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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. Source


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. Source


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. Source


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. Source


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. Source

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