiotics resistance in cells on which they act. © RJPT All right reserved.
Pawar M.J.,ACS College |
Chaure S.S.,ACS College |
Deshmukh S.B.,ACS College
Journal of Ceramic Science and Technology | Year: 2010
The influence of cobalt doping on the densification and activation energy of Ce0.9Sm0.1O2-δ was studied. Solid solutions of Ce0.9-xCoxSm0.1O 2-δ (x = 0, 0.05, 0.1 and 0.15) were prepared by means of a modified EDTA-glycol method. It was found that the degree of densification increases with an increasing concentration of cobalt. Almost full densification could be achieved at a sintering temperature of 1500 °C. The highest density (99.3 %) and minimum activation energy (0.81 eV) were observed for the composition Ce0.8Co0.1Sm0.1O 2-δ. © 2010 Göller Verlag.
Pawar S.D.,Acs College
AIP Conference Proceedings | Year: 2013
Ion-induced nucleation is a special case of heterogeneous nucleation. In ion-induced nucleation the vapors condense around an ion. Since the energy barrier for ion-induced nucleation is lower than for the homogeneous type, nucleation should always occur via ions if they are present. In January average positive air ions were 11×102 ions per cm3, starts decreasing and reaches to minimum (1.8 × 102 ions per cm 3) in April. From May starts increasing and reaches to 9.9 × 102 ions per cm3 in June. In July positive air ions again decreases to 1.9 × 102 ions per cm3. Average positive air ions were 8.4 in August starts decreasing and reaches minimum (2.1 × 102 ions per cm3) in October. From the October again starts increasing and reaches maximum (7.6 × 102 ions per cm3) in December. © 2013 AIP Publishing LLC.
PubMed | Acs College
Type: | Journal: Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy | Year: 2013
A simple and selective method is developed for the extraction spectrophotometric determination of ruthenium(III) using o-methylphenyl thiourea (OMPT) as a chromogenic chelating ligand. The basis of the proposed method is ruthenium(III)-OMPT complex formation in aqueous hydrochloric acid media (3.0molL(-1)) after 5.0min heating on a boiling water bath and the complex formed is extracted into chloroform. The absorbance of green colored ruthenium(III)-OMPT complex is measured at 590nm against the reagent blank. Beers law was obeyed up to 42.5gmL(-1) of ruthenium(III) and the optimum concentration range is 7.56-39.81gmL(-1) of ruthenium(III) as evaluated by Ringboms plot. Molar absorptivity and Sandells sensitivity of ruthenium(III)-OMPT complex in chloroform are 2.3410(3)Lmol(-1) cm(-1) and 0.043gcm(-2) respectively. The composition of ruthenium(III):OMPT complex (1:2) was established from slope ratio method, mole ratio method and Jobs continuous variation method. Complex was stable for more than 48h. The interfering effect of various foreign ions was studied and suitable masking agents are used wherever necessary to enhance the selectivity of the method. Proposed method is successfully applied for determination of ruthenium(III) from binary and ternary synthetic mixtures, synthetic mixtures corresponding to fissium alloy and ruthenium catalyst. Repetition of the method was checked by finding relative standard deviation (R.S.D) for 10 determinations which was 0.23%. A scheme for sequential separation of palladium(II), ruthenium(III), rhodium(III) and platinum(IV) has been developed.