Thermal and biological studies of Schiff bases of chitosan derived from heteroaryl aldehydes

Journal of Thermal Analysis and Calorimetry - The synthesis of Schiff bases of chitosan is performed by the reaction of chitosan with different heteroaryl aldehydes, i.e., furfuraldehyde,...     

Heteropoly Acids as Heterogeneous and Reusable Catalyst for α-Thiocyanation of Ketones

Simple, efficient, and mild method for α-thiocyanation of ketones in presence of heteropolyacid has been developed. This methodology offered α-oxothiocyanates in good to excellent yields at room temperature in a highly selective manner. The catalyst could be efficiently recovered from the reaction and reused.     

Josiah Willard Gibbs and the Foundations of Statistical Mechanics

In this study, I discuss the development of the ideas of Josiah Willard Gibbs' Elementary Principles in Statistical Mechanics and the fundamental role they played in forming the modern concepts in that field. Gibbs' book on statistical mechanics became an instant classic and has remained so for almost a century.     

On the matched-asymptotic solution of elastodynamic problems: Loading over a semi-infinite rectangular boundary

The paper discusses the solution to an elastodynamic problem of an infinite medium excited by loads acting over a semi-infinite rectangular boundary whose height 2a is assumed small compared to the wavelengths of interest. The solution is developed using the method of matched-asymptotics in conjunction with an application of the Wiener-Hopf technique for the outer problems and the Muskhelishvili-Kolosov complex functions for the inner problems. The solutions are matched mutually and the resulting stress behaviour, as far as it is described by the inner limit to the outer solution, is also derived.     

Testable signatures of quantum nonlocality in a two-dimensional chiral p-wave superconductor

A class of topological excitations-the odd-winding number vortices-in a spinless 2D chiral p-wave (px+ipy) superconductor traps Majorana fermion states in the vortex cores. For a dilute gas of such vortices, the lowest energy fermionic eigenstates are intrinsically nonlocal. We predict two testable signatures of this unusual quantum nonlocality in quasiparticle tunneling experiments. We discuss why the associated teleportationlike phenomenon does not imply the violation of causality.