We analyse the proton Compton-scattering differential cross section for photon energies up to 325 MeV using Chiral Effective Field Theory (χEFT) and extract new values for the electric and magnetic polarisabilities of the proton. Our approach builds in the key physics in two different regimes: photon energies ω ∼ mπ (“low energy”), and the higher energies where the ∆(1232) resonance plays a key...

Chiral Effective Field Theory is for photon energies up to 200 MeV the tool to accurately determine the polarisabilities of the neutron from deuteron Compton scattering. A multipole analysis reveals that dispersive effects from an explicit ∆(1232) prove in particular indispensable to understand the data at 95 MeV measured at SAL. Simple power-counting arguments derived from nuclear phenomenolog...

Four new hetero- and homo-leptic iridium(III) bisterpyridine complexes have been prepared which incorporate aniline (tpy-φ-NH(2)), benzoic acid (tpy-φ-COOH), and benzyl alcohol (tpy-φ-CH(2)OH) substituents at the 4' positions of the tpy ligands (tpy = 2,2':6',2''-terpyridine, φ = phenylene). The electrochemical behaviour and ground and excited state spectroscopic properties of the complexes are...

The post-doctoral position will be supported by an ANR-CIS project (French National Research Agency, division of Intensive Scientific Computing and Numerical Simulations), PITAC (Parallélisation Incluant le Temps pour Accélérer les Calculs Parallelization including time in order to accelerate scientific computing, Project leader Y. Maday, Laboratoire Jacques-Louis Lions, UMR CNRS 7598, Universi...

Our objectives included calculating the permeability coefficient and dermal penetration rates (flux value) for 112 chemicals with occupational exposure limits (OELs) according to the LFER (linear free-energy relationship) model developed using published methods. We also attempted to assign skin notations based on each chemical's molecular structure. There are many studies available where formul...

Students in organic chemistry are taught a number of fundamental principles concerning the factors which govern the properties of organic compounds. Among these principles is the effect of substituents on the properties of aromatic rings, especially the benzene ring. For instance, we teach the students that the reactivity of the benzene molecule towards electrophilic substitution reactions is e...

Internet Electronic Conference of Molecular Design 2003, November 23 – December 6 Abstract Motivation. A continuous demand exists for novel bioactive molecules. When a lead structure has been discovered and looks promising for further development, series of analogues will be made. Normally, the synthesis of many compounds is required to improve on the activity, or to keep good activity while op...

Generally such non-mesogenes as endowed with the structural characteristics considered essential for exhibition of mesomorphism may be expected to show mixed mesomorphism in their binary mixtures over a range of temperature and cqncentration. A large number of Schiff's bases fall in this category of non-mesogenes ; hence their binary mixtures have been investigated which help sorting out condit...