A simple molecular model of chiral molecules is presented in this paper : the chiral dipolar hard sphere model. The discriminatory interaction between enantiomers is represented by electrostatic (or magnetic) dipoles-dipoles interactions : short ranged steric repulsion are represented by hard sphere potential and, in each molecule, two point dipoles are located inside the sphere. The model is d...

In this paper, we study anisotropic exact solutions in the homogeneous Bianchi I background geometry a multifield theory. Specifically, consider Chiral–Quintom theory, which is an extension of Chiral because at least one scalar fields can have negative energy density. Moreover, Quintom theory be recovered when free parameters vanishes. We find that Kasner-like and exponential exist for specific...

The present study was undertaken to evaluate the possibility of chiral discrimination in the release of enantiomers of ketoprofen (KT) in tablet form and, in turn, the bioavailability of the individual enantiomers, using the rabbit as a model. The enantiomeric concentration of KT in plasma was determined using a customized chiral HPLC analysis. First the plasma concentration-time profile was es...

In the physical vacuum of QCD, the energy density of light-quark elds strongly coupled to slowly varying gluon elds can be negative, and so a condensate of pairs of quarks and antiquarks of nearly opposite momenta forms which breaks chiral symmetry, connnes quarks, and makes gluons massive.

Background The catalysis of reactions with organic molecules void of transition metals has lately assumed a prominent role in asymmetric synthesis. Among different catalysts, proline, an abundant, inexpensive amino acid available in both enantiomeric forms, has emerged as arguably the most practical and versatile. The simultaneous presence of a carboxylic acid and amine bestows a unique bifunct...

A method used recently to obtain a discrete formalism for classical fields with nonlocal actions preserving chiral symmetry and uniqueness of fermion fields yields a discrete version of Huygens’ principle with free discrete propagators that recover their continuum forms in certain limit.

An achiral double-swallow tailed tetracatenar compound forms a re-entrant isotropic liquid between a bicontinuous cubic phase and a nematic liquid crystalline phase. This isotropic liquid was found to represent a conglomerate of two immiscible chiral liquids. The chirality is retained and eventually becomes uniform at the transition to the cubic I432 phase.

Characteristic classes for the index of the Dirac family [unk](A) are computed in terms of differential forms on the orbit space of vector potentials under gauge transformations. They represent obstructions to the existence of a covariant Dirac propagator. The first obstruction is related to a chiral anomaly.

At high temperatures or densities, hadronic matter shows different forms of critical behaviour: colour deconfinement, chiral symmetry restoration, and diquark condensation. I first discuss the conceptual basis of these phenomena and then consider the description of colour deconfinement in terms of symmetry breaking, through colour screening and as percolation transition.

There exists a unique class of local higher spin gravities with propagating massless fields in $4d$---chiral gravity. Originally, it was formulated the light-cone gauge. We construct covariant form this theory as free differential algebra up to next-to-leading order, i.e., at level equations motion. It also contains recently discovered forms extensions self-dual Yang-Mills and gravity, well gra...