Casimir force on interacting Bose-Einstein condensate (2009)
Biswas, Shyamal, Bhattacharjee, J. K., Majumder, Dwipesh, Saha, Kush, Chakravarty, Nabajit
We have presented an analytic theory for the Casimir force on a Bose-Einstein condensate(BEC), which is confined between two parallel plates. We have considered short range interactions between the...
Approximation Techniques for Non Linear Oscillators (2009)
Bhattacharjee, J. K., Dutta, Debabrata, Sarkar, Amartya
We show that the Lindstedt-Poincare perturbation theory is always a reliable technique in the region of small coupling constant. The harmonic balance result, on the other hand, if expanded in the...
Turing Patterns in two dimensional reaction-diffusion system: effect of an electric field (2008)
Agarwalla, B K, Bhattacharjee, J K, Titum, P
We consider a two dimensional Turing like system with two diffusing species which interact with each other. Considering the species to be charged, we include the effect of an electric field along a...
Eigenvalue Problem in Two Dimensions for An Irregular Boundary (2008)
Chakraborty, S., Bhattacharjee, J. K., Khastgir, S. P.
An analytical perturbative method is suggested for determining the eigenvalues of the Helmholtz equation in two dimensions where the wavefunction vanishes on an irregular closed curve. We can thus...
Resonance and limit cycle in a noise driven Lorenz model (2008)
Samanta, Himadri S., Bhattacharjee, J. K.
The effect of an external noise on the Lorenz model is investigated near the onset of convection and near the Hopf bifurcation. We show the existence of a diverging time scale near the onset of...
Theory of the critical Casimir force for He-4 film (2008)
Biswas, Shyamal, Bhattacharjee, J. K., Samanta, Himadri S., Bhattacharyya, Saugata, Hu, Bambi
We present an analytic theory of critical Casimir force for He-4 film below and above the lambda point. We take complex critical fluctuations and calculate the critical Casimir force by a...
THE EUROPEAN PHYSICAL JOURNAL B c○ EDP Sciences (2007)
A. Basu, J. K. Bhattacharjee, S. Ramaswamy, P. H. Diamond, Phys Rev E
Mean magnetic field and noise cross-correlation in magnetohydrodynamic turbulence: results from a one-dimensional model
Global Persistence Exponent in Critical Dynamics: Finite Size induced Crossover (2007)
Chakraborty, D., Bhattacharjee, J. K.
We extend the definition of a global order parameter to the case of a critical system confined between two infinite parallel plates separated by a finite distance $L$. For a quench to the critical...
On the third order structure function for rotating 3D homogeneous turbulent flow (2007)
Chakraborty, Sagar, Bhattacharjee, J. K.
A form for the two-point third order structure function has been calculated for three dimensional homogeneous incompressible slowly rotating turbulent fluid. It has been argued that it may possibly...
Asymmetry of the work probability distribution (2006)
Saha, Arnab, Bhattacharjee, J. K.
We show, both analytically and numerically, that for a nonlinear system making a transition from one equilibrium state to another under the action of an external time dependent force, the work...
Effects of non-denumerable fixed points in finite dynamical systems (2006)
Chakraborty, Sagar, Bhattacharjee, J. K.
The motion of a spinning football brings forth the possible existence of a whole class of finite dynamical systems where there may be non-denumerably infinite number of fixed points. They defy the...
Lotka-Volterra dynamics under periodic influence (2006)
Dutta, Debabrata, Bhattacharjee, J K
Lotka Volterra model and its modified forms have long become a major area of interest for periodic motions in nonlinear systems with competitive species. The model given by Volterra shows that its...
Finite Size Effect in Persistence (2006)
Chakraborty, D., Bhattacharjee, J. K.
We have investigated the random walk problem in a finite system and studied the crossover induced in the the persistence probability scales by the system size.Analytical and numerical work show that...
Ray, Arnab K., Bhattacharjee, J. K.
Modelling the flow in a thin accretion disc like a dynamical system, we analyse the nature of the critical points of the steady solutions of the flow. For the simple inviscid disc there are two...
Fokker-Planck Equation : Long-Time Dynamics in Approach to Equilibrium (2005)
Samanta, Himadri S., Bhattacharjee, J. K.
We discuss the approach to equilibrium of systems governed by the Fokker-Planck equation. In particular, we focus on problems involving barrier penetration and the associated Kramers' time. We also...
Growth Models and Models of Turbulence : A Stochastic Quantization Perspective (2005)
Samanta, Himadri S., Bhattacharjee, J. K., Gangopadhyay, D.
We consider a class of growth models and models of turbulence based on the randomly stirred fluid. The similarity between the predictions of these models, noted a decade earlier, is understood on the...
Non equilibrium statistical physics with fictitious time (2005)
Samanta, Himadri S., Bhattacharjee, J. K.
Problems in non equilibrium statistical physics are characterized by the absence of a fluctuation dissipation theorem. The usual analytic route for treating these vast class of problems is to use...
Approach to equilibrium in adiabatically evolving potentials (2004)
Samanta, H. S., Bhattacharjee, J. K., Ramaswamy, R.
For a potential function (in one dimension) which evolves from a specified initial form $V_{i}(x)$ to a different $V_{f}(x)$ asymptotically, we study the evolution, in an overdamped dynamics, of an...
Standing and travelling waves in the shallow-water circular hydraulic jump (2004)
Ray, Arnab K., Bhattacharjee, J. K.
A wave equation for a time-dependent perturbation about the steady shallow-water solution emulates the metric an acoustic white hole, even upon the incorporation of nonlinearity in the lowest order....
Large scale properties in turbulent spherically symmetric accretion (2003)
Ray, Arnab K., Bhattacharjee, J. K.
The role of turbulence in a spherically symmetric accreting system has been studied on very large spatial scales of the system. This is also a highly subsonic flow region and here the accreting fluid...
A Dynamical Systems Approach to an Inviscid and Thin Accretion Disc (2003)
Ray, Arnab K., Bhattacharjee, J. K.
The inviscid and thin accretion disc is a simple and well understood model system in accretion studies. In this work, modelling such a disc like a dynamical system, we analyse the nature of the fixed...
Realizability of stationary spherically symmetric transonic accretion (2002)
Ray, Arnab K., Bhattacharjee, J. K.
The spherically symmetric stationary transonic (Bondi) flow is considered a classic example of an accretion flow. This flow, however, is along a separatrix, which is usually not physically...
Wavelength Doulbing Bifurcations In A Reaction Diffusion System (2002)
Kar, Deepak, Bhattacharjee, J K
In a two species reaction diffusion system,we show that it is possible to generate a set of wavelength doubling bifuractions leading to spatially chaotic state.The wavelength doubling bifurcations...
Photoemission From A Two Electron Quantum Dot (2002)
Goswami, Pallab, Das, Subinoy, Bhattacharjee, J. K.
We consider photoemission from a two-electron quantum dot and find analytic expression for the cross-section. We show that the emission cross-section from the ground state as a function of magnetic...
Two Electron Quantum Dot - A Variational Treatment For The Ground State (2002)
Das, Subinoy, Goswami, Pallab, Bhattacharjee, J. K.
A variational treatment for a two-electron quantum dot (the artificial helium atom) is proposed which leads to exact answer for the ground state energy. Depending on the magnetic field value the...
Chaos in the Quantum Double Well Oscillator: The Ehrenfest View Revisited (2001)
Bhattacharjee, J. K., Roy, Analabha
We treat the double well quantum oscillator from the standpoint of the Ehrenfest equation but in a manner different from Pattanayak and Schieve. We show that for short times there can be chaotic...
Critical Ultrasonics Near the Superfluid Transition : Finite Size Effects (1998)
Bhattacharyya, Saugata, Bhattacharjee, J. K.
The suppression of order parameter fluctuations at the boundaries causes the ultrasonic attenuation near the superfluid transition to be lowered below the bulk value. We calculate explicitly the...
Scaling Function for the Critical Specific Heat in a Confined Geometry : Spherical Limit (1998)
Bhattacharyya, Saugata, Bhattacharjee, J. K.
The scaling function for the critical specific heat is obtained exactly for temperatures above the bulk transition temperature by working in the spherical limit. Generalization of the function to...
Biswas, Parthapratim, Majumdar, Arnab, Mehta, Anita, Bhattacharjee, J. K.
We present and analyse in this paper three models of coupled continuum equations all united by a common theme: the intuitive notion that sandpile surfaces are left smoother by the propagation of...
ESS and Dissipation Range Dynamics of 3-D Turbulence (1997)
Sain, Anirban, Bhattacharjee, J. K.
We carry out a self consistent calculation of the structure functions in the dissipation range using Navier Stokes equation. Combining these results with the known structures in the inertial range,...
Distribution Function of the End-to-End Distance of Semiflexible Polymers (1997)
Bhattacharjee, J. K., Thirumalai, D., Bryngelson, J. D.
The distribution function of the end-to-end distance of a semiflexible polymer, G(R;L) (where R denotes the end-to-end distance and L the contour length), is calculated using a meanfield-like...
Thermodynamic stability of folded proteins against mutations (1997)
Bussemaker, H. J., Thirumalai, D., Bhattacharjee, J. K.
By balancing the average energy gap with its typical change due to mutations for protein-like heteropolymers with M residues, we show that native states are unstable to mutations on a scale M* ~...
Some properties of a class of coupled Langevin equations (1997)
Biswas, Parthapratim, Majumdar, Arnab, Mehta, Anita, Bhattacharjee, J. K.
We present a set of coupled continuum equationswith a specific coupling between mobile grains $\rho$ and clusters $h$ on the surface of a sandpile. The equations are analysed self-consistently; we...
In search of smooth sandpiles: the Edwards-Wilkinson equation with flow (1997)
Biswas, Parthapratim, Majumdar, Arnab, Mehta, Anita, Bhattacharjee, J. K.
The well-known Edwards-Wilkinson equation with a flow term added exhibits a smoothing fixed point in addition to the normal EW fixed point. Based on this, we present a model of sandpiles involving a...
Dynamic Response of Ising System to a Pulsed Field (1996)
Acharyya, M., Bhattacharjee, J. K., Chakrabarti, B. K.
The dynamical response to a pulsed magnetic field has been studied here both using Monte Carlo simulation and by solving numerically the meanfield dynamical equation of motion for the Ising model....
Guo, Shujuan, Evans, Sarah A., Wilkes, Mindy B., Bhattacharjee, J. K.
The α-aminoadipate pathway for lysine biosynthesis is present only in fungi. The α-aminoadipate reductase (AAR) of this pathway catalyzes the conversion of α-aminoadipic acid to...
Garrad, R C, Bhattacharjee, J K
The alpha-aminoadipate pathway for the biosynthesis of lysine is present only in fungi and euglena. Until now, this unique metabolic pathway has never been investigated in the opportunistic fungal...
The alpha-aminoadipate (AA) pathway for the biosynthesis of lysine was investigated in the wild type and in lysine auxotrophs of the fission yeast Schizosaccharomyces pombe. Of the eight enzyme...
Storts, D R, Bhattacharjee, J K
Saccharopine dehydrogenase (glutamate forming) of the biosynthetic pathway of lysine in Saccharomyces cerevisiae was purified 1,122-fold by using acid precipitation, ammonium sulfate precipitation,...
Borell, C W, Urrestarazu, L A, Bhattacharjee, J K
Three lysine auxotrophs, strains AU363, 7305d, and 8201-7A, were investigated genetically and biochemically to determine their gene loci, biochemical lesions, and roles in the lysine biosynthesis of...
The mode of synthesis and the regulation of fructose-1,6-bisphosphatase (Fbpase), a gluconeogenic enzyme, and phosphofructokinase (PFK), a glycolytic enzyme, were investigated in Saccharomyces...
Lysine biosynthesis in Rhodotorula glutinis: properties of pipecolic acid oxidase.
Kinzel, J J, Bhattacharjee, J K
Pipecolic acid oxidase from Rhodotorula glutinis, which converts pipecolic acid to alpha-aminoadipic-delta-semialdehyde, an intermediate of the biosynthetic pathway of lysine, was purified 290-fold....
Winston, M K, Bhattacharjee, J K
The growth of Saccharomyces cerevisiae wild-type strain X2180 in minimal medium was inhibited by the addition of higher-than-supplementary levels of alpha-aminoadipate. This inhibitory effect was...
The activity of fructose-1,6-bisphosphatase (FBP), a gluconeogenic enzyme, was determined in wild-type Saccharomyces cerevisiae X2180 grown in the presence of the glycolytic carbon sources, glucose,...
Molecular and functional analysis of the LYS1 gene of Candida albicans.
Garrad, R, Schmidt, T M, Bhattacharjee, J K
The LYS1 gene of Candida albicans has been localized to a 1.8-kb DNA fragment present on the plasmid YpBRG2. YpBRG2 has been shown to complement the saccharopine dehydrogenase mutant Stx4-4A of...
Petro, Thomas M., Bhattacharjee, J. K.
We investigated the effects of dietary essential amino acid limitations on the susceptibility of mice to Salmonella typhimurium infections and on humoral and cellular immune (cell-mediated immune)...
Crocker, Wilson H., Bhattacharjee, J. K.
Aconitaseless glutamic acid auxotroph MO-1-9B of Saccharomyces grew in glutamic acid-supplemented minimal medium, but failed to grow when glutamic acid was substituted by proline, arginine,...
Petro, Thomas M., Bhattacharjee, J. K.
Effects of dietary essential amino acid (leucine, isoleucine, valine, or lysine) limitations upon the native levels of serum immunoglobulin G (IgG), IgM, and IgA, as well as transferrin, the third...
Lysine biosynthesis in Saccharomyces. Conversion of α-aminoadipate into α-aminoadipic δ-semialdehyde
Sinha, Asru K., Bhattacharjee, J. K.
The reduction of α-aminoadipate to α-aminoadipic δ-semialdehyde by a cell-free extract of Saccharomyces is shown to be a three-step process. First the amino acid reacts with ATP to form an...
Kinzel, J J, Winston, M K, Bhattacharjee, J K
Wild-type and saccharopine dehydrogenaseless mutant strains of Rhodotorula glutinis grew in minimal medium containing lysine as the sole nitrogen source and simultaneously accumulated, in the culture...
Role of Pipecolic Acid in the Biosynthesis of Lysine in Rhodotorula glutinis
Kinzel, Jerome J., Bhattacharjee, J. K.
The role of pipecolic acid in the biosynthesis of lysine was investigated in Rhodotorula glutinis, an aerobic red yeast. Supplementation of pipecolic acid in the minimal medium supported the growth...
Guo, Shujuan, Evans, Sarah A., Wilkes, Mindy B., Bhattacharjee, J. K.
The α-aminoadipate pathway for lysine biosynthesis is present only in fungi. The α-aminoadipate reductase (AAR) of this pathway catalyzes the conversion of α-aminoadipic acid to...
Garrad, R C, Bhattacharjee, J K
The alpha-aminoadipate pathway for the biosynthesis of lysine is present only in fungi and euglena. Until now, this unique metabolic pathway has never been investigated in the opportunistic fungal...
The alpha-aminoadipate (AA) pathway for the biosynthesis of lysine was investigated in the wild type and in lysine auxotrophs of the fission yeast Schizosaccharomyces pombe. Of the eight enzyme...
Storts, D R, Bhattacharjee, J K
Saccharopine dehydrogenase (glutamate forming) of the biosynthetic pathway of lysine in Saccharomyces cerevisiae was purified 1,122-fold by using acid precipitation, ammonium sulfate precipitation,...
Borell, C W, Urrestarazu, L A, Bhattacharjee, J K
Three lysine auxotrophs, strains AU363, 7305d, and 8201-7A, were investigated genetically and biochemically to determine their gene loci, biochemical lesions, and roles in the lysine biosynthesis of...
Kinzel, J J, Winston, M K, Bhattacharjee, J K
Wild-type and saccharopine dehydrogenaseless mutant strains of Rhodotorula glutinis grew in minimal medium containing lysine as the sole nitrogen source and simultaneously accumulated, in the culture...
Role of Pipecolic Acid in the Biosynthesis of Lysine in Rhodotorula glutinis
Kinzel, Jerome J., Bhattacharjee, J. K.
The role of pipecolic acid in the biosynthesis of lysine was investigated in Rhodotorula glutinis, an aerobic red yeast. Supplementation of pipecolic acid in the minimal medium supported the growth...
The mode of synthesis and the regulation of fructose-1,6-bisphosphatase (Fbpase), a gluconeogenic enzyme, and phosphofructokinase (PFK), a glycolytic enzyme, were investigated in Saccharomyces...
Lysine biosynthesis in Rhodotorula glutinis: properties of pipecolic acid oxidase.
Kinzel, J J, Bhattacharjee, J K
Pipecolic acid oxidase from Rhodotorula glutinis, which converts pipecolic acid to alpha-aminoadipic-delta-semialdehyde, an intermediate of the biosynthetic pathway of lysine, was purified 290-fold....
Winston, M K, Bhattacharjee, J K
The growth of Saccharomyces cerevisiae wild-type strain X2180 in minimal medium was inhibited by the addition of higher-than-supplementary levels of alpha-aminoadipate. This inhibitory effect was...
The activity of fructose-1,6-bisphosphatase (FBP), a gluconeogenic enzyme, was determined in wild-type Saccharomyces cerevisiae X2180 grown in the presence of the glycolytic carbon sources, glucose,...
Molecular and functional analysis of the LYS1 gene of Candida albicans.
Garrad, R, Schmidt, T M, Bhattacharjee, J K
The LYS1 gene of Candida albicans has been localized to a 1.8-kb DNA fragment present on the plasmid YpBRG2. YpBRG2 has been shown to complement the saccharopine dehydrogenase mutant Stx4-4A of...
Petro, Thomas M., Bhattacharjee, J. K.
We investigated the effects of dietary essential amino acid limitations on the susceptibility of mice to Salmonella typhimurium infections and on humoral and cellular immune (cell-mediated immune)...
Crocker, Wilson H., Bhattacharjee, J. K.
Aconitaseless glutamic acid auxotroph MO-1-9B of Saccharomyces grew in glutamic acid-supplemented minimal medium, but failed to grow when glutamic acid was substituted by proline, arginine,...
Petro, Thomas M., Bhattacharjee, J. K.
Effects of dietary essential amino acid (leucine, isoleucine, valine, or lysine) limitations upon the native levels of serum immunoglobulin G (IgG), IgM, and IgA, as well as transferrin, the third...
Lysine biosynthesis in Saccharomyces. Conversion of α-aminoadipate into α-aminoadipic δ-semialdehyde
Sinha, Asru K., Bhattacharjee, J. K.
The reduction of α-aminoadipate to α-aminoadipic δ-semialdehyde by a cell-free extract of Saccharomyces is shown to be a three-step process. First the amino acid reacts with ATP to form an...