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- Arti Dua, Thomas A. Vilgis
- 2005

â€“ A self-consistent variational theory for globules based on the uniform expansion method is presented. This method, first introduced by Edwards and Singh to estimate the size of a self-avoinding chain, is restricted to a good solvent regime, where two-body repulsion leads to chain swelling. We extend the variational method to a poor solvent regime whereâ€¦ (More)

Lindemann, almost a century ago, proposed a schematic mechanism for unimolecular gas-phase reactions. Here, we present a new semiempirical method to calculate the effective rate constant in unimolecular gas-phase kinetics through a stochastic reformulation of Lindemann kinetics. Considering the rate constants for excitation and de-excitation steps in theâ€¦ (More)

- Soma Saha, Somdeb Ghose, R. Adhikari, Arti Dua
- Physical review letters
- 2011

Recent fluorescence spectroscopy measurements of single-enzyme kinetics have shown that enzymatic turnovers form a renewal stochastic process in which the inverse of the mean waiting time between turnovers follows the Michaelis-Menten equation. We study enzyme kinetics at physiologically relevant mesoscopic concentrations using a master equation. From theâ€¦ (More)

- Arti Dua, Thomas A. Vilgis
- Physical review. E, Statistical, nonlinear, andâ€¦
- 2005

The dynamics of an ideal polymer ring enclosing a constant algebraic area is studied. The constraint of a constant area is found to couple the dynamics of the two Cartesian components of the position vector of the polymer ring through the Lagrange multiplier function which is time dependent. The time dependence of the Lagrange multiplier is evaluated in aâ€¦ (More)

- Ashutosh Kumar, R. Adhikari, Arti Dua
- Physical review letters
- 2017

- Arti Dua, Thomas A. Vilgis
- The Journal of chemical physics
- 2004

We present using simple scaling arguments and one step replica symmetry breaking a theory for the localization of semiflexible polymers in a quenched random environment. In contrast to completely flexible polymers, localization of semiflexible polymers depends not only on the details of the disorder but also on the ease with which polymers can bend. Theâ€¦ (More)

- Soma Saha, Antara Sinha, Arti Dua
- The Journal of chemical physics
- 2012

Recent studies in single-molecule enzyme kinetics reveal that the turnover statistics of a single enzyme is governed by the waiting time distribution that decays as mono-exponential at low substrate concentration and multi-exponential at high substrate concentration. The multi-exponentiality arises due to protein conformational fluctuations, which act onâ€¦ (More)

- Ashutosh Kumar, Sambarta Chatterjee, M. Nandi, Arti Dua
- The Journal of chemical physics
- 2016

Dynamic co-operativity in monomeric enzymes is characterized in terms of a non-Michaelis-Menten kinetic behaviour. The latter is believed to be associated with mechanisms that include multiple reaction pathways due to enzymatic conformational fluctuations. Recent advances in single-molecule fluorescence spectroscopy have provided new fundamental insights onâ€¦ (More)

- Ashutosh Kumar, Hiranmay Maity, Arti Dua
- The journal of physical chemistry. B
- 2015

Recent fluorescence spectroscopy measurements of the turnover time distribution of single-enzyme turnover kinetics of Î²-galactosidase provide evidence of Michaelis-Menten kinetics at low substrate concentration. However, at high substrate concentrations, the dimensionless variance of the turnover time distribution shows systematic deviations from theâ€¦ (More)

- Prasanta Kundu, Arti Dua
- The Journal of chemical physics
- 2013

A recent experiment has probed the electron transfer kinetics in the early stage of photosynthesis in Rhodobacter sphaeroides for the reaction center of wild type and different mutants [Science 316, 747 (2007)]. By monitoring the changes in the transient absorption of the donor-acceptor pair at 280 and 930 nm, both of which show non-exponential temporalâ€¦ (More)