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Kolkata, India

Presidency University, Kolkata, formerly Hindu College and Presidency College, is a public state university located in Kolkata, West Bengal.The college was established in 1817 by Raja Ram Mohan Roy, Raja Radhakanta Deb, Maharaja Tejchandra Ray of Burdwan, David Hare, Justice Sir Edward Hyde East, Prasanna Coomar Tagore and Babu Buddinath Mukherjee.Established as the Mahapathshala wing of Hindu College, it was renamed Presidency College, i.e., the college of the Bengal Presidency, in 1855. In 2010, under the Chief Ministership of Buddhadeb Bhattacharya, a former student of the college, it was upgraded to the status of a full university by the Presidency University Act, 2010 passed in the West Bengal Legislative Assembly. The longest serving Principal of Presidency College was J. Sutcliff, who was its principal intermittently for 20 years, from 1852-1875. Wikipedia.


Mukherjee P.K.,Presidency University of India
Chemical Physics Letters | Year: 2013

Experimental studies have shown that the chain flexibility plays an important role in the properties of the liquid crystal phase transitions. We examine the effect of the chain flexibility on the nematic to smectic-A phase transition within the Landau phenomenological theory. We show how the flexibility of the chains influences the critical behavior of the nematic to smectic-A phase transition. The possibility of the tricritical point at the nematic to smectic-A phase transition is discussed in a phenomenological way. The theoretical predictions are found to be in good qualitative agreement with available experimental results. © 2012 Elsevier B.V. All rights reserved. Source


Mukherjee P.K.,Presidency University of India
Journal of Physical Chemistry B | Year: 2012

Experimental studies have shown that the gauche molecular conformations and the chain configurations play an important role in determining the structures and the phase transitions of the different rotator phases of n-alkanes. We extend our previous phenomenological theory to describe the effect of gauche defects and molecular flexibility on the various rotator phase transitions of n-alkanes. The roles of gauche defects and molecular flexibility are discussed by means of phenomenological theory. The effect of gauche defects and molecular flexibility is to modify the Landau coefficients and to shift the transition lines in the phase diagram. The theoretical predictions are found to be in good qualitative agreement with available experimental results. © 2012 American Chemical Society. Source


Gupta B.,Presidency University of India | Huang B.,Rutgers University
International Journal of Genomics | Year: 2014

Salinity is a major abiotic stress limiting growth and productivity of plants in many areas of the world due to increasing use of poor quality of water for irrigation and soil salinization. Plant adaptation or tolerance to salinity stress involves complex physiological traits, metabolic pathways, and molecular or gene networks. A comprehensive understanding on how plants respond to salinity stress at different levels and an integrated approach of combining molecular tools with physiological and biochemical techniques are imperative for the development of salt-tolerant varieties of plants in salt-affected areas. Recent research has identified various adaptive responses to salinity stress at molecular, cellular, metabolic, and physiological levels, although mechanisms underlying salinity tolerance are far from being completely understood. This paper provides a comprehensive review of major research advances on biochemical, physiological, and molecular mechanisms regulating plant adaptation and tolerance to salinity stress. © 2014 Bhaskar Gupta and Bingru Huang. Source


Acharyya M.,Presidency University of India
Journal of Magnetism and Magnetic Materials | Year: 2014

The dynamical responses of a ferromagnetic film to a propagating spherical electromagnetic wave passing through it are studied by Monte Carlo simulation of two dimensional Ising ferromagnet. For a fixed set of values of the frequency and wavelength of the spherical EM wave, and depending on the values of amplitude of the EM wave and temperature of the system, three different modes are identified. The static pinned mode, the localised dynamical breathing mode and extended dynamical spreading mode are observed. The nonequilibrium dynamical-symmetry-breaking breathing and spreading phase transitions are also observed and the transition temperatures are obtained as functions of the amplitude of the magnetic field of EM wave. A comprehensive phase diagram is drawn. The boundaries of breathing and spreading transitions merge eventually at the equilibrium transition temperature for two dimensional Ising ferromagnet as the value of the amplitude of the magnetic field becomes vanishingly small. © 2013 Elsevier B.V. All rights reserved. Source


Acharyya M.,Presidency University of India
Journal of Magnetism and Magnetic Materials | Year: 2013

The dynamical steady state behaviour of the random field Ising ferromagnet swept by a propagating magnetic field wave is studied at zero temperature by Monte Carlo simulation in two dimensions. The distribution of the random field is bimodal type. For a fixed set of values of the frequency, wavelength and amplitude of propagating magnetic field wave and the strength of the random field, four distinct dynamical steady states or nonequilibrium phases were identified. These four nonequilibrium phases are characterised by different values of structure factors. State or phase of first kind, where all spins are parallel (up). This phase is a frozen or pinned where the propagating field has no effect. The second one is the propagating type, where the sharp strips formed by parallel spins are found to move coherently. The third one is also propagating type, where the boundary of the strips of spins is not very sharp. The fourth kind shows no propagation of strips of magnetic spins, forming a homogeneous distribution of up and down spins. This is disordered phase. The existence of these four dynamical phases or modes depends on the value of the amplitude of propagating magnetic field wave and the strength of random (static) field. A phase diagram has also been drawn, in the plane formed by the amplitude of propagating field and the strength of random field. It is also checked that the existence of these dynamical phases is neither a finite size effect nor a transient phenomenon. © 2013 Elsevier B.V. Source

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