Maharashtra Udayagiri Mahavidyalaya

Udgīr, India

Maharashtra Udayagiri Mahavidyalaya

Udgīr, India

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Pawar V.P.,Maharashtra Udayagiri Mahavidyalaya | Patil A.V.,Maharashtra Udayagiri Mahavidyalaya | Mehrotra S.C.,University for Information Science and Technology
Journal of Molecular Liquids | Year: 2010

The complex permittivity spectra of dimethylene chloride-N, N dimethylformamide were determined in the frequency range of 10 MHz to 20 GHz using time domain reflectometry (TDR) in the temperature range 15 °C to 45 °C for 11 different concentrations of the system. The dielectric parameters viz. static dielectric constant (ε0) and relaxation time (τ) have been obtained by the least squares fit method. Excess properties and Kirkwood correlation factor of the mixtures have been determined. In the case of dimethylene chloride excess permittivity is found to be negative, whereas it is positive in N, N dimethylformamide rich region, except 15 °C. The static dielectric constants for the mixtures have been fitted with the modified Bruggeman model. © 2010 Elsevier B.V. All rights reserved.


Pawar V.P.,Maharashtra Udayagiri Mahavidyalaya
Journal of Molecular Liquids | Year: 2015

The dielectric and thermodynamic properties of dimethylene chloride with formamide have been determined at 10, 15, 20 and 25 °C using time domain reflectometry (TDR) for 11 different concentrations of the system. The dielectric properties viz. static dielectric constant (ε0) and relaxation time (τ) have been obtained by the least squares fit method with Debye model. The dielectric constant and relaxation time increase with increasing the mole fraction of formamide in dimethylene chloride of the system. The excess inverse relaxation time is found to be negative in the system and excess permittivities are found to be negative in dimethylene chloride and positive in the formamide rich region for all temperatures. The thermodynamic parameters such as free activation energy (ΔG), molar enthalpy of activation (ΔH) and molar entropy of activation (ΔS) have been determined. © 2015 Elsevier B.V. All rights reserved.


Sandikar B.M.,Maharashtra Udayagiri Mahavidyalaya | Awasthi R.S.,Badrinarayan Barwale Mahavidyalaya
Asian Journal of Microbiology, Biotechnology and Environmental Sciences | Year: 2010

Phytopathogenic fungal cultures were isolated from infected tomato plants and identified on the basis of morphological and cultural characters as Pythium and Fusarium species. One hundred thermostable bacterial cultures were isolated from rhizosphere soil samples of healthy tomato plants, on nutrient agar and putatively identified as Bacillus species on the basis of morphological characters and sporulation ability. These isolates were tested for primary screening of antagonists against phytopathogenic Fusarium and Pythium species, by dual culture method on potato dextrose agar (PDA) plates. The isolates showing positive results were tested for their antifungal potency using seed plate and dual broth culture technique. Four potent antifungal Bacillus isolates were identified to species level on the basis of biochemical characters and 16S r-RNA sequencing as B. thuringiensis184, B. cereus 220, B. cereus 228 and B. subtilis 252. The extent of antifungal activity was higher in dual broth culture than seed plate method. These potent antifungal Bacillus isolates were used to prepare bioformulations and found significant to protect tomato plants from fungal infections. © Global Science Publications.


Achole B.D.,Shri. Havagiswami Mahavidyalaya | Pawar V.P.,Maharashtra Udayagiri Mahavidyalaya
Journal of Physics: Conference Series | Year: 2014

The complex permittivity spectra for tert-butyl alcohol(TB) with n-propanol(nP) were determined over the frequency range of 10 MHz to 20 GHz using the time domain reflectometry (TDR) in the temperature range of 25°C to 55°C for 11 different concentrations of the system. The static dielectric constant (ε0) and relaxation time (τ) have been determined these spectra using the Debye model. Excess properties and Kirkwood correlation factor of the mixtures have been determined. The excess permittivity is found to be positive in the tart-butyl alcohol rich region and negative in the n-Propanol rich region. However, the excess inverse relaxation time has different trend. The static dielectric constants for the mixtures have also been fitted with the modified Bruggeman model by assuming an additional parameter in the model. © Published under licence by IOP Publishing Ltd.


Achole B.D.,Shri Havagiswami Mahavidyalaya | Patil A.V.,Maharashtra Udayagiri Mahavidyalaya | Pawar V.P.,Maharashtra Udayagiri Mahavidyalaya | Mehrotra S.C.,University for Information Science and Technology
Journal of Molecular Liquids | Year: 2011

The complex permittivity spectra for tert-butyl alcohol (TB) with 2-propanol (2P) were determined over the frequency range of 10 MHz to 20 GHz using the time domain reflectometry (TDR) in the temperature range 25 °C to 55 °C for 11 different concentrations of the system. The static dielectric constant (ε0) and relaxation time (τ) have been determined these spectra using the Debye model. Excess properties and Kirkwood correlation factor of the mixtures have been determined. The excess permittivity is found to be positive in the tert-butyl alcohol rich region and negative in the 2-propanol rich region. However, the excess inverse relaxation time has different trend. The static dielectric constants for the mixtures have also been fitted with the modified Bruggeman model by assuming an additional parameter in the model. It appears that structure of the TB-2P dimer in the TB rich region favors parallel dipole orientation, whereas in the 2P rich region, it favors antiparallel orientation. © 2011 Elsevier B.V. All rights reserved.


Acharya A.P.,Swami Ramanand Teerth Marathwada University | Kamble R.D.,Maharashtra Udayagiri Mahavidyalaya | Patil S.D.,Swami Ramanand Teerth Marathwada University | Hese S.V.,Swami Ramanand Teerth Marathwada University | And 4 more authors.
Chemical Papers | Year: 2014

A novel series of indeno-benzothiazepine derivatives was synthesised via a "green" route. Synthesis of these compounds involves the treatment of dinucleophiles such as 2-aminobenzenethiols with α,β-unsaturated ketones in poly(oxyethylene) (poly(ethylene glycol), PEG-400) catalysed by acetic acid. The synthone α,β-unsaturated ketones were obtained by Claisen-Schmidt condensation of indan-1-one with substituted pyrazole-2-carbaldehydes prompted by bleaching earth (pH 12.5) as catalyst and PEG-400 as "green" reaction solvent. Screening of all the synthesised compounds for antimicrobial activity revealed that most of these compounds exhibited moderate to significant antimicrobial activity. © 2013 Institute of Chemistry, Slovak Academy of Sciences.


Keche A.P.,Maharashtra Udayagiri Mahavidyalaya | Hatnapure G.D.,Maharashtra Udayagiri Mahavidyalaya | Tale R.H.,S R T M University | Rodge A.H.,S R T M University | And 3 more authors.
Medicinal Chemistry Research | Year: 2013

A series of substituted N-(quinolin-4-yl)ethanediamine phenyl urea derivatives of biological interest were prepared by sequential quinoline synthesis, chlorination, and substitution reaction followed by reaction of resulting amine with different aryl isocyanates. All synthesized compounds (1-13) were screened for their pro-inflammatory cytokines (TNF-α and IL-6) and antimicrobial activity (antibacterial and antifungal). Biological activity evaluation study revealed that among all the compounds screened, compounds 4 and 6 were found to have promising anti-inflammatory activity (up to 78-71 % TNF-α and 96-90 % IL-6 inhibitory activity) at a higher concentration of 10 μM with reference to standard dexamethasone (72 % TNF-α and 86 % IL-6 inhibitory activities at 1 μM). Compounds 6, 8, 10, and 11 overall exhibited promising antimicrobial activity at MIC values ranging from 10 to 30 μg/mL against all the selected pathogenic bacteria and fungi. © 2012 Springer Science+Business Media, LLC.


Patil A.V.,Maharashtra Udayagiri Mahavidyalaya | Pawar V.P.,Maharashtra Udayagiri Mahavidyalaya
Journal of Molecular Liquids | Year: 2013

Microwave dielectric spectra for binary mixtures of ethanolamine with diethanolamine have been determined over the frequency range of 10 MHz to 20 GHz, at different temperatures, using a time domain spectroscopy (TDS) method at 11 concentrations. The values of the dielectric loss (ε″) have been plotted against the dielectric constant (ε′) in the complex plane. The static dielectric constant (ε0), dielectric constant at high frequency (ε), and relaxation time (τ) have been determined using the Debye model, a single relaxation process. The dielectric behavior indicates a change of phase from a semi-solid to a liquid state. The effects of molecular size and number of OH group molecules on H-bond molecular interactions from Kirkwood correlation factors are presented. © 2013 Elsevier B.V.


Patil A.V.,Maharashtra Udayagiri Mahavidyalaya | Shinde G.N.,Indira Gandhi Mahavidyalaya | Pawar V.P.,Maharashtra Udayagiri Mahavidyalaya
Journal of Molecular Liquids | Year: 2012

The complex permittivity spectra for ethanolamine-diethanolamine binary mixture have been determined over the frequency range of 10 MHz to 20 GHz using time domain reflectometry (TDR) method in the temperature rang 35 °C to 50 °C for 11 different concentrations of the system. The present work reveals molecular interaction between same multi-functional groups [- OH and - NH 2] of the alkanolamines (ethanolamine and diethanolamine) with different molecular size (carbon chain), on the basis of evaluation the static dielectric constants, relaxation time, the corresponding excess properties, the Redlich-Kister coefficients up to their order and Kirkwood correlation factor of the mixture have been determined. The value of static dielectric constant decreases and relaxation time increases with increasing concentrations of DEA in ETA for all temperatures. The static dielectric constants for the mixture have been fitted with the modified Bruggeman model. © 2012 Elsevier B.V. All rights reserved.


Pawar V.P.,Maharashtra Udayagiri Mahavidyalaya | Patil A.V.,Maharashtra Udayagiri Mahavidyalaya
Fluid Phase Equilibria | Year: 2014

The complex permittivity spectra of dimethylene chloride with N-methylformamide have been determined at 10, 15, 20 and 25°C using time domain reflectometry (TDR) for 11 different concentrations of the system. The complex permittivity spectra shows that the dielectric constant is high in the lower frequency region and decreases with an increase in frequency and the peak of dielectric loss curves shifted toward higher frequencies when the temperature increases in the system. The dielectric parameters viz. static dielectric constant (e{open}0) and relaxation time (τ) have been obtained by the least squares fit method with Debye model. For temperature range, considered here, the dielectric constant and relaxation time increase with increasing the mole fraction of n-methylformamide. The excess permittivity and excess inverse relaxation time are found to be negative in the system. © 2014 Elsevier B.V.

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