A thermodynamic model of quaternary polymeric solution was developed for membrane formation. It incorporates two mixed solventsN-methyl-2-pyrrolidone (NMP) and tetrahydrofuran (THF), and two high molecular weight polymers cellulose acetate (CA) and polyvinyl chloride (PVC). Also, another polymeric solution was modeled by replacing (CA) with polyvinylpyrrolidone (PVP). The developed model depend...

In liquid systems where it is possible to perform light scattering experiments at the melting points of polymer solutions without nucleation taking place because of undercooling, the thermodynamic parameters necessary to calculate the correction parameter g in the Flory-Huggins equation as modified by Koningsveld can be determined. In the system poly(2,6-dimethyl 1,4-phenylene oxide)-toluene cr...

In the present work, vinyl benzyl chloride (VBC) was polymerized by using free radical polymerization. The obtained PVBC reacted with dibutyl amine to obtain tertiary modified polystyrene based polymer (PVBC-Dibutyl amine). inverse gas chromatography (IGC) method used examine thermodynamic properties of polymer. Firstly, retention diagrams some polar and non-polar solvents on PVBC-Dibutyl were ...

The Marcus-Lushnikov process is a finite stochastic particle system in which each particle is entirely characterized by its mass. Each pair of particles with masses x and y merges into a single particle at a given rate K(x, y). We consider a strongly gelling kernel behaving as K(x, y) = xαy+ xyα for some α ∈ (0, 1]. In such a case, it is well-known that gelation occurs, that is, giant particles...

The equilibrium structure and dynamics of a single polymer chain in a thermal solvent is by now well-understood in terms of scaling laws. Here, we consider a polymer in a bacterial bath, i.e., in a solvent consisting of active particles which bring in nonequilibrium fluctuations. Using computer simulations of a self-avoiding polymer chain in two dimensions which is exposed to a dilute bath of a...

Permanently crosslinked polyelectrolyte gels are known to undergo discontinuous first-order volume phase transitions, the onset of which may be caused by a number of factors. In this study we examine the volumetric properties of such polyelectrolyte gels in relation to the progressive substitution of monovalent counterions by divalent counterions as the gels are equilibrated in solvents of diff...

Applications of bacterial endophytes and their advanced identification methodologiesR. Renugadevi, M. P. Ayyappadas, V. Subha Priya, Flory Shobana, K. Vivekanandhan

Applications of bacterial endophytes and their advanced identification methodologiesR. Renugadevi, M. P. Ayyappadas, V. Subha Priya, Flory Shobana, K. Vivekanandhan