Devchand College

Kolhāpur, India

Devchand College

Kolhāpur, India
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Ramteke A.A.,Devchand College | Chavan S.P.,Devchand College
AIP Conference Proceedings | Year: 2016

The solute-solvent interactions of complexes of chloro substituted pyrazole with Cu (II) and Tb (III) metal ions as a function of temperature has been studied by measuring density and ultrasonic velocity at different temperatures. The values of density and ultrasonic velocity have been used to determine the adiabatic compressibility βs, apparent molal volume Iv, apparent adiabatic compressibility Ik, intermolecular free length Lf, relative association RA and acoustic impendence Z. The obtained results from the acoustic parameters show the significant interaction between the complex and solvent. © 2016 Author(s).


Patil S.D.,Devchand College | Takale M.V.,Shivaji University
AIP Conference Proceedings | Year: 2016

This paper presents an influence of light absorption on self-focusing of laser beam propagation in plasma. The differential equation for beam-width parameter is obtained using the Wentzel-Kramers-Brillouin and paraxial approximations through parabolic equation approach. The nonlinearity in dielectric function is assumed to be aroused due to the combined effect of weakly relativistic and ponderomotive regime. To highlight the nature of propagation, behavior of beam-width parameter with dimensionless distance of propagation is presented graphically and discussed. The present work is helpful to understand issues related to the beam propagation in laser plasma interaction experiments where light absorption plays a vital role. © 2016 Author(s).


Patil S.D.,Devchand College | Takale M.V.,Shivaji University | Fulari V.J.,Shivaji University | Gill T.S.,Guru Nanak Dev University
Laser and Particle Beams | Year: 2016

In the present paper, we have examined the sensitiveness of light absorption for self-focusing of Gaussian laser beam in plasma. By introducing dielectric function of plasma under ponderomotive and weakly relativistic regime, we have established the differential equation for beam-width parameter by using parabolic equation approach under Wentzel-Kramers-Brillouin and paraxial approximations and solved it numerically. In order to incorporate the sensitiveness of light absorption for self-focusing, behavior of normalized beam-width parameter; plasma density distribution with dimensionless distance of propagation is presented graphically and discussed. Numerical analysis shows that light absorption plays a vital role in self-focusing of laser beam in plasma under weakly relativistic and ponderomotive regime and gives reasonably interesting results. Copyright © Cambridge University Press 2016


Patil S.D.,Devchand College | Takale M.V.,Doodhsakhar Mahavidyalaya
Physics of Plasmas | Year: 2013

In the present paper, we have employed the quantum dielectric response in thermal quantum plasma to model relativistic self-focusing of Gaussian laser beam in a plasma. We have presented an extensive parametric investigation of the dependence of beam-width parameter on distance of propagation in relativistic thermal quantum plasma. We have studied the role of Fermi temperature in the phenomenon of self-focusing. It is found that the quantum effects cause much higher oscillations of beam-width parameter and better relativistic focusing of laser beam in thermal quantum plasma in comparison with that in the relativistic cold quantum plasma and classical relativistic plasma. Our computations show more reliable results in comparison to the previous works. © 2013 AIP Publishing LLC.


Patil S.D.,Devchand College | Takale M.V.,Doodhsakhar Mahavidyalaya
Laser Physics Letters | Year: 2013

The effect of weakly relativistic ponderomotive force in the interaction of cosh-Gaussian laser beams with a plasma is studied. This force modifies the electron density distribution in the plasma. A nonlinear differential equation governing the evolution of the beam width parameter f in the WKB and paraxial approximations is set up using a parabolic equation approach and solved numerically. Self-focusing of a cosh-Gaussian beam is studied at various values of the decentered parameter b. Numerical analysis shows that the b parameter plays a vital role in the propagation characteristics in the plasma. © 2013 Astro Ltd.


Patil S.D.,Devchand College | Takale M.V.,Doodhsakhar Mahavidyalaya Bidri | Fulari V.J.,Shivaji University | Gupta D.N.,University of Delhi | Suk H.,Gwangju Institute of Science and Technology
Applied Physics B: Lasers and Optics | Year: 2013

Propagation of a Gaussian laser beam in a plasma is analyzed by including the nonlinearity associated with the relativistic mass and the ponderomotive force. We set up the nonlinear differential equation for beam width parameter using parabolic equation approach and solve it numerically. Our results show that the ponderomotive self-focusing contributes in the relativistic self-focusing of the laser beam. An impact of plasma electron temperature, relative density parameter, and intensity parameter on the propagation of the laser beam has been explored. © 2012 Springer-Verlag Berlin Heidelberg.


Navare S.T.,Shivaji University | Takale M.V.,Doodhsakhar Mahavidyalaya | Patil S.D.,Devchand College | Fulari V.J.,Shivaji University | Dongare M.B.,Shivaji University
Optics and Lasers in Engineering | Year: 2012

The authors have investigated impact of linear absorption on self-focusing of Gaussian laser beam in collisional plasma. The nonlinearity in dielectric constant considered herein is mainly due to the elastic electron-ion collisions. A second order differential equation of dimensionless beam width parameter has been derived and solved numerically. It is observed that absorption plays a vital role in self-focusing of laser beams and weakens the stationary oscillatory character of beam-width parameter with distance of propagation. We have also considered the effect of intensity, relative density and parameter characterizing nature of collisions on propagation characteristics. © 2012 Elsevier Ltd. All rights reserved.


Patil S.D.,Devchand College | Takale M.V.,Shivaji University | Gill T.S.,Guru Nanak Dev University
European Physical Journal D | Year: 2015

In the present paper, we have studied the effect of light absorption on relativistic self-focusing of Gaussian laser beam propagating through plasma. We have obtained the differential equation for beam width parameter by using parabolic equation approach under the usual WKB and paraxial approximations. The effect of light absorption on the behavior of beam-width parameter, normalized intensity and plasma dielectric function is presented graphically and discussed. It shows that absorption play an important role in weakening the relativistic self-focusing of laser beam during propagation in plasma and gives reasonably interesting results. Graphical abstract: [Figure not available: see fulltext.] © 2015 EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg.


Patil S.D.,Devchand College | Takale M.V.,Doodhsakhar Mahavidyalaya
Physics of Plasmas | Year: 2014

Habibi and Ghamari have presented a Comment on our paper [Phys. Plasmas 20, 072703 (2013)] by examining quantum dielectric response in thermal quantum plasma. They have modeled the relativistic self-focusing of Gaussian laser beam in cold and warm quantum plasmas and reported that self-focusing length does not change in both situations. In this response, we have reached the following important conclusions about the comment itself. © 2014 AIP Publishing LLC.


Shiragave P.D.,Devchand College | Chavan N.S.,Shivaji University
Plant Archives | Year: 2012

The effect of cytokinins, au×ins and coconut milk on multishoots formation from a×illary buds of Momordica dioica was studied. Among the various combinations of growth regulators studied, BAP (1.0 - 2.5mg/l ), NAA (2 mg/l) and coconut milk (10%) in Murashige and Skoogs (1962) medium induced multiple shoots. Ma×imum number of shoots (28.00) were regenerated on MS medium enriched with BAP(2 mg/l) + NAA(2 mg/l) + Coconut Milk (10%). In vitro regenerated shoots develop roots in the MS medium supplemented with IBA (2 mg/l). The regenerated plantlets hardened and successfully transferred to the field.

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